WO2019223471A1

WO2019223471A1 - Indoor unit of air conditioner and control method therefor

Info

Publication number: WO2019223471A1
Application number: PCT/CN2019/083503
Authority: WO
Inventors: 刘光朋; 李英舒; 史为品; 于尊才
Original assignee: 青岛海尔空调器有限总公司
Priority date: 2018-05-21
Filing date: 2019-04-19
Publication date: 2019-11-28
Also published as: CN108731107A

Abstract

An indoor unit of an air conditioner and a control method therefor. The indoor unit comprises a body (1). A heat exchanger (13) and a blower are provided in the body (1). The indoor unit for an air conditioner further comprises an air supply module (2) comprising a housing (21). The housing (21) is provided with an air inlet pipe (211) in communication with the outdoor. A purifying assembly (27), an induced draft fan (23), and a connecting pipe (25) are provided in the housing (21). The first end of the connecting pipe (25) is connected to the induced draft fan (23), and the second end of the connecting pipe (25) extends to the air inlet side of the heat exchanger (13). Outdoor fresh air is driven by the induced draft fan (23) to enter the housing (21) through the air inlet pipe (211) and continue to flow through the purifying assembly (27), the induced draft fan (23), and the connecting pipe (25), and then is discharged to the air inlet side of the heat exchanger (13). The connecting pipe (25) is provided with a flow guide plate (251) that introduces the air nearby into the connecting pipe (25) during the operation of the induced draft fan (23). By providing the air supply module (2), the nose during operation of the indoor unit of the air conditioner can be greatly reduced.

Description

Air conditioner indoor unit and control method thereof

Technical field

The invention relates to the technical field of air conditioning, in particular to an air conditioner indoor unit and a control method thereof.

Background technique

With the improvement of living standards, people have higher and higher requirements for the quality of life, and this requirement is particularly evident in household appliances. Take air-conditioning as an example. When the temperature difference between indoor and outdoor is large, in order to meet the needs of users for rapid cooling / heating after entering the room from the outdoors, the existing air-conditioning usually has a rapid cooling / heating function. In function, the compressor of the air conditioner works at a higher frequency to quickly increase the cooling capacity / heating capacity. The indoor unit of the air conditioner operates at high speed and high air volume to return the cold / hot air after heat exchange to the room, thereby achieving indoor Fast temperature adjustment.

Although the rapid cooling / heating function of the air conditioner mentioned above solves the user's rapid cooling / heating needs to a certain extent, this air conditioner also inevitably has the following problems: the performance of traditional air conditioners (that is, the cooling / heating effect) and the wind Noise is a non-adjustable and contradictory solution. The air conditioner increases the air supply volume to increase the cooling / heating effect. As the air supply volume increases, the noise also increases. However, if the noise reduction index is met, the air conditioner The performance will be limited to some extent. These problems are particularly obvious in some special application scenarios such as libraries, wards, and rooms for insomniacs. In other words, the conventional air conditioner has a problem of high noise when the air supply volume is large.

Accordingly, there is a need in the art for a new air-conditioning indoor unit and a control method thereof to solve the above problems.

Summary of the Invention

In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing air conditioner has a large noise when the air supply volume is large, the present invention provides an air conditioner indoor unit including a body, and the body is provided with heat. Exchanger and blower, the air-conditioning indoor unit further includes a supplementary air module, the supplementary air module includes a housing, the housing is provided with an air inlet pipe communicating with the outdoor, and the housing is provided with a purification component, a lead A fan and a connecting pipe, the first end of the connecting pipe is connected to the exhaust port of the induced fan, the second end of the connecting pipe extends to the air inlet side of the heat exchanger, and the air supply module is provided Driven by the induced draft fan, the outdoor fresh air is introduced into the housing through the air inlet pipe and flows through the purification component, the induced draft fan and the connecting pipe, and then is discharged through the second end of the connecting pipe. To the air inlet side of the heat exchanger; a drainage plate is provided on the connection pipe, and the drainage plate can introduce nearby air into the connection pipe when the induced fan is in operation.

In the above-mentioned preferred technical solution of the air-conditioning indoor unit, the cross-section of the drainage plate is arc-shaped, and the arc-shaped shape can draw nearby air to the direction of the second end of the connection pipe.

