CN-122015065-A - LC induction heating-based steam generation device, ablation equipment and control method

Abstract

The invention discloses a steam generating device, ablation equipment and a control method based on LC induction heating, wherein the device comprises a power control circuit, an LC resonance induction circuit and an induction heating pipe, the output end of the power control circuit is electrically connected with the input end of the LC resonance induction circuit, and the output end of the LC resonance induction circuit is coupled and connected with the induction heating pipe in an electromagnetic induction mode. The invention effectively solves the problems of low heating efficiency and low heating speed of the conventional heating technology of the ablation equipment, can generate sufficient steam in hundreds of milliseconds based on LC induction heating, has the advantages of high response speed, high energy density, non-contact heating, easiness in accurate control and the like compared with the traditional resistance heating, meets the performance requirement of the ablation equipment in clinical practical application scenes, and provides powerful support for the further application of the steam ablation technology in the medical field.

Inventors

• WANG CHAO
• Tao Naihao

Assignees

• 苏州华超医疗科技有限公司

Dates

Publication Date

20260512

Application Date

20251231

Claims (10)

1. 1. A vapor generating device based on LC induction heating, which is characterized by being used in ablation equipment, and comprising a power control circuit, an LC resonance induction circuit and an induction heating pipe; the output end of the LC resonance induction circuit is coupled and connected with the induction heating pipe in an electromagnetic induction mode; the power control circuit is used for generating a PWM control signal and generating a corresponding driving signal according to the PWM control signal; The LC resonance induction circuit is used for receiving the driving signal, generating resonance current in a resonance state according to the driving signal, and generating an alternating magnetic field signal based on resonance current induction; The induction heating pipe is used for generating an eddy current signal for heating liquid to generate steam under the action of the alternating magnetic field signal.
2. 2. The LC induction heating-based vapor generation device of claim 1, further comprising a direct current power supply circuit; the direct current power supply circuit is electrically connected with the input end of the power control circuit and the input end of the LC resonance induction circuit; the direct-current power supply circuit is used for providing working voltage for the power control circuit and is also used for providing direct-current bus voltage for the LC resonance induction circuit.
3. 3. The LC-inductive heating based vapor generating device of claim 2, wherein said LC resonant inductive circuit comprises a feed input leg, a LC resonant output leg, and an inductive coil; The input end of the feed input branch is electrically connected with the output end of the direct current power supply circuit and the output end of the power control circuit, the output end of the feed input branch is electrically connected with the input end of the LC resonance output branch, the output end of the LC resonance output branch is electrically connected with the induction coil, and the induction coil is coupled and connected with the induction heating pipe in an electromagnetic induction mode; the feed input branch is used for receiving the direct current bus voltage output by the direct current power supply circuit and the driving signal output by the power control circuit, and respectively processing the direct current bus voltage and the driving signal to obtain an optimized direct current bus voltage and an optimized driving signal; The LC resonance output branch circuit is used for receiving the optimized DC bus voltage and the optimized driving signal, generating resonance under the action of the optimized DC bus voltage and the optimized driving signal, and generating the resonance current; The induction coil is used for inducing the alternating magnetic field signal under the action of the resonance current.
4. 4. A LC induction heating-based vapor generating device according to claim 3, characterized in that the feed input branch comprises a feed inductance and a parallel capacitance; the first end of the feed inductor is electrically connected with the output end of the direct current power supply circuit, the second end of the feed inductor is electrically connected with the input end of the LC resonance output branch, the second end of the feed inductor is grounded through the parallel capacitor, and the output end of the resonance driving circuit is connected to a common connection end between the second end of the feed inductor and the parallel capacitor.
5. 5. A LC-inductive-heating based vapor generating device according to claim 3, characterized in that the LC resonant output branch comprises a series-connected resonant inductance and resonant capacitance; The first end of the resonant inductor is electrically connected with the output end of the feed input branch, and the second end of the resonant inductor is electrically connected with the induction coil through the resonant capacitor.
6. 6. The LC-inductive heating based vapor generating device of claim 1, wherein said power control circuit comprises a microcontroller and a resonant drive leg; The output end of the microcontroller is electrically connected with the input end of the LC resonance induction circuit through the resonance driving branch circuit; The microcontroller is used for generating the PWM control signal for controlling the LC resonance induction circuit to generate resonance; The resonance driving branch circuit is used for receiving the PWM control signal and generating the corresponding driving signal according to the PWM control signal.
7. 7. The LC-inductive-heating-based vapor generation device of claim 6, wherein said resonant drive leg comprises an isolation chip, a gate drive chip, and a switching tube unit; the input end of the isolation chip is electrically connected with the output end of the microcontroller, and the output end of the isolation chip is electrically connected with the switching tube unit through the grid driving chip; The grid driving chip is specifically a half-bridge driving chip or an H-bridge driving chip.
8. 8. The LC-inductive heating based vapor generation device of claim 6, wherein said power control circuit further comprises a phase detection leg and a phase locked loop leg; the input end of the phase detection branch is electrically connected with the output end of the LC resonance induction circuit, and the output end of the phase detection branch is electrically connected with the input end of the microcontroller through the phase-locked loop branch; the phase detection branch circuit is used for detecting phase change information of the resonance current signal generated by the LC resonance induction circuit and generating a corresponding phase change electric signal according to the phase change information; The phase-locked loop branch is used for receiving the phase change electric signal, generating a phase adjustment signal corresponding to the PWM control signal based on the phase change electric signal, and sending the phase adjustment signal to the microcontroller; The microcontroller is used for receiving the phase adjustment signal and generating a PWM adjustment signal according to the phase adjustment signal.
9. 9. A control method of a LC-based induction heating steam generator, characterized in that it is used for an ablation apparatus to generate steam using the LC-based induction heating steam generator as claimed in any one of claims 1 to 8; The control method comprises the following steps: Generating a PWM control signal by using a power control circuit, and generating a corresponding driving signal according to the PWM control signal; Receiving the driving signal by using an LC resonance induction circuit, generating resonance current in a resonance state according to the driving signal, and generating an alternating magnetic field signal based on resonance current induction; With an induction heating tube, an eddy current signal for heating a liquid to generate steam is generated under the action of an alternating magnetic field signal.
10. 10. An ablation device comprising the LC induction heating-based vapor generating apparatus as recited in any one of claims 1 to 8, further comprising: a liquid delivery device which is communicated with a liquid inlet of the vapor generating device based on LC induction heating through a fluid pipeline and provides liquid for generating vapor for the vapor generating device based on LC induction heating; And the steam output device is communicated with a steam outlet of the steam generating device based on LC induction heating through a steam pipeline and outputs steam generated by the steam generating device based on LC induction heating.

