Air duct component for crossflow impeller and air conditioning equipment having the same

Abstract

The present invention discloses a duct component for a crossflow wind wheel and an air conditioning device having the same, wherein the duct component comprises a first volute portion and a second volute portion. On a cross section perpendicular to the axis of the crossflow wind wheel, the first volute portion and the second volute portion are arranged opposite to each other to define a crossflow wind duct between the first volute portion and the second volute portion. Along the axial direction of the crossflow wind wheel, the crossflow wind duct comprises a middle wind duct section and two end wind duct sections respectively located at both ends of the middle wind duct section. The inner end of the first volute portion has a volute tongue. On a cross section, a vertical line is drawn through the volute tongue to the second volute portion. The portion of the middle wind duct section located downstream of the vertical line is the middle air outlet duct, and the portion of the end wind duct section located downstream of the vertical line is the end air outlet duct. The cross-sectional area of ​​the middle air outlet duct is S1, and the cross-sectional area of ​​the end air outlet duct is S2, and S2<S1. According to the duct component for a crossflow wind wheel of the present invention, the problem of abnormal sound at the air outlet can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air ducts, and in particular to an air duct component for a crossflow wind wheel and an air conditioning device having the same. Background Art

[0002] Some air conditioners in the related art use a crossflow fan wheel to match the crossflow air duct. However, when the crossflow fan wheel is in operation, the gas flow is uneven over the entire length of the crossflow air duct. Due to this uneven flow, abnormal airflow noise may be generated in the crossflow air duct. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an air duct component for a crossflow impeller, which can improve the problem of abnormal sound of air outlet.

[0004] The present invention also provides an air conditioning device having the air duct component.

[0005] According to an embodiment of the first aspect of the present invention, a duct component for a crossflow wind wheel comprises a first volute portion and a second volute portion. On a cross section perpendicular to the axis of the crossflow wind wheel, the first volute portion and the second volute portion are relatively arranged to define a crossflow wind duct between the first volute portion and the second volute portion. Along the axial direction of the crossflow wind wheel, the crossflow wind duct comprises a middle duct section and two end duct sections respectively located at two ends of the middle duct section. The inner end of the first volute portion has a volute tongue. On the cross section, a vertical line is drawn from the volute tongue to the second volute portion. The portion of the middle duct section located downstream of the vertical line is the middle air outlet duct, and the portion of the end duct section located downstream of the vertical line is the end air outlet duct. The cross-sectional area of ​​the middle air outlet duct is S1, and the cross-sectional area of ​​the end air outlet duct is S2, and S2<S1.

[0006] The air duct component for a crossflow impeller according to the embodiment of the present invention can improve the problem of abnormal sound during air flow.

[0007] In some embodiments, along the axial direction of the crossflow wind wheel, the length of the crossflow air duct is W1, the length of the end air duct segment is W2, and 5mm≤W2≤0.3W1.

[0008] In some embodiments, the portion of the volute tongue corresponding to the middle air duct segment is the middle volute tongue segment, the portion of the volute tongue corresponding to the end air duct segment is the end volute tongue segment, the minimum gap between the middle volute tongue segment and the crossflow wind wheel is T1, the minimum gap between the end volute tongue segment and the crossflow wind wheel is T2, and T2>T1.

[0009] In some embodiments, the diameter of the crossflow impeller is D, 0.04D≤T1≤0.06D, 0.04D≤T2≤0.06D.

[0010] In some embodiments, the first volute portion includes a first straight line segment, the volute tongue is connected to the inner end of the first straight line segment, the portion of the first straight line segment corresponding to the middle air duct segment is the first middle straight line segment, the portion of the first straight line segment corresponding to the end air duct segment is the first end straight line segment, and the outer end of the first end straight line segment is located on the side of the outer end of the first middle straight line segment close to the second volute portion.

[0011] In some embodiments, on a cross section perpendicular to the axis of the crossflow impeller, the inner end of the first end straight segment coincides with the inner end of the first middle straight segment, and the angle between the first end straight segment and the first middle straight segment is α1, 3°≤α1≤7°.

[0012] In some embodiments, the portion of the inner end portion of the second volute portion corresponding to the middle air duct segment is the middle inner end segment, the portion of the inner end portion of the second volute portion corresponding to the end air duct segment is the end inner end segment, the minimum gap between the middle inner end segment and the crossflow wind wheel is T3, the minimum gap between the end inner end segment and the crossflow wind wheel is T4, and T4>T3.

[0013] In some embodiments, the diameter of the crossflow impeller is D, 0.04D≤T3≤0.06D, 0.04D≤T4≤0.06D.

[0014] In some embodiments, the second volute portion includes a second straight line segment, the portion of the second straight line segment corresponding to the middle air duct segment is a second middle straight line segment, the portion of the second straight line segment corresponding to the end air duct segment is a second end straight line segment, and the outer end of the second end straight line segment is located on the side of the outer end of the second middle straight line segment close to the first volute portion.

[0015] In some embodiments, on a cross section perpendicular to the axis of the crossflow impeller, the inner end of the second end straight line segment coincides with the inner end of the second middle straight line segment, and the angle between the second end straight line segment and the second middle straight line segment is α2, 3°≤α2≤7°.

[0016] In some embodiments, the portion of the second volute portion corresponding to the middle air duct segment is a second middle volute segment, and the portion of the second volute portion corresponding to the end air duct segment is a second end volute segment. On a cross section perpendicular to the axis of the crossflow wind wheel, the second end volute segment is deflected relative to the second middle volute segment by an angle α3 around the central axis of the crossflow wind wheel in a direction close to the first volute portion, 3°≤α3≤7°.

