164 results about "Carbon dioxide cylinder" patented technology

The invention belongs to the technical field of plant growing box control, and discloses a plant growing box control system and a control method thereof. The plant growing box control system comprises a cultivation chamber and an environment control chamber. The cultivation chamber is provided with a cultivation frame, the bottom of each layer of the cultivation frame is provided with a water groove, and the water groove at each layer is internally provided with a planting plate. The cultivation chamber is internally provided with an in-box temperature and humidity sensor and a carbon dioxide concentration sensor. The environment control chamber is internally provided with a constant temperature and constant humidity machine and a carbon dioxide steel cylinder. A supplying pipeline of the carbon dioxide steel cylinder is provided with a carbon dioxide steel solenoid valve. The top of each layer of the cultivation frame is provided with an LED lamp. The bottom of the cultivation chamber is provided with a nutrient solution water box and a circulating pump. The environment control chamber is internally provided with a general control unit, the in-box temperature and humidity sensor and the carbon dioxide concentration sensor are respectively and electrically connected with the general control unit which is electrically connected with the control end of the carbon dioxide solenoid valve, and the general control unit is used for controlling the operating state of the constant temperature and constant humidity machine, the LED lamps and the circuiting pump.

The invention relates to a manual simulation plant climate box, which comprises a box body and an equipment room, wherein the equipment room is located at the back side of the box body; the box body is constituted of a top cover, a base plate and a side plate; an electrical box, a refrigerating unit, a humidifier and a carbon dioxide steel cylinder are set in the equipment room; the box body is also provided with a camera, an ultraviolet ray lamp tube, a sensor unit, a plant cultivation frame and an air processor; an air flow channel is set between a top plate and the top cover and the air flow channel is shaped like a long strip; the top plate is provided with an inserted buckle; an inserted-type light-supplementing lamp bar is mounted in the inserted buckle; and a top plate at the outskirt of the inserted-type light-supplementing lamp bar is provided with a ventilation hole. The advantages are that comprehensive simulation to natural environment or specified environment is performed; each of factor is controlled separately and also coordinated as a whole; specified light strength, temperature, humidity and carbon dioxide concentration can be acquired; the best growth environment of plants in each stage inside the box body can be simulated; and comparative test can be performed by controlling certain environmental factors.

The invention discloses a device for measuring the permeability of rock in a fracturing process. The device comprises a triaxial test chamber (1), a core gripping device, a carbon dioxide cylinder (2), a flow monitoring device, a hydraulic oil confining pressure loading system (3) and a computer (4), wherein the hydraulic oil confining pressure loading system (3) comprises an oil pump, a booster pump and an oil tank; the core gripping device comprises a core gripper (11), an air cushion (12), an insulating self-adhesive sealing tape (13) and a thermal shrinkable sleeve (14); an air inlet (15) connected with an air inlet valve (9) and an air outlet (16) connected with an air outlet valve (10) are formed in the upper end and the lower end of the core gripper (11) respectively; the carbon dioxide cylinder (2) is connected with the air inlet valve (9); and the flow monitoring device comprises a glass burette (17) and a rubber hose (18). The invention further discloses a measuring method. The device provided by the invention has the beneficial effects of convenience and easiness in refitting, safety and simplicity in operation, small measuring error, high working efficiency and high utilization ratio of carbon dioxide.

The invention provides a device for producing microparticles by supercritical fluid auxiliary spray. The device consists of a carbon dioxide cylinder, a cooling water tank, a valve, a plunger pump, a heater, a gas-liquid mixing chamber, a pressure monitoring system, a heating jacket, a valve, a nozzle base, a drying box, a valve, a constant flow pump, a solvent storage tank, a heating jacket, a cyclone separator, a collection tank, an air pump, an air heater, a supercritical carbon dioxide storage tank, an air filter and a nozzle. The device provided by the invention can be applied to the preparation of pharmaceutical microparticles or nanoparticles, and drug-loaded microparticles or nanoparticles containing carriers. The device is characterized by reasonable design and low cost and adopts the integrated insulation design of the gas-liquid mixing chamber and the nozzle, which can reduce the nozzle temperature drop caused by the injection of the mixture of carbon dioxide and solvent, can ensure the spray to go smoothly; can decrease the change of particle sizes caused by temperature fluctuation, can continuously, efficiently and conveniently prepare and collect microparticles, and can be applicable to industrialized continuous production.

