Mixed flow fans and air conditioners

Abstract

The present invention provides a mixed flow fan and air conditioner. The mixed flow fan comprises a hub; mixed flow blades, with multiple mixed flow blades spaced apart along the circumference of the hub; and an outer ring, disposed on the outer periphery of the multiple mixed flow blades and connected to the hub via the mixed flow blades. The mixed flow blades include extensions that extend beyond the outer ring. The technical solution of the present invention solves the problem in the prior art where airflow can only flow into or out of the mixed flow blades along the axial direction of the outer ring.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a mixed flow fan and an air conditioner. Background Art

[0002] The fans in air conditioners are typically cross-flow fans, centrifugal fans, and axial-flow fans. Cross-flow fans can achieve radial airflow and radial airflow; centrifugal fans can achieve axial airflow and radial airflow, and can change the airflow direction; axial-flow fans can achieve axial airflow and axial airflow, and can meet the requirements of straight airflow and exhaust.

[0003] The mixed flow fan is between the centrifugal fan and the axial flow fan, but the mixed flow blades of the mixed flow fan in the related art are all located in the outer ring, resulting in the air flow only being able to flow into or out of the mixed flow blades along the axial direction of the outer ring. Summary of the Invention

[0004] The main purpose of the present invention is to provide a mixed flow fan and an air conditioner to solve the problem in the prior art that the air flow can only flow into or out of the mixed flow blade along the axial direction of the outer ring.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a mixed flow fan is provided, comprising: a hub; mixed flow blades, wherein a plurality of mixed flow blades are arranged at intervals along the circumference of the hub; an outer ring, wherein the outer ring is arranged on the outer peripheral side of the plurality of mixed flow blades, and the outer ring is connected to the hub through the mixed flow blades; wherein the mixed flow blades include an extension portion, and the extension portion extends outside the outer ring.

[0006] Furthermore, an air flow channel is formed between the outer ring and the hub; along the axial direction of the outer ring, the air flow channel has an air inlet and an air outlet; the extension portion extends from the air inlet and / or the air outlet to the outside of the outer ring, so that the air flow flows into or out of the air flow channel along the axial direction and / or radial direction of the hub.

[0007] Furthermore, along the axial direction of the hub, the height of the protruding portion is H1, and the height of the mixed flow blade is H2, wherein 1 / 5≤H1 / H2≤1 / 2.

[0008] Further, H1 / H2=1 / 3 or H1 / H2=1 / 4.

[0009] Furthermore, the mixed flow fan further comprises a splitter blade, which is arranged between two adjacent mixed flow blades; wherein the length of the splitter blade in the axial direction of the hub is smaller than the length of the mixed flow blade in the axial direction of the hub.

[0010] Furthermore, a splitter blade is provided between any two adjacent mixed flow blades.

[0011] Furthermore, the splitter blades are arranged close to the air outlet.

[0012] Furthermore, the fourth end surface of the splitter blade away from the air inlet is flush with the third end surface of the mixed flow blade away from the air inlet.

[0013] Furthermore, the inner diameter of the outer ring gradually increases along the direction from the air inlet to the air outlet, or, along the direction from the air inlet to the air outlet, the inner diameter of the outer ring gradually increases and then gradually decreases.

[0014] Furthermore, the hub has an inner ring, and a plurality of mixed flow blades are arranged on the outer circumferential wall of the inner ring at intervals around the circumference of the inner ring; the mixed flow blades are arranged between the inner ring and the outer ring; wherein, along the axial direction of the outer ring, the first end face of the outer ring away from the air inlet is flush with the second end face of the inner ring away from the air inlet; or along the axial direction of the outer ring, the first end face of the outer ring away from the air inlet is higher than the second end face of the inner ring away from the air inlet; or along the axial direction of the outer ring, the first end face of the outer ring away from the air inlet is lower than the second end face of the inner ring away from the air inlet.

[0015] Furthermore, the third end surface of the mixed flow blade away from the air inlet is flush with the first end surface and the second end surface.

[0016] According to another aspect of the present invention, an air conditioner is provided, comprising the mixed flow fan described above.

[0017] Furthermore, the air conditioner includes: a shell, the shell has an upper air port and a lower air port, and a mixed flow fan is arranged in the shell; a heat exchanger, the heat exchanger is arranged in the air conditioner, the mixed flow fan can introduce the air flow outside the shell into the shell through the upper air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the lower air port; or, the mixed flow fan can introduce the air flow outside the shell into the shell through the lower air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the upper air port.

