CN210509654U

CN210509654U - Axial fan and air condensing units

Info

Publication number: CN210509654U
Application number: CN201921237704.5U
Authority: CN
Inventors: 张凯; 刘博�; 赵伟; 何云峰
Original assignee: Trane Air Conditioning Systems China Co Ltd
Current assignee: Trane Air Conditioning Systems China Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-05-12
Anticipated expiration: 2029-08-01

Abstract

The utility model provides an axial fan and air condensing units. The axial flow fan is applied to an outdoor unit of an air conditioner and comprises a fan body and a top cover. The fan main body comprises a hub and a fan blade group arranged on the peripheral wall of the hub, and the top cover is detachably connected to the hub and seals the end part of the hub. The top cap is assembled in fan main part and seals the tip of wheel hub, avoids fan main part rotation in-process fan main part both sides high pressure district and low-pressure region intercommunication, and airflow output is stable, and axial fan's noise reduces. The top cover is sealed at one end of the hub, so that the turbulence of air flow can be reduced, and the energy consumption required by the rotation of the fan main body is reduced. The top cover and the hub can be detachably connected, the whole fan body is convenient to process, the matching performance is good, and the cost is low.

Description

Axial fan and air condensing units

Technical Field

The utility model belongs to the technical field of the refrigeration, a axial fan and air condensing units are related to.

Background

The up-blowing single-fan outdoor unit is fixed on a building or an equipment foundation along the horizontal direction and comprises an equipment main body, a power motor arranged in the equipment main body and an axial flow fan arranged on an output shaft of the power motor, wherein the wind direction of the axial flow fan faces upwards. The axial flow fan is provided with a hub part and fan blade groups distributed on the hub part, and the power motor is connected with the hub part. The hub part is provided with a concave hub space, and rainwater is accumulated on the hub part because the rotation axis of the axial flow fan faces upwards. In the related art, the hub portion is provided with a water passage hole therethrough to discharge accumulated water and reduce the weight and material cost of the hub portion.

However, the axial flow fan is driven by the power motor to rotate and accelerate the air to flow out of the main body of the device, and accordingly, a high pressure area is formed in the air output direction and a low pressure area is formed in the air input direction of the axial flow fan. The through hole penetrates through the hub part, so that the high-pressure area is communicated with the low-pressure area through the through hole, noise and power consumption are improved, part of air flow flows along the through hole to form turbulent flow, and the air volume output by the outdoor unit is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an axial fan and air condensing units.

Specifically, the utility model discloses a technical scheme's first aspect is: the utility model provides an axial fan, is applied to air condensing units, axial fan includes fan main part and top cap, fan main part includes wheel hub and locates the fan blade group of wheel hub periphery wall, the top cap can dismantle connect in wheel hub and seal wheel hub's tip.

Optionally, the fan body is driven by external force to rotate and drive air to flow towards the top cover, and the peripheral wall of the top cover is partially contracted and used for guiding part of air to flow.

Optionally, the top cover comprises a guide portion for guiding the flow of gas, the cross-sectional area of the guide portion gradually decreasing from one end to the other end.

Optionally, a line connecting the midpoint of the hub in the direction of the gyration center line and the minimum gyration radius of the guide part forms an included angle β with respect to the gyration center line of the hub, and a line connecting the midpoint of the hub in the direction of the gyration center line and the maximum gyration radius of the guide part forms an included angle γ with respect to the gyration center line of the hub, wherein 0.5 ≦ β/γ ≦ 0.7.

Optionally, the top cover is positioned to be connected to the fan body and is lockingly connected to the hub by fasteners.

Optionally, the top cover is provided with a positioning portion, the top cover is covered on the hub, and the positioning portion is connected with the hub in an inserting mode.

Optionally, the positioning part comprises at least one positioning groove formed by recessing from the surface; or, the positioning part comprises at least one positioning convex rib convexly arranged on the end wall of the top cover.

Optionally, the height of the top cover protruding from the hub surface is set to h, and the maximum radius of gyration of the fan body is set to d, wherein 3⁰≤arctan(h/d)≤10⁰。

Optionally, the fan body includes a locking portion and a limiting portion provided on the hub, and the top cover is clamped to the limiting portion and locked to the locking portion.

The utility model discloses a technical scheme's second aspect does: an outdoor unit of an air conditioner comprises a unit body, a power motor installed on the unit body, and the axial flow fan, wherein the axial flow fan is assembled on an output shaft of the power motor.

