Ultrasonic cleaning box improvement circuit

Abstract

The utility model discloses an ultrasonic cleaning box improvement circuit which comprises a front end circuit and a driving circuit, the front end circuit is suitable for receiving two independent operation signals and independently releasing two independent driving signals, and the driving circuit is suitable for recognizing the two driving signals to control an ultrasonic vibrator to continuously operate. Through the design that release of the two driving signals is controlled by the two independent operation signals respectively, the problem that voltage output fluctuation is large when a single signal is interfered is effectively avoided, and stable output of the ultrasonic vibrator can be effectively improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ultrasonic cleaning boxes, in particular to an ultrasonic cleaning box improved circuit. BACKGROUND

[0002] The ultrasonic cleaning box is a device for cleaning by high-frequency vibration and is widely applied to the fields of precision instruments and medical devices. The application of the ultrasonic field in the market is continuously expanding, and is particularly prominent in the atomization and cleaning industries, and has high commercial value. The traditional circuit has problems of low efficiency and poor voltage stability, which affects the cleaning effect.

[0003] In addition, when the existing ultrasonic cleaning box circuit is switched, the reverse current will generate great interference, and the frequency deviation and output waveform distortion are easily caused due to the low consistency of MOS tubes and slight changes in internal resistance error, so that the ultrasonic cleaning effect is not good, and the quality is uncontrollable. SUMMARY

[0004] The application aims to provide an ultrasonic cleaning box improved circuit.

[0005] To achieve the above purpose, the technical scheme adopted by the application is as follows: an ultrasonic cleaning box improved circuit, comprising a pre-circuit and a driving circuit, the pre-circuit is adapted to receive two independent operation signals and independently release two independent driving signals, and the driving circuit is adapted to identify the two driving signals respectively to control the continuous operation of the ultrasonic vibrator.

[0006] As a preferred, the driving circuit comprises a first bleeder circuit, a second bleeder circuit and a transformer, the first bleeder circuit and the second bleeder circuit are of the same structure, and the first bleeder circuit and the second bleeder circuit are both one-way conduction circuits.

[0007] As a preferred, the pre-circuit comprises a first enable circuit and a second enable circuit, the first enable circuit receives a first operation signal and outputs a first driving signal, and the second enable circuit receives a second operation signal and outputs a second driving signal; the driving circuit comprises a first bleeder circuit, a second bleeder circuit and a transformer, the first bleeder circuit is adapted to receive the first driving signal, the second bleeder circuit is adapted to receive the second driving signal and then pass through the transformer to control the operation of the ultrasonic vibrator.

[0008] As a preferred, the first bleeder circuit comprises a third resistor, a fourth resistor, a first transistor and a sixth diode, the first bleeder circuit forms two branches, and is formed into a one-way conduction by the first transistor and the sixth diode.

[0009] As a preferred, the transformer comprises two primary windings and one secondary winding, and the first and second bleed circuits are connected to different primary windings of the transformer respectively.

[0010] As a preferred, the drive circuit further comprises an output voltage feedback circuit, which is arranged at the transducer output end of the ultrasonic cleaning box.

[0011] As a preferred, the output voltage feedback circuit adopts a resistance voltage division detection circuit.

[0012] As a preferred, the two primary windings are arranged in a sandwich manner at the inner side and the outer side of the secondary winding respectively.

[0013] As a preferred, the drive circuit further comprises a resonance filter circuit, which is arranged at the front end of the transformer.

[0014] As a preferred, the resonance filter circuit comprises an inductor and two capacitors arranged in parallel.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] Through the design of two independent operation signals respectively controlling the release of two drive signals, the problem of large voltage output fluctuation when a single signal is disturbed can be effectively avoided, and the stable output of the ultrasonic transducer can be effectively improved.

[0017] The application adopts a double bleed circuit, which is a one-way conduction circuit. Even if the consistency of the two MOS tubes is not high or there is a slight change in the internal resistance error, the interference can still be eliminated through the reverse non-conduction, thereby ensuring the stability of the ultrasonic output waveform. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a circuit diagram of one embodiment of the application.

