CN207220873U - A kind of gas throttling type Cryo-surgical apparatus - Google Patents

Abstract

The utility model discloses a kind of gas throttling type Cryo-surgical apparatus, including high pressure freezing gas circuit, low pressure feeding pneumatic, low pressure pyrogenicity gas circuit, shunting gas circuit, freezer unit appendix and freezer unit, and it is provided with gas preheating unit.Using from high pressure frozen gas shunting and pressure limiting to less than its throttle operating pressure gas rewarming (shunting rewarming)；The residual gas rewarming (residual air rewarming) of operating pressure is freezed using less than it；Utilize usual pressure gas rewarming (general pressure rewarming)；Thermal gas rewarming (throttling rewarming) is caused using throttling；Closed using source of the gas, equipment exhaust process rewarming (exhaust rewarming).Improve rewarming efficiency and temperature, and it correct for the technology prejudice that throttling refrigeration type gas is only used for freezing, solves the rewarming problem of gas throttling type cryosurgery apparatus, improve gas effciency, reduce operation cost, energy conservation and environmental protection, lifting rewarming performance and the function of increasing thermotherapy, help the popularization and raising for promoting cryoablation technology.

Description

A kind of gas throttling type Cryo-surgical apparatus

Technical field

It the utility model is related to the medical instrument of cryosurgery treatment, a kind of gas throttling type cryosurgery of utility model System.

Background technology

Cryosurgery treatment is the method using ultralow temperature damage and ablation lesion tissue, and is made earliest in human history Pathological tissues ablation techniques.From nineteen sixty American Psychiatry surgeon Irving Cooper and engineer Arnold Lee Utility model probe shape liquid nitrogen freezing apparatus and for after freezing brain tissue, using liquid nitrogen as cryogenic fluid (refrigerant), heating Nitrogen is applied to treat various tumours as the liquid nitrogen frozen surgical device of high temperature refrigerant (heating agent).But liquid nitrogen frozen equipment is answered Miscellaneous heavy, operating difficulties and curative effect is not good enough once made cryosurgery treatment sink into pause for a long time and decline.

From generation nineteen ninety, outside the gas throttling type cryogenic freezing headed by argon helium knife based on Joule-Thomson principle The utility model of section's system and extensive use, make cryosurgery regain the accreditation of medical field, have brought back to life cryogenic freezing surgery Treatment technology.Such as using high pressure argon gas freezing and it is general pressure helium rewarming argon helium knife by oncology, Invasive Technology Department, uropoiesis outside The clinical departments such as section, thoracic surgery, liver and gall surgical department, division of respiratory disease, Gastroenterology dept. use, for liver cancer, lung cancer, cancer of pancreas, prostate cancer, The cryoablation treatment of the various good malignant entity tumors such as kidney neoplasms, bone tumour, brain tumor, soft tissue neoplasm, becomes clinical universal One of tumour cryoablation method of application.

Cryogenic fluid is transported to the device that target tissue freezes it and is named as freezer unit by the utility model.Freezing During surgery is studied and put into practice, freezer unit is also referred to as cryoprobe, frozen probe rod, cryoprobe, cryoprobe, freezing sacculus, freezing electricity Pole, super cold surery device, cryoprobe, cryotip or cryoneedle etc..

The two aspects that cryosurgery treatment technology needs snap frozen and rewarming thaws.According to its operation principle and use Cryogenic fluid (refrigerant), main freezing mode has：

(1) liquid gasification type：The freezing mode of gasification heat absorption using cryogenic liquid (such as liquid nitrogen) as cryogenic fluid, such as Liquid nitrogen frozen equipment.The advantages of such a freezing mode is that common cryogenic liquid easily obtains, and of low cost.Shortcoming is fortune Defeated and storage is inconvenient, and equipment volume is huge and heavy；Cryogenic liquid is exported to freezer unit by equipment connecting tube, must Heat insulation layer is protected, and causes pipeline and freezer unit thick stiff；And because freezer unit often has " gas blocks up " to need stopping and replacement in art to set The problem of standby.Meanwhile its freezing starting is slow and freezing rate is low, causes cell dehydration and influences refrigerating effect and local recurrence The problem of rate is high.

(2) gas throttling type：The freezing mode of low temperature is produced using the Joule-Thomson throttle effect of gases at high pressure, such as Argon helium knife uses equipment of the compressed gas as cryogenic fluid with other.Its advantage is to use gas at normal temperature, air shooter and Freezer unit bar is not required to insulated heat, avoids the splash, leakage and frostbite of cryogenic freezing liquid；Controllability is good, easy to operate, freezing speed Degree is fast, freezer unit diameter is thin.The drawback is that frozen gas operating pressure is high, and cryogenic fluid is caused to waste very because pressure declines Greatly.If argon helium knife is usually using 40 liters of argon bottles of full bottle pressure 35MPa, argon gas minimum operating pressure is 20MPa during freezing, often Bottle can only use 1~1.5 it is small when, and drastically reduced less than the argon gas restriction effect of 20MPa, several no refrigerating effects.Consider equipment Partial pressure itself, when gas cylinder output pressure is less than 21MPa, equipment exports to the pressure of freezer unit and will be less than 20MPa, can only discard. Namely only have about 40% can utilize in whole bottle gas, 60% must discard.This brings greatly production, transport and using wave Take.

The rewarming or heating function of freezing equipment be realize that modern cryosurgery generally acknowledges " freezing-rewarming-freezes again-again Rewarming " Two-way Cycle therapeutic modality and function necessary to freezer unit is exited from freezing tissue.According to high temperature refrigerant (heating agent) Species and method, main rewarming mode have：

(1) low-pressure gas of heating is passed through freezer unit, using heat transfer, directly heats inside freezer unit, such as liquid nitrogen frozen The rewarming of equipment.The advantages of such a rewarming mode is of low cost, technology maturation.Shortcoming is that liquid nitrogen plant needs to be equipped with additionally Gas recycling, compression, storage and heating unit, volume is larger, complicated and rewarming speed is slower.

