Axial flow fan, air conditioner cabinet air duct system and column type air conditioner

Abstract

The application discloses an axial flow fan, which comprises a rotating shaft and a plurality of blades arranged circumferentially outside the rotating shaft, the distance between each blade and the rotating shaft gradually decreases from the side of the one end connected with the rotating shaft to the side of the other end along the axial direction of the rotating shaft; and the rotating surface of the air outlet side of the axial flow fan is a cambered surface when rotating; compared with the prior art, the axial flow fan is installed in a column type air conditioner shell and protrudes to the air outlet side to reduce the distance between the axial flow fan and the air outlet on the front side of the column type air conditioner shell, and the distance between the two sides of the axial flow fan and the inner wall of the column type air conditioner shell is also reduced, so that the air outlet efficiency of the air outlet after the axial flow fan is installed in the column type air conditioner shell can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioner structure, in particular to an axial flow fan, an air conditioner cabinet air duct system and a column type air conditioner. BACKGROUND

[0002] At present, when the cylindrical cabinet type air conditioner indoor unit adopts an axial flow fan as an air driving source, the rotation space of the axial flow fan during operation is cylindrical. When viewed in the projection section perpendicular to the ground, the distance between the rotating shaft part of the axial flow fan and the edge of the axial flow fan to the cylindrical air conditioner shell changes from large to small; thus, the space between the cylindrical air conditioner shell and the axial flow fan is wasted; meanwhile, the evaporator of the cylindrical cabinet type air conditioner indoor unit is usually U-shaped, and when the U-shaped evaporator is matched with the axial flow fan to form an air duct structure, due to the size limitation of the evaporator, the axial flow fan is usually nested in the internal space of the U-shaped evaporator, which limits the diameter size of the axial flow fan. Especially for some special air duct structures, when the axial flow fan is limited in size along the rotating shaft direction, this unfavorable space size limitation factor will affect the performance of the axial flow fan.

[0003] For example, the conventional air conditioner indoor unit air duct system cross-section framework diagram in the prior art Figure 1 in the cylindrical air conditioner shell and due to the structural design of the axial flow fan 2, the axial flow fan 2 can only be fitted and installed at the U-shaped opening of the evaporator 1, so that the distance between the axial flow fan 2 and the air outlet on the front side of the cylindrical air conditioner shell and the distance between the two sides of the axial flow fan 2 and the inner wall of the cylindrical air conditioner shell are both large; thus, the air outlet effect is relatively poor. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide an axial flow fan to solve the problem that, for a column type air conditioner, due to the structural design of the axial flow fan, the distance between the axial flow fan and the air outlet on the front side of the cylindrical air conditioner shell and the distance between the two sides of the axial flow fan and the inner wall of the cylindrical air conditioner shell are both large, thus the air outlet effect is relatively poor.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: an axial flow fan, comprising a rotating shaft and a plurality of blades arranged circumferentially outside the rotating shaft, the distance between each blade and the rotating shaft at one end gradually decreases to the other end along the axial direction of the rotating shaft; and when rotating, the rotation surface of the air outlet side of the axial flow fan is an arc surface.

[0006] The air conditioner cabinet air duct system also adopts the technical scheme that a column type air conditioner comprises the air conditioner cabinet air duct system.

[0007] The column type air conditioner also adopts the technical scheme that the air conditioner cabinet air duct system.

[0008] Compared with the prior art, the air conditioner cabinet air duct system has the following beneficial effects:

[0009] 1. The distance between the two sides of the end of each blade of the axial flow fan connected with the rotating shaft and gradually reducing to the other end of the rotating shaft in the axial direction, and the rotating surface of the air outlet side of the axial flow fan is an arc surface when rotating, that is, the projection of the air outlet side of the axial flow fan on the horizontal plane is arc-shaped; the axial flow fan is installed in the column type air conditioner shell to the front side of the air outlet to reduce the distance between the axial flow fan and the air outlet on the front side of the column type air conditioner shell, and the distance between the two sides of the axial flow fan and the inner wall of the column type air conditioner shell is also reduced, so that the size of the axial flow fan in space can be increased, and the air outlet efficiency of the air outlet on the rear side of the column type air conditioner shell can be improved;

