Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
BACKGROUND OF THE INVENTION
This invention relates to a micro-controller and
particularly to a a micro-controller for water discharye.
Conventional water timer has the following disadvantage.s:
1. The water flow detector disposed on the
conventional water timer is mechanical type therefore,
as the water pressure is beyond the predetermined
valve, the water flow thereof can not be precisely
controlled.
2. Since lacking the autornatic timing system, the
control valve of the conventional water timer can only
be operated manually.
It is, therefore, an object of the present
invention to get rid of and reduce severity of the
above-noted drawbacks.
SUMMARY OF T~E INVENTION
It is the primary ob~ect of the present invention
to provide a micro-controller for water discharge
wherein a water wheel actuated by water flow rate is
cooperated with a reed relay to detect the water
pressure and water flow rate therethrough.
It is another object of the present invention to
provide a micro-controller for water discharge wherein
a plurality of control keys associated with liquid
crystal display are used to present the discharging
period thereby the controller capable of being operated
automatically.
It is still another object of the present
invention to provide a water-micro-controller which is
easy to fabricate.
It is a further ob~ect of the present invention to
provide a water-micro-controller which is practical for
use.
BRIEF DESCRIPTION OF THE DRA~INGS
FIG. 1 is a perspective view of a preferred
embodiment of the present invention;
FIG. 2 is a fragmentary perspective view of FIG.
1 ;
FIG. 3 is a cross-sectional view taken along the
line A-A of FIG. l;
FIG. 4 is a local perspective view thereof
illustrating the post being in its lower position while
the valve being in its closed state; and
FIG. 5 is a local perspective view sirnilar to FIG.
4 showing the post being in its upper position so that
the valve can be opened by the post.
DETAILED DESCRIPTION OF TIIE PREFERRED EMBODIMENT
Referring to the drawings and particularly to FIG.
2, a water-micro-controller (10) comprises a front
cover portion (1) provided with a front panel (11). A
control circuit (12) associated with a liquid crystal
display (121) and a plurality of control keys (~22) is
disposed in the front cover portion (1) with ti;e liquid
crystal display (121) and the control keys (122)
mounted on the front panel (11) thereof. A dust-
protect cover (13) is disposed on the front panel (11)
of the front cover portion (1) to protect the liquid
crystal display (121) and the control keys (122)
disposed therein.
A rear cover portion (2) capable of being secured
to the front cover portion (1) is provided at its
interior with a recess (21). A control valve mechanism
(3) is integrally formed with the rear cover portion
(2) and will be described later. A front plate (4)
provided at the inner side with a limited switch (41)
is arranged to be disposed in the front cover portion
(1). A rear plate (5) having a reed relay (51)
disposed thereon also is arranged to be located in the
front cover portion (1) and adjacent to the front plate
(4) thereof. A shaft (6) passing through the rear
plate (5) is supported at both ends respectively to the
front plate (4) and the rear cover portion (2~. A gear
sets ~61) associated with a small cam (62) is secured
to the shaft (6) and located between the front and rear
plates (4) and (5). A motor (7) provided with a gear
shaft (71) is disposed in such a manner that the gear
shaft (71) is arranged to drive the gear sets (61)
together with the shaft (6) L,o rotate. A water wheel
(63) provided around the central axis with a plurality
of magnetic sensor cores (631) is rotatably mounted
on the shaft (6) such that when the water wheel (63) is
driven to rotate by the water, the magnetic sensor
cores (631) disposed therein can respectively cross the
reed relay (51) thereof. The water wheel (63) is
arranged to be received in the recess (21) of the rear
cover portion (2). A special designed cam (Ç4) is
secured to the shaft (6) and received within the recess
(21) of the rear cover portion (2).
The control valve mechanism (3) mainly comprises a
cylindrical chamber ~31) which is formed at the top
with a round recess (311) and at the bottom with an
inlet (312) (FIG. 3). A post (32) furnished ~ith an
enlarged end (321) is disposed in the cylindrical
chamber (31) with lts enlarged end (321) corresponding
to the cam (64). A supporting frame (33) having a
valve (331) disposed thereon is located in the round
recess (311) of the cylindrical chamber (31) and
corresponds to the post (32) thereof. A positioning
cover (34) with a spring-loaded positioning plug (341)
received therein is secured to the bottom side of the
round recess (311) of the cylindrical chamber (31) by
means of screws or other suitable members. A connector
(35) having a filter (36) disposed therein is mounted
on the top of the positioning cover (34) and secured
thereto by a top cover (37) which is threadedly engaged
with the top of the cylindrical chamber (31). The
controller (10) can be disposed between facets (not
shown) to control the water flow rate therethrough.
