Abstrict
An electric heater with a low electromagnetic wave effect, the
heater is mainly used to generate heat in a main pipe line, and
is provided with a loop line and an electric heating line laid juxtaposed
and parallel with each other with a suitable distance therebetween;
by serially connecting the ends respectively of the loop line and
the electric heating line as well as coupling the other ends respectively
of the loop line and the electric heating line with the electric
current loop of an electric source, when electric current flows
through the loop line and the electric heating line, the current
flows therethrough in a contrary direction to offset most of electromagnetic
waves; in this way, the electromagnetic wave effect of the electric
heater is effectively lowered.
Claims
Having now particularly described and ascertained the nature of
my invention and in what manner the same is to be performed, what
we claim will be declared in the claims followed.
1. An electric heater with a low electromagnetic wave effect, said
heater comprises a main pipe line with the function of a heating
electric resistance that results heat emitting, and comprises a
body of said heater, an electric source line is coupled with said
main pipe line to supply electricity, and to complete an electric
current loop, a heat source generated by said heating electric resistance
in said main pipe line makes said body of said heater get the expected
function of heat emitting; said heater is characterized by: an electric
heating line and a loop line are parallelly enveloped in said main
pipe line, wherein, said electric heating line is exactly said heating
electric resistance to generate said heat source, while said loop
line functions as an electric current loop between said electric
source line and said electric heating line; by serially connecting
the ends respectively of said loop line and said electric heating
line as well as coupling the other ends respectively of said loop
line and said electric heating line with the electric current loop
of an electric source, when electric current flows through said
loop line and said electric heating line, said current flows therethrough
in a contrary direction to offset most of electromagnetic waves;
in this way, said electromagnetic wave effect of said electric heater
is effectively lowered.
2. An electric heater with a low electromagnetic wave effect as
in claim 1, wherein, said loop line and said electric heating line
are identical by length.
3. An electric heater with a low electromagnetic wave effect as
in claim 1, wherein, said loop line and said electric heating line
form respectively on the two ends of said main pipe line a first
electric source end and a second electric source end for coupling
with said electric source line as well as a first serial connecting
end and a second serial connecting end for serially connecting with
each other.
4. An electric heater with a low electromagnetic wave effect as
in claim 3, wherein, one end of said main pipe line is slipped thereover
with a serially connecting member able to make lap jointing of said
first serial connecting end with said second serial connecting end.
5. An electric heater with a low electromagnetic wave effect as
in claim 3, wherein, a coupling portion is provided on one end of
said electric source line, said coupling portion makes coupling
of said electric source line, said first electric source end and
said second electric source end.
6. An electric heater with a low electromagnetic wave effect as
in claim 4, wherein, a coupling portion is provided on one end of
said electric source line, said coupling portion makes coupling
of said electric source line, said first electric source end and
said second electric source end.
7. An electric heater with a low electromagnetic wave effect as
in claim 1, wherein, said loop line is formed directly from core
wires in said electric source line.
8. An electric heater with a low electromagnetic wave effect as
in claim 1, wherein, surfaces of said loop line and said electric
heating line are enveloped respectively with a first insulation
layer and a second insulation layer, said loop line and said electric
heating line are laid juxtaposed and parallel with each other, and
are firmly enveloped with an insulating coating to complete the
structure of said main pipe line.
Description BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention is related to an electric heater with
a low electromagnetic wave effect, and especially to an electric
heater to effectively lower electromagnetic wave effect and thereby
effectively lower damage of an electric heater to human bodies due
to the electromagnetic wave effect.
[0003] 2. Description of the Prior Art
[0004] In using a general electric appliance, electromagnetic waves
can be generated by transmitting of the internal electric current,
strength of electromagnetic waves of every electric appliance can
be different, however, according to many reports of study presently,
human bodies will be damaged by electromagnetic waves; the longer
or the nearer the electromagnetic wave effect exists, the larger
the damage will be. People cannot help noticing the electromagnetic
wave effect induced by various electric equipments.
[0005] Among the electric appliances, electric blankets or electric
mats or the like get the most chances to direct and long contact
human bodies. Particularly, the bodies of such kind of electric
appliances are full of heating electric resistance to generate heat
sources. The cause that the heating electric resistance generates
a heat source is, the action of impedance of the electric resistance
transform partial electric energy into heat energy which forms the
heat source. And within the scope of the heating electric resistance,
passage of electric current can generate an electromagnetic wave
effect adequate to influence human bodies. A user in a long and
direct contact with an electric heater will be damaged quite a degree
by the electromagnetic wave effect.
SUMMARY OF THE INVENTION
[0006] The primary object of the present invention is to provide
an electric heater with a low electromagnetic wave effect, by providing
mutually spaced, parallel and juxtaposed loop line and electric
heating line in the main pipe line which forms the heating action,
and by serially connecting the ends respectively of the loop line
and the electric heating line as well as coupling the other ends
respectively of the loop line and the electric heating line with
the electric current loop of an electric source, when electric current
flows through the loop line and the electric heating line, the current
flows therethrough in a contrary direction to offset most of the
electromagnetic waves. In this way, the electromagnetic wave effect
of the electric heater can be effectively lowered.