[0017] In some embodiments, the portion of the first volute portion corresponding to the middle air duct segment is a first middle volute segment, the portion of the first volute portion corresponding to the end air duct segment is a first end volute segment, the portion of the second volute portion corresponding to the middle air duct segment is a second middle volute segment, and the portion of the second volute portion corresponding to the end air duct segment is a second end volute segment, and in a cross section perpendicular to the axis of the crossflow wind wheel, an angle between the first middle volute segment and the second middle volute segment is α4, and an angle between the first end volute segment and the second end volute segment is α5, and α5<α4.

[0018] In some embodiments, 3°≤α5-α4≤7°.

[0019] In some embodiments, 3°≤α4≤20°, 3°≤α5≤20°.

[0020] In some embodiments, on a cross section perpendicular to the axis of the crossflow wind wheel, the length of the vertical line is H, the diameter of the crossflow wind wheel is D, and 0.45D≤H≤0.65D.

[0021] An air conditioning device according to an embodiment of a second aspect of the present invention comprises a crossflow fan wheel and an air duct component for the crossflow fan wheel according to an embodiment of the first aspect of the present invention, wherein the crossflow fan wheel is arranged in the crossflow air duct.

[0022] According to the air conditioning device of the embodiment of the present invention, the problem of abnormal sound of air outlet of the air conditioning device is improved by providing the air duct component for the crossflow impeller of the embodiment of the first aspect mentioned above.

[0023] In some embodiments, the air conditioning equipment is a mobile air conditioner and includes a heat exchanger, wherein the heat exchanger is arranged on the rear side of the crossflow wind wheel, the crossflow wind wheel is arranged at the entrance of the crossflow air duct, and the second volute portion is located on the front side of the first volute portion, wherein the heat exchanger includes a first heat exchange portion extending in a vertical direction, the horizontal distance between the axis of the crossflow wind wheel and the rear surface of the first heat exchange portion is L1, the maximum horizontal distance between the rear surface of the second volute portion and the axis of the crossflow wind wheel is L2, and the diameter of the crossflow wind wheel is D, wherein 0.7D≤L1≤D, and / or, 0.65D≤L2≤D.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic cross-sectional view of an air conditioning device according to an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the cooperation between a crossflow impeller and an air duct component according to an embodiment of the present invention;

[0027] Figure 3 is along Figure 2 Sectional view along line AA;

[0028] Figure 4 is along Figure 2 Sectional view of the middle BB line;

[0029] Figure 5 is a schematic cross-sectional view of an air conditioning device according to another embodiment of the present invention;

[0030] Figure 6 is a schematic cross-sectional view of an air conditioning device according to another embodiment of the present invention;

[0031] Figure 7 is a schematic cross-sectional view of an air conditioning device according to another embodiment of the present invention;

[0032] Figure 8 is a schematic cross-sectional view of an air conditioning device according to another embodiment of the present invention;

[0033] Fig. 9 is a schematic cross-sectional view of an air conditioning device according to another embodiment of the present invention.

[0034] Reference numerals:

[0035] Air conditioning equipment 100;

[0036] Crossflow impeller 10;

[0037] Air duct component 20;

[0038] First volute portion 21; first intermediate volute section 21a; first end volute section 21b;

[0039] Snail tongue 211; middle snail tongue section 211a; end snail tongue section 211b;

[0040] A first straight line segment 212; a first middle straight line segment 212a; a first end straight line segment 212b;

[0041] A second volute portion 22; a second intermediate volute segment 22a; a second end volute segment 22b;

[0042] Middle inner end section 22a1; end inner end section 22b1;

[0043] A second straight line segment 221; a second middle straight line segment 221a; a second end straight line segment 221b;

[0044] Crossflow air duct 23; throat 23a; air inlet 23b; air outlet 23c;

[0045] Middle air duct section 231; middle air outlet duct 231a;

[0046] End air duct section 232; end air outlet duct 232a;

[0047] Heat exchanger 30 ; first heat exchange unit 31 ; second heat exchange unit 32 . DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0049] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0050] Hereinafter, with reference to the accompanying drawings, an air duct component 20 for a crossflow impeller 10 according to an embodiment of the first aspect of the present invention will be described.

[0051] like Figure 1 As shown, the air duct component 20 includes a first volute portion 21 and a second volute portion 22 which are arranged opposite to each other. Figure 1 In the cross section shown in FIG. 1 , the first volute portion 21 and the second volute portion 22 are arranged opposite to each other to define a cross-flow air duct 23 between the first volute portion 21 and the second volute portion 22. Figure 2Along the axial direction of the crossflow impeller 10 , the crossflow air duct 23 includes a middle air duct section 231 and two end air duct sections 232 respectively located at two ends of the middle air duct section 231 .

[0052] For example, Figure 2 In the example shown, when the axial direction of the crossflow impeller 10 is the left-right direction, the crossflow air duct 23 includes a middle air duct section 231 (eg, Figure 2 The area between the line M1 and the line M2 shown in FIG. 2 ), the end duct section 232 located on the left side of the middle duct section 231 (as shown in FIG. 2 ). Figure 2 The area on the left side of the line M1 shown in FIG), and the end duct section 232 located on the right side of the middle duct section 231 (as shown in FIG. Figure 2 (the area to the right of line M2 shown in ).

