Air duct component for crossflow impeller and air conditioner having the same

Abstract

The present invention discloses an air duct component for a crossflow fan wheel and an air conditioner having the same, wherein the air duct component defines a crossflow fan and an air outlet fan, the crossflow fan is suitable for setting the crossflow fan wheel, the air outlet fan is connected to the crossflow fan, and on a cross section perpendicular to the axis of the crossflow fan, the air duct component includes a volute portion and a volute tongue portion that are relatively arranged, the volute tongue portion includes a windward surface and a wind guide surface, the windward surface is suitable for defining the crossflow fan with the volute portion, the wind guide surface is suitable for defining the air outlet fan with the volute portion, one end of the windward surface close to the volute portion intersects with one end of the wind guide surface close to the volute portion to form a tongue tip vertex, the intersection of the tangent of the windward surface and the tangent of the wind guide surface is the intersection point, and the tongue tip vertex is located on the side of the intersection point close to the volute portion. According to the air duct component for a crossflow fan wheel of the present invention, when the airflow in the crossflow fan arrives near the tongue tip vertex, it can be more smoothly diverted by the volute tongue portion, thereby achieving the effect of improving the air supply efficiency.

Description

Technical Field

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

[0002] Some air conditioners in the related art are provided with a crossflow impeller and an air duct component for the crossflow impeller. However, these air duct components have a large airflow resistance at the volute tongue, which causes the airflow to be unable to be smoothly diverted at the volute tongue, resulting in a large aerodynamic loss, which affects the air supply efficiency of the entire air conditioner. 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 provides an air duct component, which can smoothly split the airflow at the volute tongue.

[0004] The present invention also provides an air conditioner having the above-mentioned air duct component.

[0005] According to an embodiment of the first aspect of the present invention, a duct component for a crossflow wind wheel, the duct component defines a crossflow wind duct and an outlet wind duct, the crossflow wind duct is suitable for setting a crossflow wind wheel, and the outlet wind duct is connected to the crossflow wind duct, and on a cross section perpendicular to the axis of the crossflow wind duct, the duct component includes a volute portion and a volute tongue portion relatively arranged, the volute tongue portion includes a windward surface and a wind guiding surface, the windward surface is suitable for defining the crossflow wind duct with the volute portion, and the wind guiding surface is suitable for defining the outlet wind duct with the volute portion, an end of the windward surface close to the volute portion intersects with an end of the wind guiding surface close to the volute portion to form a tongue tip apex, the intersection of the tangent of the windward surface and the tangent of the wind guiding surface is the intersection point, and the tongue tip apex is located on the side of the intersection point close to the volute portion.

[0006] According to the air duct component for the crossflow wind wheel of the present invention, by arranging the tip apex of the volute tongue portion on the side of the volute case portion adjacent to the intersection of the tangent of the windward surface and the tangent of the wind guide surface, the wind resistance at the tip apex can be reduced. When the airflow in the crossflow air duct comes near the tip apex of the tongue, it can be more smoothly diverted by the volute tongue, thereby achieving the effect of improving the air supply efficiency.

[0007] In some embodiments, the distance between the apex of the tongue tip and the intersection point is S1, the minimum gap between the windward surface and the crossflow impeller is S2, and S1 is smaller than S2.

[0008] In some embodiments, the S1 is greater than 1 / 3 times the S2.

[0009] In some embodiments, the minimum distance between the apex of the tongue tip and the crossflow impeller is S3, and S3 is greater than 1.5 times of S2.

[0010] In some embodiments, the distance between the apex of the tongue tip and the intersection point is S1, 2mm≤S1≤3mm.

[0011] In some embodiments, the distance between the apex of the tongue tip and the intersection point is S1, the length of the line connecting the apex of the tongue tip and the center of the cross-flow air duct is X1, the length of the line connecting the intersection point and the center of the cross-flow air duct is X2, and the absolute value of the difference between X2 and X1 is less than S1.

[0012] In some embodiments, the X1 is smaller than the X2.

[0013] In some embodiments, the tongue tip angle of the volute tongue portion is a, the angle between the tangent of the windward surface and the tangent of the wind guide surface is a1, and a is smaller than a1.

[0014] In some embodiments, the tongue tip angle of the snail tongue portion is a, and a<55°.

[0015] In some embodiments, 50°<a<55°.

[0016] In some embodiments, an auxiliary circle is drawn with the intersection point as the center and the minimum distance between the intersection point and the crossflow impeller as the radius. Within the auxiliary circle area, the distance between the windward surface and the wind guide surface gradually decreases in the direction approaching the apex of the tongue tip.

[0017] An air conditioner according to an embodiment of the second aspect of the present invention comprises: a crossflow fan wheel and an air duct component, wherein the air duct component is the air duct component for the crossflow fan wheel according to the embodiment of the first aspect of the present invention, and the crossflow fan wheel is arranged in the crossflow air duct.

[0018] According to the air conditioner of the present invention, the air duct component of the first embodiment is provided, so that the air supply efficiency can be improved.