The invention discloses a test method of supercritical carbon dioxide content in coal. A determination device consisting of a vacuum pump, a coal sample tank, a carbon dioxide cylinder, a pressure device and a high-accuracy balance is used in the test method. The test method comprises the following steps of calculating the quantity of gas filled into an adsorption tank by measuring the mass variation of the adsorption tank, substracting the gas phase content increased in a free space of the adsorption tank to obtain the excess adsorption quantity of a coal sample under balance pressure, and calculating the gas phase carbon dioxide content in a coal pore by utilizing a non-ideal gas equation according to the pore pressure. The supercritical carbon dioxide content in coal is a sum of the excess adsorption quantity and the gas phase content of the pore space in coal, tests of a plurality of balance pressures can be finished by measuring carbon dioxide contents in the coal sample under different balance pressures. The test method has the advantages of simpleness and low requirement to an instrument and equipment, can accurately and conveniently measure the carbon dioxide content in coal and is beneficial to test research on the carbon dioxide content in coal.

Carbon dioxide is supplied from a carbon dioxide cylinder (15) to a pressure vessel (13) through reducing valves (18 and 19). The pressure vessel (13) is also supplied with a sodium hypochlorite water solution having a desired concentration through a material supply pipe (12). The material supply pipe (12) is connected to first and second branch pipes (100 and 101) through a distribution valve (102). The sodium hypochlorite water solution supplied through the material supply pipe (12) is partially sprinkled to a gas-phase region in the pressure vessel (13) through the first branch pipe 100, while the remainder of the sodium hypochlorite water solution is supplied to a liquid-phase region in the pressure vessel (13) through the second branch pipe (101). The pressure vessel (13) is provided with a liquid level retention mechanism (25 to 29) is provided to retain the liquid level in the pressure vessel (13) within a constant range. Sterile water produced in the pressure vessel (13) is delivered through a discharge pipe (31) incorporating a throttle valve (42). The pH value of the sterile water is detected by a pH sensor, and the distribution valve (102) is controlled until the detected pH value coincides with an intended pH value.

The invention relates to an apparatus used for measuring the diffusion coefficient of carbon dioxide in rock. The apparatus comprises an apparatus housing. A gas tank, a diffusion cylinder and a fluid tank are arranged vertically in parallel in the apparatus housing. A gas pipeline and a liquid pipeline are arranged outside the apparatus housing. The inlet of the gas pipeline is connected to a carbon dioxide cylinder through a booster pump. A four-way valve is arranged in series on the gas pipeline. The gas outlets of the four-way valve are respectively connected to the four-way valve, the gas tank, and a pressure sensor. The inlet of the liquid pipeline is connected with a sample tank. A four-way valve is arranged in series on the liquid pipeline. The liquid outlets of the four-way valve are respectively connected to the four-way valve, the fluid tank, and a pressure sensor. According to the invention, a gas chamber is eliminated fundamentally, and the influence caused by sampling upon the gas pressure is eliminated. Vacuum pumping, saturated formation fluid and the determination of gas diffusion coefficient are integrated. Therefore, the influences on the saturated fluid in rock during the vacuum pumping process are completely eliminated.

The invention provides a supercritical carbon dioxide dyeing method, which includes the following steps: 1) winding a fabric on a distributing rack and hung in a high-pressure dyeing kettle, unscrewing a kettle cover to feed in a certain amount of filter cakes and screwing the kettle cover; 2) adjusting the temperature and pressure on the control panel to object values, opening a condensing device to start a carbon dioxide steel cylinder to feed gas into a system, pressurizing the system by starting a plunger pump after the steel cylinder pressure and the system pressure are balanced, and starting a circulating pump to enable the fluid in the system to be circulating; 3) timing the dyeing after the pressure and temperature reach the preset values; 4) opening a reducing valve to release pressure after the dyeing set time is balanced under the temperature and pressure, enabling the carbon dioxide to be recovered into the steel cylinder through a separating kettle, and discharging the remaining carbon dioxide after the pressure in the steel cylinder and the system is balanced; and 5) opening the dyeing kettle after the system is cooled to the room temperature, so as to take out the dyed fabric. The dyeing process is environment-friendly, energy-saving, water-saving, economical and efficient.