[0010] 2. The air conditioner cabinet air duct system utilizes the axial flow fan in the application, and the size of the axial flow fan in the same column type air conditioner shell can be larger than that of the prior art in the axial direction, and the space between the axial flow fan and the air outlet on the front side of the column type air conditioner shell and the space between the two sides of the axial flow fan and the inner wall of the column type air conditioner shell are effectively utilized to improve the performance of the axial flow fan;

[0011] 3. The column type air conditioner makes the arrangement of the axial flow fan in the column type air conditioner shell more reasonable, and the size of the axial flow fan can be increased in the same space, which makes the layout in the column type air conditioner shell more compact on the one hand, and improves the air outlet efficiency on the other hand. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional frame diagram of a conventional air conditioner indoor unit air duct system;

[0013] Figure 2 It is a structural schematic diagram of the axial flow fan in an embodiment of the application;

[0014] Figure 3 It is a structural schematic diagram of the air outlet grille in an embodiment of the application;

[0015] Figure 4 It is a sectional frame of the air conditioner cabinet air duct system in an embodiment of the application Figure 1 ;

[0016] Figure 5 A cross-section structure of an air duct system of a cabinet air conditioner Figure 2 ;

[0017] Figure 6 A structure diagram of a cylindrical air conditioner in an embodiment of the present application.

[0018] The reference signs in the attached drawings of the specification include: an evaporator 1, an axial flow fan 2, a rotating shaft 21, a blade 22, an air outlet grille 3, a support outer ring 31, a grille strip 32, a support ring 33, a cross flow fan 4, a cross flow air outlet 5, and an air inlet 6. DETAILED DESCRIPTION

[0019] The present application will be further described in detail through specific embodiments:

[0020] Embodiment 1

[0021] As shown in Figure 2 , Figure 4 and Figure 5 , an embodiment of the present application proposes an axial flow fan, which includes a rotating shaft 21 and a plurality of blades 22 arranged circumferentially outside the rotating shaft 21, and the distance from each blade 22 to the other end along the axial direction of the rotating shaft 21 gradually decreases from the distance on both sides of the end connected to the rotating shaft 21 to the other end; and when rotating, the rotation surface of the air outlet side of the axial flow fan 2 is an arc surface.

[0022] In this embodiment:

[0023] The rotating shaft 21 is in a columnar structure, and the plurality of blades 22 are arranged in the same direction on the rotating shaft 21, and each blade 22 is arranged in an arc shape; and the number of blades 22 is three.

[0024] Since the distance from each blade 22 to the other end along the axial direction of the rotating shaft 21 gradually decreases from the distance on both sides of the end connected to the rotating shaft 21 to the other end, and when rotating, the rotation surface of the air outlet side of the axial flow fan 2 is an arc surface, i.e., the projection of the air outlet side of the axial flow fan 2 on the horizontal plane is in an arc shape; the axial flow fan 2 in the present application can be better installed in the cylindrical air conditioner shell at the air outlet, and the axial flow fan 2 and the air outlet side of the cylindrical air conditioner shell are more matched in assembly, the distance between the axial flow fan 2 and the air outlet on the front side of the cylindrical air conditioner shell and the distance between the two sides of the axial flow fan 2 and the inner wall of the cylindrical air conditioner shell are smaller, thereby improving the size of the axial flow fan 2 in space, and further improving the air outlet efficiency of the air outlet after being installed in the cylindrical air conditioner shell.

[0025] Embodiment 2

[0026] AsFigure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 An embodiment of the present application provides an air conditioner cabinet air duct system, which comprises a column-shaped air conditioner shell, a U-shaped evaporator 1 and an axial flow fan 2 in the embodiment 1. The axial flow fan 2 is arranged in the column-shaped air conditioner shell and located in front of the opening side of the U-shaped evaporator 1. The edge of each blade and the side facing the air outlet side of the axial flow fan 2 are fitted in the inner side of the column-shaped air conditioner shell.