[0053] like Figure 1 As shown, the inner end of the first volute portion 21 has a volute tongue 211. It should be noted that the "inside" mentioned herein refers to the side close to the air inlet 23b of the crossflow air duct 23, and the "outside" refers to the side close to the air outlet 23c of the crossflow wind wheel 10. In the above cross section, a vertical line L is drawn from the volute tongue 211 to the second volute portion 22. It should be noted that the shortest vertical line among all the vertical lines drawn from each point on the volute tongue 211 to the second volute portion 22 is the above vertical line L, or in other words, the vertical line of the minimum distance from the volute tongue 211 to the second volute portion 22 is the above vertical line L. In addition, it can be understood that the portion of the crossflow air duct 23 at the position of the above-mentioned vertical line L can be called the throat 23a of the crossflow air duct 23. When the crossflow wind wheel 10 is working, the air flow enters the crossflow air duct 23 from the air inlet 23b of the crossflow air duct 23, first flows to the position of the throat 23a of the crossflow air duct 23, and then flows to the air outlet 23c of the crossflow air duct 23.

[0054] like Figure 1 and Figure 2 As shown, the portion of the middle duct section 231 located downstream of the vertical line L is the middle air outlet duct 231a, and the portion of the end duct section 232 located downstream of the vertical line L is the end air outlet duct 232a, that is, the airflow enters the cross-flow duct 23 from the air inlet 23b, a part of it enters the middle duct section 231 of the cross-flow duct 23, and the rest enters the end duct section 232 of the cross-flow duct 23, wherein the airflow entering the middle duct section 231 first flows through the throat 23a position, and then flows to the middle air outlet duct 231a, and the airflow entering the end duct section 232 first flows through the throat 23a position, and then flows to the end air outlet duct 232a.

[0055] like Figure 2-Figure 4 As shown, the cross-sectional area of ​​the middle air outlet duct 231a is S1, and the cross-sectional area of ​​the end air outlet duct 232a is S2, where S2<S1. Figure 1 The middle air duct section 231 is defined between the first volute section 21 and the second volute section 22, which are all solid line segments. Figure 3 Corresponding, attached Figure 3 The shaded area in is the cross-sectional area of ​​the middle air outlet duct 231a; Figure 1 The end air duct section 232 is defined between the first volute section 21 and the second volute section 22 with a dotted line segment. Figure 4 Corresponding, attached Figure 4 The shaded area in the figure is the cross-sectional area of ​​the end outlet duct 232a. Figure 1 The first volute portion 21 with dotted line segments is located on a side of the first volute portion 21 with all solid line segments close to the second volute portion 22, so it can be clearly seen that S2<S1.

[0056] Therefore, according to the air duct component 20 of the embodiment of the present invention, by setting the cross-sectional area S2 of the end air outlet duct 232a to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, the air outlet area at the middle position in the length direction of the cross-flow air duct 23 (i.e., the axial direction of the cross-flow wind wheel 10) is larger and can match a larger air outlet wind speed, and the air outlet areas at the two ends are smaller and can match a smaller air outlet wind speed, so that the airflow load within the entire length range of the cross-flow air duct 23 is basically the same, the gas flow is more uniform, and the problem of abnormal air supply noise at the two ends of the cross-flow air duct 23 can be effectively improved.

[0057] Some air conditioners in the related art use a crossflow fan wheel to match the crossflow duct. However, when the crossflow fan wheel is working, the gas flow is uneven throughout the entire length of the crossflow duct. Due to this uneven flow, the problem of abnormal airflow noise will be generated in the crossflow duct. The inventor found that the length of the crossflow fan wheel is smaller than that of the crossflow duct. Affected by the walls on both sides of the crossflow duct, the wind speed at the middle position in the length direction of the crossflow duct (i.e., the axial direction of the crossflow fan wheel) is larger, and the wind speed close to the walls on both sides is smaller.

[0058] However, since the cross-sections of the volute tongue and the volute of the crossflow air duct in the related technology are the same at different length positions, the projection curves of the crossflow air duct at each location on the cross-section perpendicular to the axis of the crossflow wind wheel are coincident, so that the air outlet area of ​​the crossflow air duct in the entire length direction is the same. Therefore, the airflow load is different throughout the entire length of the crossflow air duct, and the gas flow is uneven, resulting in mismatch between the airflow and the air duct load on both sides, thereby causing discontinuous airflow sound on both sides of the crossflow air duct and abnormal airflow sound problems.

[0059] According to the air duct component 20 of the embodiment of the present invention, by setting the cross-sectional area S2 of the end air outlet duct 232a to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, the air outlet cross-section of the cross-flow duct 23 is different throughout the entire length and is designed as a variable cross-section, so that the middle air outlet duct 231a with a larger cross-sectional area can be used to adapt to a larger air outlet speed, and the end air outlet duct 232a with a smaller cross-sectional area can be used to adapt to a smaller air outlet speed. In other words, by setting the cross-flow duct 23 to a variable cross-sectional structure, the middle air outlet duct 231a with a larger cross-sectional area is matched at a position with a larger middle wind speed, and the end air outlet duct 232a with a smaller cross-sectional area is matched at positions with smaller wind speeds on both sides. In this way, it can be ensured that the airflow load throughout the entire length of the cross-flow duct 23 is basically the same and the gas flow is relatively uniform, thereby reducing the discontinuous airflow sound generated on both sides of the cross-flow duct 23 and improving the problem of abnormal airflow sound.

[0060] It should be noted that, in an embodiment of the present invention, in order to achieve "the cross-sectional area S2 of the end air outlet duct 232a is smaller than the cross-sectional area S1 of the middle air outlet duct 231a, so that the air outlet cross-section of the cross-flow air duct 23 is different within the entire length range and is designed as a variable cross-section", the present invention proposes the following specific schemes, such as setting the first volute portion 21 and / or the second volute portion 22 to a variable cross-section design along the axial direction of the cross-flow wind wheel 10, that is, the first volute portion 21 and / or the second volute portion 22 can be set along the axial direction of the cross-flow wind wheel 10, with different cross-sectional shapes in the middle and at both ends, so as to adapt to load changes at different positions, and can effectively eliminate the problem of abnormal air supply noise on both sides of the cross-flow air duct 23.

