Control method using power to prevent overheat inside of...

Details Control method using power to prevent overheat inside of... Control method using power to prevent overheat inside of...

2000-09-26

2003-01-07

Wu, Daniel J. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S588000, C340S589000, C340S679000, C340S635000, C340S643000

Reexamination Certificate

active

06504484

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a control method using power to prevent overheat inside of an electric equipment.
2. Description of the Related Art
A conventional electric equipment in accordance with the prior art shown in
FIG. 1
comprises a circuit
3
including a main circuit
30
having a main switch
301
and including branch circuits
31
,
32
,
33
,
34
. . . each having a branch switch
311
,
321
,
331
,
341
,
332
,
342
. . . and each corresponding to a load
312
,
322
,
333
,
343
. . . However, in the electric equipment, not only the loads
312
,
322
,
333
,
343
. . . will incur the phenomenon of overheat or fading, but the branch switches
311
,
321
,
331
,
341
,
332
,
342
. . . or the like will also incur the phenomenon of overheat or fading.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a control method using power to prevent overheat inside of an electric equipment comprising the steps of:
(1) when a detecting value (TA) is greater than a first temperature setting value (TS
1
) plus a setting difference value (X), namely, TA>TS
1
+X, the load is unloaded to a first grade of power (P
1
);
(2) when the detecting value (TA) minus a second temperature setting value (TS
2
) is equal to a second temperature setting difference value (&Dgr;T
2
), and the second temperature setting difference value (&Dgr;T
2
) is greater than a first temperature setting difference value (&Dgr;T
1
) plus the setting difference value (X), namely, TA−TS
2
=&Dgr;T
2
, and &Dgr;T
2
>&Dgr;T
1
+X, then the load is continuously unloaded to a second grade of power (P
2
), then, when the detecting value (TA) sequentially minus each grade of temperature setting value (TS
3
. . . TS
n
) is equal to each grade of temperature setting difference value (&Dgr;T
3
. . . &Dgr;T
n−1
,&Dgr;T
n
), and each grade of the temperature setting difference value (&Dgr;T
3
. . . &Dgr;T
n−1
, &Dgr;T
n
) is greater than a former grade of temperature setting difference value (&Dgr;T
4
. . . &Dgr;T
n−2
, &Dgr;T
n−1
) plus the grade of setting difference value (X), namely, TA−TS
n
=&Dgr;T
n
, and &Dgr;T
n
>&Dgr;T
n−1
+X, then the load is successively unloaded to a minimum power (P
min
);
(3) when the detecting value (TA) minus a first reload temperature setting value (TS′
1
) is equal to a first reload temperature setting difference value (&Dgr;T′
1
), and the first reload temperature setting difference value (&Dgr;T′
1
) is smaller than a temperature setting difference value (&Dgr;T′) minus the setting difference value (X), namely, TA−TS′
1
=&Dgr;T′
1
, and &Dgr;T′
1
<&Dgr;T′−X, then the load is continuously reloaded to a first grade of power (P
1
), then, when the detecting value (TA) sequentially minus each grade of reload temperature setting value (TS′
2
. . . TS′
n
) is equal to each grade of reload temperature setting difference value (&Dgr;T′
2
. . . &Dgr;T′
−1
, &Dgr;T′
n
), and each grade of reload temperature setting difference value (&Dgr;T′
2
. . . ′T′
n−1
, &Dgr;T′
n
) is smaller than a former grade of reload temperature setting difference value (&Dgr;T′
1
. . . &Dgr;T′
n−2
, &Dgr;T′
n−1
) minus the grade of setting difference value (X), namely, TA−TS′
n
=&Dgr;T′
n
, and &Dgr;T′
n
>&Dgr;T′
n−1
+X, then the load is successively reloaded to a maximum power (P
max
).
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.


REFERENCES:
patent: 5929762 (1999-07-01), Missimer, Jr.
patent: 6087949 (2000-07-01), Yanagida
patent: 6124793 (2000-09-01), Knutson
patent: 6170562 (2001-01-01), Knoblauch
patent: 6172860 (2001-01-01), Yoshimizu et al.

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