In the above-mentioned preferred technical solution of the air-conditioning indoor unit, an air inlet is further provided on the casing near the drainage plate.

In the above-mentioned preferred technical solution of the air-conditioning indoor unit, the housing is provided with a first through hole, the body is provided with a second through hole, and the second end of the connection pipe passes through the first through hole. And the second through hole extends to the air inlet side of the heat exchanger.

In a preferred technical solution of the air-conditioning indoor unit described above, the connecting pipe has a curved surface segment; and / or the second end of the connecting pipe has a bell mouth structure.

In a preferred technical solution of the air-conditioning indoor unit described above, the purification assembly includes a partition and a filter layer, the partition divides the housing into a first chamber and a second chamber, and the induced draft fan is located in the A first chamber, the filter layer is located in the second chamber, a filter hole is opened in the partition, and the first chamber and the second chamber are communicated through the filter hole.

In the above-mentioned preferred technical solution of the air-conditioning indoor unit, the partition is sealedly connected to the casing.

In a preferred technical solution of the above-mentioned air-conditioning indoor unit, an end of the air inlet pipe connected to the casing has a bell mouth structure.

In a preferred technical solution of the air-conditioning indoor unit described above, the air-conditioning indoor unit is a wall-mounted air-conditioning indoor unit, and the air supplement module is detachably disposed on the back of the body.

The present invention also provides a control method of an air conditioner indoor unit. The control method includes:

Obtaining a set wind speed of the air-conditioning indoor unit;

When the set wind speed is greater than a wind speed threshold, controlling the induced draft fan and the blower to run simultaneously at a first set speed and a second set speed, respectively.

Those skilled in the art can understand that, in a preferred technical solution of the present invention, the air-conditioning indoor unit includes a body, and a heat exchanger and a blower are provided in the body. The air-conditioning indoor unit further includes an air supply module, and the air supply module includes a casing. The casing is provided with an air inlet pipe communicating with the outdoor. The casing is provided with a purification component, an induced draft fan and a connecting pipe. The first end of the connecting pipe is connected to the exhaust port of the induced fan, and the second end of the connecting pipe extends to the heat. On the air inlet side of the exchanger, the air supply module is set to be able to introduce outdoor fresh air into the housing through the air inlet pipe and flow through the purification component, induced air fan and connecting pipe through the second end of the connecting pipe driven by the induced fan. It is discharged to the air inlet side of the heat exchanger; a drainage plate is provided on the connection pipe, and the drainage plate can introduce nearby air into the connection pipe when the induced fan is working.

By providing an air supply module on the air-conditioning indoor unit, the present invention can significantly reduce the noise of the air-conditioning indoor unit when it is operated at a large air volume. Specifically, the performance of the air-conditioning indoor unit depends on the heat exchange efficiency, and the heat exchange efficiency is directly related to the air supply volume. The supplementary air module of the present invention can directly send indoor air into the heat exchanger to participate in the cycle, which reduces the air-conditioning indoor The working pressure of the blower inside the machine. Repeated experiments, observations, analysis, and comparisons by the inventors found that when the blower in the air-conditioning indoor unit and the induced draft fan in the make-up module are started at the same time, the air-conditioned indoor unit can share the amount of air delivered at the same time by the induced fan and the blower. Therefore, under the premise of providing the same air supply volume, the noise generated when the air blower in the air conditioner indoor unit is operated at high speed is greatly reduced, and the operation performance of the air conditioner is unchanged or even improved. The installation of the air inlet pipe enables the air conditioner indoor unit to introduce outdoor fresh air during operation, which guarantees the oxygen content of the indoor air and solves many problems such as poor indoor air turbidity. The setting of the purification component enables the indoor unit of the air conditioner to circulate and purify the indoor air during operation, which improves the cleanliness of the indoor air and reduces floating particles in the air. That is to say, the present invention solves the problem of high noise in the prior art when the air conditioner is operated at a large air volume, and has a simple structure and a significant effect, which is suitable for large-scale popularization and use.