[0019] 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

[0020] Figure 1 is a schematic diagram of an air duct component according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A partial enlarged view of the air duct component shown in ;

[0022] Figure 3 yes Figure 1 A partial enlarged view of the air duct component shown in ;

[0023] Figure 4 yes Figure 1 A partial enlarged view of the air duct component shown in ;

[0024] Figure 5 yes Figure 1 A partial enlarged view of the air duct component shown in ;

[0025] Figure 6 yes Figure 1 A partial enlarged view of the air duct component shown in ;

[0026] Figure 7 is a schematic diagram of an air duct component in the related art;

[0027] Figure 8 yes Figure 7 The simulation calculation streamline diagram of the air duct component shown in ;

[0028] Fig. 9 yes Figure 7 The simulation calculation pressure diagram of the air duct component shown in;

[0029] Fig.10 is a schematic cross-sectional view of a plurality of wind shielding structures according to an embodiment of the present invention;

[0030] Fig.11 yes Fig.10 The sharp angle and structural force relationship curve diagram of multiple windshield structures shown in;

[0031] Fig.12 yes Figure 1 The simulation calculation streamline diagram of the air duct component shown in ;

[0032] Fig.13 is a graph showing the relationship between air volume and power according to the model 1 and the model 2 according to the embodiment of the present invention;

[0033] Fig.14 is a schematic diagram of an air conditioner according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] Air Conditioner 100:

[0036] Air duct component 10; cross-flow air duct 101; air outlet air duct 102;

[0037] The volute portion 11; the volute tongue portion 12; the windward surface 121; the wind guide surface 122;

[0038] Tangent line T1 of the windward surface; Tangent line T2 of the wind-guiding surface; Auxiliary circle T3;

[0039] Intersection point P; tongue tip vertex A; rear end point B;

[0040] Crossflow impeller 20 ; heat exchanger 30 ; housing 40 ; air inlet 401 ; air outlet 402 ; air guide plate 50 . DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] Hereinafter, with reference to the accompanying drawings, an air duct component 10 for a crossflow impeller 20 according to an embodiment of the present invention will be described.

[0044] like Figure 1 As shown, the air duct component 10 defines a crossflow air duct 101 and an outlet air duct 102, the crossflow wind wheel 20 is suitable for being arranged in the crossflow air duct 101, and the outlet air duct 102 is connected and communicated with the crossflow air duct 101, and on a cross section perpendicular to the axial direction of the crossflow air duct 101 (for example Figure 1 As shown in the cross section, the air duct component 10 includes a volute portion 11 and a volute tongue portion 12 that are oppositely and spaced apart, and the cross-flow air duct 101 and the air outlet air duct 102 are located between the volute portion 11 and the volute tongue portion 12.

[0045] like Figure 1 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 1 The volute tongue portion 12 includes a windward surface 121 and a wind guide surface 122. A cross-flow duct 101 is provided between the windward surface 121 and the volute portion 11. An air outlet duct 102 is provided between the wind guide surface 122 and the volute portion 11. One end of the windward surface 121 adjacent to the volute portion 11 (as shown in FIG. Figure 1 The lower left end of the windward surface 121 shown in FIG. 1 ) and one end of the wind guide surface 122 adjacent to the volute portion 11 (as shown in FIG. Figure 1 The upper left end of the wind guide surface 122 shown in FIG. 1 intersects to form the tongue tip vertex A. More specifically, in combination with Figure 2 The tongue tip apex A is the tangent point of the radius extension line of the crossflow impeller 20 and the tongue tip portion of the volute tongue portion 12 , that is, the protruding portion of the volute tongue portion 12 adjacent to the volute casing portion 11 .

[0046] It can be understood that when the crossflow impeller 20 rotates in the crossflow duct 101, the airflow outside the crossflow duct 101 is continuously sucked into the crossflow duct 101, and the airflow in the crossflow duct 101 is discharged to the outlet duct 102. The tip of the tongue-shaped volute tongue portion 12 is provided at the junction of the crossflow duct 101 and the outlet duct 102 to prevent the gas from circulating in the crossflow duct 101, that is, when the airflow at the outlet of the crossflow duct 101 passes through the apex A of the tongue tip, the airflow at the outlet of the crossflow duct 101 is sucked into the crossflow duct 101, and the airflow in the crossflow duct 101 is discharged to the outlet duct 102. When close, it can be easily separated into two streams by the volute tongue portion 12, one of which is the majority of the airflow, which flows along the wind guide surface 122 from the air outlet duct 102 to the outlet of the air outlet duct 102, and the other is a small part of the airflow, which passes through the gap between the windward surface 121 and the crossflow wind wheel 20 and returns to the crossflow air duct 101. After the crossflow wind wheel 20 rotates one circle in the crossflow air duct 101, it returns to the vicinity of the volute tongue portion 12 to participate in a new diversion.

