CN2603663Y

CN2603663Y - Liquid air cryotherapy machine

Info

Publication number: CN2603663Y
Application number: CN 03235121
Authority: CN
Inventors: 戴宗晴; 孙德明
Original assignee: SHIYAN KANGBAO SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: SHIYAN KANGBAO SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2003-01-03
Filing date: 2003-01-03
Publication date: 2004-02-18
Anticipated expiration: 2013-01-03

Abstract

The utility model relates to a liquid gas cryotherapy machine, including a pressure gas cylinder, a drierstrainers, a control valve, an air intake manifold line and returning air line, a freezing needle, each part is connected by the catheters, and the utility model is characterized in that: the air intake manifold line is provided with a precooler which is installed with low temperature medium, the needle shank is installed with the temperature sensors; or the returning air line is installed with the temperature sensors. The liquid gas cryotherapy machine has the advantages of low temperature of liquid nitrogen refrigerating, as well as quick reaction, good operability of gas throttle refrigerating; the utility model can reach very low temperature under lower pressure, the system has good reliability and high safety, and can be used to treat various tumor diseases, etc.

Description

Therapy apparatus is frozen in liquid air cooling

Technical field: this utility model relates to a kind of liquid air cooling that is used for medical treatment and freezes therapy apparatus.

Background technology: the cold therapy machine that is used for medical treatment at present mainly contains two kinds, and a kind of is to utilize the gases at high pressure throttling to produce low temperature, i.e. joule---Thomson effect; A kind of is to utilize liquid nitrogen to produce low temperature in cold head gasification heat absorption.The reaction of gas throttling refrigeration is fast, but needs very high pressure, and then the cold head temperature is low inadequately inadequately as pressure, and it is very big that the too high then parts of pressure are made difficulty of processing, and controlled and safety are had very high requirement; Utilize the liquid nitrogen refrigerating temperature low, but because liquid nitrogen constantly heat absorption vaporization when in system pipeline, transmit, the arrival cold head needs the long period, and to the operational order sluggish, controllability is poor.

Summary of the invention: the problem that this utility model can not be taken into account for the temperature that solves existing cold therapy machine and exist and speed, propose a kind of liquid air cooling and freeze therapy apparatus, comprise pressure cylinder, device for drying and filtering, control valve, advance return line, freezing pin, described each several part is connected by conduit, it is characterized in that: described air inlet pipeline is provided with the precooler that cryogenic media is housed, and described syringe needle shank is equipped with temperature sensor; Perhaps on described return line, temperature sensor is housed.Therapy apparatus is frozen in this liquid air cooling promptly has the liquid nitrogen refrigerating temperature low, has the gas throttling refrigeration to react characteristics fast, good operability again; Its cryogenic temperature can reach-196 ℃; Can reach very low temperature under lower pressure, system reliability is good safe, is used for the treatment of diseases such as various tumors.

Description of drawings: Fig. 1 is the structural principle sketch map of this utility model liquid air cooling freezing therapy apparatus;

Fig. 2 is the schematic representation of apparatus that this utility model air inlet pipe immerses the liquid nitrogen pre-cooling;

Fig. 3 is the schematic representation of apparatus that this utility model air inlet pipe does not immerse the liquid nitrogen pre-cooling;

Fig. 4 is the sketch map of freezing syringe needle of the present utility model.

