Air duct structure and air conditioner with same

Abstract

The application provides a wind channel structure and an air conditioner with the same. The wind channel structure comprises a first wind channel part and a second wind channel part. The first wind channel part has a first fan mounting cavity. The second wind channel part has a second fan mounting cavity. The distance between a first plane where the center line of the first fan mounting cavity is located and a second plane where the center line of the second fan mounting cavity is located is H. The value range of H is 630mm>=H>=570mm. The first wind channel part comprises a first upper wind channel section, a first transition section and a first lower wind channel section. The value range of the bending angle a between the first transition section and the first upper wind channel section is 40>=a>=25. The wind channel structure solves the problem of high flow passage resistance of the wind channel structure in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioners, in particular to an air duct structure and an air conditioner having the same. BACKGROUND

[0002] At present, in the design of the fan air duct of an air conditioner, the air outlet power source is mostly a centrifugal fan, an axial flow fan or a cross flow fan.

[0003] For an air conditioner capable of realizing distributed air supply, a centrifugal fan is generally used as the power output, and the number of arrangements is generally 2 or more. In the design of the air duct, the following problems are prone to occur: the flow channel is greatly bent and twisted, the flow channel resistance is high, the airflow impacts the flow channel wall, and the sound quality of the noise is poor. SUMMARY

[0004] The main purpose of the present application is to provide an air duct structure and an air conditioner having the same, so as to solve the problem of high flow channel resistance of the air duct structure in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an air duct structure is provided, comprising a first air duct part and a second air duct part, the first air duct part has a first air duct, the first air duct has a first fan mounting cavity for mounting a first fan, the second air duct part has a second air duct, the second air duct has a second fan mounting cavity for mounting a second fan, a first plane in which a center line of the first fan mounting cavity is arranged in parallel with a second plane in which a center line of the second fan mounting cavity is arranged, the distance between the first plane and the second plane is H, wherein the value range of H is: 630mm≥H≥570mm; wherein the center line of the first fan mounting cavity coincides with the rotation axis of the impeller part of the first fan, and the center line of the second fan mounting cavity coincides with the rotation axis of the impeller part of the second fan.

[0006] Further, the first air duct part comprises a first upper air duct section, a first transition section and a first lower air duct section connected in sequence, the first upper air duct section and the first lower air duct section are arranged along the horizontal direction, the bending angle between the first transition section and the first upper air duct section and / or the bending angle between the first transition section and the first lower air duct section is α; wherein the value range of α is: 40°≥α≥25°.

[0007] Further, the second air duct part comprises a second upper air duct section, a second transition section and a second lower air duct section connected in sequence, the second upper air duct section and the second lower air duct section are arranged along the horizontal direction, the bending angle between the second transition section and the second upper air duct section and / or the bending angle between the second transition section and the second lower air duct section is β; wherein the value range of β is: 16°≥β≥0°.

[0008] Further, projections of at least part of the first air duct part and at least part of the second air duct part in a predetermined vertical plane overlap, and a minimum width A of the air duct cavity of the first air duct part in a predetermined direction is greater than or equal to a minimum width B of the air duct cavity of the second air duct part in the predetermined direction.

[0009] Further, in the predetermined direction, a minimum width C of the overlap of the first air duct part and the second air duct part is in a range of 0.9 (A+B)≥C≥0.8 (A+B).

[0010] Further, the first air duct part has a first lower air duct section, and the second air duct part has a second lower air duct section, and part of the first lower air duct section and part of the second lower air duct section are separated by a shared partition plate body; wherein a length of the partition plate body in the vertical direction is L1; wherein L1 is in a range of 460mm≥L1≥380mm.

[0011] Further, the partition plate body is provided with a communication opening for communicating the first air duct part and the second air duct part.

[0012] Further, a length of the communication opening in the vertical direction is L2, and L2 is in a range of 0.8 L1≥L2≥0.7 L1.

[0013] Further, a stop plate is arranged in the communication opening, and the stop plate is arranged spaced apart from the top end and the bottom end of the communication opening.

[0014] Further, a length of the stop plate in the vertical direction is p; wherein 120mm≥p≥100mm; and / or a vertical distance between the bottom end of the stop plate and the bottom end of the communication opening is q; wherein 80mm≥q≥40mm.

