Air conditioner indoor unit and air conditioner

Abstract

The air conditioner indoor unit comprises a shell and a fan, an air outlet is formed in the front side wall of the shell, an air inlet is formed in the rear side wall of the shell, an air channel communicated with the air inlet and the air outlet is formed in the shell, the air outlet comprises a first air outlet, and the fan comprises a second air outlet. The first air outlet comprises an upper air outlet area and a lower air outlet area which are oppositely arranged up and down; the fan comprises an upper fan and a lower fan which are oppositely arranged up and down, the upper fan corresponds to the upper air outlet area, and the lower fan corresponds to the lower air outlet area; the upper fan is one of a cross-flow fan and a centrifugal fan, and the lower fan is the other one of the cross-flow fan and the centrifugal fan; the cross-flow fan and the centrifugal fan are combined, so that the advantages of the cross-flow fan and the centrifugal fan are fully exerted; the problem that cold air directly blows people is thoroughly solved, the high-pressure and high-air-speed characteristics of the centrifugal fan are utilized, airflow of the cross-flow fan is driven, and the air supply distance is increased; the cross-flow fan is small in air volume loss and low in noise, and the operation effect of the indoor unit is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners, and in particular relates to an air conditioner indoor unit and an air conditioner. Background Art

[0002] Crossflow fans have the characteristics of low noise and large flow. At present, cylindrical cabinets generally use crossflow fans, but the air outlets of cylindrical cabinets are all located on the front of the shell, so the cold air is easy to blow people. To solve this problem, there are many ways in the existing technology, but these ways all have some disadvantages and cannot really solve the problem:

[0003] 1) Use micro-hole air outlet: It can prevent the air from blowing directly on people, but the air volume loss is serious and the cooling requirement cannot be met at the far end.

[0004] 2) Increase the wind sweeping angle to avoid human activity areas: Since the cross-flow fan has weak air output, increasing the wind sweeping angle can only reduce the amount of wind blowing on people, but it cannot completely avoid human activity areas.

[0005] 3) Use segmented air outlet: By closing the lower half of the air outlet, the problem of direct blowing on people when sitting can be avoided, but it cannot solve the problem of direct blowing on people when standing, and there is also the problem of large air volume loss and complex structure.

[0006] In addition, the cross-flow fan has low air outlet pressure and short air supply distance, which makes the temperature rise and fall at the remote end very slow. Summary of the invention

[0007] In view of this, the utility model provides an air-conditioning indoor unit and an air-conditioner to solve the problems of direct cold air blowing, short air supply distance and small air supply range in the prior art.

[0008] The utility model provides an air-conditioning indoor unit, comprising:

[0009] A shell, a rear side wall of which is formed with an air inlet, a front side wall of the shell is formed with an air outlet, an air duct is formed inside the shell between the air inlet and the air outlet, and the air duct connects the air inlet and the air outlet; the air outlet includes a first air outlet, and the first air outlet includes an upper air outlet area and a lower air outlet area which are arranged opposite to each other up and down;

[0010] A fan, comprising an upper fan and a lower fan which are arranged in the air duct in an upper and lower direction, and the upper fan corresponds to an upper air outlet area, and the lower fan corresponds to a lower air outlet area;

[0011] The upper fan is one of a cross-flow fan and a centrifugal fan, and the lower fan is the other of a cross-flow fan and a centrifugal fan.

[0012] Further optionally, the upper fan is a cross-flow fan, the lower fan is a centrifugal fan, and the axial direction of the cross-flow fan and the axial direction of the centrifugal fan are both along the up-down direction.

[0013] Further optionally, the upper air outlet area and the lower air outlet area are both provided with a plurality of air guide plates, and the plurality of air guide plates are arranged in sequence at intervals in the height direction of the air-conditioning indoor unit; the plurality of air guide plates can be controlled to swing up and down, thereby guiding the air outlet of the upper air outlet area and the lower air outlet area.

[0014] Further optionally, the upper fan is close to the upper air outlet area, and the lower fan is close to the lower air outlet area; the air conditioner indoor unit also includes an indoor heat exchanger, and the indoor heat exchanger is arranged in the air duct and close to the air inlet.