Referring to FIGS. 3 and 4, when the water is
emitted into the cylindrical chamber (31) through the
inlet (312) thereof, the quantity of water flow rate
can be detected in such a manner that the water wheel
(63) received in the recess (21) of the rear cover
portion (2) can be driven to rotate by the emitting
water therefore the magnetic sensor cores (631)
disposed in the water wheel (63) will cross the reed
~2~
relay (51) of the rear plate ~5) in sequence to actuate
it in a corresponding frequency and then an equivalent
signal generated by the reed relay ~51) is fed into the
control circuit (12) to be displayed on the liquid
crystal display (121). Accordingly, the user can
obtain the desired data directly from the liquid
crystal display (121) to realize the corresponding
water flow therethrough.
The control valve mechanism (3) is arranged to be
controiled by the control circuit (12) associated with
the motor (7). When the motor (7) is actuated by the
control circuit (12), the gear (61) together with the
shaft (6) will be rotated by the gear shaft (71) of the
motor ~7). Then the special designed cam (64) is
rotated therewith to drive the post (32) to move up and
down. As the post (32) is moved downward, the valve
(331) will closely contact with the supporting frame
(33) by the spring-loaded positioning plug (341) to
block water passing through the cylindrical chamber
(31). On the other hand, when the post (32) is moved
upward, the valve (331) will be lifted up by the post
(32) to allow the water emitted from the inlet (312) of
the cylindrical chamber (31) to pass therethrough.
Referring to FIG. 4, when the post (32) is in its
lower position while the valve (331) in its closed
state, the small cam (62) will not contact with limited
switch (41) of the front plate (4) so that the motor
(7) can be actuated to drive the cam (64) to rotate in
a predetermined manner and intends to move the post
(32) upward to open the valve (331) thereof.
Referring to FIG. 5, as soon as the post (32)
reaches its upper position and opens the valve (331)
thereof, the small cam (62) will contact with the
limited switch (41) of the front plate (4) to generate
a signal which is used to turn off the motor (7) to
make the valve (331) remain in its open state.
Then, the motor (7) is arranged to be actuated
again after a predetermir,ed discharging period set by
the micro-controller program which is stored in the
micro-computer to rotate the special designed cam (64)
and hence to move the post (32) downward to make the
valve (331) closed. It is noted that as soon as the
small cam (62) disconnects from the limited switch (41)
of the front plate (4), a corresponding signal will be
generated to turn off the motor (7) to maintain the
valve (331) in its closed state. Such procedures can
be repeated in accordance with the reguirements of the
user.
In operation, the controller (10) can be disposed
between the facets (not shown) to control the water
flow rate therethrough. lhe function of the control
keys (122) are clescribed as follow:
1. OPEN/C~OSE key is used to control the valve
(331) to stay in its open state or in its closed st!ate.
2. AUTO/MANU key is used to make this controller
operated either in automatic manner or in manual
manner.
3. MFR (measure flow rate) key is used to measure
the water pressure therein.
4. GA DSP (Gallons Display) key is used to
display the total quantity of water.
5. CLOCK SET key is used to set the operating
t me and the current time.
6. T/P SET key (time/period set) is used to set
the starting time and discharing time.
7. HR/DAY (hour/day) key is used to set the
discharging time per day.
8. MIN (minute) key is used to set period of the
spraying time by minute.
Accordingly, this present invention can detect
the water pressure and water flow rate to precisely
control the discharging time. Besides, the detecting
technique thereof is different from that of the
~'~4~3~
conventional mechanical gear detector thereby having
longer life time. Furtherrnore, the discharging period
- can be set in accordance with the user s requirements.
It is noted that this invention further can
comprise a humidity sensor to detect the humidity
existing in the environment whereby as the humidity is
~eyond a predetermined value the present invention can
automatically stop the discharging function.