BRIEF DESCRIPTION OF THE DRAWINGS

The air-conditioning indoor unit of the present invention and a control method thereof will be described below with reference to the drawings and in combination with a wall-mounted air-conditioning indoor unit. In the drawings:

1 is a schematic structural diagram of a wall-mounted air conditioner indoor unit according to a first embodiment of the present invention;

2 is an exploded schematic view of a wall-mounted air conditioner indoor unit according to a first embodiment of the present invention;

3 is a cross-sectional view of FIG. 1 at A-A;

4 is a rear view of the wall-mounted air conditioner indoor unit according to the first embodiment of the present invention after the rear cover and the filter layer are removed;

5 is a working principle diagram of a wall-mounted air conditioner indoor unit according to a first embodiment of the present invention, which shows a suction process of a draft fan;

FIG. 6 is a working principle diagram of a wall-mounted air-conditioning indoor unit in a first embodiment of the present invention, which illustrates a process of supplementary air of the wall-mounted air-conditioning indoor unit; FIG.

7 is an exploded schematic view of a wall-mounted air conditioner indoor unit in a second embodiment of the present invention;

FIG. 8 is a working principle diagram of a wall-mounted air conditioner indoor unit in a second embodiment of the present invention, which shows a suction process of a draft fan;

FIG. 9 is a flowchart of a method for controlling a wall-mounted air conditioner indoor unit according to the present invention.

Reference list

1. Main body; 11. Return air outlet; 12. Air outlet; 13. Heat exchanger; 14. Cross-flow fan; 2. Make-up air module; 21. Shell; 21a; Front cover; 21b; Rear cover; 211 Air inlet pipe; 212; Air inlet; 213; First through hole; 223; Second through hole; 214; Mounting hole; 23; Induced fan; 230; Exhaust port; 231; Volute; 232; Motor; 233 , Fan; 25, connecting pipe; 251, drainage plate; 27, purification component; 271, partition plate; 272, filter layer; 273 filter hole; 281, first chamber; 282, second chamber.

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the air inlet pipe in the drawing is disposed in the middle of the top surface of the casing, this positional relationship is not static, and those skilled in the art can adjust it as needed to suit specific applications. For example, the air inlet pipe can also be provided on the side or bottom of the casing.

It should be noted that, in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The term of the indicated direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for convenience of description, and does not indicate or imply that the device or element must have a specific orientation, structure and operation in a specific orientation Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only, and should not be construed to indicate or imply relative importance.

In addition, it should be noted that, in the description of the present invention, unless explicitly stated and limited otherwise, the terms "installation", "connected", and "connected" should be understood in a broad sense. For example, they may be fixed connections or It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In order to solve the problem that the existing air conditioner has a large air supply noise when the air volume is large, the present invention proposes a wall-mounted air conditioner indoor unit, so as to reduce the noise of the air conditioner indoor unit and increase the amount of induced air, thereby breaking the traditional air conditioner indoor unit. The deadlock where air volume and noise reduction cannot be achieved at the same time improves the user experience.

First, a first embodiment of a wall-mounted air-conditioning indoor unit according to the present invention will be described with reference to FIGS. 1 to 6. 1 is a schematic structural diagram of a wall-mounted air-conditioning indoor unit according to the first embodiment of the present invention; FIG. 2 is an exploded schematic view of the wall-mounted air-conditioning indoor unit according to the first embodiment of the present invention; Sectional view at AA; FIG. 4 is a rear view of the wall-mounted air conditioner indoor unit in the first embodiment of the present invention after removing the rear cover and the filter layer; FIG. 5 is a wall-mounted air conditioner indoor in the first embodiment of the present invention Fig. 6 is a working principle diagram of the wall-mounted air-conditioning indoor unit in the first embodiment of the present invention, which shows the supplement of the wall-mounted air-conditioning indoor unit. Wind process.