[0015] Further optionally, the air-conditioning indoor unit is provided with an air supply mode, a cooling mode and a heating mode, and when the air-conditioning indoor unit operates in any of the air supply mode, the cooling mode and the heating mode, the upper fan and the lower fan are both in operation;

[0016] When the air conditioner indoor unit is in the air supply mode, the plate surface of the air guide plate is parallel to the horizontal direction;

[0017] When the air conditioner indoor unit is in the cooling mode, the plate surface of the air guide plate is inclined upward relative to the horizontal direction;

[0018] When the air conditioner indoor unit is in the heating mode, the plate surface of the air guide plate is inclined downward relative to the horizontal direction.

[0019] Further optionally, when the air conditioner indoor unit is in the cooling mode, the air guide plate is in a swingable state and satisfies: 40°≤α1≤50°, 55°≤α2≤65°;

[0020] When the air conditioner indoor unit is in the heating mode, the air guide plate is in a swingable state and satisfies: 15°≤β1≤25°, 40°≤β2≤50°;

[0021] Among them, α1 is the minimum upward inclination angle of the air guide plate, and α2 is the maximum upward inclination angle of the air guide plate; β1 is the minimum downward inclination angle of the air guide plate, and β2 is the maximum downward inclination angle of the air guide plate.

[0022] Further optionally, the air outlet further includes a second air outlet, the second air outlet is arranged at intervals in the height direction of the air conditioner indoor unit and the second air outlet is located below the first air outlet;

[0023] The upper fan is a cross-flow fan, and the axial direction of the cross-flow fan is along the up-down direction; the lower fan is a centrifugal fan, and the axial direction of the centrifugal fan is along the front-back direction; the centrifugal fan is formed with an upper air outlet of the centrifugal fan and a lower air outlet of the centrifugal fan which are arranged relatively up and down, the upper air outlet of the centrifugal fan is connected to the first air outlet through the upper air outlet duct, and the lower air outlet of the centrifugal fan is connected to the second air outlet through the lower air outlet duct.

[0024] Further optionally, the centrifugal fan is formed with a blade cavity, an air inlet of the centrifugal fan is formed axially of the blade cavity, and the air inlet of the centrifugal fan is communicated with the air duct;

[0025] The upper air outlet of the centrifugal fan is formed at the radial upper end of the fan blade cavity, and an upper baffle is movably provided at the upper air outlet of the centrifugal fan, and the upper baffle can be controlled to open or close the upper air outlet of the centrifugal fan; the lower air outlet of the centrifugal fan is formed at the radial lower end of the fan blade cavity, and a lower baffle is movably provided at the lower air outlet of the centrifugal fan, and the lower baffle can be controlled to open or close the lower air outlet of the centrifugal fan.

[0026] Further optionally, the air-conditioning indoor unit is provided with an air supply mode, a cooling mode and a heating mode, and when the air-conditioning indoor unit operates in any of the air supply mode, the cooling mode and the heating mode, the upper fan and the lower fan are both in operation;

[0027] When the air conditioner indoor unit is in the air supply mode, the upper air outlet of the centrifugal fan and the lower air outlet of the centrifugal fan are both in an open state;

[0028] When the air conditioner indoor unit is in the cooling mode, the upper air outlet of the centrifugal fan is in an open state and the lower air outlet of the centrifugal fan is in a closed state;

[0029] When the air conditioner indoor unit is in the heating mode, the upper air outlet of the centrifugal fan is in a closed state and the lower air outlet of the centrifugal fan is in an open state.

[0030] The utility model also provides an air conditioner, comprising any one of the air conditioner indoor units described above, wherein the air conditioner indoor unit is a cylindrical cabinet unit.

