Disclosure of Invention
In order to solve the problems of low freezing efficiency, inaccurate temperature control, poor adaptability of a resistance breaking freezing pen, long operation time and the like of the traditional freezing electric blocking system, the invention provides a safe and efficient freezing resistance breaking system which comprises a host machine and a resistance breaking freezing pen; the host comprises a man-machine interaction component, a main controller, a power supply, an air path control component, a pressure regulating component, a heating module and a temperature acquisition component; the resistance breaking freezing pen comprises a gas path part, a miniature heat exchanger, a temperature measuring sensor and a heating device; the power supply is respectively and electrically connected with the man-machine interaction component and the main controller; the main controller is respectively and electrically connected with the man-machine interaction component, the gas circuit control component, the heating module and the temperature acquisition component; the input end of the pressure regulating component is connected with an external refrigerant source and a heating medium source, and the output end of the pressure regulating component is connected with the input end of the gas circuit control component; the output end of the air path control component is connected with the input end of the air path part; the heating module is electrically connected with the heating device; the temperature acquisition component is electrically connected with the temperature measurement sensor; the output end of the air path part is connected with the miniature heat exchanger.
The main controller comprises a power supply module, a memory, a CPU, a first I/O interface module, a first optical coupler, a second optical coupler, an A/D collector, a level conversion transceiver, a transistor, a first level interface module, a serial communication interface module, an isolation transmitter and a solid state relay group; the power supply module is respectively and electrically connected with the power supply, the memory, the CPU and the first I/O interface module, the CPU is respectively and electrically connected with the memory, the first I/O interface module, the first optical coupler, the second optical coupler and the A/D collector, the first optical coupler is electrically connected with the first level interface module, the second optical coupler is electrically connected with the serial communication interface module, the A/D collector is electrically connected with the isolation transmitter, the first I/O interface module is respectively and electrically connected with the level conversion transceiver and the transistor, the level conversion transceiver is electrically connected with the solid state relay group, the transistor is electrically connected with the heating module, the isolation transmitter and the solid state relay group are electrically connected with the gas circuit control part, the serial communication interface module is electrically connected with the man-machine interaction part, and the first level interface module is electrically connected with the temperature acquisition part.
The gas circuit control component is a gas circuit component with two paths of branches and comprises a refrigerant gas interface, a first particle filter, an exhaust electromagnetic valve, an exhaust interface, a first pressure sensor, a refrigerant main electromagnetic valve, a first water vapor filter, a second pressure sensor, a first refrigerant branch electromagnetic valve, a first gas output interface, a second refrigerant branch electromagnetic valve, a second gas output interface, a heating medium gas interface, a second particle filter, a heating medium main electromagnetic valve, a second water vapor filter, a first heating medium branch electromagnetic valve, a first one-way valve, a second heating medium branch electromagnetic valve and a second one-way valve; the input end of the refrigerant gas interface is connected with an external refrigerant gas source through the pressure regulating component, the output end of the refrigerant gas interface is connected with the inlet of the first particulate filter, the outlet of the first particulate filter is connected with the inlet of the exhaust electromagnetic valve, the outlet of the exhaust electromagnetic valve is connected with the exhaust interface, the outlet of the first particulate filter is connected with the inlet of the first pressure sensor, the outlet of the first pressure sensor is connected with the inlet of the refrigerant main electromagnetic valve, the outlet of the refrigerant main electromagnetic valve is connected with the inlet of the first water vapor filter, the outlet of the first water vapor filter is connected with the inlet of the first refrigerant branch electromagnetic valve, the outlet of the first refrigerant branch electromagnetic valve is connected with the first gas output interface, the outlet of the first water vapor filter is connected with the inlet of the second refrigerant branch electromagnetic valve, the outlet of the second refrigerant branch electromagnetic valve is connected with the second gas output interface, and the first pressure sensor and the second pressure sensor are electrically connected with the transmitter; the input end of the heating medium gas interface is connected with the external heating medium gas source through the pressure regulating component, the output end of the heating medium gas interface is connected with the inlet of the second particulate filter, the outlet of the second particulate filter is connected with the inlet of the heating medium main electromagnetic valve, the outlet of the heating medium main electromagnetic valve is connected with the inlet of the second water vapor filter, the outlet of the second water vapor filter is connected with the inlet of the first heating medium branch electromagnetic valve, the outlet of the first heating medium branch electromagnetic valve is connected with the inlet of the first one-way valve, the outlet of the first one-way valve is connected with the first gas output interface, the outlet of the second water vapor filter is connected with the inlet of the second heating medium branch electromagnetic valve, the outlet of the second heating medium branch electromagnetic valve is connected with the inlet of the second one-way valve, and the outlet of the second one-way valve is connected with the second gas output interface; the exhaust electromagnetic valve, the refrigerant total electromagnetic valve, the first refrigerant branch electromagnetic valve, the second refrigerant branch electromagnetic valve, the heating medium total electromagnetic valve, the first heating medium branch electromagnetic valve and the second heating medium branch electromagnetic valve are all electrically connected with the solid relay group.
