CN112833475A

CN112833475A - Indoor unit of air conditioner

Info

Publication number: CN112833475A
Application number: CN201911169272.3A
Authority: CN
Inventors: 汤展跃
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2021-05-25

Abstract

The invention discloses an air-conditioning indoor unit, which comprises: the air purifier comprises a shell, a heat exchange air channel, a purification air channel and a heat exchange air channel, wherein the heat exchange air channel and the purification air channel are mutually independent, the purification air channel is provided with a purification air inlet, a purification air outlet, an air inlet section and an air outlet section, the air inlet section is communicated with the purification air inlet, the air outlet section is communicated with the purification air outlet, and the shell is also provided with a connecting channel communicated with the heat exchange air channel and the air inlet section; and the purification module is arranged at the air outlet section. The technical scheme of the invention can increase the air output of the purification air outlet and change the air output temperature of the purification air outlet.

Description

Indoor unit of air conditioner

Technical Field

The invention relates to the field of air conditioning equipment, in particular to an air conditioner indoor unit.

Background

Currently, some air conditioning indoor units have a purification function. However, in the current purification structure and functional method, the purification scheme adopts constant temperature for purification, i.e. the heat exchange module and the purification module of the air conditioner are independent from each other. Due to the space limitation of the air conditioner structure, the purifying device of the scheme has small volume, and the purified air output is correspondingly small.

Disclosure of Invention

The invention mainly aims to provide an air conditioner indoor unit, aiming at increasing the air output of a purification air outlet.

In order to achieve the purpose, the invention provides an air conditioner indoor unit, which comprises

The air purifier comprises a shell, a heat exchange air channel, a purification air channel and a heat exchange air channel, wherein the heat exchange air channel and the purification air channel are mutually independent, the purification air channel is provided with a purification air inlet, a purification air outlet, an air inlet section and an air outlet section, the air inlet section is communicated with the purification air inlet, the air outlet section is communicated with the purification air outlet, and the shell is also provided with a connecting channel communicated with the heat exchange air channel and the air inlet section; and the number of the first and second groups,

and the purification module is arranged at the air outlet section.

Optionally, a first damper is further disposed in the casing, and the first damper can open or close the connection passage.

Optionally, the first damper is rotatably coupled to the housing.

Optionally, a driving motor is further arranged in the casing, and the driving motor is connected with the first air door to drive the first air door to open or close the connecting channel.

Optionally, the connecting channel has a first branch communicated with the air inlet section and a second branch communicated with the air outlet section, and the second branch is connected to the air outlet side of the purification module.

Optionally, a first damper in the enclosure is capable of selectively closing the first branch and the second branch.

Optionally, the purification air inlet is provided with a second air door, and the second air door can open or close the purification air inlet; and/or the presence of a gas in the gas,

the purification air outlet is provided with a third air door, and the third air door can be opened or closed the purification air outlet.

Optionally, the purification module comprises a humidification module and/or a filtration module.

Optionally, the indoor unit of the air conditioner is a floor type indoor unit of the air conditioner, the floor type indoor unit of the air conditioner is provided with the casing, the heat exchange air duct and the purification air duct are distributed in the up-down direction, and the heat exchange air duct is provided with a heat exchange air inlet and a heat exchange air outlet.

Optionally, the connecting channel is disposed between the bottom of the heat exchange air duct and the top of the purification air duct.

In the invention, because the airflow subjected to heat exchange in the heat exchange air channel is introduced into the purification air channel, in the heating state, the hot airflow in the heat exchange air channel partially flows into the purification air channel and is mixed with the airflow in the purification air channel, and the mixed airflow flows out from the purification air outlet, namely the temperature of the airflow blown out from the purification air outlet is higher, thus discomfort to users can be avoided. In the refrigeration state, part of cold air flow in the heat exchange air duct flows into the purification air duct, so that the purification air outlet blows out cold air. Meanwhile, the airflow flowing into the purification air channel from the heat exchange air channel is purified by the purification module and then blown out from the purification air outlet, so that more airflow can be purified, and the air output of the purification air outlet is increased. When the purification module is provided with the humidification module, the humidification quantity of the indoor unit of the air conditioner can be obviously improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic plan view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of the air conditioning indoor unit of fig. 1;

fig. 3 is a sectional view of the air conditioning indoor unit of fig. 2;

fig. 4 is a schematic view of the internal structure of the air conditioning indoor unit in fig. 2 in another state;