[0031] Compared with the prior art, the beneficial effects of the utility model are mainly:

[0032] Combine the crossflow fan and the centrifugal fan to give full play to their advantages. Completely solve the problem of cold air blowing directly, use the high pressure and high wind speed characteristics of the centrifugal fan to drive the airflow of the crossflow fan, increase the air supply distance, and expand the air supply range; the crossflow fan has small air volume loss and low noise, which improves the operation effect of the indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0034] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0035] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of an air-conditioning indoor unit provided by the utility model;

[0036] Figure 2 A schematic diagram of the internal structure of an air-conditioning indoor unit embodiment 1 provided by the utility model;

[0037] Figure 3a A schematic diagram of the air flow path of Example 1 when the indoor unit of the air conditioner provided by the utility model is in the air supply mode;

[0038] Figure 3b This is a schematic diagram of the air flow path of Example 1 when the indoor unit of the air conditioner provided by the utility model is in cooling mode;

[0039] Figure 3c This is a schematic diagram of the air flow path of Example 1 when the indoor unit of the air conditioner provided by the utility model is in heating mode;

[0040] Figure 4 A schematic diagram of the internal structure of an air-conditioning indoor unit according to a second embodiment of the present invention;

[0041] Figure 5a A schematic diagram of the air flow path of Embodiment 2 when the indoor unit of the air conditioner provided by the utility model is in the air supply mode;

[0042] Figure 5b A schematic diagram of the air flow path of Embodiment 2 when the indoor unit of the air conditioner provided by the utility model is in cooling mode;

[0043] Figure 5c A schematic diagram of the air flow path of Example 2 when the indoor unit of the air conditioner provided by the utility model is in heating mode;

[0044] In the figure:

[0045] 1-housing; 11-air inlet; 12-first air outlet; 13-air duct; 14-second air outlet; 21-upper fan; 22-lower fan; 221-upper air outlet of centrifugal fan; 222-lower air outlet of centrifugal fan; 223-upper air outlet duct; 224-lower air outlet duct; 225-air inlet of centrifugal fan; 31-indoor heat exchanger; 32-air guide plate. DETAILED DESCRIPTION

[0046] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0048] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0049] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0050] In the existing cylindrical cabinets, in order to avoid the problem of cold air blowing directly, a variety of methods have been proposed, but these methods have many problems: 1) Using micro-hole air outlet: It can achieve the goal of not blowing directly on people, but the air volume loss is serious, and the cooling demand cannot be met at the far end; 2) Increasing the wind sweeping angle to avoid the human activity area: Since the wind output of the cross-flow fan is weak, increasing the wind sweeping angle can only reduce more wind blowing on people, but cannot completely avoid the human activity area; 3) Using segmented air outlet: By closing the lower half of the air outlet, the problem of direct blowing on people in a sitting position can be avoided, but the problem of direct blowing on people in a standing position cannot be solved, and there is also a large air volume loss problem, and the structure is complex; in addition, the air outlet pressure of the cross-flow fan is low and the air supply distance is short, which makes the temperature rise and fall at the far end very slow;

[0051] The utility model creatively provides an air-conditioning indoor unit, comprising a shell and a fan, wherein an air outlet is formed on the front side wall of the shell, an air inlet is formed on the rear side wall of the shell, an air duct is formed inside the shell, and the air duct connects the air inlet and the air outlet; the air outlet comprises a first air outlet, and the first air outlet comprises an upper air outlet area and a lower air outlet area which are arranged relatively up and down; the fan comprises an upper fan and a lower fan which are arranged relatively up and down, and the upper fan corresponds to the upper air outlet area, and the lower fan corresponds to the lower air outlet area; the upper fan is one of a crossflow fan and a centrifugal fan, and the lower fan is the other of the crossflow fan and the centrifugal fan;

[0052] Combine the crossflow fan and the centrifugal fan to give full play to their advantages. Completely solve the problem of cold air blowing directly, use the high pressure and high wind speed characteristics of the centrifugal fan to drive the airflow of the crossflow fan, increase the air supply distance, and expand the air supply range; the crossflow fan has small air volume loss and low noise, which improves the operation effect of the indoor unit.