[0018] By applying the technical solution of the present invention, since the extended portion of the mixed flow blade extends outside the outer ring, the airflow outside the outer ring can flow into or out of the mixed flow blade along the axial direction of the hub, and can also flow into or out of the mixed flow blade along the radial direction of the hub, thereby enabling the mixed flow fan provided by this application to achieve the technical effect of both axial and radial air intake or outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a mixed flow fan according to the first embodiment of the present invention is shown;

[0021] Figure 2 Shown Figure 1 Schematic diagram of the main structure of the mixed flow fan;

[0022] Figure 3 Shown Figure 2 Schematic diagram of the cross-sectional structure of the mixed flow fan;

[0023] Figure 4 Shown Figure 1 Schematic diagram of the three-dimensional structure of the hub and mixed flow blades of the mixed flow fan;

[0024] Figure 5 Shown Figure 4 Schematic diagram of the main structure of the hub and mixed flow blades;

[0025] Figure 6 A schematic diagram of the three-dimensional structure of a hub, mixed flow blades and splitter blades of a mixed flow fan according to a second embodiment of the present invention is shown;

[0026] Figure 7 6 shows a schematic diagram of the main structure of the hub, mixed flow blades and splitter blades.

[0027] The above drawings include the following reference numerals:

[0028] 10. Hub; 11. Inner ring; 111. Second end face; 20. Mixed flow blade; 201. Extension; 21. Third end face; 30. Outer ring; 31. First end face; 301. Air flow channel; 302. Air inlet; 303. Air outlet; 40. Splitter blade; 41. Fourth end face. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In order to solve the problem in the prior art that airflow can only flow into or out of the mixed flow blade along the axial direction of the outer ring, the present invention provides a mixed flow fan and an air conditioner.

[0031] Example 1

[0032] like Figures 1 to 5As shown, the mixed flow fan includes a hub 10, mixed flow blades 20 and an outer ring 30. A plurality of mixed flow blades 20 are arranged at intervals along the circumference of the hub 10. The outer ring 30 is arranged on the outer peripheral side of the plurality of mixed flow blades 20. The outer ring 30 is connected to the hub 10 through the mixed flow blades 20. The mixed flow blades 20 include an extension portion 201, which extends out of the outer ring 30.

[0033] In this embodiment, since the extension portion 201 of the mixed flow blade 20 extends outside the outer ring 30, the airflow outside the outer ring 30 can flow into or out of the mixed flow blade 20 along the axial direction of the hub 10, and can also flow into or out of the mixed flow blade 20 along the radial direction of the hub 10, thereby enabling the mixed flow fan provided in this application to achieve the technical effect of both axial and radial air intake or outlet.

[0034] Optionally, an airflow channel 301 is formed between the outer ring 30 and the hub 10. Along the axial direction of the outer ring 30, the airflow channel 301 has an air inlet 302 and an air outlet 303. The extension 201 extends from the air inlet 302 and / or the air outlet 303 to the outside of the outer ring 30, allowing airflow to flow into or out of the airflow channel 301 axially and / or radially along the hub 10. In this way, the extension 201 can be located either on the air inlet side or the air outlet side. By changing the position of the extension 201, the airflow direction can be changed, providing new options for the development of different models.

[0035] Specifically, when the extension 201 extends from the air inlet 302 to the outside of the outer ring 30, the airflow flows into the airflow channel 301 along the axial direction of the hub 10 and / or the radial direction of the hub 10, and then flows out through the air outlet 303 under the guiding action of the mixed flow blade 20; when the extension 201 extends from the air outlet 303 to the outside of the outer ring 30, the airflow enters the airflow channel 301 from the air inlet 302 under the guiding action of the mixed flow blade 20, and then flows out of the airflow channel 301 along the axial direction of the hub 10 and / or the radial direction of the hub 10 under the guiding action of the mixed flow blade 20.

[0036] exist Figures 1 to 3 In the illustrated alternative embodiment, the extension 201 extends axially from the air inlet 302 of the outer ring 30 to the exterior of the outer ring 30. This allows airflow to enter the mixed flow blades 20 axially and radially from the extension 201 exposed to the outer ring 30, thereby increasing the mixed flow fan's performance and providing new options for the development of different fan models.

[0037] like Figure 3 As shown, along the axial direction of the hub 10, the height of the extension 201 is H1, and the height of the mixed flow blade 20 is H2, wherein 1 / 5≤H1 / H2≤1 / 2. Tests have shown that when the height H1 of the extension 201 is within the above numerical range, the fan has a better performance.

[0038] Optionally, H1 / H2=1 / 3. Tests have shown that when the height H1 of the extension portion 201 is within the above numerical range, the fan has a better performance.

[0039] Optionally, H1 / H2=1 / 4. Experiments have shown that when the height H1 of the extension portion 201 is within the above numerical range, the fan has a better performance.

[0040] Optionally, the inner diameter of the outer ring 30 gradually increases along the direction from the air inlet 302 to the air outlet 303, which is compatible with the structure of the mixed flow blade 20, so that the wind blown out by the mixed flow fan is discharged along the axial and circumferential directions of the mixed flow fan, which is beneficial to enhancing the circumferential air volume of the mixed flow fan and meeting the use effect of enhancing the circumferential air outlet.