FIG. 5 is a schematic view of an embodiment of an indoor unit of an air conditioner according to the present invention;

FIG. 6 is a schematic view of an air conditioning indoor unit according to another embodiment of the present invention;

fig. 7 is a schematic view illustrating an operation principle of an indoor unit of an air conditioner according to still another embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Casing (CN)	171	Main channel
11	Heat exchange air inlet	172	First branch
				12	Heat exchange air outlet	173	Second branch
13	Heat exchange air duct	21	First air door
				14	Purifying air duct	22	Second air door
141	Air inlet section	23	Third air door
				142	Air outlet section	31	Indoor heat exchanger
15	Purifying air inlet	32	Heat exchange fan
				16	Purification air outlet	41	Purifying fan
17	Connecting channel	42	Purification module

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an air-conditioning indoor unit, as shown in fig. 1 to 3, the air-conditioning indoor unit comprises a casing 10, an indoor heat exchanger 31 and a heat exchange fan 32, wherein the casing 10 is provided with a heat exchange air inlet 11, a heat exchange air outlet 12 and a heat exchange air duct 13 communicating the heat exchange air inlet 11 and the heat exchange air outlet 12, and the indoor heat exchanger 31 and the indoor fan are both arranged on the heat exchange air duct 13. Indoor air enters the heat exchange air duct 13 from the heat exchange air inlet 11 under the action of the heat exchange fan 32, exchanges heat through the indoor heat exchanger 31, and then is blown out from the heat exchange air outlet 12.

Optionally, the indoor air conditioner unit includes a cabinet unit, or the indoor air conditioner unit includes a wall-mounted unit or the like. The cabinet machine has the casing 10 among the above-mentioned, casing 10 includes along the panel that extends of upper and lower direction, relative backplate, base and the top cap that the panel set up, the lower extreme of panel and backplate install in on the base, the top cap lid fits the upper end of panel and backplate. In the embodiment of the invention, the air-conditioning indoor unit is generally in a square barrel shape or a cylindrical shape, when the air-conditioning indoor unit is in the cylindrical shape, the panel and the back plate are both arc-shaped plates, and the panel and the back plate are connected with each other to form a closed annular structure in an enclosing manner. When the air conditioning indoor unit is in a square cylinder shape, the panel and the back plate are both straight plates, and the panel and the back plate are connected through the side plates to form a closed annular structure. Usually, the back plate is provided with a heat exchange air inlet 11, and the panel is provided with a heat exchange air outlet 12, so that the indoor unit of the air conditioner forms back air inlet and front air outlet. Optionally, heat exchange air outlets 12 are disposed at positions of the panel near the left side and the right side, so that the indoor unit of the air conditioner forms a structure with air outlets at the left side and the right side.

Referring to fig. 3, in order to make the indoor air cleaner, in an embodiment, the casing 10 has a clean air duct 14, and the clean air duct 14 and the heat exchange air duct 13 are two independent air ducts. An air treatment module is disposed within the purge air duct 14 to enable cleaning or filtering of the air. The purge air duct 14 has a purge air inlet 15 and a purge air outlet 16, and the purge air inlet 15 may be disposed on the back plate to prevent it from being exposed in the front. Similarly, the purge air outlet 16 may be provided on the back plate.

Alternatively, the purge air duct 14 and the heat exchange air duct 13 are distributed in the up-down direction, for example, the purge air duct 14 may be disposed below the heat exchange air duct 13. The arrangement is favorable for fully utilizing the space of the cabinet machine. For the wall-mounted unit, the purification air duct 14 and the heat exchange air duct 13 are distributed in the left-right direction.

The air treatment module is disposed near the bottom of the enclosure 10, for example, the air treatment module is mounted in a pedestal. The air treatment module can purify the air flowing to from purification air intake 15 purify the air in air outlet 16, so can provide the air after purifying for indoor for the room air is cleaner. It should be noted that the directional indications (such as up, down, left, right, front, and back … …) involved in the embodiment of the present invention are merely used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.