[0053] Example 1

[0054] like Figures 1 to 3c As shown, this embodiment provides an air conditioner indoor unit, including:

[0055] The housing 1 has an air inlet 11 formed on its rear side wall, and an air outlet formed on the front side wall of the housing 1. An air duct 13 is formed inside the housing 1 between the air inlet 11 and the air outlet, and the air duct 13 connects the air inlet 11 and the air outlet; indoor air can enter the air duct 13 through the air inlet 11, and then be discharged to the room through the air outlet; the air outlet includes a first air outlet 12, and the first air outlet 12 includes an upper air outlet area and a lower air outlet area arranged opposite to each other in the upper and lower directions;

[0056] The fan includes an upper fan 21 and a lower fan 22 which are arranged in the air duct 13 in an upper and lower direction, and the upper fan 21 corresponds to the upper air outlet area, and the lower fan 22 corresponds to the lower air outlet area; when the upper fan 21 is running, a part of the air in the air duct 13 is discharged through the upper air outlet area; when the lower fan 22 is running, another part of the air in the air duct 13 is discharged through the lower air outlet area;

[0057] The upper fan 21 is one of a cross-flow fan and a centrifugal fan, and the lower fan 22 is the other of the cross-flow fan and the centrifugal fan.

[0058] Preferably, the upper fan 21 is a cross-flow fan, and the lower fan 22 is a centrifugal fan, and the axial directions of the cross-flow fan and the centrifugal fan are both in the up-and-down direction, and the upper fan 21 and the lower fan 22 are arranged in parallel up and down; the rotation speed of the upper fan 21 and / or the lower fan 22 can be adjusted according to actual needs, so that the air outlet of the upper fan 21 and the air outlet of the lower fan 22 are merged, ensuring that the temperature distribution of the air outlet is uniform and increasing the air supply distance.

[0059] In response to the problem that the first air outlet 12 cannot supply air to different directions, the present embodiment proposes that both the upper air outlet area and the lower air outlet area are provided with a plurality of air guide plates 32, and the plurality of air guide plates 32 are arranged in sequence at intervals in the height direction of the air-conditioning indoor unit; the plurality of air guide plates 32 can be controlled to swing up and down, thereby guiding the air outlet from the upper air outlet area and the lower air outlet area; wherein, the height direction of the air-conditioning indoor unit is the up and down direction.

[0060] Furthermore, the upper fan 21 is close to the upper air outlet area, and the lower fan 22 is close to the lower air outlet area; the air conditioner indoor unit also includes an indoor heat exchanger 31, which is arranged in the air duct 13 and close to the air inlet 11; the air in the air duct 13 exchanges heat with the indoor heat exchanger 31 when flowing through the indoor heat exchanger 31; the indoor heat exchanger 31 is located on the rear side of the upper fan and the lower fan.

[0061] In view of the problem that the existing cylindrical cabinet has a single air supply mode and cannot meet the different needs of users, this embodiment proposes that the air conditioner indoor unit is provided with an air supply mode, a cooling mode and a heating mode;

[0062] When the indoor unit of the air conditioner is in the air supply mode, the plate surface of the air guide plate 32 is parallel to the horizontal direction, and the upper fan 21 and the lower fan 22 are both in operation; the high-speed and high-pressure airflow delivered by the centrifugal fan at high wind speed and high pressure drives the airflow blown by the cross-flow fan to increase its air supply distance, and the two airflows are combined to realize horizontal long-distance air supply;

[0063] When the indoor unit of the air conditioner is in cooling mode, the plate surface of the air guide plate 32 is inclined upward relative to the horizontal direction, and the upper fan 21 and the lower fan 22 are both in operation. The airflow delivered by the centrifugal fan has a strong ability to overcome resistance. The high pressure and high wind speed characteristics of the centrifugal fan are used to drive the airflow of the crossflow fan, which can greatly increase the air supply distance and air supply height, significantly improve the air supply range, realize oblique upward air supply, completely avoid the human activity area, and solve the problem of cold wind blowing on people while ensuring that the air volume loss and low noise of the crossflow fan are small;

[0064] When the indoor unit of the air conditioner is in heating mode, the plate surface of the air guide plate 32 is tilted downward relative to the horizontal direction, and the upper fan 21 and the lower fan 22 are both in operation, so that air is supplied downward to the ground, meeting the heating demand of the human activity area, improving energy utilization, and reducing power consumption;

[0065] By setting multiple air supply modes on the air conditioner indoor unit, the problem of poor comfort during cooling and heating due to a single air supply mode can be solved, and the problem of air supply not being able to fully reach the human activity area and high power consumption can be solved.