[0015] Further, an airflow flow cross section of the first lower air duct section at the partition plate body is S1, and an airflow flow cross section of the second lower air duct section at the partition plate body is S2; wherein S1:S2=3:4.

[0016] Further, the first fan mounting cavity and the second fan mounting cavity each have an air outlet, and a width of the air outlet of the first fan mounting cavity is equal to a width of the air outlet of the second fan mounting cavity; wherein a width direction of the air outlet of the first fan mounting cavity and a width direction of the air outlet of the second fan mounting cavity are the distribution directions of the first air duct part and the second air duct part.

[0017] Further, the value of H is 600 mm; and / or the first air duct part comprises a first upper air duct section, a first transition section and a first lower air duct section connected in sequence, the first upper air duct section and the first lower air duct section are arranged along the horizontal direction, the bending angle between the first transition section and the first upper air duct section and / or the bending angle between the first transition section and the first lower air duct section is α; wherein α = 30°; and / or the second air duct part comprises a second upper air duct section, a second transition section and a second lower air duct section connected in sequence, the second upper air duct section and the second lower air duct section are arranged along the horizontal direction, the bending angle between the second transition section and the second upper air duct section and / or the bending angle between the second transition section and the second lower air duct section is β; wherein β = 14°.

[0018] Further, at least part of the first air duct part and at least part of the second air duct part are distributed in overlap along the preset direction, the minimum width A of the air duct cavity of the first air duct part along the preset direction is 100 mm; and / or the minimum width B of the air duct cavity of the second air duct part along the preset direction is 74 mm; and / or the minimum width C of the overlap of the first air duct part and the second air duct part is 175 mm.

[0019] Further, the overlap of the first air duct part and the second air duct part is provided with a shared partition plate body part, the length L1 of the partition plate body part along the vertical direction is 440 mm; and / or the partition plate body part is provided with a communication opening for communicating the first air duct part and the second air duct part, the length L2 of the communication opening along the vertical direction is 330 mm.

[0020] According to another aspect of the present application, an air conditioner is provided, comprising a shell and an air duct structure arranged in the shell, the air duct structure being the above-mentioned air duct structure.

[0021] By applying the technical solution of the present application, the air duct structure of the present application comprises a first air duct part and a second air duct part, the first air duct part has a first air duct, the first air duct has a first fan mounting cavity for mounting a first fan, the second air duct part has a second air duct, the second air duct has a second fan mounting cavity for mounting a second fan, the center line of the first fan mounting cavity is arranged in a first plane parallel to the center line of the second fan mounting cavity, the distance between the first plane and the second plane is H, wherein the value of H is in the range of 630 mm ≥ H ≥ 570 mm; wherein the center line of the first fan mounting cavity coincides with the rotation axis of the impeller part of the first fan, and the center line of the second fan mounting cavity coincides with the rotation axis of the impeller part of the second fan. In this way, the fan air duct layout is compact, the flow resistance of the first air duct and the second air duct is reduced, and the air volume is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification. The embodiments of the application, together with its

[0023] Figure 1 FIG. 1 shows a schematic view of the internal structure of an air conditioner according to an embodiment of the present application when the first and second air ducts are not connected;

[0024] Figure 2 FIG. 2 shows a schematic view of the structure of an air duct structure according to an embodiment of the present application when the first and second air ducts are not connected;

[0025] Figure 3 FIG. 3 shows a schematic view of the structure of an air duct structure according to an embodiment of the present application when the first and second air ducts are connected; Figure 2

[0026] Figure 4 FIG. 4 shows a schematic view of the internal structure of an air conditioner according to an embodiment of the present application when the first and second air ducts are connected;

[0027] Figure 5 FIG. 5 shows a schematic view of the structure of a first embodiment of an air duct structure according to the present application when the first and second air ducts are connected;

[0028] Figure 6 FIG. 6 shows a schematic view of the structure of a second embodiment of an air duct structure according to the present application when the first and second air ducts are connected;

[0029] Figure 7 FIG. 7 shows a comparison of velocity simulations before and after the first and second air ducts are connected according to a first embodiment of an air duct structure according to the present application;

[0030] Figure 8 FIG. 8 shows a comparison of air duct pressure simulations before and after the first and second air ducts are connected according to a first embodiment of an air duct structure according to the present application;

[0031] Figure 9 FIG. 9 shows a comparison of air duct pressure simulations before and after the first and second air ducts are connected according to a second embodiment of an air duct structure according to the present application.

