JPH11253900A - Ultrasonic washer provided with sound pressure sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic washer in which a sound pressure sensor for detecting ultrasonic waves generated from an ultrasonic vibrator is fitted to a housing. SOLUTION: In this washer, a sensor chamber 7 is constructed near a liquid inflow port 4 of a housing, and a sound pressure sensor 8 is fitted in the sensor chamber 7 to detect sound pressure of ultrasonic waves generated from an ultrasonic vibrator 3 to indicate it by a voltmeter 10, thereby enabling detecting the deterioration of the ultrasonic vibrator. Also a signal from the sound pressure sensor 8 is amplified by a receiving circuit 9 to input it to a comparison circuit, and there, it is compared with an outlet level set in advance by a setting circuit, and when that the output of the sound sensor 8 has become smaller is detected, a control circuit stops the output of a high frequency oscillator 6 and a buzzer is sounded. In this way, the deterioration of the ultrasonic vibrator and the presence or absence of liquid caused to flow in the liquid inflow port 4 can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic washer with a sound pressure sensor in which a sound pressure sensor for detecting ultrasonic waves generated from an ultrasonic transducer is mounted on a housing.

[0002]

2. Description of the Related Art Conventionally, in order to detect ultrasonic waves generated from an ultrasonic cleaner, a sound pressure sensor for detecting a liquid flowing out from a nozzle opening of a housing of the ultrasonic cleaner is mounted. The output is detected by a voltage meter or the like.

[0003]

However, as described above, the sound pressure sensor is formed separately from the ultrasonic cleaner,
Further, since the sensor itself has a large configuration, there is a problem that a large mounting space is required.

[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, a sound pressure sensor is mounted in the sensor chamber, and a signal from the ultrasonic vibrator is provided. By receiving the ultrasonic wave and displaying the ultrasonic wave on the voltmeter, the generation of the ultrasonic wave from the ultrasonic vibrator and the stop of the liquid supply in the housing are detected.

[0005]

According to the present invention, a sensor chamber is formed in the housing on the side of the liquid inlet, a sound pressure sensor is mounted in the sensor chamber, and ultrasonic waves generated from the ultrasonic vibrator are detected by the sound pressure sensor. By displaying the detected sound pressure with a meter such as a voltmeter, it is possible to detect whether or not ultrasonic waves are being generated from the ultrasonic vibrator. If the output of the sound pressure sensor is smaller than the set voltage level, it is detected that the ultrasonic transducer has deteriorated or liquid is not supplied into the housing if the output of the sound pressure sensor is smaller than the set voltage level. The output of the comparison circuit can be input to the control circuit, the output of the high-frequency oscillator can be stopped, and an alarm can be given by a buzzer.

[0006]

FIG. 1 is a side sectional view of a mounting member of an ultrasonic cleaner according to one embodiment of the present invention. An ultrasonic vibrator 3 is mounted on a stepped portion 1a of a housing 1 via a packing 2, and ,
The liquid inlet 4 is mounted on the housing 1 near the stepped portion 1a, and the ultrasonic oscillator 3 is supplied with an oscillating output from a high frequency oscillator 6 provided outside via a lead wire 5, and the liquid in the housing 1 is provided. A sensor room 7 is provided on the side of the inflow port 4, a sound pressure sensor 8 is mounted in the sensor room 7, a receiving circuit 9 is connected to the sound pressure sensor 8, and a voltmeter 10 is connected to the receiving circuit 9. Have been.

[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. The ultrasonic waves are emitted together with the liquid from the nozzle port 1a of the housing 1 and the ultrasonic waves generated from the ultrasonic vibrator 3 are detected by the sound pressure sensor 8 and received by the sound pressure sensor 8. The received sound pressure signal is amplified by the receiving circuit 9 and input to the voltmeter 10. By monitoring the voltage value of the voltmeter 10, the ultrasonic vibrator 3 generates an ultrasonic wave having a normal sound pressure. Can be detected.

FIG. 2 is a block diagram of a sound pressure detecting circuit according to another embodiment of the present invention. As shown by a dotted line in FIG. Is amplified by the receiving circuit 9 and input to the comparing circuit 11, and the comparing circuit 11 receives a preset voltage from the setting circuit 12 and constantly compares the output from the sound pressure sensor 8. Further, the output of the comparison circuit 11 is input to the control circuit 13, and the output of the control circuit 13 is
And the buzzer 14.

In this embodiment, the sound pressure of the ultrasonic wave from the ultrasonic vibrator 3 is detected by the sound pressure sensor 8, and the output of the sound pressure sensor 8 is amplified by the receiving circuit 9 to be compared with the comparison circuit. When the ultrasonic vibrator 3 is degraded or the liquid is not supplied from the liquid inlet 4 into the housing 1, the sound pressure is The output of the sensor 8 is the setting circuit 1
When the output from the control circuit 13 is detected to be lower than the voltage level from the control circuit 13, the output from the comparison circuit 12 is input to the control circuit 13, and the output from the high-frequency oscillator 6 is stopped. In addition, it is possible to warn of an abnormality of the ultrasonic vibrator 3 or a stop of the liquid.

[0010]

As described above, in the ultrasonic cleaner according to the present invention, a sensor chamber is formed near the liquid inlet of the housing, and a sound pressure sensor is mounted in the sensor chamber to generate the ultrasonic wave from the ultrasonic vibrator. By detecting the sound pressure of the ultrasonic wave to be displayed and displaying it on a voltmeter, it is possible to detect the deterioration of the ultrasonic transducer, and the signal from the sound pressure sensor is amplified by the receiving circuit and input to the comparison circuit. When the setting circuit detects that the output of the sound pressure sensor has become smaller than the output level set in advance, the control circuit stops the output of the high-frequency oscillator and sounds a buzzer, thereby causing the ultrasonic vibrator to operate. There is an advantage that deterioration and presence / absence of liquid flowing into the liquid inlet can be detected.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an ultrasonic cleaning machine according to one embodiment of the present invention.

FIG. 2 is a block diagram of an ultrasonic cleaner according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Packing 3 Ultrasonic vibrator 4 Liquid inlet 5 Lead wire 6 Oscillator 7 Sensor room 8 Sound pressure sensor 9 Receiving circuit 10 Voltmeter 11 Comparison circuit 12 Setting circuit 13 Control circuit 14 Buzzer

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 described above, a sensor chamber is formed on the side of the liquid inlet of the housing, a sound pressure sensor is mounted in the sensor chamber, and a voltmeter is received by receiving ultrasonic waves from the ultrasonic vibrator. An ultrasonic cleaner with a sound pressure sensor for detecting the generation of ultrasonic waves from the ultrasonic vibrator and the stoppage of liquid supply in the housing by displaying the following. 2. A receiving circuit for amplifying a sound pressure signal received by the sound pressure sensor, a comparing circuit for comparing a sound pressure signal from the receiving circuit with a signal set in advance by a setting circuit, 2. The ultrasonic cleaning machine with a sound pressure sensor according to claim 1, further comprising a control circuit for stopping an output of a high-frequency oscillator that supplies a high-frequency output to the ultrasonic transducer when an output signal is input.