CN217178742U - Indoor machine of air conditioner - Google Patents

Abstract

The utility model discloses an air conditioner, air conditioner includes: the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with an air outlet and an air return inlet; the electrostatic dust collection net is arranged at the air return port; anion generator, anion generator set up in the center department of air outlet, anion generator includes: the negative ion emitter comprises a positive electrode needle and a negative electrode needle, wherein the positive electrode needle and the negative electrode needle are arranged on the negative ion emitter at intervals. The air return opening is provided with the electrostatic dust removal net, and when air passes through the electrostatic dust removal net, particles with negative charges can be effectively adsorbed, so that the particles are collected and removed by the electrostatic dust removal net. And moreover, the negative ion generator is arranged at the central position of the air outlet, so that negative ions at the air outlet can be conveyed outwards more uniformly along with air outlet of the air conditioner, particle pollutants in the air can be more easily charged with negative charges, and can be effectively adsorbed and removed by the electrostatic dust removal net arranged at the air return port, and the purposes of efficiently removing dust and sterilizing are achieved.

Description

Indoor machine of air conditioner

Technical Field

The utility model belongs to the technical field of the air conditioning technique and specifically relates to an air conditioner indoor unit is related to.

Background

At present, most of air conditioners adopt an anion technology to carry out dust removal and sterilization treatment on indoor air aiming at pollution caused by indoor harmful particulate matters (such as PM2.5, PM10, microbial aerosol and the like). The anion module is used for dust removal independently, only plays a role in settling and dust removal, is prone to dust raising and recontamination, cannot thoroughly clean air, and has the problems that the number of emitted ions is not enough, the ion concentration is not uniformly distributed, and the like.

In the related art, there is a wall-mounted air conditioner, in which an electrostatic dust collection filter is disposed at an air outlet of the air conditioner, so that particles having negative charges in the air can be effectively adsorbed and electrolyzed by the electrostatic dust collection filter, thereby solving the problem of dust re-pollution and achieving the effect of cleaning the air. However, the negative ion module of the air conditioner is placed on the left side/right side of the air outlet of the air conditioner, so that the problem of uneven ion concentration distribution still exists after the air flow is blown out, the air flow air speed ratio of the single side of the air conditioner is small in the middle, and therefore the number of ions blown out by the air flow is small.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an air conditioner indoor unit sets up anion generator in the center department of casing air outlet, is favorable to making the ion concentration distribution of air outlet department more even like this by the air current back of blowing off to and effectively blow off more ion quantity.

According to the utility model discloses air conditioner indoor unit, air conditioner indoor unit includes: the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with an air outlet and an air return inlet; the electrostatic dust collection net is arranged at the air return port; an anion generator disposed at a center of the air outlet, the anion generator comprising: the negative ion emitter comprises a positive electrode needle and a negative electrode needle, wherein the positive electrode needle and the negative electrode needle are arranged on the negative ion emitter at intervals.

According to the utility model discloses air conditioner indoor unit, wherein, be provided with electrostatic precipitator net at the return air inlet of casing, when the air passes through electrostatic precipitator net, the particle that has the negative charge can be by effective absorption to get rid of by electrostatic precipitator net collection. And the air outlet of the shell is provided with the anion generator, and the anion generator is positioned at the central position of the air outlet, so that after being blown out by the airflow, the anion generator is favorable for enabling the concentration distribution of anions at the air outlet to be more uniform, and simultaneously more anions can be effectively blown out, thereby enabling particle pollutants in the air to be more easily charged with negative charges, and effectively being adsorbed and removed by the electrostatic dust removal net arranged at the air return port, and realizing the purpose of high-efficiency dust removal and sterilization.

According to some embodiments of the present invention, the top of the negative electrode pin is provided with a first discharge surface, and the first discharge surface is a conical surface; and/or a second discharge surface is arranged at the top of the anode needle and is a plane.

According to some embodiments of the utility model, the negative pole needle is at least two, positive pole needle and at least two the negative pole needle is in set up at interval in proper order on the anion generator.