[0047] like Figure 1 and Figure 5 As shown, the air duct component 10 according to the embodiment of the present invention has a cross section perpendicular to the axial direction of the cross-flow air duct 101 (for example Figure 5 The intersection of the tangent line T1 of the windward surface 121 and the tangent line T2 of the wind guide surface 122 is the intersection point P. The tip of the volute tongue portion 12 extends toward the volute portion 11, so that the volute tongue portion 12 partially extends to the side of the volute portion 11 adjacent to the intersection point P, and the tip vertex A is located on the side of the volute portion 11 adjacent to the intersection point P.

[0048] Therefore, according to the air duct component 10 of the embodiment of the present invention, by setting the tongue tip apex A of the volute tongue portion 12 on the side of the volute portion 11 adjacent to the intersection P of the tangent T1 of the windward surface 121 and the tangent T2 of the wind guide surface 122, when the airflow in the cross-flow air duct 101 comes near the tongue tip apex A, it can be separated into two streams more smoothly, thereby reducing aerodynamic losses. When the rotation speed of the cross-flow wind wheel 20 is constant, the air supply volume can be increased. When the air supply volume is constant, the aerodynamic power can be reduced, thereby achieving the effect of improving the air supply efficiency.

[0049] In the embodiment of the present invention, the specific definition of "the tangent line T1 of the windward surface 121" and "the tangent line T2 of the wind guide surface 122" can be as follows. Figure 2 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 2 The cross section shown in the figure) is firstly drawn with the tip apex A and the rear end point B of the volute tongue portion 12, wherein the rear end point B of the volute tongue portion 12 is the tangent point of the radius extension line of the crossflow wind wheel 20 and the end of the windward surface 121 away from the volute case portion 11.

[0050] like Figure 2 and Figure 3 As shown, when the windward surface 121 of the volute tongue portion 12 is a plane, the extension line of the plane is the tangent line T1 of the windward surface 121. When the windward surface 121 of the volute tongue portion 12 is a non-plane, the tangent line T1 of the windward surface 121 can be defined as follows. On a cross section perpendicular to the axial direction of the crossflow air duct 101 (for example Figure 3 The cross section shown in the figure), the line connecting the center of the crossflow wind wheel 20 and the apex point A of the tongue tip is defined as the first line L1, the line connecting the center of the crossflow wind wheel 20 and the rear end point B is defined as the second line L2, and the angle between the first line L1 and the second line L2 is β. A first auxiliary line L3 and a second auxiliary line L4 are drawn between the first line L1 and the second line L2, the angle between the first auxiliary line L3 and the first line L1 is β / 3, and the angle between the second auxiliary line L4 and the second line L2 is β / 3. The intersection point of the first auxiliary line L3 and the windward surface 121 of the volute tongue portion 12 is the first intersection point C, and the intersection point of the second auxiliary line L4 and the windward surface 121 of the volute tongue portion 12 is the second intersection point D. On a cross section perpendicular to the axial direction of the crossflow air duct 101 (for example Figure 3 The straight line connecting the first intersection point C and the second intersection point D is the tangent line T1 of the windward surface 121.

[0051] like Figure 2 and Figure 4 As shown, when the air guiding surface 122 of the volute tongue portion 12 is a plane, the extension line of the plane is the tangent line T2 of the air guiding surface 122. When the air guiding surface 122 of the volute tongue portion 12 is a non-plane, the tangent line T2 of the air guiding surface 122 can be defined as follows. On a cross section perpendicular to the axial direction of the crossflow air duct 101 (e.g. Figure 4 The cross section shown in the figure is shown in the figure. The line connecting the tongue tip apex A and the rear end B of the volute tongue portion 12 is the third line L5. The length of the third line L5 is d. The first dividing point E and the second dividing point F are made on the air guide surface 122 of the volute tongue portion 12. The distance between the first dividing point E and the tongue tip apex A is d / 2, and the distance between the second dividing point F and the tongue tip apex A is d. On the cross section perpendicular to the axial direction of the crossflow air duct 101 (for example Figure 4 The straight line connecting the first dividing point E and the second dividing point F is the tangent line T2 of the wind guide surface 122.

[0052] In other words, Figure 4 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 4The cross section shown in the figure) is shown in the figure. The line connecting the tongue tip apex A and the rear end point B of the tongue portion 12 is taken as the third line L5. The first auxiliary arc is taken as the center of the circle of the tongue tip apex A and the line connecting the tongue tip apex A and the midpoint G of the third line L5 as the radius. The intersection of the first auxiliary arc and the wind guide surface 122 is the first dividing point E. The second auxiliary arc is taken as the center of the circle of the tongue tip apex A and the line connecting the tongue tip apex A and the rear end point B as the radius. The intersection of the second auxiliary arc and the wind guide surface 122 is the second dividing point F. The straight line connecting the first dividing point E and the second dividing point F is the tangent T2 of the wind guide surface 122.

[0053] As discussed above, combined with Figure 5 , on a cross section perpendicular to the axial direction of the crossflow duct 101 (e.g. Figure 5 The straight line connecting the first intersection point C and the second intersection point D is the tangent line T1 of the windward surface 121; the straight line connecting the first bisection point E and the second bisection point F is the tangent line T2 of the wind-guiding surface 122. The intersection point of the tangent line T1 of the windward surface 121 and the tangent line T2 of the wind-guiding surface 122 is the intersection point P.