(2) heat-producing units such as the electric heating being placed in freezer unit, radio frequency, microwave, laser heating rewarming is utilized.Its advantage is not It need to use or less use gas.The drawback is that rewarming speed is slower；And need by the inputs such as electric current directly contact tissue, Inside the extremely low freezer unit of temperature, special electric shock and electromagnetic interference equivalent risk are produced.

(3) gas direct heat production in freezer unit of throttle effect heat production under room temperature is utilized, as argon helium knife is answered using helium Temperature (helium reversal temperature is 40K, throttling expansion heat release under room temperature).Such a rewarming mode brings the rewarming being exceedingly fast and response speed Degree, controllability is good, and simple in structure, it is not necessary to extra means.But shortcoming is that the helium of rewarming belongs to expensive rare gas, according to Rely import, price is about 8~10 times of same amount peer argon gas, and cost is very high；Helium heating ability is limited at the same time, only up to reach Arrive 320K or so.

Utility model content

The utility model solves the existing rewarming problem of gas throttling type cryosurgery therapeutic equipment, correct for throttling and causes Cold gas is only used for the technical prejudice that refrigeration, proposes multiple using throttling refrigeration type gases at high pressure shunting rewarming and exhaust Temperature, utilize high pressure residual air and general body rewarming of calming the anger, the compatible throttling cause thermal gas rewarming and Novel air body segment that can actively heat The design and embodiment of flow pattern cryosurgery system, economical can freeze, three kinds of functions of multiple mild heat with neatly realization.With Lower citing argon helium knife, but the utility model includes all cryogenic freezing surgical devices using gas throttling effect, is not limited to Argon helium knife.

In order to solve above-mentioned rewarming technical problem, the utility model proposes a kind of gas throttling type Cryo-surgical apparatus, Its basic structure include high pressure freezing gas circuit, low pressure feeding pneumatic, low pressure pyrogenicity gas circuit, shunting gas circuit, freezer unit appendix and Freezer unit；The high pressure freezing gas circuit includes gases at high pressure input pipe, the frozen gas being sequentially connected with high-pressure air source gas outlet Manifold and freezer unit appendix, the gases at high pressure input pipe are equipped with high pressure air gauge and high-pressure pressure regulating valve, the high pressure gas The junction of body input pipe and the frozen gas manifold are equipped with high-pressure limiting valve, on the gases at high pressure input pipe, positioned at institute The pipeline section stated between high-pressure pressure regulating valve and the high-pressure limiting valve is equipped with the first threeway；The low pressure feeding pneumatic includes：With Residual air delivery outlet that high pressure residual air source of the gas is connected, the general pressure delivery outlet being connected with general pressurized air source, the helium that is connected with helium gas source are defeated Outlet；The junction of the high pressure residual air source of the gas and the residual air delivery outlet is equipped with residual air air gauge and residual air pressure regulator valve；It is described The junction of general pressurized air source and general pressure delivery outlet is equipped with general pressure air gauge and general pressure pressure regulator valve；The helium gas source and the helium are defeated The junction of outlet is equipped with helium air gauge and helium pressure regulator valve；The low pressure pyrogenicity gas circuit includes low pressure confluence tracheae and pyrogenicity Gas main, one end of low pressure confluence tracheae are low-pressure gas input port, the residual air delivery outlet, the general pressure delivery outlet The low-pressure gas input port is connected to one of the helium delivery outlet；The other end of the low pressure confluence tracheae is connected to unanimously Hot gas manifold；The low pressure confluence tracheae is equipped with low-voltage solenoid valve and low pressure pressure limiting valve, and the low pressure is converged on tracheae, position Pipeline section between the low-voltage solenoid valve and low pressure pressure limiting valve is equipped with the second threeway；First threeway and the described 2nd 3 Shunting tracheae is connected between logical, the shunting tracheae is equipped with solenoid diverter valve, the shunting tracheae and the shunting electromagnetism Valve constitutes the shunting gas circuit；The freezer unit appendix is connected to the frozen gas manifold and the pyrogenicity gas main End between, and be connected to by the 4th threeway the air inlet pipe of freezer unit, be located at the freezing on the freezer unit appendix Pipeline between the end of gas main and the 4th threeway is equipped with freezer unit freezing solenoid valve, the freezer unit appendix The upper pipeline between the end of the pyrogenicity gas main and the 4th threeway is equipped with freezer unit heating electromagnetic valve.

The utility model proposes another technical solution be the gas throttling type Cryo-surgical apparatus and above-mentioned basic knot Structure is different only in that：Wherein, it is independent to be equipped with a helium input pipe, from helium gas source the helium is connected to by helium delivery outlet Input pipe, the helium input pipe are equipped with the helium air gauge, the helium pressure regulator valve, helium solenoid valve and helium pressure limiting Valve, the helium input pipe access pyrogenicity gas main at the 3rd threeway.

Further, the pyrogenicity gas main is equipped with gas heater.

The cause in the end and the low-pressure heating gas circuit of the frozen gas manifold of the high pressure freezing gas circuit The end of hot gas manifold is parallel with a plurality of freezer unit appendix, every freezer unit appendix by the 4th threeway of multiple series connection End be connected with a freezer unit.Realize more freezer units synchronously freezing or rewarming operation.

It is the freezer unit freezing solenoid valve that is connected with freezer unit appendix, freezer unit heating electromagnetic valve, the 4th threeway, cold Freeze device air inlet pipe and freezer unit constitute one be connected to the total pipe end of the frozen gas and the pyrogenicity gas main end it Between component A；It is characterized in that, it is parallel between the total pipe end of the frozen gas and the pyrogenicity gas main end more A component A, realizes that more freezer units independently freeze or rewarming operates.

