Automatic flush toilet detergent and perfume dispenser

An automatic flush toilet detergent and perfume dispenser of the type having a detergent dispensing device controlled by water pressure to send a fixed amount of a detergent into a water container being linked to the flush pipe of a toilet flushing system, and a DC motor fan operated perfume dispensing device controlled to spray a liquid perfume into the air, the improvement including two full water level detector probes detect water level and to give a signal when water in the water container reaches full water level, a buzzer, light emitting devices, a control circuit controlled by the signal from the full water level detector probes to turn on the DC motor fan, the buzzer, and the light emitting devices, and a manual control switch controlled to trigger the control circuit manually.

BACKGROUND OF THE INVENTION 
The present invention relates to an automatic flush toilet detergent and 
perfume dispenser which sends a fixed amount of a detergent into the flush 
toilet and sprays a liquid perfume into the air each time the flushing 
system is operated. 
The techniques of mounting a chemical dispensing device on the toilet to 
send a detergent into the toilet upon each use of the lavatory, have been 
known and described in U.S. Pat. Nos. 1,447,289; 1,643,286, 3,417,410; 
3,913,151. 
According to U.S. Pat. 1447289, a water container is provided to take water 
from the flush pipe of a toilet flushing system, having a float on the 
inside. The floats opens a valve to let a soluble perfume enter the water 
container, when water in the water container reaches full water level. 
Because the perfume is immediately carried away and disappears in the 
sewerage system, little smell of the perfume is distributed into the air. 
According: to U.S. Pat. No. 1,643,286, a detergent container is disposed 
inside a water container, and a linkage is installed in the exhaust valve 
of the detergent and water containers for controlling the output of the 
detergent from the detergent container :into the water flushing system by 
means of the control of water pressure. This structure of the detergent 
dispensing device is bulky and produces noises during its operation. 
Another drawback of this structure of detergent dispensing: device is that 
it does not fit all types of toilets. 
According to U.S. Pat. No. 3,417,410, a detergent container is provided, 
having a guide tube to guide flushing water from the flush pipe into the 
detergent container for mixing with the detergent, and a drain tube for 
guiding mixed detergent solution out of the detergent container into the 
flush pipe again. 
According: to U.S. Pat. No. 3,913,151, a detergent container is received 
inside a water container. The detergent container has a drain port at the 
bottom mounted with two control valves. When the water container is empty, 
the control valves drop to stop the outlet of the detergent dispensing 
chamber. When water in the water container is increasing, the first 
control valve will be lifted by a float to close the drain port. When 
water in the water container is continuously increasing, the second 
control valve will be lifted to open the outlet of the detergent 
dispensing chamber for letting the detergent being prepared in the 
detergent dispensing chamber driven out of the detergent dispensing 
chamber into the water container. 
The aforesaid structures do not provide any function for allowing the user 
to check the existing amount of the detergent (perfume) in the detergent 
(perfume) container visually. Furthermore, they do not spray any perfume 
into the air but simply send a soluble perfume, if any, into flushing 
water. Therefore, these devices do not provide the function of purifying 
the air. 
SUMMARY OF THE INVENTION 
The present invention has been accomplished to provide an automatic flush 
toilet detergent and perfume dispenser which eliminates the aforesaid 
drawbacks. According to one aspect of the present invention, the automatic 
flush toilet detergent and perfume dispenser comprises a detergent 
dispensing device controlled by water pressure to send a fixed amount of a 
detergent into a water container being linked to the flush pipe of a 
toilet flushing system, and a DC motor fan operated perfume dispensing 
device controlled to spray a liquid perfume into the air. According to 
another aspect of the present invention, the housing of the automatic 
flush toilet detergent and perfume dispenser has a view window for 
allowing the user to check the existing amount of the detergent in the 
detergent container and the perfume in the perfume container. According to 
still another aspect of the present invention, the automatic flush toilet 
detergent and perfume dispenser further comprises two full water level 
detector probes to detect water level in the water container and to give a 
signal when water in the water container reaches full water level, a 
buzzer, light emitting devices, a control circuit controlled by the signal 
from the full water level detector probes to turn on the DC motor fan, the 
buzzer, and the light emitting means. According to still another aspect of 
the present invention, a manual control switch is provided and controlled 
to trigger the control circuit manually for checking the operation of the 
automatic flush toilet detergent and perfume dispenser.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIG. 1, the automatic flush toilet detergent and perfume 
dispenser comprises a housing 1 having a view window 111 on the front 
panel thereof at one corner, through which the internal arrangement of the 
dispenser is viewed, and a shutter 12 on the front panel at another 
corner, through which a perfume is sent out. 