[0054] And, if Figure 6 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 6 The cross section shown in the figure), the line connecting the tongue tip apex A and the second intersection point D is the first angle line L8, the line connecting the tongue tip apex A and the second subpoint F is the second angle line L9, and the angle between the first angle line L8 and the second angle line L9 is the tongue tip angle a of the volute tongue portion 12.

[0055] In some embodiments of the present invention, Figure 5 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 The cross section shown in FIG. 1 shows a cross section of the embodiment of the present invention, wherein the distance between the apex A of the tongue tip and the intersection point P is S1, and the minimum distance between the windward surface 121 and the crossflow impeller 20 is S2, wherein S1 is less than S2, and S1<S2. Therefore, it is possible to avoid the problem that the portion of the volute tongue portion 12 located on the side of the volute case portion 11 adjacent to the intersection point P is too large, resulting in too small an inlet cross-sectional area of ​​the air outlet duct 102, that is, too small an cross-sectional area of ​​the airflow flowing out of the crossflow duct 101, resulting in a decrease in air volume. In other words, according to the air duct component 10 of the embodiment of the present invention, although the apex A of the tongue tip of the volute tongue portion 12 is located on the side of the volute case portion 11 adjacent to the intersection point P, the portion of the volute tongue portion 12 located on the side of the volute case portion 11 adjacent to the intersection point P is not too large, thereby improving the smoothness of the flow diversion of the volute tongue portion 12 on the one hand, and ensuring the air volume on the other hand, thereby increasing the air volume when the rotation speed of the crossflow impeller 20 is constant, and reducing the aerodynamic power when the air volume is constant, thereby achieving the effect of improving the air supply efficiency.

[0056] In some embodiments of the present invention, Figure 5 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 The cross section shown in FIG. 1 shows a cross section of the embodiment of the present invention, wherein the distance between the apex A of the tongue tip and the intersection point P is S1, and the minimum distance between the windward surface 121 and the crossflow impeller 20 is S2, wherein S1 is smaller than S2, and S1 is also larger than 1 / 3 times of S2, and S2 / 3<S1<S2. Therefore, according to the air duct component 10 of the embodiment of the present invention, by setting S2 / 3<S1<S2, although the apex A of the tongue tip of the volute tongue portion 12 is located on the side of the volute case portion 11 adjacent to the intersection point P, the portion of the volute tongue portion 12 located on the side of the volute case portion 11 adjacent to the intersection point P will not be too large, thereby effectively balancing the aerodynamic resistance and the air outlet area of ​​the volute tongue portion 12, thereby improving the smoothness of the flow diversion of the volute tongue portion 12 on the one hand, and ensuring the air outlet volume on the other hand, thereby increasing the air supply volume when the rotation speed of the crossflow impeller 20 is constant, and reducing the aerodynamic power when the air supply volume is constant, thereby achieving the effect of improving the air supply efficiency.

[0057] In some embodiments of the present invention, Figure 5 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 As shown in the cross section, the minimum distance between the windward surface 121 and the crossflow wind wheel 20 is S2, the minimum distance between the tongue tip apex A and the crossflow wind wheel 20 is S3, S3 is greater than 1.5 times of S2, that is, S3>1.5S2, therefore, it can be ensured that the return air gap between the windward surface 121 and the crossflow wind wheel 20 is sufficient, thereby further reducing the pressure of the volute tongue portion 12 at the tongue tip apex A, and then further improving the diversion smoothness of the volute tongue portion 12, thereby achieving the effect of improving the air supply efficiency.

[0058] In some embodiments of the present invention, Figure 5 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 The cross section shown in the figure), the distance between the apex A of the tongue tip and the intersection point P is S1, 2mm≤S1≤3mm. For example, the distance between the apex A of the tongue tip and the intersection point P can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm. Therefore, it can be ensured that the part of the volute tongue portion 12 protruding on the side of the volute case portion 11 adjacent to the intersection point P is not too much or too little, so that the aerodynamic resistance and the air outlet area of ​​the volute tongue portion 12 can be more effectively balanced, and then on the one hand, the smoothness of the flow diversion of the volute tongue portion 12 can be improved, and on the other hand, the air outlet can be guaranteed, so that the air supply volume can be increased when the rotation speed of the crossflow impeller 20 is constant, and the aerodynamic power can be reduced when the air supply volume is constant, thereby achieving the effect of improving the air supply efficiency.