The invention discloses an automatic floating device for an underwater hull attachment cleaning robot. The automatic floating device comprises a robot body, gasbags are arranged on two sides of the robot body, the outer surface of each gasbag is a nylon rubber layer, a gas charging valve is connected to one sides of the gasbags, one side of the gas charging valve is connected with a carbon dioxide cylinder, the other side of the gas charging valve is connected with a gas extracting pump, and the other side of one gasbag is connected with a vent valve. The automatic floating device has the advantages of simple structure, safety, reliability, low equipment input cost and high working efficiency.

A refrigerator includes a carbonated water tank in which carbonated water is stored; a water level sensor sensing a water level of carbonated water stored in the carbonated water tank; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by the water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If the carbonated water is discharged, the controller controls the water level sensor to sense the water lever of the carbonated water stored in the carbonated water tank.

The invention provides a device for removing pesticide residue from plant by supercritical carbon dioxide, and the device is characterized by comprising an extraction kettle, a fractionation column, a separation kettle, a purifier, a carbon dioxide storage pot, a steel carbon dioxide bottle, a plurality of control valves, a cooling heat exchanger, a high pressure pump, a heating heat exchanger, and a filler. An air outlet pipe at the upper part of the separation kettle is connected with the purifier which is connected with the carbon dioxide storage pot. A removal method comprises a combination technique of supercritical carbon dioxide extraction and supercritical carbon dioxide fractionation. The device can be used for purifying the recycled supercritical CO2 to overcome the ignorance about a trace of the pesticide residue carried by the supercritical CO2 in the recycling in the industry and reduce the pesticide residue in the oil to the largest extent. Compared with the prior art, the device provided by the invention has the characteristics that the removal efficiency is high, the solvent carbon dioxide is odorless, tasteless and free of pollution, the operation is simple and automatic, the low-temperature extraction and physical fractionation are likely to protect active elements in the oil from destruction, and the pesticide residue after the removal is less than the state-specified maximum pesticide residue content in edible vegetable oil.

Provided is a refrigerator including: a carbonated water tank in which carbonated water is stored; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by a water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If it is expected that the storage amount of the carbonated water is reduced or the user won't use the carbonated water for a while, carbonated water is automatically produced so that the user is not required to wait while the carbonate water is produced.

The invention provides an anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, belonging to the field of safe lifesaving and environmental control in confined spaces. The system comprises a carbon dioxide steel cylinder (1), a stop valve (3), a first level throttling valve (4), a first level evaporator (5), a second level throttling valve (6), a second level evaporator (7) and a three-way change valve (8) in sequence, wherein a fist end of the three-way change valve (8) is connected with the second level evaporator (7), a second end of the three-way change valve (8) is connected with a pneumatic fan (9) and a third end of the three-way change valve (8) is connected with a compressed air steel cylinder (10). Due to taking the twice throttling and two level refrigeration measures, the system improves the evaporation temperature of the first level evaporator (5) and the second level evaporator (7), ensures that the evaporation temperature is higher than the freezing point of water, and prevents the icing plug of pipelines and the frosting of the evaporators; and the compressed air steel cylinder (10) is used for driving the pneumatic fan (9) to carry out auxiliary defrosting in extreme cases, thus improving the reliability of the system running.

The invention discloses an enhanced geothermal system development test device. The enhanced geothermal system development test device comprises a carbon dioxide steel cylinder, a carbon dioxide supercritical transportation device, a simulation hot dry rock reactor, a carbon dioxide turbine, a high-pressure frequency conversion type plunger pump, and a PLC data acquisition system. Carbon dioxide in the carbon dioxide steel cylinder passes through a carbon dioxide flow regulating valve and a pressure regulating valve, enters the carbon dioxide supercritical transportation device for being pressurized to a high pressure, and then enters the simulation hot dry rock reactor for temperature rise. The high-temperature high-pressure carbon dioxide CO2 after temperature rise enters the carbon dioxide turbine. The carbon dioxide turbine is used to drive a generator or a power machine for energy conversion. The low-grade carbon dioxide coming out from the carbon dioxide turbine enters the heat exchanger. The carbon dioxide after heat exchange is sent back to the simulation hot dry rock reactor through the high-pressure frequency conversion type plunger pump for cyclic utilization.

