Operating Method, Device, Storage Medium and Air Conditioner Indoor Unit of Fan Assembly

Abstract

The present invention discloses an operating method, device, storage medium and air conditioner indoor unit for a fan assembly. The fan assembly includes a cross-flow impeller and an axial-flow impeller serially arranged in the air flow direction of the air conditioner indoor unit. The operating method of the fan assembly includes: controlling a first motor to drive the cross-flow impeller to rotate at a preset speed; obtaining an initial air volume; determining a compensation air volume according to the initial air volume and a target air volume; determining a target speed of the axial-flow impeller according to the compensation air volume; and controlling a second motor to drive the axial-flow impeller to rotate at the target speed. The operating method disclosed by the present invention can determine the target speed of the axial-flow impeller according to the actual installation conditions of the air conditioner indoor unit, and control the axial-flow impeller to rotate according to the target speed, so that the actual air volume of the air conditioner indoor unit reaches the target air volume, thereby ensuring that the air volume of the air conditioner indoor unit is constant under different installation conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and particularly to an operating method, device, storage medium and air conditioner indoor unit of a fan assembly. Background Art

[0002] Duct-type air conditioner indoor units usually adopt centrifugal fans or cross-flow fans. For an air conditioner indoor unit adopting a cross-flow fan, indoor air enters the heat exchange air duct from the air inlet of the air conditioner indoor unit, and is blown towards the heat exchanger under the action of the cross-flow fan. After heat exchange through the heat exchanger, heat exchange air is formed and then blown out from the air outlet to the room to achieve indoor temperature adjustment.

[0003] However, the cross-flow fan has a weak static pressure capacity. Usually, only an air outlet panel can be matched at the air outlet of the air conditioner indoor unit, and an external air duct cannot be connected, so that the position of the end air outlet of the air conditioner indoor unit cannot be adjusted according to the actual needs of customers. Summary of the Invention

[0004] The main object of the present invention is to provide an operating method, device, storage medium and air conditioner indoor unit of a fan assembly, aiming to solve the technical problem that the position of the end air outlet of a duct-type air conditioner indoor unit adopting a cross-flow fan cannot be adjusted according to actual needs.

[0005] To achieve the above object, the present invention provides an operating method of a fan assembly of an air conditioner indoor unit, and the operating method of the fan assembly includes:

[0006] Controlling the first motor to drive the cross-flow fan to rotate at a preset speed;

[0007] Obtaining an initial air volume, where the initial air volume is the actual air volume of the air conditioner indoor unit when the cross-flow fan rotates at the preset speed and the output power of the second motor is zero;

[0008] Determining a compensated air volume according to the initial air volume and a target air volume, where the target air volume is the air volume that the air conditioner indoor unit should achieve when the cross-flow fan rotates at the preset speed;

[0009] Determining a target speed of the axial-flow fan according to the compensated air volume;

[0010] Controlling the second motor to drive the axial-flow fan to rotate at the target speed.

[0011] In an embodiment, the step of obtaining the initial air volume includes:

[0012] When the cross-flow fan rotates at the preset speed and the output power of the second motor is zero, obtaining an electric induction signal generated in the second motor when the axial-flow fan rotates passively under the action of the wind field of the cross-flow fan;

[0013] Determine the initial air volume according to the electric induction signal and the preset mapping relationship between the electric induction signal and the initial air volume.

[0014] In one embodiment, the step of determining the target rotational speed according to the compensated air volume includes:

[0015] Determine the target rotational speed of the axial flow fan according to the compensated air volume and the preset mapping relationship between the rotational speed of the axial flow fan and the compensated air volume.

[0016] In one embodiment, after the step of determining the target rotational speed of the axial flow fan according to the compensated air volume and before the step of controlling the second motor to drive the axial flow fan to rotate at the target rotational speed, it includes:

[0017] Store the target rotational speed.

[0018] To achieve the above object, the present invention further provides a control device, including a memory, a processor, and a fan assembly operation program stored on the memory and executable by the processor. When the fan assembly operation program is executed by the processor, the steps of the above-mentioned fan assembly operation method are implemented.

[0019] To achieve the above object, the present invention further provides a storage medium, on which a fan assembly operation program is stored. When the fan assembly operation program is executed by a processor, the steps of the above-mentioned fan assembly operation method are implemented.

[0020] To achieve the above object, the present invention further provides an air conditioner indoor unit, including:

[0021] A housing, the housing is formed with an air inlet, an air outlet, and a heat exchange air duct connecting the air inlet and the air outlet;

[0022] A fan assembly, including a cross-flow fan and an axial flow fan. The cross-flow fan includes a cross-flow impeller disposed in the heat exchange air duct and a first motor for driving the cross-flow impeller. The axial flow fan includes at least one axial flow impeller disposed in the heat exchange air duct and a second motor for driving each axial flow impeller. The cross-flow impeller and at least one of the axial flow impellers are serially arranged in the air flow direction of the heat exchange air duct.

[0023] In one embodiment, the air conditioner indoor unit further includes a control device, and the control device controls the fan assembly to operate according to the following steps:

[0024] Control the first motor to drive the cross-flow impeller to rotate at a preset rotational speed;

[0025] Obtain the initial air volume, where the initial air volume is the actual air volume of the air conditioner indoor unit when the cross-flow impeller rotates at the preset speed and the output power of the second motor is zero;

[0026] Determine the compensation air volume according to the initial air volume and the target air volume, where the target air volume is the air volume that the air conditioner indoor unit should achieve when the cross-flow impeller rotates at the preset speed;

[0027] Determine the target speed of the axial-flow impeller according to the compensation air volume;

[0028] Control the second motor to drive the axial-flow impeller to rotate at the target speed.

[0029] In one embodiment, the step of obtaining the initial air volume includes:

[0030] When the cross-flow impeller rotates at the preset speed and the output power of the second motor is zero, obtain the electrical induction signal generated in the second motor when the axial-flow impeller rotates passively under the action of the wind field of the cross-flow impeller;

[0031] Determine the initial air volume according to the electrical induction signal and the preset mapping relationship between the electrical induction signal and the initial air volume.

[0032] In one embodiment, the step of determining the target speed according to the compensation air volume includes:

[0033] Determine the target speed of the axial-flow impeller according to the compensation air volume and the preset mapping relationship between the axial-flow impeller speed and the compensation air volume.

[0034] In one embodiment, after the step of determining the target speed of the axial-flow impeller according to the compensation air volume and before the step of controlling the second motor to drive the axial-flow impeller to rotate at the target speed, it includes:

[0035] Store the target speed.

[0036] In one embodiment, the air conditioner indoor unit further includes a heat exchange component disposed in the heat exchange air duct, and the heat exchange component is located upstream of the cross-flow impeller and at least one of the axial-flow impellers in the air flow direction.

[0037] In one embodiment, there are multiple axial-flow impellers, and the multiple axial-flow impellers are adjacent to each other in sequence along the axial direction of the cross-flow impeller.

[0038] In one embodiment, the axial flow wind wheels are provided in plurality, and among the plurality of the axial flow wind wheels, in the axial direction of the cross-flow wind wheel, at least two adjacent axial flow wind wheels are spaced apart, and a gap size between each two adjacent and spaced apart axial flow wind wheels is less than or equal to a diameter of any one of the axial flow wind wheels.

[0039] In one embodiment, the air conditioner indoor unit further includes an air duct, and the air duct is connected to the air outlet side of the air outlet.

[0040] In one embodiment, the axial flow wind wheel is located on the downstream side of the cross flow wind wheel in the air flow direction.

[0041] In one embodiment, the shell includes a top wall and a bottom wall separated in the upper and lower directions, and a side wall extending between the top wall and the bottom wall, the top wall, the bottom wall and the side wall together enclose the heat exchange air duct, the side wall includes a front side wall located on the air outlet side of the shell, the air inlet is formed on the bottom wall, and the air outlet is formed on the front side wall.

[0042] In one embodiment, the fan assembly also includes a volute disposed in the shell, the volute having an air inlet end and an air outlet end, the crossflow wind wheel is disposed at the air inlet end, the air outlet end is connected to the air inlet side of the air outlet, and the axial flow wind wheel is disposed at the air outlet.

[0043] In one embodiment, the air inlet includes a first air inlet and a second air inlet, the crossflow wind wheel is located between the first air inlet and the second air inlet in the horizontal direction, and the heat exchange assembly includes a first heat exchanger and a second heat exchanger which are separated and arranged in sequence along the horizontal direction, the first heat exchanger is located between the first air inlet and the crossflow wind wheel in the horizontal direction, and the second heat exchanger is located between the crossflow wind wheel and the second air inlet in the horizontal direction.

[0044] In one embodiment, the second heat exchanger includes a first heat exchange unit and a second heat exchange unit arranged in sequence along the up and down direction, the upper end of the first heat exchange unit is connected to the top wall, the lower end of the second heat exchange unit is supported on the bottom wall, the first heat exchange unit and the second heat exchange unit form an angle, and the angle is toward the cross-flow impeller.

[0045] In one embodiment, the air-conditioning indoor unit is a ducted air-conditioning indoor unit.

[0046] The present invention provides an operating method for a fan assembly. The fan assembly includes a cross-flow fan and an axial-flow fan. The cross-flow fan includes a cross-flow impeller and a first motor, and the axial-flow fan includes an axial-flow impeller and a second motor. The cross-flow impeller and the axial-flow impeller are serially arranged in the air flow direction of the air conditioner indoor unit. The operating method of the fan assembly includes: controlling the first motor to drive the cross-flow impeller to rotate at a preset speed; obtaining an initial air volume; determining a compensation air volume according to the initial air volume and a target air volume; determining a target speed of the axial-flow impeller according to the compensation air volume; and controlling the second motor to drive the axial-flow impeller to rotate at the target speed. In the embodiment provided by the present invention, the fan assembly can increase the static pressure of the air conditioner indoor unit, so that the air outlet of the air conditioner indoor unit can be externally connected with an air duct, thereby adjusting the orientation of the end air outlet of the air conditioner indoor unit according to actual needs.

