Electric lamp and discharge devices: systems – With load device temperature modifier
Reexamination Certificate
2002-08-07
2004-08-10
Lee, Wilson (Department: 2821)
Electric lamp and discharge devices: systems
With load device temperature modifier
C315S248000, C362S373000
Reexamination Certificate
active
06774571
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to an electrodeless lighting system, and in particular to an electrodeless lighting system having a cooling unit capable of cooling a radiating unit therein. 2. Description of the Prior Art
An electrodeless lighting system generates light by forming plasma by exciting light emitting materials charged inside a bulb as a vacuum state with microwave energy.
FIG. 1
is a schematic longitudinal sectional view illustrating a construction of the conventional electrodeless lighting system.
As depicted in
FIG. 1
, the conventional electrodeless lighting system includes a microwave generating unit
10
installed inside a housing
50
and generating microwave energy; a power supply unit
40
applying power to the microwave generating unit
10
; a waveguide
20
connected to the microwave generating unit
10
and transmitting the microwave energy generated in the microwave generating unit
10
; a light emitting unit
30
forming plasma
20
and generating light by being excited by the microwave energy transmitted through the waveguide
20
; and a cooling fan
60
installed at a certain side of the housing
50
and cooling the microwave generating unit
10
and the power supply unit
40
.
The light emitting unit
30
includes a bulb
31
in which light emitting materials are charged, a waveguide
20
, a resonator
32
covering the front of the bulb
31
to cut off microwave energy and pass light generated in the bulb
31
, a reflecting mirror
33
receiving the resonator
32
and intensely reflecting light generated in the bulb
31
straight and a dielectric mirror
34
passing microwave energy and reflecting light.
In the housing
50
, a cooling fan
60
is received, an air suction hole
61
is formed at the lower portion corresponding to the cooling fan
60
, an air path
62
is formed at the right and left portions of the air suction hole
61
, and an air outlet
63
is formed at the upper portion of the housing
50
so as to correspond to the both ends of the air path
62
.
The microwave generating unit
10
and the power supply unit
40
are placed between the air path
62
and the air outlet
63
and are respectively combined to the both sides of the waveguide
20
.
A non-explained reference numeral
35
is an axial portion, M
1
is a bulb motor rotating the bulb
31
, and M
2
is a fan motor rotating the cooling fan
60
.
The operation of the conventional electrodeless lighting system will be described in more detail.
According to an operation signal from a control unit (not shown), the power supply unit
40
supplies power to the microwave generating unit
10
, and the microwave generating unit
10
generates microwave energy having a high frequency.
While the microwave energy generated in the microwave generating unit
10
is transmitted into the resonator
32
through the waveguide
20
, the light emitting materials charged inside the bulb
31
are excited and form plasma, and accordingly light is generated. The generated light lights the surroundings by being reflected by the reflecting mirror
33
and the dielectric mirror
34
toward the front.
In the meantime, while the electrodeless lighting system operates, lots of heat occurs in the microwave generating unit
10
and the power supply unit
40
, etc., in particular, in the microwave generating unit
10
such as a magnetron, part of high frequency energy generated by thermal electron is not discharged but converted into heat, and accordingly an internal temperature of the housing
50
rises.
And, heat generated in the microwave generating unit
10
and the power supply unit
40
, etc. may damage the internal units of the electrodeless lighting system such as the magnetron and the power supply unit
40
or cause unstableness of the system.
Accordingly, there is a need to cool the heat generated in the microwave generating unit
10
and the power supply unit
40
, etc., as depicted in
FIG. 1
, in the conventional electrodeless lighting system, to cool heat generated in the microwave generating unit
10
, etc. outer air flows into the housing
50
by operating the cooling fan
60
.
However, in the conventional electrodeless lighting system, because outer air flows into the housing
50
by operating the cooling fan
60
, impurities may penetrate into the housing
50
, and accordingly the internal units may be damaged. Particularly, when the electrodeless lighting system is installed at the exterior, rain drops or other impurities may penetrate into the housing
50
, and accordingly various parts may be damaged.
SUMMARY OF THE INVENTION
In order to solve the above-mentioned problems, it is an object of the present invention to provide an electrodeless lighting system having a cooling unit capable of being installed in a housing and efficiently cooling a microwave generating unit sealed in the housing.
In order to achieve the above-mentioned object, an electrodeless lighting system in accordance with the present invention includes a microwave generating unit for generating microwave energy; a light emitting unit connected to the microwave generating unit and emitting light by forming plasma by the microwave energy generated in the microwave generating unit; a housing having a first receiving space for receiving the microwave generating unit and sealed-combined with the light emitting unit; a heat exchanger installed at the outer surface of the microwave generating unit to absorb heat generated in the microwave generating unit; a radiator installed at the outer surface of the housing; and a heat transfer member at which one end is connected to the heat exchanger and the other end is connected to the radiator by penetrating the housing to transmit heat from the heat exchanger to the radiator.
The system further includes a fan housing having an air inlet hole for air inflow, an air discharge hole for discharging air and an air path connected to the air inlet hole and the air discharge hole and fixedly installed at the outer surface of the housing; and a fan installed in the air path to generate air flow in the air path; wherein the radiator is installed in the air path.
REFERENCES:
patent: 4645967 (1987-02-01), Bouman et al.
patent: 4727294 (1988-02-01), Houkes et al.
patent: 5786667 (1998-07-01), Simpson et al.
patent: 5803566 (1998-09-01), Ogino
patent: 5847517 (1998-12-01), Ury et al.
patent: 5998934 (1999-12-01), Mimasu et al.
patent: 2002/0105276 (2002-08-01), Jeon
patent: 2002/0140381 (2002-10-01), Golkowski et al.
patent: 2003/0141828 (2003-07-01), Choi et al.
Choi Joon-Sik
Jeon Hyo-Sik
Jeon Yong-Seog
Kim Hyun-Jung
Lee Ji-Young
Birch & Stewart Kolasch & Birch, LLP
Lee Wilson
LG Electronics Inc.
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