The freezer unit is that the gas throttling refrigeration type that low temperature is produced using the Joule-Thomson throttle effect of gas is freezed Device；The high-pressure air source is the mixture for the one or more that throttling expansion is caused in cold gas；The high-pressure air source, the height Discard gas source of the gas, the general pressurized air source and the helium gas source come from appointing in gas cylinder, gas tank, air pump, Dewar tank and compressor What is at one.

Compared with prior art, the beneficial effects of the utility model are：

(1) rewarming is shunted：The utility model correct for the technology prejudice that throttling refrigeration type gases at high pressure are only used for freezing, lead to Shunting and pressure limiting are crossed, it is directly used in rewarming.Our research indicate that when the argon pressure for being passed through freezer unit is less than its 20MPa Throttling operating pressure when, throttling cooling-down effect rapidly weaken and disappear；The room temperature argon gas (300K) in freezer unit will be with this time Tissue (100-273K) heat exchange of its external refrigerating system and realize rewarming.

(2) it is vented rewarming：The utility model utilizes the process of emptying equipment residual air to be used for freezer unit rewarming.Cryosurgery is set Emptying equipment residual air is needed after standby use, because all sources of the gas at this time are turned off and effect through pressure limiting valve, gas pressure general in equipment It is down under refrigeration operating pressure, exhaust process there will be rewarming effect.At this time freezer unit discharge refrigeration argon gas will and pyrogenicity Argon/helium be together freezer unit rewarming, both realized emptying residual air, and also realized rewarming, killed two birds with one stone, further reduce to gas The requirement of body and use cost.

(3) residual air rewarming：The utility model takes full advantage of less than freezing operating pressure, cannot be used for the remaining high of freezing Pressure cooling gas are used for rewarming.Argon gas during argon helium knife use less than 21MPa cannot use, and can only retract gas life by bottle entirely Business men bleed off residual air with again it is filling could keep 99.999% high-purity requirement.The utility model utilizes such a residual air rewarming, Reach with expensive helium rewarming similar in effect.

(4) general pressure rewarming：The utility model can also be used the common general arbitrary gas for pressing filling (12~15MPa) and be used for again Temperature.This kind of general body of calming the anger is seen everywhere and uses general compressed steel bottle (cost is 1/8th of high-pressure cylinder), its gas price is about For 1/10th of same volume gases at high pressure.

(5) throttle rewarming：The utility model is also compatible with throttling pyrogenicity rewarming gas (such as helium) rewarming and is incorporated into low pressure In rewarming pipeline, to play the efficiency of helium rapid rewarming.Our research is found at the same time, since helium reversal temperature is close to absolutely To zero degree, and its pyrogenicity ability (Joule-Thomson coefficient) that throttles is not varied with temperature and changed between 150K~400K, is introduced Gas heater, which heats helium, will be superimposed throttling rewarming and conduction pyrogenicity double effects, greatly enhance the rewarming effect and speed of device Degree.

(6) gas preheats：The utility model is also introduced into gas-heating apparatus preheating rewarming gas, it is used for controllable heating Pathological tissues, realize tumor thermotherapy effect.

To sum up, the gases used cost of the utility model is low：By the use of the shunting of high pressure argon gas, residual air and general body of calming the anger as again Wet body, its cost will be significantly lower than rare throttling pyrogenicity type high-purity helium (more than 8 times of difference)；It is vented by using equipment Rewarming and use cannot be used for the high-pressure air source residual air rewarming of freezing, can improve gas effciency, avoid wasting, energy-saving ring Protect.The utility model i.e. using existing helium rewarming technology, answer by the general body of calming the anger that high pressure residual air can also be used and be seen everywhere Temperature, it is not necessary to which independent gas collection, compression and pushing meanss, reduce equipment and using threshold, promote cryoablation technology Popularization.By introducing gas heater, low-pressure gas can be directly preheated to tumor thermotherapy temperature and inputs freezer unit, breach existing There is the heating limit value of equipment, improve heating performance and add the function of thermotherapy.

Brief description of the drawings

Fig. 1 is the schematic diagram of the utility model gas throttling type Cryo-surgical apparatus embodiment 1；

Fig. 2 is the schematic diagram of the utility model gas throttling type Cryo-surgical apparatus embodiment 2；

Fig. 3 is the schematic diagram of the utility model gas throttling type Cryo-surgical apparatus embodiment 3；

Fig. 4 is the schematic diagram of the utility model gas throttling type Cryo-surgical apparatus embodiment 4；

Fig. 5 is the schematic diagram of the utility model gas throttling type Cryo-surgical apparatus embodiment 5；

Fig. 6 is the schematic diagram of the utility model gas throttling type Cryo-surgical apparatus embodiment 6；

Fig. 7 is freezer arrangements schematic diagram used in the utility model；

Fig. 8 is the result of the test that embodiment 1 is vented rewarming pattern；

Fig. 9 is the result of the test of 1 residual air rewarming pattern of embodiment.

In figure：

1a- high-pressure air source 1b- high pressure air gauge 1c- high-pressure pressure regulating valves

2- gases at high pressure input pipe 3- the first threeway the second threeways of 4-

5- high-pressure limiting valve 6- frozen gas manifold 7- freezer units freeze solenoid valve

8- freezer unit appendix 9- freezer unit 9a- freezer unit air inlet pipe

9c-J-T mouthfuls of 9d- expansion chambers of 9b- heat exchange fins

9e- freezer unit outer wall 9f- back cavity 9h- freezer unit air outlet pipes

9i- thermometric galvanic couple 10a- high pressure residual air source of the gas 10b- residual air air gauges

The general pressurized air sources of 10c- residual air pressure regulator valve 10d- residual air delivery outlet 11a-

The general pressure general pressure general pressure delivery outlets of pressure regulator valve 11d- of air gauge 11c- of 11b-

12a- helium gas source 12b- helium air gauge 12c- helium pressure regulator valves

12d- helium delivery outlets 13- shunts tracheae 14- solenoid diverter valves

15- helium input pipe 16- helium solenoid valve 17- helium pressure limiting valves

18- low-pressure gases input port 19- low-voltage solenoid valve 20- low pressure confluence tracheae

The 3rd threeway 23- gas heaters of 21- low pressure pressure limiting valves 22-

The 4th threeways of 24- pyrogenicity gas main's 25- freezer unit heating electromagnetic valves 26-

Embodiment

Technical solutions of the utility model are described in further detail with specific embodiment below in conjunction with the accompanying drawings, it is described Specific embodiment is only explained the utility model, is not intended to limit the utility model.All embodiments use Freezer unit be HealthTronics companies of the U.S. manufacture freezer unit (Φ 1.7mm, Φ 2.4mm, Φ 3.8mm etc.).