[0047] According to the operating method of the fan assembly provided by the present invention, after the air conditioner indoor unit is installed, debugging is first performed. Specifically, the first motor is turned on and the second motor is turned off to obtain the initial air volume of the air conditioner indoor unit, and a preset target air volume is determined. The compensation air volume that the axial-flow impeller needs to provide is determined according to the initial air volume and the target air volume. Thus, when the first motor drives the cross-flow impeller to rotate at the preset speed during the normal operation of the air conditioner indoor unit, the second motor is controlled to drive the axial-flow impeller to rotate at the target speed, so that the actual air volume of the air conditioner indoor unit reaches the target air volume, thereby ensuring that the air volume of the air conditioner indoor unit is basically constant at the same gear under different installation conditions and meeting the use requirements.

[0048] The present invention also provides an air conditioner indoor unit, which includes a housing, a fan assembly and a heat exchange assembly. The housing is formed with an air inlet, an air outlet and a heat exchange air duct connecting the air inlet and the air outlet. The fan assembly is arranged in the heat exchange air duct and includes a cross-flow impeller and an axial-flow impeller. The cross-flow impeller and the axial-flow impeller are serially arranged in the air flow direction of the heat exchange air duct. In the embodiment provided by the present invention, the fan assembly of the air conditioner indoor unit increases the static pressure through the serial arrangement of the cross-flow impeller and the axial-flow impeller, so that the air outlet of the air conditioner indoor unit can be externally connected with an air duct, thereby being able to select a suitable orientation for the end air outlet of the air conditioner indoor unit according to the actual needs of customers, and having better versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic three-dimensional structure diagram of an embodiment of an air conditioner indoor unit according to the embodiment of the present invention;

[0050] Figure 2 is Figure 1 the front view of the front side of the air conditioner indoor unit in

[0051] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0052] Figure 4 is Figure 1 a schematic three-dimensional structure diagram of the internal components of a central air conditioner indoor unit;

[0053] Figure 5 is Figure 4 a schematic three-dimensional structure diagram of the internal components of the central air conditioner indoor unit from another perspective;

[0054] Figure 6 is Figure 1 a schematic diagram of the air flow transportation of the central air conditioner indoor unit;

[0055] Figure 7 is a schematic diagram of the air flow transportation of another embodiment of the invention embodiment scheme related to the central air conditioner indoor unit;

[0056] Figure 8 is a schematic diagram of the structure of the control device of the hardware operating environment involved in the invention embodiment scheme;

[0057] Figure 9 is a schematic flowchart of the first embodiment of the operation method of the blower assembly of the present invention;

[0058] Figure 10 is a schematic flowchart of the second embodiment of the operation method of the blower assembly of the present invention;

[0059] Figure 11 is a schematic flowchart of the third embodiment of the operation method of the blower assembly of the present invention;

[0060] Figure 12 is a schematic flowchart of the fourth embodiment of the operation method of the blower assembly of the present invention.

[0061] Explanation of the reference numerals in the drawings:

[0062] Reference numeral Name Reference numeral Name 100 Air conditioner indoor unit 21 Cross-flow impeller 10 Housing 22 Axial-flow impeller 11 Air inlet 23 Volute 111 First air inlet 231 Air inlet end 112 Second air inlet 232 Air outlet end 12 Air outlet 30 Heat exchange component 13 Heat exchange air duct 31 First heat exchanger 101 Top wall 32 Second heat exchanger 102 Bottom wall 321 First heat exchange unit 103 Front side wall 322 Second heat exchange unit 1001 Processor 40 Water receiving tray 1002 Communication bus 1004 Network interface 1003 User interface 1005 Memory

[0063] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0064] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0065] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0066] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0067] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When there are, they are not within the protection scope required by the present invention.

[0068] The present invention provides an air conditioner indoor unit 100 including a blower assembly. Specifically, the air conditioner indoor unit 100 can be a duct type air conditioner indoor unit. For example, it can be a duct fan or an embedded air conditioner indoor unit in a central air conditioner.

[0069] Duct type air conditioner indoor units usually adopt centrifugal fans or cross-flow fans. For the air conditioner indoor unit 100 with a cross-flow fan, due to the weak static pressure capacity of the cross-flow fan, it cannot meet the external air duct. Therefore, usually, only a panel can be used at the air outlet 12 of the air conditioner indoor unit 100, and the external air duct cannot be connected according to the actual needs of users, and it is impossible to flexibly select a suitable air outlet position at the end of the air conditioner indoor unit 100 indoors. This results in poor applicability of the air conditioner indoor unit 100.

[0070] For this reason, please refer to Figures 1 to 7 , the present invention provides an air conditioner indoor unit 100, including a housing 10, a blower assembly and a heat exchange assembly 30. The housing is formed with an air inlet 11, an air outlet 12 and a heat exchange air duct 13 connecting the air inlet 11 and the air outlet 12. The heat exchange assembly 30 is arranged in the heat exchange air duct 13.

[0071] In this embodiment, please continue to refer to Figures 3 to 5, the fan assembly specifically includes a cross-flow fan and an axial-flow fan. The cross-flow fan includes a cross-flow impeller 21 and a first motor drivingly connected to the cross-flow impeller 21. The first motor is used to drive the cross-flow impeller 21 to rotate. The axial-flow fan includes at least one axial-flow impeller 22 and a second motor drivingly connected to each axial-flow impeller 22. The second motor is used to drive each axial-flow impeller 22 to rotate. It should be noted that when the fan assembly specifically includes multiple axial-flow impellers 22, multiple second motors can be correspondingly provided, and the multiple second motors drive the multiple axial-flow impellers 22 to rotate synchronously or at least partially. One second motor can also be provided. One second motor is drivingly connected to the multiple axial-flow impellers 22 through a transmission component to drive the multiple axial-flow impellers 22 to rotate synchronously. Please refer to Figure 6 and Figure 7 , the cross-flow impeller 21 and at least one axial-flow impeller 22 are arranged in the heat exchange air duct 13, and the cross-flow impeller 21 and at least one axial-flow impeller 22 are arranged in series in the air flow direction of the air conditioner indoor unit.

[0072] It should be noted that in the present invention, the air flow direction of the air conditioner indoor unit 100 refers to the flow path of the air flow in the heat exchange air duct 13 of the air conditioner indoor unit 100 under the driving action of the fan assembly. Specifically, under the driving of the fan assembly, the air flow flows into the heat exchange air duct 13 from the air inlet 11, flows through the heat exchange assembly 30, and after heat exchange, forms a heat exchange air flow flowing towards the air outlet 12. The heat exchange air flow is sent to the room to realize the temperature adjustment of the indoor air. It can be understood that the specific flow direction of the air flow direction can be tortuous, which is determined by factors such as the setting positions of the air inlet 11 and the air outlet 12 on the housing 10, the specific shape of the heat exchange air duct 13, and the specific arrangement orientation of the cross-flow impeller 21 and at least one axial-flow impeller 22.

[0073] Furthermore, the cross-flow impeller 21 and at least one axial-flow impeller 22 being arranged in series in the air flow direction of the air conditioner indoor unit 100 can specifically be that the cross-flow impeller 21 is arranged on the upstream side of the axial-flow impeller 22 in the air flow direction, and the air flow first flows through the cross-flow impeller 21 and then through the axial-flow impeller 22. It can also be that the cross-flow impeller 21 is arranged on the downstream side of the axial-flow impeller 22 in the air flow direction, and the air flow first flows through the axial-flow impeller 22 and then through the cross-flow impeller 21. It can also be that when multiple axial-flow impellers 22 are provided, some axial-flow impellers 22 are located on the upstream side of the cross-flow impeller 21 in the air flow direction, and some other axial-flow impellers 22 are located on the downstream side of the cross-flow impeller 21 in the air flow direction. The air flow first flows through some axial-flow impellers 22, then through the cross-flow impeller 21, and then through some other axial-flow impellers 22. In short, the cross-flow impeller 21 and at least one axial-flow impeller 22 are arranged in series, enhancing the static pressure capacity of the fan assembly.

[0074] The heat exchange component 30 can be disposed on the upstream side of the cross-flow impeller 21 and at least one axial-flow impeller 22 in the air flow direction, can be disposed between the cross-flow impeller 21 and at least one axial-flow impeller 22, or can also be disposed on the downstream side of the cross-flow impeller 21 and at least one axial-flow impeller 22. It can be understood that in order to reduce wind loss and enable the axial-flow fan to better enhance the static pressure, it is best for the heat exchange component 30, the cross-flow impeller 21, and at least one axial-flow impeller 22 to be arranged in sequence in the air flow direction. Such an arrangement results in less wind loss in the heat exchange air duct 13, enables the air flow to flow more smoothly, and better enhances the static pressure capacity of the air conditioner indoor unit 100.