[0061] More specifically, by setting the first volute portion 21 and / or the second volute portion 22 to a variable cross-section design along the axial direction of the crossflow impeller 10, the influence of the end walls on the air volume of the crossflow duct 23 can be accommodated, so that the gas flow of the entire crossflow duct 23 in the entire length direction (i.e., the axial direction of the crossflow impeller 10) is more uniform, and the characteristics of the crossflow duct 23 with a higher wind speed in the middle and a lower wind speed on both sides can be accommodated, thereby improving the noise generated by the uneven airflow on both sides of the crossflow duct 23. In addition, it should be noted that the variable cross-section of the first volute portion 21 and the variable cross-section of the second volute portion 22 can be transitioned by a smooth curved surface or a stepped surface, which is not limited here.

[0062] In some embodiments of the present invention, Figure 2As shown, along the axial direction of the crossflow wind wheel 10, the length of the crossflow wind duct 23 is W1, the length of the end wind duct section 232 is W2, and 5mm≤W2≤0.3W1. In other words, the length W2 of the end wind duct section 232 is less than or equal to 0.3 times the axial length of the crossflow wind duct 23, and the length W2 of the end wind duct section 232 is greater than or equal to 5 mm. In this way, the effect of the large length of the end wind duct section 232 on the air outlet of the middle wind duct section 231 can be avoided, and the problem of the lack of obvious improvement effect on the abnormal sound on both sides caused by the small length of the end wind duct section 232 can also be avoided.

[0063] However, the present invention is not limited thereto, and the length of the end duct segment 232 is the length of W2 and can be adjusted according to actual conditions, which will not be described in detail here. In addition, it should be noted that the length of each end duct segment 232 only needs to meet this value, but the lengths of the two end duct segments 232 are not required to be consistent, and can be equal or unequal.

[0064] In some embodiments of the present invention, Figure 1 , Figure 3 and Figure 4 As shown, the portion of the volute tongue 211 corresponding to the middle air duct segment 231 is the middle volute tongue segment 211a, and the portion of the volute tongue 211 corresponding to the end air duct segment 232 is the end volute tongue segment 211b. The minimum gap between the middle volute tongue segment 211a and the crossflow wind wheel 10 is T1, and the minimum gap between the end volute tongue segment 211b and the crossflow wind wheel 10 is T2. Figure 1 , T2>T1. It can be understood that the inner end of the first volute portion 21 is the volute tongue 211 , and the volute tongue 211 and the inner end of the second volute portion 22 define an air inlet 23 b of the cross-flow air duct 23 .

[0065] Therefore, by setting the volute tongue 211 as a variable cross-section structure with a smaller gap between the middle part and the crossflow wind wheel 10 and a larger gap between the two end parts and the crossflow wind wheel 10, it can effectively adapt to the characteristics of the crossflow wind duct 23 with smaller air volume on both sides and larger air volume in the middle, and improve the air volume uniformity of the crossflow wind duct 23 in the entire length direction to a certain extent (that is, due to the air flow loss on both sides of the crossflow wind duct 23, the air volume is small, and by increasing the air inlet gap on both sides, the air inlet resistance on both sides can be reduced, thereby increasing the air inlet volume on both sides), and reduce the noise of the air duct component 20 to a certain extent. It can be understood that in this embodiment, along the axial direction of the crossflow wind wheel 10, the first volute part 21 is a variable cross-section design, and the minimum distance from the volute tongue 211 to the crossflow wind wheel 10, as well as the minimum distance position, the angle and shape of the volute tongue 211 can be different at the two end positions and the middle position.

[0066] In some embodiments of the present invention, Figure 1As shown, when the diameter of the crossflow impeller 10 is D, 0.04D≤T2≤0.06D, 0.04D≤T1≤0.06D. Therefore, although the minimum distance between the volute tongue 211 and the crossflow impeller 10 varies, that is, it is different at the two ends and the middle, it is within the range of 0.04D-0.06D, for example, the gap can be 0.04D, 0.045D, 0.05D, 0.055D, 0.06D, etc., so as to ensure that the performance of the crossflow air duct 23 is better.

[0067] like Figure 1 As shown, the first volute portion 21 includes a first straight segment 212, and the volute tongue 211 is connected to the inner end of the first straight segment 212. Figure 3 and Figure 4 , the portion of the first straight line segment 212 corresponding to the middle air duct segment 231 is the first middle straight line segment 212a, and the portion of the first straight line segment 212 corresponding to the end air duct segment 232 is the first end straight line segment 212b. Figure 5 The outer end of the first end straight line segment 212 b is located on a side of the outer end of the first middle straight line segment 212 a close to the second volute portion 22 .

[0068] In this way, it is possible to simply and effectively ensure that the cross-sectional area S2 of the end air outlet duct 232a is set to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, so as to match the middle air outlet duct 231a with a larger cross-sectional area at the position with higher wind speed in the middle, and match the end air outlet duct 232a with a smaller cross-sectional area at the positions with lower wind speed on both sides. In this way, it can be ensured that the airflow load within the entire length of the cross-flow duct 23 is basically the same and the gas flow is relatively uniform, thereby reducing the discontinuous airflow sound generated on both sides of the cross-flow duct 23 and improving the problem of abnormal airflow noise.