The invention relates to a device and a method for drying food by supercritical carbon dioxide. In a device consisting of a carbon dioxide steel cylinder, a purifier, a refrigerating system, a high-pressure pump, a heater, a drying chamber, a drying agent reaction chamber, a carrying agent storage tank, a pump and a valve, fresh food materials are sliced into slices, the slices are put on a stainless steel screen mesh of the drying chamber, and the drying chamber is sealed; and dried carbon dioxide is introduced to the drying chamber, and is heated under the pressure, so that the carbon dioxide is in the supercritical state to dry the food. The device is suitable for drying vegetables and fruit slices (carrot slices, potato slices, apple slices and the like), and is also suitable for drying fillets. The device and the method have the advantages of simple process flow, high drying efficiency and high quality of products.

The invention discloses a high-temperature and high-pressure water-rock reaction and gas permeability integrated testing device. The high-temperature and high-pressure water-rock reaction and gas permeability integrated testing device comprises that the inside of a thermostatic tank is provided with a rock core clamp and a piston container which are connected with each other; one end of a gas booster pump is connected with a nitrogen cylinder, a carbon dioxide cylinder and a sulfurous gas cylinder, and the other end of the gas booster pump is connected with the piston container; a double-cylinder constant-pressure and constant-flow pump is connected with the piston container; both ends of a stratum water sample container are connected with a liquid booster pump and the rock core clamp respectively to fill stratum water samples into the rock core clamp; a confining pressure pump is connected to the lower end of the rock core clamp, and the upper end of the rock core clamp is provided with a confining pressure release pump. The high-temperature and high-pressure water-rock reaction and gas permeability integrated testing device has the advantages of being capable of implementing whole stratum environment simulation, water-rock reaction and rock core gas permeability measurement within one integrated testing device, conveniently, accurately, safely and effectively measuring the change of physical properties of rock before and after water-rock reaction at high-temperature and high-pressure, and providing more data and technical support for practical production.

The invention discloses a supercritical-solvent heat combined device and a method for preparing a nanometer material. The device comprises a carbon dioxide steel bottle, a carbon dioxide cooler, a carbon dioxide pump, an entrainer accommodator, an entrainer pump, a first valve, a second valve, a third valve, a secondary reactor, a fourth valve, a main reactor, a fifth valve and a separator. The device can realize a plurality of supercritical-solvent heat combined preparation methods, and can satisfy the preparation of the nanometer material and the demands of controlling such crystal growth behaviors as crystal transfer, grain size and morphology evolution of an inorganic nanometer material through splicing pipelines and modules and adjusting such conditions or parameters as valve switch combinations, raw material placing mode and entrainer entering mode. The device has such advantages as simplicity and convenience for operation, wide adjusting range of experimental parameters, strong stability and high productivity, has huge application potential in the research, preparation and application fields of the nanometer material, and has wider industrialization foreground.

The invention discloses a leafy vegetable atomizing cultivation device, which comprises a cultivation system, a nutrient solution atomizing reflux system, a temperature and humidity control system, anillumination control system, a carbon dioxide supply system and an airflow circulation system, wherein the cultivation system comprises a plurality of cultivation pipes arranged in the box body; thenutrient solution atomizing reflux system comprises a nutrient solution storage groove, an ultrasonic sprayer, a nutrient solution conveying pipeline, an aerosol pipeline and a reflux pipeline; the temperature and humidity control system comprises a hot and cold air conditioner, an atomizing machine and a temperature and humidity sensor; the illumination control system comprises a plant growth lamp and an illumination intensity sensor; the carbon dioxide supply system comprises a carbon dioxide steel cylinder, a conveying pipeline and a carbon dioxide sensor; and the air circulation system comprises an axial flow ventilation fan. The temperature, humidity, illumination intensity, carbon dioxide concentration and the like in the whole process of seedling raising and growth of leafy vegetables can be automatically adjusted, control is carried out according to the actual growth condition of the leafy vegetables, and the growth of the leafy vegetables is accelerated.