Embodiment 1：As shown in Figure 1, a kind of gas throttling type Cryo-surgical apparatus of the utility model, including high pressure freezing gas Road, low pressure feeding pneumatic, low pressure pyrogenicity gas circuit, shunting gas circuit, freezer unit appendix 8 and freezer unit 9.

The high pressure freezing gas circuit includes gases at high pressure input pipe 2 and the freezing being sequentially connected with high-pressure air source 1a gas outlets Gas main 6, and the gases at high pressure input pipe 2 is equipped with high pressure air gauge 1b and high-pressure pressure regulating valve 1c, the gases at high pressure are defeated The junction for entering the pipe 2 and frozen gas manifold 6 is equipped with high-pressure limiting valve 5；On the gases at high pressure input pipe 2, positioned at institute The pipeline section stated between high-pressure pressure regulating valve 1c and the high-pressure limiting valve 5 is equipped with the first threeway 3.

The low pressure feeding pneumatic includes：The residual air delivery outlet 10d being connected with high pressure residual air source of the gas 10a and general pressurized air source General pressure delivery outlet 11d, the helium delivery outlet 12d being connected with helium gas source 12a that 11a is connected；The high pressure residual air source of the gas 10a and institute The junction for stating residual air delivery outlet 10d is equipped with residual air air gauge 10b and residual air pressure regulator valve 10c；The general pressurized air source 11a and general pressure The junction of delivery outlet 11d is equipped with general pressure air gauge 11b and general pressure pressure regulator valve 11c；The helium gas source 12a is exported with the helium The junction of mouth 12d is equipped with helium air gauge 12b and helium pressure regulator valve 12c.

The high-pressure air source 1 is the mixture for the one or more that throttling expansion is caused in cold gas；The high-pressure air source 1a, the high pressure residual air source of the gas 10a, the general pressurized air source 11a and the helium gas source 12a come from gas cylinder, gas tank, air pump, Du Any one in crock and compressor.

The low pressure pyrogenicity gas circuit includes low pressure confluence tracheae 20 and pyrogenicity gas main 24, the low pressure confluence tracheae 20 One end be low-pressure gas input port 18, the residual air delivery outlet 10d, the general pressure delivery outlet 11d and the helium delivery outlet It is to be detachably connected between 12d and the low-pressure gas input port 18；The other end of the low pressure confluence tracheae 20 is connected to institute State pyrogenicity gas main 24；The low pressure confluence tracheae 20 is equipped with low-voltage solenoid valve 19 and low pressure pressure limiting valve 21, the low pressure Converge on tracheae 20, the pipeline section between the low-voltage solenoid valve 19 and the low pressure pressure limiting valve 21 is equipped with the second threeway 4.

Shunting tracheae 13 is connected between first threeway 3 and second threeway 4, the shunting tracheae 13 is equipped with Solenoid diverter valve 14, the shunting tracheae 13 and the solenoid diverter valve 14 constitute the shunting gas circuit；

The freezer unit appendix 8 be connected to the frozen gas manifold 6 and the pyrogenicity gas main 24 end it Between, and the air inlet pipe 9a of freezer unit 9 is connected to by the 4th threeway 26, it is located at the freezing gas on the freezer unit appendix 8 Pipeline between the end of body manifold 6 and the 4th threeway 26 is equipped with freezer unit freezing solenoid valve 7, the freezer unit gas transmission Pipeline on pipe 8 between the end of the pyrogenicity gas main 24 and the 4th threeway 26 is equipped with freezer unit heating electricity Magnet valve 25.

The freezer unit 9 in the utility model is the gas that low temperature is produced using the Joule-Thomson throttle effect of gas Body throttling refrigeration type freezer unit.A kind of its typical structure is as shown in fig. 7, the freezer unit 9 includes freezer unit air inlet pipe 9a, changes Hot fin 9b, J-T mouthfuls of 9c, expansion chamber 9d, freezer unit outer wall 9e, back cavity 9f and freezer unit air outlet pipe 9h, the expansion chamber 9d Tip be equipped with thermometric galvanic couple 9i, the temperature of the freezer unit is measured in real time by the thermometric galvanic couple 9i.

Certainly, the geometry of the application obscure portions of freezer unit 9 described in the utility model and detail structure are unrestricted, The geometry of its application obscure portions can be appointing in cheese, spherical, elliposoidal, sacculus shape, needle-shaped, column, rod-shaped and tubulose What is a kind of；The difference of its thin portion structure can be cryoprobe, frozen probe rod, cryoprobe, cryoprobe, freezing sacculus, freezing electricity One kind in pole, super cold surery device, cryoprobe, cryotip and cryoneedle.

The control method that embodiment 1 is realized is as follows：

Frozen mode：Throttling frozen type gases at high pressure are exported by high-pressure air source 1a, by high pressure air gauge 1b and high pressure pressure regulation Valve 1c regulates and controls, and through gases at high pressure input pipe 2, accesses high-pressure limiting valve 5, through pressure limiting to after freezing operating pressure, access freezing gas Body manifold 6.When starting freezer unit freezing solenoid valve 7, high pressure frozen gas are passed through cold by freezer unit appendix 8 through the 4th threeway 26 Freeze device air inlet pipe 9a；The throttling expansion at freezer unit air inlet pipe 9a end J-T mouthful 9c of the frozen gas of input to expansion chamber 9d, is led to Cross adjacent freezer unit outer wall 9e and surrounding tissue heat exchange, absorption refrigeration；The cryogenic gas of back cavity 9f reflux is through heat exchange wing With freezer unit air inlet pipe 9a air inlets heat exchange occurs for piece 9b, after cooling air inlet is to improve throttle effect, chilled device air outlet pipe 9h Flow out and discharge into air.The temperature of freezer unit is measured in real time by the thermometric galvanic couple 9i for being placed in freezer unit front inner wall.