[0075] In this embodiment, since the cross-flow impeller 21 and at least one axial-flow impeller 22 are serially arranged in the air flow direction of the heat exchange air duct 13 of the air conditioner indoor unit 100, if the cross-flow impeller 21 and the axial-flow impeller 22 rotate actively at the same time, the static pressure capacity of the fan assembly will be enhanced. For example, when the air conditioner indoor unit 100 is installed, if, according to the actual installation requirements, an air duct is externally connected to the air outlet 12 of the air conditioner indoor unit 100, resulting in an increase in the static pressure required by the fan assembly. When the air conditioner indoor unit 100 is operating normally, the first motor and the second motor are turned on simultaneously, and the cross-flow impeller 21 and at least one axial-flow impeller 22 rotate actively at the same time, which increases the static pressure of the fan assembly, enabling the air conditioner indoor unit 100 to supply air normally and ensuring the air volume at the air outlet end. It can be understood that when the air conditioner indoor unit 100 is installed, if there is no need to externally connect an air duct to the air outlet 12, but a standard air outlet panel is directly installed at the air outlet 12, when the air conditioner indoor unit 100 is operating normally, either the first motor and the second motor can be turned on simultaneously to drive the cross-flow impeller 21 and at least one axial-flow impeller 22 to rotate actively at the same time, or only the first motor may be turned on to drive the cross-flow impeller 21 to rotate actively, and the axial-flow impeller 22 rotates passively under the action of the air flow field of the cross-flow impeller 21 to achieve normal air supply of the air conditioner indoor unit 100.

[0076] In the embodiment provided by the present invention, the fan assembly of the air conditioner indoor unit 100 increases the static pressure through the settings of the cross-flow impeller 21 and the axial-flow impeller 22, enabling the air outlet 12 of the air conditioner indoor unit 100 to be externally connected with an air duct, so that the orientation of the air outlet 12 at the end of the air conditioner indoor unit 100 can be selected according to the actual needs of customers, and the versatility is better.

[0077] In one embodiment, the heat exchange assembly 30 is on the upstream side of at least one of the axial flow fan 22 and the cross-flow fan 21 in the air flow direction of the heat exchange air duct 13, that is, located between the air inlet 11 and the cross-flow fan 21 and the axial flow fan 22. In this embodiment, the heat exchange assembly 30 is located on the air inlet side of the fan assembly in the air flow direction of the heat exchange air duct 13, avoiding the air flow passing through the cross-flow fan 21 or the axial flow fan 22 and then passing through the heat exchange assembly 30, resulting in an increase in wind loss, which has an adverse effect on the static pressure capacity of the fan assembly and causes the inability to offset the increase in static pressure brought by the external air duct.

[0078] Preferably, please refer to Figure 3 , at least one axial flow fan 22 is located on the downstream side of the cross-flow fan 21 in the air flow direction of the heat exchange air duct 13. In this way, in the air flow direction of the heat exchange air duct 13, the heat exchange assembly 30, the cross-flow fan 21, and at least one axial flow fan 22 are arranged in series in sequence. Such an arrangement can further reduce the wind loss brought by the heat exchange assembly 30 and enhance the static pressure capacity of the fan assembly. The components in the heat exchange air duct 13 of the air conditioner indoor unit 100 are more reasonably distributed, improving the static pressure resistance of the air conditioner indoor unit 100 and meeting the requirements of the external air duct of the air conditioner indoor unit 100. Thus, when installing the ducted air conditioner indoor unit 100, the orientation of the actual air outlet end of the air conditioner indoor unit 100 can be selected according to actual needs, meeting the installation and use requirements of different customers.

[0079] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 5 , in this embodiment, there are multiple axial flow fans 22, and the multiple axial flow fans 22 are arranged along the axial direction of the cross-flow fan 21. In this way, when the size of the axial flow fan 22 is limited by the shape and size of the air conditioner indoor unit 100 and cannot be set to a larger size, resulting in insufficient static pressure enhancement capacity of a single axial flow fan 22, a sufficient number of axial flow fans 22 are provided to enhance the static pressure resistance of the fan assembly, thus meeting the actual static pressure requirements of the air conditioner indoor unit. At the same time, the multiple axial flow fans 22 are arranged along the axial direction of the cross-flow fan 21, making the overall structure of the fan assembly more compact, occupying less space, and meeting the requirements of the external shape size of the general ducted air conditioner indoor unit 100.

[0080] It can be understood that since the duct type air conditioner indoor unit 100 is generally small in size in the up and down direction and is generally arranged in a relatively thin box shape to facilitate embedding in the room ceiling. Therefore, in the duct type air conditioner indoor unit 100, the axial direction of the cross-flow fan 21 usually extends along the horizontal direction to reduce the overall height of the air conditioner indoor unit 100, so that the air conditioner indoor unit 100 can be embedded in the ceiling of the indoor room, which is beautiful and practical, and avoids occupying too much indoor floor height, improving the comfort of the indoor user experience. At this time, multiple axial flow fans 22 are also arranged horizontally, and preferably the axial flow fans 22 are arranged on the air outlet side of the cross-flow fan 21. On the one hand, the arrangement of the multiple axial flow fans 22 reduces the occupied volume of the fan assembly, making the overall structure of the air conditioner indoor unit 100 more compact. On the other hand, when the air flow speed at the axial flow fan 22 is less than the air flow speed at the air outlet side of the cross-flow fan 21, the multiple axial flow fans 22 play a role in dispersing the heat exchange air flow provided by the cross-flow fan 21, so that to a certain extent, the air outlet of the air conditioner indoor unit is more dispersed, achieving a certain effect of draft-free air outlet.

[0081] Furthermore, the multiple axial flow fans 22 are sequentially adjacent along the axial direction of the cross-flow fan 21. That is, in the axial direction of the cross-flow fan 21, the air guide rings of two adjacent axial flow fans 22 are arranged closely to each other. In this way, as many axial flow fans 22 as possible are arranged in a limited space to achieve the purpose of increasing the air volume of the air conditioner indoor unit. And when the air conditioner indoor unit 100 is externally connected to an air duct, the size of the air duct does not need to be set too wide to cover the overall range of the axial flow fans 22, achieving the purpose of reducing the size of the air duct, reducing costs and reducing the occupation of indoor space.

[0082] In another embodiment, please refer to Figure 2, among the multiple axial flow wind wheels 22, at least two adjacent axial flow wind wheels 22 are arranged at intervals in the axial direction of the cross flow wind wheel 21, and the gap size between the two adjacent and spaced axial flow wind wheels 22 is less than or equal to the diameter of any one of the axial flow wind wheels 22. In this embodiment, the gap size between the two axial flow wind wheels 22 is the distance L between the outer peripheries of the air guide rings of the two axial flow wind wheels 22 spaced in the axial direction of the cross flow wind wheel 21, and the diameter of the axial flow wind wheel 22 refers to the outer diameter D of the air guide ring of the axial flow wind wheel 22. In this embodiment, L is less than or equal to D, so as to ensure that the spacing between the axial flow wind wheels 22 is within a certain range, and avoid the reduction of the air output of the air conditioner indoor unit 100 due to the excessive spacing between the two axial flow wind wheels 22. It can be understood that in this embodiment, multiple axial flow wind wheels 22 can be arranged according to actual needs, so that the overall distribution range of the axial flow wind wheels 22 is compatible with the shape and size of the air outlet 12 of the air conditioner indoor unit 100 or the external air duct. For example, when the number of axial flow wind wheels 22 required is small and the size of the air outlet 12 of the air conditioner indoor unit 100 is larger than the overall size of the multiple axial flow wind wheels 22, in order to make the air outlet more uniform, the multiple axial flow wind wheels 22 can be arranged evenly at intervals. At the same time, in order to avoid the reduction of the air outlet volume of the air conditioner indoor unit 100 due to the excessive spacing between the two axial flow wind wheels 22, the spacing L between each two adjacent axial flow wind wheels 22 should be less than the outer diameter D of the air guide ring of the axial flow wind wheel 22.

[0083] In one embodiment, the air conditioning indoor unit 100 may further include an air duct (not shown in the figure), which is connected to the air outlet side of the air outlet 12 of the air conditioning indoor unit 100. The air outlet end of the air duct can be installed indoors according to actual needs, thereby adjusting the actual position and air outlet direction of the air outlet end of the air conditioning indoor unit 100 to meet the actual installation and usage requirements of different users.

[0084] For further information, please refer to Figure 3 The shell includes a top wall 101 and a bottom wall 102 separated in the upper and lower directions, and a side wall extending between the top wall 101 and the bottom wall 102. The top wall 101, the bottom wall 102 and the side wall together enclose a heat exchange air duct 13. The side wall includes a front side wall 103 located on the air outlet side of the shell. An air inlet 11 is formed on the bottom wall 102, and an air outlet 12 is formed on the front side wall 103.

[0085] It should be noted that in the present invention, the up-down direction and the front-back direction refer to the orientations corresponding to the air conditioner indoor unit 100 after it is installed indoors, and do not include the orientations corresponding to the air conditioner indoor unit 100 during production, assembly, or transportation. Among them, the up-down direction is generally parallel to the extension direction of gravity, and the front-back direction is generally parallel to the horizontal direction. The front and back sides of the air conditioner indoor unit 100 are determined according to the air outlet direction of the housing 10 of the air conditioner indoor unit 100 when the air conditioner indoor unit 100 is installed and in normal use (note: it is not the air outlet direction of the air outlet end of the air conditioner indoor unit 100, but the direction corresponding to the airflow flowing out of the heat exchange air duct 13 in the housing 10). Specifically, the air outlet side on the housing 10 of the air conditioner indoor unit 100 corresponds to the front side of the air conditioner indoor unit 100, and the side opposite to the front side on the housing 10 is the back side. The extension direction between the front side and the back side of the air conditioner indoor unit 100 is the front-back direction of the air conditioner indoor unit 100.

