# US 2021/0277916 A1 · Fan module

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- Number: US 2021/0277916 A1
- Document ID: US20210277916A1
- Status: Published application
- Kind: A1
- Application number: 16/845,347
- Filed: 2020-04-10
- Published: 2021-09-09
- Earliest claimed: 2020-03-05
- Assignees: Champ Tech Optical (Foshan) Corporation
- Applicants: Champ Tech Optical (Foshan) Corporation
- Inventors: XIAO-GUANG MA; ZHENG LUO
- Web page: https://patentgrep.com/patent/US20210277916A1

## CPC

- F04D 29/646: {Mounting or removal of fans}
- F04D 19/007: {multistage fans}
- F04D 29/522: {especially adapted for elastic fluid pumps}
- F04D 29/601: {specially adapted for elastic fluid pumps}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A fan module includes a first fan frame and a second fan frame. A side surface of the first fan frame includes a number of latching posts and a number of positioning portions extending toward the second fan frame. A side surface of the second fan frame defines a number of latching grooves in one-to-one correspondence with the latching posts. The side surface of the second fan frame further defines a number of rotating grooves in one-to-one correspondence with the positioning portions. Engagement between the latching posts and the latching grooves restricts a tangential relative displacement between the first fan frame and the second fan frame. Engagement between the rotating grooves and the positioning portions restricts an axial displacement between the first fan frame and the second fan frame.

## Claims

### Claim 1

A fan module comprising:
a first fan frame; and
a second fan frame; wherein:
a side surface of the first fan frame comprises a plurality of latching posts and a plurality of positioning portions extending toward the second fan frame;
a side surface of the second fan frame defines a plurality of latching grooves in one-to-one correspondence with the plurality of latching posts;
the side surface of the second fan frame further defines a plurality of rotating grooves in one-to-one correspondence with the plurality of positioning portions;
engagement between the latching posts and the latching grooves restricts a tangential relative displacement between the first fan frame and the second fan frame; and
engagement between the rotating grooves and the positioning portions restricts an axial displacement between the first fan frame and the second fan frame.

### Claim 2 (depends on 1)

The fan module of claim 1, wherein:
each of the plurality of latching grooves is in communication with one corresponding rotating groove;
each of the plurality of latching grooves extends in a direction parallel to a central axis of the second fan frame; and
each of the plurality of rotating grooves extends in a direction perpendicular to the plurality of latching grooves.

### Claim 3 (depends on 2)

The fan module of claim 2, wherein:
each of the plurality of rotating grooves is bound by a short wall, a long wall, and a side wall;
the short wall is opposite the long wall;
the side wall is coupled between the short wall and the long wall;
the side wall is parallel to the central axis of the second fan frame;
an end of the rotating groove opposite the side wall defines an open end; and
the long wall is longer than the short wall.

### Claim 4 (depends on 3)

The fan module of claim 3, wherein:
when the latching post is received in the latching groove, the positioning portion abuts against the side wall of the rotating groove.

### Claim 5 (depends on 4)

The fan module of claim 4, wherein:
a sloped surface is located adjacent to the latching groove on a side of the latching groove away from the side wall; and
the sloped surface is gradually recessed in a direction away from the latching groove.

### Claim 6 (depends on 5)

The fan module of claim 5, wherein:
the latching post and the latching groove are semicircular in shape.

### Claim 7 (depends on 6)

The fan module of claim 6, wherein:
the side surface of the first fan frame and the side surface of the second fan frame are provided with surface markers for indicating a rotation direction of assembly of the first fan frame and the second fan frame and an axial wind direction through the first fan frame and the second fan frame.

### Claim 8 (depends on 7)

The fan module of claim 7, wherein:
an opening for receiving a fan is defined in a side of the first fan frame facing away from the second fan frame; and
an opening for receiving another fan is defined in a side of the second fan frame facing away from the first fan frame.

### Claim 9 (depends on 8)

The fan module of claim 8, wherein:
the side of the first fan frame defining the opening and the side of the second fan frame defining the opening each define a wiring groove.

### Claim 10

A fan module comprising:
a circumferential side surface configured to receive a fan;
a plurality of latching members extending from a first end portion of the side surface; and
a plurality of rotating grooves and a plurality of latching grooves are defined in a second end portion of the side surface; wherein:
each of the plurality of latching members comprises a positioning portion and a latching post;
the plurality of rotating grooves is defined in one-to-one correspondence with a plurality of the positioning portions;
the plurality of latching grooves is defined in one-to-one correspondence with a plurality of the latching posts;
the plurality of rotating grooves is configured to receive the plurality of the positioning portions of a second fan module for restricting an axial displacement between the fan module and the second fan module; and
the plurality of latching grooves is configured to receive the plurality of the latching posts of the second fan module for restricting a tangential relative displacement between the fan module and the second fan module.

### Claim 11 (depends on 10)

The fan module of claim 10, wherein:
each of the plurality of latching grooves is in communication with one corresponding rotating groove;
each of the plurality of latching grooves extends in a direction parallel to a central axis of the fan module; and
each of the plurality of rotating grooves extends in a direction perpendicular to the plurality of latching grooves.

### Claim 12 (depends on 11)

The fan module of claim 11, wherein:
each of the plurality of rotating grooves is bound by a short wall, a long wall, and a side wall;
the short wall is opposite the long wall;
the side wall is coupled between the short wall and the long wall;
the side wall is parallel to the central axis of the fan module;
an end of the rotating groove opposite the side wall defines an open end; and
the long wall is longer than the short wall.

### Claim 13 (depends on 12)

The fan module of claim 12, wherein:
when the latching post is received in the latching groove, the positioning portion abuts against the side wall of the rotating groove.

### Claim 14 (depends on 13)

The fan module of claim 13, wherein:
a sloped surface is located adjacent to the latching groove on a side of the latching groove away from the side wall; and
the sloped surface is gradually recessed in a direction away from the latching groove.

### Claim 15 (depends on 14)

The fan module of claim 14, wherein:
the latching post and the latching groove are semicircular in shape.