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Multi-sensor, driving and control function integrated full-automatic intelligent skin cryotherapy liquid nitrogen gun and control method thereof

A multi-sensor, control function technology, applied in the field of medical devices, can solve the problems affecting the treatment efficiency and treatment effect of liquid nitrogen cryotherapy, low accuracy of liquid nitrogen flow control, liquid nitrogen waste, etc., so as to improve treatment efficiency and treatment effect , realize automation and intelligence, and facilitate the effect of filling liquid nitrogen

Active Publication Date: 2022-03-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a fully automatic intelligent skin cryotherapy liquid nitrogen gun with integrated multi-sensor, drive and control functions and its control method, so as to solve the problem that the original liquid nitrogen cryotherapy device proposed in the background technology is manually operated. Operation or semi-automatic operation has the problem of low accuracy of liquid nitrogen flow control and waste of liquid nitrogen, which affects the treatment efficiency and therapeutic effect of liquid nitrogen cryotherapy

Method used

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  • Multi-sensor, driving and control function integrated full-automatic intelligent skin cryotherapy liquid nitrogen gun and control method thereof
  • Multi-sensor, driving and control function integrated full-automatic intelligent skin cryotherapy liquid nitrogen gun and control method thereof
  • Multi-sensor, driving and control function integrated full-automatic intelligent skin cryotherapy liquid nitrogen gun and control method thereof

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specific Embodiment approach 1

[0030] Specific implementation mode one: as Figure 1-20 As shown, a fully automatic intelligent skin cryotherapy liquid nitrogen gun with multi-sensors, drive and control functions integrated in the present invention includes a nozzle 1, a liquid nitrogen container, an opening adjustment unit, a heat transfer adjustment unit, a vent Pressure mechanism and sensor group; the opening adjustment unit is used to adjust the opening area of ​​the liquid nitrogen container container cover according to the deviation between the actual flow rate of liquid nitrogen and / or nitrogen gas and the target flow rate to control the flow rate of liquid nitrogen and / or nitrogen gas at the nozzle nozzle; the sensor group Including micro-turbine flowmeter 2, multiple temperature sensors, and multiple air pressure sensors; micro-turbine flowmeter 2 is installed on the opening adjustment unit for measuring the nitrogen flow at the inlet of nozzle 1 as feedback for closed-loop control; multiple tempera...

specific Embodiment approach 2

[0034] Specific implementation mode two: as Figure 1-2 and Figure 19 As shown, in this embodiment, the liquid nitrogen container includes a container cover 4, a sealing ring 6 and a main body of the liquid nitrogen container, and the container cover 4 is assembled on the opening of the main body of the liquid nitrogen container through the sealing ring 6; the main body of the liquid nitrogen container includes Inner tank 7, heat exchange spiral plate 8, and shell 10, heat exchange spiral plate 8 is installed between inner tank 7 and shell 10, heat exchange spiral plate 8 makes the annular space between inner tank 7 and shell 10 form a spiral shape Air circulation and heat transfer channels 9 (heat exchange spiral plate 8 is installed between the inner tank 7 and the outer shell 10, and the heat exchange spiral plate 8 makes the air in the inner tank 7 and the outer shell 10 spiral downward), and the container cover 4 is installed A liquid nitrogen injection pipe 37 and a li...

specific Embodiment approach 3

[0035] Specific implementation mode three: as Figure 1-5 , Figure 9-12 as well as Figure 20 As shown, in this embodiment, the opening adjustment unit includes a motor 28, a motor bracket 29, a rocker 30, a flange 31, a group of blades 32, an initial position limit switch 34 and a limit position limit switch 35; the motor bracket 29 Installed on the container cover 4 by bolts, the motor 28 is installed from the bottom of the motor bracket 29; the rocker 30 includes a blade control ring 30-1, a fan ring 30-2, a limit switch touch end 30-3, and a blade control ring 30-1 is located between the limit switch touch end 30-3 and the fan ring 30-2, and the three are connected together or integrally formed, and the inner wall of the outer ring of the fan ring 30-2 is provided with internal teeth; the flange 31 A regular polygonal chute 31-1 with the number of sides consistent with the number of blades 32 is provided on the end face of the boss, and the flange 31 is provided with a ...

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Abstract

The invention discloses a multi-sensor, driving and control function integrated full-automatic intelligent skin cryotherapy liquid nitrogen gun and a control method thereof, and belongs to medical instruments for liquid nitrogen low-temperature cryotherapy. The problems that in the prior art, liquid nitrogen flow control accuracy is low, and liquid nitrogen is wasted are solved. The opening adjusting unit adjusts the opening area according to the deviation between the actual nitrogen flow and the target flow so as to adjust the nitrogen flow at the nozzle. The micro turbine flowmeter measures nitrogen flow as feedback for closed-loop control. The heat transfer adjusting unit transfers heat required by liquid nitrogen vaporization into the system by controlling air flow of the heat transfer layer. When the liquid nitrogen gun starts to work, the electromagnetic valve is opened, the micro vacuum pump pumps out low-temperature air and pumps outside normal-temperature air into the heat transfer layer, and heat transfer adjustment is achieved; when the liquid nitrogen gun receives a work stopping signal, the electromagnetic valve is closed, the micro vacuum pump continuously pumps out air in the heat transfer layer until the pressure of the heat transfer layer reaches a specified value, the micro vacuum pump stops working, the heat transfer layer is in negative pressure, heat transferred to liquid nitrogen is reduced, and waste is reduced.

Description

technical field [0001] The invention relates to a fully automatic intelligent skin cryotherapy liquid nitrogen gun and a control method thereof, belonging to medical equipment, in particular to medical equipment for liquid nitrogen cryotherapy. Background technique [0002] Liquid nitrogen gun, also known as liquid nitrogen cryotherapy instrument, is a device used to implement cryotherapy. Liquid nitrogen cryotherapy is the use of low temperature generated by liquid nitrogen to cause necrosis of diseased tissue and achieve the purpose of treatment. The therapeutic effect of liquid nitrogen cryotherapy on flat warts, molluscum contagiosum, keloids, chronic eczema, neurodermatitis, corns, lichen planus, prurigo, seborrheic dermatitis and other skin diseases. Existing liquid nitrogen cryotherapy medical devices have a variety of different models and specifications, which can be mainly divided into two categories: contact and non-contact cryotherapy devices. The contact liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/02
CPCA61B18/02A61B2018/0268A61B2018/00744
Inventor 吴伟国刘凤坤
Owner HARBIN INST OF TECH
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