[0086] In this embodiment, the housing 10 of the air conditioner indoor unit 100 is generally box-shaped, and thus has a top wall 101 and a bottom wall 102 that are separately provided in the up-down direction, and side walls that extend between the top wall 101 and the bottom wall 102. The top wall 101, the bottom wall 102, and the side walls together enclose to form a heat exchange air duct 13. The heat exchange air duct 13 houses a cross-flow impeller 21 and at least one axial-flow impeller in the fan assembly, as well as a heat exchange assembly 30. It can be understood that the first motor 21 for driving the cross-flow impeller in the fan assembly and the second motor 22 for driving each axial-flow impeller can be provided inside the heat exchange air duct 13 or outside the heat exchange air duct 13 to avoid occupying the heat exchange air duct 13.

[0087] The housing 10 has a front side wall 103 located on the front side of the housing 10. In this embodiment, an air inlet 11 is formed on the bottom wall 102 of the housing, and an air outlet 12 is formed on the front side wall 103 of the housing, so that the air conditioner indoor unit 100 takes in air from the lower side and blows out air from the front side, meeting the installation requirements of a general embedded duct air conditioner indoor unit 100, with a relatively long air supply distance and not directly blowing on people, providing a more comfortable user experience.

[0088] Preferably, the fan assembly further includes a volute 23. The volute 23 is provided in the heat exchange air duct 13 and generally extends from the back to the front to form a flow path for guiding the airflow inside the volute. It can be understood that this flow path is part of the heat exchange air duct 13. The volute 23 has an air inlet end 231 and an air outlet end 232. The cross-flow impeller 21 is provided at the air inlet end 231. The air outlet end 232 of the volute 23 is connected to the air inlet side of the air outlet 12, and the axial-flow impeller 22 is provided at the air outlet 12.

[0089] In this embodiment, the fan assembly includes a volute 23 provided in the heat exchange air duct 13, and the structure of the volute 23 is as Figure 3As shown, a flow channel extending from the back to the front in the air supply direction is formed in the volute 23, and the shape of the volute 23 should be compatible with the crossflow fan 21. The crossflow fan 21 is arranged at the air inlet end 231 of the volute 23, and the axial flow fan 22 is arranged at the air outlet 12 of the shell 10, so that the crossflow fan 21 and the axial flow fan 22 are arranged in sequence in the transmission direction of the airflow, and the volute 23 plays a role in gathering the airflow inhaled by the crossflow fan 21, reducing wind loss, so that the airflow flows smoothly to the axial flow fan 22 at the rear end of the volute. At the same time, the air outlet end of the volute 23 is connected to the air inlet side of the air outlet 12 on the shell, so that after the heat exchange air flow is sucked into the flow channel under the action of the cross-flow wind wheel 21, it directly flows out of the air outlet 12 through the axial flow wind wheel 22 at the air outlet end 232 of the volute 23. The wind resistance is small and the air outlet is smooth. At the same time, the internal structure of the air-conditioning indoor unit 100 is compact and the layout is reasonable, which reduces the overall size of the air-conditioning indoor unit 100.

[0090] In one embodiment, see Figure 7 The air inlet 11 is located behind the crossflow impeller 21 in the horizontal direction, and the heat exchange assembly 30 is located between the crossflow impeller 21 and the air inlet 11 in the front-to-back direction and is bent toward the crossflow impeller 21 .

[0091] In this example, see Figure 7 The dotted arrow in the figure indicates the direction of air flow. The indoor air flows into the heat exchange duct 13 through the air inlet 11, flows through the heat exchange assembly 30, is sucked into the flow channel in the volute 23 by the crossflow impeller 21, flows along the flow channel in the volute 23 to the axial flow impeller 22, and finally flows out from the air outlet 12 of the air conditioner indoor unit 100. The air flow direction is arranged reasonably and the wind resistance is small. At the same time, the heat exchange assembly 30 is located between the crossflow impeller 21 and the air inlet 11, and is bent toward the crossflow impeller 21 to increase the heat exchange area of the heat exchange assembly 30, improve the heat exchange efficiency, and enhance the heat exchange effect of the air conditioner indoor unit 100.

[0092] In another embodiment, see Figure 3 and Figure 6 The air inlet 11 includes a first air inlet 111 and a second air inlet 112. Specifically, the first air inlet 111 and the second air inlet 112 are arranged in sequence along the front-to-back direction. The crossflow impeller 21 is located between the first air inlet 111 and the second air inlet 112 in the horizontal direction. The heat exchange component 30 includes a first heat exchanger 31 and a second heat exchanger 32 which are separated and arranged in sequence along the horizontal direction. The first heat exchanger 31 is located between the first air inlet 111 and the crossflow impeller 21 in the horizontal direction, and is located below the volute 23, that is, between the front side of the crossflow impeller 21 and the first air inlet 111. The second heat exchanger 32 is located between the crossflow impeller 21 and the second air inlet 112 in the horizontal direction, that is, between the rear side of the crossflow impeller 21 and the second air inlet 112.

[0093] In this example, seeFigure 6 , the dashed arrows in the figure indicate the air flow direction. As shown in the figure, a part of the indoor air flow enters the heat exchange air duct 13 through the first air inlet 111, flows through the first heat exchanger 31, and is then sucked into the flow path in the volute 23 by the cross-flow impeller 21. Another part of the air flow enters the heat exchange air duct 13 through the second air inlet 112, flows through the second heat exchanger 32, and is then sucked into the flow path in the volute 23 by the cross-flow impeller 21. The two parts of the air flow jointly flow from back to front along the extension direction of the volute 23 towards the axial-flow impeller 22, and finally flow out from the air outlet 12 of the air conditioner indoor unit. The air flow direction is reasonably arranged with small air resistance. At the same time, through the decentralized arrangement of the two air inlets 11 and the two heat exchangers, the air inlet area and the layout space of the heat exchange assembly 30 are increased, thereby improving the air volume of the air conditioner indoor unit and increasing the heat exchange area to improve the heat exchange efficiency.

[0094] Further, please refer to Figure 3 , the second heat exchanger 32 includes a first heat exchange unit 321 and a second heat exchange unit 322 arranged in sequence in the up-down direction. The upper end of the first heat exchange unit 321 is connected to the top wall 101, the lower end of the second heat exchange unit 322 is supported on the bottom wall 102, and an included angle is formed between the first heat exchange unit 321 and the second heat exchange unit 322, and the included angle faces the cross-flow impeller 21.

[0095] In this embodiment, the first heat exchange unit 321 and the second heat exchange unit 322 may specifically be both plate-shaped. The lower end of the first heat exchange unit 321 is connected to the upper end of the second heat exchange unit 322. The second heat exchange unit 322 may specifically be fixed by a water receiving tray 40 provided on the upper side of the bottom wall 2 of the housing, so as to be supported on the bottom wall 2. The first heat exchange unit 321 and the second heat exchange unit 322 are bent relative to each other to form an included angle therebetween, and the opening side of the included angle between the two faces the cross-flow impeller 21, thereby increasing the heat exchange area of the second heat exchanger 32 and improving the heat exchange efficiency of the air conditioner indoor unit. The overall layout of the heat exchanger 30 is reasonable and occupies a small space.

[0096] The air conditioner indoor unit 100 proposed by the present invention may vary in terms of whether an air duct or a standard panel is externally connected to the air outlet 12 of the air conditioner indoor unit 100 during installation, or when an air duct is externally connected, whether there are differences in the shape and size of the corresponding air duct, the specific position and air outlet direction of the air outlet end of the air conditioner indoor unit 100, all of which may be different according to actual installation requirements. If the fan assembly controls the operation of the first motor and / or the second motor at the same power in various situations, driving the cross-flow impeller 21 or the axial-flow impeller 22 to rotate at the same speed, it will cause the actual air volume at the end of the air conditioner indoor unit 100 to change when the installation conditions change, resulting in the non-constancy of the actual air volume at the air outlet end of the air conditioner indoor unit 100, affecting the heat exchange efficiency of the air conditioner indoor unit 100, and further making it impossible to guarantee the ability of the air conditioner indoor unit 100 to adjust the room temperature, resulting in a poor user experience. Therefore, it is necessary to provide an operation method for the fan assembly of the air conditioner indoor unit 100, which can control the operation of the fan assembly according to the actual installation conditions of the air conditioner indoor unit 100 to ensure the constancy of the actual air volume at the end of the air conditioner indoor unit 100, meet the actual use requirements of the air conditioner indoor unit 100, and improve the user experience.

[0097] Based on the specific embodiments of the above-mentioned air conditioner indoor unit 100, embodiments of an operation method, a control device, and a storage medium for the fan assembly of the air conditioner indoor unit 100 are proposed.

[0098] Refer to Figure 8 , Figure 8 It is a schematic structural diagram of a control device for the hardware operating environment involved in the embodiment solution of the present invention.

[0099] As Figure 8 shown, the control device may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a button, and optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0100] Those skilled in the art can understand that Figure 8 the structural diagram of the control device of the fan assembly shown in

[0101] As Figure 8 shown, in the memory 1005 as a storage medium, an operating system, a network communication module, a user interface module, and a running method program of the fan assembly may be included.

[0102] In Figure 8 the control device shown, the network interface 1004 is mainly used to connect to the server and communicate data with the server; the user interface 1003 is mainly used to connect to the user terminal and communicate data with the terminal; the control device of the present invention calls the running method program of the fan assembly stored in the memory 1005 through the processor 1001, and executes the running method of the fan assembly provided by the embodiments of the present invention.

[0103] Based on the above hardware structure, an embodiment of the running method of the fan assembly of the air conditioner indoor unit 100 of the present invention is proposed.

[0104] Referring to Figure 9 , Figure 9 is a schematic flowchart of the first embodiment of the running method of the fan assembly of the air conditioner indoor unit 100 of the present invention.

