Air conditioner indoor unit and air conditioner

Abstract

The invention provides an air conditioner indoor unit and an air conditioner, 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 communicating the air inlet with the air outlet is formed in the shell, and the air outlet comprises a first 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, the air supply distance is increased, and the air supply range is expanded; 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 present invention belongs to the technical field of air conditioners, and particularly relates to an indoor air conditioner and an air conditioner. Background Art

[0002] The cross-flow fan has the characteristics of low noise and large flow rate. Currently, the cylindrical cabinet air conditioner generally uses a cross-flow fan, but the air outlets of the cylindrical cabinet air conditioner are all located on the front side of the housing, so cold air is easy to blow on people. To solve this problem, there are various methods in the prior art, but these methods all have some drawbacks and cannot truly solve the problem:

[0003] 1) Using microporous air outlet: It can achieve non-direct blowing on people, but the air volume loss is serious, and the cooling requirement cannot be met at the far end.

[0004] 2) Increasing the air-sweeping angle to avoid the human activity area: Since the air outlet of the cross-flow fan is weak, increasing the air-sweeping angle can only reduce the amount of wind blowing on people to a certain extent, but cannot completely avoid the human activity area.

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

[0006] In addition, the air outlet pressure of the cross-flow fan is low, and the air supply distance is short, making the temperature rise and fall very slowly at the far end. Summary of the Invention

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

[0008] The present invention provides an indoor air conditioner, including:

[0009] A housing, an air inlet is formed on the rear side wall thereof, an air outlet is formed on the front side wall of the housing, and a air duct is formed inside the housing between the air inlet and the air outlet, and the air duct communicates 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 oppositely up and down;

[0010] A fan, which includes an upper fan and a lower fan which are arranged oppositely up and down in the air duct, and the upper fan corresponds to the upper air outlet area, and the lower fan corresponds to the 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 directions of both the cross-flow fan and the centrifugal fan are along the up and down direction.

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

[0014] Further optionally, the upper blower is close to the upper air outlet area, and the lower blower is close to the lower air outlet area; the indoor air conditioner further 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 indoor air conditioner is provided with a normal air supply mode, a cooling air supply mode, and a heating air supply mode. When the indoor air conditioner operates in any one of the normal air supply mode, the cooling air supply mode, and the heating air supply mode, both the upper blower and the lower blower are in an operating state;

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

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

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

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

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

[0021] Wherein, α1 is the minimum upward inclination angle of the air guide plate, 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 indoor air conditioner and the second air outlet is located below the first air outlet;

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

[0024] Further optionally, the centrifugal fan is formed with a blade cavity, and a centrifugal fan air inlet is formed in the axial direction of the blade cavity. The centrifugal fan air inlet is communicated with the air duct.

[0025] The centrifugal fan upper air outlet is formed at the radially upper end of the blade cavity. An upper baffle is movably arranged at the centrifugal fan upper air outlet, and the upper baffle can be controlled to open or close the centrifugal fan upper air outlet; the centrifugal fan lower air outlet is formed at the radially lower end of the blade cavity. A lower baffle is movably arranged at the centrifugal fan lower air outlet, and the lower baffle can be controlled to open or close the centrifugal fan lower air outlet.

[0026] Further optionally, the air conditioner indoor unit is provided with a conventional air supply mode, a refrigeration air supply mode and a heating air supply mode. When the air conditioner indoor unit operates any one of the conventional air supply mode, the refrigeration air supply mode and the heating air supply mode, both the upper blower and the lower blower are in an operating state.

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

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

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

[0030] The present invention also provides an air conditioner, including the air conditioner indoor unit described in any one of the above. The air conditioner indoor unit is a cylindrical cabinet type.

[0031] Compared with the prior art, the beneficial effects of the present invention mainly lie in:

[0032] By combining a cross-flow fan and a centrifugal fan, the advantages of the cross-flow fan and the centrifugal fan are fully exerted. The problem of direct cold air blowing is completely solved. By using the characteristics of high pressure and high wind speed of the centrifugal fan to drive the air flow of the cross-flow fan, the air supply distance is increased and the air supply range is expanded; the cross-flow fan has small air volume loss and low noise, improving the operation effect of the indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained by extending the provided drawings.