[0066] Furthermore, when the indoor unit of the air conditioner is in cooling mode, the air guide plate 32 is in a swingable state and satisfies: 40°≤α1≤50°, 55°≤α2≤65°; preferably, α1=45°, α2=60°; wherein α1 is the minimum upward inclination angle of the air guide plate 32, and α2 is the maximum upward inclination angle of the air guide plate 32; due to the high wind speed and high pressure characteristics of the centrifugal fan, the airflow delivered by the centrifugal fan has a strong ability to overcome resistance, so that its air supply height is high; the airflow of the crossflow fan is disturbed to make it deliver air obliquely upward, thereby increasing its air supply height and upward air supply angle; compared with the existing cylindrical cabinet cold air direct blowing air outlet mode, it can realize the cold air delivery from the oblique upper side, avoiding the human activity area, realizing that the cold air does not blow people, and improving the comfort of the air conditioner;

[0067] When the indoor unit of the air conditioner is in heating mode, the air guide plate 32 is in a swingable state and satisfies: 15°≤β1≤25°, 40°≤β2≤50°; preferably, β1=20°, β2=45°; wherein β1 is the minimum downward inclination angle of the air guide plate 32, and β2 is the maximum downward inclination angle of the air guide plate 32; wherein, the hot air can be sent out obliquely downward, and the Coanda effect is utilized to realize floor heating-style hot air delivery; utilizing the principle of hot air buoyancy, the output hot air can directly act on the human body activity area, realizing 100% heat utilization, better temperature rise effect, higher comfort, the room temperature can reach the set temperature faster, and energy consumption is lower.

[0068] This embodiment further provides an air conditioner, comprising any one of the air conditioner indoor units described above, wherein the air conditioner indoor unit is a cylindrical cabinet.

[0069] To sum up, the utility model arranges the crossflow fan in the air duct and close to the upper air outlet area, and arranges the centrifugal fan in the air duct and close to the lower air outlet area, and utilizes the high pressure and high wind speed characteristics of the centrifugal fan to drive the airflow of the crossflow fan, increase the air supply distance, and expand the air supply range; solves the problem of serious air volume loss when the cold air does not blow directly on people, and solves the problem of short air supply distance of the cylindrical cabinet.

[0070] Example 2

[0071] like Figure 4 to Figure 5cAs shown, different from the embodiment 1, the air outlet further includes a second air outlet 14, the second air outlet 14 and the first air outlet 12 are arranged at intervals in the height direction of the air conditioner indoor unit and the second air outlet 14 is located below the first air outlet 12;

[0072] The upper fan 21 is a cross-flow fan, and the axial direction of the cross-flow fan is along the up-down direction; the lower fan 22 is a centrifugal fan, and the axial direction of the centrifugal fan is along the front-back direction; the centrifugal fan is formed with an upper centrifugal fan outlet 221 and a lower centrifugal fan outlet 222 which are arranged relatively to each other up and down, the upper centrifugal fan outlet 221 is connected to the first air outlet 12 through the upper air outlet duct 223, and the lower centrifugal fan outlet 222 is connected to the second air outlet 14 through the lower air outlet duct 224.

[0073] Furthermore, the centrifugal fan is formed with a blade cavity, and a centrifugal fan air inlet 225 is formed in the axial direction of the blade cavity, and the centrifugal fan air inlet 225 is connected to the air duct 13;

[0074] An upper air outlet 221 of the centrifugal fan is formed at the radial upper end of the fan blade cavity, and an upper baffle is movably provided at the upper air outlet 221 of the centrifugal fan, and the upper baffle can be controlled to open or close the upper air outlet 221 of the centrifugal fan; a lower air outlet 222 of the centrifugal fan is formed at the radial lower end of the fan blade cavity, and a lower baffle is movably provided at the lower air outlet 222 of the centrifugal fan, and the lower baffle can be controlled to open or close the lower air outlet 222 of the centrifugal fan.

