# US 8,540,497 B2 · Fan self-cooling structure with heat pipe

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- Number: US 8,540,497 B2
- Document ID: US8540497B2
- Status: Granted
- Kind: B2
- Application number: 12/855,950
- Filed: 2010-08-13
- Published: 2012-02-16
- Granted: 2013-09-24
- Earliest claimed: 2010-08-13
- Assignees: Asia Vital Components Co., Ltd.
- Applicants: Shu-Kang Chang
- Inventors: Shu-Kang Chang
- Web page: https://patentgrep.com/patent/US8540497B2

## CPC

- F04D 25/0633: {Details of the magnetic circuit}
- F04D 25/0646: {Details of the stator}
- F04D 25/082: {the unit having provision for cooling the motor}
- F04D 29/5806: {Cooling the drive system}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A fan self-cooling structure with heat pipe includes a stator assembly, a fan circuit board, and at least one heat pipe. The fan circuit board is flatly connected to a bottom end of the stator assembly and has at least one heat-producing electronic element provided thereon. The at least one heat pipe is provided on the fan circuit board for absorbing and transferring heat energy produced by the at least one electronic element. With these arrangements, it is able to lower the temperature of the electronic elements in a fan and enhance the characteristics of the fan.

## Claims

### Claim 1

A fan self-cooling structure with a heat pipe feature, comprising:
a stator assembly;
a fan circuit board being connected to a bottom end of the stator assembly and having at least one heat-producing electronic element provided thereon;
at least one heat pipe being provided on a bottom side of the fan circuit board, oriented in a radial direction and dedicated to absorbing and transferring heat energy produced by the at least one electronic element;
wherein the fan self-cooling structure is assembled to a fan framework; wherein the fan framework includes an outer frame and a base; the base defining a central first recess therein, the first recess corresponding to the fan circuit board connected to said stator assembly for connecting with one side of the fan circuit board; and
wherein the first recess is provided therein with at least one second recess corresponding to and for receiving the at least one heat pipe.

### Claim 2 (depends on 1)

The fan self-cooling structure with a heat pipe feature as claimed in claim 1, wherein the heat pipe has a heat-absorbing section and a heat-dissipating section; the heat-absorbing section being in contact with the heat-producing electronic element for transferring the heat energy produced by the electronic element to the heat-dissipating section, so that the heat energy is dissipated from the heat-dissipating section into ambient air.

### Claim 3 (depends on 1)

The fan self-cooling structure with a heat pipe feature as claimed in claim 1, wherein the stator assembly includes a silicon steel seat, from which a plurality of insulating posts is radially outward extended.

### Claim 4 (depends on 3)

The fan self-cooling structure with a heat pipe feature as claimed in claim 3, wherein the insulating posts each have a coil wound therearound.

### Claim 5 (depends on 4)

The fan self-cooling structure with a heat pipe feature as claimed in claim 4, wherein the coils are electrically connected to the fan circuit board.

### Claim 6 (depends on 1)

The fan self-cooling structure with a heat pipe feature as claimed in claim 1, wherein the at least one heat pipe has a distal end in contact with the outer frame of the fan framework, and the heat energy transferred by the heat pipe to the heat dissipating section is dissipated from the outer frame.

### Claim 7 (depends on 6)

The fan self-cooling structure with a heat pipe feature as claimed in claim 6, wherein the fan framework is a metal-made framework.