The air treatment module includes purification fan 41 and purification module 42, purification fan 41 with purification module 42 is located purify wind channel 14, the air gets into from purifying air intake 15 and purifies wind channel 14, warp purification module 42 handles the back by purify air outlet 16 and blow out, so can be for indoor air after providing the purification for the room air is cleaner.

In this embodiment, the purge fan 41 is a centrifugal fan. Of course, the purge fan 41 may be of other types, and is not limited thereto. When the cleaning fan 41 is a centrifugal fan, the axial direction thereof may be arranged in the lateral direction, for example, in the left-right direction.

The purification module 42 in the embodiment of the present invention can perform any one or more of filtering, sterilizing, humidifying, and washing on the air. Specifically, in one embodiment, the purification module 42 includes a filtration module, which may be a HEPA net, an activated carbon net, a formaldehyde clan net, or a general filter net, etc. In an embodiment, the purification module 42 includes a plurality of filter screens, specifically, the purification module 42 includes a first filter screen and a second filter screen, the mesh of the first filter screen is larger than the mesh of the second filter screen, the first filter screen is a common filter screen, and the second filter screen is any one or a combination of a HEPA (high efficiency particulate air) screen, an activated carbon screen, or a formaldehyde clansin screen. Optionally, first filter screen is located the air inlet side of second filter screen to can intercept the pollutant of great granule, avoid it to block up the second filter screen and influence the life of second filter screen. In addition, the purification module 42 may further include a humidification module, which can clean the air to achieve multiple effects of humidification and sterilization. When air is humidified, water particles for humidification are sprayed to the purification air duct 14, so that the air can be cleaned, and particulate matters such as dust in the air are mixed with water droplets and deposited. The humidifying module can be a humidifying membrane or a water beating wheel or a spray header and the like.

In the embodiment of the present invention, the casing 10 further has a connecting channel 17 for communicating the heat exchange air duct 13 and the purification air duct 14. This connecting channel 17 sets up in heat exchange fan 32 and indoor heat exchanger 31's air-out side, and the air after so the heat transfer of indoor heat exchanger 31 can flow to purification wind channel 14 through connecting channel 17 to mix the back together with the air in the purification wind channel 14, can follow and purify air outlet 16 and flow out.

In the invention, because the heat-exchanged air flow in the heat exchange air duct 13 is introduced into the purification air duct 14, in a heating state, a hot air flow in the heat exchange air duct 13 partially flows into the purification air duct 14 to be mixed with the air flow in the purification air duct 14, and the mixed air flow flows out from the purification air outlet 16, namely, the temperature of the air flow blown out from the purification air outlet 16 is higher, so that discomfort to a user can be avoided. In the cooling state, part of the cold air flow in the heat exchange air duct 13 flows into the purification air duct 14, so that the purification air outlet 16 blows out cold air.

The purifying air duct 14 has a purifying air inlet 15, a purifying air outlet 16, an air inlet section 141 and an air outlet section 142, the air inlet section 141 is communicated with the purifying air inlet 15, and the air outlet section 142 is communicated with the purifying air outlet 16; the purification module 42 is arranged at the air outlet section 142; the connecting channel 17 is communicated with the air inlet section 141. The airflow flowing into the purifying air duct 14 through the heat exchange air duct 13 is purified by the purifying module 42 and then blown out from the purifying air outlet 16, so that more airflow is purified, and when the purifying module 42 has a humidifying module, the humidifying amount of the indoor unit of the air conditioner can be obviously increased.

In an embodiment, a first damper 21 is further disposed in the housing 10, and the first damper 21 can open or close the connection channel 17, so that the connection channel 17 can be opened or closed according to the user's requirement. When the first damper 21 is closed, the heat exchange air duct 13 and the purification air duct 14 are two independent air ducts, and the air flows in the two air ducts do not interfere with each other and mix with each other. When the first damper 21 is open, the air flows in the two air ducts are at least partially mixed together.