[0007] The present invention will be apparent after reading the
detailed description of the preferred embodiments thereof in reference
to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a perspective view showing the appearance of an
electric heater of the present invention;
[0009] FIG. 2 is an analytic perspective view of the present invention;
[0010] FIG. 3 is a schematic perspective view showing the electric
current direction of the present invention;
[0011] FIG. 4 is a sectional view of showing the structure of an
insulating member of the present invention;
[0012] FIG. 5 is a sectional view showing the structure of another
insulating member of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0013] Referring to FIG. 1, it can be seen that the electric heater
with a low electromagnetic wave effect of the present invention
is comprised of a main pipe line 1 with the function of a heating
electric resistance resulting heat emitting, and is comprised of
a body 3 of the heater, an electric source line 2 is coupled with
the main pipe line 1 to supply electricity, and to complete an electric
current loop, the heat source generated by the heating electric
resistance in the main pipe line 1 makes the body 3 of the heater
get the expected function of heat emitting.
[0014] Referring to FIGS. 2 and 3 simultaneously, an electric heating
line 12 and a loop line 11 are parallelly enveloped in the main
pipe line 1, wherein, the electric heating line 12 is exactly the
heating electric resistance to generate the heat source, while the
loop line 11 functions mainly as the electric current loop between
the electric source line 2 and the electric heating line 12. By
virtue that the loop line 11 and the electric heating line 12 are
parallelly juxtaposed with each other in the main pipe line 1, they
form respectively on the two ends of the main pipe line 1 a first
electric source end 111, a second electric source end 121 for coupling
with the electric source line 2 and a first serial connecting end
112 and a second serial connecting end 122 for serially connecting
with each other. The loop line 11 and the electric heating line
12 are firmly enveloped with an enveloping layer 13 to complete
the structure of the main pipe line 1. The enveloping layer 13 provides
insulation between the loop line 11 and the electric heating line
12, as shown in FIG. 4, to make a separation for electric current
to keep the loop line 11 away from the electric heating line 12
a suitable distance.
[0015] In practical application of the entire electric heater,
as shown in FIGS. 2 and 3, the firing line and the earthing line
of the electric source line 2 are respectively coupled with the
first electric source end 111 of the loop line 11 in the main pipe
line 1 and the second electric source end 121 of the electric heating
line 12; while the first serial connecting end 112 of the loop line
11 is lap jointed with the second serial connecting end 122 of the
electric heating line 12. Therefore, when current flows through
the electric source line 2 into the main pipe line 1, it will enter
from the first electric source end 111 of the main pipe line 1,
and arrive at the lap joint between the first serial connecting
end 112 and the second serial connecting end 122 along the loop
line 11. The current can thereby flows along the electric heating
line 12 in a contrary direction to the second electric source end
121 and out of the electric heating line 12 to form a complete electric
current loop. And when the current flows through the electric heating
line 12, it is transformed into heat energy by the action of impedance
to thereby form a heat source adequate to render the electric heater
to emit heat. Especially when the current flows through the loop
line 11 to get into the main pipe line 1 and then is put out from
the main pipe line 1 via the electric heating line 12 in a contrary
direction, the whole section of the main pipe line 1 can have most
of its electromagnetic waves offset by the mutual contrary flowing
of the current portions in the loop line 11 and the electric heating
line 12, thereby, the electromagnetic wave effect of the main pipe
line 1 can be effectively lowered, and damage of the electromagnetic
wave effect to human bodies by the electric heater can be reduced.
[0016] Further as shown in FIGS. 1 and 2, the main pipe line 1
of the present invention can be made to have a corresponding length
to meet the practical cut length required for the device 3 in use.
One end of the main pipe line 1 is slipped thereover with a serially
connecting member 14 able to make lap jointing of the first serial
connecting end 112 with the second serial connecting end 122; while
a coupling portion 21 is provided on one end of the electric source
line 2, the coupling portion 21 makes coupling of the electric source
line 2, the first electric source end 111 and the second electric
source end 121; thereby, the practicality and scope of application
of the entire electric heater can be increased. And as shown in
FIG. 5, in manufacturing the main pipe line 1, the surfaces of the
loop line 11 and the electric heating line 12 can be enveloped respectively
with a first insulation layer 16 and a second insulation layer 17,
and the loop line 11 and the electric heating line 12 are laid juxtaposed
and parallel with each other, and are firmly enveloped with an insulating
coating 15 to complete the structure of the main pipe line 1.
[0017] In the electric heater with a low electromagnetic wave effect
of the present invention, by providing the mutually spaced, parallel
and juxtaposed loop line and electric heating line, and by serially
connecting the ends respectively of the loop line and the electric
heating line as well as coupling the other ends respectively of
the loop line and the electric heating line with the electric current
loop of an electric source, when electric current flows through
the loop line and the electric heating line, the current flows therethrough
in a contrary direction to offset most of the electromagnetic waves.
In this way, the electromagnetic wave effect of the electric heater
can be effectively lowered. Therefore, electric heaters can get
another structure which is better and practicable,
|