As shown in FIG. 1 to FIG. 3, the wall-mounted air conditioner indoor unit (hereinafter referred to as an indoor unit) of the present invention mainly includes a main body 1 and an air supply module 2 installed outside the main body 1. An air return port 11 and an air supply port are provided in the main body 1 12. Heat exchanger 13, cross-flow fan 14 (ie, blower), control module (not shown in the figure), and the like. The air supply module 2 is installed close to the back of the indoor unit, and includes a housing 21. The housing 21 is provided with an air inlet pipe 211. The housing 21 is provided with a purification component 27, an induced draft fan 23, and a connection pipe 25. The induced draft fan 23 has an air inlet and an air outlet 230. The first end of the connection pipe 25 is connected to the induced fan 23, and the second end extends to the air inlet side of the heat exchanger 13. The supplementary air module 2 is set to be able to introduce outdoor fresh air into the casing 21 through the air inlet pipe 211 under the drive of the induced draft fan 23, and then pass through the purification module 27, the suction port of the induced draft fan 23, and the exhaust port 230 of the induced draft fan 23 in this order. After connecting with the connecting pipe 25, it is discharged from the second end of the connecting pipe 25 to the air inlet side of the heat exchanger 13.

Referring to FIG. 5 and FIG. 6 in combination with FIGS. 1 to 3, when the indoor unit is working, the cross-flow fan 14 inside the indoor unit and the draft fan 23 in the air induction module rotate at a low and medium speed at the same time. Driven by the return air inlet 11 into the body 1 and passing through the heat exchanger 13, it is sent into the room from the air outlet 12; the outdoor fresh air is driven by the induced draft fan 23 into the casing 21 from the air inlet pipe 211 and passes through the purification module 27 in turn. The air intake of the induced draft fan 23, the exhaust of the induced draft fan 23, and the connection pipe 25 are discharged to the air inlet side of the heat exchanger 13 through the second end of the connection pipe 25 and mixed with the indoor air introduced by the cross-flow fan 14. It is sent into the room through the air outlet 12.

From the above description, it can be seen that the indoor unit of the present invention can start the induced fan 23 and the cross-flow fan 14 at the same time at low and medium speeds during operation, greatly reducing the noise of the indoor unit when the cross-flow fan 14 operates at high speed alone. That is to say, the present invention solves the problem of high noise in the air conditioner in the prior art when the air volume is running, and the air supply module 2 has a simple structure and a significant effect, and can increase the number of embedded devices without affecting the aesthetics of the indoor unit. Supply air volume, auxiliary air-conditioning for cooling / heating, suitable for large-scale popularization.

Referring to FIG. 2 and FIG. 4 and according to the orientation shown in FIG. 2, in a possible embodiment, the housing 21 is roughly a rectangular parallelepiped, which includes a front cover 21 a and a rear cover 21 b. The front cover 21 a can be snapped together. , Gluing, screwing, etc., and fastened to the rear cover 21b. Similarly, the front cover 21a can be connected to the body 1 in the same manner. The purification module 27 includes a partition 271 and a filter layer 272, and the outer edge of the partition 271 is hermetically connected to the casing 21, and the connection allows the partition 271 to separate the casing 21 into a first chamber 281 and a second chamber that are independent of each other. 282, the induced draft fan 23 is located in the first chamber, and the filter layer 272 is located in the second chamber. A filter hole 273 is defined in the partition plate 271, and the first chamber communicates with the second chamber through the filter hole 273. The filter layer 272 is fixed in a groove provided on the left side of the partition 271 by means of bonding or clamping, etc., and the second through hole is completely covered after being fixed. The filter layer 272 is a filter structure that can adsorb or decompose harmful gases in the air, such as HEPA filters or activated carbon filters. HEPA filters usually include three layers (primary filter layer, charged layer, electrostatic dust collection layer), The removal efficiency of particles with a diameter of 0.3 microns or less can reach more than 99.97%. As can be seen in FIG. 4, the area of the partition plate 271 (that is, the projected area on the front cover 21 a) is not equal to the area of the front cover 21 a, but the induced draft fan 23 is sealed in a manner that is significantly smaller than the area of the front cover 21 a. In the first chamber formed by the partition 271 and the front cover 21a.