[0059] In some embodiments of the present invention, Figure 5 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 The cross section shown in FIG. 1 ), the distance between the apex A of the tongue tip and the intersection point P is S1, the length of the line connecting the apex A of the tongue tip and the center of the crossflow air duct 101 is X1, the length of the line connecting the intersection point P and the center of the crossflow air duct 101 is X2, and the absolute value of the difference between X2 and X1 is less than S1, that is, |X2-X1|<S1. Therefore, it is shown that the minimum distance from the apex A of the tongue tip to the crossflow wind wheel 20 is close to the minimum distance from the intersection point P to the crossflow wind wheel 20, so that the return air gap between the windward surface 121 and the crossflow wind wheel 20 is neither too large nor too small, which can ensure the smoothness of the diversion of the volute tongue portion 12 on the one hand, and the air volume requirement on the other hand, thereby achieving the effect of improving the air supply efficiency.

[0060] In some embodiments of the present invention, Figure 5 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 The cross section shown in FIG. 1 is a cross section of the cross-flow air duct 101, the distance between the apex A of the tongue tip and the intersection point P is S1, the length of the line connecting the apex A of the tongue tip and the center of the cross-flow air duct 101 is X1, the length of the line connecting the intersection point P and the center of the cross-flow air duct 101 is X2, the absolute value of the difference between X2 and X1 is less than S1, that is, |X2-X1|<S1, and at the same time, X1 is also less than X2, that is, X1<X2, that is, the distance between the apex A of the tongue tip and the center of the cross-flow air duct 101 is closer than the distance between the intersection point P and the center of the cross-flow air duct 101. Therefore, it can better ensure that the return air gap between the windward surface 121 and the cross-flow wind wheel 20 is not too large or too small, so as to better ensure the smoothness of the diversion of the volute tongue portion 12, and better ensure the air volume requirements, thereby achieving the effect of improving the air supply efficiency.

[0061] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 and Figure 6The cross section shown in FIG. 1 shows a cross section of the spiral tongue portion 12, the angle of the tip of the spiral tongue portion 12 is a, the angle of the tangent T1 of the windward surface 121 and the angle of the tangent T2 of the wind-guiding surface 122 is a1, and a is smaller than a1, that is, a<a1. Therefore, the angle of the tip of the spiral tongue portion 12 can be kept small, so that when the airflow in the cross-flow duct 101 passes through the vicinity of the tip of the spiral tongue apex A when the airflow is discharged to the outlet duct 102, it can be easily separated into two streams by the spiral tongue portion 12 with a small tip of the spiral tongue portion 12, one of which can smoothly flow from the outlet duct 102 to the outlet of the outlet duct 102 along the wind-guiding surface 122, and the other can smoothly pass through the gap between the windward surface 121 and the cross-flow impeller 20 and return to the cross-flow duct 101, thereby further reducing the pressure near the tip of the spiral tongue apex A, thereby achieving the effect of improving the air supply efficiency.

[0062] In some embodiments of the present invention, Figure 6 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 6 The cross section shown in FIG. 1 shows a cross section of the spiral tongue portion 12, wherein the tongue tip angle of the spiral tongue portion 12 is a, and a is less than 55°. For example, the tongue tip angle of the spiral tongue portion 12 can be 50°, 51°, 52°, 53°, 54°, etc. Therefore, the tongue tip angle can be kept small, so that when the airflow in the crossflow duct 101 passes through the vicinity of the tongue tip apex A when the airflow is discharged to the outlet duct 102, it can be easily separated into two streams by the spiral tongue portion 12 with a small tongue tip angle, one of which can smoothly flow from the outlet duct 102 to the outlet of the outlet duct 102 along the wind guide surface 122, and the other can smoothly pass through the gap between the windward surface 121 and the crossflow impeller 20 and return to the crossflow duct 101, thereby further reducing the pressure near the tongue tip apex A, thereby achieving the effect of improving the air supply efficiency.

[0063] In some embodiments of the present invention, Figure 6 As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 6 The cross section shown in FIG. 1 shows a cross section of the spiral tongue portion 12, and the tongue tip angle of the spiral tongue portion 12 is a, 50°<a<55°. For example, the tongue tip angle of the spiral tongue portion 12 can be 51°, 52°, 52.3°, 53°, 54°, etc. Therefore, it can be ensured that the tongue tip angle is small, but not too small, so that when the airflow in the crossflow duct 101 passes through the vicinity of the tongue tip apex A when the airflow is discharged to the outlet duct 102, it can be easily separated into two streams by the spiral tongue portion 12 with a small tongue tip angle, one of which can smoothly flow from the outlet duct 102 to the outlet of the outlet duct 102 along the wind guide surface 122, and the other can smoothly return to the crossflow duct 101 through the gap between the windward surface 121 and the crossflow impeller 20, thereby further reducing the pressure near the tongue tip apex A, thereby achieving the effect of improving the air supply efficiency.