The invention discloses a method for preparing ginkgo leaf extract powder by drying supercritical fluid and a device thereof. The method comprises the following steps: placing alcoholic solution of ginkgo leaf extract without impurity into a sealed dry chamber cylinder body, and then introducing carbon dioxide into the solution at a flow speed of 20 to 45 liters per hour, wherein temperature of the carbon dioxide is between 0 and 5 DEG C; controlling pressure of the dry chamber cylinder body at 10 to 30MPa and temperature of between 35 and 75 DEG C; and after the carbon dioxide becomes stable supercritical fluid, continuously displacing and drying the fluid for 4 to 8 hours to finally obtain light-yellow dry finished powder of the ginkgo leaf extract. The device comprises a carbon dioxide steel bottle, a gas-liquid separation container, a gas cooling unit, a transition container, a carbon dioxide transfer pump, a heater, the dry chamber cylinder body, a first-stage separation cylinder body, a second-stage separation cylinder body, valves and pipelines, and the components are mutually connected through the valves and the pipelines. The content of flavone in obtained power is more than 25 weight percent, the alcoholic solution in the extract can be reclaimed, and the carbon dioxide can also be recycled.

The invention provides a pipeline leakage diffusion simulation experimental table for an underground utility tunnel model pipeline, comprising: a tunnel model pipeline. The upper portion of one end ofthe tunnel model pipeline is provided with an intake well, the intake well is communicated with a carbon dioxide cylinder, the tail end of the tunnel model pipeline is provided with an exhaust well,the exhaust well discharges carbon dioxide gas from the tunnel model pipeline into outdoor air, a leak hole is drilled in the middle bottom of the tunnel model pipeline, a leak point needle is inserted into the leak hole, the leak point needle is connected with a nitrogen cylinder through a gas pipe and an electromagnetic valve, the side of the tunnel model pipeline is provided with a plurality ofgas sampling holes, and gas sampling devices are fixed to a front longitudinal member of the tunnel model pipeline through screws and are inserted into the gas sampling holes to sample gas in the gassampling holes. The pipeline leakage diffusion simulation experimental table for the underground utility tunnel model pipeline can simulate pipeline leakage in the underground utility tunnel model pipeline, and leaking gas is automatically sampled via the gas sampling devices.

The invention relates to a fresh aquatic product constant temperature realizing method for a vehicle-mounted container. A management area, an equipment monitoring area, a liquid oxygen and carbon dioxide cylinder fixation area, a fish box fixation area and an equipment area are arranged in a container body, and in the equipment area, all equipment, pipelines, instruments and the like which contact with the water in a fish box are required to be protected from seawater corrosion, wherein a cold water pipeline system connects refrigerating system pipelines and a fish box together, a water-water heat exchanger is arranged in a dissolved oxygen cylinder and is used for cooling the water in the fish box in summer and heating the water in the fish box in winter, a water temperature control system can control the water temperature of the fish box accurately and carry out real-time monitoring, and a safety protection device of the system is set to ensure safe transport. The method comprises the design of a heat exchanger between the cold water in a refrigerating system and the water in the fish box, the design of a cold water pipeline system, the design of a cold water flow control system, the design of water temperature automatic control system, and the like. The success in the development of the vehicle-mounted dual-purpose container refrigerating system makes the prospect of south fish to north and north fish to south possible. Once industrialized demonstration is formed, the invention is expected to bring significant economic and social benefits.

The invention discloses a chemical experiment table for automatic fire extinguishing in case of a high temperature in a chemical laboratory. The chemical experiment table comprises a chemical experiment table, a support frame, drawers and handles, wherein the chemical experiment table comprises a table body, expansion mechanisms, driving mechanisms, fire extinguishing mechanisms, vent pipes, and horizontal spraying mechanisms. Heat collection plates on the surface of the chemical experiment table are used to collect the ambient temperature; and when the ambient temperature reaches a certain degree, compressed gas bags on the expansion mechanisms expand and push the driving mechanisms to operate, the driving mechanisms then open connection pipes in the fire extinguishing mechanisms throughstay cords, gas in carbon dioxide cylinders serves as a power source to push powders from fire extinguishers into horizontal spraying barrels, and gas guiding sheets impacted by gas flows further drive the horizontal spraying barrels to rotate in whole to extinguish fire on the surface of the chemical experiment table and around the chemical experiment table, so that automatic fire extinguishing in case of the high temperature is achieved.

