U.S. patent application number 12/928343 was filed with the patent office on 2011-06-30 for liquid cooling device.
This patent application is currently assigned to MAN ZAI INDUSTRIAL CO., LTD.. Invention is credited to Su-Chen Hu, Hao-Hui Lin, Cheng-Feng Wan.
Application Number | 20110155353 12/928343 |
Document ID | / |
Family ID | 44186033 |
Filed Date | 2011-06-30 |
United States Patent
Application |
20110155353 |
Kind Code |
A1 |
Wan; Cheng-Feng ; et
al. |
June 30, 2011 |
Liquid cooling device
Abstract
A liquid cooling device is mounted in a large-sized overhead
projector to absorb heat generated by a light-generating device.
The liquid cooling device has a water tank, a heat sink, a liquid
block assembly and a pump. The water tank has an outlet hole formed
on the middle of the water. The heat sink communicates with the
water tank. The liquid block assembly contacts the light-generating
device and is filled with a coolant and communicates with the heat
sink via an inlet duct. The pump is mounted in the large-sized
overhead projector and is in fluid communications with the water
tank via an outlet duct mounted in the outlet hole of the water
tank. Therefore, when the large-sized overhead projector is put
upright or turned upside down, the outlet hole is always in the
middle of the water tank, preventing the pump from idling and being
damaged as the amount of coolant is reduced.
Inventors: |
Wan; Cheng-Feng; (Tainan,
TW) ; Lin; Hao-Hui; (Tainan, TW) ; Hu;
Su-Chen; (Tainan, TW) |
Assignee: |
MAN ZAI INDUSTRIAL CO.,
LTD.
|
Family ID: |
44186033 |
Appl. No.: |
12/928343 |
Filed: |
December 9, 2010 |
Current U.S.
Class: |
165/104.31 |
Current CPC
Class: |
G03B 21/16 20130101;
F28D 15/00 20130101; F28F 2280/10 20130101; F28F 9/0246
20130101 |
Class at
Publication: |
165/104.31 |
International
Class: |
F28D 15/00 20060101
F28D015/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 30, 2009 |
TW |
098224663 |
Claims
1. A liquid cooling device mounted in a large-sized overhead
projector to absorb heat generated by a light-generating device,
and comprising: a water tank being hollow comprising a middle; a
side surface; an outlet hole formed on the middle of the water
tank; a heat sink connected to the side surface of the water tank;
a liquid block assembly adapted for contacting the light-generating
device and connected with the heat sink via an inlet duct; and a
pump being in fluid communications with the water tank via an
outlet duct that is connected to the outlet hole of the water tank,
and the pump connected with the liquid block assembly via a
pipe.
2. The liquid cooling device as claimed in claim 1, wherein the
liquid block assembly comprises: multiple liquid blocks connected
with each other via a tubing, each of the liquid blocks having a
surface for contacting the light-generating device, and the inlet
duct connecting one of the liquid blocks with the heat sink, and
the pipe connecting the other liquid block with the pump.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a liquid cooling device, and more
particularly to a liquid cooling device used to cool a
light-generating device mounted within a large-sized overhead
projector.
[0003] 2. Description of Related Art
[0004] A large-sized overhead projector comprises a
light-generating device. The light-generating device often has a
high temperature while working in high performance mode. To
effectively reduce the temperature, a modern approach is to install
a liquid cooling device on the light-generating device. The liquid
cooling device absorbs and dissipates heat generated by the
light-generating device.
[0005] With reference to FIG. 2, a conventional liquid cooling
device comprises a water tank 90, a heat sink 91, a pump 94 and a
liquid block assembly 96. The water tank 90 has a chamber, a top, a
bottom and an outlet hole 911. The outlet hole 911 is near the
bottom of the water tank 90, and communicates with the chamber and
an outlet duct 92. The heat sink 91 is connected with the water
tank 90 and an inlet duct 93 is mounted at the top of the water
tank 90. The pump 94 is mounted in the large-sized overhead
projector and is in fluid communications with the water tank 90 via
the outlet duct 92. The liquid block assembly 96 comprises multiple
liquid blocks 97 connected with each other via tubing 98. The
liquid blocks 97 are filled with coolant and are connected with the
light-generating device 99 of the large-sized overhead projector to
directly absorb heat generated by the light-generating device 99.
One of the liquid blocks 97 is connected with the heat sink 91 via
the inlet duct 93, and the other one of the liquid blocks 97 is
connected with the pump 94 via a pipe 95.