The embodiment of the utility model provides a technical scheme can include following beneficial effect:

the top cap is assembled in fan main part and seals the tip of wheel hub, avoids fan main part rotation in-process fan main part both sides high pressure district and low-pressure region intercommunication, and airflow output is stable, and axial fan's noise reduces. The top cover is sealed at one end of the hub, so that the turbulence of air flow can be reduced, and the energy consumption required by the rotation of the fan main body is reduced. The top cover and the hub can be detachably connected, the whole fan body is convenient to process, the matching performance is good, and the cost is low.

Drawings

Fig. 1 is a schematic perspective view of an axial flow fan according to an exemplary embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a top cover according to an exemplary embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structural view of a top cover according to an exemplary embodiment of the present invention.

Fig. 4 is an exploded view of an axial fan according to an exemplary embodiment of the present invention.

Fig. 5 is a schematic side view of an axial flow fan according to an exemplary embodiment of the present invention.

Fig. 6 is a rear view schematically illustrating an axial flow fan according to an exemplary embodiment of the present invention.

Fig. 7 is a schematic structural view of an outdoor unit of an air conditioner according to an exemplary embodiment of the present invention.

Wherein, the top cover 10; a guide section 11; a positioning portion 12; a fitting portion 13; a fan main body 20; a hub 21; a rotating shaft portion 211; a main body portion 212; a spoke portion 213; a water leakage space 214; a fan blade group 22; a stopper portion 23; a lock portion 24; an apparatus main body 30; a power motor 40.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

As shown in fig. 1 and 2, the present embodiment discloses an axial fan applied to an outdoor unit of an air conditioner, and more particularly, to an outdoor unit of a single fan of an up-blowing type. The axial flow fan comprises a fan main body 20 and a top cover 10 detachably connected to the fan main body 20, wherein the fan main body 20 comprises a hub 21 and a fan blade group 22 arranged on the outer peripheral wall of the hub 21, and the top cover 10 is detachably connected to the hub 21 and closes the end part of the hub 21.

The hub 21 is used for connecting an external power device of the axial flow fan, and the fan blade group 22 is provided with a plurality of fan blades distributed at intervals, for example, three fan blades are provided. Alternatively, the blades are evenly distributed around the outer circumferential wall of the hub 21 to equalize the forces applied during rotation of the axial fan. The axial flow fan is driven by the power equipment to rotate, and the fan blades drive air around the fan main body 20 to flow at an accelerated speed and form stable air flow.

The top cover 10 is detachably connected with the hub 21, and the top cover and the hub are assembled into a whole to form the axial flow fan, so that the assembly efficiency is high. The hub 21 and the top cover 10 can be independently processed, the processing technology and the structural design of the hub 21 are good in flexibility, and the production and material cost of the fan main body 20 is reduced.

The axial flow fan is driven by the power equipment to rotate, so that a high-pressure area is formed on the airflow output side of the axial flow fan. Accordingly, the other side of the axial flow fan forms a corresponding low pressure region to allow air to flow into the low pressure region. The top cover 10 is assembled to the fan body 20 and closes the end of the hub 21 to prevent the high pressure area and the low pressure area on both sides of the fan body 20 from being communicated along the hub 21 during the rotation of the fan body 20, the air flow output is stable, and the noise of the axial flow fan is reduced. The top cover 10 is sealed at one end of the hub 21, and does not form flowing air flow at the hub 21, thereby reducing the turbulence phenomenon of the output air flow of the axial flow fan and reducing the energy consumption required by the rotation of the fan main body 20.

In one embodiment, the fan body 20 is rotated by external force and drives the air to flow toward the top cover 10, and the peripheral wall of the top cover 10 is partially contracted to guide the flow direction of the portion of the air 11. The air is driven by the fan body 20 to accelerate, wherein a part of the air flow is adhered to the surface of the hub 21 and flows along the surface of the hub 21 under the action of air pressure. The top cover 10 is located in the direction in which the fan body 20 drives the air flow to be output, and the air flow flows along the surface of the hub 21 and the top cover 10 and is thrown out from the end face of the top cover 10. The top cover 10 is closed at the end of the hub 21, and the outer peripheral wall of the top cover 10 is partially contracted to form a guide surface for the airflow so as to reduce the range of turbulent flow formed after the airflow is output from the end of the top cover 10. Under the same air quantity, the top cover 10 can reduce the power and noise value of the axial flow fan and improve the air flow direction.