[0032] In the above-described drawings, reference numerals include:

[0033] ​10, first air duct part; 100, first air duct; 110, first air fan; 101, first air fan mounting cavity; 11, first upper air duct section; 12, first transition section; 13, first lower air duct section; 130, first outlet; 20, second air duct part; 200, second air duct; 210, second air fan; 201, second air fan mounting cavity; 21, second upper air duct section; 22, second transition section; 23, second lower air duct section; 230, second outlet; 30, partition plate body part; 300, communication opening; 301, stop plate; 40, air inlet. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Since cabinet air conditioners are limited by their shapes, the flow channel design mostly adopts parallel air outlet flow channels, and the air fans are arranged in an up-down distribution. Due to the different lengths of the respective air outlet flow channels and the different air outlet areas, the flow rates of the air outlet flow channels are different, which causes different pressure differences on the two sides of the flow channel wall shared by the flow channels, and the instability of the airflow causes the wall to vibrate, thus causing the aerodynamic noise abnormality similar to "drum sound".

[0036] Please refer to Figures 1 to 6 The present application provides an air duct structure, which comprises a first air duct part 10 and a second air duct part 20, the first air duct part 10 has a first air duct 100, the first air duct 100 has a first air fan mounting cavity 101 for mounting a first air fan 110, the second air duct part 20 has a second air duct 200, the second air duct 200 has a second air fan mounting cavity 201 for mounting a second air fan 210, a first plane in which a center line of the first air fan mounting cavity 101 is arranged in parallel with a second plane in which a center line of the second air fan mounting cavity 201 is arranged, the distance between the first plane and the second plane is H, wherein the value range of H is 630mm≥H≥570mm; wherein the center line of the first air fan mounting cavity 101 coincides with the rotation axis of the impeller part of the first air fan 110, and the center line of the second air fan mounting cavity 201 coincides with the rotation axis of the impeller part of the second air fan 210.

[0037] The air duct structure of the application comprises a first air duct part 10 and a second air duct part 20, the first air duct part 10 has a first air duct 100, the first air duct 100 has a first fan mounting cavity 101 for mounting a first fan 110, the second air duct part 20 has a second air duct 200, the second air duct 200 has a second fan mounting cavity 201 for mounting a second fan 210, a first plane where the center line of the first fan mounting cavity 101 is located is arranged in parallel with a second plane where the center line of the second fan mounting cavity 201 is located, the distance between the first plane and the second plane is H, wherein the value range of H is: 630mm≥H≥570mm; wherein the center line of the first fan mounting cavity 101 coincides with the rotation axis of the impeller part of the first fan 110, and the center line of the second fan mounting cavity 201 coincides with the rotation axis of the impeller part of the second fan 210.

[0038] The air duct structure of the application comprises a first air duct part 10 and a second air duct part 20, the first air duct part 10 has a first air duct 100, the first air duct 100 has a first fan mounting cavity 101 for mounting a first fan 110, the second air duct part 20 has a second air duct 200, the second air duct 200 has a second fan mounting cavity 201 for mounting a second fan 210, a first plane where the center line of the first fan mounting cavity 101 is located is arranged in parallel with a second plane where the center line of the second fan mounting cavity 201 is located, the distance between the first plane and the second plane is H, wherein the value range of H is: 630mm≥H≥570mm; wherein the center line of the first fan mounting cavity 101 coincides with the rotation axis of the impeller part of the first fan 110, and the center line of the second fan mounting cavity 201 coincides with the rotation axis of the impeller part of the second fan 210. In this way, the fan air duct layout is compact, the flow resistance of the first air duct 100 and the second air duct 200 is reduced, and the air volume of the outflow is improved.

[0039] In the embodiment of the application, the air duct structure is applied to the air duct design of a distributed air supply cabinet type air conditioner with double centrifugal fans.