Specifically, the first damper 21 is rotatably connected to the casing 10. Of course, the first damper 21 and the housing 10 may be connected in a sliding manner. The movable stroke of the rotary connection mode can be smaller, for example, the rotary connection mode can be realized only by rotating in the connecting channel 17, the movable stroke does not need to be additionally reserved, and the compactness of the whole structure is facilitated. The shape of the first damper 21 in the embodiment of the present invention is substantially similar to the cross section of the connecting passage 17, for example, the cross section of the connecting passage 17 is circular, and the first damper 21 is a circular plate; the cross section of the connecting passage 17 is square, and the first damper 21 is a square plate. The first damper 21 may also be of other shapes, at least the first damper 21 being able to completely close the connecting channel 17.

A driving motor is further arranged in the casing 10, and the driving motor is connected with the first air door 21 so as to drive the first air door 21 to open or close the connecting channel 17. The automation degree is higher by driving the first damper 21 to open or close by the driving motor.

In one embodiment, the connecting channel 17 has a first branch 172 communicating with the air inlet section 141 and a second branch 173 communicating with the air outlet section 142, and the second branch 173 is connected to the air outlet side of the purification module 42. Specifically, the connecting passage 17 has a main passage 171, the main passage 171 connects with the heat exchange air duct 13, and the first branch 172 and the second branch 173 both connect with the main passage 171. In this embodiment, when the purifying air outlet 16 is closed, the air flow in the purifying air duct 14 can flow to the heat exchanging air duct 13, and the second branch 173 is disposed, and the second branch 173 is connected to the air outlet side of the purifying module 42, so that the air flow in the purifying air duct 14 can be purified by the purifying module 42 and then flows to the heat exchanging air duct 13, thereby ensuring that a part of the air flow blown out from the heat exchanging air duct 13 is filtered or humidified by the purifying module 42.

It should be noted that the descriptions of "first", "second", etc. referred to in the embodiments of the present invention are only used for descriptive purposes, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 5, in an embodiment, the purge inlet 15 is provided with a second air door 22, and the second air door 22 can open or close the purge inlet 15; and/or, the purification air outlet 16 is provided with a third air door 23, and the third air door 23 can open or close the purification air outlet 16. It should be noted that the meaning of "and/or" appearing throughout is to include three juxtaposed aspects, exemplified by "a and/or B", including either aspect a, aspect B, or aspects where both aspects a and B are satisfied.

The second damper 22 can be used to open or close the purge air inlet 15 to adjust the air output of the purge air outlet 16. The third damper 23 can be used to open or close the purge air outlet 16 to control the flow direction of the air flow, i.e., the flow direction of the air flow in the connecting channel 17.

Specifically, motors may be respectively disposed at the purge air inlet 15 and the purge air outlet 16 to respectively drive the second damper 22 and the third damper 23 to open and close. In addition, the second damper 22 is provided on the air-out side of the purge fan 41, i.e., between the purge fan 41 and the purge module 42. The second air door 22 can be rotatably connected with the casing 10, and when the second air door 22 is in an up-and-down extending state, the purification air inlet 15 is closed; when the second damper 22 is rotated upward, the purge air intake 15 is opened. In other embodiments, the second damper 22 may be disposed on the air intake side of the purge fan 41.

In one embodiment, the first damper 21 is disposed corresponding to the main passage 171 to open or close the main passage 171, and when the main passage 171 is open, the first branch 172 and the second branch 173 are both communicated with the purge air duct 14.