[0027] Herein:

[0028] By using the structural design of the axial flow fan 2, the distance between the axial flow fan 2 and the air outlet on the front side of the column-shaped air conditioner shell and the distance between the two sides of the axial flow fan 2 and the inner wall of the column-shaped air conditioner shell are reduced, so as to improve the performance of the axial flow fan 2. Meanwhile, due to the structural design of the axial flow fan 2, the installation position of the axial flow fan 2 in the column-shaped air conditioner shell is moved forward, and the size of the axial flow fan 2 can be increased in the same column-shaped air conditioner shell, so that the axial flow fan 2 is more compact in the column-shaped air conditioner shell. The size of the axial flow fan 2 can be increased in the axial and / or radial directions, as long as the installation requirements are met, so as to improve the performance of the axial flow fan 2.

[0029] Based on the above scheme:

[0030] As Figure 3 , the air conditioner cabinet air duct system further comprises an air outlet grille 3 arranged at the air outlet of the column-shaped air conditioner shell and located on the air outlet side of the axial flow fan 2. The air outlet grille 3 is arc-shaped and protrudes away from the axial flow fan 2.

[0031] Herein: the air outlet grille 3 is used to guide the air generated by the axial flow fan 2, and the shape of the air outlet grille 3 is designed to match the shape of the column-shaped air conditioner shell. On the one hand, the overall structure of the column-shaped air conditioner shell after forming is beautiful, and on the other hand, the air outlet area of the air outlet is increased to improve the air outlet capacity.

[0032] The projection of the air outlet grille 3 on the vertical plane is an ellipse, so that the air outlet grille 3 can reasonably match the air outlet side of the axial flow fan 2 to guide the air, and the air outlet capacity can be increased.

[0033] In this embodiment:

[0034] Specifically, the air outlet grille 3 comprises a support outer ring 31 and a grille strip 32.

[0035] The grille strip 32 has a plurality of grille strips 32 arranged in a ring shape. One end of each grille strip 32 is connected to the inner side of the support outer ring 31, and the other end extends to the center part of the support outer ring 31.

[0036] The arrangement of the support outer ring 31 and the plurality of grid bars 32 forms a plurality of spaced-apart air outlets in the air outlet of the cylindrical air conditioner shell, thereby effectively guiding the air.

[0037] The width of each grid bar 32 gradually decreases from one end connected to the support outer ring 31 to the other end in the width direction of the axial flow fan 2. The structure of the grid bar 32 is designed according to the wind strength during the operation of the axial flow fan 2, which can increase the ventilation capacity in the middle of the air outlet grid 3 and reduce the number of grid bars 32 to increase the effective ventilation area of the air outlet and enhance the air guiding capacity.

[0038] At the same time, the width variation of the grid bars 32 located in the upper and lower regions of the support outer ring 31 is greater than that of the grid bars 32 located in the left and right regions.

[0039] If the width of one end of the grid bar 32 in the upper and lower regions of the support outer ring 31 in the width direction of the axial flow fan 2 is 3 cm and the width of the other end is 1 cm, then the width of one end of the grid bar 32 in the left and right regions of the support outer ring 31 in the width direction of the axial flow fan 2 can be 3 cm and the width of the other end can be 2 cm. This design can enhance the air guiding function and meet the actual demand for wind power.

[0040] Further, the plurality of grid bars 32 are arranged in an arc shape on the same side, which can also enhance the air guiding function.

[0041] In order to improve the structural strength of the air outlet grid 3 and increase the effective air guiding area of the air outlet grid 3 as much as possible, the lengths of the plurality of grid bars 32 are not completely the same, and a plurality of support rings 33 are formed in the support outer ring 31 and arranged from inside to outside, and each support ring 33 is fixedly connected to at least part of the grid bars 32.