[0040] As shown in Figure 2 and Figure 5 , the first air duct part 10 comprises a first upper air duct section 11, a first transition section 12 and a first lower air duct section 13 connected in sequence, the first upper air duct section 11 and the first lower air duct section 13 are arranged along the horizontal direction, the bending angle between the first transition section 12 and the first upper air duct section 11 and / or the bending angle between the first transition section 12 and the first lower air duct section 13 is α; wherein the value range of α is: 40°≥α≥25°.

[0041] Specifically, the second air duct part 20 comprises a second upper air duct section 21, a second transition section 22 and a second lower air duct section 23 connected in sequence, the second upper air duct section 21 and the second lower air duct section 23 are arranged along the horizontal direction, and the bending angle between the second transition section 22 and the second upper air duct section 21 and / or the bending angle between the second transition section 22 and the second lower air duct section 23 is β; wherein the value range of β is: 16°≥β≥0°.

[0042] Specifically, at least part of the first air duct part 10 and at least part of the second air duct part 20 are arranged in overlapping projection in a predetermined vertical plane, and the width A of the air duct cavity of the first air duct part 10 along the preset direction is greater than or equal to the width B of the air duct cavity of the second air duct part 20 along the preset direction.

[0043] Optionally, the value range of the width A is 120mm≥β≥80mm.

[0044] In the embodiment of the present application, along the preset direction, the minimum width C of the overlapping part of the first air duct part 10 and the second air duct part 20 is in the range of: 0.9 (A+B)≥C≥0.8 (A+B).

[0045] As shown in Figure 2 and Figure 5 , the air duct structure has an air inlet 40, and along the air inlet direction of the air inlet 40, at least part of the first upper air duct section 11 is located on one side of the first lower air duct section 13.

[0046] Specifically, the first air duct part 10 has a first lower air duct section 13, the second air duct part 20 has a second lower air duct section 23, and part of the first lower air duct section 13 and part of the second lower air duct section 23 are separated by a shared partition plate body part 30; wherein the length of the partition plate body part 30 along the vertical direction is L1; wherein the value range of L1 is: 460mm≥L1≥380mm.

[0047] In the embodiment of the present application, the partition plate body part 30 is provided with a communication opening 300 for communicating the first air duct part 10 and the second air duct part 20.

[0048] Specifically, the length of the communication opening 300 along the vertical direction is L2, and the value range of L2 is: 0.8 L1≥L2≥0.7 L1.

[0049] Optionally, a stop plate 301 is arranged in the communication opening 300, and the stop plate 301 is arranged in interval with the top end and the bottom end of the communication opening 300.

[0050] In the embodiment of the present application, the length of the stop plate 301 in the vertical direction is p; wherein 120mm≥p≥100mm; and / or the vertical distance between the bottom end of the stop plate 301 and the bottom end of the communication opening 300 is q; wherein 80mm≥q≥40mm.

[0051] As shown in Figure 3 The air flow passage section of the first lower air duct section 13 at the partition plate body 30 is S1, and the air flow passage section of the second lower air duct section 23 at the partition plate body 30 is S2; wherein S1:S2=3:4.

[0052] Specifically, the first fan mounting cavity 101 and the second fan mounting cavity 201 each have an air outlet, and the width of the air outlet of the first fan mounting cavity 101 is equal to the width of the air outlet of the second fan mounting cavity 201; wherein the width direction of the air outlet of the first fan mounting cavity 101 and the width direction of the air outlet of the second fan mounting cavity 201 are the distribution directions of the first air duct part 10 and the second air duct part 20.

[0053] Optionally, the width of the air outlet of the first fan mounting cavity 101 and the width of the air outlet of the second fan mounting cavity 201 have a slight difference.

[0054] Specifically, the air duct structure further comprises a first outlet 130 and a second outlet 230, the first outlet 130 is in communication with the first air duct 100, and the first outlet 130 is arranged at the end of the first lower air duct section 13; the second outlet 230 is in communication with the second air duct 200, and the second outlet 230 is arranged at the end of the second lower air duct section 23; wherein the width of the first outlet 130 is equal to the width of the second outlet 230, and the width direction of the first outlet 130 and the second outlet 230 is the extension direction of the air duct structure.