The invention provides an operating device for anaesthetizing active insects. The device comprises a carbon dioxide cylinder (6), an operating table (2) and a pressure gun (4), wherein the operating table (2) and the pressure gun (4) are connected with the carbon dioxide cylinder (6) respectively. The operating device for anaesthetizing the active insects of the invention utilizes the principle that stigmas of a majority of insects are temporarily closed to in an anaesthetized and unconscious state in a high-concentration carbon oxide environment for the convenient observation or technical operation of the active insects; and the anaesthetized insects may revive naturally when moved to an environment without carbon oxide. The operating device has the advantages of avoiding the damage to the interior of an insect body and the adverse impact on a human body possibly caused by using the conventional ether for anaesthetizing the active insects and reducing indoor noxious solvent contamination.

This invention discloses a CO2 liquid fertilizer containing 0.14% CO2 concentration and pH=6.0 including the following weight ratio formula: CO2 0.14%, KHCO3 0.005%, Mg(HCO3)2 0.005% and water. The preparation method includes: putting a liquid CO2 cylinder produced by plant slowly into a water tank filled with clean water to produce CO2 solution approaching saturation.

The invention discloses a newborn heel blood collection assistant device which comprises a carbon dioxide cylinder, a steam generator and a pneumoperitoneum machine body. Carbon dioxide is stored in the carbon dioxide cylinder, a carbon dioxide outlet is arranged on the carbon dioxide cylinder, and a switch and a pressure regulating valve are arranged at the carbon dioxide outlet; a steam port is arranged on the steam generator, a steam regulating button is arranged on the steam generator, the pneumoperitoneum machine body is a bilayer shell comprising an inner shell and an outer shell, the outer shell sleeves the inner shell, two ends of the outer shell are connected with the inner shell, a containing cavity is formed between the outer shell and the inner shell, a carbon dioxide incoming tube extending outwards is arranged on the inner shell, a steam nozzle is arranged on the side wall of the inner shell, a mixed gas outlet is formed in the inner shell, a steam connection tube is arranged on the side wall of the outer shell, and the end of the steam connection tube is communicated with the steam port of the steam generator. The device can provide carbon dioxide gas having temperature and humidity.

A refrigerator having a carbonated water production device, according to one concept of the present invention, comprises: a pressure regulator for adjusting and emitting the pressure of carbon dioxide emitted from a carbon dioxide cylinder; a solenoid switch valve for controlling the supply of the carbon dioxide discharged from the pressure regulator to a carbonated water tank; a connection channel for connecting the pressure regulator and the solenoid switch valve; and a relief valve arranged in the connection channel so as to discharge the carbon dioxide of the connection channel to the atmosphere if the pressure of the carbon dioxide of the connection channel is greater than a predetermined pressure limit. Thus, the pressure of the carbon dioxide of the connection channel is capable of being maintained at a predetermined pressure limit or less, and solenoid malfunction can be prevented so as to improve reliability and stability of a system.

The invention belongs to the technical field of supercritical carbon dioxide jet, and discloses a formation method and device of self-excited oscillation supercritical carbon dioxide jet. The device includes a carbon dioxide gas supply system, a cooling liquefaction system, a pressurization system, a temperature rise system, an experimental system, a filtering system, a recovery system and a control system, and particularly includes a high-pressure carbon dioxide cylinder, a cold bath box and an air-cooled compressor, a liquid carbon dioxide storage tank, a high-pressure plunger pump, a hot bath box, a heating buffer tank, a circulating pump, an experimental kettle, at least two desambers, purifiers and control cabinets. According to the device, supercritical carbon dioxide is prepared byusing the systems, an improved self-excited oscillation nozzle is used for producing the self-excited oscillation supercritical carbon dioxide jet, impact force of the self-excited oscillation jet is1.5-2.5 times of stagnation pressure of continuous jet, the impact damage effect of the jet can be enhanced, and the self-excited oscillation supercritical carbon dioxide jet can obtain the better rock breaking and erosion effect and has broad prospects in unconventional oil and gas development.