As shown in fig. 1 and 3, in an alternative embodiment, the top cover 10 includes a guide 11 for guiding the flow of gas, and the cross-sectional area of the guide 11 is gradually reduced from one end to the other end. The cover 10 is attached to the end of the hub 21 so that the air flow can escape along the surface of the cover 10. The guide portion 11 is provided at an end of the top cover 10, and serves to guide the flow of the air stream and reduce turbulence of the air stream. The cross-sectional area of the guide portion 11 is the contour area of the outer peripheral wall in the direction perpendicular to the rotation axis of the axial flow fan, and the cross-sectional area of the guide portion 11 is gradually reduced from one end to the other end. Specifically, the guide portion 11 is gradually reduced in cross-sectional size from the fan main body 20 direction toward the end portion direction to form a nearly frustum structure. Alternatively, the outer peripheral wall of the guide portion 11 is shaped into a frustum structure with a smooth and gradual change, so that the flow guiding balance is good, and the airflow flow is stable and concentrated. For example, the guide 11 is provided as an arc-shaped chamfer or a linear chamfer that gradually changes in curvature, and the arc-shaped chamfer includes a circular arc chamfer and a non-circular arc chamfer. Alternatively, the outer peripheral wall of the guiding portion 11 is a frustum structure having a wavy structure, for example, the outer peripheral wall of the guiding portion 11 is a tapered wall surface, and wind guiding grooves recessed from the surface or wind guiding ribs protruding from the surface are distributed on the tapered wall surface at intervals, so that the flow of the air flow is locally divided, and mutual interference is avoided. Alternatively, the center line of the air guiding groove or the air guiding rib is located at a generatrix position, or the center line of the air guiding groove or the air guiding rib intersects obliquely with respect to the axis of the guide portion 11. Alternatively, the outer peripheral wall of the guide portion 11 is shaped into a tapered frustum structure inclined with respect to the axis of the top cover 10 to guide the flow of the air stream in the flow direction with a side load.

As shown in FIG. 5, a line connecting the midpoint of the hub 21 in the direction of the rotation center line and the minimum rotation radius of the guide portion 11 forms an included angle β with respect to the rotation center line of the hub 21, and a line connecting the midpoint of the hub 21 in the direction of the rotation center line and the maximum rotation radius of the guide portion 11 forms an included angle γ with respect to the rotation center line of the hub 21, wherein 0.5. ltoreq. β/γ. ltoreq.0.7.

The hub 21 rotates about a rotation center line of the fan body 20, wherein a center point of the hub 21 in a direction of the rotation center line is a position of an intersection point of a half of an axial length of the hub 21 on the rotation center line, in a frustum structure in which the guide portion 11 is in a normal smooth gradual change, the guide portion 11 forms a minimum rotation radius at an end surface of the top cover 10, i.e., an intersection line of an arc-shaped chamfer and the end surface is a minimum rotation radius curve, a connecting line of a point on the minimum rotation radius curve and the center point of the hub 21 forms an oblique line with respect to the rotation center line, the angle is β.

The ratio between β and γ is adjusted so that the arc-shaped flow guide of the top cover 10 can reduce the turbulence effect of the air flow output by the fan main body 20 and increase the air output, thereby achieving the air guide effect, alternatively, the ratio β/γ can be set to 0.5, 0.55, 0.6, 0.65, 0.7.

In an alternative embodiment, the top cover 10 further includes a fitting portion 13, the guide portion 11 is protruded at one side of the fitting portion 13, and the other side of the fitting portion 13 is connected to the hub 21. The guide portion 11 is partially formed by shrinking from the outer peripheral wall of the fitting portion 13. Alternatively, the outer peripheral wall of the fitting portion 13 is smoothly connected with the outer peripheral wall of the hub 21.

As shown in fig. 1 and 4, the top cover 10 is detachably connected to the hub 21 so that they can be separately processed and are connected to each other in a matching manner. In one embodiment, the top cover 10 is positioned to be coupled to the fan body 20 and is lockingly coupled to the hub 21 by fasteners. The top cover 10 and the fan main body 20 are mutually matched and positioned, so that the assembling precision of the assembling position of the top cover 10 and the hub 21 is high. Optionally, the top cover 10 is connected with the hub 21 in a plugging manner, so that the top cover 10 is connected with the hub 21 in a positioning manner. For example, the top cover 10 is provided with an annular insertion convex rib, a step structure is formed between the insertion convex rib and the end face of the top cover 10, and the hub 21 is provided with an insertion groove corresponding to the insertion convex rib. The top cover 10 is assembled to the hub 21, and the inserting convex ribs are inserted and connected in the inserting grooves, so that the top cover 10 is connected with the hub 21 in a positioning mode, and the assembling precision is high. Optionally, the top cover 10 and the hub 21 are provided with mutually complementary matching structures, and if the top cover 10 and the hub 21 are connected in a matching manner through the sliding grooves and the sliding blocks, the matching effect is good. Optionally, the top cover 10 is snap-fit to the hub 21 to provide a tight fit. For example, the top cover 10 is provided with a clamping structure which is clamped on the hub 21 and then locked on the hub 21 through a fastener, and the assembly efficiency is high.