[0105] Step S1, control the first motor to drive the cross-flow impeller to rotate at a preset speed.

[0106] It should be noted that the execution subject of this embodiment may be the control device of the fan assembly. The control device of the fan assembly is provided with a running method program of the fan assembly, and may also be other devices that can achieve the same or similar functions. This embodiment does not limit this. In this embodiment, the air conditioner indoor unit 100 is taken as an example for description. A controller may be provided in the air conditioner indoor unit 100, and a running program of the fan assembly is provided on the controller, and the fan assembly can be controlled to run according to the running program of the fan assembly.

[0107] In specific implementation, the fan assembly includes a cross-flow fan and an axial-flow fan. The cross-flow fan includes a cross-flow impeller 21 and a first motor drivingly connected to the cross-flow impeller 21. The first motor is used to drive the cross-flow impeller 21 to rotate. The axial-flow fan includes at least one axial-flow impeller 22 and a second motor drivingly connected to each axial-flow impeller 22. The second motor is used to drive each axial-flow impeller 22 to rotate. The cross-flow impeller 21 and at least one of the axial-flow impellers 22 are serially arranged in the air flow direction of the air conditioner indoor unit 100.

[0108] The cross-flow impeller 21 and at least one axial-flow impeller 22 are arranged in series in the air flow direction of the air conditioner indoor unit 100. Specifically, the cross-flow impeller 21 can be arranged upstream of the axial-flow impeller 22 in the air flow direction, and the air flow first passes through the cross-flow impeller 21 and then through the axial-flow impeller 22. It can also be that the cross-flow impeller 21 is arranged downstream of the axial-flow impeller 22 in the air flow direction, and the air flow first passes through the axial-flow impeller 22 and then through the cross-flow impeller 21. When there are multiple axial-flow impellers 22, some axial-flow impellers 22 are located upstream of the cross-flow impeller 21 in the air flow direction, and some other axial-flow impellers 22 are located downstream of the cross-flow impeller 21 in the air flow direction. The air flow first passes through some axial-flow impellers 22, then through the cross-flow impeller 21, and then through some other axial-flow impellers 22. In short, the cross-flow impeller 21 and at least one axial-flow impeller 22 are arranged in series to enhance the static pressure capacity of the fan assembly.

[0109] It should be noted that in this embodiment, the cross-flow fan and the axial-flow fan can be designed according to the anti-static pressure capacity required by the air conditioner indoor unit 100. By adjusting the rotational speeds of the cross-flow impeller 21 and the axial-flow impeller 22, when the cross-flow impeller 21 and the axial-flow impeller 22 operate at appropriate rotational speeds in each gear, the static pressure capacity of the preset pressure can be achieved. Preferably, the fan assembly is designed to be able to achieve a static pressure capacity of 13 Mpa.

[0110] Step S2, obtaining the initial air output. The initial air output is the actual air output of the air conditioner indoor unit 100 when the cross-flow impeller 21 rotates at the preset rotational speed and the output power of the second motor is zero.

[0111] In this embodiment, the initial air output is the actual air output of the air conditioner indoor unit 100 when the cross-flow impeller 21 rotates at the preset rotational speed and the output power of the second motor is zero. It should be noted that the actual air output of the air conditioner indoor unit 100 here refers to the air output at the air outlet end of the air conditioner indoor unit 100. Here, the air outlet end of the air conditioner indoor unit 100 refers to the actual air outlet position of the air conditioner indoor unit 100 in the room. For example, when an air outlet panel is provided at the air outlet 12 of the air conditioner indoor unit 100, the target air output is the actual air output at the air outlet panel when the air conditioner indoor unit 100 is operating normally. When a duct is externally connected to the air outlet 12 of the air conditioner indoor unit 100, the target air output is the actual air output at the end of the duct when the air conditioner indoor unit 100 is operating normally.

[0112] Specifically, under a certain gear position, the value of the initial air volume can be determined in the following way. After the air conditioner indoor unit 100 is installed, the operation program is first entered. At this time, the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset speed corresponding to this gear position, and the output power of the second motor is controlled to be zero, that is, when the second motor does not work, the rotation speed of the axial-flow impeller 22 is zero, or the axial-flow impeller 22 rotates passively under the action of the air field of the cross-flow impeller 21. At this time, the actual air volume at the air outlet end of the air conditioner indoor unit 100 is the initial air volume corresponding to this gear position.

[0113] Step S3, determine the compensation air volume according to the initial air volume and the target air volume, where the target air volume is the air volume that the air conditioner indoor unit 100 should achieve when the cross-flow impeller 21 rotates at the preset speed.

[0114] It should be noted that the target air volume is the air volume that the air conditioner indoor unit 100 should achieve when the cross-flow impeller 21 rotates at the preset speed, specifically referring to the air volume at the air outlet end of the air conditioner indoor unit 100 when the air conditioner indoor unit 100 is installed and after the fan assembly is debugged and the air conditioner indoor unit 100 is running normally. Here, the air outlet end of the air conditioner indoor unit 100 refers to the actual air outlet position of the air conditioner indoor unit 100 in the room. For example, when an air outlet panel is set at the air outlet 12 of the air conditioner indoor unit 100, the target air volume is the actual air volume at the air outlet panel when the air conditioner indoor unit 100 is running normally. When the air outlet 12 of the air conditioner indoor unit 100 is externally connected to an air duct, the target air volume is the actual air volume at the end of the air duct when the air conditioner indoor unit 100 is running normally.

[0115] In addition, the target air volume should also correspond to the preset speed. In specific implementation, the preset speed and the target air volume can be specifically set by the manufacturer for the air outlet gear positions of the air conditioner indoor unit 100 before leaving the factory. That is, for the same air conditioner indoor unit 100, for its different air outlet gear positions, there can be multiple preset speeds and multiple target air volumes. For example, the air conditioner indoor unit 100 has multiple gears of high, medium, and low air outlets. For the high gear air outlet, the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset high speed, that is, the preset speed, and at the same time, the air outlet end of the air conditioner indoor unit 100 outputs air at the high air volume corresponding to the high speed, that is, the target air volume; for the low gear air outlet, the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset low speed, that is, the preset speed, and at the same time, the air outlet end of the air conditioner indoor unit 100 outputs air at the low air volume corresponding to the low speed, that is, the target air volume.

[0116] Specifically, under a certain gear, the value of the target air volume can be determined in the following manner. When the external static pressure of the air conditioner indoor unit 100 is 0 Mpa, control the first motor to drive the cross-flow impeller 21 to rotate at the preset speed corresponding to this gear, and control the output power of the second motor to be zero. At this time, the air volume at the air outlet 12 of the air conditioner indoor unit 100 is the target air volume corresponding to this gear.

[0117] It can be understood that the initial air volume of the air conditioner indoor unit 100 should be less than or equal to the target air volume. When the initial air volume is less than the target air volume, during the normal operation of the air conditioner indoor unit 100, in order to make the actual air volume at the end of the air conditioner indoor unit 100 reach the target air volume, it is necessary to control the second motor to drive the axial-flow impeller 22 to rotate actively, increase the air volume of the air conditioner indoor unit 100 to make up for the difference between the initial air volume and the target air volume, so as to achieve the effect that the actual air volume at the end of the air conditioner indoor unit 100 is constant under the same gear even if the installation environment outside the air conditioner indoor unit 100 changes.

[0118] In specific implementation, the compensation air volume can be determined according to the comparison result between the initial air volume and the target air volume. In this embodiment, the compensation air volume refers to that during the normal operation of the air conditioner indoor unit 100, the first motor drives the cross-flow impeller 21 to rotate at a preset speed. In order to make the actual air volume at the end of the air conditioner indoor unit 100 reach the target air volume, the second motor may need to drive the axial-flow impeller 22 to rotate, so that the axial-flow impeller 22 provides compensation for the air volume loss caused by the external air duct. At this time, the air volume increment reflected at the actual air outlet end of the air conditioner indoor unit 100 provided by the axial-flow impeller 22 is the compensation air volume that the axial-flow impeller 22 needs to provide.

[0119] It should be noted that according to the definitions of the target air volume and the initial air volume in this embodiment, for the same air conditioner indoor unit 100, the initial air volume should be less than or equal to the target air volume. For example, when there is no need to connect an external air duct to the air outlet 12 of the air conditioner indoor unit 100, the external static pressure of the air conditioner indoor unit 100 may be 0 Mpa. At this time, the initial air volume is equal to the target air volume, and the difference between the initial air volume and the target air volume is zero. That is to say, the compensation air volume that needs to be provided by the active rotation of the axial-flow impeller 22 is also zero.

[0120] When the air outlet 12 of the indoor unit 100 of the air conditioner is externally connected to an air duct, the external static pressure of the indoor unit 100 of the air conditioner is greater than 0 Mpa. At this time, the initial air volume is less than the target air volume. The difference between the initial air volume and the target air volume is the compensation air volume. That is to say, it is necessary for the second motor to drive the axial flow impeller 22 to rotate actively at the target speed to provide the compensation air volume to make up for the difference between the initial air volume and the target air volume, so as to achieve the effect that even if the installation environment outside the indoor unit 100 of the air conditioner changes, at the same gear, the actual air volume at the end of the indoor unit 100 of the air conditioner remains constant.

[0121] Step S4: Determine the target speed of the axial flow impeller according to the compensation air volume.

