Fan shell, fan and air treatment equipment

Abstract

The utility model discloses a fan shell, fan and air handling equipment, the fan shell comprises: a shell body and an air guide ring, the air guide ring is arranged in the shell body and defines a mounting space for accommodating a wind wheel, at least part of the air guide ring is provided with a flow guide hole, and the flow guide hole is communicated with the shell body. And the mounting space is communicated with the external space along the radial direction. According to the fan shell, the flow guide cavity is formed in the air guide ring, the inner side of the air guide ring can be communicated with the outer side of the air guide ring, airflow on the outer side of the air guide ring is guided to the inner side of the air guide ring through the pressure difference generated by rotation of the wind wheel, flow separation is effectively improved, and the technical effect of reducing and improving vortex de-noising is achieved.

Description

Technical Field

[0001] The utility model relates to the field of household electrical appliances, in particular to a fan housing, a fan and air processing equipment. Background Art

[0002] In the related art, the air guide ring is integrated with the fan housing, and a pressure difference is generated when the wind wheel rotates, thereby promoting air flow movement.

[0003] However, the airflow generated by the rotation of the wind rotor is located on a plane perpendicular to the axis of the wind rotor and develops forward in the wind outlet direction. When passing through the air guide ring, flow separation will occur, exacerbating the vortex shedding noise. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a fan housing, which can improve flow separation and reduce fan noise.

[0005] The utility model further proposes a fan adopting the fan housing.

[0006] The utility model also provides an air treatment device adopting the fan.

[0007] According to the first aspect of the present invention, the fan casing comprises: a casing body and an air guide ring, wherein the air guide ring is arranged on the casing body and defines an installation space for accommodating a wind wheel, and at least a portion of the air guide ring is provided with guide holes so that the installation space is radially connected with an external space.

[0008] According to the fan housing of the embodiment of the utility model, a guide hole is provided on the air guide ring, so that the inner side of the air guide ring can be connected with the outer side of the air guide ring, and the airflow outside the air guide ring can be guided to the inner side of the air guide ring through the pressure difference generated by the rotation of the wind wheel, thereby effectively improving the flow separation, so as to achieve the technical effect of reducing and improving the vortex shedding noise.

[0009] According to some embodiments of the present utility model, the air guide ring includes a straight section and a connecting section extending in the axial direction, the connecting section is connected to the shell body, and the air guide hole is formed on the straight section.

[0010] In some embodiments, the guide hole is configured as a round hole or a square hole.

[0011] Furthermore, the diameter of the guide hole is 2 mm to 6 mm; or the side length of the guide hole is 2 mm to 6 mm.

[0012] Furthermore, the guide hole is a circular hole, and the ratio of the volume of the guide hole to the volume of the solid part of the air guide ring is 10% to 35%.

[0013] Furthermore, the guide hole is a square hole, and the ratio of the volume of the guide hole to the volume of the solid part of the air guide ring is 10% to 42%.

[0014] According to some embodiments of the utility model, the air guide holes are arranged in an array on the air guide ring.

[0015] The fan according to the second embodiment of the utility model includes: a mounting bracket, a motor, a wind wheel and a fan housing, the wind wheel is arranged on the motor shaft of the motor, the motor is mounted on the mounting bracket, the mounting bracket is connected to the fan housing, and the wind wheel extends into the air guide ring.

[0016] Furthermore, the inner wall of the air guide ring is spaced apart from the wind wheel.

[0017] The air treatment equipment according to the embodiment of the third aspect of the utility model includes: the fan described in the above embodiment.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic diagram of a fan housing according to an embodiment of the utility model;

[0021] Figure 2 is a schematic diagram of a fan according to an embodiment of the utility model;

[0022] Figure 3 is a schematic diagram of an air guide ring according to an embodiment of the utility model;

[0023] Figure 4 is a schematic diagram of an air guide ring according to another embodiment of the utility model;

[0024] Figure 5 is a schematic diagram of pressure streamlines of an air guide ring according to an embodiment of the utility model;

[0025] Figure 6 is a comparison diagram of the vortex characteristics according to the embodiment of the utility model and the vortex characteristics of the prior art;

[0026] Figure 7 It is a comparison chart of flow separation distribution range of guide holes with different opening sizes and opening shapes and the prior art.