[0019] Figure 2 is Figure 1 a schematic diagram of the bleed circuit in

[0020] Figure 3 is Figure 1 a schematic diagram of the pre-circuit in

[0021] Figure 4 is a schematic diagram of the transformer winding.

[0022] Figure 5 is Figure 1 a schematic diagram of the output voltage feedback circuit in

[0023] Figure 6 is Figure 1A schematic diagram of a resonant filter circuit.

[0024] In the figure: 1, resonant filter circuit; 2, transformer; 3, bleeder circuit; 4, output voltage feedback circuit; 5, pre-circuit; Q1, first transistor; Q2, second transistor; D2, second diode; D3, third diode; D4, fourth diode; D6, sixth diode; C2, second capacitor; C4, fourth capacitor; C6, sixth capacitor; C11, eleventh capacitor; C14, fourteenth capacitor; C15, fifteenth capacitor; L1, inductor; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R15, fifteenth resistor; R16, sixteenth resistor; R17, seventeenth resistor; N1, first primary winding; N2, secondary winding; N3, second primary winding; U1, first pre-driver; U3, second pre-driver; JP1, ultrasonic transducer interface end. DETAILED DESCRIPTION

[0025] Hereinafter, the present application will be further described in conjunction with specific embodiments, it should be noted that, in the absence of conflict, the following description of each embodiment or each technical feature can be combined with any other embodiment or technical feature to form a new embodiment.

[0026] In the description of the present application, it should be noted that, for the orientation words, such as the terms "center", "transverse", "vertical", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The orientation and position relationship shown in the drawing is based on the orientation or position relationship, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0027] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0028] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment:

[0030] An improved circuit for an ultrasonic cleaning box, as described in the reference. Figure 1 It includes a preamplifier circuit 5 and a drive circuit. The preamplifier circuit 5 is adapted to receive two independent operating signals and independently release two independent drive signals. The drive circuit is adapted to identify the two drive signals respectively to control the continuous operation of the ultrasonic transducer. The design of controlling the release of the two drive signals separately by two independent operating signals effectively avoids the problem of large voltage output fluctuations when a single signal is interfered with, and can effectively improve the stable output of the ultrasonic transducer.

[0031] Reference Figure 1 , Figure 2 As shown, the driving circuit includes a first discharge circuit, a second discharge circuit, and a transformer. The first and second discharge circuits have the same structure (in this embodiment, the first and second discharge circuits together form discharge circuit 2), and both are unidirectional circuits. Due to the unidirectional conduction characteristic of the first and second discharge circuits, interference generated during switching can be reduced or prevented. Obviously, common dual-push circuits will generate significant interference when encountering reverse current during switching. This interference, combined with the inconsistency of the MOSFETs (corresponding to the first transistor Q1 and the second transistor Q2 in this embodiment) and slight changes in internal resistance error, further leads to frequency deviation and output waveform distortion, resulting in poor ultrasonic cleaning effect and difficulty in controlling quality. This embodiment uses a dual discharge circuit, both of which are unidirectional. Even if the two MOSFETs have inconsistency or slight changes in internal resistance error, the interference can still be eliminated by the reverse non-conductance, and the ultrasonic output waveform is stable.

[0032] Reference Figure 3 As shown, the preamplifier circuit 5 includes a first enable circuit and a second enable circuit. The first enable circuit receives the first running signal PWM-1 and outputs the first drive signal PWM-B by setting the first pre-drive U1. The second enable circuit receives the second running signal PWM-2 and outputs the second drive signal PWM-A by setting the second pre-drive U3. The drive circuit includes a first bleeder circuit, a second bleeder circuit, and a transformer 2. The first bleeder circuit is adapted to receive the first drive signal PWM-B, and the second bleeder circuit is adapted to receive the second drive signal PWM-A, which then passes through the transformer 2 and controls the operation of the ultrasonic transducer.