[0122] It should be noted that in this step, the compensation air volume is not the actual air volume at the axial flow impeller 22 when the indoor unit 100 of the air conditioner is operating normally, but the increased air volume at the air outlet end of the indoor unit 100 of the air conditioner due to the active rotation of the axial flow impeller 22 driven by the axial flow fan, that is, the difference between the target air volume and the initial air volume. In order to achieve the compensation air volume, the target speed of the axial flow impeller 22 needs to consider not only the actual air volume at the axial flow impeller 22 itself, but also the actual air loss of the air duct externally connected to the air outlet 12 of the indoor unit 100 of the air conditioner.

[0123] In this step, when the initial air volume is equal to the target air volume, the target speed is zero. When the initial air volume is less than the target air volume, the compensation air volume is the difference between the two, and the target speed can be determined according to the compensation air volume.

[0124] Step S5: Control the second motor to drive the axial flow impeller 22 to rotate at the target speed.

[0125] In this step, when the indoor unit 100 of the air conditioner is operating normally, according to the actual air outlet gear of the indoor unit 100 of the air conditioner, control the cross-flow impeller 21 to rotate at the preset speed corresponding to this gear, and the axial flow impeller 22 to rotate at the target speed corresponding to this gear. The actual air volume of the indoor unit 100 of the air conditioner reaches the target air volume. Even if the installation environment of the indoor unit 100 of the air conditioner changes and the air outlet air loss is different according to the actual situation, it can still achieve constant air outlet at the same gear and meet the use requirements.

[0126] In this embodiment, the operation method of the fan assembly includes: obtaining a target air output, and obtaining an initial air output; determining a compensation air output according to the initial air output and the target air output; determining a target rotation speed of the axial flow fan according to the compensation air output; when the first motor drives the cross-flow fan to rotate at the preset rotation speed, controlling the second motor to drive the axial flow fan to rotate at the target rotation speed. In the embodiment provided by the present invention, the fan assembly can increase the static pressure, so that the air outlet 12 of the air conditioner indoor unit 100 can be externally connected with an air duct, thereby adjusting the orientation of the end air outlet of the air conditioner indoor unit 100 according to actual needs.

[0127] According to the operation method of the fan assembly provided by the present invention, after the air conditioner indoor unit 100 is installed, debugging is first performed. Specifically, the first motor is turned on and the second motor is turned off, and the first motor is controlled to drive the cross-flow fan 21 to rotate at a preset rotation speed, the initial air output of the air conditioner indoor unit 100 is obtained, and a preset target air output is determined (the target air output is the air output that the air conditioner indoor unit should achieve when the cross-flow fan rotates at the preset rotation speed), and the compensation air output that the axial flow fan 22 needs to provide is determined according to the initial air output and the target air output. Thus, when the first motor drives the cross-flow fan 21 to rotate at the preset rotation speed during the normal operation of the air conditioner indoor unit 100, the second motor is controlled to drive the axial flow fan 22 to rotate at the target rotation speed, so that the actual air output of the air conditioner indoor unit 100 reaches the target air output during normal operation, thereby ensuring that the air output of the air conditioner indoor unit 100 is basically constant at the same gear under different installation conditions and meeting the use requirements.

[0128] Furthermore, it can be understood that the operation method of the fan assembly proposed by the present invention can be applied not only when the air conditioner indoor unit 100 is installed, but also after the air conditioner indoor unit 100 has been used for a period of time. For example, after the air conditioner indoor unit 100 has been used for a period of time, due to factors such as dust accumulation or being cleaned on the air duct or the air outlet panel, the air loss of the air conditioner indoor unit 100 changes, and the actual air output of the air conditioner indoor unit 100 fails to reach or exceeds the target air output. At this time, the operation program can also be run. Through the above operation method of the fan assembly, the target rotation speed of the axial flow fan is debugged, so that the actual air output of the air conditioner indoor unit 100 reaches the target air output, the air output is constant, and the air output will change with time accumulation, enhancing the actual use experience of users.

[0129] In one embodiment, as Figure 10 shown, a second embodiment of the operation method of the fan assembly of the present invention is proposed based on the first embodiment.

[0130] In the first embodiment, in step S2, there are various specific ways to obtain the initial air volume. For example, an air volume or air velocity sensor can be set at the actual air outlet end of the air conditioner indoor unit 100. When the first motor drives the cross-flow fan 21 to rotate at the preset speed and the output power of the second motor is zero, the air volume at the actual air outlet end of the air conditioner indoor unit 100 is detected. In the second embodiment, in step S2, the step of obtaining the initial air volume includes:

[0131] Step S21, when the cross-flow fan 21 rotates at the preset speed and the output power of the second motor is zero, obtain the electrical induction signal generated in the second motor when the axial-flow fan 22 rotates passively under the action of the wind field of the cross-flow fan 21.

[0132] In this embodiment, the cross-flow fan 21 rotates at the preset speed to generate a wind field. Under the action of this wind field, if the axial-flow fan 22 is not provided with an anti-rotation structure, it will rotate passively under the action of the wind field of the cross-flow fan 21. At this time, the output power of the second motor is zero. Since the second motor is drivingly connected to the axial-flow fan 22, the rotation action of the axial-flow fan 22 will be transmitted to the motor shaft of the second motor, causing a magnetic field cutting phenomenon to occur inside the second motor of the axial-flow fan 22, thereby generating an induced electrical signal. The induced electrical signal is specifically an induced current or an induced voltage.

[0133] In this embodiment, the specific value of the induced electrical signal can reflect the rotation speed at which the axial-flow fan 22 rotates passively at this time, that is, it can reflect the air volume of the axial-flow fan 22 at this time. The air volume of the axial-flow fan 22 at this time is affected by the external static pressure at the air outlet 12 of the air conditioner indoor unit 100. It can be understood that there is a certain corresponding relationship between the actual air volume at the air outlet end of the air conditioner indoor unit 100, that is, the initial air volume, and the air volume at the axial-flow fan 22. That is to say, when the cross-flow fan 21 rotates actively at the preset speed, the output power of the second motor is zero, and the axial-flow fan 22 rotates passively under the action of the wind field of the cross-flow fan 21, there is a specific mapping relationship between the induced electrical signal and the initial air volume.

[0134] Step S22, determine the initial air volume according to the electrical induction signal and the preset mapping relationship between the electrical induction signal and the initial air volume.

[0135] It should be noted that in this step, the mapping relationship between the induced electrical signal and the initial air volume can specifically be a mapping relationship table between the induced electrical signal and the initial air volume preset by the manufacturer of the air conditioner indoor unit 100 before leaving the factory, or a curve equation of the mapping relationship between the induced electrical signal and the initial air volume.

[0136] Specifically, the mapping relationship between the induced electric signal and the initial air volume can be pre-stored in the data packet of the memory. When the specific value of the induced electric signal is determined, the initial air volume corresponding to the numerical range of the induced electric signal can be found in the data packet according to the mapping relationship table between the induced electric signal and the initial air volume. Or calculate the more accurate initial air volume according to the curve equation of the mapping relationship between the induced electric signal and the initial air volume pre-stored in the data packet.

[0137] In specific implementation, the mapping relationship between the induced electric signal and the initial air volume can be determined through experiments.

[0138] In this embodiment, through the induced electric signal at the axial flow impeller 22, the initial air volume corresponding to the end of the air conditioner indoor unit 100 can be obtained. Thus, the compensation air volume that the axial flow impeller 22 needs to provide can be determined according to the difference between the target air volume and the initial air volume. Then, when the air conditioner indoor unit 100 operates normally, the target rotational speed that the axial flow impeller 22 needs to reach can be determined according to the compensation air volume. The fan assembly is controlled according to this target rotational speed, so that when the first motor drives the cross-flow impeller 21 to rotate at the preset rotational speed during the actual operation of the air conditioner indoor unit 100, the axial flow impeller 22 rotates at the target rotational speed, and the actual air volume of the air conditioner indoor unit 100 reaches the target air volume, and the air output is constant, meeting the use requirements. And in this embodiment, there is no need to set a sensor at the actual air output end of the air conditioner indoor unit 100. The initial air volume can be determined according to the induced electric signal in the second motor, and the result of the initial air volume is accurate and reliable. The structure of the air conditioner indoor unit 100 is simple and the cost is reduced.

[0139] In one embodiment, as Figure 11 shown, a third embodiment of the operation method of the fan assembly of the present invention is proposed based on the first or second embodiment.

[0140] In the third embodiment, the step S4 includes:

[0141] Step S41, determine the target rotational speed of the axial flow impeller 21 according to the compensation air volume and the preset mapping relationship between the rotational speed of the axial flow impeller and the compensation air volume.

[0142] In this step, the mapping relationship between the axial flow fan speed and the compensated air volume can be determined through experiments. For example, in the experiment, a plurality of air ducts with static pressures in the range of 0 to 13 Mpa are successively externally connected to the air conditioner indoor unit 100, and when the first motor drives the cross-flow fan 21 to rotate at the preset speed and the second motor drives the axial flow fan 22 to rotate actively, the corresponding relationship between the rotation speed of the axial flow fan 22 and the actual air volume increment at the end of the fan is detected. It should be noted that when there are multiple axial flow fans 22, the rotation speed of the axial flow fans 22 is the average rotation speed of the multiple axial flow fans 22. Through multiple groups of experiments, multiple groups of the mapping relationship between the axial flow fan speed and the compensated air volume can be finally obtained. It can be understood that the mapping relationship between the axial flow fan speed and the compensated air volume is related to the static pressure conditions of the air outlet components such as the air ducts externally connected to the air outlet 12 of the air conditioner indoor unit 100. Therefore, after determining the initial air volume, it is possible to determine the actual static pressure conditions of the air conditioner indoor unit 100 in the actual installation environment, and thus determine the mapping relationship between the axial flow fan speed and the compensated air volume corresponding to this static pressure condition.