According to some embodiments of the utility model, the negative pole needle is two, the positive pole needle sets up in two between the negative pole needle.

According to some embodiments of the present invention, the anion generator is a plurality of anion generators, and the anion generators are spaced apart from each other in the air duct of the air outlet.

According to some embodiments of the utility model, the positive pole needle with the negative pole needle is the metal utmost point needle.

According to some embodiments of the invention, the anion generator comprises: generator main part and safety cover, the safety cover with generator main part fixed connection, the generator main part set up in on the casing just anodal needle with the negative pole needle set up in the generator main part, the safety cover is provided with a plurality of protection fences.

According to some embodiments of the utility model, the air conditioner indoor unit still includes: the controller is electrically connected with the particulate matter sensor and the negative ion generator respectively, and the particulate matter sensor is used for detecting the indoor particulate matter concentration so as to selectively adjust the working state of the negative ion generator according to the detected indoor particulate matter concentration.

According to some embodiments of the present invention, the number of the negative electrode needles is two, the controller is provided with a first preset concentration and a second preset concentration, and the controller is configured to selectively control the number of the negative electrode needles to be activated according to whether the detected concentration of the indoor particulate matter is greater than the first preset concentration or the second preset concentration; or the like, or, alternatively,

the controller is provided with a third preset concentration and a fourth preset concentration, the negative ion generator is provided with a first preset voltage and a second preset voltage, and the controller is configured to selectively apply the first preset voltage or the second preset voltage to the negative ion generator according to whether the detected concentration of the indoor particulate matter is greater than the third preset concentration or the fourth preset concentration.

According to some embodiments of the utility model, the air conditioner indoor unit still includes: and the controller selectively adjusts the air speed and/or the air quantity of the air outlet according to the detected indoor particulate matter concentration and whether the user is indoors.

Additional aspects and advantages of the invention 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 invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a single anion generator according to an embodiment of the present invention in a position of an air conditioner indoor unit;

fig. 2 is a plan view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 3 is a perspective view of an anion generator according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a plurality of anion generators according to an embodiment of the present invention in a position of an indoor unit of an air conditioner;

fig. 5 is a logic flow diagram of a controller controlling the number of activations of the negative electrode needle according to the first preset concentration and the second preset concentration according to an embodiment of the present invention;

fig. 6 is a logic flow diagram of a controller controlling the ionizer to apply a first preset voltage or a second preset voltage according to a third preset concentration and a fourth preset concentration according to an embodiment of the present invention;

fig. 7 is a logic flow chart of an air conditioner indoor unit according to the concentration value of indoor particulate matter and whether a user controls the air speed/air volume indoors.

Reference numerals:

100. an air conditioner indoor unit;

10. a housing; 11. an air outlet; 12. an air return opening;

20. an electrostatic dust removal screen;

30. a negative ion generator; 31. a negative pole needle; 311. a first discharge surface; 32. a positive electrode needle; 321. a second discharge surface; 33. a generator body; 34. a protective cover; 341. and (4) protecting the fence.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

An air conditioner indoor unit 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 7.

As shown in fig. 1 to 3, the indoor unit 100 of the air conditioner includes: a shell 10, an electrostatic dust collection net 20 and a negative ion generator 30.

Wherein, the casing 10 is provided with an air outlet 11 and an air return opening 12, and the electrostatic dust collection net 20 is arranged at the air return opening 12. So set up, when the air sent to indoor through air outlet 11, anion generator 30 took place the anion, made the particulate matter in the air carry the negative charge, and indoor air is through electrostatic precipitator net 20 like this, and the particle that carries the negative charge can be effectively adsorbed to be collected by electrostatic precipitator net 20 and get rid of. In addition, a strong electric field is formed in the micropore channels of the electrostatic dust removal net 20, and under the action of the strong electric field, the bacteria and virus proteins are subjected to charge transfer to form a large potential difference, so that the bacteria and virus proteins are electrically disintegrated or punctured, the bacteria and viruses are killed efficiently, and the respiratory health of a user is improved.