[0006] Therefore, the coolant is driven by the pump 94 to circulate
between the heat sink 91 and the liquid blocks 97. The coolant
exchanges heat with the liquid blocks 97 when the coolant flows
through the liquid blocks 97. After the coolant dissipates the heat
when it flows through the heat sink 91, the coolant circulates back
to the liquid blocks 97 for heat exchange again.
[0007] However, the large-sized overhead projector can be put on a
table or hung upside down on a ceiling. When the large-sized
overhead projector is hung upside down the outlet hole 911
originally at the bottom of the water tank 90 is moved to the top
of the water tank 90. Therefore, when the amount of coolant in the
water tank 90 is reduced the coolant in the water tank 90 cannot
flow out of the outlet duct 92 and cannot pass the liquid block
assembly 96. Consequently, the pump 94 idles and is quickly
damaged.
SUMMARY OF THE INVENTION
[0008] An objective of the invention is to provide a liquid cooling
device that prevents the pump of the liquid device from idling and
being damaged.
[0009] A liquid cooling device is mounted in a large-sized overhead
projector to absorb heat generated by a light-generating device.
The liquid cooling device comprises a water tank, a heat sink, a
liquid block assembly and a pump. The water tank is hollow and has
a middle, a side surface and an outlet hole. The outlet hole is
formed on the middle of the water tank. The heat sink connects to
the side surface of the water tank. The liquid block assembly
contacting the light-generating device. The liquid block assembly
connects to the heat sink via an inlet duct. The pump is in fluid
communications with the water tank via an outlet duct that is
mounted in the outlet hole of the water tank. The pump connects
with the liquid block assembly via a pipe. Therefore, when the
large-sized overhead projector is put upright or turned upside
down, the outlet hole of the water tank is always kept in the
middle of the water tank. Then, a coolant being filled in the
liquid cooling device flows out of the water tank to the liquid
block assembly by the pump through the outlet duct and the pump.
The outlet hole of the water tank being in the middle of the
housing prevents the pump from idling and being damaged.
[0010] Other objectives, advantages and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a perspective view of a liquid cooling device in
accordance with the present invention;
[0012] FIG. 2 is a perspective view of a conventional liquid
cooling device;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0013] With reference to FIG. 1, a liquid cooling device in
accordance with the present invention is mounted in a large-sized
overhead projector to absorb heat generated by a light-generating
device 40. The liquid cooling device is filled with a coolant and
comprises a water tank 10, a heat sink 11, a liquid block assembly
30 and a pump 20.
[0014] The water tank 10 is hollow and has a top surface, a bottom
surface, a middle, a side surface and an outlet hole 14. The outlet
hole 14 is formed on the middle of the housing and communicates
with the chamber. The distance between the outlet hole 14 and the
top surface of the housing is almost equal to the distance between
the outlet hole 14 and the bottom surface of the housing.
[0015] The heat sink 11 is connected with the side surface of the
water tank 10.
[0016] The liquid block assembly 30 communicates with the heat sink
11 via an inlet duct 13. In this embodiment, the liquid block
assembly 30 comprises multiple liquid blocks 31. The liquid blocks
31 are connect with each other via tubing 32. Each of the liquid
blocks 31 has a surface for contacting the light-generating device
40. The inlet duct 13 communicates with one of the liquid blocks 31
and the heat sink 11.
[0017] The pump 20 is in fluid communications with the water tank
11 via an outlet duct 12 connected to the outlet hole 14 of the
water tank 10. The pump 20 is connected with the other one of the
liquid blocks 31 of the liquid block assembly 30 via a pipe 21.
[0018] The pump 20 of liquid cooling device drives the coolant in
the water tank 10 flowing out of the water tank 10 and passing
through the outlet hole 14, the outlet duct 12 and the pump 20 to
the liquid block assembly 30. Then, the coolant in the liquid block
assembly 30 flows into the heat sink 11 further into the water tank
10.
[0019] When the large-sized overhead projector is put upright or
turned upside down, the outlet hole 14 of the housing is always
kept in the middle of the housing. Therefore, even if the amount of
coolant in the water tank 10 is reduced, the coolant can still flow
smoothly out of the outlet hole 14 of the water tank 10. Therefore,
the outlet hole 14 of the water tank 10 being in the middle of the
housing prevents the pump 20 from idling and being damaged.
[0020] Even though numerous characteristics and advantages of the
present invention have been set forth in the foregoing description,
together with details of the structure and function of the
invention, the disclosure is illustrative only. Changes may be made
in detail, especially in matters of shape, size, and arrangement of
parts within the principles of the invention to the full extent
indicated by the broad general meaning of the terms in which the
appended claims are expressed.
* * * * *