[0069] In some embodiments of the present invention, Figure 5 As shown, on a cross section perpendicular to the axis of the crossflow impeller 10, the inner end of the first end straight segment 212b coincides with the inner end of the first middle straight segment 212a, and the angle between the first end straight segment 212b and the first middle straight segment 212a is α1, 3°≤α1≤7°, for example, α1 can be 3°, 4°, 5°, 6°7°, etc. In other words, the first middle straight segment 212a is rotated α1 with its inner end as the rotation center toward the direction close to the second volute portion 22, to obtain the first end straight segment 212b. It can be understood that Figure 5 The first straight line segment 212 of the dashed line represents the first end straight line segment 212 b , and the first straight line segment 212 of the solid line represents the first middle straight line segment 212 a .

[0070] This shows that there is a difference angle of 3°-7° between the first end straight segment 212b and the first middle straight segment 212a, so that the cross-sectional area S2 of the end air outlet duct 232a can be simply and effectively set to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, so as to match the middle air outlet duct 231a with a larger cross-sectional area at the position with a larger wind speed in the middle, and match the end air outlet duct 232a with a smaller cross-sectional area at the positions with smaller wind speeds on both sides, so that the airflow load within the entire length of the crossflow duct 23 can be ensured to be basically the same, and the gas flow is relatively uniform, thereby reducing the discontinuous airflow sound generated on both sides of the crossflow duct 23 and improving the problem of abnormal airflow sound. And avoid the problem that the difference angle between the first end straight segment 212b and the first middle straight segment 212a is too large, which affects the normal airflow on both sides.

[0071] In some embodiments of the present invention, Figure 6 As shown, the portion of the inner end of the second volute portion 22 corresponding to the middle air duct segment 231 is the middle inner end segment 22a1, the portion of the inner end of the second volute portion 22 corresponding to the end air duct segment 232 is the end inner end segment 22b1, the minimum gap between the middle inner end segment 22a1 and the crossflow impeller 10 is T3, the minimum gap between the end inner end segment 22b1 and the crossflow impeller 10 is T4, T4>T3. It can be understood that, Figure 6 The middle dashed line represents the middle inner end section 22a1, and the solid line represents the end inner end section 22b1.

[0072] Thus, by setting the inner end of the second volute portion 22 to a variable cross-section structure with a smaller gap between the middle portion and the crossflow impeller 10 and a larger gap between the two end portions and the crossflow impeller 10, it is possible to effectively adapt to the characteristics of the crossflow duct 23 with a smaller air volume on both sides and a larger air volume in the middle, and to improve the air volume uniformity of the crossflow duct 23 in the entire length direction to a certain extent (i.e., due to the air flow loss on both sides of the crossflow duct 23, the air volume is small, and by increasing the air inlet gaps on both sides, the air inlet resistance on both sides can be reduced, thereby increasing the air inlet volume on both sides), and to reduce the noise of the air duct component 20 to a certain extent. It can be understood that in this embodiment, along the axial direction of the crossflow impeller 10, the second volute portion 22 is a variable cross-section design, and the minimum distance from the inner end of the second volute portion 22 to the crossflow impeller 10, as well as the minimum distance position, the angle and shape of the second volute portion 22 can be different at the two end positions and the middle position.

[0073] In some embodiments of the present invention, Figure 6As shown, the diameter of the crossflow impeller 10 is D, 0.04D≤T3≤0.06D, 0.04D≤T4≤0.06D. Therefore, although the minimum distance from the inner end of the second volute portion 22 to the crossflow impeller 10 is variable, that is, different at both ends and in the middle, it is within the range of 0.04D-0.06D, for example, the gap can be 0.04D, 0.045D, 0.05D, 0.055D, 0.06D, etc., so as to ensure that the performance of the crossflow air duct 23 is better.

[0074] In some embodiments of the present invention, Figure 7 As shown, the second volute portion 22 includes a second straight segment 221, a portion of the second straight segment 221 corresponding to the middle air duct segment 231 is a second middle straight segment 221a, a portion of the second straight segment 221 corresponding to the end air duct segment 232 is a second end straight segment 221b, and the outer end of the second end straight segment 221b is located at a side of the outer end of the second middle straight segment 221a close to the first volute portion 21. Thus, it can be simply and effectively ensured that the cross-sectional area S2 of the end air outlet duct 232a is set to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, so as to match the middle air outlet duct 231a with a larger cross-sectional area at the position with a larger middle wind speed, and match the end air outlet duct 232a with a smaller cross-sectional area at the positions with a smaller wind speed on both sides, so as to ensure that the airflow load within the entire length range of the crossflow duct 23 is basically the same and the gas flow is relatively uniform, thereby reducing the discontinuous airflow sound generated on both sides of the crossflow duct 23 and improving the problem of abnormal airflow sound.

[0075] In some embodiments of the present invention, Figure 7 As shown, on a cross section perpendicular to the axis of the crossflow impeller 10, the inner end of the second end straight segment 221b coincides with the inner end of the second middle straight segment 221a, and the angle between the second end straight segment 221b and the second middle straight segment 221a is α2, 3°≤α2≤7°, for example, α2 can be 3°, 4°, 5°, 6°7°, etc. In other words, the second middle straight segment 221a is rotated α2 with its inner end as the rotation center toward the direction close to the first volute portion 21, to obtain the second end straight segment 221b. It can be understood that Figure 7 The solid line represents the second end straight line segment 221b, and the dotted line represents the second middle straight line segment 221a.

[0076] This shows that there is a difference angle of 3°-7° between the second end straight segment 221b and the second middle straight segment 221a, so that the cross-sectional area S2 of the end air outlet duct 232a can be simply and effectively set to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, so as to match the middle air outlet duct 231a with a larger cross-sectional area at the position with a larger wind speed in the middle, and match the end air outlet duct 232a with a smaller cross-sectional area at the positions with smaller wind speeds on both sides, so that the airflow load within the entire length of the crossflow duct 23 can be basically the same, and the gas flow is relatively uniform, thereby reducing the discontinuous airflow sound generated on both sides of the crossflow duct 23 and improving the problem of abnormal airflow sound. And avoid the problem that the difference angle between the second end straight segment 221b and the second middle straight segment 221a is too large, which affects the normal airflow on both sides.

