Electromagnetic focusing type shock wave device

Abstract

The utility model discloses an electromagnetic focusing type shock wave device, which comprises a control module, a treatment head, a power supply, a discharge circuit and an absorption circuit, and is characterized in that the discharge circuit comprises a thyristor, a first diode and a discharge capacitor of which two ends are respectively connected with an anode and a cathode of the power supply; an anode of the thyristor is connected with a first end of the discharge capacitor, an anode of the power supply and a cathode of the first diode, a control electrode of the thyristor is connected with the control module, a cathode of the thyristor is connected with one end of an inductance coil of the treatment head, and the other end of the inductance coil of the treatment head, a second end of the discharge capacitor and a cathode of the power supply are grounded. The absorption circuit comprises at least one absorption resistor group, the absorption resistor group comprises at least two absorption resistors which are connected in series, and the anode of the first diode is connected with the cathode of the thyristor through the absorption resistor group. According to the electromagnetic focusing type shock wave device, the absorption resistor group is connected in series with the anode of the first diode which is connected in parallel with the thyristor of the discharge circuit, so that oscillation waveforms are absorbed, and the temperature rise of the device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shock wave devices, in particular to an electromagnetic focusing shock wave device. Background Art

[0002] In the existing electromagnetic focusing shock wave, thyristors are used to control the discharge, and diodes are connected in parallel with the thyristors. The number of discharge times can reach 5 million times. However, limited by the turn-off time of the high-voltage thyristors, the RLC oscillation pulse cannot be turned off within one cycle, resulting in the current oscillating until it reaches 0. The thyristor cannot be quickly turned off during the complete oscillation time, causing the PN junction of the thyristor to be in a conducting state all the time, increasing the junction temperature and making the thyristor prone to damage. Moreover, the subsequent several current waveforms will continuously do work on the cable and the treatment head, increasing the temperature of the cable and the treatment head and affecting the lifespan of the entire treatment head. In addition, the subsequent several waveforms will cause the diaphragm to vibrate, resulting in many additional shock oscillation waves. These oscillation waves have no effect on the treatment and will instead affect the treatment effect. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an electromagnetic focusing shock wave device to absorb redundant waveforms and protect the thyristors.

[0004] To solve the above technical problem, the purpose of the utility model is achieved through the following technical solutions: An electromagnetic focusing shock wave device is provided, which includes a control module, a treatment head, a power supply, a discharge circuit and an absorption circuit. The discharge circuit includes a discharge capacitor, a thyristor and a first diode. The first end and the second end of the discharge capacitor are respectively connected to the positive electrode and the negative electrode of the power supply. The anode of the thyristor is connected to the first end of the discharge capacitor, the positive electrode of the power supply and the cathode of the first diode. The control electrode of the thyristor is connected to the control module. The cathode of the thyristor is connected to one end of the inductance coil of the treatment head. The other end of the inductance coil of the treatment head, the second end of the discharge capacitor and the negative electrode of the power supply are grounded. The absorption circuit includes at least one absorption resistor group, and the absorption resistor group includes at least two absorption resistors connected in series in sequence. The anode of the first diode is connected to the cathode of the thyristor through the absorption resistor group.

[0005] The beneficial technical effects of the present utility model are as follows: In the electromagnetic focusing shock wave device of the present utility model, an absorption resistor group is connected in series to the anode of a first diode connected in parallel with the thyristor of the discharge circuit to absorb the oscillation waveform, thereby reducing the temperature of the treatment head and the cable, increasing the service life of the electromagnetic focusing shock wave device, reducing the temperature rise of the thyristor and the continuous impact of the forward current, increasing the service life of the thyristor, enabling the treatment head to generate only one shock wave, improving the treatment effect, and making the number of treatment shock waves more accurate; moreover, the absorption resistor group includes at least two series-connected absorption resistors, which can reduce the withstand voltage requirements of individual components and can reduce the size of the absorption circuit. Description of the Drawings

[0006] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0007] Figure 1 It is the circuit diagram of the electromagnetic focusing shock wave device provided by the embodiment of the present utility model. Detailed Embodiments