[0027] Reference numerals:

[0028] Fan 100,

[0029] Fan housing 10, housing body 11, air guide ring 12, straight section 121, connecting section 122, air guide hole 123,

[0030] The bracket 20 , the motor 30 , and the wind wheel 40 are installed. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the present invention and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0033] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0039] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0040] The term "plurality" used in the present invention refers to more than two (including two).

[0041] Reference below Figure 1-Figure 7 A fan housing 10 , a fan 100 , and an air handling device according to an embodiment of the present invention are described.

[0042] like Figure 1 and Figure 2As shown, the fan housing 10 according to the embodiment of the first aspect of the utility model includes: a shell body 11 and an air guide ring 12, the air guide ring 12 is arranged on the shell body 11, and defines an installation space for accommodating the wind wheel 40, and at least a part of the air guide ring 12 is provided with a guide hole 123 to make the installation space radially connected with the external space.

[0043] It should be pointed out that during the operation of the fan 100, the wind wheel 40 is arranged inside the fan housing 10, and the rotation of the wind wheel 40 causes a pressure difference between the inside and outside of the fan housing 10 to achieve turbulence, promote the movement of airflow and achieve wind-induced effects such as heat exchange or driving. However, the airflow cross-section formed during the rotation of the wind wheel 40 is generally plane, and the flow trajectory of the airflow along the axial direction of the wind wheel 40 is generally cylindrical. When the airflow flows through the air guide ring 12 area, flow separation is easily generated, and the vortex shedding noise is aggravated.

[0044] The inside and outside directions involved in the embodiments of the present invention are relative concepts, such as: the direction toward the axis of the fan 100 is inside, and the direction away from the axis of the fan 100 is outside. Taking the physical structure of the air guide ring 12 as the boundary, the side of the air guide ring 12 facing the axis is the inside of the air guide ring 12, and the side of the air guide ring 12 away from the axis is the outside of the air guide ring 12.

[0045] Based on this, the utility model sets a guide hole 123 on the air guide ring 12. Since there is a pressure difference between the inside of the air guide ring 12 and the outside of the air guide ring 12, by setting the guide hole 123, the airflow outside the air guide ring 12 can be guided to the inside of the air guide ring 12 based on the pressure difference, so as to improve flow separation and thus improve vortex shedding noise.

[0046] According to the fan housing 10 of the embodiment of the utility model, a guide hole is set on the air guide ring 12, so that the inner side of the air guide ring 12 can be connected with the outer side of the air guide ring 12, and the pressure difference generated by the rotation of the wind wheel 40 can be used to guide the airflow outside the air guide ring 12 to the inner side of the air guide ring 12, thereby effectively improving the flow separation, so as to achieve the technical effect of reducing and improving the vortex shedding noise.

[0047] As shown in the figure, according to some embodiments of the present invention, the air guide ring 12 includes a straight section 121 and a connecting section 122 extending along the axial direction. The connecting section 122 is connected to the shell body 11 , and a guide hole 123 is formed on the straight section 121 .

[0048] Specifically, the air guide ring 12 is generally cylindrical, and includes a straight section 121 whose extension direction is parallel to the axial direction, a section located in the straight section 121, extending radially outward relative to the straight section 121, and at least the area connected to the straight section 121 is constructed as an arc-shaped connecting section 122, one end of the connecting section 122 is connected to the straight section 121, and the other end of the connecting section 122 is connected to the fan housing 10, and a guide hole 123 is provided on the straight section 121.

[0049] Therefore, by setting the guide hole 123 on the straight section 121 that produces flow separation, the flow separation can be effectively improved, and there is no need to set the guide hole 123 on the connecting section 122. The structural strength of the air guide ring 12 can be improved, the connection stability and reliability between the air guide ring 12 and the shell body 11 can be ensured, and the processing difficulty of the air guide ring 12 can be reduced, thereby reducing the cost.

[0050] It can be understood that the side of the connecting section 122 close to the wind wheel 40 has a tendency to expand radially outward, and is at least partially constructed in an arc shape. When the airflow passes through the arc transition surface, no large flow separation will occur. Therefore, it is only necessary to set a guide hole 123 on the finger tip.

[0051] like Figure 3 and Figure 4 As shown, in some embodiments, the guide hole 123 is configured as a round hole or a square hole.