[0077] In some embodiments of the present invention, Figure 8 As shown, the portion of the second volute portion 22 corresponding to the middle air duct segment 231 is the second middle volute segment 22a, and the portion of the second volute portion 22 corresponding to the end air duct segment 232 is the second end volute segment 22b. On the cross section perpendicular to the axis of the crossflow wind wheel 10, the second end volute segment 22b is deflected by an angle α3 relative to the second middle volute segment 22a around the central axis of the crossflow wind wheel 10 toward the direction close to the first volute portion 21, 3°≤α3≤7°, for example, α3 can be 3°, 4°, 5°, 6°7°, etc. In other words, the second middle volute segment 22a rotates by α3 toward the direction close to the first volute portion 21 with the axis of the crossflow wind wheel 10 as the rotation center, to obtain the second end volute segment 22b. It can be understood that Figure 8 The solid line represents the second end volute segment 22b, and the dashed line represents the second intermediate volute segment 22a.

[0078] This shows that there is a difference angle of 3°-7° around the axis of the crossflow impeller 10 between the second end volute section 22b and the second middle volute section 22a, so that the cross-sectional area S2 of the end air outlet duct 232a can be simply and effectively set to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, so as to match the middle air outlet duct 231a with a larger cross-sectional area at the position with a larger wind speed in the middle, and match the end air outlet duct 232a with a smaller cross-sectional area at the positions with smaller wind speeds on both sides, so that the airflow load within the entire length of the crossflow duct 23 can be basically the same, and the gas flow is relatively uniform, thereby reducing the discontinuous airflow sound generated on both sides of the crossflow duct 23 and improving the problem of abnormal airflow sound. And avoid the problem that the difference angle between the second end volute section 22b and the second middle volute section 22a is too large, which affects the normal airflow on both sides.

[0079] In some embodiments of the present invention, Figure 3As shown, the portion of the first volute portion 21 corresponding to the intermediate air duct segment 231 is the first intermediate volute segment 21a, and the portion of the second volute portion 22 corresponding to the intermediate air duct segment 231 is the second intermediate volute segment 22a. Figure 4 As shown, the portion of the first volute portion 21 corresponding to the end air duct segment 232 is the first end volute segment 21b, and the portion of the second volute portion 22 corresponding to the end air duct segment 232 is the second end volute segment 22b. In the cross section perpendicular to the axis of the crossflow impeller 10, the Figure 8 The included angle between the first middle volute segment 21a and the second middle volute segment 22a is α4, the included angle between the first end volute segment 21b and the second end volute segment 22b is α5, and α5<α4.

[0080] It is understandable that, combined with Figure 3 and Figure 4 The first intermediate volute segment 21a includes a first intermediate straight segment 212a, the first end volute segment 21b includes a first end straight segment 212b, the second intermediate volute segment 22a includes a second intermediate straight segment 221a, and the second end volute segment 22b includes a second end straight segment 221b. The angle between the first intermediate volute segment 21a and the second intermediate volute segment 22a is α4, which is the angle between the first intermediate straight segment 212a and the second intermediate straight segment 221a. The angle between the first end volute segment 21b and the second end volute segment 22b is α5, which is the angle between the first end straight segment 212b and the second end straight segment 221b.

[0081] In this way, it is possible to simply and effectively ensure that the cross-sectional area S2 of the end air outlet duct 232a is set to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, so as to match the middle air outlet duct 231a with a larger cross-sectional area at the position with higher wind speed in the middle, and match the end air outlet duct 232a with a smaller cross-sectional area at the positions with lower wind speed on both sides. In this way, it can be ensured that the airflow load within the entire length of the cross-flow duct 23 is basically the same and the gas flow is relatively uniform, thereby reducing the discontinuous airflow sound generated on both sides of the cross-flow duct 23 and improving the problem of abnormal airflow noise.

[0082] In some embodiments, 3°≤α5-α4≤7°, that is, the angle between the first volute portion 21 and the second volute portion 22 has a difference of 3°-7° at both ends and in the middle, for example, the difference may be 3°, 4°, 5°, 6°, 7°, thereby reducing the discontinuous airflow sound generated on both sides of the crossflow duct 23 and improving the problem of abnormal airflow sound. In addition, the problem of the difference being too large, which affects the normal airflow on both sides, can be avoided.

[0083] In some embodiments of the present invention, Figure 8As shown, 3°≤α4≤20°, 3°≤α5≤20°, for example, α4 and α5 can be 3°, 6°, 9°, 12°, 15°, 20°, etc. Therefore, although the angles between the first volute portion 21 and the second volute portion 22 are different at both ends and in the middle, they are both within the range of 3°-20°, thereby ensuring that the performance of the crossflow duct 23 is better.

[0084] In some embodiments of the present invention, Fig. 9 As shown, on the cross section perpendicular to the axis of the crossflow impeller 10, the length of the vertical line L is H, that is, the dimension from the first volute portion 21 to the second volute portion 22 at the throat 23a of the crossflow air duct 23 is H, or the minimum dimension from the first volute portion 21 to the second volute portion 22 is H, and the diameter of the crossflow impeller 10 is D, 0.45D≤H≤0.65D. In this way, the problem of small air volume caused by too small H can be avoided, and the problem of abnormal sound caused by too large H can also be avoided.