[0064] In some embodiments of the present invention, Figure 5As shown, in a cross section perpendicular to the axial direction of the crossflow duct 101 (eg Figure 5 The cross section shown in the figure is shown in the figure. An auxiliary circle T3 is made with the intersection point P as the center and the minimum distance between the intersection point P and the crossflow impeller 20 as the radius. In the area of ​​the auxiliary circle T3, the distance between the windward surface 121 and the wind guide surface 122 gradually decreases toward the direction of the adjacent tongue tip apex A. Therefore, it can be ensured that the tongue tip of the volute tongue portion 12 is more in line with the streamlined design. When the airflow in the crossflow duct 101 passes through the vicinity of the tongue tip apex A when the airflow is discharged to the outlet duct 102, it can be easily separated into two streams by the volute tongue portion 12 with a smaller tongue tip angle. One stream can smoothly flow from the outlet duct 102 to the outlet of the outlet duct 102 along the wind guide surface 122, and the other stream can smoothly pass through the gap between the windward surface 121 and the crossflow impeller 20 and return to the crossflow duct 101, thereby further reducing the pressure near the tongue tip apex A, thereby achieving the effect of improving the air supply efficiency.

[0065] The wind duct components for the crossflow impeller in the related art, such as Figure 7 As shown, in the cross section perpendicular to the axial direction of the crossflow duct (for example Figure 7 The tip H of the volute tongue portion (as shown in the cross-section) generally adopts a blunt body structure with a substantially circular arc profile, that is, a circular arc angle is used to connect the windward surface and the wind-guiding surface of the volute tongue portion. In other words, this air duct component in the related art is equivalent to forming a sharp angle cut between the tangent of the windward surface and the tangent of the wind-guiding surface of the volute tongue portion and performing an arc smoothing treatment. At this time, the entire volute tongue portion is located on the side away from the volute case portion of the intersection Q of the tangent of the windward surface and the tangent of the wind-guiding surface. When the crossflow impeller rotates, the airflow passes through the crossflow air duct and flows out to the outlet air duct. The airflow is separated into two streams at the tip H of the tongue, one stream flows to the outlet air duct, and the other stream flows back to the crossflow air duct with the crossflow impeller.

[0066] like Figure 8 As shown, in the above-mentioned air duct component in the related art, most of the airflow at the tip portion H directly impacts the tip portion H, and the airflow is not easy to be split along the wind guide surface and the windward surface, which means that the tip portion H of the blunt body structure is not conducive to airflow separation, and the volute tongue is subjected to the force in the direction of the airflow, and the volute tongue will have a reaction force on the airflow, which is the resistance of the volute tongue to the airflow. Since most of the airflow at the tip portion H directly impacts the tip portion H, it means that the tip portion H of the blunt body structure has a large resistance to the airflow, such as Fig. 9 As shown, the pressure at the tongue tip H is significantly higher than the pressure in the surrounding area, which indicates that the air duct components in the related art have large aerodynamic losses and low air supply efficiency.

[0067] The applicant has found that for multiple windshield structures with the same windshield area but different sharp angles, the smaller the sharp angle, the smaller the resistance of the windshield structure to the airflow, and the smaller the aerodynamic loss caused by the structure. The "sharp angle of the windshield structure" refers to the angle between the line connecting the upper end point of the upper slope and the apex of the sharp angle and the line connecting the lower end point of the lower slope and the apex of the sharp angle in the cross section. For example Fig.10 As shown, the sharp angles of the multiple windshield structures are 30°, 40°, 50°, 60°, 70°, 80° and 90° respectively. Fig.11 As shown, the relationship curves between the force of airflow (vertical axis) and the tip angle (horizontal axis) on multiple windshield structures are obtained through experiments. As the tip angle decreases, the force on the structure decreases. In other words, the smaller the tip angle, the smaller the resistance of the windshield structure to the airflow, and the smaller the aerodynamic loss caused by the windshield structure.

[0068] Based on the above findings, the applicant applied them to the design of the volute tongue portion 12, and verified through experiments that the smaller the tongue tip angle of the volute tongue portion 12, the smaller the aerodynamic resistance of the volute tongue portion 12. Therefore, the tongue tip angle of the volute tongue portion 12 can be reduced to reduce the resistance of the volute tongue portion 12 to the airflow. However, if the tongue tip angle of the volute tongue portion 12 is too small, the apex A of the tongue tip is closer to the volute case portion 11, and the part of the volute tongue portion 12 protrudes too much from the intersection point P, the area where the airflow flows out of the cross-flow duct 101 will be too small, and the air volume will be significantly reduced. Therefore, a balance should be made between the aerodynamic resistance of the volute tongue portion 12 and the air outlet area, so as to obtain the optimal position of the apex A of the tongue tip.

[0069] The applicant has found that when the tongue tip vertex A is located on the side of the volute portion 11 adjacent to the intersection point P of the tangent line T1 of the windward surface 121 and the tangent line T2 of the wind guide surface 122, and is about 2.5 mm away from the intersection point P, and the tongue tip angle is less than 55 degrees, the effect is more ideal, for example Fig.12 As shown, the airflow can be smoothly split into two streams at the tip A of the volute tongue portion 12, thereby reducing aerodynamic losses and improving the air supply efficiency of the crossflow fan. At the same speed, the air volume is larger, while the aerodynamic power is lower at the same air volume, thereby effectively improving the air supply efficiency.