In an alternative embodiment, the top cover 10 is provided with a positioning portion 12, the top cover 10 covers the hub 21, and the positioning portion 12 is connected with the hub 21 in a plugging manner. The positioning portion 12 is inserted into the hub 21 so as to form a fitting relationship between the top cover 10 and the hub 21. The positioning portion 12 is used for limiting the assembling position between the top cover 10 and the hub 21, so that the assembling precision is improved, and the assembling effect is good. The insertion connection of the positioning portion 12 and the hub 21 includes, but is not limited to: firstly, the insertion matching part of the positioning part 12 and the hub 21 is an annular matching surface. For example, the positioning portion 12 is protruded from the surface of the top cover 10 in a step structure, and the positioning portion 12 is inserted into and locked with the hub 21. Alternatively, the positioning portion 12 is provided with a stepped groove structure recessed from the surface, and the positioning portion 12 is covered on the end portion of the hub 21 and is locked and connected to the hub 21. Secondly, the positioning part 12 is partially inserted and positioned with the hub 21. For example, the locating portion 12 is provided as one or more boss structures, and correspondingly, the hub 21 is provided with a matching groove or notch structure. Conversely, the positioning portion 12 is configured as one or more grooves or notches, and correspondingly, the hub 21 is configured with a matching boss structure. The positioning part 12 is in plug fit with the hub 21, so that the assembly efficiency is high and the positioning accuracy is high. The top cover 10 can be positioned and assembled to along a preset track

As shown in fig. 3 and 4, in an alternative embodiment, the positioning portion 12 includes at least one positioning groove formed by recessing from the surface. The positioning groove is formed in the assembling portion 13 of the top cover 10, and accordingly, the fan body 20 includes a limiting portion 23 formed on the hub 21, and the limiting portion 23 is a positioning boss formed on the positioning groove. The top cap 10 covers the end of the hub 21, and the positioning boss is inserted into the positioning groove, so that the top cap 10 is connected with the hub 21 in a positioning manner, and the connecting effect is good.

In another alternative embodiment, the positioning portion 12 includes at least one positioning rib protruding from the end wall of the top cover. The protruding assembly portion 13 of locating top cap 10 of protruding locating rib, correspondingly, fan body 20 is including locating the spacing portion 23 of wheel hub 21, and this spacing portion 23 is established to be in locating rib assorted location slot. The top cap 10 covers the end of the hub 21, and the positioning convex ribs are inserted into the positioning slots, so that the top cap 10 is connected with the hub 21 in a positioning mode, and the connecting effect is good.

As shown in fig. 4 and 5, in one embodiment, the height of the top cover 10 protruding from the surface of the hub 21 is set to h, and the maximum radius of gyration of the fan main body 20 is set to d, where 3⁰≤arctan(h/d)≤10⁰. The top cover 10 is detachably fitted to the end of the hub 21 with a maximum height h of its end surface protruding from the hub 21. Alternatively, the maximum height of the top cover 10 is located at the intersection of the guide portion 11 and the end surface of the top cover 10. Alternatively, the end face of the top cover 10 is set to be a plane, and the height of the top cover 10 protruding out of the surface of the hub 21 is the distance between the end face of the hub 21 and the end face of the top cover 10And (5) separating.

The fan main body 20 is driven by the power equipment to rotate around a rotation center line, and the maximum rotation radius of the fan main body 20 is set as d. Optionally, one end of the fan blade set 22 is flush with the end surface of the hub 21, that is, part of the edges of the fan blades in the fan blade set 22 are flush with the hub 21, wherein part of the edges of the fan blades are arc-shaped.

The height of the top cover 10 protruding out of the surface of the hub 21 is set as h, the maximum turning radius of the fan body 20 is set as d, two right-angled sides of a right triangle are set, and an acute angle corresponding to the height of the top cover 10 protruding out of the surface of the hub 21 is set as a, wherein a is arctan (h/d). Alternatively, the angle of a may be set to 3 degrees, 5 degrees, 6 degrees, 8 degrees, 10 degrees, etc. to improve the wind guiding effect and reduce the noise.