The temperature acquisition component comprises a second level interface module, an A/D converter, a filter circuit, an electronic switch, a cold end temperature sensor and a second I/O interface module; the second level interface module is electrically connected with the first level interface module, the input end of the filter circuit is electrically connected with the temperature measuring sensor, the output end of the filter circuit is electrically connected with the input end of the electronic switch, the output end of the electronic switch is electrically connected with the A/D converter, the cold end temperature sensor is electrically connected with the A/D converter, the A/D converter is electrically connected with the second level interface module, the input end of the second I/O interface module is electrically connected with the A/D converter, and the output end of the second I/O interface module is electrically connected with the control end of the electronic switch.
Further, an air inlet end of the resistance breaking freezing pen is provided with an electric wire joint and an air joint, the temperature measuring sensor is electrically connected with the temperature acquisition component through the electric wire joint, the heating device is electrically connected with the heating module through the electric wire joint, the air path part is an air transmission pipeline, and an input end of the air transmission pipeline is connected with the first air output interface or the second air output interface through the air joint; the air delivery pipeline is internally provided with an air supply passage and an air return passage, the air supply passage is used for supplying refrigerant or heating medium gas to the front end of the resistance breaking freezing pen, and the air return passage is used for gas backflow; the resistance breaking freezing pen is provided with a handle shell, the miniature heat exchanger is arranged in the handle shell, one end of the handle shell is connected with the output end of the gas transmission pipeline, and the inlet of the miniature heat exchanger is connected with the output end of the gas transmission pipeline; the other end of the handle shell is connected with the resistance breaking freezing pen holder, a protection soft sleeve is sleeved outside the resistance breaking freezing pen holder, and the protection soft sleeve can rotate and move back and forth along the resistance breaking freezing pen holder.
The resistance breaking freezing pen holder comprises a spring tube, an orifice, a resistance breaking freezing pen outer wall, an air supply tube, an electric heating wire and a vacuum heat insulation tube; the spring tube is arranged in the front end of the outer wall of the resistance breaking freezing pen, and can play a role in supporting the tube wall when the outer wall of the resistance breaking freezing pen is bent; the two ends of the spring tube are connected with the wire connector through the electric heating wire; the vacuum heat insulation pipe is arranged in the rear end of the outer wall of the resistance breaking freezing pen; the inlet of the air supply pipe is connected with the outlet of the miniature heat exchanger, and the outlet of the air supply pipe is arranged in the front end of the outer wall of the resistance breaking freezing pen; the air supply pipe is provided with the throttle hole; the temperature measuring sensor and the heating device are both arranged in the resistance breaking freezing pen holder, and are both electrically connected to the wire connector.
The outer wall of the resistance breaking freezing pen is made of aluminum or stainless steel subjected to solution heat treatment or annealing heat treatment, and has good softness and can be bent; the spring tube is a high-density spring or copper tube; the vacuum heat insulation pipe is a double-layer stainless steel pipe and is manufactured by welding through a vacuum brazing technology.
Wherein the refrigerant gas is argon, oxygen, nitrous oxide or carbon dioxide; the heating medium gas is helium, heated nitrous oxide or hot alcohol steam.
The man-machine interaction component consists of a keyboard or a film key and a display, or is a capacitive or resistive touch screen; the temperature sensor is a T-type thermocouple or a temperature-sensitive resistor; the heating device is a spiral heating coil, an electric heating sheet, a silica gel heating film or a ceramic heating tube; the miniature heat exchanger is a copper finned tube.
The serial communication interface module is an RS232 interface, an RS485 interface or an RS422 interface; the first level interface module and the second level interface module are TTL or SPI level interfaces; the transistor is a MOSFET or IGBT type transistor.
According to the refrigeration electric blocking system provided by the invention, the temperature of the working area of the resistance breaking refrigeration pen can be monitored in real time through the temperature acquisition component and the temperature sensor, so that the accurate temperature control is realized, the refrigeration temperature is set and the refrigeration power is regulated according to the requirement, and the refrigeration temperature is lower and the efficiency is high; simultaneously, the device also has two freezing channels, improves the freezing efficiency in multi-part freezing, has two alternative defrosting modes, is simple and easy to operate, has high defrosting efficiency and good effect, and greatly shortens the operation time.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and the examples.