Continuing to refer to FIG. 2, the upper side of the rear cover 21 b is provided with a mounting hole 214. The indoor end of the air inlet pipe 211 has a bell mouth structure, and the bell mouth structure is installed in cooperation with the mounting hole 214, such as plugging or screwing; The outdoor end of the air duct 211 extends through the wall to the outside. The induced draft fan 23 is preferably a centrifugal fan, which includes a volute 231, a motor 232, and a fan 233. The fan 233 is formed with an air inlet. The volute 231 is provided with an exhaust port. After assembly, the fan 233 and the filter of the induced fan 23 The hole 273 is substantially coaxial. A first through hole 213 is provided at the upper part of the right side surface of the front cover 21a, and a second through hole 223 is provided at a corresponding position on the main body 1. The first end of the connection pipe 25 is connected to the exhaust port of the induced draft fan 23 and is connected. The second end of the tube 25 extends through the first through hole 213 and the second through hole to the air inlet side of the heat exchanger 13. The pipe between the first end and the second end of the connecting pipe 25 has a curved surface section, that is, the cross section of the pipe is arc-shaped, and the second end of the connecting pipe 25 has a bell mouth structure.

Referring to FIG. 3 and according to the orientation shown in FIG. 3, a plurality of drainage plates 251 are also provided in the connection pipe 25. An air inlet 212 is also provided on the housing 21 near the drainage plate 251. For example, the air inlet 212 is opened on the connection pipe 25. The upper front cover 21 a is arranged above, and the air inlet 212 is disposed adjacent to the mounting hole 214. The draft plate 251 can introduce nearby indoor air into the connection pipe 25 and mix it with the air flow from the draft fan 23 and eject it from the second end of the connection pipe 25. As shown in FIG. 3, the drainage plate 251 is preferably in a concave arc shape in cross section, so that when the indoor air flows through the curved drainage plate 251 from above the drainage plate 251, it can be better guided to the first connection tube 25. Both ends.

In the control mode, the air supply module 2 can be controlled separately. For example, the air supply module 2 is equipped with an electric control component (not shown in the figure). The remote control for the air supply module 2 or a mobile APP is used to control the electric control component. To control, you can also combine the air supply module 2 with the air conditioner. For example, the buttons on the air conditioner remote control for controlling the air supply module 2 are reserved in advance, and the main control component is directly connected to the air conditioner through the air conditioner remote control. The device reserves an interface to implement air-to-air supply module 2 control.

The above arrangement has the advantage that, through the setting of the supplementary air module 2, when the indoor unit is operating, the induced draft fan 23 and the cross-flow fan 14 are operated together at a low and medium speed instead of the high-speed operation of the cross-flow fan 14, so that the air supply volume is adjusted. In the case of constant or even increase, the noise is greatly reduced. After repeated experiments, observations, analysis, and comparisons by the inventors, it has been found that, for the cross-flow fan 14, the higher the rotation speed, the greater the noise. When the rotation speed increases to the maximum speed, the air flow accelerates and the vibration increases significantly. The noise generated by the machine will increase geometrically. When the cross-flow fan 14 and the induced draft fan 23 are operated at the low and medium speeds at the same time, the induced draft fan 23 can share the air supply volume for the cross-flow fan 14, thereby greatly reducing the amount of air in the indoor unit of the air conditioner while providing the same air supply volume. The noise generated by the high-speed fan at high speed ensures that the operating performance of the air conditioner is unchanged or even improved. The installation of the air inlet pipe 211 enables the air conditioner indoor unit to introduce outdoor fresh air during operation, ensures the oxygen content of the indoor air, and solves many problems such as turbidity and poor quality of the indoor air. The setting of the purification component 27 enables the air conditioner indoor unit to perform cyclic purification and filtration of the indoor air during operation, effectively filtering pm2.5 and other floating particles in the air, and improving the cleanliness of the indoor air. The setting of the drainage plate 251 makes full use of the Venturi effect. When the air flow passes through the connecting pipe 25, the air pressure is large. The rapid flow of air will cause a negative pressure near the drainage plate 251, and the indoor air flow will follow the drainage. The plate 251 is sucked into the jet flow channel and the air flow is smoothly mixed, so that the airflow can be further increased while the speed of the induced draft fan 23 and the cross-flow fan 14 is maintained, or the induced draft fan 23 can be ensured while the supply airflow is guaranteed. The rotational speed of the cross-flow fan 14 can be further reduced, and the noise can be further reduced. The arc-shaped cross section of the drainage plate 251 reduces the on-line loss during the drainage and the friction loss when mixing with the air flow in the jet channel, which effectively improves the air intake.

