# US 2021/0277914 A1 · Oblique flow booster fan

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- Number: US 2021/0277914 A1
- Document ID: US20210277914A1
- Status: Published application
- Kind: A1
- Application number: 17/005,698
- Filed: 2020-08-28
- Published: 2021-09-09
- Earliest claimed: 2020-03-09
- Assignees: Foshan Samyoo Electronic Co., Ltd.
- Applicants: Foshan Samyoo Electronic Co., Ltd.
- Inventors: Yucheng Lu; Shengcheng Lu
- Web page: https://patentgrep.com/patent/US20210277914A1

## CPC

- F04D 17/06: Helico-centrifugal pumps
- F04D 29/522: {especially adapted for elastic fluid pumps}
- F04D 19/002: {Axial flow fans}
- F04D 29/4253: {with axial entry and discharge}
- F04D 29/444: {Bladed diffusers}
- F04D 29/626: {Mounting or removal of fans}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

An oblique flow booster fan includes an impeller having an impeller body and a plurality of blades, each blade spirally extended from top to bottom, two ends of each blade provided an upper edge and a lower edge respectively, and the upper edge having a width larger than the lower edge; an air guide assembly including an outer ring, an inner cylinder spaced apart in the outer ring, and air guide vanes evenly connected between the outer ring and the inner cylinder; a motor installed in the inner cylinder and having a rotating shaft connected to the impeller body; and a pressurization volute casing arranged outside the impeller and connected to the outer ring, one end of the pressurization volute casing provided with an air inlet, and another end of the outer ring provided with an air outlet. The fan is high wind pressure and low noise.

## Claims

### Claim 1

An oblique flow booster fan, comprising:
an impeller, comprising an impeller body and a plurality of blades connected to the impeller body, each of the blades spirally extended from a top of the impeller body to a bottom of the impeller body, two ends of each of the blades being provided an upper edge and a lower edge respectively, and the upper edge having a width larger than the lower edge;
an air guide assembly, comprising an outer ring, an inner cylinder spaced apart in the outer ring, and a plurality of air guide vanes evenly connected between the outer ring and the inner cylinder;
a motor, installed in the inner cylinder and having a rotating shaft connected to the impeller body; and
a pressurization volute casing, arranged outside the impeller and connected to the outer ring, one end of the pressurization volute casing being provided with an air inlet, and another end of the outer ring being provided with an air outlet.

### Claim 2 (depends on 1)

The oblique flow booster fan according to claim 1, wherein the impeller body is upward extended to form the upper edge that is spiral.

### Claim 3 (depends on 1)

The oblique flow booster fan according to claim 1, wherein the impeller has an odd number of the blades.

### Claim 4 (depends on 1)

The oblique flow booster fan according to claim 1, further comprising a connecting base fixed at a top of the inner cylinder, the rotating shaft of the motor is protruded from the connecting base and connected to the impeller body.

### Claim 5 (depends on 1)

The oblique flow booster fan according to claim 1, wherein a holder is provided inside the inner cylinder for installing the motor.

### Claim 6 (depends on 1)

The oblique flow booster fan according to claim 1, wherein the inner cylinder is a frustum shape, and an outer diameter of a top of the inner cylinder is larger than that of a bottom of the inner cylinder, the inner cylinder is higher than the outer ring in an axial direction of the rotating shaft, and each of the air guide vanes are higher than the outer ring in the axial direction of the rotating shaft.

### Claim 7 (depends on 1)

The oblique flow booster fan according to claim 1, wherein each of the air guide vanes has a top side and a bottom side oppositely arranged, the top side is connected to the top of the inner cylinder and located above the outer ring, the bottom side is respectively connected to the inner cylinder and the outer ring, and the top side and the bottom side are bent toward each other in an axial direction of the rotating shaft to make each of the air guide vanes have an arc structure.

### Claim 8 (depends on 1)

The oblique flow booster fan according to claim 1, wherein the pressurization volute casing has a neck that is recessed inward, and an inner wall of the neck is spaced from the blades.

### Claim 9 (depends on 1)

The oblique flow booster fan according to claim 1, wherein the outer ring and the bottom edge of the pressurization volute casing are provided with protrusions and grooves matching with each other, and the protrusions are protruded along a radial direction of the outer ring.

### Claim 10 (depends on 1)

The oblique flow booster fan according to claim 1, wherein the pressurization volute casing comprises a first casing and a second casing that are matched with each other, a first fixing part, a second fixing part, an engaging buckle, and a matching block are provided between the first and the second casings, the engaging buckle and the matching block are detachably engaged with each other, the first fixing part and the second fixing part are detachably connected together by a connector.