# US 12,000,408 B2 · Fairing and fan device

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- Number: US 12,000,408 B2
- Document ID: US12000408B2
- Status: Granted
- Kind: B2
- Application number: 18/170,018
- Filed: 2023-02-16
- Published: 2023-09-07
- Granted: 2024-06-04
- Earliest claimed: 2022-03-03
- Assignees: Sungrow Power Supply Co., Ltd.
- Applicants: Sungrow Power Supply Co., Ltd.
- Inventors: Qi Yao; Jie Zhou; Xin Yang
- Web page: https://patentgrep.com/patent/US12000408B2

## CPC

- F04D 29/522: {especially adapted for elastic fluid pumps}
- F04D 29/703: {specially for fans, e.g. fan guards}
- F04D 19/002: {Axial flow fans}
- F04D 29/541: {Specially adapted for elastic fluid pumps (F04D29/56 takes precedence)}
- F04D 29/542: {Bladed diffusers (fixing blades to stators F01D9/042)}
- F04D 29/667: {by influencing the flow pattern, e.g. suppression of turbulence}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A fairing and a fan device are provided according to the present disclosure. The fairing includes a fairing body which is arranged at a fan air vent, the fairing body has a fairing area, which is annular and is located at a periphery of a geometric center of the fairing body, and the fairing area is provided with a fairing through hole. In the fairing according to the present disclosure, the fairing body has the fairing area, the fairing area is provided with the fairing through hole, and the fairing body is configured to arranged at the fan air vent, so that the airflow is faired through the fairing through hole, the fairing area is annular and is located at the periphery of the geometric center of the fairing body, so that the fairing body has no fairing through hole at its geometric center.

## Claims

### Claim 1

A fairing, comprising a fairing body which is arranged at an air vent of a fan, wherein an axis of the fairing body is collinear with an axis of the fan rotation shaft of the fan, wherein the fairing body has a fairing area, the fairing area is annular and is located at a periphery of a geometric center of the fairing body perpendicular to the axis of the fan rotation shaft, and the fairing area is provided with a plurality of fairing through holes,
wherein the fairing body is provided with a non-fairing area at an inner side of an inner ring of the fairing area perpendicular to the axis of the fan rotation shaft, and the non-fairing area is provided with a material saving structure,
wherein the material saving structure is a material saving through hole, an area of the material saving through hole is larger than each of the plurality of fairing through holes and a hole wall of the material saving through hole coincides with the inner ring of the fairing area,
wherein, along the axis of the fan rotation shaft, an inner side surface, close to the fan, of the non-fairing area is flush with an inner side surface of the fairing body, and an outer side surface, away from the fan, of the non-fairing area is flush with an outer side surface of the fairing body,
wherein, if an outer ring of the fairing area is in shape of circle, R≥R0;
if the outer ring of the fairing area is in shape of polygon, L≥R0;
wherein R is a radius of the outer ring of the fairing area, R0 is an inner diameter of a fan duct, and L is a minimum distance between a side of the polygon and a geometric center of the polygon.

### Claim 2 (depends on 1)

The fairing according to claim 1, wherein an inner ring of the fairing area is a circle, and an outer ring of the fairing area is in shape of circle or polygon.

### Claim 3 (depends on 1)

The fairing according to claim 1, wherein the fairing body is provided with a non-fairing area at an inner side of an inner ring of the fairing area, a projection of the non-fairing area on a projection plane completely falls on an end surface of a fan rotation shaft, and the projection plane is coplanar with the end surface of the fan rotation shaft.

### Claim 4 (depends on 3)

The fairing according to claim 3, wherein the inner ring of the fairing area is in shape of circle, and 0<r≤r0; wherein r is a radius of the inner ring of the fairing area, and r0 is a radius of the fan rotation shaft.

### Claim 5

The fairing according to 1, wherein,
a projection of the fairing area on a projection plane and a projection of a fan duct on the projection plane have an overlapping portion, and the projection plane is perpendicular to an axis of the fan duct;
and, an outer ring of the fairing area is not extended beyond a fan housing of a fan.

### Claim 6 (depends on 1)

The fairing according to claim 1, wherein each of the plurality of fairing through holes is in shape of circle or regular polygon.

### Claim 7

The fairing according to 1, wherein,
if the plurality of fairing through holes are in shape of circle, 1 mm≤R1≤20 mm, 0.01 mm≤h≤0.5 mm, and 2 mm≤D≤50 mm;
or if the plurality of fairing through holes are in regular polygon, 1 mm≤L1≤20 mm, 0.01 mm≤h≤0.5 mm, and 2 mm≤D≤50 mm;
wherein R1 is a radius of each of the plurality of fairing through holes, L1 is a side length of the regular polygon, h is a minimum distance between two adjacent fairing through holes, and D is a thickness of the fairing area.

### Claim 8

The fairing according to 1, wherein,
mounting holes, which are configured to mount the fairing body on the fan, are provided at an edge of the fairing body;
and the fairing body is in shape of quadrate;
and edge of the fairing body is flush with an edge of a fan housing.

### Claim 9 (depends on 1)

The fairing according to claim 1, wherein the air vent of the fan is an air inlet of the fan or an air outlet of the fan.

### Claim 10 (depends on 1)

A fan device, comprising a fan, and the fairing according to claim 1.

### Claim 11 (depends on 10)

The fan device according to claim 10, wherein two air vents of the fan are provided, which are an air inlet of the fan and an air outlet of the fan, and the fairing body arranged at the air inlet of the fan is the same as or different from the fairing body arranged at the air outlet of the fan.

### Claim 12 (depends on 10)

The fan device according to claim 10, wherein
the fairing body is detachably fixed to a fan housing of the fan;
and, the fan is an axial-flow fan.