As shown in fig. 3, when the first damper 21 in fig. 3 is opened and the third damper 23 is opened, since the air pressure at the purge air outlet 16 is low, part of the air flow in the heat exchange air duct 13 flows to the purge air duct 14 and then flows out from the purge air outlet 16, so that the purge air outlet 16 blows out cold air or hot air. Specifically, a portion of the airflow flows into the purge air duct 14 from the first branch 172, and flows out of the purge air outlet 16 after being purged by the purge module 42. Another part of the air flow flows into the purge air duct 14 from the second branch 173 and directly out of the purge air outlet 16. In the process, when the second damper 22 is opened, the indoor airflow can also enter the purge air duct 14 from the purge air inlet 15, and is purged by the purge module 42 and then blown out from the purge air outlet 16. At this time, since the airflow in the purge air duct 14 is a mixture of two airflows, the airflow in the purge air duct 14 is increased, more airflow is purged, and the airflow blown out from the purge air outlet 16 is more, which is equivalent to blowing out strong wind from the purge air outlet 16. In this process, when the second damper 22 is closed, the airflow blown out from the purge air outlet 16 is totally branched from the heat exchange air duct 13, and the air output of the purge air outlet 16 is less, that is, the blown air is weak air. The controller of the indoor unit of the air conditioner can control the second damper 22 to open or close so as to switch the outlet air of the clean outlet 16 between strong air and weak air. Meanwhile, in the process, the other part of the air flow in the heat exchange air duct 13 is blown out from the heat exchange air outlet 12.

When the third damper 23 is closed and the second damper 22 is opened, the air flow in the purge air duct 14 flows to the heat exchange air duct 13 through the connecting passage 17. Specifically, the air flow enters the purge air duct 14 from the purge air inlet 15, a part of the air flow in the purge air duct 14 directly flows from the first branch 172 to the heat exchange air duct 13, and another part of the air flow is purified by the purification module 42 and then flows from the second branch 173 to the heat exchange air duct 13. All the air flow in the purifying air duct 14 is mixed with the air flow entering from the heat exchange air inlet 11 in the heat exchange air duct 13 and finally blown out from the heat exchange air outlet 12.

As shown in fig. 4, the first damper 21 in fig. 4 is closed, and at this time, the connection channel is disconnected, and the heat exchange air duct and the purification air duct are two independent channels that are not communicated with each other.

In one embodiment, the first damper 21 in the housing 10 can selectively close the first branch 172 and the second branch 173. Specifically, the first damper 21 is movably connected with the cabinet 10 to be able to have at least a first position, a second position, and a third position. In the first position, the first damper 21 opens the first branch 172 and closes the second branch 173, and when the third damper 23 is opened, part of the air in the heat exchange air duct 13 flows from the first branch 172 into the purge air duct 14. In the second position, the first damper 21 closes the first branch 172 and opens the second branch 173, and when the third damper 23 is closed and the second damper 22 is opened, the air flow in the purge air duct 14 flows from the second branch 173 into the heat exchange air duct 13. In the third position, the first damper 21 simultaneously closes the first branch 172 and the second branch 173. In this embodiment, after the first damper 21 is provided, the first damper 21 can be controlled to move as required, and the first branch 172 and the second branch 173 can be switched.

In an embodiment, the indoor air-conditioner unit is a floor-type indoor air-conditioner unit, the floor-type indoor air-conditioner unit has the casing 10, and the heat exchange air duct 13 and the purification air duct 14 are distributed in the vertical direction. For example, in some embodiments, the heat exchange duct 13 is located above the purge duct 14. Specifically, in one embodiment, the housing 10 includes an upper housing and a lower housing, the upper housing and the lower housing are two-part housings formed separately, and the two-part housings are assembled together to form a whole. A heat exchange air duct 13 is formed in the upper shell, and a purification air duct 14 is formed in the lower shell. Of course, in other embodiments, the casing 10 may also be a single integral casing extending in the up-down direction, i.e. the upper casing and the lower casing are integrally formed. By arranging the heat exchange air duct 13 and the purification air duct 14 in the vertical direction, the space of the floor type air conditioner indoor unit can be fully utilized, and arrangement of the two air ducts is facilitated. In addition, the casing 10 may also include an inner casing and an outer casing, the inner casing being located inside the outer casing, and the inner casing forming the heat exchange air duct 13 and the purge air duct 14.

Optionally, the connecting channel 17 is disposed between the bottom of the heat exchange air duct 13 and the top of the purge air duct 14, so that the connecting channel 17 has a short length to facilitate rapid airflow.