Description

LC induction heating-based steam generation device, ablation equipment and control method Technical Field The invention relates to the technical field of medical equipment, in particular to a steam generation device based on LC induction heating, ablation equipment and a control method. Background In the medical field, steam ablation technology is widely used as an important hyperthermia means in various clinical situations, such as tumor ablation, tissue cutting, hemostasis, and endoluminal treatment. The technology can quickly and controllably act on target tissues to cause protein denaturation and cell coagulation necrosis, thereby achieving the treatment purpose. Compared with other thermal ablation modes, the steam ablation has the advantages of uniform thermal penetration, easy energy control, small damage to surrounding normal tissues and the like, and therefore has remarkable application value in minimally invasive and precise medical treatment. To achieve effective treatment, ablation devices (e.g., portable ablation handles) typically require the generation of sufficient amounts of steam in a very short time (e.g., in hundreds of milliseconds) to meet rapid, focused energy output requirements. The conventional ablation device generally adopts a resistance heating technology to heat so as to generate steam, in the mode, the heating efficiency is low, a large amount of energy is dissipated in the surrounding environment in the form of heat energy in the energy conversion process, so that energy waste is caused, the response speed is low, and a large amount of steam is difficult to generate in a short time at a high enough temperature, so that the requirement of the ablation device for generating sufficient steam in hundreds of milliseconds is difficult to meet. Therefore, there is a need for a more efficient heating technique to improve the steam generator to enhance the performance of the ablation device to make it more suitable for clinical practice. Disclosure of Invention In view of the above, the invention provides a vapor generating device, an ablation device and a control method based on LC induction heating, so as to solve the problems that the heating efficiency is low and the heating speed is low in the existing ablation device heating technology, so that the requirement of sufficient vapor generated by the ablation device in hundreds of milliseconds can not be met. The invention provides a steam generating device based on LC induction heating, which is used in ablation equipment, and comprises a power control circuit, an LC resonance induction circuit and an induction heating pipe; the output end of the LC resonance induction circuit is coupled and connected with the induction heating pipe in an electromagnetic induction mode; the power control circuit is used for generating a PWM control signal and generating a corresponding driving signal according to the PWM control signal; The LC resonance induction circuit is used for receiving the driving signal, generating resonance current in a resonance state according to the driving signal, and generating an alternating magnetic field signal based on resonance current induction; The induction heating pipe is used for generating an eddy current signal for heating liquid to generate steam under the action of the alternating magnetic field signal. Optionally, the steam generating device further comprises a direct current power supply circuit; the direct current power supply circuit is electrically connected with the input end of the power control circuit and the input end of the LC resonance induction circuit; the direct-current power supply circuit is used for providing working voltage for the power control circuit and is also used for providing direct-current bus voltage for the LC resonance induction circuit. Optionally, the LC resonant induction circuit includes a feed input branch, an LC resonant output branch, and an induction coil; The input end of the feed input branch is electrically connected with the output end of the direct current power supply circuit and the output end of the power control circuit, the output end of the feed input branch is electrically connected with the input end of the LC resonance output branch, the output end of the LC resonance output branch is electrically connected with the induction coil, and the induction coil is coupled and connected with the induction heating pipe in an electromagnetic induction mode; the feed input branch is used for receiving the direct current bus voltage output by the direct current power supply circuit and the driving signal output by the power control circuit, and respectively processing the direct current bus voltage and the driving signal to obtain an optimized direct current bus voltage and an optimized driving signal; The LC resonance output branch circuit is used for receiving the optimized DC bus voltage and the optimized driving signal, generating resonance under the action of