[0085] Hereinafter, an air conditioning device 100 according to an embodiment of a second aspect of the present invention will be described with reference to the accompanying drawings.

[0086] like Fig. 9 As shown, the air conditioning device 100 according to the embodiment of the present invention may include a crossflow fan wheel 10 and an air duct component 20 for the crossflow fan wheel 10 according to any embodiment of the first aspect of the present invention, and the crossflow fan wheel 10 is arranged in the crossflow air duct 23. For example, in some embodiments, the crossflow fan wheel 10 may be arranged at the air inlet 23b of the crossflow air duct 23.

[0087] Therefore, according to the air conditioning equipment 100 of the embodiment of the present invention, by setting the cross-sectional area S2 of the end air outlet duct 232a to be smaller than the cross-sectional area S1 of the middle air outlet duct 231a, the air outlet area at the middle position in the length direction of the cross-flow air duct 23 (i.e., the axial direction of the cross-flow wind wheel 10) is larger and can match a larger air outlet wind speed, and the air outlet areas at the two ends are smaller and can match a smaller air outlet wind speed, so that the air flow load within the entire length range of the cross-flow air duct 23 is basically the same, the gas flow is more uniform, and the problem of abnormal air supply noise generated at the two ends of the cross-flow air duct 23 can be effectively improved.

[0088] It should be noted that the specific type of the air conditioning device 100 according to the embodiment of the present invention is not limited. For example, it can be an air conditioner or an air disinfector. When the air conditioning device 100 is an air conditioner, the air conditioning device 100 can also include a heat exchanger 30, which can be arranged upstream and / or downstream of the air duct component 20, so that the air conditioner can adjust the air temperature. When the air conditioning device 100 is an air disinfector, the air conditioning device 100 can also include a disinfection device, which can be arranged upstream and / or downstream of the air duct component 20, so that the air disinfector can sterilize and disinfect the air.

[0089] In addition, it should be noted that when the air conditioning device 100 is an air conditioner, the specific type of the air conditioner is not limited, and it can be an indoor unit of an air conditioner in a split unit (including a cabinet unit and a wall unit, etc.), or a mobile air conditioner or a window air conditioner in an integrated unit, etc. When the specific type of the air conditioning device 100 is determined, other structures and operations of the air conditioning device 100 according to the embodiment of the present invention are known to those skilled in the art, and will not be described in detail here.

[0090] For example, in some embodiments of the present invention, Fig. 9 As shown, the air conditioning device 100 is a mobile air conditioner and includes a heat exchanger 30, which is arranged on the rear side of the crossflow impeller 10, and the crossflow impeller 10 is arranged at the entrance of the crossflow air duct 23. The second volute portion 22 is located on the front side of the first volute portion 21, wherein the heat exchanger 30 includes a first heat exchange portion 31 extending in a vertical direction, a horizontal distance between the axis of the crossflow impeller 10 and the rear surface of the first heat exchange portion 31 is L1, and a maximum horizontal distance between the rear surface of the second volute portion 22 and the axis of the crossflow impeller 10 is L2, that is, a horizontal distance from the outer edge of the heat exchanger 30 to the center of the crossflow impeller 10 is L1, a maximum horizontal distance from the inner surface of the second volute portion 22 to the center of the crossflow impeller 10 is L2, and a diameter of the crossflow impeller 10 is D.

[0091] In some embodiments, 0.7D≤L1≤D, thereby avoiding the problem of abnormal noise caused by too small L1 and high speed of gas passing through the heat exchanger 30, as well as the problem of large size and increased cost of the whole machine caused by too large L1. In some embodiments, 0.65D≤L2≤D, thereby avoiding the problem of abnormal noise caused by too small L2 and the problem of large size and increased cost of the whole machine caused by too large L2.

[0092] In order to meet the cost and appearance requirements, the mobile air conditioners in the related art usually have very small and compact space dimensions. This will result in a small distance from the heat exchanger to the crossflow impeller, a high air flow velocity through the heat exchanger, a "humming" sound, and the performance advantages of the crossflow duct cannot be maximized.

[0093] The mobile air conditioner according to the above embodiment of the present invention provides a crossflow air duct 23 with rear air intake and front and upper air outlet. Through the reasonable design of the crossflow air duct 23, the heat exchanger 30, and the crossflow wind wheel 10, for example: D=126mm, L1=104.7mm, L2=97mm, H=63mm, the angle between the first intermediate volute section 21a and the second intermediate volute section 22a is α4=14.16°, thereby greatly improving the performance of the crossflow air duct 23 and improving the abnormal sound of the air duct. For example, compared with the conventional crossflow duct, the noise can be reduced by 2dB-2.5dB at basically the same air volume.

[0094] Furthermore, in some embodiments of the present invention, Fig. 9 As shown, in addition to the vertically arranged first heat exchange part 31, the heat exchanger 30 may also include a second heat exchange part 32 located below the first heat exchange part 31 and arranged obliquely, thereby enhancing the heat exchange effect. Of course, the heat exchanger 30 may also be in other forms, which will not be elaborated here.