The specific embodiment: as shown in Figure 1, this cold therapy machine comprises pressure cylinder, device for drying and filtering, control valve, advances return line, freezing pin, each part mentioned above is connected by conduit, on air inlet pipeline, also be provided with the precooler that cryogenic media is housed, on syringe needle shank or the return line temperature sensor be housed.Its operation principle is, gases at high pressure in the gas cylinder 1 reduce to required pressure through pressure valve 2, drying filter 3 removes impurity moisture, open freezing valve 10 when freezing, after gas is reduced to lower temperature by precooler 9, enter freezing syringe needle 6 and spray throttling, further be cooled to temperature required, low-temp low-pressure gas after the throttling enters atmosphere through syringe needle shank 16 and muffler 14, returning can be further to the further pre-cooling of the gases at high pressure in the air inlet pipe 15 in the way, Pressure gauge 8 is used for follow-up work pressure, and freezing finishing closed freezing valve 10.Needs according to the treatment tumor, be provided with the rapid rewarming system, promptly go back and connect heating rewarming pipeline at air inlet pipeline 7, when needs heating rewarming, open electric heater 4 earlier, open heating rewarming valve 5 again, gas enters syringe needle 6 after being heated by heater 4, syringe needle 6 temperature raise rapidly, are convenient to further kill tumor and extract syringe needle.As shown in Figure 4, after gases at high pressure spray throttling by pipe 18 in air induction hose 15, the syringe needle to interior pipe front end aperture, temperature and pressure reduces rapidly, and the low-pressure gas after the throttling returns through syringe needle outer tube 19 inner chambers, syringe needle shank 16 and return-air flexible pipe 14, enters atmosphere at last.To the gases at high pressure pre-cooling of further lowering the temperature, temperature sensor 17 is used to measure cold-gas temperature during this time.

Precooler 9 structures are seen shown in Figure 2, are made up of Dewar bottle 12 that fills liquid nitrogen and appendix 11, and appendix 11 lower end curls or plate-like immerse in the liquid nitrogen, and appendix 11 liftables immerse the degree of depth of liquid nitrogen in order to control.But also can not immerse in the liquid nitrogen as required, this moment structure see shown in Figure 3, bucket 13 in Dewar bottle 12, being provided with in, in liquid nitrogen leaves in the bucket 13, barrel 13 peripheries in appendix 11 is wrapped in.In order to improve heat exchanger effectiveness, can in the cannelure 20 between interior bucket 13 and the Dewar bottle 12, inject saline.

This cold therapy machine is before mesohigh gas throttling refrigeration, utilize the pre-cold air of liquid nitrogen, make it to reach lower temperature, and then carry out throttling refrigeration at cold head, to reach very low temperature, owing to adopted the way of pre-cooling, so need not just can reach very low throttle temperature by very high pressure, thereby improved security of system, reliability, also reduced manufacture difficulty and cost, the mode that the gas pre-cooling promptly can adopt metal tube directly to immerse liquid nitrogen also can adopt the mode that does not directly immerse liquid nitrogen; When adopting the direct liquid nitrogen mode of metal tube, can adopt the way of control metal tube immersion depth, the control precooling temperature, cryogenic media adopts the liquid nitrogen of stable performance, also can adopt media such as liquid oxygen, liquid hydrogen; Gases at high pressure can adopt the gas of argon, nitrogen, oxygen or other throttling refrigerations, according to the treatment needs, be provided with the freezing pin of many groups, each pin all can be controlled use separately, be provided with temperature sensor at the syringe needle shank, in order to reaction syringe needle temperature, the temperature difference between syringe needle and shank pick off back is by experiment eliminated with the method for date processing.Cryogenic gas after the throttling returns and enters atmosphere by the return-air flexible pipe, during to the further pre-cooling of the air inlet of metal inner pipe cooling.

Claims

1, therapy apparatus is frozen in a kind of liquid air cooling, comprise pressure cylinder, device for drying and filtering, control valve, advance return line, freezing pin, described each several part is connected by conduit, it is characterized in that: described air inlet pipeline is provided with the precooler that cryogenic media is housed, and described syringe needle shank is equipped with temperature sensor.

2, therapy apparatus is frozen in a kind of liquid air cooling, comprise pressure cylinder, device for drying and filtering, control valve, advance return line, freezing pin, described each several part is connected by conduit, it is characterized in that: described air inlet pipeline is provided with the precooler that cryogenic media is housed, and on the described return line temperature sensor is housed.

3, therapy apparatus is frozen in liquid air cooling as claimed in claim 1 or 2, and it is characterized in that: described precooler is made up of Dewar bottle that fills liquid nitrogen and appendix, and appendix 11 lower end curls or plate-like immerse in the liquid nitrogen.

4, therapy apparatus is frozen in liquid air cooling as claimed in claim 1 or 2, it is characterized in that: described precooler is made up of Dewar bottle that fills liquid nitrogen and appendix, be provided with interior bucket in the described Dewar bottle, liquid nitrogen leaves in the described interior bucket, and described appendix is wrapped in described interior bucket periphery.