[0143] It should be noted that the mapping relationship between the axial flow fan speed and the compensated air volume can specifically be a mapping relationship table of the axial flow fan speed and the compensated air volume preset by the manufacturer of the air conditioner indoor unit 100 before leaving the factory, or a curve equation of the mapping relationship between the axial flow fan speed and the compensated air volume.

[0144] Specifically, the mapping relationship between the axial flow fan speed and the compensated air volume can be pre-stored in the data packet of the memory. When determining the specific value of the induced electric signal, the rotation speed of the axial flow fan corresponding to this compensated air volume range can be found in the data packet according to the mapping relationship table of the axial flow fan speed and the compensated air volume, and this rotation speed of the axial flow fan is the target rotation speed to be determined. Or calculate the more accurate rotation speed of the axial flow fan 22 according to the curve equation of the mapping relationship between the axial flow fan speed and the compensated air volume pre-stored in the data packet, and this rotation speed of the axial flow fan 22 is the target rotation speed to be determined.

[0145] In this embodiment, the compensated air volume that the axial flow fan 22 needs to provide is determined by the difference between the target air volume and the initial air volume. Then, according to the compensated air volume and the preset mapping relationship between the axial flow fan speed and the compensated air volume, when the air conditioner indoor unit 100 operates normally, the target rotation speed that the axial flow fan 22 needs to reach is determined. The operation of the fan assembly is controlled according to this target rotation speed, so that when the air conditioner indoor unit 100 actually operates, the first motor drives the cross-flow fan 21 to rotate at the preset speed, the second motor drives the axial flow fan 22 to rotate at the target rotation speed, and the actual air volume of the air conditioner indoor unit 100 reaches the target air volume, thereby ensuring that under different installation conditions, the air volume of the air conditioner indoor unit 100 is basically constant in the same gear and meets the use requirements.

[0146] In one embodiment, as Figure 12 shown, a fourth embodiment of the operation method of the fan assembly of the present invention is proposed based on the first embodiment.

[0147] In the fourth embodiment, after the step S4 and before the step S5, it includes:

[0148] Step S42, storing the target rotational speed.

[0149] In this step, after determining the target rotational speed of the axial flow impeller 22 according to the compensated air volume, the target rotational speed is stored. In a specific implementation, the air outlet gear of the air conditioner indoor unit 100 can be correspondingly stored with the target rotational speed. When the air conditioner indoor unit 100 is operating normally, according to the actual air outlet gear of the air conditioner indoor unit 100, the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset rotational speed corresponding to this gear, and the target rotational speed corresponding to this gear is obtained, and the second motor is controlled to drive the axial flow impeller 22 to rotate at the target rotational speed.

[0150] In this embodiment, after the air conditioner indoor unit 100 is installed, debugging is performed. Specifically, the first motor is turned on and the second motor is turned off, and the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset rotational speed, the initial air volume of the air conditioner indoor unit 100 is obtained, and the corresponding target air volume is determined according to the preset rotational speed, that is, the air volume that the air conditioner indoor unit should achieve when the cross-flow impeller rotates at the preset rotational speed; the compensated air volume that the axial flow impeller 22 needs to provide is determined according to the comparison result between the initial air volume and the target air volume; thus, according to the compensated air volume, the target rotational speed that the axial flow impeller 22 needs to reach when the air conditioner indoor unit 100 is operating normally is determined, and the target rotational speed is stored; when the air conditioner indoor unit 100 is operating normally, according to the actual air outlet gear of the air conditioner indoor unit 100, the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset rotational speed corresponding to this gear, and the second motor is controlled to drive the axial flow impeller 22 to rotate at the target rotational speed corresponding to this gear, so that the actual air volume of the air conditioner indoor unit 100 reaches the target air volume, thereby ensuring that the air volume of the air conditioner indoor unit 100 is basically constant at the same gear under different installation conditions and meeting the use requirements.

[0151] In addition, to achieve the above object, the present invention also proposes a control device. The control device of the fan assembly includes: a memory, a processor, and a running program of the fan assembly stored in the memory and executable by the processor. When the running program of the fan assembly is executed by the processor, the steps of the operation method of the fan assembly as described above are implemented.

[0152] Since the control device adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here.

[0153] In addition, to achieve the above object, the present invention further provides a storage medium, on which a fan assembly operation program is stored, and when the fan assembly operation program is executed by a processor, the steps of the operation method of the fan assembly as described above are implemented.

[0154] Since this storage medium adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here.

[0155] In addition, to achieve the above object, the present invention further provides an air conditioner indoor unit 100, and the air conditioner indoor unit 100 includes a housing 10, a fan assembly and the control device.

[0156] The air conditioner indoor unit 100 includes a housing 10, a fan assembly and a heat exchange assembly 30. The housing 10 is formed with an air inlet 11, an air outlet 12 and a heat exchange air duct 13 communicating the air inlet 11 and the air outlet 12. The fan assembly includes a cross-flow fan and an axial-flow fan. The cross-flow fan includes a cross-flow impeller 21 disposed in the heat exchange air duct 13 and a first motor drivingly connected to the cross-flow impeller 21. The first motor is used to drive the cross-flow impeller 21 to rotate. The axial-flow fan includes at least one axial-flow impeller 22 disposed in the heat exchange air duct 13 and a second motor drivingly connected to each axial-flow impeller 22. The second motor is used to drive each axial-flow impeller to rotate. Among them, the cross-flow impeller 21 and at least one axial-flow impeller 22 are serially arranged in the air flow direction of the heat exchange air duct 13.

[0157] The control device controls the fan assembly to operate according to the following steps:

[0158] Control the first motor to drive the cross-flow impeller 21 to rotate at a preset speed;

[0159] Obtain an initial air volume, where the initial air volume is the actual air volume of the air conditioner indoor unit 100 when the cross-flow impeller 21 rotates at the preset speed and the output power of the second motor is zero;

[0160] Determine a compensation air volume according to the initial air volume and the target air volume, where the target air volume is the air volume that the air conditioner indoor unit 100 should achieve when the cross-flow impeller 21 rotates at a preset speed;

[0161] Determine the target speed of the axial-flow impeller 22 according to the compensation air volume;

[0162] Control the second motor to drive the axial-flow impeller 22 to rotate at the target speed.

[0163] In this embodiment, according to the operation method of the fan assembly provided by the present invention, after the air conditioner indoor unit 100 is installed, debugging is first performed. Specifically, the first motor is turned on and the second motor is turned off, and the first motor is controlled to drive the cross-flow impeller 21 to rotate at a preset speed, and the initial air volume of the air conditioner indoor unit 100 is obtained, and a preset target air volume is determined (the target air volume is the air volume that the air conditioner indoor unit should achieve when the cross-flow impeller rotates at a preset speed). The compensation air volume that the axial-flow impeller 22 needs to provide is determined according to the initial air volume and the target air volume. Thus, when the air conditioner indoor unit 100 is operating normally and the first motor drives the cross-flow impeller 21 to rotate at the preset speed, the second motor is controlled to drive the axial-flow impeller 22 to rotate at the target speed, so that the actual air volume of the air conditioner indoor unit 100 reaches the target air volume when it is operating normally, thereby ensuring that the air volume of the air conditioner indoor unit 100 is basically constant at the same gear under different installation conditions and meeting the use requirements.

[0164] Based on the previous embodiment, the step of obtaining the initial air volume includes:

[0165] When the cross-flow impeller 21 rotates at the preset speed and the output power of the second motor is zero, obtain the electrical induction signal generated in the second motor when the axial-flow impeller 22 rotates passively under the action of the wind field of the cross-flow impeller 21;

[0166] Determine the initial air volume according to the electrical induction signal and the preset mapping relationship between the electrical induction signal and the initial air volume.

[0167] In this embodiment, through the induced electrical signal at the axial-flow impeller 22, the initial air volume corresponding to the end of the air conditioner indoor unit 100 can be obtained, and thus the compensation air volume that the axial-flow impeller 22 needs to provide is determined according to the difference between the target air volume and the initial air volume. Then, according to the compensation air volume, the target speed that the axial-flow impeller 22 needs to reach when the air conditioner indoor unit 100 is operating normally is determined. The fan assembly is controlled according to this target speed, so that when the air conditioner indoor unit 100 is actually operating and the first motor drives the cross-flow impeller 21 to rotate at the preset speed, the axial-flow impeller 22 rotates at the target speed, and the actual air volume of the air conditioner indoor unit 100 reaches the target air volume, and the air output is constant, meeting the use requirements. And in this embodiment, there is no need to set a sensor at the actual air output end of the air conditioner indoor unit 100, and the initial air volume can be determined according to the induced electrical signal in the second motor, and the result of the initial air volume is accurate and reliable. The structure of the air conditioner indoor unit 100 is simple and the cost is reduced.

[0168] Based on the above two embodiments, the step of determining the target speed according to the compensated air volume includes:

[0169] Determine the target speed of the axial flow impeller 22 according to the compensated air volume and the preset mapping relationship between the axial flow impeller speed and the compensated air volume.

[0170] In this embodiment, the compensated air volume that the axial flow impeller 22 needs to provide is determined by the difference between the target air volume and the initial air volume. Then, according to the compensated air volume and the preset mapping relationship between the axial flow impeller speed and the compensated air volume, when the air conditioner indoor unit 100 operates normally, the target speed that the axial flow impeller 22 needs to reach is determined. According to this target speed, the fan assembly is controlled to operate. When the air conditioner indoor unit 100 actually operates, the first motor drives the cross-flow impeller 21 to rotate at the preset speed, and the second motor drives the axial flow impeller 22 to rotate at the target speed, so that the actual air volume of the air conditioner indoor unit 100 reaches the target air volume, thereby ensuring that under different installation conditions, the air volume of the air conditioner indoor unit 100 is basically constant in the same gear, meeting the usage requirements.