Also, referring to fig. 1, the negative ion generator 30 is disposed at the center of the outlet port 11. So set up, after the air is blown out from air outlet 11, be favorable to making the anion concentration of air outlet 11 department carry to indoor more evenly, solved present anion module distribution and at 11 both sides of air outlet and lead to the uneven problem of anion concentration distribution, blow off more anion quantity simultaneously more easily to adsorb the particle pollutant in the air better.

And, as shown in fig. 3, the negative ion generator 30 includes: the positive electrode needle 32 and the negative electrode needle 31 are arranged on the negative ion emitter at intervals, and the positive electrode needle 32 and the negative electrode needle 31 are arranged on the negative ion emitter at intervals. So set up, through applying voltage to anodal needle 32 and negative pole needle 31, can effectively guarantee that negative ion generator 30 produces certain anion quantity to make anion and dust particle combine to subside, air-purifying. Moreover, after the positive ions generated by the positive electrode needle 32 and the negative ions generated by the negative electrode needle 31 are combined in the air, energy can be released instantly, and the effects of removing odor and sterilizing are achieved.

From this, be provided with anion generator 30 through the air outlet 11 at casing 10 to make anion generator 30 be located the central point of air outlet 11 and put, can make anion outwards transport uniformly along with the air conditioner air-out, can effectively blow off more anions simultaneously, thereby can make the granule pollutant in the air take the negative charge comparatively easily, and effectively arrange the electrostatic precipitator net 20 of return air inlet 12 department and adsorb and get rid of, realize the purpose that high-efficient dust removal was disinfected.

As shown in fig. 3, the top of the negative electrode pin 31 is provided with a first discharge surface 311, the first discharge surface 311 is a conical surface, and the top of the positive electrode pin 32 is provided with a second discharge surface 321, the second discharge surface 321 is a flat surface. So set up, set up the top of negative pole needle 31 into conical surface structure, can effectively promote the anion to take place, set up the top of positive pole needle 32 into planar structure, can effectively restrain the positive ion and produce, can produce more negative ions like this, make the particle pollutant in the air take the negative charge more easily, effectively improve the purification performance that negative ion generator 30 subsides the dust.

Further, the negative electrode needle 31 may be at least two, and the positive electrode needle 32 and the at least two negative electrode needles 31 are sequentially disposed at intervals on the negative ion generator 30. So set up, with the design of current single positive high voltage pole needle and single negative high voltage pole needle, set up two at least negative pole needles 31 on anion generator 30, can effectively increase the quantity that the anion takes place, further improve indoor air quality.

In an embodiment of the present invention, the number of the negative electrode pins 31 may be two, and the positive electrode pin 32 is disposed between the two negative electrode pins 31. So set up, both ends about anodal needle 32 are placed respectively to two negative pole needles 31, can guarantee the polarity cooperation between anodal needle 32 and two negative pole needles 31 well to can make two negative pole needles 31 produce more anion, thereby guarantee that the air can fully purify, simultaneously can also reduce the cost.

Of course, the negative electrode needles 31 may also be three, four, etc., and accordingly, the positive electrode needles 32 may be two, three, etc., and the positive electrode needles 32 and the negative electrode needles 31 are arranged alternately. So set up, can further increase the quantity that the anion takes place to improve indoor air quality better, promote user's comfortable experience. Moreover, even if one of the negative pole pins 31 fails, the negative ion generator 30 can still emit negative ions, thereby improving the quality of indoor air and being beneficial to improving the reliability of the indoor unit 100 of the air conditioner.

Further, there may be a plurality of negative ion generators 30, and a plurality of negative ion generators 30 are spaced on the air duct of the air outlet 11. So set up, can make the anion concentration of air outlet 11 department distribute to each corner indoor more evenly to a plurality of anion generators 30 can produce a large amount of anions, improve air purification efficiency better.

In addition, the positive electrode pin 32 and the negative electrode pin 31 are both metal electrode pins. So set up, the metal utmost point needle is sturdy and durable to compare in carbon brush electrode, the metal utmost point needle is difficult for receiving the dust pollution, thereby effectively guarantees the effect that the metal utmost point needle discharged and produces the anion. Specifically, the metal pole needle can be a tungsten needle, a steel needle and the like, so that the large-scale manufacturing is convenient and the cost is saved.

