JPH11253899A - Ultrasonic washer provided with liquid supply stopping sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic washer provided with liquid supply stopping sensor to which an ultrasonic sensor for detecting that liquid supply into a housing is stopped and a lot of bubbles are generated in liquid is fitted. SOLUTION: In this washer, a sensor chamber 10 is constructed near a liquid inflow port 4 of a housing and an ultrasonic sensor 11 is fitted to an ultrasonic sensor fitting part 10 to detect the presence and absence of liquid caused to flow in the liquid inflow port 4 and a lot of bubbles contained in liquid. In this way, an oscillator for applying an oscillation signal to an ultrasonic vibrator is stopped to enable preventing the breakage of the ultrasonic vibrator due to liquid supply stoppage and a lot of bubbles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic cleaner having a liquid supply stop sensor equipped with an ultrasonic sensor for detecting that the supply of a liquid is stopped in a housing and that a large amount of bubbles are generated in the liquid. Things.

[0002]

2. Description of the Related Art As shown in FIG. 3, an ultrasonic vibrator 3 is mounted on a stepped portion 1a inside a housing 1 via a packing 2, as shown in FIG. Nozzle port 1 at the end of housing 1 facing the radiation surface of
b, and a liquid inlet 4 is mounted on the side of the housing 1, and an oscillator 6 provided outside via a lead wire 5.
By applying an oscillation signal to the ultrasonic transducer 3 from
Ultrasonic waves are generated from the ultrasonic vibrator 3, and the liquid supplied from the tank 7 flows in from the liquid inflow port 4, so that the ultrasonic wave is put on the inflowing liquid and flows out from the nozzle port 1 b. The nozzle liquid 1b is
The object to be cleaned provided on the front surface of the device can be cleaned.

[0003]

By the way, in such an ultrasonic cleaning machine, in order to detect whether or not the liquid is supplied to the liquid inlet 4, the liquid inlet 4 and the tank 7 are used.
During the time when the flow sensor 8 detects the flow of the liquid, the flow sensor 8 is connected.
, The output signal is applied to the control circuit 9, and the stop signal is not applied to the oscillator 5 from the control device 9. Therefore, the ultrasonic cleaner is operating, but if the distance between the liquid inlet 4 and the flow sensor 8 is long, Even if an output signal is applied from the flow sensor 8 to the control circuit 9, no liquid is supplied to the liquid inlet 4 and the liquid in the housing 1 becomes empty, and the ultrasonic vibrator 3 is operated in that state. In this case, the ultrasonic vibrator 3 may be broken or broken, and the flow sensor 8 cannot detect bubbles.

[0004]

According to the present invention, there is provided a housing having a nozzle port formed at an end thereof, a stepped portion formed in an intermediate portion, and a liquid inlet provided near the stepped portion. An ultrasonic vibrator mounted on the stepped portion of the housing via a packing, in which a liquid flows in from the liquid inflow port, and the liquid flows out of the nozzle port together with the ultrasonic wave and is provided near the nozzle port. In the ultrasonic cleaning machine configured to clean the object to be cleaned, a sensor chamber is formed on a side of the liquid inlet of the housing, and an ultrasonic sensor is attached to the sensor chamber to be in the vicinity of the liquid inlet. Ultrasonic waves are irradiated, and the supply of liquid in the housing is stopped and a large amount of bubbles are detected from the reflected echoes of the ultrasonic waves.

[0005]

In the present invention, a sensor chamber is formed in the housing on the side of the liquid inlet, and an ultrasonic turbulence sensor is mounted in the sensor chamber, and the ultrasonic wave is applied to the liquid flowing from the liquid inlet by the ultrasonic sensor. By irradiating, when the reflected echo of the irradiated ultrasonic wave is detected by the ultrasonic sensor, the liquid is supplied from the liquid inlet, but the reflected echo is not detected or the intensity of the reflected echo is detected. When it is detected that the liquid has become low, it can be detected that the liquid is not supplied from the liquid inlet or that a large amount of bubbles are contained in the liquid that has flowed.

[0006]

FIG. 1 is a side sectional view of a mounting member of an ultrasonic cleaning machine according to one embodiment of the present invention. FIG. 2 is a block diagram of a liquid detection circuit according to one embodiment of the present invention. The packing, 3 is an ultrasonic oscillator, 4 is a liquid inlet, 5 is a lead wire, 6 is a high-frequency oscillator, 9 is a control circuit, and these components are the same as those in the above-mentioned conventional example. In the present embodiment, a sensor chamber 10 is provided on the side of the liquid inlet 4 of the housing 1, and an ultrasonic sensor 11 is mounted in the sensor chamber 10, and the ultrasonic sensor 11 receives a pulse through a lead wire 11a. Connected to the oscillator 12, a continuous pulse signal is applied from the pulse oscillator 12 to constantly irradiate the inside of the housing 1 with an ultrasonic wave. The reflected echo is detected by the ultrasonic sensor 11, and the reflected echo signal is amplified by the receiving circuit 13. Been Is input to 較回 path 14, also,
The comparator 14 receives a preset level signal from the setting circuit 15 and compares it with the reflected echo signal from the receiver 13. The output signal of the comparator 14 is input to the control circuit 9 and the control circuit 9 Is input to the high-frequency oscillator 6.