[0034] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0035] Figure 1 It is a schematic exploded view of the structure of an embodiment of an indoor unit of an air conditioner provided by the present invention;

[0036] Figure 2 It is a schematic internal structure view of Embodiment 1 of an indoor unit of an air conditioner provided by the present invention;

[0037] Figure 3a It is a schematic air flow path view of Embodiment 1 when the indoor unit of the air conditioner provided by the present invention is in the normal air supply mode;

[0038] Figure 3b It is a schematic air flow path view of Embodiment 1 when the indoor unit of the air conditioner provided by the present invention is in the cooling air supply mode;

[0039] Figure 3c It is a schematic air flow path view of Embodiment 1 when the indoor unit of the air conditioner provided by the present invention is in the heating air supply mode;

[0040] Figure 4 It is a schematic internal structure view of Embodiment 2 of an indoor unit of an air conditioner provided by the present invention;

[0041] Figure 5a It is a schematic air flow path view of Embodiment 2 when the indoor unit of the air conditioner provided by the present invention is in the normal air supply mode;

[0042] Figure 5b It is a schematic air flow path view of Embodiment 2 when the indoor unit of the air conditioner provided by the present invention is in the cooling air supply mode;

[0043] Figure 5c It is a schematic air flow path view of Embodiment 2 when the indoor unit of the air conditioner provided by the present invention is in the heating air supply 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 duct; 224 - lower air duct; 225 - air inlet of centrifugal fan; 31 - indoor heat exchanger; 32 - air deflector. Detailed implementation manners

[0046] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope 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", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0048] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0049] It should also be noted that the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such commodity or system. Without further limitation, the element defined by the statement "comprising one..." does not exclude the existence of another identical element in the commodity or system including the said element.

[0050] In existing cylindrical air conditioners, in order to avoid the problem of direct cold air blowing, various methods have been proposed, but these methods have many problems: 1) Using microporous air outlets: It can achieve non-direct blowing on people, but the air volume loss is serious, and the cooling requirement cannot be met at the far end; 2) Increasing the swing angle to avoid the human activity area: Since the air outlet of the cross-flow fan is weak, increasing the swing angle can only reduce the amount of wind blowing on people to a certain extent, but cannot completely avoid the human activity area; 3) Using segmented air outlets: By closing the lower half of the air outlets, the problem of direct blowing on people in the sitting position can be avoided, but the problem of direct blowing on people in the 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; as a result, the temperature rise and fall at the far end are very slow;

[0051] The present invention creatively provides an air conditioner indoor unit, including a housing and a fan. An air outlet is formed on the front side wall of the housing, and an air inlet is formed on the rear side wall of the housing. An air duct is formed inside the housing, and the air duct communicates 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 that are arranged up and down relatively; the fan includes an upper fan and a lower fan that are arranged up and down relatively, 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 cross-flow fan and a centrifugal fan, and the lower fan is the other of a cross-flow fan and a centrifugal fan;

[0052] Combining the cross-flow fan and the centrifugal fan gives full play to the advantages of the cross-flow fan and the centrifugal fan. The problem of direct cold air blowing is completely solved. By using the characteristics of high pressure and high wind speed of the centrifugal fan to drive the air flow of the cross-flow fan, the air supply distance is increased and the air supply range is expanded; the cross-flow fan has small air volume loss and low noise, improving the operation effect of the indoor unit.