The rewarming pattern that the utility model embodiment 1 is realized according to the source of rewarming gas can be divided into shunting rewarming pattern, Residual air rewarming pattern, general pressure rewarming pattern, throttling rewarming pattern and exhaust rewarming pattern, wherein, residual air rewarming pattern, general pressure are multiple In warm pattern and throttling rewarming pattern, the residual air delivery outlet, general pressure one of the delivery outlet and the helium delivery outlet are connected to The low-pressure gas input port.Each rewarming pattern is detailed below：

(1) rewarming pattern is shunted：High-pressure pressure regulating valve 1c, solenoid diverter valve 14 and freezer unit heating electromagnetic valve 25 are opened, together When close low-voltage solenoid valve 19 and freezer unit freezing solenoid valve 7；Rewarming gas is drawn by the first threeway 3 on gases at high pressure input pipe 2 Go out, through shunting tracheae 13 and solenoid diverter valve 14, pass through the second threeway 4, access low pressure confluence tracheae 20, through the low pressure pressure limiting 21 pressure limiting of valve, accesses the pyrogenicity gas main 24, is controlled by the freezer unit heating electromagnetic valve 25, through the freezer unit gas transmission Pipe 8 and the 4th threeway 26 are exported to the freezer unit 9, realize that rewarming operates by heat exchange, when freezer temps reach 0 DEG C to during normal body temperature or the high pressure air gauge 1b show air pressure be down to 1 atmospheric pressure when, terminate the shunting rewarming.

(2) residual air rewarming pattern：The residual air delivery outlet 10d is connected to the low-pressure gas input port 18, opens residual air Pressure regulator valve 10c, low-voltage solenoid valve 19 and freezer unit heating electromagnetic valve 25, simultaneously close off solenoid diverter valve 14 and freezer unit freezing electricity Magnet valve 7；Rewarming gas is from the high pressure residual air source of the gas 10a, through the residual air air gauge 10b and the residual air pressure regulator valve 10c tune Control, the low-pressure gas input port 18 is accessed by the residual air delivery outlet 10d, then through the low-voltage solenoid valve 19, described in access Low pressure confluence tracheae 20, through 21 pressure limiting of low pressure pressure limiting valve, accesses the pyrogenicity gas main 24, is heated by the freezer unit Solenoid valve 25 controls, and is exported through the freezer unit appendix 8 and the 4th threeway 26 to the freezer unit 9, passes through heat exchange Realize that rewarming operates, when freezer temps reach 0 DEG C to normal body temperature or the residual air air gauge 10b shows that air pressure is down to 1 During a atmospheric pressure, terminate the residual air rewarming.

(3) general pressure rewarming pattern：The general pressure delivery outlet 11d is connected to the low-pressure gas input port 18, opens general pressure Pressure regulator valve 11c, low-voltage solenoid valve 19 and freezer unit heating electromagnetic valve 25, simultaneously close off solenoid diverter valve 14 and freezer unit freezing electricity Magnet valve 7；Rewarming gas is from the general pressurized air source 11a, through the general pressure air gauge 11b and the general pressure pressure regulator valve 11c regulation and control, by The general pressure delivery outlet 11d accesses the low-pressure gas input port 18, then through the low-voltage solenoid valve 19, accesses the low pressure and converge Flow tube 20, through 21 pressure limiting of low pressure pressure limiting valve, accesses the pyrogenicity gas main 24, by the freezer unit heating electromagnetic valve 25 controls, export to the freezer unit 9 through the freezer unit appendix 8 and the 4th threeway 26, are realized by heat exchange multiple Temperature operation, when freezer temps reach 0 DEG C to normal body temperature or the general pressure air gauge 11b shows that 1 air is down in air pressure During pressure, terminate the general pressure rewarming.

(4) throttle rewarming pattern：The helium delivery outlet 12d is connected to the low-pressure gas input port 18, helium is by helium Source of the gas 12a, regulates and controls through helium air gauge 12b and helium pressure regulator valve 12c, by helium delivery outlet 12d, is connected to low-pressure gas input port 18, then through low-voltage solenoid valve 19, import low pressure confluence tracheae 20；When the helium from low pressure confluence tracheae 20 is through low pressure pressure limiting valve 21 pressure limitings are to helium operating pressure 6.9MPa or more, access pyrogenicity gas main 24, and chilled device heating electromagnetic valve 25 is controlled System, chilled device appendix 8 and the 4th threeway 26 are exported to freezer unit air inlet pipe 9a, this throttling rewarming gas is in freezer unit Throttling expansion is surrounding through adjacent freezer unit outer wall 9e to heat release pyrogenicity during expansion chamber 9d at air inlet pipe 9a end J-T mouthful 9c Organize rewarming；When the helium from low pressure confluence tracheae 20, pressure is less than helium operating pressure after 21 pressure limiting of low pressure pressure limiting valve During 6.9MPa, helium will realize that rewarming is operated by heat exchange, when freezer temps reach 0 DEG C to normal body temperature, terminate this Throttle rewarming.