Wherein, the negative ion generator 30 includes: generator main body 33 and safety cover 34, safety cover 34 and generator main body 33 are fixedly connected, generator main body 33 is set on casing 10, and positive pole needle 32 and negative pole needle 31 are set on generator main body 33, and safety cover 34 is provided with a plurality of protection fences. So set up, set up positive pole needle 32 and negative pole needle 31 on generator main part 33 to set up a plurality of protection fences at the periphery of generator main part 33, can prevent effectively like this that positive pole needle 32 and negative pole needle 31 from being damaged by external force in the transportation, and prevent the unexpected fish tail of workman in the assembly process.

Moreover, a mounting groove is formed in the housing 10, the generator body 33 is placed in the mounting groove, and the positive electrode needle 32 and the negative electrode needle 31 are exposed outside the mounting groove, so that the concentration of negative ions at the air outlet 11 can be more uniformly blown into a room, and the air output at the air outlet 11 cannot be affected.

Furthermore, the air conditioner indoor unit 100 further includes: the controller is electrically connected with the particulate matter sensor and the negative ion generator 30 respectively, and the particulate matter sensor is used for detecting the indoor particulate matter concentration so as to selectively adjust the working state of the negative ion generator 30 according to the detected indoor particulate matter concentration. That is to say, when particulate matter sensor detects that the particulate matter concentration in the room that falls reaches a certain degree, can be with signal transmission to controller, the circuit at anion generator 30 place is switched on to the controller immediately, makes anion generator 30 take place the anion and reach suitable anion concentration, not only can play the effect of quick collection dirt degerming like this, can also avoid the long-time high output of anion to produce electrostatic interference to the inside or peripheral electrical components of air conditioner indoor set 100.

Further, as shown in fig. 5, the number of the negative electrode needles 31 may be two, the controller is provided with a first preset concentration and a second preset concentration, and the controller is configured to selectively control the activation number of the negative electrode needles 31 according to whether the detected concentration of the particulate matter in the room is greater than the first preset concentration or the second preset concentration. That is to say, can divide into the tertiary according to the pollution degree of indoor particulate matter, be below the first concentration of predetermineeing respectively, between first concentration of predetermineeing and the second is predetermineeing more than the concentration, like this can be according to the rank that indoor particulate matter concentration reached, the work quantity of negative pole needle 31 is regulated and control correspondingly to the controller to can effectively adjust anion concentration, realize the purpose of quick collection dirt degerming, and effectively avoid the long-time high output of anion to produce electrostatic interference's effect.

Wherein, the particle sensor can detect the particle with the particle diameter more than or equal to 0.3 μm and obtain the particle size and density information from 1 μm (micron) to 10 μm (PM1/PM2.5/PM 10). Generally, a first preset concentration of the particulate matter concentration may be used as an upper limit of the detection accuracy of the particulate matter sensor, for example, the detection accuracy of the particulate matter sensor is ± 10 μ g/m3, i.e., the first preset concentration of the particulate matter concentration is 10 μ g/m3 and the second preset concentration of the particulate matter concentration is 20 μ g/m 3.

Specifically, as shown in fig. 5, the control flow of the controller selectively regulating and controlling the working number of the negative pole needles 31 according to the first preset concentration or the second preset concentration is as follows:

when the concentration of the indoor particulate matters is less than or equal to the first preset concentration, the controller does not apply voltage to the negative electrode needle 31 of the negative ion generator 30, namely, the negative ion generator 30 is in a closed state; when the indoor particulate matter concentration is greater than the first preset concentration and less than or equal to the second preset concentration, applying a positive high voltage to the positive electrode needle 32 of the negative ion generator 30 and applying a negative high voltage to one negative electrode needle 31 of the negative ion generator 30; when the concentration of the particulate matter in the room is greater than the second preset concentration, a positive high voltage is applied to the positive electrode pin 32 of the negative ion generator 30, and a negative high voltage is applied to the two negative electrode pins 31 of the negative ion generator 30. So set up, through the work quantity of the negative pole needle 31 of intelligent regulation and control anion generator 30, can make anion generator 30 produce suitable anion concentration to eliminate corresponding indoor particulate matter concentration, not only can play the effect of dust removal and sterilization, can not cause anion generator 30's excessive load moreover, produce too much anion and lead to the inside or peripheral electrical components of air conditioner to produce the problem of electrostatic interference, effectively improved air conditioner indoor unit 100's economic suitability.