[0033] Of course, the first enable circuit above also includes a first resistor R1 set at the IN end of the first pre-driver U1, an eighth resistor R8 set between the first resistor R1 and the IN end and grounded, a 12V voltage input at the power supply VCC end of the first pre-driver U1, and a sixth capacitor C6 set at the end and grounded. The second enable circuit similarly also includes a second resistor R2 set at the IN end of the second pre-driver U3, a sixth resistor R6 set between the second resistor R2 and the IN end and grounded. A 12V voltage is input at the power supply VCC end of the second pre-driver U3, and an eleventh capacitor C11 is set at the end and grounded. This design ensures stable transmission of signals and reliable operation of the circuit. In this embodiment, the two enable circuits only provide driving signals independently without interference, which is a common signal amplification circuit, and thus the principle thereof will not be described in detail. The configuration of other elements in the circuit can be adjusted as needed.

[0034] With reference to Figure 4 The transformer 2 includes two primary windings and one secondary winding N2, i.e., a first primary winding N1 and a second primary winding N3. The first bleed circuit and the second bleed circuit are respectively connected to different primary coils of the transformer 2. Preferably, the two primary windings are respectively arranged at the inner side and the outer side of the secondary winding N2 in a sandwich manner. Due to this layout of the transformer 2, heat dissipation of the transformer 2 can be increased, and the conversion efficiency of the transformer 2 can be more stable.

[0035] As Figure 2As shown, the first bleed circuit includes a third resistor R3, a fourth resistor R4, a first transistor Q1 and a sixth diode D6, the first bleed circuit realizes unidirectional conduction through the cooperation of the first transistor Q1 and the sixth diode D6, the first drive signal PWM-B is divided into two branches after passing through the third resistor R3, the first branch amplifies the signal through the first transistor Q1, and the second branch moves reversely through the fourth resistor R4 and the sixth diode D6, and both of the two branches cannot be conducted. The second bleed circuit is the same as the first bleed circuit, which includes a fifth resistor R5, a seventh resistor R7, a second transistor Q2 and a fourth diode D4, and realizes unidirectional conduction through the cooperation of the second transistor Q2 and the fourth diode D4. The diode is the main component for realizing the unidirectional conduction of the first bleed circuit and the second bleed circuit, which can prevent the reverse current during switching from interfering with the circuit, thereby further preventing the greater impact of this interference, the inconsistency of the MOS tube and the internal resistance error and other problems, from another point of view, this also indirectly reduces the requirement for the consistency of the MOS tube, helps to increase the working voltage, so that the ultrasonic vibrator has better cleaning effect. Of course, the sixth diode D6 and the fourth diode D4 in the embodiment can also be selected according to the needs of other circuit structures that can cooperate with the corresponding transistors to realize unidirectional conduction, and the diodes used in the embodiment are only the preferred selection form. On this basis, the duty cycle of the two transistors can be modulated, and the total working time is set to be lower than 80%, so that the working voltage is higher, thereby achieving better cleaning effect.

[0036] As shown in Figure 5 , the drive circuit further includes an output voltage feedback circuit 3, which is arranged at the vibrator output end of the ultrasonic cleaning box, and can be specifically referred to the ultrasonic vibrator interface end JP1 in Figure 5 . Preferably, the output voltage feedback circuit 3 adopts a resistor voltage division type detection circuit. The conventional feedback circuit mainly takes the power of the transformer 2 primary working as the reference condition, and this feedback will cause misjudgment due to the increase of power caused by the increase of frequency when the frequency is increased, so that the correct frequency selection and power increase cannot be realized; the output voltage feedback circuit of the embodiment is as shown in Figure 5As shown in the output end, the second diode D2, the third diode D3, the fifteenth resistor R15, the sixteenth resistor R16, the seventeenth resistor R17, the fourteenth capacitor C14, the fifteenth capacitor C15 are added in the OUT_ADC end to detect feedback, so that the program can monitor the ultrasonic frequency and voltage in real time, so that the frequency of the ultrasonic cleaning box is always in the best resonant frequency range, thereby increasing the cleaning capacity. The second diode D2 and the third diode D3 are used to prevent current reverse interference when switching. The detection circuit used in the embodiment is a common detection circuit, and its specific settings and principles are relatively simple and will not be described again. The difference lies in that it is specifically installed on the output side of the ultrasonic vibrator for real-time monitoring, and the second diode D2 and the third diode D3 are also provided to prevent interference when switching.