Referring to FIGS. 2 and 3, a top-open water container 2 is mounted on the 
horizontal wall of an angle base plate 11 inside the housing 1, The water 
container 2 comprises a valve seat 212 on the bottom 20 thereof for 
passing water. A water guide device 6 is provided to guide flushing water 
into the water container 2. The water guide comprises a guide pipe 62 
connected to the valve seat 212 by a pipe connector 61. The water guide 
pipe 62 has a beveled front end 621 inserted into a hole (not shown) on 
the flush pipe 7 of a flushing system for guiding water from the flushing 
system into the water container 2. A float 21 is disposed in a vertical 
track 210 inside the water container 2 and mounted on an upright rod 211 
at the top. The bottom end of the upright rod 211 is coupled with a valve 
cone 213. The valve cone 213 is received inside the pipe connector 61 and 
moved to control the passage of the valve seat 212. A detergent dispensing 
device 4 is fastened inside the housing 1 and disposed above the water 
container 1. When water is guided into the water container 2, the 
detergent dispensing device 4 will send out a fixed amount of the 
detergent being contained therein to mix with water in the water container 
2, and then the detergent solution will be drawn away from the water 
container 2 into the flush pipe 7 again. The detergent dispensing device 4 
comprises a transparent detergent container 41, which holds a detergent 
(such as quaternary ammonium compound) and has a bottom opening 410 (see 
FIG. 7), a dispensing cap 42 fastened to the bottom opening 410 of the 
transparent detergent container 41 and disposed inside the water container 
2 at the top, and a dispensing valve 43 fastened to the dispensing cap 42 
and moved by water to control the passage through the bottom opening 410. 
Referring to FIG. 7, when the water container 2 contains; no water, only a 
small amount of the detergent flows out of the transparent detergent 
container 41 into a preservation chamber 436 inside the dispensing cap 42. 
The preservation chamber 436 is disposed in communication with the 
atmosphere by a small through hole 420 on the dispensing cap 42 and a 
water intake hole 431 on the dispensing valve 43. At this moment, the 
gravity of the detergent in the transparent detergent container 41 is 
balanced with the atmosphere pressure, and therefore the detergent is 
prohibited from flowing out of the detergent container 41 further. 
Referring to FIG. 8, when water level rises and touches the bottom of the 
dispensing valve 43, air in the first air chamber 421 (on the dispensing 
cap 42) and the second air chamber 432 (on the dispensing valve 43) is 
forced to compress the preservation chamber 436 causing the detergent in 
the preservation chamber 436 to drop from elevation 422 to elevation 423, 
and therefore an equal amount of the detergent is forced to flow out of 
the dispensing cap 42 through the through hole 420 into the water 
container 2 for mixing with water. When a fixed amount of the detergent is 
driven out of the dispensing cap 42, an equal amount of air is forced to 
flow from the first and second air chambers 421, 432 into the detergent 
container 41. When water level keeps moving to elevation 71, then 
elevation 72, and then elevation 73, more air is forced into the detergent 
container. Under this stage, the pressure inside the detergent container 
is still smaller than the atmosphere pressure, and therefore the detergent 
does not flow out of the detergent container 41. 