[0095] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “lower”, “front”, “left”, “right”, and “axial” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0097] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air duct component for a crossflow impeller, characterized in that: The air duct component includes a first volute portion and a second volute portion. In a cross section perpendicular to the axis of the crossflow wind wheel, the first volute portion and the second volute portion are arranged opposite to each other to define a crossflow air duct between the first volute portion and the second volute portion. Along the axial direction of the crossflow wind wheel, the crossflow air duct includes a middle air duct section and two end air duct sections respectively located at both ends of the middle air duct section. The inner end of the first volute portion has a volute tongue. On the cross section, a vertical line is drawn from the volute tongue to the second volute portion. The portion of the middle duct section located downstream of the vertical line is the middle air outlet duct. The portion of the end duct section located downstream of the vertical line is the end air outlet duct. The cross-sectional area of ​​the middle air outlet duct is S1, and the cross-sectional area of ​​the end air outlet duct is S2, where S2<S1. Wherein, the first volute portion comprises a first straight line segment, and the volute tongue is connected to the inner end of the first straight line segment; The portion of the inner end portion of the second volute portion corresponding to the middle air duct segment is the middle inner end segment, and the portion of the inner end portion of the second volute portion corresponding to the end air duct segment is the end inner end segment. The minimum gap between the middle inner end segment and the crossflow wind wheel is T3, and the minimum gap between the end inner end segment and the crossflow wind wheel is T4, and T4>T3.

2. The air duct component for a crossflow impeller according to claim 1, characterized in that: Along the axial direction of the crossflow wind wheel, the length of the crossflow air duct is W1, the length of the end air duct section is W2, and 5mm≤W2≤0.3W1.

3. The air duct component for a crossflow impeller according to claim 1, characterized in that: The portion of the volute tongue corresponding to the middle air duct segment is the middle volute tongue segment, the portion of the volute tongue corresponding to the end air duct segment is the end volute tongue segment, the minimum gap between the middle volute tongue segment and the crossflow wind wheel is T1, the minimum gap between the end volute tongue segment and the crossflow wind wheel is T2, and T2>T1.

4. The air duct component for a crossflow impeller according to claim 3, characterized in that: The diameter of the crossflow impeller is D, 0.04D≤T1≤0.06D, 0.04D≤T2≤0.06D.

5. The air duct component for a crossflow impeller according to claim 1, characterized in that: The part of the first straight line segment corresponding to the middle air duct segment is the first middle straight line segment, and the part of the first straight line segment corresponding to the end air duct segment is the first end straight line segment. The outer end of the first end straight line segment is located on the side of the outer end of the first middle straight line segment close to the second volute portion.

6. The air duct component for a crossflow impeller according to claim 5, characterized in that: On a cross section perpendicular to the axis of the crossflow impeller, the inner end of the first end straight segment coincides with the inner end of the first middle straight segment, and the angle between the first end straight segment and the first middle straight segment is α1, 3°≤α1≤7°.

7. The air duct component for a crossflow impeller according to claim 1, characterized in that: The diameter of the crossflow impeller is D, 0.04D≤T3≤0.06D, 0.04D≤T4≤0.06D.

8. The air duct component for a crossflow impeller according to claim 1, characterized in that: The second volute portion includes a second straight line segment, the portion of the second straight line segment corresponding to the middle air duct segment is a second middle straight line segment, the portion of the second straight line segment corresponding to the end air duct segment is a second end straight line segment, and the outer end of the second end straight line segment is located on the side of the outer end of the second middle straight line segment close to the first volute portion.

9. The air duct component for a crossflow impeller according to claim 8, characterized in that: On a cross section perpendicular to the axis of the crossflow impeller, the inner end of the second end straight segment coincides with the inner end of the second middle straight segment, and the angle between the second end straight segment and the second middle straight segment is α2, 3°≤α2≤7°.

10. The air duct component for a crossflow impeller according to claim 1, characterized in that: The part of the second volute portion corresponding to the middle air duct section is the second middle volute section, and the part of the second volute portion corresponding to the end air duct section is the second end volute section. On a cross section perpendicular to the axis of the crossflow wind wheel, the second end volute section is deflected relative to the second middle volute section at an angle α3 around the central axis of the crossflow wind wheel in a direction close to the first volute portion, 3°≤α3≤7°.

11. The air duct component for a crossflow impeller according to claim 1, characterized in that: The part of the first volute portion corresponding to the middle air duct section is the first middle volute section, the part of the first volute portion corresponding to the end air duct section is the first end volute section, the part of the second volute portion corresponding to the middle air duct section is the second middle volute section, and the part of the second volute portion corresponding to the end air duct section is the second end volute section. On the cross section perpendicular to the axis of the crossflow wind wheel, the angle between the first middle volute section and the second middle volute section is α4, and the angle between the first end volute section and the second end volute section is α5, and α5<α4.

12. The air duct component for a crossflow impeller according to claim 11, characterized in that: 3°≤α5-α4≤7°。 13. The air duct component for a crossflow impeller according to claim 11, characterized in that: 3°≤α4≤20°，3°≤α5≤20°。 14. The wind duct component for a crossflow wind wheel according to any one of claims 1 to 13, characterized in that: On a cross section perpendicular to the axis of the crossflow wind wheel, the length of the vertical line is H, the diameter of the crossflow wind wheel is D, and 0.45D≤H≤0.65D.

15. An air conditioning device, characterized in that: The invention comprises a crossflow wind wheel and an air duct component for the crossflow wind wheel according to any one of claims 1 to 14, wherein the crossflow wind wheel is arranged in the crossflow air duct.

16. The air conditioning device according to claim 15, characterized in that: The air conditioning equipment is a mobile air conditioner and includes a heat exchanger, which is arranged on the rear side of the crossflow wind wheel, and the crossflow wind wheel is arranged at the entrance of the crossflow air duct. The second volute portion is located on the front side of the first volute portion, wherein the heat exchanger includes a first heat exchange portion extending in a vertical direction, the horizontal distance between the axis of the crossflow wind wheel and the rear surface of the first heat exchange portion is L1, the maximum horizontal distance between the rear surface of the second volute portion and the axis of the crossflow wind wheel is L2, and the diameter of the crossflow wind wheel is D, wherein 0.7D≤L1≤D, and / or, 0.65D≤L2≤D.

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