# US 2021/0277913 A1 · Blower

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- Number: US 2021/0277913 A1
- Document ID: US20210277913A1
- Status: Published application
- Kind: A1
- Application number: 17/190,692
- Filed: 2021-03-03
- Published: 2021-09-09
- Earliest claimed: 2020-03-04
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jaehyun Kim; Yongmin Kim; Kidong Kim; Seokho Choi; Hyungho Park; Hoojin Kim; Chiyoung Choi
- Web page: https://patentgrep.com/patent/US20210277913A1

## CPC

- F04D 29/441: {especially adapted for elastic fluid pumps}
- F04D 25/14: and having shutters, e.g. automatically closed when not in use
- F04D 27/002: {by varying geometry within the pumps, e.g. by adjusting vanes}
- F04D 29/002: {especially adapted for elastic fluid pumps}
- F04D 29/26: Rotors specially for elastic fluids
- F04D 29/403: {especially adapted for elastic fluid pumps}
- F04F 5/16: displacing elastic fluids
- F04F 5/44: Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F 5/50: of compressing pumps
- F04D 25/08: the working fluid being air, e.g. for ventilation
- F04D 29/464: {adjusting flow cross-section, otherwise than by using adjustable stator blades}
- F04F 5/461: {Adjustable nozzles}
- F05D 2250/52: Outlet
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F04F: PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED {(evacuating by sorption F04B)}; SIPHONS {(conveying materials in bulk by flows of gas, liquid of foam B65G53/00)}
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A blower is provided that may include a fan that creates airflow; a lower body forming an inner space in which the fan may be installed, and having at least one suction hole through which air passes; an upper body positioned above the lower body and including a first upper body forming a first inner space that communicates with the inner space of the lower body, and a second upper body forming a second inner space that communicates with the inner space of the lower body and spaced apart from the first upper body; a space formed between the first upper body and the second upper body and opened in a frontward-rearward direction; a first opening formed through a first boundary surface of the first upper body facing the space; a second opening formed through a second boundary surface of the second upper body facing the space; and a door assembly including a first door installed at the first upper body and that opens and closes the first opening, and a second door installed at the second upper body and that opens and closes the second opening.

## Claims

### Claim 1

A blower, comprising:
a fan that creates airflow;
a lower body forming an inner space in which the fan is installed, and having at least one suction hole through which air passes;
an upper body positioned above the lower body and including a first upper body forming a first inner space that communicates with the inner space of the lower body, and a second upper body forming a second inner space that communicates with the inner space of the lower body and spaced apart from the first upper body;
a space formed between the first upper body and the second upper body and opened in a frontward-rearward direction;
a first opening formed through a first boundary surface of the first upper body facing the space;
a second opening formed through a second boundary surface of the second upper body facing the space; and
a door assembly including a first door installed at the first upper body and that opens and closes the first opening, and a second door installed at the second upper body and that opens and closes the second opening.

### Claim 2 (depends on 1)

The blower according to claim 1, wherein the first door comprises a plurality of first doors sequentially disposed at the first opening in a widthwise direction of the first opening, wherein the first opening is divided into a plurality of first regions, each of which is opened or closed corresponding to each of the plurality of first doors, wherein the second door comprises a plurality of second doors sequentially disposed at the second opening in a widthwise direction of the second opening, and wherein the second opening is divided into a plurality of second regions, each of which is opened or closed corresponding to each of the plurality of second doors.

### Claim 3 (depends on 2)

The blower according to claim 2, wherein the first upper body is spaced from the second upper body in a lateral direction, wherein the first opening and the second opening are symmetrical in the lateral direction, and wherein the door assembly comprises:
a first door assembly including the plurality of first doors; and
a second door assembly including the plurality of second doors.

### Claim 4 (depends on 3)

The blower according to claim 3, wherein the first door assembly and the second door assembly are symmetrical in the lateral direction.

### Claim 5 (depends on 3)

The blower according to claim 3, wherein each of the first door assembly and the second door assembly further comprises:
a door motor that provides a rotational force;
a drive pinion fixed to a rotational shaft of the door motor;
a moving rack that extends lengthwise and is engaged with the drive pinion; and
a plurality of gears engaged with the moving rack, wherein each of the plurality of gears of the first door assembly provides a rotational shaft of each of the plurality of first doors, and wherein each of the plurality of gears of the second door assembly provides a rotational shaft of each of the plurality of second doors.