[0042] In this embodiment:

[0043] The number of support rings 33 is 3, and the three support rings 33 are named as a first support ring 33, a second support ring 33 and a third support ring 33 from inside to outside; the five grid bars 32 distributed uniformly are connected with the first support ring 33, the second support ring 33 and the third support ring 33 and intersect at the center point of the first support ring 33 at one end; the five reinforcing ribs are connected between the first support ring 33 and the second support ring 33 and are arranged alternately with the five grid bars 32; the four grid bars 32 are arranged between every two adjacent grid bars 32 in the five grid bars 32 and extend to be connected with the second support ring 33 and the third support ring 33; and one grid bar 32 is arranged between every two adjacent grid bars 32 in the four grid bars 32 and extends to be connected with the third support ring 33. The arrangement can meet the requirement of the structural strength of the air outlet grid 3 and increase the effective air guiding area of the air outlet grid 3 as much as possible.

[0044] The air conditioner cabinet air duct system utilizes the air outlet grid 3 in the application, can utilize the space between the axial flow fan 2 and the column type air conditioner shell, increase the size of the axial flow fan 2, and further improve the airflow guiding function of the axial flow fan 2 to improve the blowing distance ability of the axial flow fan 2 to a distance.

[0045] The air conditioner cabinet air duct system utilizes the air outlet grid 3 in the application, can utilize the space between the axial flow fan 2 and the column type air conditioner shell, and the width size of the air outlet grid 3 is periodically changed along the circumferential direction of the rotating shaft 21 of the axial flow fan 2, which is beneficial to dispersing the airflow blown out by the axial flow fan 2 by using the air outlet grid 3 and further reducing the noise.

[0046] Embodiment 3

[0047] As shown in Figure 6 An embodiment of the application provides a column type air conditioner which comprises the air conditioner cabinet air duct system in embodiment 2;

[0048] Since the column type air conditioner usually adopts a U-shaped evaporator 1, the size of the axial flow fan 2 is limited when the axial flow fan 2 is nested in the structure space of the U-shaped evaporator 1. When the performance of the axial flow fan 2 needs to be improved, the axial direction size of the axial flow fan 2 can only be increased, which also causes the waste of the space between the axial flow fan 2 and the column type air conditioner shell. The application can move the axial flow fan 2 forward, close to the front side of the column type air conditioner shell, effectively utilize the space between the U-shaped evaporator 1 and the column type air conditioner shell, increase the diameter size of the axial flow fan 2 and also increase the axial direction size of the axial flow fan 2 to improve the overall performance.

[0049] In the case of the same appearance structure of the column type air conditioner, the axial flow fan 2 of the present application can improve the performance of the axial flow fan 2 without affecting the external features of the column type air conditioner, and can ensure the appearance without affecting the reliability of transportation due to the protruding structure of the column type air conditioner.

[0050] Meanwhile, the column type air conditioner can be provided with a sliding plate (not shown in the drawings) at the air outlet of the axial flow fan 2. When the air conditioner is turned off, the sliding plate can be closed to seal the air outlet to block dust. When the air conditioner is turned on, the sliding plate can be removed to hide in the column type air conditioner to open the air outlet for air guiding.

[0051] The column type air conditioner and the column type air conditioner shell are in the shape of a cylinder.

[0052] As Figure 1 :

[0053] The distance M0 between the existing axial flow fan 2 and the air outlet on the front side of the column type air conditioner shell, the diameter D0 of the axial flow fan 2, the distance N0 between the two sides of the axial flow fan 2 and the inner wall of the column type air conditioner shell, and the length A0 of the rotating shaft 21 of the axial flow fan 2.

[0054] As Figure 4 :

[0055] In the case of the column type air conditioner installed with the axial flow fan 2 of the present application, the distance M1 between the axial flow fan 2 and the air outlet on the front side of the column type air conditioner shell, the diameter D1 of the axial flow fan 2, the distance N1 between the two sides of the axial flow fan 2 and the inner wall of the column type air conditioner shell, and the length A1 of the rotating shaft 21 of the axial flow fan 2.