(5) rewarming pattern, including one of two following situations are vented：

First, high pressure gas rewarming after throttling refrigeration operation, closes the high-pressure pressure regulating valve 1c and opens freezing electromagnetism at the same time Valve 7, the high pressure, which freezes the frozen gas accumulated in gas circuit, will be continually fed into freezer unit 9, due to being passed through the gas of freezer unit 9 at this time Body pressure is down to it and is freezed under operating pressure, its throttling refrigeration effect will disappear, which will be changed into rewarming gas.This rewarming gas Body freezer unit expansion chamber 9d through adjacent freezer unit outer wall 9e and around freezing tissue heat exchange and pyrogenicity；The gas warp of reflux Back cavity 9f and freezer unit air outlet pipe 9h are discharged into air.Until freezer temps reach 0 DEG C to during normal body temperature or described When high pressure air gauge 1b shows that 1 atmospheric pressure is down in air pressure, terminate exhaust rewarming；

Second, low pressure exhaust rewarming, closed after rewarming operation the residual air pressure regulator valve 10c, the general pressure pressure regulator valve 11c or The helium pressure regulator valve 12c, opens the low-voltage solenoid valve 19 and the freezer unit pyrogenicity solenoid valve 25, in the low pressure line It is its rewarming that remaining pyrogenicity gas, which will be continually fed into the freezer unit 9, until freezer temps reach 0 DEG C to during normal body temperature or When all air gauges show that 1 atmospheric pressure is down in air pressure, terminate exhaust rewarming.

Embodiment 2：As shown in Fig. 2, on the basis of above-described embodiment 1, positioned at described on the pyrogenicity gas main 24 Pipeline between low pressure pressure limiting valve 21 and freezer unit pyrogenicity solenoid valve 25 is equipped with gas heater 23, makes low pressure rewarming gas pre- Freezer unit is inputted after heat again, so as to strengthen the effect of multiple mild heat.

The control method that embodiment 2 is realized includes frozen mode and rewarming pattern, different multiple according to the source of rewarming gas Warm pattern can be divided into (1) shunting rewarming pattern, (2) residual air rewarming pattern, (3) general pressure rewarming pattern, (4) throttling rewarming pattern and (5) rewarming pattern is vented, it controls process mode corresponding with embodiment 1 essentially identical, adds simply by the gas of introducing Hot device 23, can directly preheat low-pressure gas and input freezer unit, breach the heating limit value and programming rate of existing equipment, improve Heating performance and the function of adding thermotherapy.

Embodiment 3：As shown in figure 3, the basic structure phase of the gas throttling type Cryo-surgical apparatus and above-described embodiment 1 Seemingly, difference is：The present embodiment helium path is separated with other low-pressure gas paths, and sets the helium solenoid valve of independent control With helium pressure limiting valve, i.e. helium accesses an independent helium input pipe 15 by the helium gas source 12a, its other end is in the 3rd threeway It is connected to the pyrogenicity gas main 24 at 22, is equipped with the helium air gauge 12b, described on the helium input pipe 15 successively Helium pressure regulator valve (12c), helium solenoid valve 16 and helium pressure limiting valve 17.

Embodiment 3 sets independent 17 pressure limiting of helium pressure limiting valve to helium throttling pyrogenicity operating pressure (6.9MPa). And remaining low pressure rewarming gas can be by 21 pressure limiting of low pressure pressure limiting valve to any default operating pressure, from the limit of helium operating pressure System, can make full use of the efficiency of throttling pyrogenicity rapid rewarming and improve the utilization rate of low-pressure gas.

The control method that embodiment 3 is realized includes frozen mode and rewarming pattern：

Frozen mode：With embodiment 1.

Rewarming pattern：According to the source of rewarming gas, can be divided into：

(1) rewarming pattern is shunted：With embodiment 1；

(2) residual air rewarming pattern：With embodiment 1；

(3) general pressure rewarming pattern：With embodiment 1；

(4) helium rewarming pattern：Helium, through helium air gauge 12b and helium pressure regulator valve 12c, accesses helium by helium gas source 12a Gas input pipe 15, and through helium solenoid valve 16 and helium pressure limiting valve 17, after pressure limiting to helium pyrogenicity operating pressure, through the 3rd threeway 22, access pyrogenicity gas main 24；Chilled device heating electromagnetic valve 25 controls again, through the freezer unit appendix 8 and described Four threeways 26 are exported to freezer unit air inlet pipe 9a, implement the operation of freezer unit rewarming.

(5) it is vented rewarming pattern：With embodiment 1.

Embodiment 4：As shown in figure 4, on the basis of above-described embodiment 3, positioned at described on the pyrogenicity gas main 24 Pipeline between 3rd threeway 22 and freezer unit pyrogenicity solenoid valve 25 is equipped with gas heater 23, makes low pressure rewarming gas (bag Include helium) preheating after input freezer unit again, so as to strengthen the effect of multiple mild heat.

The control method that embodiment 4 is realized includes frozen mode and rewarming pattern, different multiple according to the source of rewarming gas Warm pattern can be divided into：(1) rewarming pattern, (2) residual air rewarming pattern, (3) general pressure rewarming pattern, (4) throttling rewarming pattern are shunted (5) rewarming pattern is vented, it controls process mode corresponding with embodiment 3 essentially identical, simply by the gas of introducing Heater 23, can directly preheat low-pressure gas and input freezer unit, breach the heating limit value and programming rate of existing equipment, carry High warming and can add the function of thermotherapy.

Embodiment 5：As shown in figure 5, on the basis of above-described embodiment 1-4, the freezer unit appendix (8) is positioned at described Have the described 4th 3 of multiple series connection on pipeline section between freezer unit freezing solenoid valve (7) and freezer unit heating electromagnetic valve (25) Logical (26), each 4th threeway (26) connect a freezer unit (9) respectively.The control method of embodiment 5 such as embodiment Any control method is essentially identical in 1-4, and more freezer units synchronously freezing or rewarming finally can be achieved.

Embodiment 6：As shown in fig. 6, on the basis of above-described embodiment 1-4, the freezer unit appendix 8 and disposed thereon Freezer unit freezing solenoid valve 7, freezer unit heating electromagnetic valve 25, the 4th threeway 26, air inlet pipe 9a and the freezer unit 9 constitute one The component A being connected between 6 ends of frozen gas manifold and 24 end of pyrogenicity gas main, in the frozen gas Multiple component A are parallel between 6 ends of manifold and 24 end of pyrogenicity gas main.The control method of embodiment 6 As any control method is essentially identical in embodiment 1-4, the mutually independent freezing of more freezer units or rewarming finally can be achieved.