### Claim 6 (depends on 5)

The blower according to claim 5, wherein the moving rack is disposed between the plurality of gears and the drive pinion, and engaged with the plurality of gears and the drive pinion.

### Claim 7 (depends on 6)

The blower according to claim 6, wherein the moving rack further comprises:
a first long side extending in a longitudinal direction of the moving rack, and facing the drive pinion;
a second long side opposite to the first long side, and facing the plurality of gears;
a sliding gear formed at the first long side, and engaged with the drive pinion; and
a plurality of rack gears formed at the second long side, spaced apart from each other in the longitudinal direction of the moving rack, and engaged with the plurality of gears.

### Claim 8 (depends on 7)

The blower according to claim 7, wherein a length of the sliding gear is larger than a gap between rotational shafts of the plurality of gears, but smaller than a gap between the rotational shafts of the plurality of gears that are not adjacent to each other but are spaced apart from each other.

### Claim 9 (depends on 8)

The blower according to claim 8, wherein the plurality of rack gears is matched to the plurality of gears, respectively, wherein a length of a first rack gear, which is any one of the plurality of rack gears is a length of an arc of a central angle with respect to a radius of a first gear, which is any one of the plurality of gears, and wherein the first gear is matched to the first rack gear.

### Claim 10 (depends on 5)

The blower according to claim 5, wherein the first door assembly further comprises a mount installed at the first inner space, positioned under the door motor and supporting the door motor, and wherein the moving rack of the first door assembly is coupled to an upper surface of the mount to be movable in a longitudinal direction of the moving rack.

### Claim 11 (depends on 10)

The blower according to claim 10, wherein the moving rack of the first door assembly further comprises a guide slot formed through the moving rack in a vertical direction and extending lengthwise in the longitudinal direction of the moving rack, and wherein the mount of the first door assembly further comprises a boss that protrudes upward from the upper surface of the mount and inserted into the guide slot.

### Claim 12 (depends on 5)

The blower according to claim 5, wherein the first door assembly further comprises a plurality of upper shafts, the plural of upper shafts protruding upward from an upper end of the plurality of first doors, respectively, and fixed to the plurality of gears, respectively, and wherein the plurality of upper shafts is spaced apart from each other in a longitudinal direction of the moving rack and rotatably coupled to the first upper body.

### Claim 13 (depends on 12)

The blower according to claim 12, wherein the first door assembly further comprises a plurality of lower shafts, the plurality of lower shafts protruding downward from a lower end of the plurality of first doors, respectively, and rotatably coupled to the first upper body, respectively, and wherein the plurality of lower shafts is aligned with the plurality of upper shafts in a vertical direction.

### Claim 14 (depends on 2)

The blower according to claim 2, wherein the first upper body is spaced from the second upper body in a first lateral direction, wherein the first boundary surface is convex in a second lateral direction, wherein the second boundary surface is convex in the first lateral direction, and wherein a gap between the first boundary surface and the second boundary surface decreases from a rear of the space to a center of the space and increases from the center of the space to a front of the space.

### Claim 15 (depends on 14)

The blower according to claim 14, wherein the plurality of first doors is disposed symmetrically with respect to a center of the first boundary surface in the frontward-rearward direction.

### Claim 16 (depends on 2)

The blower according to claim 2, wherein when the first opening is closed, the plurality of first doors is disposed parallel to the first boundary surface, and wherein when the first opening is open, the plurality of first doors crosses the first boundary surface.

### Claim 17 (depends on 16)

The blower according to claim 16, wherein when the first opening and the second opening are open, the plurality of first doors and the plurality of second doors are in contact with or adjacent to each other.

### Claim 18 (depends on 2)

The blower according to claim 2, wherein the door assembly further comprises a door motor that supplies power to the plurality of first doors and the plurality of second doors, and wherein the blower further comprises a controller that controls operation of the door motor to open and close the plurality of first regions and the plurality of second regions.

### Claim 19 (depends on 18)

The blower according to claim 18, wherein the controller sequentially opens and closes the plurality of first regions through the plurality of first doors, or sequentially opens and closes the plurality of second regions through the plurality of second doors.

### Claim 20 (depends on 19)

The blower according to claim 19, wherein the plurality of first doors is disposed sequentially in the frontward-rearward direction, and are rotatable about a rotational shaft parallel to a vertical direction, wherein the plurality of second doors is disposed sequentially in the frontward-rearward direction, and is rotatable about a rotational shaft parallel to the vertical direction, and wherein the controller sequentially rotates the plurality of first doors and the plurality of second doors in the frontward-rearward direction.