[0056] As Figure 5 :

[0057] In the case of the column type air conditioner installed with the axial flow fan 2 of the present application and the cross flow fan 4 arranged between the axial flow fan 2 and the U-shaped evaporator 1, the distance M2 between the axial flow fan 2 and the air outlet on the front side of the column type air conditioner shell, the diameter D2 of the axial flow fan 2, and the distance N2 between the two sides of the axial flow fan 2 and the inner wall of the column type air conditioner shell.

[0058] In the case of the same size of the column type air conditioner shell, M0 is obviously greater than M1 and M2, D0 is obviously smaller than D1 and D2, N0 is obviously greater than N1 and N2, and A0 is obviously smaller than A1. Figure 1 Figure 4 and Figure 5 The structure arrangement and design of the axial flow fan 2 in Figure 2 and Figure 3 are more reasonable, which can increase the air outlet efficiency.

[0059] Example 4​

[0060] As Figure 6 shown in the figure, one embodiment of the present application proposes a cylindrical air conditioner, which comprises an air duct system of the air conditioner cabinet in embodiment 2, a through-flow air outlet 5 is opened at the lower front side of the cylindrical air conditioner shell, an axial-flow air outlet is opened at the upper front side of the cylindrical air conditioner shell, an air inlet 6 is opened at the rear side of the cylindrical air conditioner shell, a through-flow fan 4 is arranged in the cylindrical air conditioner shell in the vertical direction, the through-flow fan 4 is partially opposite to the through-flow air outlet 5, and the other part is opposite to the axial-flow air outlet, an air outlet grille 3 is installed at the axial-flow air outlet, and the axial-flow fan 2 of the present application is installed between the through-flow fan 4 and the air outlet grille 3.

[0061] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A axial flow fan comprising a rotating shaft and a plurality of blades arranged circumferentially outside the rotating shaft, characterized in that, The distance from the side of each blade connected with the rotating shaft to the other side of the blade gradually decreases from the side of the blade connected with the rotating shaft to the other side of the blade along the axial direction of the rotating shaft; and the rotating surface of the outlet side of the axial flow fan is an arc surface.

2. An air duct system of a cabinet air conditioner, comprising a column type air conditioner housing and a U-shaped evaporator, characterized in that: The axial flow fan of claim 1 is arranged in a cylindrical air conditioner housing and placed in front of the opening of the U-shaped evaporator, and the edge of each blade and the side of each blade facing the outlet side of the axial flow fan are fitted to the inner side of the cylindrical air conditioner housing.

3. The air duct system of the cabinet air conditioner according to claim 2, wherein: The air outlet grille is arranged at the air outlet of the cylindrical air conditioner housing and located at the outlet side of the axial flow fan, and the air outlet grille is arc-shaped and protrudes away from the axial flow fan.

4. The air duct system of the cabinet air conditioner according to claim 3, wherein: The projection of the air outlet grille on the vertical plane is an ellipse.

5. The air duct system of the cabinet air conditioner according to claim 3, wherein: The air outlet grille comprises: a support outer ring; a plurality of grille bars arranged in a ring shape, one end of each grille bar being connected with the inner side of the support outer ring and the other end of each grille bar extending to the central part of the support outer ring.

6. The air duct system of the cabinet air conditioner according to claim 5, wherein: The width of each grille bar gradually decreases from the side of the grille bar connected with the support outer ring to the other side of the grille bar along the air outlet direction of the axial flow fan.

7. The air duct system of the cabinet air conditioner according to claim 5, wherein: The plurality of grille bars are arranged in an arc shape on the same side.

8. The air duct system of the cabinet air conditioner according to claim 6, wherein: The width variation of the grille bars located in the upper and lower regions of the support outer ring is greater than the width variation of the grille bars located in the left and right regions of the support outer ring.

9. The air duct system of the cabinet air conditioner according to claim 5, wherein: The lengths of the plurality of grille bars are not completely the same, and a plurality of support rings arranged from inside to outside are formed in the support outer ring, and each support ring is fixedly connected with at least part of the grille bars.

10. A column type air conditioner, characterized by: The air conditioner cabinet air duct system comprises the air outlet grille of any one of claims 2-9.

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