Verification experimental verification：

(1) it is vented rewarming verification：Freezing exhaust rewarming is carried out to 1 technical solution of embodiment (no gas preheating) to test Card：The 2.4mm diameter freezer units that HealthTronics companies of the U.S. manufacture are connected to the device first, before the freezer unit End frozen portions be totally submerged in 36~37 DEG C of thermostatted waters close to body temperature, temperature probe be respectively placed in water neutralize be fixed on it is cold Freeze device front end；High-pressure air source 1, high pressure are used as using 25MPa (3500psi) the high pressure argon gas sources higher than argon gas throttling operating pressure Pressure limiting valve 5 is arranged on 20MPa (2800psi), starts to test at 22 DEG C of room temperature." frozen mode " first is used, opens high pressure tune Pressure valve 1c and freezer unit freezing solenoid valve 7, freezer unit is refrigerated to -100 DEG C and forms normal ice hockey by high pressure argon gas to stop after five minutes Only freeze.Start " exhaust rewarming " operating mode immediately, close high-pressure pressure regulating valve 1c and keep freezer unit freezing solenoid valve 7 to open Open, gas is gradually discharged from freezer unit 9 in device, air pressure declines from 20MPa (2800psi), by freezer unit rewarming in 180 seconds To more than 10 DEG C.Result of the test is as shown in Figure 8.This is the experiment proves that the good result of exhaust rewarming.

(2) residual air rewarming is verified：Residual air rewarming verification experimental verification has been carried out to 1 technical solution of embodiment：First by the U.S. The 2.4mm diameter freezer units of HealthTronics companies manufacture are connected to the device, and the freezer unit front end frozen portions are complete It is immersed in close in 36~37 DEG C of thermostatted waters of body temperature, 21 DEG C of room temperature；Temperature probe, which is respectively placed in water and neutralizes, is fixed on freezer unit Probe distal end.High-pressure air source 1, residual air are used as using 25MPa (3500psi) the high pressure argon gas sources higher than argon gas throttling operating pressure Source of the gas 10a is used below remaining 17.5MPa (2500psi) the pressure argon gas of argon gas refrigeration operating pressure and sets low pressure pressure limiting valve 21 be 12.5MPa (1800psi)." frozen mode " first is used, opens high-pressure pressure regulating valve 1c and freezer unit freezing solenoid valve 7, it is high Pressure argon gas by freezer unit be refrigerated to -100 DEG C and formed normal ice hockey close after five minutes freezer unit freezing solenoid valve 7 stop freezing. Start " residual air rewarming pattern " immediately, open low-voltage solenoid valve 19 and freezer unit heating electromagnetic valve 25, pressure limiting 12.5MPa The low-pressure argon of (1800psi) will input freezer unit 9, by 9 rewarming of freezer unit to more than 0 DEG C in 200 seconds.Result of the test is as schemed Shown in 9.This is the experiment proves that the effect of residual air rewarming.

Although the utility model is described above in conjunction with figure, the utility model is not limited to above-mentioned tool Body embodiment, above-mentioned embodiment is only schematical, rather than restricted, the ordinary skill people of this area Member, in the case where not departing from the utility model aims, can also make many variations under the enlightenment of the utility model, these Belong within the protection of the utility model.

Claims (4)

1. a kind of gas throttling type Cryo-surgical apparatus, including high pressure freezing gas circuit, low pressure feeding pneumatic, low pressure pyrogenicity gas circuit, Shunt gas circuit, freezer unit appendix (8) and freezer unit (9)；

The high pressure freezing gas circuit includes：The gases at high pressure input pipe (2) that is sequentially connected with high-pressure air source (1a) gas outlet and cold Freeze gas main (6), the gases at high pressure input pipe (2) is equipped with high pressure air gauge (1b) and high-pressure pressure regulating valve (1c), described Gases at high pressure input pipe (2) and the junction of the frozen gas manifold (6) are equipped with high-pressure limiting valve (5), the gases at high pressure Pipeline section on input pipe (2), between the high-pressure pressure regulating valve (1c) and the high-pressure limiting valve (5) is equipped with the first threeway (3)；

It is characterized in that：

The low pressure feeding pneumatic includes：The residual air delivery outlet (10d) being connected with high pressure residual air source of the gas (10a) and general pressurized air source (11a) connected general pressure delivery outlet (11d), the helium delivery outlet (12d) being connected with helium gas source (12a)；The high pressure residual air gas Source (10a) and the junction of the residual air delivery outlet (10d) are equipped with residual air air gauge (10b) and residual air pressure regulator valve (10c)；It is described The junction of general pressurized air source (11a) and general pressure delivery outlet (11d) is equipped with general pressure air gauge (11b) and general pressure pressure regulator valve (11c)；Institute State helium gas source (12a) and the junction of the helium delivery outlet (12d) is equipped with helium air gauge (12b) and helium pressure regulator valve (12c)；

The low pressure pyrogenicity gas circuit includes：Low pressure confluence tracheae (20) and pyrogenicity gas main (24), the low pressure confluence tracheae (20) one end is low-pressure gas input port (18), the residual air delivery outlet (10d), the general pressure delivery outlet (11d) and described It is to be detachably connected between helium delivery outlet (12d) and the low-pressure gas input port (18)；The low pressure confluence tracheae (20) the other end is connected with the pyrogenicity gas main (24)；The low pressure confluence tracheae (20) is equipped with low-voltage solenoid valve (19) converge with low pressure pressure limiting valve (21), the low pressure on tracheae (20), positioned at the low-voltage solenoid valve (19) and the low pressure Pipeline section between pressure limiting valve (21) is equipped with the second threeway (4)；