Referring to FIG. 9, when water level surpasses the water intake hole 431, 
water flows from the water container 2 into the preservation chamber 436 
to mix with the detergent being retained in the preservation chamber 436 
and then continuously flows out of the dispensing cap 42 through the 
through hole 420 into the water container 2 again. Therefore, what is 
contained in the water container 2 in this stage is a detergent solution. 
Referring to FIG. 10, when water flows back from the water container 2 into 
the flush pipe 7, the pressure in the detergent container 41 is relatively 
released, causing a fixed amount of the detergent squeezed out of the 
detergent container 41 through the bottom opening 410 into the 
preservation chamber 436. When a fixed amount of the detergent is squeezed 
out of the detergent container 41 into the preservation chamber 436, the 
residual detergent solution in the preservation chamber 436 is moved out 
of the dispensing cap 42 through the through hole 420 into the water 
container 2. When water level in the water container 2 drops below the 
elevation of the bottom of the detergent dispensing device 4, air is 
allowed to enter the first and second air chambers 421, 432 again, and 
therefore the dispensing valve 43 and the dispensing cap 42 are returned 
to the conditions shown in FIG. 7. 
Referring to FIGS. 2 and 3 again, two (positive and negative) probes 511, 
512 are fastened to the water container 2 to detect water level. When 
water in the water container 2 reaches full water level, the water level 
detecting probes 511, 512 inmediately trigger a control circuit 5 causing 
it to turn on two light emitting devices (for example:LED) 521, 522, a 
buzzer 55, and a DC motor 53. When the DC motor 53 is turned on, the fan 
531 which is mounted on the output shaft of the DC motor 53 is driven to 
send a current of air toward a perfume carrier 3 causing a perfume to be 
spread into the air. The perfume carrier 3 comprises a sponge holder 31 
mounted on the angle base frame 11, a sponge 32 carried on the sponge 
holder 31 and having a guide hole 311, a perfume bottle 34, a connector 
312 connected between the perfume bottle 34 and the guide hole 311 for 
guiding a liquid perfume from the perfume bottle 34 into the sponge holder 
31. Therefore, the sponge 32 frequently sucks in the liquid perfume from 
the sponge holder 31 while the fan 531 sends a current of air toward the 
sponge 32. Power supply for the control circuit 5, the light emitting 
devices 521, 522 and the motor 53, is provided from a battery box 54. The 
battery box 54 and the control circuit 5 as well as the DC motor 53 are 
mounted on the vertical wall of the angle base frame 11. 
Referring to FIGS. 4 and 5, the control circuit 5 comprises a water level 
detector unit 561, a system time sequencing unit 562, a logic control unit 
563, a time counting unit 564, a motor drive control unit 565, and an 
instruction control unit 566. The water level detector unit 561 is 
controlled by the probes 511, 512 to send a signal to the system time 
sequencing unit 562. During the test of the system, the water level 
detector unit 561 can be driven to give a signal to the system time 
sequencing unit 562 by means of the control of a press button switch 13, 
which is mounted on the angle base frame 11 at the bottom and extended to 
the outside of the housing 1 (see FIG. 2). When triggered, the control 
circuit 5 is caused to reset, and the system time sequencing unit 562 
immediately sends a signal to the time counting unit 564 and the logic 
control unit 563. Upon receipt of the signal from the system time 
sequencing unit 562, the time counting unit 564 tuns on the DC motor 53 
and starts count time, and at the same time, the logic control unit 563 
gives an instruction to turn on the light emitting devices 521, 522 and 
the buzzers 55 for a predetermined length of time. When time is up (for 
example: 5 minutes after counting), the time counting unit 564 stops from 
counting, and the DC motor 53 is stopped, and therefore the system returns 
to the reset mode for next operation. 
Referring to FIG. 6, therein shown is the time sequencing chart of the 
control circuit 5. When the water level detector unit 561 is started, the 
light emitting devices 521, 522 are triggered to flash alternatively, the 
buzzer 55 is triggered to give an audible signal, and the DC motor 53 is 
driven to operate for 5 minutes.