[0171] In one embodiment, after the step of determining the target speed of the axial flow impeller according to the compensated air volume and before the step of controlling the second motor to drive the axial flow impeller to rotate at the target speed, it includes:

[0172] Store the target speed.

[0173] In this embodiment, after the air conditioner indoor unit 100 is installed, debugging is carried out. Specifically, the first motor is turned on and the second motor is turned off, and the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset speed, and the initial air volume of the air conditioner indoor unit 100 is obtained. Then, according to the preset speed, the corresponding target air volume is determined, that is, the air volume that the air conditioner indoor unit should achieve when the cross-flow impeller rotates at the preset speed. According to the comparison result between the initial air volume and the target air volume, the compensated air volume that the axial flow impeller 22 needs to provide is determined. Then, according to the compensated air volume, the target speed that the axial flow impeller 22 needs to reach when the air conditioner indoor unit 100 operates normally is determined, and the target speed is stored. When the air conditioner indoor unit 100 operates normally, according to the actual air outlet gear of the air conditioner indoor unit 100, the first motor is controlled to drive the cross-flow impeller 21 to rotate at the preset speed corresponding to this gear, and the second motor is controlled to drive the axial flow impeller 22 to rotate at the target speed corresponding to this gear, so that the actual air volume of the air conditioner indoor unit 100 reaches the target air volume, thereby ensuring that under different installation conditions, the air volume of the air conditioner indoor unit 100 is basically constant in the same gear, meeting the usage requirements.

[0174] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or system comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or system comprising such element.

[0175] The serial numbers of the above embodiments of the present invention are for description only and do not represent the superiority or inferiority of the embodiments.

[0176] From the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium as described above (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to enable an intelligent terminal (which can be a mobile phone, computer, server, air conditioner indoor unit, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0177] The above are only the preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made by using the description of the present invention and the accompanying drawings, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A method for operating a fan assembly of an air conditioner indoor unit, characterized in that, The blower assembly includes a cross-flow blower and an axial-flow blower. The cross-flow blower includes a cross-flow impeller and a first motor for driving the cross-flow impeller. The axial-flow blower includes at least one axial-flow impeller and a second motor for driving each axial-flow impeller. The cross-flow impeller and at least one of the axial-flow impellers are arranged in series in the air flow direction of the indoor air conditioner. The operation method of the blower assembly includes: Controlling the first motor to drive the cross-flow impeller to rotate at a preset speed; Obtaining an initial air volume, where the initial air volume is the actual air volume of the indoor air conditioner when the cross-flow impeller rotates at the preset speed and the output power of the second motor is zero; Determining a compensation air volume according to the initial air volume and a target air volume, where the target air volume is the air volume that the indoor air conditioner should achieve when the cross-flow impeller rotates at the preset speed; Determining a target speed of the axial-flow impeller according to the compensation air volume; Controlling the second motor to drive the axial-flow impeller to rotate at the target speed; The step of obtaining the initial air volume includes: When the cross-flow impeller rotates at the preset speed and the output power of the second motor is zero, obtaining an electromagnetic induction signal generated in the second motor when the axial-flow impeller rotates passively under the action of the air field of the cross-flow impeller; Determining the initial air volume according to the electromagnetic induction signal and a preset mapping relationship between the electromagnetic induction signal and the initial air volume; 2. The operating method of the blower assembly of the air conditioner indoor unit according to claim 1, characterized in that The step of determining the target speed according to the compensation air volume includes: Determining the target speed of the axial-flow impeller according to the compensation air volume and a preset mapping relationship between the axial-flow impeller speed and the compensation air volume; 3. The operating method of the blower assembly of the air conditioner indoor unit according to claim 1, characterized in that, After the step of determining the target speed of the axial-flow impeller according to the compensation air volume and before the step of controlling the second motor to drive the axial-flow impeller to rotate at the target speed, it includes: Storing the target speed; 4. A control device, characterized in that, It includes a memory, a processor, and a blower assembly operation program stored on the memory and executable by the processor. When the blower assembly operation program is executed by the processor, the steps of the blower assembly operation method according to any one of claims 1 to 3 are implemented.

5. A storage medium, characterized in that, A blower assembly operation program is stored on the storage medium. When the blower assembly operation program is executed by the processor, the steps of the operation method of the blower assembly according to any one of claims 1 to 3 are implemented.

6. An air conditioner indoor unit, characterized in that, It includes: A housing, the housing is formed with an air inlet, an air outlet, and a heat exchange air duct connecting the air inlet and the air outlet; A blower assembly, including a cross-flow blower and an axial-flow blower. The cross-flow blower includes a cross-flow impeller disposed in the heat exchange air duct and a first motor for driving the cross-flow impeller. The axial-flow blower includes at least one axial-flow impeller disposed in the heat exchange air duct and a second motor for driving each axial-flow impeller. The cross-flow impeller and at least one of the axial-flow impellers are arranged in series in the air flow direction of the heat exchange air duct; The indoor air conditioner further includes a control device, and the control device controls the blower assembly to operate according to the following steps: Controlling the first motor to drive the cross-flow impeller to rotate at a preset speed; Acquire an initial air output volume, where the initial air output volume is the actual air output volume of the air conditioner indoor unit when the crossflow fan wheel rotates at the preset speed and the output power of the second motor is zero; Determining a compensation air volume according to the initial air volume and the target air volume, wherein the target air volume is the air volume that the air conditioner indoor unit should achieve when the crossflow impeller rotates at the preset speed; Determining a target rotation speed of the axial flow wind wheel according to the compensated air output; Controlling the second motor to drive the axial flow fan to rotate at the target speed; The step of obtaining the initial air volume comprises: When the crossflow wind wheel rotates at the preset speed and the output power of the second motor is zero, obtaining an electric induction signal generated in the second motor when the axial flow wind wheel passively rotates under the action of the wind field of the crossflow wind wheel; The initial air volume is determined according to the electrical induction signal and a preset mapping relationship between the electrical induction signal and the initial air volume.

7. The air conditioner indoor unit according to claim 6, wherein, The step of determining the target rotation speed according to the compensated air volume comprises: The target rotation speed of the axial flow wind wheel is determined according to the compensation air volume and the preset mapping relationship between the rotation speed of the axial flow wind wheel and the compensation air volume.

8. The air conditioner indoor unit according to claim 6, characterized in that, After the step of determining the target rotation speed of the axial flow wind wheel according to the compensated air volume and before the step of controlling the second motor to drive the axial flow wind wheel to rotate at the target rotation speed, the method includes: The target rotation speed is stored.

9. The air conditioner indoor unit according to claim 6, characterized in that, The air conditioner indoor unit further comprises a heat exchange component arranged in the heat exchange air duct, and the heat exchange component is located at the upstream side of the cross-flow wind wheel and at least one of the axial flow wind wheels in the air flow direction.

10. The indoor air conditioner according to claim 6, characterized in that, The axial flow wind wheels are provided in plurality, and the plurality of axial flow wind wheels are adjacent to each other in sequence along the axial direction of the cross flow wind wheel.

11. The air conditioner indoor unit according to claim 6, characterized in that, The axial flow wind wheels are provided in plurality, and among the plurality of the axial flow wind wheels, in the axial direction of the cross-flow wind wheel, at least two adjacent axial flow wind wheels are spaced apart, and a gap size between each two adjacent and spaced apart axial flow wind wheels is less than or equal to a diameter of any one of the axial flow wind wheels.

12. The air conditioner indoor unit according to claim 6, characterized in that, The air conditioner indoor unit further comprises an air duct, and the air duct is connected to the air outlet side of the air outlet.

13. The air conditioner indoor unit according to any one of claims 6 to 12, characterized in that, The axial flow impeller is located on the downstream side of the cross flow impeller in the air flow direction.

14. The air conditioner indoor unit according to claim 13, characterized in that, The shell includes a top wall and a bottom wall separated in the upper and lower directions, and a side wall extending between the top wall and the bottom wall. The top wall, the bottom wall and the side walls together enclose the heat exchange air duct. The side walls include a front side wall located on the air outlet side of the shell. The air inlet is formed on the bottom wall, and the air outlet is formed on the front side wall.

15. The volute of claim 14, wherein the volute has an air inlet end and an air outlet end, the crossflow wind wheel is arranged at the air inlet end, the air outlet end is connected to the air inlet side of the air outlet, and the axial flow wind wheel is arranged at the air outlet.

16. The air conditioner indoor unit according to claim 15, characterized in that, The air inlet includes a first air inlet and a second air inlet. The cross-flow fan is horizontally located between the first air inlet and the second air inlet. The heat exchange assembly includes a first heat exchanger and a second heat exchanger which are sequentially and separately arranged in the horizontal direction. The first heat exchanger is horizontally located between the first air inlet and the cross-flow fan, and the second heat exchanger is horizontally located between the cross-flow fan and the second air inlet.

17. The indoor air conditioner according to claim 16, wherein, The second heat exchanger includes a first heat exchange unit and a second heat exchange unit which are sequentially arranged in the up-and-down direction. The upper end of the first heat exchange unit is connected to the top wall, and the lower end of the second heat exchange unit is supported by the bottom wall. The first heat exchange unit and the second heat exchange unit form an angle, and the angle faces the cross-flow fan.

18. The air conditioner indoor unit according to any one of claims 6 to 12, characterized in that, The indoor air conditioner is a duct type indoor air conditioner.

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