[0008] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0009] Please refer to Figure 1 , Figure 1The circuit diagram of the electromagnetic focusing shock wave device provided by the embodiment of the present utility model. The electromagnetic focusing shock wave device includes a control module, a treatment head 14, a power supply V1, a discharge circuit and an absorption circuit. The discharge circuit includes a discharge capacitor C14, a thyristor Q1 and a first diode D1. The first end and the second end of the discharge capacitor C14 are respectively connected to the positive electrode and the negative electrode of the power supply V1. The anode of the thyristor Q1 is connected to the first end of the discharge capacitor C14, the positive electrode of the power supply V1 and the cathode of the first diode D1. The control electrode of the thyristor Q1 is connected to the control module. The cathode of the thyristor Q1 is connected to one end of the inductance coil L1 of the treatment head 14. The other end of the inductance coil L1 of the treatment head 14, the second end of the discharge capacitor C14 and the negative electrode of the power supply V1 are grounded. The absorption circuit includes at least one absorption resistor group 11. The absorption resistor group 11 includes at least two absorption resistors connected in series in sequence. The anode of the first diode D1 is connected to the cathode of the thyristor Q1 through the absorption resistor group 11. The first diode D1 is connected in parallel with the thyristor Q1. The first end of the absorption resistor at the first position in the absorption resistor group is connected to the anode of the first diode D1, and the second end of the absorption resistor at the last position in the absorption resistor group is connected to the cathode of the thyristor Q1.

[0010] Wherein, the control electrode of the thyristor Q1 is connected to the discharge control pin of the control module to control the operation of the thyristor Q1 through the control module for discharge control. The electromagnetic focusing shock wave device is provided with an absorption resistor group 11 in series with the anode of the first diode D1 connected in parallel with the thyristor Q1 of the discharge circuit to absorb the oscillation waveform. Except for the peak current, the rest of the waveform is consumed by the absorption resistor group 11, thereby reducing the temperature of the treatment head 14 and the cable, improving the service life of the electromagnetic focusing shock wave device, reducing the temperature rise of the thyristor Q1 and the continuous impact of the forward current, improving the service life of the thyristor Q1, and enabling the treatment head 14 to generate only one shock wave, improving the treatment effect, and making the number of treatment shock waves more accurate. Moreover, the absorption resistor group 11 includes at least two absorption resistors connected in series to reduce the withstand voltage requirement of a single component and reduce the size of the absorption circuit.

[0011] Specifically, the number of the absorption resistor groups 11 is three. The three absorption resistor groups 11 are connected in parallel with each other so that each absorption resistor group 11 is respectively connected to the cathode of the thyristor Q1 and the anode of the first diode D1. The number of absorption resistors in each absorption resistor group 11 is two. By providing a plurality of absorption resistor groups 11 connected in parallel with each other, and the absorption resistor group 11 includes at least two absorption resistors connected in series in sequence, the power of each absorption resistor can be shared, and the maximum rated power of the absorption resistor group 11 can be improved.

[0012] Specifically, the absorption resistor uses a wire-wound resistor. Preferably, the wire-wound resistor is an RX21 wire-wound resistor with a power of 30W, so as to be heat-resistant, have a large power, be non-inductive, and avoid bringing noise to the device.

[0013] Specifically, a silicone thermal conductive glue layer is provided on the absorption resistor. Among them, the silicone thermal conductive glue layer can be made of Tianmu silicone thermal conductive glue to better dissipate heat from the absorption resistor.

[0014] Specifically, the electromagnetic focusing shock wave device is provided with a cooling fan FAN1 corresponding to the absorption resistor group 11. The control module includes a single-chip microcomputer U1, and the cooling fan FAN1 is electrically connected to the single-chip microcomputer U1. Among them, by setting the cooling fan FAN1 to perform air-cooling heat dissipation on the absorption resistor group 11, the heat dissipation of the absorption resistor group 11 can be accelerated. The single-chip microcomputer U1 is used to control the start and stop of the cooling fan FAN1, and the rotation speed of the fan can be adjusted through the PWM (Pulse-Width Modulation) control of the single-chip microcomputer U1, so as to realize the control of the cooling fan FAN1 according to requirements and improve the heat dissipation efficiency. The cooling fan FAN1 can be a brushless speed-regulating three-wire fan, so that the cooling fan FAN1 has low noise, a long service life, and low energy consumption. The single-chip microcomputer U1 can be a 32-bit single-chip microcomputer of model HC32F005C6PA.