As shown in fig. 4 and 6, the top cover 10 is detachably connected to the fan main body 20, in an embodiment, the fan main body 20 includes a locking portion 24 disposed on the hub 21, and the top cover 10 is clamped to the limiting portion 23 and locked to the locking portion 24. The fan main body 20 is positioned by the stopper 23 in cooperation with the positioning part 12 of the top cover 10 so that the locking part 24 corresponds to the connection part of the top cover 10. For example, the locking portions 24 are a plurality of screw holes provided in the hub 21, and the top cover 10 is provided with corresponding through holes. The fastening member passes through the through hole and is locked to the screw hole, so that the top cover 10 is locked to the fan main body 20, and the locking effect is good.

In an alternative embodiment, the hub 21 includes a tubular main body part 212, a rotating shaft part 211 for connecting the power equipment, and a spoke part 213 for connecting the main body part 212 and the rotating shaft part 211, wherein the spoke part 213 is provided with water leakage spaces 214 distributed at intervals. The top cover 10 covers the end of the main body 212 to prevent the two ends of the main body 212 from communicating with each other through the water leakage space 214, so that the noise reduction effect is good. The top cover 10 covers the end of the body 212 and prevents rainwater from dropping. The spoke portion 213 can flexibly adjust the structure and the stress condition, and the structure is less limited.

As shown in fig. 1 and 7, the axial flow fan disclosed in the above embodiment is applied to an outdoor unit of an air conditioner to reduce operation noise of the outdoor unit of the air conditioner and increase an air output of the outdoor unit of the air conditioner, and has a good heat dissipation effect. In one embodiment, the outdoor unit of an air conditioner includes a unit body 30, a power motor 40 installed to the unit body 30, and an axial flow fan as disclosed in the above embodiments, which is mounted to an output shaft of the power motor 40.

The axial flow fan controls airflow to flow under the driving of the power motor 40, and under the condition of the same wind power, the power required by the power motor 40 is reduced, and the noise is reduced. Optionally, the axial flow fan is applied to an outdoor unit of an up-blowing air conditioner, the top cover 10 is located in an axial direction of the axial flow fan and deviates from a gravity direction, so that rainwater is blocked by the top cover 10 and cannot fall into the hub 21, and the structural design of the hub 21 is flexible. It is worth mentioning that the outdoor unit of the air conditioner can be applied to an air conditioning system for controlling heat exchange of the air conditioning system.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The axial flow fan is applied to an outdoor unit of an air conditioner and is characterized by comprising a fan main body and a top cover, wherein the fan main body comprises a hub and a fan blade group arranged on the peripheral wall of the hub, and the top cover is detachably connected to the hub and seals the end part of the hub.

2. The axial fan as claimed in claim 1, wherein the fan body is rotated by an external force and drives the air to flow toward the top cover, and the outer circumferential wall of the top cover is partially contracted for guiding a part of the air to flow.

3. The axial fan as claimed in claim 2, wherein the top cover includes a guide portion for guiding the flow of the gas, the guide portion having a cross-sectional area gradually decreasing from one end to the other end.

4. The axial fan as claimed in claim 3, wherein a line connecting a midpoint of the hub in a direction of a gyration center line and a minimum gyration radius of the guide portion forms an angle β with respect to the gyration center line of the hub, and a line connecting a midpoint of the hub in a direction of a gyration center line and a maximum gyration radius of the guide portion forms an angle γ with respect to the gyration center line of the hub, wherein 0.5 ≦ β/γ ≦ 0.7.

5. The axial fan of claim 1, wherein the top cover is positioned to be coupled to the fan body and lockingly coupled to the hub by fasteners.

6. The axial flow fan according to claim 5, wherein the top cover is provided with a positioning portion, the top cover is provided with the hub, and the positioning portion is connected with the hub in an inserted manner.

7. The axial fan according to claim 6, wherein the positioning part includes at least one positioning groove formed recessed from a surface; or, the positioning part comprises at least one positioning convex rib convexly arranged on the end wall of the top cover.

8. The axial fan in accordance with claim 1, wherein the height of the protrusion of the top cover from the hub surface is set to h, and the maximum radius of gyration of the fan body is set to d, where 3^O≤arctan(h/d)≤10^O。

9. The axial fan according to claim 1, wherein the fan main body includes a locking portion and a stopper portion provided to the hub, and the top cover is engaged with the stopper portion and locked to the locking portion.

10. An outdoor unit of an air conditioner, comprising a unit main body, a power motor installed to the unit main body, and the axial flow fan according to any one of claims 1 to 9, the axial flow fan being mounted to an output shaft of the power motor.