[0052] Exemplarily, in some embodiments, the guide holes 123 are constructed as round holes, and in other embodiments, the guide holes 123 are constructed as square holes. The guide holes 123 can be evenly arranged in an array on the straight section 121, or the guide holes 123 can be opened in different areas and positions of the straight section 121 according to the flow field characteristics of the air guide ring 12. Reducing the number of guide holes 123 can not only reduce the process cost, but also effectively improve the flow separation and reduce the working noise of the fan 100.

[0053] In the embodiment where the guide hole 123 is a round hole, the diameter of the guide hole 123 is 2 mm to 6 mm; in the embodiment where the guide hole 123 is a square hole, the side length of the guide hole 123 is 2 mm to 6 mm.

[0054] It should be pointed out that the guide holes 123 opened on the straight section 121 can all be round holes, or all be square holes, or some can be round holes and some can be square holes. The side lengths of the multiple square holes can be the same or different, such as: some square holes have a side length of 2mm, some have a side length of 4mm, and some have a side length of 6mm. The diameters of the multiple circular holes can be the same or different, such as some circular holes have a diameter of 2mm, some have a diameter of 4mm, and some have a diameter of 6mm.

[0055] It can be understood that the airflow in the area where the straight section 121 is located will produce flow separation, generate backflow, and the airflow cannot effectively flow into the environment. The pressure distribution and streamlines in this area are as follows: Figure 5 As shown, the backflow and flow separation in the area where the straight section 121 is located will cause the turbulence intensity to increase, thereby intensifying the vortex shedding noise. At the same time, the airflow in this area will expand in the circumferential direction along with the wind wheel 40, develop into a larger blade tip vortex, and further intensify the noise of the fan 100.

[0056] Based on this, the utility model sets the guide hole 123, which can not only improve the flow separation, but also suppress the expansion of the tip vortex. The turbulence intensity can be reduced, so that the interference between the tip vortex and the wind wheel 40 is reduced, so as to effectively suppress the noise.

[0057] See also Figure 6 As shown, Figure 6 Schematic diagram of the inner vortex characteristics of the air guide ring 12 of the prior art and the utility model.

[0058] Among them, in the prior art, the flow separation range will gradually increase, and the tip vortex structure will develop from a small vortex to a large vortex. However, after the guide hole 123 is set in the utility model, when the airflow moves to the opening, the development of the vortex is suppressed, and it will basically stick to the straight section 121 of the air guide ring 12 and will not expand rapidly.

[0059] Noise reduction table

[0060] Example Contrast(dB) Drop value (dB) Round 4mm 50.91 0.09 Square 4mm 50.88 0.12 Round 6mm 50.82 0.18 Square 2mm 50.75 0.25

[0061] See also Figure 7 As shown in the above table, Figure 7 The flow separation distribution range comparison diagram of the flow guide holes 123 with different opening sizes and opening shapes and the prior art is 2600m 3 Noise reduction table at / h air volume.

[0062] It can be seen from the figure that compared with the prior art, the square embodiment with a side length of 2mm, the square embodiment with a side length of 4mm, the circular embodiment with a diameter of 4mm and the circular embodiment with a diameter of 2mm can all significantly reduce noise. Although the circular diameter embodiment with a diameter of 6mm and the square embodiment with a side length of 6mm have poor effects on suppressing the tip vortex, they can also effectively improve the flow separation.

[0063] Furthermore, the guide hole 123 is a round hole, and the ratio of the volume of the guide hole 123 to the volume of the solid part of the air guide ring 12 is: 10% to 35%; the guide hole 123 is a square hole, and the ratio of the volume of the guide hole 123 to the volume of the solid part of the air guide ring 12 is 10% to 42%.

[0064] In this way, it is possible to avoid having too many openings of the guide holes 123 or too large opening sizes, so as to ensure the structural strength and stability of the air guide ring 12, avoid shaking of the air guide ring 12, and improve the noise of the fan 100. On the other hand, it is possible to avoid having too few openings of the guide holes 123 or too small opening sizes, so as to avoid the setting of the guide holes 123 causing buzzing sounds in the fan 100, improve the noise of the fan 100, and enhance the user experience.

[0065] like Figure 3 and Figure 4As shown, according to some embodiments of the present invention, the air guide holes 123 are arranged in an array on the air guide ring 12. In this way, the processing difficulty of the air guide holes 123 can be reduced, and the processing cost can be reduced.