[0041] like Figure 3 As shown, the inner diameter of the outer ring 30 gradually increases and then gradually decreases from the air inlet 302 to the air outlet 303. The portion where the inner diameter of the outer ring 30 gradually decreases has a wind-collecting effect, concentrating the air blown out by the mixed flow fan along the axial direction of the mixed flow fan, thereby enhancing the use effect of concentrated air output.

[0042] like Figure 3 As shown, the hub 10 has an inner ring 11, with multiple mixed flow blades 20 arranged on the outer peripheral wall of the inner ring 11 at intervals around the circumference of the inner ring 11. The mixed flow blades 20 are arranged between the inner ring 11 and the outer ring 30. In the axial direction of the outer ring 30, the first end surface 31 of the outer ring 30, which is away from the air inlet 302, is flush with the second end surface 111 of the inner ring 11, which is away from the air inlet 302. This facilitates the processing and assembly of the mixed flow fan.

[0043] like Figures 3 to 5 As shown, the third end surface 21 of the mixed flow blade 20 away from the air inlet 302 is flush with the first end surface 31 and the second end surface 111. This facilitates the processing and assembly of the mixed flow fan.

[0044] In an optional embodiment (not shown) of the present application, along the axial direction of the outer ring 30, the first end surface 31 of the outer ring 30, which is away from the air inlet 302, is higher than the second end surface 111 of the inner ring 11, which is away from the air inlet 302. In this way, the air blown out by the mixed flow fan can be concentrated along the axial direction of the mixed flow fan, achieving the purpose of enhancing the use effect of concentrated air output.

[0045] In an optional embodiment (not shown) of the present application, along the axial direction of the outer ring 30, the first end surface 31 of the outer ring 30, which is away from the air inlet 302, is lower than the second end surface 111 of the inner ring 11, which is away from the air inlet 302. In this way, the inclined third end surface 21 of the mixed flow blade 20 can cause the air blown by the mixed flow fan to be discharged in both the axial and circumferential directions of the mixed flow fan, thereby increasing the circumferential airflow volume of the mixed flow fan and achieving the desired effect of enhancing circumferential airflow.

[0046] Example 2

[0047] The difference between the second embodiment and the first embodiment is that Figure 6 and Figure 7 As shown, the mixed flow fan further includes a splitter blade 40, which is disposed between two adjacent mixed flow blades 20. The splitter blade 40 has a shorter axial length relative to the hub 10 than the mixed flow blade 20. Thus, the splitter blade 40 can achieve a rectifying effect.

[0048] Optionally, a splitter blade 40 is provided between any two adjacent mixing blades 20. By increasing the number of splitter blades 40, the rectifying effect is improved.

[0049] like Figure 6 and Figure 7 As shown, the splitter blades 40 are arranged close to the air outlet 303. In this way, the wind blown out from the air outlet 303 is rectified by the splitter blades 40, and the rectification effect is better.

[0050] like Figure 7 As shown, the fourth end surface 41 of the splitter blade 40 away from the air inlet 302 is flush with the third end surface 21 of the mixed flow blade 20 away from the air inlet 302, so that the processing and assembly of the mixed flow fan are facilitated.

[0051] According to another aspect of the present application, an air conditioner is provided, including the aforementioned mixed flow fan. Different fans can meet different air conditioner product requirements. The mixed flow fan provided in the present application can inlet or outlet air along both the axial and radial directions of the hub 10, thereby increasing the mixed flow fan's work capacity, thereby facilitating improved air conditioner performance and providing new options for developing different air conditioner models.

[0052] Optionally, the air conditioner includes a housing and a heat exchanger, the housing having an upper air outlet and a lower air outlet, a mixed flow fan disposed within the housing, and the heat exchanger disposed within the air conditioner, wherein the mixed flow fan can introduce airflow outside the housing into the housing through the upper air outlet, perform heat exchange with the heat exchanger, and then discharge the airflow outside the housing through the lower air outlet; alternatively, the mixed flow fan can introduce airflow outside the housing into the housing through the lower air outlet, perform heat exchange with the heat exchanger, and then discharge the airflow outside the housing through the upper air outlet. The air conditioner provided in this application has two operating modes, and the user can select upper air outlet or lower air outlet according to actual needs, thereby improving the performance of the air conditioner.

[0053] Optionally, when the air conditioner is in cooling mode, the air conditioner is in an upward air outlet mode to avoid cold air blowing directly on the user, avoid affecting the user's health, and help improve the user's experience; when the air conditioner is in heating mode, the air conditioner is in a downward air outlet mode, using the principle of hot air moving upward and cold air moving downward to heat the indoor temperature, thereby improving the heating effect of the air conditioner and making the user's feet feel warm, which is conducive to further improving the user's experience.