Referring to fig. 1, the present embodiment provides a freeze electricity blocking system including a main body 1 and a resistance breaking freeze pen 2. The host comprises a man-machine interaction component 101, a main controller 102, a power supply 103, a gas circuit control component 104, a pressure regulating component 105, a heating module 106 and a temperature acquisition component 107; the electric blocking freezing pen comprises an air path part 201, a miniature heat exchanger 202, a temperature measuring sensor 203 and a heating device 204. The power supply 103 is electrically connected with the man-machine interaction component 101 and the main controller 102 respectively and is used for supplying power; the main controller 102 is respectively and electrically connected with the man-machine interaction component 101, the gas circuit control component 104, the heating module 106 and the temperature acquisition component 107 to realize information transmission; the input end of the pressure regulating part 105 is connected with an external refrigerant and heating medium air source, and the output end of the pressure regulating part 105 is connected with the input end of the air path control part 104; the output end of the air path control part 104 is connected with the input end of the air path part 201; the heating module 106 is electrically connected with the heating device 204; the temperature acquisition part 107 is electrically connected with the temperature measurement sensor 203; the output end of the air path portion 201 is connected to the micro heat exchanger 202.
In a specific application, the man-machine interaction component can be composed of a keyboard or a film key and a display, or can be a capacitive or resistive touch screen. The man-machine interaction component is electrically connected with the main controller through a serial communication interface, and the serial communication interface can be an RS232 interface, an RS485 interface or an RS422 interface; or the man-machine interaction component carries out information transfer with the main controller in a TTL level or SPI mode. The temperature acquisition component has a temperature acquisition function, can acquire temperature information of a temperature measurement sensor in the resistance breaking freezing pen and environmental temperature information, and transmits the temperature information to the main controller in a TTL level or SPI communication mode. The heating module can supply power to the heating device in the resistance-breaking freezing pen according to the control instruction issued by the main controller. The pressure regulating component is used for reducing pressure of high-pressure gas from an external gas source, and particularly can realize the pressure reduction by regulating the throughput of the gas in unit time through intermittent operation of the electromagnetic valve; because the gas space at the rear end of the electromagnetic valve is constant, the air flow in unit time is high, otherwise, the air pressure is low, and then the control of the gas pressure is realized. The gas path part in the electric blocking freezing pen consists of a gas transmission part and a gas return part. The gas input by the gas transmission part and the returned gas are subjected to heat exchange through the micro heat exchanger so as to realize pre-cooling or pre-heating of the input gas. The temperature sensor in the electric blocking freezing pen is used for collecting temperature information of a working area of the freezing pen, and the temperature sensor can be a T-shaped thermocouple or a temperature-sensitive resistor. The heating device in the electric blocking freezing pen is used for heating the resistance breaking freezing pen, and the heating device can be a spiral heating coil, an electric heating sheet, a silica gel heating film or a ceramic heating tube.
Referring to fig. 2, the main controller of this embodiment includes a power module 1021, a memory 1022, a CPU1023, an I/O interface module 1024, an optocoupler 1025, an optocoupler 1026, an a/D collector 1027, a level conversion transceiver 1028, a transistor 1029, a level interface module 1030, a serial communication interface module 1031, an isolation transmitter 1032, and a solid state relay set 1033. The power supply module 1021 is electrically connected with the power supply 103, the memory 1022, the CPU1023 and the I/O interface module 1024, the CPU1023 is electrically connected with the memory 1022, the I/O interface module 1024, the optocoupler 1025, the optocoupler 1026 and the a/D collector 1027, the optocoupler 1025 is electrically connected with the level interface module 1030, the optocoupler 1026 is electrically connected with the serial communication interface module 1031, the a/D collector 1027 is electrically connected with the isolation transmitter 1032, the I/O interface module 1024 is electrically connected with the level conversion transceiver 1028 and the transistor 1029, the level conversion transceiver 1028 is electrically connected with the solid state relay group 1033, the transistor 1029 is electrically connected with the heating module 106, the isolation transmitter 1032 and the solid state relay group 1033 are electrically connected with the gas path control part 104, the serial communication interface module 1031 is electrically connected with the man-machine interaction part 101, and the level interface module 1030 is electrically connected with the temperature acquisition part 107.
