TWM537236U - Heat dissipation device and projection device using the same - Google Patents

Description

Heat sink and projection device using the same

The present invention relates to the technical field of optical projection devices, and in particular to a heat dissipation device and a projection device using the same.

The color wheel laser light source is widely used in the fields of illumination, projection, optical illumination, optical storage and the like. In these applications, the light source needs to be converted into light of different colors through the color wheel, and when the light source is irradiated to the color wheel wheel, part of the light energy is converted into heat energy, which causes a sharp rise in temperature. The commonly used color wheel cooling technology is not ideal in solving the problem of higher and higher light energy. For example, when the power of the spot is large, the internal device temperature will exceed the specified temperature, resulting in the color wheel not working normally for a long time.

In the prior art, the color wheel is mainly cooled by the air blow, and the heat dissipation effect is general. Specifically, as shown in FIG. 1, the color wheel device includes a housing 101, a motor 102, a holder 103, a color wheel 104, and a cover plate 105. The heat of the color wheel 104 is mainly transmitted to the outer casing 101 and the cover plate 105 through the internal air convection heat transfer and the heat conduction between the color wheel 104, the fixed frame 103 and the motor 102, wherein the casing 101 occupies the main part and the system is re-transmitted. The forced convection between the air volume and the housing 101 carries away the heat.

In view of the above, due to the space limitation, the heat dissipation area of the casing 101 and the cover plate 105 is limited, and the heat carried away by the convection with the system air volume is limited. When the high brightness and the color wheel generate a large amount of heat, the heat of the color wheel 104 cannot be taken away in time. The accumulated heat can only be conducted to the casing of the motor 102, causing the temperature of the casing of the motor 102 to rise, which will reduce the normal working life of the motor 102. The heat dissipation problem of the color wheel is not effectively solved, and its efficiency and life are also reduced.

The present application provides a heat dissipating device suitable for a complicated structure and having a good heat dissipation effect, and a projection device to which the heat dissipating device is applied.

In one aspect, an embodiment provides a heat sink comprising: a heat pipe embedded in a heat sink member, a heat sink device being a heat generating device or a device in direct contact with the heat generating device; and a heat exchange device mounted on the heat sink On the heat sink member, at least a portion of the heat pipe is in contact with the heat exchange device; the heat exchange device is provided with a refrigerant liquid inlet and a refrigerant liquid outlet, and a flow channel is further disposed therein, and the refrigerant liquid inlet and the refrigerant liquid outlet are communicated through the flow channel.

In another aspect, another embodiment provides a projection apparatus using the heat sink, including an excitation light generating device, a laser light generating device, and a housing, the excitation light generating device for emitting excitation light, and the laser generating device is used by Producing excited light under irradiation of the excitation light generating device, the laser generating device is mounted in the casing, and further comprising a heat dissipating device, the heat dissipating device comprising: a heat pipe embedded in the casing; and a heat exchange device mounted on the casing The heat pipe is at least partially in contact with the heat exchange device; the heat exchange device is provided with a refrigerant liquid inlet and a refrigerant liquid outlet, and a flow channel is further disposed therein, and the refrigerant liquid inlet and the refrigerant liquid outlet are communicated through the flow channel.

According to the projection apparatus of the above embodiment and the heat dissipating device suitable for the complicated structure, the heat dissipating device is mounted with the heat pipe on the heat sink member, and the heat exchange device having the flow path is installed, so that the heat of the heat sink member can be collected by the heat pipe. The heat pipe is in contact with the heat exchange device, and the heat can be transferred to the heat exchange device, and the heat exchange device can carry away the heat through the refrigerant liquid or the refrigerant gas introduced by the cycle, thereby rapidly reducing the temperature of the heat sink member, and the heat pipe can be bent, It can meet the installation of different complex structures and can be extended to different locations to facilitate the comprehensive collection of heat, thus improving efficiency and extending service life.

In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

In the present embodiment, a projection apparatus and a heat dissipating device are provided. The heat dissipating device can be used for heat dissipation of a heat sink member having a complicated structure, and the heat sink member can be a heat generating device or a device directly contacting the heat generating device. In this embodiment, the heat sink is mounted on the projection device, and the heat sink can be mounted on the mobile phone, the computer, or the like to achieve heat dissipation.

The projection device comprises an excitation light generating device, a laser generating device, a housing and a heat dissipating device. The excitation light generating device is a light source for emitting excitation light, the laser generating device is a color wheel, and the color wheel is generated by the excitation light generating device. Excited light of a specific color. The color wheel is mounted within the housing. The housing has an irregular structure and the surface has a large number of mounting holes. The heat sink is mounted on the housing.