[0037] As shown in the output end, the second diode D2, the third diode D3, the fifteenth resistor R15, the sixteenth resistor R16, the seventeenth resistor R17, the fourteenth capacitor C14, the fifteenth capacitor C15 are added in the OUT_ADC end to detect feedback, so that the program can monitor the ultrasonic frequency and voltage in real time, so that the frequency of the ultrasonic cleaning box is always in the best resonant frequency range, thereby increasing the cleaning capacity. The second diode D2 and the third diode D3 are used to prevent current reverse interference when switching. The detection circuit used in the embodiment is a common detection circuit, and its specific settings and principles are relatively simple and will not be described again. The difference lies in that it is specifically installed on the output side of the ultrasonic vibrator for real-time monitoring, and the second diode D2 and the third diode D3 are also provided to prevent interference when switching. Figure 1 、 Figure 6 As shown in the output end, the second diode D2, the third diode D3, the fifteenth resistor R15, the sixteenth resistor R16, the seventeenth resistor R17, the fourteenth capacitor C14, the fifteenth capacitor C15 are added in the OUT_ADC end to detect feedback, so that the program can monitor the ultrasonic frequency and voltage in real time, so that the frequency of the ultrasonic cleaning box is always in the best resonant frequency range, thereby increasing the cleaning capacity. The second diode D2 and the third diode D3 are used to prevent current reverse interference when switching. The detection circuit used in the embodiment is a common detection circuit, and its specific settings and principles are relatively simple and will not be described again. The difference lies in that it is specifically installed on the output side of the ultrasonic vibrator for real-time monitoring, and the second diode D2 and the third diode D3 are also provided to prevent interference when switching.

[0038] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic cleaning tank improvement circuit, comprising: The preamplifier circuit is adapted to receive two independent operation signals and independently release two independent drive signals, and the drive circuit is adapted to identify the two drive signals respectively to control the ultrasonic vibrator to continuously operate.

2. The ultrasonic cleaning tank improvement circuit of claim 1, wherein, The drive circuit comprises a first bleeder circuit, a second bleeder circuit and a transformer, the first bleeder circuit and the second bleeder circuit are of the same structure, and the first bleeder circuit and the second bleeder circuit are unidirectional conduction circuits.

3. The ultrasonic cleaning tank improvement circuit of claim 2, wherein, The preamplifier circuit comprises a first enable circuit and a second enable circuit, the first enable circuit receives a first operation signal and outputs a first drive signal, and the second enable circuit receives a second operation signal and outputs a second drive signal; the drive circuit comprises a first bleeder circuit, a second bleeder circuit and a transformer, the first bleeder circuit is adapted to receive the first drive signal, the second bleeder circuit is adapted to receive the second drive signal and then pass through the transformer and control the ultrasonic vibrator to operate.

4. The ultrasonic cleaning tank improvement circuit of claim 3, wherein, The first bleeder circuit comprises a third resistor, a fourth resistor, a first transistor and a sixth diode, the first bleeder circuit forms two branches, and the first transistor and the sixth diode form unidirectional conduction respectively.

5. The ultrasonic cleaning tank improvement circuit of claim 2, wherein, The transformer comprises two primary windings and one secondary winding, the first bleeder circuit and the second bleeder circuit are connected with different primary coils of the transformer respectively.

6. The ultrasonic cleaning tank improvement circuit of claim 2, wherein, The drive circuit further comprises an output voltage feedback circuit, and the output voltage feedback circuit is arranged at the vibrator output end of the ultrasonic cleaning box.

7. The ultrasonic cleaning tank improvement circuit of claim 6 wherein, The output voltage feedback circuit adopts a resistance voltage division type detection circuit.

8. The ultrasonic cleaning tank improvement circuit of claim 5, wherein, The two primary windings are arranged at the inner side and the outer side of the secondary winding respectively to form a sandwich package.

9. The ultrasonic cleaning tank improvement circuit of claim 2, wherein, The drive circuit further comprises a resonance filter circuit, and the resonance filter circuit is arranged at the front end of the transformer.

10. The ultrasonic cleaning tank improvement circuit of claim 9, wherein, The resonance filter circuit comprises an inductor and two capacitors arranged in parallel.

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