[0053] Embodiment 1

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

[0055] A housing 1, an air inlet 11 is formed on the rear side wall thereof, an air outlet is formed on the front side wall of the housing 1, and an air duct 13 is formed inside the housing 1 between the air inlet 11 and the air outlet. The air duct 13 communicates 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 indoor 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 that are arranged up and down relatively;

[0056] A fan, which includes an upper fan 21 and a lower fan 22 that are arranged up and down relatively in the air duct 13, 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 operates, a part of the air in the air duct 13 is discharged through the upper air outlet area; when the lower fan 22 operates, another part of the air in the air duct 13 is discharged through the lower air outlet area;

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

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

[0059] To address the problem that the first air outlet 12 cannot supply air in different directions, in this embodiment, a plurality of air guide plates 32 are provided in both the upper air outlet area and the lower air outlet area, and the plurality of air guide plates 32 are sequentially arranged at intervals in the height direction of the air conditioner indoor unit; the plurality of air guide plates 32 can be controlled to swing up and down to guide the air outlets in the upper air outlet area and the lower air outlet area; wherein, the height direction of the air conditioner indoor unit is the up-and-down direction.

[0060] Furthermore, the upper blower 21 is close to the upper air outlet area, and the lower blower 22 is close to the lower air outlet area; the air conditioner indoor unit further includes an indoor heat exchanger 31, and the indoor heat exchanger 31 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 at the rear side of the upper blower and the lower blower.

[0061] To address the problem that in existing cylindrical cabinet air conditioners, the air supply mode is single and cannot meet the different needs of users, in this embodiment, the air conditioner indoor unit is provided with a normal air supply mode, a cooling air supply mode, and a heating air supply mode;

[0062] When the air conditioner indoor unit is in the normal air supply mode, the plate surface of the air guide plate 32 is parallel to the horizontal direction, and both the upper blower 21 and the lower blower 22 are in an operating state; the high-speed and high-pressure air flow sent out by the centrifugal blower with high wind speed and high pressure drives the air flow blown out by the cross-flow blower, increasing the air supply distance, and the combination of the two air flows realizes horizontal long-distance air supply;

[0063] When the air conditioner indoor unit is in the cooling air supply mode, the plate surface of the air guide plate 32 is obliquely upward relative to the horizontal direction, and both the upper blower 21 and the lower blower 22 are in an operating state. The air flow sent out by the centrifugal blower has strong ability to overcome resistance. Utilizing the characteristics of high pressure and high wind speed of the centrifugal blower to drive the air flow of the cross-flow blower can significantly increase the air supply distance and height, significantly expand the air supply range, realize obliquely upward air supply, completely avoid the human activity area, and solve the problem of cold air blowing on people on the premise of ensuring small air volume loss and low noise of the cross-flow blower;

[0064] When the air conditioner indoor unit is in the heating and air supply mode, the plate surface of the air deflector 32 is obliquely downward relative to the horizontal direction. The upper blower 21 and the lower blower 22 are both in the operating state, realizing downward air supply close to the ground, meeting the heating demand in the human activity area, improving the energy utilization rate, and reducing power consumption.

[0065] By providing multiple air supply modes in the air conditioner indoor unit, the problems of poor comfort during cooling and heating caused by a single air supply mode, the inability of the air supply to fully act on the human activity area, and high power consumption are solved.

[0066] Furthermore, when the air conditioner indoor unit is in the cooling and air supply mode, the air deflector 32 is in a swingable state and satisfies: 40° ≤ α1 ≤ 50°, 55° ≤ α2 ≤ 65°; preferably, α1 = 45°, α2 = 60°; where α1 is the minimum upward inclination angle of the air deflector 32, and α2 is the maximum upward inclination angle of the air deflector 32; due to the characteristics of high wind speed and high pressure of the centrifugal fan, the air flow sent out by the centrifugal fan has strong resistance overcoming ability, making its air supply height high; disturbing the air flow of the cross-flow fan to make it supply air obliquely upward, increasing its air supply height and upward air supply angle; compared with the existing air outlet mode of cold air blowing directly in a cylindrical cabinet air conditioner, cold air can be delivered from the oblique upper side, avoiding the human activity area, realizing that cold air does not blow on people, and improving the comfort of the air conditioner.