Alternatively, as shown in fig. 6, the controller is provided with a third preset concentration and a fourth preset concentration, the negative ion generator 30 is provided with a first preset voltage and a second preset voltage, and the controller is configured to selectively apply the first preset voltage or the second preset voltage to the negative ion generator 30 according to whether the detected concentration of the indoor particulate matter is greater than the third preset concentration or the fourth preset concentration. That is to say, can be according to the pollution degree of indoor particulate matter, the controller is regulated and control correspondingly and is applyed first preset voltage or second preset voltage to anion generator 30 to can effectively adjust anion concentration, realize the purpose of quick collection dirt degerming, and effectively avoid the long-time high output of anion to produce electrostatic interference's effect.

Wherein the third predetermined concentration of the particulate matter concentration may be 10 μ g/m3, the fourth predetermined concentration may be 20 μ g/m3, and the first predetermined voltage of the negative ion generator 30 may be ± 4kv, and the second predetermined voltage may be ± 8 kv. Since the second preset voltage is greater than the first preset voltage and the higher the operating voltage of the negative ion emitter 30 is, the higher the operating efficiency of the negative ion emitter 30 is, it is possible to control the negative ion generating efficiency of the negative ion emitter 30 by controlling the operating voltage.

Specifically, as shown in fig. 6, the control flow of the controller selectively controlling the application of the first preset voltage or the second preset voltage to the negative ion generator 30 according to the third preset concentration or the fourth preset concentration is as follows:

when the concentration of the indoor particulate matters is less than or equal to the third preset concentration, the controller does not apply voltage to the negative electrode needle 31 of the negative ion generator 30, namely, the negative ion generator 30 is in a closed state; when the concentration of the indoor particulate matters is greater than the third preset concentration and less than or equal to the fourth preset concentration, the controller applies a first preset voltage to the positive electrode needle 32 and the negative electrode needle 31 of the negative ion generator 30; when the concentration of the particulate matter in the room is greater than the second preset concentration, a second preset voltage is applied to the positive electrode pin 32 and the negative electrode pin 31 of the negative ion generator 30. With the arrangement, the first preset voltage or the second preset voltage of the anion generator 30 can be intelligently controlled, so that the anion generator 30 can generate proper anion concentration, the effects of dust removal and sterilization can be achieved, and the problem of electrostatic interference caused by excessive anions in the air conditioner or peripheral electrical components can be avoided.

From this, according to the pollution degree of the indoor particulate matter that particulate matter sensor detected, the controller can intelligent regulation and control anion generator 30's negative pole needle 31's the work quantity or apply the operating voltage who adjusts anion generator 30, make anion concentration reach with indoor particulate matter concentration assorted degree, thereby play the effect of high-efficient collection dirt degerming, and avoided the long-time high output of anion to the inside or peripheral electrical components production electrostatic interference of air conditioner indoor set 100.

In addition, the air conditioner indoor unit 100 further includes: and a person identifier, wherein the controller selectively adjusts the wind speed and/or wind quantity of the air outlet 11 according to the detected indoor particulate matter concentration and whether the user is indoors. That is to say, when indoor particulate matter concentration reaches certain pollution degree to the people's recognizer detects that the user is not when indoor, then the controller can intelligent control air speed or the amount of wind of air outlet 11, increases air speed or amount of wind promptly, can make more anions carry to indoor fast, and make a large amount of particle pollutants take the negative charge more easily, in order to reach the best dust collection degerming effect.