[0055] In the first embodiment of the present application, the value of H is 600mm; and / or the first air duct part 10 comprises a first upper air duct section 11, a first transition section 12 and a first lower air duct section 13 connected in sequence, the first upper air duct section 11 and the first lower air duct section 13 are arranged along the horizontal direction, and the bending angle between the first transition section 12 and the first upper air duct section 11 and / or the bending angle between the first transition section 12 and the first lower air duct section 13 is α; wherein α=30°; and / or the second air duct part 20 comprises a second upper air duct section 21, a second transition section 22 and a second lower air duct section 23 connected in sequence, the second upper air duct section 21 and the second lower air duct section 23 are arranged along the horizontal direction, and the bending angle between the second transition section 22 and the second upper air duct section 21 and / or the bending angle between the second transition section 22 and the second lower air duct section 23 is β; wherein β=14°.

[0056] Specifically, at least part of the first air duct part 10 and at least part of the second air duct part 20 are distributed in overlap along the preset direction, the width A of the air duct cavity of the first air duct part 10 along the preset direction is 100 mm; and / or the width B of the air duct cavity of the second air duct part 20 along the preset direction is 74 mm; and / or the minimum width C of the overlap of the first air duct part 10 and the second air duct part 20 is 175 mm.

[0057] Specifically, the overlap of the first air duct part 10 and the second air duct part 20 is provided with a shared partition plate body part 30, the length L1 of the partition plate body part 30 along the vertical direction is 440 mm; and / or the shared partition plate body part 30 is provided with a communication opening 300 for communicating the first air duct part 10 and the second air duct part 20, the length L2 of the communication opening 300 along the vertical direction is 330 mm.

[0058] In the specific implementation process of the first embodiment of the present application, as shown in Figure 5 、 Figure 7 and Figure 8 , when designed with this design parameter, the fan air duct layout is compact, the air duct volume occupies the whole machine space in the best state, the flow resistance is small, and the pressure self-balancing between different air ducts is better. Because the first air duct 100 where the first fan 110 is located is relatively long, and the airflow converges, the cross-sectional ratio of the first air duct 100 and the second air duct 200 is S1:S2=3:4, and the first transition section 12 of the first air duct 100 is bent, so the flow resistance of the first air duct is larger, the static pressure of the first fan 110 changes more from the dynamic pressure of the outlet, the wind speed loss is larger, the static pressure is higher, and the dynamic pressure is smaller. The second fan 210 has no large resistance to the outlet, so the wind speed is higher, the airflow dynamic pressure is larger, and the static pressure is smaller. After the first air duct 100 and the second air duct 200 are communicated.

[0059] Although the airflow in the first air duct 100 and the second air duct 200 is parallel before converging, the side with high static pressure pushes the outlet air to the side with low static pressure, the airflow direction changes, the pressure on both sides is balanced, the vortex is reduced, the flow resistance is reduced, the air volume is increased, and the outlet air volume of the first outlet 130 and the second outlet 230 is nearly consistent. At the same time, the dynamic pressure and the static pressure in the first air duct 100 and the second air duct 200 become stable, the overall aerodynamic noise is obviously improved.

[0060] In the second embodiment of the present application, as shown in Figure 6 and Figure 9As shown, the distance H between the first fan 110 and the second fan 210 is 600 mm, the cross section ratio of the first air duct 100 and the second air duct 200 is S1:S2=3:4, the bending angle of the first transition section 12 is α=30°, the bending angle of the second transition section 22 is β=14°, the width of the first air duct 100 is A=100 mm, the width of the second air duct 200 is B=74 mm, the minimum width of the air outlet duct is C=175 mm, the wall length shared by the first air duct and the second air duct is L1=440 mm, and the length of the air duct communication opening is L2=330 mm. The L2 section can be divided into two communication sections, wherein the distance from the bottom partition position q is 80 mm≥q≥40 mm, a partition plate with a length of p is arranged, 120 mm≥p≥100 mm, so as to balance the pressure on both sides, reduce the vortex, reduce the flow resistance, increase the air volume, make the pressure in the air duct self-balanced, and thus reduce the aerodynamic noise.

[0061] The application further provides an air conditioner, which comprises a shell and an air duct structure arranged in the shell, and the air duct structure is the air duct structure described above.