[0054] Optionally, the air conditioner further includes an air flow channel switching mechanism disposed inside the shell, which controls the air flow channel switching mechanism to change the direction of the air flow to achieve the effect of upward air intake and downward air outlet, or to achieve the effect of downward air intake and upward air outlet.

[0055] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0056] The present application provides a new type of mixed flow blade. The new type of mixed flow blade is a structure in which the outer ring 30 does not completely wrap the mixed flow blade 20, and part of the mixed flow blade is exposed at the lower end. This is equivalent to a new structure that combines traditional mixed flow blades and axial flow blades in series. It can have the characteristics of both types of blades at the same time. The airflow can enter the mixed flow blade 20 along the axial and radial directions of the hub 10 at the same time, increasing the work capacity of the fan and providing new options for the development of different models to meet the needs of different air-conditioning products.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0059] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0062] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A mixed flow fan, characterized in that: include: Hub (10); Mixed flow blades (20), a plurality of the mixed flow blades (20) being arranged at intervals along the circumference of the hub (10); an outer ring (30), the outer ring (30) being arranged on the outer peripheral side of the plurality of mixed flow blades (20), the outer ring (30) being connected to the hub (10) via the mixed flow blades (20); The mixed flow blade (20) comprises a protruding portion (201), and the protruding portion (201) protrudes outside the outer ring (30); An air flow channel (301) is formed between the outer ring (30) and the hub (10); along the axial direction of the outer ring (30), the air flow channel (301) has an air inlet (302) and an air outlet (303); the extension portion (201) extends from the air inlet (302) and / or the air outlet (303) to the outside of the outer ring (30), so that air flows into or out of the air flow channel (301) along the axial direction of the hub (10) and / or the radial direction of the hub (10); The mixed flow fan further comprises a splitter blade (40), wherein the splitter blade (40) is arranged between two adjacent mixed flow blades (20); wherein the length of the splitter blade (40) in the axial direction of the hub (10) is smaller than the length of the mixed flow blade (20) in the axial direction of the hub (10); and the splitter blade (40) is arranged close to the air outlet (303); Along the direction from the air inlet (302) to the air outlet (303), the inner diameter of the outer ring (30) gradually increases, or, along the direction from the air inlet (302) to the air outlet (303), the inner diameter of the outer ring (30) gradually increases and then gradually decreases; Along the axial direction of the hub (10), the height of the protruding portion (201) is H1, and the height of the mixed flow blade (20) is H2, wherein 1 / 5≤H1 / H2≤1 / 2.

2. The mixed flow fan according to claim 1, characterized in that H1 / H2=1 / 3 or H1 / H2=1 / 4.

3. The mixed flow fan according to claim 1 or 2, characterized in that: One splitter blade (40) is provided between any two adjacent mixed flow blades (20).

4. The mixed flow fan according to claim 1 or 2, characterized in that: The fourth end surface (41) of the splitter blade (40) away from the air inlet (302) is flush with the third end surface (21) of the mixed flow blade (20) away from the air inlet (302).

5. The mixed flow fan according to claim 1 or 2, characterized in that: The hub (10) has an inner ring (11), and a plurality of mixed flow blades (20) are arranged on the outer peripheral wall of the inner ring (11) at intervals around the circumference of the inner ring (11); the mixed flow blades (20) are arranged between the inner ring (11) and the outer ring (30); Wherein, along the axial direction of the outer ring (30), a first end surface (31) of the outer ring (30) away from the air inlet (302) is flush with a second end surface (111) of the inner ring (11) away from the air inlet (302); or Along the axial direction of the outer ring (30), a first end surface (31) of the outer ring (30) away from the air inlet (302) is higher than a second end surface (111) of the inner ring (11) away from the air inlet (302); or Along the axial direction of the outer ring (30), a first end surface (31) of the outer ring (30) away from the air inlet (302) is lower than a second end surface (111) of the inner ring (11) away from the air inlet (302).

6. The mixed flow fan according to claim 5, characterized in that The third end surface (21) of the mixed flow blade (20) away from the air inlet (302) is flush with the first end surface (31) and the second end surface (111).

7. An air conditioner, characterized in that: A mixed flow fan comprising the mixed flow fan according to any one of claims 1 to 6.

8. The air conditioner according to claim 7, characterized in that The air conditioner comprises: a housing having an upper air inlet and a lower air inlet, wherein the mixed flow fan is disposed in the housing; The heat exchanger is arranged in the air conditioner, and the mixed flow fan can introduce the airflow outside the shell into the shell through the upper air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the lower air port; or, the mixed flow fan can introduce the airflow outside the shell into the shell through the lower air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the upper air port.

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