Specifically, as shown in FIG. 2, the heat sink includes a heat pipe 201 and a heat exchange device 202. Wherein, the heat pipe 201 comprises three strips, and the heat pipe 201 is a phase change process (ie, utilizing latent heat of evaporation of the liquid and latent heat of condensation) by using a medium to condense at the cold end after evaporation at the hot end, so that the heat is quickly conducted.

Also, the heat pipe 201 is composed of a casing, a wick, and an end cap. The inside of the heat pipe 201 is evacuated to a negative pressure state and filled with a suitable liquid which has a low boiling point and is easily volatilized. The tube wall has a wick which is composed of a capillary porous material. One end of the heat pipe 201 is an evaporation end, and the other end is a condensation end. When one end of the heat pipe is heated, the liquid in the capillary tube is rapidly vaporized, the steam flows to the other end under the heat of heat diffusion, and the heat is condensed at the cold end to release heat, and the liquid is further porous. The material flows back to the evaporation end by capillary action, so that the circulation is not repeated until the temperature at both ends of the heat pipe is equal (when the heat diffusion of the steam stops).

The internal structure and principle of the heat pipe 201 are identical to those of the prior art heat pipe, except that the outer shape of the three heat pipes 201 is disposed according to the surface of the casing 203. The three heat pipes 201 are respectively embedded in the surface of the casing 203 and respectively bent from one end of the casing 203 to the other end, so that the three heat pipes 201 can extend as far as possible to the corners of the surface of the casing 203, so that the heat pipe 201 can be better. The heat of the housing 203 is quickly collected. In other embodiments, one or other number of curved heat pipes 201 are also included, and the heat pipe 201 can extend to the interior of the housing 203 to increase the ability of the heat pipe 201 to collect heat.

In the present embodiment, it is preferable that the refrigerant liquid is circulated and introduced into the heat exchange device 202 to achieve refrigeration. In other embodiments, the heat in the heat exchange device 202 can be removed by introducing the refrigerant gas.

The heat exchange device 202 includes a first housing 2021, a heat exchanger 2022, and a second housing 2023. The first housing 2021 is a plate-like structure, and the first housing 2021 is attached to one end of the surface of the housing 203 via a screw, covers the ends of the three heat pipes 201, and is in contact with the three heat pipes 201. The second housing 2023 is mounted on the first housing 2021, and is integrated with the first housing 2021 to form a cavity for the heat exchanger 2022. The second housing 2023 is provided with a refrigerant liquid inlet 2023-1 and a refrigerant outlet 2023. -2. The heat exchanger 2022 is consistent with the structure and principle of the prior art heat exchanger, and has a curved flow path. The heat exchanger 2022 is mounted on the first housing 2021 and accommodated in the first housing 2021 and the second housing 2023. The fluid chamber of the heat exchanger 2022 is in communication with the refrigerant liquid inlet 2023-1 and the refrigerant liquid outlet 2023-2 of the second casing 2023, and the refrigerant liquid can be introduced from the refrigerant liquid inlet 2023-1 through the flow. The passage is again discharged from the refrigerant outlet 2023-2.

In other embodiments, the heat exchange device 202 is a unitary structure, and the heat exchange device 202 is provided with a refrigerant liquid inlet and a refrigerant liquid outlet, and a curved flow channel is disposed therein, and a part of the flow channel is adjacent to the heat exchange device 202. Mounting surface for heat transfer.

The heat dissipation principle of the heat dissipating device for the complex structure provided by the embodiment is as follows: the heat on the casing 203 is collected through the three heat pipes 201 and transmitted to the first casing 2021, and the heat exchanger 2022 is transmitted through the first casing 2021. It absorbs heat and carries heat through the flowing refrigerant. The refrigerant is introduced through the external pump drive cycle. Since the heat pipe 201 has the characteristic of maintaining the overall temperature uniformity, when the temperature of the end contacting the first casing 2021 is sucked away, the temperature is lowered, and the temperature of other portions of the heat pipe 201 is transmitted to the lower temperature end, thereby causing the heat pipe 201 Heat is continuously absorbed from the color wheel housing and transmitted to the first housing 2021. The principle in which the color wheel conducts heat to the color wheel housing is the same as in the prior art, and is conducted through internal air convection and component connections.