In addition, the connecting pipe 25 has a curved surface section and a second end with a bell mouth, so that the air flow discharged from the exhaust port of the induced draft fan 23 can be smoothly transferred into the jet channel, thereby reducing loss along the way. The indoor end of the air inlet pipe 211 is provided with a bell mouth structure, which can make outdoor fresh air enter the casing 21 more smoothly and smoothly, thereby increasing the amount of air drawn by the induced fan 23 and further increasing the amount of air sent. The partition plate 271 seals the induced draft fan 23 in the first chamber formed by the partition plate 271 and the front cover 21a in a manner that is significantly smaller than the area of the front cover 21a, and also allows the first air inlet 212 on the front cover 21a to enter the first chamber. The indoor air of a casing 21 can also be guided to the front of the induced draft fan 23 to ensure the filtering effect. In addition, since the air supply module 2 can be installed outside the body 1 of the existing wall-mounted air-conditioning indoor unit, this also enables the air supply module 2 of the present invention to be sold separately, and the user does not need to spend a higher cost to purchase a new low-noise The air conditioner can be installed outside the main body 1 of the indoor unit of the air conditioner with only a small purchase cost and modification cost, which greatly expands the application scenario of the present invention and is suitable for large-scale promotion and use.

Of course, the above embodiments are only used to explain the principle of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the principle of the present invention, those skilled in the art can adjust the above embodiments so that the present invention can Apply to more specific application scenarios. For example, the cross section of the drainage plate 251 can be set to other straight lines or arcs, as long as the shape can reduce the loss along the course of the drainage; for another example, the supplementary air module 2 may not be provided with the connection pipe 25, but instead The air outlet of the induced draft fan 23 is directly communicated with the second through hole of the main body 1; for another example, the connecting pipe 25 may not have a curved surface section, but may be replaced by a right-angled section, and the second end of the connecting pipe 25 may not be provided with a horn For example, the induced draft fan 23 may also use other axial flow fans or mixed flow fans; for another example, the air inlet pipe 211 and the mounting hole 214 may also be provided at other positions, such as on the top surface of the rear cover 21b. / The lower part, or the front / rear side or bottom surface of the housing 21; for another example, the area of the partition 271 can of course be set to be substantially equal to the area of the front cover 21a, and is snapped on the front cover 21a and Between the rear casing 21b, the first casing 21 is divided into two chambers while the air inlet 212 and the mounting hole 214 are separated.

The wall-mounted air conditioner indoor unit according to the second embodiment of the present invention will be described below with reference to FIGS. 7 and 8. Among them, FIG. 7 is an exploded schematic diagram of the wall-mounted air-conditioning indoor unit in the second embodiment of the present invention; FIG. 8 is a working principle diagram of the wall-mounted air-conditioning indoor unit in the second embodiment of the present invention, Suction process of the fan. As shown in FIG. 7 and FIG. 8, in another possible embodiment, under the condition that other setting modes are not changed, two induced draft fans 23 and two connecting pipes 25 may also be provided in the housing 21, corresponding to Ground, the partition 271 is provided with two filter holes 273, the housing 21 is provided with two first through holes 213, and the body 1 is provided with two second through holes. The induced draft fan 23 is symmetrically disposed in the casing 21. In this way, when the indoor unit is working, the two induced draft fans 23 and the cross-flow fan 14 can achieve the same air supply volume at a smaller rotational speed, thereby further reducing the noise generated by the indoor unit when the air supply volume is large and improving the user. Experience.

The control method of the wall-mounted air conditioner indoor unit according to the present invention is described below with reference to FIG. 9. Among them, FIG. 9 is a flowchart of a method for controlling a wall-mounted air conditioner indoor unit according to the present invention.