[0075] In view of the problem that the existing cylindrical cabinet has a single air supply mode and cannot meet the different needs of users, this embodiment proposes that the air conditioner indoor unit is provided with an air supply mode, a cooling mode and a heating mode; by switching the upper air outlet 221 of the centrifugal fan and the lower air outlet 222 of the centrifugal fan, the upper air outlet 221 of the centrifugal fan, the lower air outlet 222 of the centrifugal fan and the upper air outlet 221 of the centrifugal fan and the lower air outlet 222 of the centrifugal fan can be switched to achieve air discharge from the upper air outlet 221 of the centrifugal fan, air discharge from the lower air outlet 222 of the centrifugal fan and air discharge from the upper air outlet 221 of the centrifugal fan and the lower air outlet 222 of the centrifugal fan at the same time, thereby achieving conventional air supply, upper air supply for cooling and lower air supply for heating;

[0076] When the indoor unit of the air conditioner is in the air supply mode, the upper air outlet 221 of the centrifugal fan and the lower air outlet 222 of the centrifugal fan are both in the open state, and the upper fan 21 and the lower fan 22 are both in the running state; the upper fan 21 is running, so that a part of the air in the air duct 13 flows through the indoor heat exchanger 31 and the upper fan 21, and is discharged through the upper air outlet area; the lower fan 22 is running, so that another part of the air in the air duct 13 flows through the indoor heat exchanger 31, and enters the fan blade cavity through the centrifugal fan air inlet 225; a part of the air in the fan blade cavity is discharged to the room through the upper air outlet 223 and the lower air outlet area, and another part of the air in the fan blade cavity is discharged to the room through the lower air outlet 224 and the second air outlet 14;

[0077] When the indoor unit of the air conditioner is in cooling mode, the upper air outlet of the centrifugal fan is in an open state and the lower air outlet of the centrifugal fan is in a closed state, and the upper fan 21 and the lower fan 22 are both in operation; the upper fan 21 is in operation, so that a part of the air in the air duct 13 flows through the indoor heat exchanger 31 and the upper fan 21, and is discharged through the upper air outlet area; the lower fan 22 is in operation, so that another part of the air in the air duct 13 flows through the indoor heat exchanger 31, and enters the fan blade cavity through the centrifugal fan air inlet 225, and the air in the fan blade cavity is discharged to the room through the upper air outlet duct 223 and the lower air outlet area;

[0078] When the indoor unit of the air conditioner is in heating mode, the upper air outlet of the centrifugal fan is in a closed state and the lower air outlet of the centrifugal fan is in an open state, and the upper fan 21 and the lower fan 22 are both in operation; the upper fan 21 is in operation, so that a part of the air in the air duct 13 flows through the indoor heat exchanger 31 and the upper fan 21, and is discharged through the upper air outlet area; the lower fan 22 is in operation, so that another part of the air in the air duct 13 flows through the indoor heat exchanger 31, and enters the fan blade cavity through the centrifugal fan air inlet 225, and the air in the fan blade cavity is discharged to the room through the lower air outlet 224 and the second air outlet 14.

[0079] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included in the spirit and scope of the appended claims.

Claims

1. An air conditioner indoor unit, It is characterized in that include: A shell, a rear side wall of which is formed with an air inlet, a front side wall of the shell is formed with an air outlet, an air duct is formed inside the shell between the air inlet and the air outlet, and the air duct connects the air inlet and the air outlet; the air outlet includes a first air outlet, and the first air outlet includes an upper air outlet area and a lower air outlet area which are arranged opposite to each other up and down; A fan, comprising an upper fan and a lower fan which are arranged in the air duct in an upper and lower direction, and the upper fan corresponds to an upper air outlet area, and the lower fan corresponds to a lower air outlet area; The upper fan is one of a cross-flow fan and a centrifugal fan, and the lower fan is the other of a cross-flow fan and a centrifugal fan.

2. The air conditioner indoor unit according to claim 1, It is characterized in that The upper fan is a cross-flow fan, and the lower fan is a centrifugal fan, and the axial directions of the cross-flow fan and the centrifugal fan are both in the up-down direction.

3. The air conditioner indoor unit according to claim 2, It is characterized in that The upper air outlet area and the lower air outlet area are both provided with a plurality of air guide plates, which are arranged in sequence at intervals in the height direction of the air conditioner indoor unit; the plurality of air guide plates can be controlled to swing up and down, thereby guiding the air outlet of the upper air outlet area and the lower air outlet area.