Referring to fig. 3, the gas circuit control component of the present embodiment is a gas circuit assembly with two-way branches, including a refrigerant gas interface 1041, a particulate filter 1042, a gas discharge solenoid valve 1043, a gas discharge interface 1044, a pressure sensor 1045, a refrigerant total solenoid valve 1046, a water vapor filter 1047, a pressure sensor 1048, a refrigerant branch solenoid valve 1049, a gas output interface 1050, a refrigerant branch solenoid valve 1051, a gas output interface 1052, a heat medium gas interface 1053, a particulate filter 1054, a heat medium total solenoid valve 1055, a water vapor filter 1056, a heat medium branch solenoid valve 1057, a check valve 1058, a heat medium branch solenoid valve 1059, and a check valve 1060. The input end of the refrigerant gas interface 1041 is connected with an external refrigerant gas source through the pressure regulating component 105, the output end of the refrigerant gas interface 1041 is connected with an inlet of the particulate filter 1042, an outlet of the particulate filter 1042 is connected with an inlet of the exhaust electromagnetic valve 1043, an outlet of the exhaust electromagnetic valve 1043 is connected with an exhaust interface 1044, an outlet of the particulate filter 1042 is connected with an inlet of the pressure sensor 1045, an outlet of the pressure sensor 1045 is connected with an inlet of the refrigerant master electromagnetic valve 1046, an outlet of the refrigerant master electromagnetic valve 1046 is connected with an inlet of the water vapor filter 1047, an outlet of the water vapor filter 1047 is connected with an inlet of the refrigerant branch electromagnetic valve 1049, an outlet of the refrigerant branch electromagnetic valve 1049 is connected with the gas output interface 1050, an outlet of the water vapor filter 1047 is connected with an inlet of the refrigerant branch electromagnetic valve 1051, an outlet of the refrigerant branch electromagnetic valve 1052, the pressure sensor 1045 and the pressure sensor 1048 are electrically connected with the isolation transmitter 1032; the input end of the heating medium gas interface 1053 is connected with an external heating medium gas source through the pressure regulating component 105, the output end of the heating medium gas interface 1053 is connected with the inlet of the particle filter 1054, the outlet of the particle filter 1054 is connected with the inlet of the heating medium total electromagnetic valve 1055, the outlet of the heating medium total electromagnetic valve 1055 is connected with the inlet of the water vapor filter 1056, the outlet of the water vapor filter 1056 is connected with the inlet of the heating medium branch electromagnetic valve 1057, the outlet of the heating medium branch electromagnetic valve 1057 is connected with the inlet of the one-way valve 1058, the outlet of the one-way valve 1058 is connected with the gas output interface 1050, the outlet of the water vapor filter 1056 is connected with the inlet of the heating medium branch electromagnetic valve 1059, the outlet of the heating medium branch electromagnetic valve 1059 is connected with the inlet of the one-way valve 1060, and the outlet of the one-way valve 1060 is connected with the gas output interface 1052; the exhaust solenoid valve 1043, the refrigerant total solenoid valve 1046, the refrigerant branch solenoid valve 1049, the refrigerant branch solenoid valve 1051, the heat medium total solenoid valve 1055, the heat medium branch solenoid valve 1057, and the heat medium branch solenoid valve 1059 are all electrically connected to the solid relay unit 1033.
Referring to fig. 4, the temperature acquisition component 107 of the present embodiment includes a level interface module 1071, an a/D converter 1072, a filter circuit 1073, an electronic switch 1074, a cold side temperature sensor 1075, and an I/O interface module 1076. The level interface module 1071 is electrically connected with the level interface module 1030, the input end of the filter circuit 1073 is electrically connected with the temperature sensor 203, the output end of the filter circuit 1073 is electrically connected with the input end of the electronic switch 1074, the output end of the electronic switch 1074 is electrically connected with the a/D converter 1072, the cold end temperature sensor 1075 is electrically connected with the a/D converter 1072, the a/D converter 1072 is electrically connected with the level interface module 1071, the input end of the I/O interface module 1076 is electrically connected with the a/D converter 1072, and the output end of the I/O interface module 1076 is electrically connected with the control end of the electronic switch 1074. In practical applications, the electronic switch 1074 may be a single pole double throw or double pole double throw electronic switch; the filter circuit 1073 may be an LC filter circuit, and the filter order may be 2 to 5.