As shown in FIG. 9, the control method of the air-conditioning indoor unit of the present invention mainly includes the following steps:

S100. Obtain a set wind speed of the indoor unit. For example, by obtaining the set wind speed from the set parameters when the user selects the operating mode of the air conditioner, or when the wind speed of the indoor unit is set to automatic wind speed, the current operating wind speed is automatically obtained as the set wind speed;

S200. When the set wind speed is greater than the wind speed threshold, the induced draft fan 23 and the cross-flow fan 14 are controlled to run simultaneously at the first set speed and the second set speed, respectively. For example, the wind speed threshold may be the high speed or the wind speed corresponding to the high speed of the cross-flow fan 14 when operating alone. When the set wind speed is greater than the wind speed threshold, the control module of the indoor unit controls the induced draft fan 23 and the cross-flow fan 14 at the same time at low and medium speeds. Start operation to reduce the noise generated by the indoor unit. Those skilled in the art can understand that the low speed is lower than the medium speed, and the medium speed is lower than the high speed. In other words, when the set wind speed of the indoor unit is greater than a preset wind speed threshold, the control module of the indoor unit controls the induced draft fan 23 and the cross-flow fan 14 at the same time at a first set speed and a second set speed that are smaller than the wind speed threshold. Run at the same time.

Finally, it should be noted that although the air-conditioning indoor unit of the present invention is described in conjunction with a wall-mounted air-conditioning indoor unit, it is obvious that the air supply module of the present invention can also be applied to other air-conditioning indoor units, such as a cabinet-type air-conditioning indoor unit.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the accompanying drawings. However, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical solutions after these changes or replacements will fall within the protection scope of the present invention.

Claims

An indoor unit of an air conditioner includes a main body, and a heat exchanger and a blower are arranged in the body, wherein the indoor unit of the air conditioner further includes a supplementary air module, the supplemental air module includes a casing, and the casing is provided with the casing. An air inlet pipe communicating with the outdoor, the housing is provided with a purification component, an induced draft fan and a connecting pipe, a first end of the connecting pipe is connected to an exhaust port of the induced fan, and a second end of the connecting pipe Extending to the air intake side of the heat exchanger, the supplementary air module is arranged to be able to introduce outdoor fresh air into the casing through the air inlet pipe under the driving of the induced draft fan, and make the outdoor fresh air After the air flows through the purification component, the induced draft fan, and the connecting pipe, it is discharged to the air inlet side of the heat exchanger through the second end of the connecting pipe;

A drainage plate is provided on the connection pipe, and the drainage plate can introduce air near the connection pipe into the connection pipe when the induced draft fan works.
The air conditioner indoor unit according to claim 1, wherein a cross section of the air guide plate is an arc shape, and the arc shape can draw the nearby air in a direction toward the second end of the connection pipe.
The air conditioner indoor unit according to claim 2, wherein an air inlet is further provided on the casing at a position close to the drainage plate.
The air conditioner indoor unit according to any one of claims 1 to 3, wherein the housing is provided with a first through hole, the body is provided with a second through hole, and the second end of the connection pipe After passing through the first through hole and the second through hole, it extends to the air inlet side of the heat exchanger.
The air conditioner indoor unit according to claim 4, wherein the connecting pipe has a curved surface section; and / or the second end of the connecting pipe has a bell mouth structure.
The air conditioner indoor unit according to claim 1, wherein the purification component comprises a partition and a filter layer, the partition divides the casing into a first chamber and a second chamber, and the induced draft fan is located at In the first chamber, the filter layer is located in the second chamber, and a filter hole is defined in the partition, and the first chamber and the second chamber are communicated through the filter hole.
The air-conditioning indoor unit according to claim 6, wherein the partition is connected to the housing in a sealed manner.
The air conditioner indoor unit according to claim 1, wherein an end of the air inlet pipe connected to the casing has a bell mouth structure.
The air conditioner indoor unit according to claim 1, wherein the air conditioner indoor unit is a wall-mounted air conditioner indoor unit, and the air supply module is detachably disposed on a back surface of the body.
A control method of an air conditioner indoor unit, wherein the air conditioner indoor unit is the air conditioner indoor unit according to any one of claims 1 to 9, and the control method includes:

Obtaining a set wind speed of the air-conditioning indoor unit;

When the set wind speed is greater than a wind speed threshold, controlling the induced draft fan and the blower to run simultaneously at a first set speed and a second set speed, respectively.