The operation flow of the air conditioning indoor unit will be described in detail below with reference to fig. 5 to 7, where the dotted arrows in fig. 5 to 7 indicate the flow direction of the airflow. The air-conditioning indoor unit in the embodiment of the present invention has at least three operating states, as shown in fig. 5, the air-conditioning indoor unit is in the normal mode, at this time, the first damper 21 is closed, the heat exchange air duct 13 and the purification air duct 14 are not communicated with each other, and the second damper 22 are opened. A part of air enters the heat exchange air duct 13 from the heat exchange air inlet 11, and is blown out from the heat exchange air outlet 12 after being subjected to heat exchange by the indoor heat exchanger 31, so that a conventional refrigeration or heating mode is performed. Meanwhile, part of the air enters the purge air duct 14 from the purge air inlet 15, is filtered or humidified by the purge module 42, and is blown out from the purge air outlet 16 to perform a normal purge mode.

As shown in fig. 6, the indoor unit of the air conditioner is in the weak air purification mode, in which the first damper 21 opens the first branch 172, the heat exchange air duct 13 and the purification air duct 14 are communicated, and the second damper 22 is closed and the second damper 22 is opened. A part of air enters the heat exchange air duct 13 from the heat exchange air inlet 11, and after heat exchange is carried out through the indoor heat exchanger 31, a part of air is blown out from the heat exchange air outlet 12 to carry out a conventional refrigeration or heating mode; part of the air flows into the air inlet section 141 of the purge air duct 14 through the first branch 172, and is filtered or humidified by the purge module 42 and blown out through the purge air outlet 16.

As shown in fig. 7, the indoor unit of the air conditioner is in the strong wind purification mode, in which the first damper 21 opens the first branch 172, the heat exchange air duct 13 communicates with the purification air duct 14, and the second damper 22 are opened. A part of air enters the heat exchange air duct 13 from the heat exchange air inlet 11, and after heat exchange is carried out through the indoor heat exchanger 31, a part of air is blown out from the heat exchange air outlet 12 to carry out a conventional refrigeration or heating mode; part of the air flows into the air inlet section 141 of the purge air duct 14 through the first branch 172, and is filtered or humidified by the purge module 42 and blown out through the purge air outlet 16. Meanwhile, part of the air enters the purifying air duct 14 from the purifying air inlet 15, is mixed with the air from the heat exchange air duct 13, is filtered or humidified by the purifying module 42, and is blown out from the purifying air outlet 16.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

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

the air purifier comprises a shell, a heat exchange air channel, a purification air channel and a connecting channel, wherein the heat exchange air channel and the purification air channel are mutually independent, the purification air channel is provided with a purification air inlet, a purification air outlet, an air inlet section and an air outlet section, the air inlet section is communicated with the purification air inlet, the air outlet section is communicated with the purification air outlet, and the shell is also provided with the connecting channel which is communicated with the heat exchange air channel and the air inlet section; and the number of the first and second groups,

and the purification module is arranged at the air outlet section.

2. An indoor unit of an air conditioner according to claim 1, wherein a first damper is further provided in the casing, and the first damper is capable of opening or closing the connection passage.

3. An indoor unit of an air conditioner according to claim 2, wherein the first damper is rotatably connected to the casing.

4. An indoor unit of an air conditioner according to claim 2, wherein a driving motor is further provided in the casing, and the driving motor is connected to the first damper so as to drive the first damper to open or close the connection passage.

5. An indoor unit of an air conditioner according to any one of claims 1 to 4, wherein the connection passage has a first branch communicating with the air inlet section and a second branch communicating with the air outlet section, and the second branch is connected to an air outlet side of the purification module.

6. An indoor unit of an air conditioner according to claim 5, wherein a first damper in the casing is capable of selectively closing the first branch and the second branch.

7. The indoor unit of claim 5, wherein the purge air inlet is provided with a second damper capable of opening or closing the purge air inlet; and/or the presence of a gas in the gas,

8. An indoor unit of an air conditioner according to claim 1, wherein the purification module includes a humidification module and/or a filtration module.

9. The indoor unit of claim 1, wherein the indoor unit is a floor type indoor unit, the floor type indoor unit has the casing, the heat exchange duct and the purification duct are distributed in an up-down direction, and the heat exchange duct has a heat exchange air inlet and a heat exchange air outlet.

10. An indoor unit of an air conditioner according to claim 9, wherein the connection duct is provided between the bottom of the heat exchange duct and the top of the purification duct.