[0062] In summary, the parameter design of the air duct structure of the application can reduce the flow resistance, increase the air volume, make the pressure in the air duct self-balanced, make the air flow pressure and static pressure between different flow channels change more smoothly, balance the air pressure difference of each flow channel, reduce the aerodynamic noise, and improve the sound quality when the air ducts of multiple fans arranged at different horizontal heights of the air conditioner are parallel to the air outlet.

[0063] From the above description, it can be seen that the above-mentioned embodiments of the application achieve the following technical effects:

[0064] The air duct structure of the application comprises a first air duct part 10 and a second air duct part 20, the first air duct part 10 has a first air duct 100, the first air duct 100 has a first fan mounting cavity 101 for mounting a first fan 110, the second air duct part 20 has a second air duct 200, the second air duct 200 has a second fan mounting cavity 201 for mounting a second fan 210, a first plane where the center line of the first fan mounting cavity 101 is located is arranged in parallel with a second plane where the center line of the second fan mounting cavity 201 is located, the distance between the first plane and the second plane is H, wherein the value range of H is: 630mm≥H≥570mm; wherein the center line of the first fan mounting cavity 101 coincides with the rotation axis of the impeller part of the first fan 110, and the center line of the second fan mounting cavity 201 coincides with the rotation axis of the impeller part of the second fan 210; wherein the first air duct part 10 comprises a first upper air duct section 11, a first transition section 12 and a first lower air duct section 13 connected in sequence, the bending angle between the first transition section 12 and the first upper air duct section 11 and / or the bending angle between the first transition section 12 and the first lower air duct section 13 is α; wherein the value range of α is: 40°≥α≥25°, in the air conditioner, if the bending angle α is too large, the structure of the first air duct part 10 in the width direction is not compact enough, and the flow resistance is increased, and the air volume is reduced; and if the bending angle α is too small, under the condition that the height of the main body of the air conditioner indoor unit is unchanged, the length of the straight section of the air duct is short, which is not conducive to the flow of air and the arrangement of the two parallel air ducts. Therefore, the value range of the bending angle α is designed, and the value range of the distance H between the two fan mounting cavities is designed to ensure that the layout of the fan air duct is compact, the flow resistance of the first air duct 100 is reduced, and the air volume is improved.

[0065] Further, the second air duct part 20 comprises a second upper air duct section 21, a second transition section 22 and a second lower air duct section 23 connected in sequence, the bending angle between the second transition section 22 and the second upper air duct section 21 and / or the bending angle between the second transition section 22 and the second lower air duct section 23 is β; wherein the value range of β is: 16°≥β≥0°. In the air conditioner, if the bending angle β is too large, the structure of the second air duct part 20 in the width direction is not compact enough, and the flow resistance of the second air duct is increased, and the air volume is reduced; and if the bending angle β is too small, under the condition that the height of the main body of the air conditioner indoor unit is unchanged, the length of the straight section of the air duct is short, which is not conducive to the flow of air and the arrangement of the two parallel air ducts. Therefore, the value range of the bending angle β is designed, and the value range of the distance H between the two fan mounting cavities and the value range of the bending angle α are designed to further ensure that the layout of the fan air duct is compact, and the flow resistance of the first air duct 100 and the second air duct 200 is reduced, and the air volume is improved.

[0066] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A duct structure comprising a first duct section (10) and a second duct section (20), the first duct section (10) having a first duct (100) having a first fan mounting cavity (101) for mounting a first fan (110), the second duct section (20) having a second duct (200) having a second fan mounting cavity (201) for mounting a second fan (210), characterized in that, The first plane containing the centerline of the first fan mounting cavity (101) is parallel to the second plane containing the centerline of the second fan mounting cavity (201). The distance between the first plane and the second plane is H, where the value of H is in the range of 630mm≥H≥570mm. The centerline of the first fan mounting cavity (101) coincides with the rotation axis of the impeller component of the first fan (110), and the centerline of the second fan mounting cavity (201) coincides with the rotation axis of the impeller component of the second fan (210). The first air duct section (10) includes a first upwind section (11), a first transition section (12), and a first downwind section (13) connected in sequence. The bending angle between the first transition section (12) and the first upwind section (11) and / or the bending angle between the first transition section (12) and the first downwind section (13) is α. The value range of α is: 40°≥α≥25°. The second air duct section (20) includes a second upper air duct section (21), a second transition section (22), and a second lower air duct section (23) connected in sequence. Parts of the air duct sections of the first lower air duct section (13) and the second lower air duct section (23) are separated by a common partition plate body (30). The partition plate body (30) is provided with a connecting opening (300) for connecting the first air duct section (10) and the second air duct section (20). A stop plate (301) is provided in the connecting opening (300). The stop plate (301) is spaced apart from the top and bottom of the connecting opening (300).