[0070] right Figure 1 and Figure 7 The two air duct components 10 were experimentally verified, and the results showed that under the same air volume, Figure 1 The air duct component 10 shown in Figure 7 The pneumatic power of the air duct component 10 shown in FIG. 1 is about 7% lower. In a specific experiment, Figure 7 Take the basic structure as a model, test it first, and then Figure 7 The corresponding position of the snail tongue is attached to the snail tongue piece to obtain Figure 1The structure is used as model 2 and then tested to test the air volume and power, so as to compare the differences between the before and after models. Fig.13 It is the wind volume power comparison curve of model 1 and model 2. It can be seen from the curve that model 2, namely Figure 1 The power of the corresponding air duct component 10 is significantly reduced, for example, at 1200m 3 / h air volume, the power is reduced by 2.1w, and the aerodynamic power is reduced by about 5.9%. Therefore, it can be seen that model 2, that is, Figure 1 The corresponding air duct component 10 can significantly improve the air supply efficiency.

[0071] Hereinafter, an air conditioner 100 according to an embodiment of a second aspect of the present invention will be described with reference to the accompanying drawings.

[0072] like Fig.14 As shown, the air conditioner 100 includes: a crossflow fan wheel 20 and an air duct component 10. The air duct component 10 is an air duct component 10 for the crossflow fan wheel 20 according to the first embodiment of the present invention. The crossflow fan wheel 20 is arranged in the crossflow air duct 101.

[0073] Therefore, according to the air conditioner 100 of the embodiment of the present application, by setting the tongue tip apex A of the volute tongue portion 12 on the side of the volute portion 11 adjacent to the intersection of the tangent T1 of the windward surface 121 and the tangent T2 of the wind guide surface 122, when the airflow in the cross-flow air duct 101 comes near the tongue tip apex A, it can be more smoothly separated into two streams, thereby reducing aerodynamic losses. When the rotation speed of the cross-flow wind wheel 20 is constant, the air supply volume can be increased. When the air supply volume is constant, the aerodynamic power can be reduced, thereby achieving the effect of improving the air supply efficiency.

[0074] It should be noted that the specific type of the air conditioner 100 according to the embodiment of the present invention is not limited. It can be an indoor unit of the air conditioner 100 in a split unit (including a cabinet unit and a wall mounted unit, etc.), or a mobile air conditioner or a window air conditioner in an integrated unit, etc. When the specific type of the air conditioner 100 is determined, the other structures and operations of the air conditioner 100 according to the embodiment of the present application are known to ordinary technicians in the field and will not be described in detail here.

[0075] For example, the air conditioner 100 may also generally include a heat exchanger 30, which may be disposed upstream and / or downstream of the air duct component 10, so that the air conditioner 100 may adjust the air temperature. In addition, some air conditioners 100 may also have other air processing functions, for example, some air conditioners 100 may also include a disinfection device, a purification device, etc., which may be disposed upstream and / or downstream of the air duct component 10, so that the air disinfector may sterilize and disinfect the air.

[0076] Below, refer to Fig.14, describing an air conditioner 100 according to a specific embodiment of the present invention.

[0077] like Figure 1 and Fig.14 As shown, the air conditioner 100 is a wall mounted unit and includes a shell 40, a heat exchanger 30, an air duct component 10, a crossflow impeller 20 and an air guide plate 50, etc. The shell 40 has an air inlet 401 at the top, and an air outlet 402 at the bottom. The air guide plate 50 is provided at the air outlet 402. The heat exchanger 30 is provided above and in front of the crossflow impeller 20, and the crossflow impeller 20 is provided at the crossflow duct 101. The outlet of the air outlet duct 102 extends to the air outlet 402. The volute portion 11 is located at the rear side of the volute tongue portion 12. During the rotation of the crossflow impeller 20, the air outside the air conditioner 100 enters the shell 40 from the air inlet 401, and after heat exchange in the heat exchanger 30, enters the crossflow duct 101 from the top of the crossflow duct 101, and then flows to the air outlet duct 102, and then is discharged from the air outlet 402 to the outside of the air conditioner 100.

[0078] According to the air conditioner 100 of this embodiment, on the cross section perpendicular to the axial direction of the crossflow impeller 20, the intersection of the tangent T1 of the windward surface 121 and the tangent T2 of the wind guide surface 122 is the intersection point P, and the tongue tip of the volute tongue portion 12 extends backward, so that the tongue portion 12 partially extends to the rear side of the intersection point P, and the tongue tip apex A is located at the rear side of the intersection point P. Therefore, according to the air conditioner 100 of this embodiment, when the airflow in the crossflow air duct 101 comes near the tongue tip apex A, it can be separated into two streams more smoothly, thereby reducing aerodynamic losses, and when the rotation speed of the crossflow impeller 20 is constant, the air supply volume can be increased, and when the air supply volume is constant, the aerodynamic power can be reduced, thereby achieving the effect of improving the air supply efficiency.

[0079] In the description of the present application, it should be understood that the terms "lower", "front", "left", "right", "axial", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 application.

[0080] 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0081] In the present application, 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”, and “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”, and “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.

[0082] 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 application. 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.