Referring to fig. 5, an air inlet end of the resistive break freezing pen provided in the present embodiment is provided with an electric wire connector 301 and a gas connector 302, and the temperature sensor 203 is electrically connected with the temperature acquisition component 107 through the electric wire connector 301, and is used for acquiring the temperature of the work area of the resistive break freezing pen; the heating device 204 is electrically connected to the heating module 106 through a wire connection 301 for effecting control of the heating device 204. The gas circuit part of the embodiment is a gas transmission pipeline 303, and the input end of the gas transmission pipeline 303 is connected with a gas output interface 1050 or a gas output interface 1052 through a gas connector 302 for transmitting refrigerant or heating medium gas; the gas fitting 302 may be a quick fitting or a screw fitting, and should be capable of withstanding the highest pressures of the refrigerant and heating medium gases. The gas transmission pipeline 303 of the present embodiment has a gas supply passage and a gas return passage, the gas supply passage is used for supplying the refrigerant or the heating medium gas to the front end of the resistive-break refrigeration pen, and the gas return passage is used for gas return. The resistance breaking freezing pen of the embodiment is provided with a handle shell 304, a miniature heat exchanger 202 is arranged in the handle shell 304, one end of the handle shell 304 is connected with the output end of a gas pipeline 303, and the inlet of the miniature heat exchanger 202 is connected with the output end of the gas pipeline 303; because the temperature of the return gas is lower and the temperature of the input gas is higher, the input gas and the return gas exchange heat at the micro heat exchanger 202, so that the input gas is cooled, and the precooling effect is further realized, otherwise, if the input gas is the heat medium gas, the gas is preheated at the micro heat exchanger 202; the micro heat exchanger 202 may be a copper finned tube. The other end of the handle housing 304 in this embodiment is connected to a resistive break stylus shaft 306 where the gas is throttled, thereby producing a low temperature or re-warming effect. The protection soft sleeve 305 is sleeved outside the resistance breaking freezing pen holder 306, the protection soft sleeve 305 can rotate and move back and forth along the resistance breaking freezing pen holder 306, and the protection soft sleeve 305 is soft and bendable and has a good heat insulation effect.
Referring to fig. 6, the resistive break stylus pen holder 306 provided in the present embodiment includes a spring tube 401, an orifice 402, a resistive break stylus outer wall 403, an air supply tube 404, an electric heating wire 405, and a vacuum heat insulation tube 407. Wherein, the outer wall 403 of the resistance breaking freezing pen is made of aluminum or stainless steel which is subjected to solution heat treatment or annealing heat treatment, has better softness and can be bent; the spring tube 401 is arranged in the front end of the outer wall 403 of the electric blocking freezing pen, and the spring tube 401 can play a role in supporting the tube wall when the outer wall 403 of the electric blocking freezing pen is bent, so that the tube wall is prevented from collapsing; the spring tube 401 can be a high-density spring or a copper tube, two ends of the spring tube 401 are connected with the wire connector 301 through an electric heating wire 405, the heating device 204 is heated in an electric heating mode, and the temperature of the outer wall of the resistance breaking freezing pen is finally increased in a metal conduction mode, so that the purposes of re-warming and defrosting are achieved; the vacuum heat insulation pipe 407 is arranged in the rear end of the outer wall 403 of the electric blocking freezing pen and is used for ensuring that other pen rod parts are not frozen except for a bendable working area at the front end of the pen rod of the electric blocking freezing pen, so that other extra tissues are prevented from being frostbitten; the vacuum heat insulation pipe 407 is a double-layer stainless steel pipe and is manufactured by welding through a vacuum brazing technology; the air supply pipe 404 is used for sending the refrigerant or the heating medium gas into the resistance breaking refrigeration pen, and the refrigerant or the heating medium gas passes through the orifice 402 on the air supply pipe 404 to generate the Joule Thomson effect so as to generate the temperature reduction or the temperature increase; the temperature measuring sensor 203 and the heating device 204 are both arranged in the electric blocking freezing pen holder 306, and the temperature measuring sensor 203 and the heating device 204 are both electrically connected to the wire connector 301. The temperature sensor 203 is used for monitoring the temperature of the resistance breaking freezing pen in real time, and can be a temperature thermocouple or a temperature thermal resistor.
The resistive break freezing pen holder of the embodiment has good bending property, as shown in fig. 7. Because the typical application of this example is the resistance isolation channel in the heart maze operation, its freezing route is not straight, need buckle into various forms according to the requirement, so the freezing work area of this embodiment resistance break freezing pen-holder front end needs to have good bendability, and inside has high-density spring or copper pipe as the support of the outer wall of the electric break freezing pen, if there is no bearing structure, the phenomenon that the outer wall collapses very easily when the resistance break freezing pen-holder buckles.