2. The air duct structure according to claim 1, characterized in that, The bending angle between the second transition section (22) and the second upwind section (21) and / or the bending angle between the second transition section (22) and the second downwind section (23) is β; wherein, the value range of β is: 16°≥β≥0°.

3. The air duct structure according to claim 1, characterized in that, The air duct structure has an air inlet (40), and at least a portion of the first upwind section (11) is located on one side of the first downwind section (13) along the air inlet (40) direction.

4. The air duct structure according to claim 2, characterized in that, The air duct structure has an air inlet (40), and at least a portion of the second upper air duct section (21) is located on one side of the second lower air duct section (23) along the air inlet (40) air inlet direction.

5. The air duct structure according to claim 2, characterized in that, The air duct structure has an air inlet (40). At least a portion of the first air duct section (10) and at least a portion of the second air duct section (20) are arranged to overlap in projection in a predetermined vertical plane.

6. The air duct structure according to claim 1, characterized in that, The minimum horizontal width of the second downwind section (23) is A, the minimum horizontal width of the first downwind section (13) is B, and the minimum width C at the overlap of the first air duct section (10) and the second air duct section (20) is within the range of: 0.9*(A+B)≥C≥0.8*(A+B).

7. The air duct structure according to claim 1, characterized in that, The length of the partition plate body (30) in the vertical direction is L1; The value range of L1 is: 460mm ≥ L1 ≥ 380mm.

8. The air duct structure according to claim 1, characterized in that, The length of the connecting opening (300) in the vertical direction is L2, and the value range of L2 is: 0.8*L1≥L2≥0.7*L1.

9. The air duct structure according to claim 1, characterized in that, The length of the stop plate (301) in the vertical direction is p; wherein, 120mm ≥ p ≥ 100mm; and / or The vertical distance between the bottom end of the stop plate (301) and the bottom end of the connecting opening (300) is q; wherein, 80mm≥q≥40mm.

10. The air duct structure according to claim 7, characterized in that, The airflow cross section of the first downwind section (13) located at the partition plate part (30) is S1, and the airflow cross section of the second downwind section (23) located at the partition plate part (30) is S2; Where S1:S2=3:

4.

11. The air duct structure according to any one of claims 1 to 10, characterized in that, Both the first fan mounting cavity (101) and the second fan mounting cavity (201) have air outlets, and the width of the air outlet of the first fan mounting cavity (101) is equal to the width of the air outlet of the second fan mounting cavity (201). The width direction of the air outlet of the first fan mounting cavity (101) and the width direction of the air outlet of the second fan mounting cavity (201) are the distribution directions of the first air duct section (10) and the second air duct section (20).

12. The air duct structure according to any one of claims 1 to 10, characterized in that, At least a portion of the first air duct section (10) and at least a portion of the second air duct section (20) are distributed overlappingly along a predetermined direction. The width A of the air duct cavity of the second air duct section (20) along the predetermined direction is 100 mm; and / or The width B of the air duct cavity of the first air duct section (10) along the predetermined direction is 74 mm; and / or The width C of the overlap between the first air duct section (10) and the second air duct section (20) is 175 mm.

13. The air duct structure according to claim 12, characterized in that, A shared partition plate (30) is provided at the overlap of the first air duct section (10) and the second air duct section (20), the partition plate (30) having a vertical length L1 of 440 mm; and / or The partition plate body (30) is provided with a connecting opening (300) for connecting the first air duct (10) and the second air duct (20), and the length of the connecting opening (300) in the vertical direction is L2, which is 330mm.

14. An air conditioner, comprising a housing and an air duct structure disposed within the housing, characterized in that, The air duct structure is the air duct structure according to any one of claims 1 to 13.

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