4. The air conditioner indoor unit according to claim 3, It is characterized in that The upper fan is close to the upper air outlet area, and the lower fan is close to the lower air outlet area; the air conditioner indoor unit also includes an indoor heat exchanger, and the indoor heat exchanger is arranged in the air duct and close to the air inlet.

5. The air conditioner indoor unit according to claim 4, It is characterized in that The air conditioner indoor unit is provided with an air supply mode, a cooling mode and a heating mode. When the air conditioner indoor unit operates in any of the air supply mode, the cooling mode and the heating mode, the upper fan and the lower fan are both in operation; When the air conditioner indoor unit is in the air supply mode, the plate surface of the air guide plate is parallel to the horizontal direction; When the air conditioner indoor unit is in the cooling mode, the plate surface of the air guide plate is inclined upward relative to the horizontal direction; When the air conditioner indoor unit is in the heating mode, the plate surface of the air guide plate is inclined downward relative to the horizontal direction.

6. The air conditioner indoor unit according to claim 5, It is characterized in that When the air conditioner indoor unit is in the cooling mode, the air guide plate is in a swingable state and satisfies: 40°≤α1≤50°, 55°≤α2≤65°; When the air conditioner indoor unit is in the heating mode, the air guide plate is in a swingable state and satisfies: 15°≤β1≤25°, 40°≤β2≤50°; Among them, α1 is the minimum upward inclination angle of the air guide plate, and α2 is the maximum upward inclination angle of the air guide plate; β1 is the minimum downward inclination angle of the air guide plate, and β2 is the maximum downward inclination angle of the air guide plate.

7. The air conditioner indoor unit according to claim 1, It is characterized in that The air outlet further includes a second air outlet, the second air outlet is spaced apart from the first air outlet in the height direction of the air conditioner indoor unit and the second air outlet is located below the first air outlet; The upper fan is a cross-flow fan, and the axial direction of the cross-flow fan is along the up-down direction; the lower fan is a centrifugal fan, and the axial direction of the centrifugal fan is along the front-back direction; the centrifugal fan is formed with an upper air outlet of the centrifugal fan and a lower air outlet of the centrifugal fan which are arranged relatively up and down, the upper air outlet of the centrifugal fan is connected to the first air outlet through the upper air outlet duct, and the lower air outlet of the centrifugal fan is connected to the second air outlet through the lower air outlet duct.

8. The air conditioner indoor unit according to claim 7, It is characterized in that The centrifugal fan is formed with a blade cavity, an air inlet of the centrifugal fan is formed in the axial direction of the blade cavity, and the air inlet of the centrifugal fan is communicated with the air duct; The upper air outlet of the centrifugal fan is formed at the radial upper end of the fan blade cavity, and an upper baffle is movably provided at the upper air outlet of the centrifugal fan, and the upper baffle can be controlled to open or close the upper air outlet of the centrifugal fan; the lower air outlet of the centrifugal fan is formed at the radial lower end of the fan blade cavity, and a lower baffle is movably provided at the lower air outlet of the centrifugal fan, and the lower baffle can be controlled to open or close the lower air outlet of the centrifugal fan.

9. The air conditioner indoor unit according to claim 8, It is characterized in that The air conditioner indoor unit is provided with an air supply mode, a cooling mode and a heating mode. When the air conditioner indoor unit operates in any of the air supply mode, the cooling mode and the heating mode, the upper fan and the lower fan are both in operation; When the air conditioner indoor unit is in the air supply mode, the upper air outlet of the centrifugal fan and the lower air outlet of the centrifugal fan are both in an open state; When the air conditioner indoor unit is in the cooling mode, the upper air outlet of the centrifugal fan is in an open state and the lower air outlet of the centrifugal fan is in a closed state; When the air conditioner indoor unit is in the heating mode, the upper air outlet of the centrifugal fan is in a closed state and the lower air outlet of the centrifugal fan is in an open state.

10. An air conditioner, It is characterized in that It comprises the air-conditioning indoor unit according to any one of claims 1 to 9, wherein the air-conditioning indoor unit is a cylindrical cabinet.

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