The resistance breaking freezing pen holder of the embodiment has good bending property, and can be bent at any angle according to the shape of the part to be treated during operation. For example, a semicircular resistance breaking passage is needed to be carried out on the heart, the pen holder of the resistance breaking freezing pen can be bent into a semicircle, and the radius of the semicircle is consistent with that of the semicircular resistance breaking passage to be treated. When the freezing electric blocking system is used for atrial fibrillation treatment, firstly, the electric blocking passage is needed to be used for carrying out adaptive bending on the resistance breaking freezing pen according to the requirement, so that the freezing working area of the resistance breaking freezing pen can be fully attached to atrial tissues, as shown in fig. 8. The angle and radius of the bend are not fixed due to differences in human heart size, which requires that the electro-blocking stylus be sufficiently flexible and flexible. In addition, there are 7 to 8 passages that are required for general surgery, as shown in fig. 9. The electric blocking freezing pen is required to be repeatedly bent for many times, and the outer wall of the electric blocking freezing pen is made of aluminum or stainless steel subjected to solution heat treatment or annealing heat treatment, so that the electric blocking freezing pen has good softness; meanwhile, a high-density spring or a copper pipe is arranged in the bending area and used as a support for the outer wall of the electric blocking freezing pen, and the bending times and the softness of the electric blocking freezing pen have good effects. After the electric blocking freezing pen is attached to the atrial wall, freezing is started until the atrial wall is frozen completely, defrosting (namely re-warming) is carried out, so that the electric blocking freezing pen is removed from the atrial wall (freezing has viscosity), then the electric blocking freezing pen is bent according to the form of the next passage, the next passage is attached, and the defrosting operation is repeated again until all the passages are electrically blocked.
In practical application, the main controller receives the operation information transmitted by the man-machine interaction component, completes the corresponding operation instruction, and transmits the current state information to the man-machine interaction component for display; in addition, the main controller controls the gas circuit control part according to the corresponding operation instruction to finish gas on-off and power adjustment; meanwhile, temperature information acquired by the temperature acquisition component is received, so that the temperature of the resistance breaking freezing pen is monitored in real time; in the defrosting process, two defrosting modes are selectable, wherein one defrosting mode is that the main controller controls the heating module to work, so that the heating device of the resistance breaking freezing pen works, and the defrosting effect is achieved; the other defrosting mode is that the main controller controls the air passage control part, and the air passage control part is filled with heating medium gas (such as helium), heated laughing gas or hot alcohol steam and the like, and the air passes through the air passage part of the electric blocking freezing pen and the miniature heat exchanger, so that the air passage part reaches the working area of the electric blocking freezing pen, and the defrosting effect is achieved.
The refrigeration electric blocking system provided by the embodiment has a refrigeration working mode and a refrigeration power adjusting function. The main controller receives a refrigeration control instruction issued by the man-machine interaction component 101 through an internal serial communication interface module 1031, then transmits the refrigeration control instruction to a CPU1023 in the main controller through an optical coupler 1026, the CPU1023 transmits the corresponding control instruction to a level conversion transceiver 1028 through an I/O interface module 1024, the level conversion transceiver 1028 controls a solid state relay group 1033 to work, the solid state relay group 1033 controls a refrigerant main electromagnetic valve 1046 and any refrigerant branch electromagnetic valve (the refrigerant branch electromagnetic valve 1049 or the refrigerant branch electromagnetic valve 1051) in the air circuit control component 104 to be opened, and simultaneously closes a heat medium main electromagnetic valve 1055, a heat medium branch electromagnetic valve 1057 and the heat medium branch electromagnetic valve 1059, so that refrigerant gas enters an electric blocking refrigeration pen inner air circuit part through a gas output interface 1050 or a gas output interface 1052, and reaches a resistance breaking refrigeration pen working area after being cooled by a micro heat exchanger; meanwhile, the current working state, working time and other information can be transmitted back to the interface of the man-machine interaction component 101 through the optical coupler 1026, so that a user can observe the current working state, working time and other information. In the freezing process, if the freezing power needs to be increased or decreased, an increasing or decreasing control instruction issued by the man-machine interaction component 101 is received through the serial communication interface module 1031 and then transmitted to the main controller CPU1023 through the optical coupler 1026, the CPU1023 transmits a corresponding control instruction to the level conversion transceiver 1028 through the I/O interface module 1024, the level conversion transceiver 1028 controls the solid state relay group 1033 to work, and the solid state relay group 1033 controls the on-off time ratio of the refrigerant total electromagnetic valve 1046 and any refrigerant branch electromagnetic valve (the refrigerant branch electromagnetic valve 1049 or the refrigerant branch electromagnetic valve 1051) in the gas circuit control component 104, so that the increase or decrease of the freezing power is realized. For example, if the refrigerating power is set to 50%, the refrigerant main solenoid valve 1046 and the refrigerant branch solenoid valve 1049 are opened for 5 seconds to be ventilated in a period of 10 seconds, then the refrigerant main solenoid valve 1046 and the refrigerant branch solenoid valve 1049 are closed for 5 seconds to be not ventilated, and the operation is repeated every period, so that the gas amount of the refrigerant gas entering the electric blocking refrigerating pen is controlled, and the effect of adjusting the power is generated.