[0066] like Figure 2 As shown, a fan 100 according to an embodiment of the second aspect of the utility model includes: a mounting bracket 20, a motor 30, a wind wheel 40 and a fan housing 10, the wind wheel 40 is arranged on the motor 30 shaft of the motor 30, the motor 30 is installed on the mounting bracket 20, the mounting bracket 20 is connected to the fan housing 10, and the wind wheel 40 extends into the air guide ring 12.

[0067] It should be pointed out that the mounting bracket 20 is mounted on the fan housing 10, the motor 30 is fixed to the mounting bracket 20 by bolts, the wind wheel 40 is fixed to the shaft of the motor 30, and the wind wheel 40 is driven to rotate by the rotation of the shaft of the motor 30. As a rotating component, the wind wheel 40 needs to have a gap of about 7 mm with the inner annular surface of the air guide ring 12 fixed to the fan housing 10 (that is, the inner wall of the air guide ring 12 is separated from the wind wheel 40). This gap will cause flow separation in the area of ​​the air guide ring 12, resulting in backflow, and the airflow cannot flow effectively to the environment. The pressure distribution and streamlines in this area are as follows: Figure 5 The increase in turbulence intensity caused by the backflow and flow separation in this area will cause noise, and the airflow there will also expand in the circumferential direction along with the rotation of the wind wheel 40, developing into a larger blade tip vortex.

[0068] According to the fan 100 of the embodiment of the utility model, by setting the guide hole 123 on the air guide ring 12 and making the size of the guide hole 123 meet the above-mentioned size range, the flow separation can be effectively improved and the increase of the blade tip vortex can be suppressed, so as to further reduce the working noise of the fan 100 and improve the user experience of the fan 100.

[0069] The air handling equipment according to the embodiment of the third aspect of the utility model includes: the fan in the above embodiment.

[0070] Exemplarily, when the air treatment device is configured as an outdoor unit of an air conditioner, the air treatment device includes a housing and a fan 100 , the housing has a front panel, the fan 100 is disposed in the housing, and the fan housing 10 is formed as the front panel.

[0071] It should be pointed out that the air treatment equipment can be an indoor air treatment equipment equipped with a wind wheel 40, such as a fan, a driver, and an air conditioner indoor unit, etc. The air treatment equipment can also be an outdoor air treatment equipment equipped with a wind wheel 40, such as an air conditioner outdoor unit, an outdoor fan 100, etc.

[0072] According to the air treatment equipment of the embodiment of the utility model, the above-mentioned fan 100 is adopted to reduce the working noise of the air treatment equipment and improve the user experience.

[0073] Other structures and operations of the fan housing 10, the fan 100 and the air treatment equipment according to the embodiment of the utility model are well known to those skilled in the art and will not be described in detail here.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention 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 invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fan housing, characterized in that: include: Shell body; An air guide ring is arranged on the shell body and defines an installation space for accommodating the wind wheel, and at least a portion of the air guide ring is provided with guide holes so that the installation space is radially connected with the external space.

2. The fan housing according to claim 1, characterized in that: The air guide ring comprises a straight section and a connecting section extending in the axial direction, the connecting section is connected to the shell body, and the air guide hole is formed on the straight section.

3. The fan housing according to claim 1, characterized in that: The flow guide hole is configured as a round hole or a square hole.

4. The fan housing according to claim 3, characterized in that: The diameter of the guide hole is 2 mm to 6 mm; or the side length of the guide hole is 2 mm to 6 mm.

5. The fan housing according to claim 3, characterized in that: The guide hole is a circular hole, and the ratio of the volume of the guide hole to the volume of the solid part of the air guide ring is 10% to 35%.

6. The fan housing according to claim 3, characterized in that: The guide hole is a square hole, and the ratio of the volume of the guide hole to the volume of the solid part of the air guide ring is 10% to 42%.

7. The fan housing according to any one of claims 1 to 6, characterized in that: The air guide holes are arranged in an array on the air guide ring.

8. A fan, characterized in that: include: Mounting bracket; A motor and a wind wheel, wherein the wind wheel is arranged on the motor shaft of the motor, and the motor is mounted on the mounting bracket; The fan housing according to any one of claims 1 to 7, wherein the mounting bracket is connected to the fan housing, and the wind wheel extends into the air guide ring.

9. The fan according to claim 8, characterized in that: The inner wall of the air guide ring is spaced apart from the wind wheel.

10. An air treatment device, characterized in that: include: The fan according to claim 8 or 9.

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