[0015] Specifically, the electromagnetic focusing shock wave device is provided with a temperature sensor DB1 corresponding to the absorption resistor group 11, and the temperature sensor DB1 is electrically connected to the single-chip microcomputer U1. The temperature sensor DB1 can be a digital temperature sensor of model DS18B20, so as to control the operation of the cooling fan FAN1 by detecting the temperature of the absorption resistor group 11 and combining a preset temperature threshold, which can improve the accuracy of the start and stop control of the cooling fan FAN1, extend the service life of the cooling fan FAN1, and the higher the temperature, the greater the rotation speed of the cooling fan FAN1 that the single-chip microcomputer U1 can control. The preset temperature threshold can be 40°C. Then, when the single-chip microcomputer U1 acquires a temperature exceeding 40°C through the temperature sensor DB1, it controls the cooling fan FAN1 to work and adjusts the rotation speed of the cooling fan FAN1 according to a preset rule after calculating the rotation speed based on the collected temperature.

[0016] Specifically, the absorption circuit further includes an RC circuit 12. The RC circuit 12 includes a capacitor bank 121, a first resistor R12, and a second resistor R13. The first resistor R12 and the second resistor R13 are connected in parallel. The first end of the first resistor R12 is connected to the first end of the second resistor R13, the anode of the thyristor Q1, the first end of the discharge capacitor C14, the positive pole of the power supply V1, and the cathode of the first diode D1. The second end of the first resistor R12 and the second end of the second resistor R13 are connected to the cathode of the thyristor Q1 and one end of the inductance coil L1 of the treatment head 14 through the capacitor bank 121. The capacitor bank 121 includes a number of connection capacitors connected in series in sequence. The first end of the connection capacitor at the first position in the capacitor bank 121 is connected to the second end of the first resistor R12 and the second end of the second resistor R13. The second end of the connection capacitor at the last position in the capacitor bank 121 is connected to the cathode of the thyristor Q1 and one end of the inductance coil L1 of the treatment head 14. Among them, by setting the RC circuit 12 to absorb the spike voltage at the moment when the thyristor Q1 is started, it plays a role in protecting the thyristor Q1. By adopting the way of connecting multiple connection capacitors in series, the capacitor bank 121 can meet the requirements of high voltage resistance and small volume. The connection capacitor can adopt a chip capacitor.

[0017] Specifically, the number of the capacitor banks 121 is four, and the four capacitor banks 121 are connected in parallel with each other. By setting multiple parallel capacitor banks 121, the capacity can be increased, and the capacitor bank 121 includes multiple series-connected connection capacitors, so as to further reduce the size requirements of the absorption circuit.

[0018] Specifically, the number of connection capacitors of each capacitor bank 121 is three.

[0019] Specifically, the electromagnetic focusing shock wave device further includes a protection circuit. The protection circuit includes a varistor bank 13. The varistor bank 13 includes a number of varistors connected in series in sequence. The first end of the varistor at the first position in the varistor bank 13 is connected to the anode of the thyristor Q1, the first end of the discharge capacitor C14, the positive pole of the power supply V1, and the cathode of the first diode D1. The second end of the varistor at the last position in the varistor bank 13 is grounded. Among them, by setting the varistor bank 13 including a number of varistors connected in series in sequence and connected in parallel with the thyristor Q1, the voltage of the discharge circuit is clamped within the required voltage range to prevent the thyristor Q1 from being damaged by overvoltage, playing an overvoltage protection role. The number of varistors in the varistor bank 13 is five. Each varistor can be a 20D102K varistor voltage. The voltage of each varistor is 1 kV, so the voltage of the overall varistor bank 13 can be 5 kV, so that the voltage of the discharge circuit is clamped within 5 kV. The five varistors are R1, R2, R3, R4, and R5 respectively.