[0007] In the ultrasonic cleaning machine of the present embodiment configured as described above, liquid is normally supplied from the liquid inlet 4, and ultrasonic waves are transmitted from the ultrasonic vibrator 3 by the oscillation output from the high-frequency oscillator 6 to the housing 1. And the ultrasonic waves are discharged from the nozzle port 1a of the housing 1 together with the liquid.
The ultrasonic sensor 11 irradiates the inside of the housing 1 with an ultrasonic pulse indicating that the liquid is flowing into the housing 1 from the liquid inflow port 4, and detects the reflected echo from the side wall of the housing 1 to enter the housing 1. Detects whether liquid is being supplied.

If the liquid stops flowing from the liquid inlet 4 or a large amount of bubbles are generated, the level of the reflected echo pulse detected by the ultrasonic sensor 11 becomes low. Amplifying the reflected echo pulse signal detected by the receiving circuit 13 in the receiving circuit 13
When the level of the reflected echo pulse signal is detected to be low by comparing with the signal level set by the setting circuit 15, an output signal is output from the comparing circuit 14 to the control circuit 9, whereby the control is performed. The stop signal is output from the circuit 9 to the oscillator 6, the oscillator 6 is stopped, and the ultrasonic transducer 3 can be prevented from being damaged.

In this embodiment, the housing 1
The ultrasonic sensor 11 is mounted on the sensor chamber 10 provided in the housing 1, and the liquid flowing from the liquid inlet 4 into the housing 1 is directly detected, whereby no liquid is supplied or a large amount of bubbles are generated in the liquid. The oscillator 6 is stopped immediately after the supply of liquid is stopped and the number of bubbles is detected, and the signal applied to the ultrasonic vibrator 3 is stopped. Damage to the vibrator 3 can be prevented beforehand.

[0010]

As described above, in the ultrasonic cleaning machine according to the present invention, the sensor chamber is formed near the liquid inlet of the housing, and the ultrasonic sensor is mounted in the sensor chamber, and the ultrasonic chamber flows into the liquid inlet. The oscillator that applies an oscillating signal to the ultrasonic vibrator is stopped by detecting the presence or absence of liquid and a large amount of bubbles containing liquid. There is an advantage that breakage of the can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an ultrasonic cleaner according to one embodiment of the present invention.

FIG. 2 is a block diagram of a liquid detection circuit of the ultrasonic cleaning machine according to one embodiment of the present invention.

FIG. 3 is a configuration diagram of a conventional ultrasonic cleaning machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Packing 3 Ultrasonic vibrator 4 Liquid inlet 5 Lead wire 6 Oscillator 9 Control circuit 10 Ultrasonic sensor mounting part 11 Lead wire 12 Pulse oscillator 13 Receiving circuit 14 Comparison circuit 15 Setting circuit

Claims (2)

[Claims] 1. A housing in which a nozzle port is formed at an end, a stepped portion is formed in the middle inside, and a liquid inlet is mounted near the stepped portion, and a housing is provided in the stepped portion of the housing. An ultrasonic vibrator mounted through a packing, for allowing a liquid to flow in from the liquid inlet, flowing out the liquid together with the ultrasonic wave from the nozzle port, and cleaning an object to be cleaned provided in the vicinity of the nozzle port. In the ultrasonic cleaner, a sensor chamber is formed on the side of the liquid inlet of the housing, an ultrasonic sensor is mounted in the sensor chamber, and ultrasonic waves are irradiated near the liquid inlet, and the ultrasonic chamber is irradiated with the ultrasonic wave. An ultrasonic cleaner with a liquid supply stop sensor, wherein the liquid supply stop and a large amount of bubbles in the housing are detected from a reflected echo of a sound wave. 2. A pulse oscillator for supplying a pulse signal to the ultrasonic sensor, a receiving circuit for receiving a reflected echo signal from the ultrasonic sensor, and a reflected echo signal from the receiving circuit and a setting circuit set in advance. And a control circuit for stopping an output of a high-frequency oscillator that supplies a high-frequency output to the ultrasonic vibrator when an output signal of the comparison circuit is input. Item 7. An ultrasonic cleaner with a liquid supply stop sensor according to item 1.