Gas throttle type cryosurgical device and method for controlling same
A gas throttling and surgical technology, which is used in cooling surgical instruments, medical science, cooling appliances for treatment and treatment, etc., can solve the problems of dependence on imports, high cost, limited heating capacity of helium gas, etc., to reduce requirements and use costs. Effect
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Embodiment 1
[0066] Embodiment 1: as figure 1 As shown, a gas throttling cryosurgical device of the present invention includes a high-pressure freezing gas circuit, a low-pressure gas supply gas circuit, a low-pressure heating gas circuit, a split gas circuit, a refrigerator gas delivery pipe 8 and a refrigerator 9 .
[0067] The high-pressure refrigerated gas circuit includes a high-pressure gas input pipe 2 and a refrigerated gas main pipe 6 connected in sequence to the outlet of the high-pressure gas source 1a. The high-pressure gas input pipe 2 is provided with a high-pressure air pressure gauge 1b and a high-pressure pressure regulating valve 1c. The connection between the high-pressure gas input pipe 2 and the refrigerated gas main pipe 6 is provided with a high-pressure pressure limiting valve 5; The pipe section between is provided with the first tee 3.
[0068]The low-pressure gas supply circuit includes: a residual gas output port 10d connected to the high-pressure residual gas ...
Embodiment 2
[0085] Embodiment 2: as figure 2 As shown, on the basis of the above-mentioned embodiment 1, a gas heater 23 is arranged on the pipeline between the low pressure limiting valve 21 and the refrigerator heating solenoid valve 25 on the heating gas main pipe 24, so that the low pressure The rewarming gas is preheated before entering the freezer, thereby enhancing the effect of rewarming and heating.
[0086] The control method implemented in Example 2 includes freezing mode and rewarming mode, and the rewarming modes can be divided into (1) split flow rewarming mode, (2) residual gas rewarming mode, (3) general pressure according to the source of rewarming gas The control process of the rewarming mode, (4) throttling rewarming mode and (5) exhaust reheating mode is basically the same as the corresponding method in embodiment 1, except that the gas heater 23 introduced can directly preheat the low pressure The gas is input into the refrigerator, which breaks through the heating ...
Embodiment 3
[0087] Embodiment 3: as image 3 As shown, the gas throttling type cryosurgical device is similar to the basic structure of the above-mentioned embodiment 1, the difference is that the helium passage in this embodiment is separated from other low-pressure gas passages, and an independently controlled helium solenoid valve and a helium limiter are set. Pressure valve, that is, helium is connected to an independent helium inlet pipe 15 from the helium source 12a, and its other end is connected to the heating gas main pipe 24 at the third tee 22, and the helium inlet pipe 15 is provided with the helium pressure gauge 12b, the helium pressure regulating valve (12c), the helium solenoid valve 16 and the helium pressure limiting valve 17 in sequence.
[0088] In Embodiment 3, the independent helium pressure limiting valve 17 is set to limit the pressure to the working pressure (6.9 MPa) of helium throttling heating. The rest of the low-pressure rewarming gas can be limited to any p...
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