The heat dissipating device of the present embodiment is suitable for a heat dissipating device of a complicated structure. Since three heat pipes 201 are embedded in the casing 203, a heat exchange device 202 having a flow path is also installed, so that heat on the casing 203 can be collected by the heat pipe 201, and the heat pipe is collected. 201 is in contact with the heat exchange device 202, and heat can be transferred to the heat exchange device 202. The heat exchange device 202 then carries away the heat through the flowing refrigerant liquid, so that the temperature of the color wheel housing 203 can be quickly lowered, and the heat pipe 201 can be bent. The installation meets the installation of different complex structures and can be extended to different locations for easy collection of heat.

The above description is only the embodiment of the present invention, and thus does not limit the scope of the patent of the present invention, and the equivalent structure or equivalent process transformation made by using the contents of the present specification and the drawings, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this creation.

101‧‧‧shell
102‧‧‧Motor
103‧‧‧Retaining frame
104‧‧‧Color wheel
105‧‧‧ Cover
201‧‧‧ heat pipe
202‧‧‧heat exchanger
203‧‧‧Shell
2021‧‧‧First housing
2022‧‧‧heat exchanger
2023‧‧‧ second housing
2023-1‧‧‧refrigerant inlet
2023-2‧‧‧refrigerant outlet

1 is a schematic structural view of a color wheel in the prior art; FIG. 2 is a schematic view showing an explosion structure of a heat sink device on a projection device in an embodiment.

201‧‧‧ heat pipe

202‧‧‧heat exchanger

203‧‧‧Shell

2021‧‧‧First housing

2022‧‧‧heat exchanger

2023‧‧‧ second housing

2023-1‧‧‧refrigerant inlet

2023-2‧‧‧refrigerant outlet

Claims (9)

A heat dissipating device comprising: a heat pipe mounted on a heat sink member, the heat sink device being a heat generating device or a device directly contacting the heat generating device; and a heat exchange device mounted on the heat sink member At least a portion of the heat pipe extends into contact with the heat exchange device; wherein the heat exchange device is provided with a refrigerant liquid inlet and a refrigerant liquid outlet, and the heat exchange device is further provided with a flow channel, the refrigerant liquid inlet And a refrigerant liquid outlet is communicated through the flow passage. The heat dissipation device of claim 1, wherein the heat exchange device comprises a first housing, a heat exchanger and a second housing; the first housing is fixed on a surface of the heat sink member, covering And contacting the end of the heat pipe; the second casing is fixed on the first casing, and the second casing and the first casing are combined to receive the cavity of the heat exchanger, The second casing is provided with a refrigerant liquid inlet and a refrigerant liquid outlet; the heat exchanger is mounted on the first casing and is accommodated in the cavity, and the heat exchanger is provided with a flow The passage is in communication with the refrigerant inlet and the refrigerant outlet of the second housing. The heat dissipating device according to claim 2, wherein the heat exchange device refrigerates by introducing a refrigerating liquid through a circulation. A projection apparatus comprising an excitation light generating device, a laser light generating device and a housing, the excitation light generating device for emitting excitation light, the laser light generating device for generating an excited light under illumination of the excitation light The laser generating device is installed in the housing, and further includes a heat dissipating device, and the heat dissipating device includes: a heat pipe mounted on the casing; and a heat exchange device mounted on the The heat pipe is at least partially extended to be in contact with the heat exchange device; wherein the heat exchange device is provided with a refrigerant liquid inlet and a refrigerant liquid outlet, and the heat exchange device is further provided with a flow channel therein. The refrigerant inlet and the refrigerant outlet are communicated through the passage. The projection apparatus of claim 4, wherein the heat pipe is curvedly embedded on a surface of the casing. The projection apparatus of claim 5, wherein the heat pipe has three strips, and the three heat pipes respectively extend from one end of the casing to the other end. The projection apparatus of claim 6, wherein the heat exchange device comprises a first housing, a heat exchanger, and a second housing; the first housing is fixed to a surface of the housing, Covering and contacting the heat pipe; the second casing is fixed on the first casing, and the second casing and the first casing are combined to receive the cavity of the heat exchanger. a second casing is provided with a refrigerant liquid inlet and a refrigerant liquid outlet; the heat exchanger is mounted on the first casing and is accommodated in the cavity, and the heat exchanger is provided with a flow channel The flow passage is in communication with the refrigerant liquid inlet and the refrigerant liquid outlet of the second casing. The projection apparatus of claim 7, wherein the first housing covers an end of the heat pipe. The projection apparatus of claim 8, wherein the heat exchange device performs refrigeration by circulating a refrigerant liquid.