The refrigeration electric blocking system provided by the embodiment has a dual-mode defrosting function. The first defrost mode is: the serial communication interface module 1031 in the main controller receives the defrosting control command issued by the man-machine interaction component 101, and then transmits the defrosting control command to the main controller CPU1023 through the optical coupler 1026, the CPU1023 transmits the corresponding control command to the level conversion transceiver 1028 through the I/O interface module 1024, the level conversion transceiver 1028 controls the solid state relay group 1033 of the main controller to work, the solid state relay group 1033 controls the heating medium total electromagnetic valve 1055 and any heating medium branch electromagnetic valve (heating medium branch electromagnetic valve 1057 or heating medium branch electromagnetic valve 1059) in the gas circuit control component 104 to be opened, and simultaneously closes the cooling medium total electromagnetic valve 1046, the cooling medium branch electromagnetic valve 1049 and the cooling medium branch electromagnetic valve 1051, so that the heating medium gas enters the gas circuit part in the electric blocking freezing pen through the gas output interface 1050 or the gas output interface 1052, and reaches the working area of the resistance breaking freezing pen after being heated by the micro heat exchanger, so that the resistance breaking freezing pen is heated, and the defrosting effect is achieved. The second defrost mode is: the serial communication interface module 1031 in the main controller receives the defrosting control command issued by the man-machine interaction component 101, and then transmits the defrosting control command to the main controller CPU1023 through the optical coupler 1026, the CPU1023 controls the transistor 1029 to work through the I/O interface module 1024, the transistor 1029 can be a MOSFET or IGBT transistor, the transistor 1029 rectifies the heating module 106, and then the heating device 204 of the electric blocking freezing pen is controlled to work, and the electric blocking freezing pen working area is reached through metal conduction, so that the resistance breaking freezing pen is heated, and the defrosting effect is achieved. The two defrosting modes can be selected according to any practical situation.
The refrigeration electric blocking system provided by the embodiment has the functions of temperature setting and accurate temperature control. After the freezing is started, the temperature acquisition component 107 acquires the temperature of the temperature measurement sensor 203 in the freezing pen in real time, and the temperature is transmitted to the A/D converter 1072 through the filter circuit 1073 and the electronic switch 1074 in the temperature acquisition component 107, wherein the A/D converter 1072 is a conversion chip with the precision of more than 16 bits; meanwhile, the A/D converter 1072 collects the ambient temperature through the cold end temperature sensor 1075, the ambient temperature can generate errors for collection in the normal temperature collection process, and when the temperature is collected, the ambient temperature is synchronously collected, and the temperature errors can be compensated to reduce the collection errors, so that the collected temperature is more accurate; then the temperature acquisition component 107 transmits the acquired temperature information to the main controller through the level interface module 1071, and the main controller controls the on-off time of the refrigerant main solenoid valve 1046 and any refrigerant branch solenoid valve (refrigerant branch solenoid valve 1049 or refrigerant branch solenoid valve 1051) in the gas circuit control component 104 through the solid relay group 1033, so as to further control the output quantity of the refrigerant gas and achieve the purpose of controlling the freezing temperature.
In practical application, the main working process of the refrigeration electric blocking system provided in this embodiment includes:
1. refrigeration mode of operation
In the freezing process, the refrigerant gas is first connected to the refrigerant gas port of the host, the resistive break freezing pen is connected to the channel to be used (gas output port 1050 or gas output port 1052 shown in fig. 3), and the gas cylinder is opened. Then, an operator firstly operates through the man-machine interaction component, presses the freezing key of the corresponding channel, and the man-machine interaction component transmits collected operation information of the operator to the main controller in a serial communication mode. The operation information communicated with the inside of the main controller is transmitted to the CPU of the main controller through the optical coupler, and the CPU processes the operation information and records the operation information in the memory. According to the processing result, the level conversion transceiver is controlled to control the solid state relay group according to the I/O interface module in the main controller, so as to control the opening of the corresponding refrigerant main solenoid valve (as shown in fig. 3), and according to the channel number of the operation freezing, the corresponding refrigerant branch solenoid valve is opened, for example, the channel of the operation gas output interface 1050 is frozen, and then the corresponding refrigerant branch solenoid valve 1049 is opened. Finally, as shown in fig. 3, the refrigerant gas finally flows from the gas cylinder to the gas output port through the host refrigerant gas port, the particle filter, the pressure sensor, the refrigerant main electromagnetic valve, the water vapor filter and the refrigerant branch electromagnetic valve, and then enters the resistance breaking refrigeration pen.