Shunting tracheae (13) is connected between first threeway (3) and second threeway (4), it is described to shunt on tracheae (13) Equipped with solenoid diverter valve (14), the shunting tracheae (13) and the solenoid diverter valve (14) constitute the shunting gas circuit；

The freezer unit appendix (8) is connected to the end of the frozen gas manifold (6) and the pyrogenicity gas main (24) End between, and the freezer unit air inlet pipe (9a), the freezer unit air inlet pipe (9a) are connected to by the 4th threeway (26) It is connected with the freezer unit (9)；On the freezer unit appendix (8), positioned at the end of the frozen gas manifold (6) with it is described Pipeline between 4th threeway (26) is equipped with freezer unit freezing solenoid valve (7), on the freezer unit appendix (8), positioned at institute The pipeline stated between the end of pyrogenicity gas main (24) and the 4th threeway (26) is equipped with freezer unit heating electromagnetic valve (25)；

The end of the pyrogenicity gas main (24) is equipped with gas heater (23)；

The freezer unit appendix (8) is located between freezer unit freezing solenoid valve (7) and freezer unit heating electromagnetic valve (25) Pipeline section on there is the 4th threeways (26) of multiple series connection, each 4th threeway (26) is respectively connected with freezer unit Air inlet pipe (9a), the freezer unit air inlet pipe (9a) are connected with freezer unit (9).

2. a kind of gas throttling type Cryo-surgical apparatus, including high pressure freezing gas circuit, low pressure feeding pneumatic, low pressure pyrogenicity gas circuit, Shunt gas circuit, freezer unit appendix (8) and freezer unit (9)；

The high pressure freezing gas circuit includes：The gases at high pressure input pipe (2) that is sequentially connected with high-pressure air source (1a) gas outlet and cold Freeze gas main (6), the gases at high pressure input pipe (2) is equipped with high pressure air gauge (1b) and high-pressure pressure regulating valve (1c), described Gases at high pressure input pipe (2) and the junction of the frozen gas manifold (6) are equipped with high-pressure limiting valve (5), the gases at high pressure Pipeline section on input pipe (2), between the high-pressure pressure regulating valve (1c) and the high-pressure limiting valve (5) is equipped with the first threeway (3)；

It is characterized in that：

The low pressure feeding pneumatic includes：The residual air delivery outlet (10d) being connected with high pressure residual air source of the gas (10a) and general pressurized air source (11a) connected general pressure delivery outlet (11d), the helium input pipe (15) being connected with helium gas source (12a)；The high pressure residual air source of the gas (10a) and the junction of the residual air delivery outlet (10d) are equipped with residual air air gauge (10b) and residual air pressure regulator valve (10c)；It is described general The junction of pressurized air source (11a) and general pressure delivery outlet (11d) is equipped with general pressure air gauge (11b) and general pressure pressure regulator valve (11c)；It is described Helium input pipe (15) is equipped with helium air gauge (12b), helium pressure regulator valve (12c), helium solenoid valve (16) and helium pressure limiting Valve (17)；

The low pressure pyrogenicity gas circuit includes：Low pressure confluence tracheae (20) and pyrogenicity gas main (24), the low pressure confluence tracheae (20) one end is low-pressure gas input port (18), the residual air delivery outlet (10d) and the general pressure delivery outlet (11d) with it is described Low-pressure gas input port is to be detachably connected between (18)；The other end of the low pressure confluence tracheae (20) passes through the 3rd threeway (22) it is connected with the pyrogenicity gas main (24), meanwhile, the helium input pipe (15) is connect by the 3rd threeway (22) Enter pyrogenicity gas main (24)；

The low pressure confluence tracheae (20) is equipped with low-voltage solenoid valve (19) and low pressure pressure limiting valve (21), the low pressure confluence tracheae (20) on：The second threeway (4) is equipped with the pipeline section between the low-voltage solenoid valve (19) and low pressure pressure limiting valve (21), Positioned at the low pressure pressure limiting valve (21)

Shunting tracheae (13) is connected between first threeway (3) and second threeway (4), it is described to shunt on tracheae (13) Equipped with solenoid diverter valve (14), the shunting tracheae (13) and the solenoid diverter valve (14) constitute the shunting gas circuit；

The freezer unit appendix (8) is connected to the end of the frozen gas manifold (6) and the pyrogenicity gas main (24) End between, and freezer unit air inlet pipe (9a), the freezer unit air inlet pipe (9a) and institute are connected to by the 4th threeway (26) Freezer unit (9) is stated to be connected；On the freezer unit appendix (8), positioned at the end and the described 4th of the frozen gas manifold (6) Pipeline between threeway (26) is equipped with freezer unit freezing solenoid valve (7), on the freezer unit appendix (8), positioned at the cause Pipeline between the end of hot gas manifold (24) and the 4th threeway (26) is equipped with freezer unit heating electromagnetic valve (25)；

The end of the pyrogenicity gas main (24) is equipped with gas heater (23)；

The freezer unit appendix (8) is located between freezer unit freezing solenoid valve (7) and freezer unit heating electromagnetic valve (25) Pipeline section on there is the 4th threeways (26) of multiple series connection, each 4th threeway (26) is respectively connected with freezer unit Air inlet pipe (9a), the freezer unit air inlet pipe (9a) are connected with freezer unit (9).

3. gas throttling type Cryo-surgical apparatus according to claim 1 or claim 2, it is characterised in that the freezer unit appendix (8), freezer unit freezing solenoid valve (7), the freezer unit heating electromagnetic valve (25), the 4th threeway (26), it is described into Tracheae (9a) and the freezer unit (9), which constitute, is connected to frozen gas manifold (6) ends and the pyrogenicity gas main (24) the component A between end；It is in parallel between frozen gas manifold (6) ends and pyrogenicity gas main (24) end There are multiple component A.

4. gas throttling type Cryo-surgical apparatus according to claim 1 or claim 2, it is characterised in that the freezer unit (9) is profit The gas throttling refrigeration type freezer unit of low temperature is produced with the Joule-Thomson throttle effect of gas.