[0020] In summary, in the electromagnetic focusing shock wave device of the present utility model, an absorption resistor group is connected in series to the anode of a first diode connected in parallel with the thyristor of the discharge circuit to absorb the oscillation waveform, thereby reducing the temperature of the treatment head and the cable, increasing the service life of the electromagnetic focusing shock wave device, reducing the temperature rise of the thyristor and the continuous impact of the forward current, increasing the service life of the thyristor, enabling the treatment head to generate only one shock wave, improving the treatment effect, and making the number of treatment shock waves more accurate; moreover, the absorption resistor group includes at least two serially connected absorption resistors, which can reduce the withstand voltage requirements of individual components and can reduce the size of the absorption circuit.

[0021] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An electromagnetic focused shock wave device, characterized in that: The invention comprises a control module, a treatment head, a power supply, a discharge circuit and an absorption circuit, wherein the discharge circuit comprises a discharge capacitor, a thyristor and a first diode, wherein the first end and the second end of the discharge capacitor are respectively connected to the positive electrode and the negative electrode of the power supply, the anode of the thyristor is connected to the first end of the discharge capacitor, the positive electrode of the power supply and the cathode of the first diode, the control electrode of the thyristor is connected to the control module, the cathode of the thyristor is connected to one end of the inductor coil of the treatment head, the other end of the inductor coil of the treatment head, the second end of the discharge capacitor and the negative electrode of the power supply are grounded, the absorption circuit comprises at least one absorption resistor group, the absorption resistor group comprises at least two absorption resistors connected in series in sequence, and the anode of the first diode is connected to the cathode of the thyristor through the absorption resistor group.

2. The electromagnetic focused shock wave device according to claim 1, characterized in that: The number of the absorption resistor groups is three, and the three absorption resistor groups are connected in parallel.

3. The electromagnetic focused shock wave device according to claim 1, characterized in that: The absorption resistor is a wire-wound resistor.

4. The electromagnetic focused shock wave device according to claim 3, characterized in that: A silicone heat-conducting adhesive layer is provided on the absorption resistor.

5. The electromagnetic focused shock wave device according to claim 1, characterized in that: The electromagnetic focusing shock wave device is provided with a cooling fan corresponding to the absorption resistor group, the control module includes a single chip microcomputer, and the cooling fan is electrically connected to the single chip microcomputer.

6. The electromagnetic focused shock wave device according to claim 5, characterized in that: The electromagnetic focusing shock wave device is provided with a temperature sensor corresponding to the absorption resistor group, and the temperature sensor is electrically connected to the single chip computer.

7. The electromagnetic focused shock wave device according to claim 1, characterized in that: The absorption circuit also includes an RC circuit, which includes a capacitor group, a first resistor and a second resistor, the first resistor and the second resistor are connected in parallel, the first end of the first resistor is connected to the first end of the second resistor, the anode of the thyristor, the first end of the discharge capacitor, the positive electrode of the power supply and the cathode of the first diode, the second end of the first resistor and the second end of the second resistor are connected to the cathode of the thyristor and one end of the inductor coil of the treatment head through the capacitor group, and the capacitor group includes a plurality of capacitors connected in series in sequence.

8. The electromagnetic focused shock wave device according to claim 7, characterized in that: The number of the capacitor groups is four, and the four capacitor groups are connected in parallel.

9. The electromagnetic focused shock wave device according to claim 7, characterized in that: The number of connected capacitors in each of the capacitor groups is three.

10. The electromagnetic focused shock wave device according to claim 1, characterized in that: The electromagnetic focused shock wave device also includes a protection circuit, which includes a varistor group. The varistor group includes a plurality of varistors connected in series in sequence. The first end of the first varistor in the varistor group is connected to the anode of the thyristor, the first end of the discharge capacitor, the positive electrode of the power supply and the cathode of the first diode, and the second end of the last varistor in the varistor group is grounded.

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