Specifically, referring to fig. 7, the control flow of the controller according to the detected indoor particulate matter concentration and whether the user intelligently controls the wind speed or the wind volume indoors is as follows:

when the indoor particulate matter concentration is greater than the first preset concentration (third preset concentration), the anion generator 30 generates anions, so that the particulate matter in the air is negatively charged, at the moment, if the character recognizer detects that the user is indoors, the anion generator operates according to the wind speed or the wind volume set by the user, if the character recognizer detects that the user is not indoors, the wind speed or the wind volume can be increased to the maximum value, so that the anions are rapidly distributed to all indoor corners along with the blown air, thereby enabling the particulate pollutants in the air to be more easily negatively charged, and being adsorbed and removed by the electrostatic dust removal net 20 arranged at the air return port 12, the purpose of efficient dust removal and sterilization is achieved, and the comfortable experience of the user is improved.

Therefore, the negative ion generator 30 is arranged at the air outlet 11 of the shell 10, and the negative ion generator 30 is located at the center of the air outlet 11, so that negative ions can be uniformly conveyed outwards along with air outlet of the air conditioner, and more negative ions can be effectively blown out, so that particle pollutants in the air can easily carry negative charges, and can be effectively adsorbed and removed by the electrostatic dust removal net 20 arranged at the air return port 12, and the purpose of efficient dust removal and sterilization is achieved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

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

Claims (10)

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

the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with an air outlet and an air return inlet;

the electrostatic dust collection net is arranged at the air return port;

an anion generator disposed at a center of the air outlet, the anion generator comprising: the negative ion emitter comprises a positive electrode needle and a negative electrode needle, wherein the positive electrode needle and the negative electrode needle are arranged on the negative ion emitter at intervals.

2. An indoor unit of an air conditioner according to claim 1, wherein a first discharge surface is arranged at the top of the negative electrode pin, and the first discharge surface is a conical surface; and/or the presence of a gas in the gas,

and a second discharge surface is arranged at the top of the anode needle, and the second discharge surface is a plane.

3. The indoor unit of an air conditioner according to claim 1, wherein the number of the negative pole needles is at least two, and the positive pole needle and the at least two negative pole needles are sequentially arranged on the negative ion generator at intervals.

4. An indoor unit of an air conditioner according to claim 3, wherein the number of the negative pole needles is two, and the positive pole needle is disposed between the two negative pole needles.

5. The indoor unit of claim 1, wherein the anion generator is a plurality of anion generators, and the anion generators are distributed at intervals on the air duct of the air outlet.

6. The indoor unit of claim 1, wherein the positive electrode needle and the negative electrode needle are both metal electrode needles.

7. An indoor unit of an air conditioner according to claim 1, wherein the anion generator comprises: generator main part and safety cover, the safety cover with generator main part fixed connection, the generator main part set up in on the casing just anodal needle with the negative pole needle set up in the generator main part, the safety cover is provided with a plurality of protection fences.

8. An indoor unit for an air conditioner according to claim 1, further comprising: the controller is electrically connected with the particulate matter sensor and the negative ion generator respectively, and the particulate matter sensor is used for detecting the indoor particulate matter concentration so as to selectively adjust the working state of the negative ion generator according to the detected indoor particulate matter concentration.

9. An indoor unit for an air conditioner according to claim 8, wherein the number of negative pole needles is two, the controller is provided with a first preset concentration and a second preset concentration, and the controller is configured to selectively control the number of the negative pole needles to be activated according to whether the detected concentration of the indoor particulate matter is greater than the first preset concentration or the second preset concentration; or the like, or, alternatively,

the controller is provided with a third preset concentration and a fourth preset concentration, the negative ion generator is provided with a first preset voltage and a second preset voltage, and the controller is configured to selectively apply the first preset voltage or the second preset voltage to the negative ion generator according to whether the detected concentration of the indoor particulate matter is greater than the third preset concentration or the fourth preset concentration.

10. An indoor unit for an air conditioner according to claim 8, further comprising: and the controller selectively adjusts the air speed and/or the air quantity of the air outlet according to the detected indoor particulate matter concentration and whether the user is indoors.

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