[0067] When the air conditioner indoor unit is in the heating and air supply mode, the air deflector 32 is in a swingable state and satisfies: 15° ≤ β1 ≤ 25°, 40° ≤ β2 ≤ 50°; preferably, β1 = 20°, β2 = 45°; where β1 is the minimum downward inclination angle of the air deflector 32, and β2 is the maximum downward inclination angle of the air deflector 32; among them, hot air can be sent out obliquely downward, using the Coanda effect to realize floor heating type hot air supply close to the ground; using the principle of hot air floating, the output hot air can directly act on the human activity area, realizing 100% utilization of heat, better temperature rise effect, higher comfort, the room temperature can reach the set temperature faster, and the energy consumption is lower.

[0068] This embodiment also provides an air conditioner, including the air conditioner indoor unit described in any one of the above, and the air conditioner indoor unit is a cylindrical cabinet air conditioner.

[0069] In summary, in the present invention, the cross-flow fan is arranged in the air duct and close to the upper air outlet area, and the centrifugal fan is arranged in the air duct and close to the lower air outlet area. Utilizing the characteristics of high pressure and high wind speed of the centrifugal fan, driving the air flow of the cross-flow fan, improving the air supply distance, and expanding the air supply range; solving the problem of serious air volume loss when realizing that cold air does not blow directly on people, and solving the problem of short air supply distance of the cylindrical cabinet air conditioner.

[0070] Embodiment 2

[0071] As Figures 4 to 5cAs shown, different from Embodiment 1, the air outlet further includes a second air outlet 14. The second air outlet 14 and the first air outlet 12 are spaced apart 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 blower 21 is a cross-flow blower, and the axial direction of the cross-flow blower is along the up-and-down direction; the lower blower 22 is a centrifugal blower, and the axial direction of the centrifugal blower is along the front-and-back direction. The centrifugal blower is formed with a centrifugal blower upper air outlet 221 and a centrifugal blower lower air outlet 222 which are arranged oppositely up and down. The centrifugal blower upper air outlet 221 is communicated with the first air outlet 12 through an upper air duct 223, and the centrifugal blower lower air outlet 222 is communicated with the second air outlet 14 through a lower air duct 224.

[0073] Further, the centrifugal blower is formed with a blade cavity. An air inlet of the centrifugal blower 225 is formed in the axial direction of the blade cavity, and the air inlet 225 of the centrifugal blower is communicated with the air duct 13.

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

[0075] Aiming at the problem that in the existing cylindrical cabinet air conditioner, the air supply mode is single and cannot meet the different needs of users, this embodiment proposes that the air conditioner indoor unit is provided with a conventional air supply mode, a cooling air supply mode and a heating air supply mode; by switching the centrifugal blower upper air outlet 221 and the centrifugal blower lower air outlet 222, the air outlet from the centrifugal blower upper air outlet 221, the air outlet from the centrifugal blower lower air outlet 222 and the simultaneous air outlet from the centrifugal blower upper air outlet 221 and the centrifugal blower lower air outlet 222 are realized, so as to realize conventional air supply, upper cooling air supply and lower heating air supply.

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

[0077] When the air conditioner indoor unit is in the cooling and air supply mode, the upper air outlet of the centrifugal fan is in the open state and the lower air outlet of the centrifugal fan is in the closed state, and both the upper fan 21 and the lower fan 22 are in the operating state; the upper fan 21 operates to make a part of the air in the air duct 13 flow through the indoor heat exchanger 31 and the upper fan 21 and be discharged through the upper air outlet area; the lower fan 22 operates to make another part of the air in the air duct 13 flow through the indoor heat exchanger 31, enter the impeller cavity through the air inlet 225 of the centrifugal fan, and the air in the impeller cavity is discharged into the room through the upper air duct 223 and the lower air outlet area.

[0078] When the air conditioner indoor unit is in the heating and air supply mode, the upper air outlet of the centrifugal fan is in the closed state and the lower air outlet of the centrifugal fan is in the open state, and both the upper fan 21 and the lower fan 22 are in the operating state; the upper fan 21 operates to make a part of the air in the air duct 13 flow through the indoor heat exchanger 31 and the upper fan 21 and be discharged through the upper air outlet area; the lower fan 22 operates to make another part of the air in the air duct 13 flow through the indoor heat exchanger 31, enter the impeller cavity through the air inlet 225 of the centrifugal fan, and the air in the impeller cavity is discharged into the room through the lower air duct 224 and the second air outlet 14.