The refrigerant gas enters the resistance breaking refrigeration pen through the gas connector 302 shown in fig. 5, and the gas transmission pipeline of the resistance breaking refrigeration pen sends the refrigerant gas to the miniature heat exchanger in the handle shell, so that the refrigerant gas enters the pen holder part of the resistance breaking refrigeration pen; an air supply pipe is arranged in the pen holder of the resistance breaking refrigeration pen, the air supply pipe is provided with a plurality of orifices, when refrigerant gas passes through the orifices, the temperature can be reduced according to the Joule-Thomson effect, and the working area at the front end of the pen holder has a refrigeration function at low temperature; the throttled gas flows back through the clearance between the gas pipe and the outer wall of the resistance breaking refrigeration pen, flows back to the miniature heat exchanger in the handle shell and is intersected with the newly-entered refrigerant gas, and the temperature of the reflowed gas is lower than that of the newly-entered refrigerant gas, so that the newly-entered refrigerant gas is cooled, the cooled gas enters the throttle hole at the front end of the resistance breaking refrigeration pen holder again, the temperature is further reduced, and the process is repeated circularly, so that dynamic balance is finally achieved.
2. Defrosting operation mode
The refrigeration circuit blocking system of this embodiment has two alternative defrost modes of operation: the first is similar to the above-described refrigeration mode of operation, except that the gas introduced by the system control is the heating medium gas used by the system.
The second defrosting operation mode of the refrigeration electric blocking system of the embodiment is as follows: the doctor selects the defrosting mode by operating the man-machine interaction interface shown in fig. 1, and the man-machine interaction component transmits the operation information of the operator to the main controller in a serial communication mode. The communication operation information is transmitted to the CPU of the main controller through the optical coupler in the main controller, and the CPU processes the operation information and records the operation information in the memory. According to the processing result, the transistor is controlled to work through an I/O interface module in the main controller, and then the heating module is controlled to output electric energy. The resistance breaking freezing pen is provided with a wire connector connected with the electric energy output interface of the host, and electric energy heats the heating device inside the resistance breaking freezing pen through the wire connector, so that the aim of defrosting is achieved.
3. Freezing temperature setting function
The freezing electricity blocking system of the embodiment has a freezing temperature setting function, and the working mode is as follows: firstly, a doctor sets the freezing temperature of the channel through a man-machine interaction component, and the man-machine interaction component can transmit operation information of the operator to a main controller in a serial communication mode on the assumption that the set temperature is T. The communication operation information is transmitted to the CPU of the main controller through the optical coupler of the main controller, and the CPU processes the operation information and records the operation information in the memory. After the freezing starts, the temperature sensor collects the temperature of the resistance breaking freezing pen, and is denoted by T', the temperature signal is connected with a temperature collecting component in the main controller, the temperature signal is transmitted to the A/D converter through the filter circuit and the electronic switch, the A/D converter converts the analog signal of the temperature into a digital signal, and then the temperature information is transmitted to the main controller through an SPI or TTL interface communication mode. The main controller is connected with the temperature acquisition component through the optical coupler, after the temperature information is transmitted to the CPU, the CPU compares the real-time temperature signal T 'with the previously set T, if the temperature of the T' reaches the T, the channel refrigerant branch electromagnetic valve is automatically closed, after the refrigerant is closed, the temperature is increased, and when the temperature is increased to be more than the T, the channel refrigerant branch electromagnetic valve is opened again. The real-time temperature T' of the resistance breaking freezing pen is always kept near the set temperature T by the circulation.
According to the freezing electric blocking system provided by the embodiment of the invention, the temperature of the working area of the resistance breaking freezing pen can be monitored in real time through the temperature acquisition component and the temperature sensor, so that the accurate temperature control is realized, the freezing temperature is set according to the requirement, the freezing power is adjusted, the freezing temperature is lower and the efficiency is high, and compared with the lowest freezing temperature in the prior art which can only reach-80 ℃, the lowest freezing temperature in the embodiment of the invention can reach-150 ℃, and the operation time is greatly saved. The freezing resistor breaking system provided by the embodiment of the invention has two selectable defrosting modes, is simple and feasible to operate, has high defrosting efficiency and good effect, and greatly saves operation time. The freezing electric blocking system provided by the embodiment of the invention has two freezing channels, so that the freezing efficiency of multi-part freezing is improved, and the operation time is shortened. The resistance breaking freezing pen holder in the freezing electric blocking system provided by the embodiment of the invention has better bending property, high hardness and good operation adaptability, and can ensure that the working area of the resistance breaking freezing pen is completely attached to a freezing part, so that the resistance breaking freezing is thorough.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.