[0083] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application 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 defines a crossflow air duct and an air outlet air duct, the crossflow air duct is suitable for setting a crossflow air wheel, the air outlet air duct is connected to the crossflow air duct, and on a cross section perpendicular to the axis of the crossflow air duct, the air duct component includes a volute portion and a volute tongue portion which are relatively arranged, the volute tongue portion includes a windward surface and a wind guiding surface, the windward surface is suitable for defining the crossflow air duct with the volute portion, the wind guiding surface is suitable for defining the air outlet air duct with the volute portion, an end of the windward surface close to the volute portion intersects with an end of the wind guiding surface close to the volute portion to form a tongue tip vertex, the intersection point of the tangent of the windward surface and the tangent of the wind guiding surface is the intersection point, and the tongue tip vertex is located on the side of the intersection point close to the volute portion; When the windward surface is a plane, the extension line of the windward surface is the tangent of the windward surface; when the windward surface is a non-plane, on the cross section, the line connecting the center of the crossflow wind wheel and the top of the tongue tip is the first line, the line connecting the center of the crossflow wind wheel and the rear end point of the tongue portion is the second line, the angle between the first line and the second line is the first angle, there is a first auxiliary line and a second auxiliary line that divide the first angle into three equal parts between the first line and the second line, and the intersection point of the first auxiliary line and the windward surface of the tongue portion is the first intersection point, the intersection point of the second auxiliary line and the windward surface of the tongue portion is the second intersection point, and the straight line connecting the first intersection point and the second intersection point is the tangent of the windward surface; When the wind guide surface is a plane, the extension line of the wind guide surface is the tangent line of the wind guide surface; when the wind guide surface is a non-plane, on the cross section, the line connecting the apex of the tongue tip and the rear end point of the volute tongue portion is the third line, the length of the third line is d, the wind guide surface of the volute tongue portion has a first dividing point and a second dividing point, the distance between the first dividing point and the apex of the tongue tip is d / 2, the distance between the second dividing point and the apex of the tongue tip is d, and the straight line connecting the first dividing point and the second dividing point is the tangent line of the wind guide surface; Wherein, at least one of the windward surface and the wind-guiding surface is a non-planar surface, and the rear end point of the volute tongue portion is a point of intersection between an extended radius of the crossflow wind wheel and an end of the windward surface away from the volute portion.

2. The air duct component for a crossflow impeller according to claim 1, characterized in that: The distance between the apex of the tongue tip and the intersection point is S1, the minimum gap between the windward surface and the crossflow impeller is S2, and S1 is smaller than S2.

3. The air duct component for a crossflow impeller according to claim 2, characterized in that: The S1 is greater than 1 / 3 times the S2.

4. The air duct component for a crossflow impeller according to claim 2, characterized in that: The minimum distance between the apex of the tongue tip and the crossflow impeller is S3, and S3 is greater than 1.5 times of S2.

5. The air duct component for a crossflow impeller according to claim 1, characterized in that: The distance between the apex of the tongue tip and the intersection point is S1, 2mm≤S1≤3mm.

6. The air duct component for a crossflow impeller according to claim 1, characterized in that: The distance between the apex of the tongue tip and the intersection point is S1, the length of the line connecting the apex of the tongue tip and the center of the crossflow air duct is X1, the length of the line connecting the intersection point and the center of the crossflow air duct is X2, and the absolute value of the difference between X2 and X1 is less than S1.

7. The air duct component for a crossflow impeller according to claim 6, characterized in that: The X1 is smaller than the X2.

8. The air duct component for a crossflow impeller according to claim 1, characterized in that: The tongue tip angle of the volute tongue portion is a, the angle between the tangent line of the windward surface and the tangent line of the wind guide surface is a1, and a is smaller than a1; Among them, the line connecting the tongue tip apex and the second intersection point is the first angle line, the line connecting the tongue tip apex and the second branch point is the second angle line, and the angle between the first angle line and the second angle line is the tongue tip angle of the snail tongue portion.

9. The air duct component for a crossflow impeller according to claim 1, characterized in that: The tongue tip angle of the tongue portion of the snail is a, a<55°; Among them, the line connecting the tongue tip apex and the second intersection point is the first angle line, the line connecting the tongue tip apex and the second branch point is the second angle line, and the angle between the first angle line and the second angle line is the tongue tip angle of the snail tongue portion.

10. The air duct component for a crossflow impeller according to claim 9, characterized in that: 50°＜a＜55°。 11. The air duct component for a crossflow wind wheel according to any one of claims 1 to 10, characterized in that: An auxiliary circle is drawn with the intersection point as the center and the minimum distance between the intersection point and the crossflow impeller as the radius. In the auxiliary circle area, the distance between the windward surface and the wind guide surface gradually decreases in the direction approaching the apex of the tongue tip.

12. An air conditioner, characterized in that: include: A crossflow wind wheel and an air duct component, wherein the air duct component is an air duct component for a crossflow wind wheel according to any one of claims 1 to 11, and the crossflow wind wheel is arranged in the crossflow air duct.

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