[0079] The exemplary embodiments of the present disclosure have been specifically illustrated and described above. It should be understood that the present disclosure is not limited to the detailed structures, arrangements or implementation methods described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An air conditioner indoor unit, characterized in that, Comprising: A housing, an air inlet is formed on its rear side wall, an air outlet is formed on the front side wall of the housing, a duct is formed inside the housing between the air inlet and the air outlet, and the duct communicates 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 arranged oppositely up and down; A blower, which includes an upper blower and a lower blower arranged oppositely up and down in the duct, and the upper blower corresponds to the upper air outlet area, and the lower blower corresponds to the lower air outlet area; The upper blower is one of a cross-flow blower and a centrifugal blower, and the lower blower is the other of a cross-flow blower and a centrifugal blower.

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

3. The air conditioner indoor unit according to claim 2, characterized in that, A plurality of air guide plates are arranged in both the upper air outlet area and the lower air outlet area, and the plurality of air guide plates are sequentially spaced in the height direction of the indoor air conditioner; the plurality of air guide plates can be controlled to swing up and down to guide the air output from the upper air outlet area and the lower air outlet area.

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

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

6. The air conditioner indoor unit according to claim 5, characterized in that, When the indoor air conditioner is in the cooling air supply mode, the air guide plate is in a swingable state and satisfies: 40° ≤ α1 ≤ 50°, 55° ≤ α2 ≤ 65°; When the indoor air conditioner is in the heating air supply mode, the air guide plate is in a swingable state and satisfies: 15° ≤ β1 ≤ 25°, 40° ≤ β2 ≤ 50°; Wherein, α1 is the minimum upward inclination angle of the air guide plate, 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 indoor air conditioner according to claim 1, characterized in that, The air outlet further includes a second air outlet, the second air outlet is spaced from the first air outlet in the height direction of the indoor air conditioner and the second air outlet is located below the first air outlet; The upper blower is a cross-flow blower, and the axial direction of the cross-flow blower is along the up-and-down direction; the lower blower is a centrifugal blower, and the axial direction of the centrifugal blower is along the front-and-back direction; the centrifugal blower is formed with a centrifugal blower upper air outlet and a centrifugal blower lower air outlet which are arranged oppositely up and down. The centrifugal blower upper air outlet is communicated with the first air outlet through an upper air duct, and the centrifugal blower lower air outlet is communicated with the second air outlet through a lower air duct.

8. The air conditioner indoor unit according to claim 7, wherein, The centrifugal blower is formed with a blade cavity, and a centrifugal blower air inlet is formed in the axial direction of the blade cavity. The centrifugal blower air inlet is communicated with the air duct. The centrifugal blower upper air outlet is formed at the radially upper end of the blade cavity. An upper baffle is movably arranged at the centrifugal blower upper air outlet, and the upper baffle can be controlled to open or close the centrifugal blower upper air outlet; the centrifugal blower lower air outlet is formed at the radially lower end of the blade cavity. A lower baffle is movably arranged at the centrifugal blower lower air outlet, and the lower baffle can be controlled to open or close the centrifugal blower lower air outlet.

9. The air conditioner indoor unit according to claim 8, characterized in that, The air conditioner indoor unit is provided with a conventional air supply mode, a refrigeration air supply mode and a heating air supply mode. When the air conditioner indoor unit operates any one of the conventional air supply mode, the refrigeration air supply mode and the heating air supply mode, both the upper blower and the lower blower are in an operating state. When the air conditioner indoor unit is in the conventional air supply mode, both the centrifugal blower upper air outlet and the centrifugal blower lower air outlet are in an open state. When the air conditioner indoor unit is in the refrigeration air supply mode, the centrifugal blower upper air outlet is in an open state and the centrifugal blower lower air outlet is in a closed state. When the air conditioner indoor unit is in the heating air supply mode, the centrifugal blower upper air outlet is in a closed state and the centrifugal blower lower air outlet is in an open state.

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

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