Accurate control liquid nitrogen cold therapy system

Abstract

The invention relates to the technical field of cold therapy equipment, aims to solve the problems that an existing cold therapy instrument is limited by the qualification of a pressure container when liquid nitrogen atomization is conducted through a high-pressure atomization system, and cooling of the cold therapy instrument is not uniform, and provides a precisely-controlled liquid nitrogen cold therapy system which comprises a composite tank, an atomization system and a cold therapy cabin. The composite tank is connected with the cold therapy cabin body through the atomization system; the composite tank comprises a vacuum heat preservation outer tank body and a pressure inner tank body, the pressure inner tank body is located in the vacuum heat preservation outer tank body, a liquid supplementing pipe is connected to the bottom of the pressure inner tank body, liquid nitrogen in the vacuum heat preservation outer tank body is supplemented into the pressure inner tank body through the liquid supplementing pipe, and the pressure inner tank body is connected to the atomization system through a liquid inlet pipe; a flow guide plate assembly is arranged on the cold therapy cabin body, the atomization system is connected with the flow guide plate assembly, the flow guide plate assembly comprises a flow guide plate, and a plurality of automatic adjusting air valves are installed on the flow guide plate; the device is not limited by the qualification of the pressure container and is uniform in cooling.

Description

Technical Field

[0001] The present invention relates to the technical field of cryotherapy equipment, and in particular to a precise control liquid nitrogen cryotherapy system. Background Art

[0002] Ultra-low temperature cryotherapy is a non-contact self-healing therapy that exposes the body to a -110℃ to -180℃ cryotherapy chamber. Ultra-low temperature cryotherapy uses ultra-low temperature gas to quickly and briefly stimulate the human body to promote physical recovery and regulate physiological functions.

[0003] According to different working principles, ultra-low temperature cryotherapy is divided into liquid nitrogen refrigeration ultra-low temperature cryotherapy and compressor refrigeration ultra-low temperature cryotherapy. Among them, liquid nitrogen refrigeration ultra-low temperature cryotherapy has the characteristics of high treatment efficiency, wide temperature range, and small equipment size, and is more widely used.

[0004] Ultra-low temperature cryotherapy is a new type of cold therapy method. In the early days, it was mainly used to treat rheumatic diseases such as rheumatoid arthritis and ankylosing spondylitis. Later, with the improvement and development of technology, the application of ultra-low temperature cryotherapy has gradually expanded from medical treatment to sports rehabilitation, beauty and body care, health care and physiotherapy. In the field of sports rehabilitation, ultra-low temperature cryotherapy can be used for training fatigue recovery, chronic injury repair, etc.

[0005] Some whole body cryotherapy devices currently on the market have the following problems:

[0006] 1. The cryotherapy chamber uses a high-pressure system to achieve liquid nitrogen atomization. It mostly uses a high-pressure liquid nitrogen tank and nozzle. The tank volume is 100L and the pressure inside the tank exceeds one atmosphere (0.1Mpa). It is a pressure vessel and needs to be operated by personnel holding relevant qualifications.

[0007] 2. When a low-pressure system is used to achieve liquid nitrogen atomization, liquid nitrogen atomization is mostly achieved by evaporation of liquid nitrogen. The liquid nitrogen atomization is not sufficient, and there are even droplets. The consumption of liquid nitrogen is relatively large, averaging 10L / 3min.

[0008] 3. The temperature measurement method mostly uses a single sensor to measure the temperature at the outlet of the low-temperature nitrogen. The cooling data of the user's body is unknown and the cooling is uneven.

[0009] 4. The equipment is simple, and most of them are not equipped with safety devices, posing safety hazards. Summary of the invention

[0010] The present invention aims to provide a precise control liquid nitrogen cryotherapy system to solve the problems of the existing cryotherapy device being limited by the qualification of the pressure vessel when using a high-pressure atomization system for liquid nitrogen atomization and the uneven cooling of the cryotherapy device.

[0011] The present invention is achieved by adopting the following technical solutions:

[0012] The present invention provides a precise control liquid nitrogen cryotherapy system, comprising a composite tank, an atomization system and a cryotherapy cabin, wherein the composite tank is connected to the cryotherapy cabin through the atomization system;

[0013] The composite tank comprises a vacuum insulation outer tank body and a pressure inner tank body, wherein the pressure inner tank body is located inside the vacuum insulation outer tank body, a liquid replenishing pipe is connected to the bottom of the pressure inner tank body, and liquid nitrogen in the vacuum insulation outer tank body is replenished into the pressure inner tank body through the liquid replenishing pipe, and the pressure inner tank body is connected to the atomization system through a liquid inlet pipe;

[0014] The cold therapy cabin is provided with a guide plate assembly, the atomization system is connected to the guide plate assembly, the guide plate assembly comprises a guide plate, and a plurality of automatic regulating air valves are installed on the guide plate.

[0015] As the preferred technical solution:

[0016] The vacuum insulation outer tank body is filled with liquid nitrogen, and the pressure inner tank body is located inside the vacuum insulation outer tank body and above the liquid level of the liquid nitrogen.

[0017] As the preferred technical solution:

[0018] The vacuum insulation outer tank body adopts a double-layer structure, which includes an outer shell and an inner liner. The inner liner is located inside the outer shell, a vacuum insulation layer is formed between the outer shell and the inner liner, and the pressure inner tank body is located inside the inner liner.

[0019] As the preferred technical solution:

[0020] The vacuum insulation outer tank body is connected with an outer tank body liquid replenishing port.

[0021] As the preferred technical solution:

[0022] A heating rod is arranged inside the pressure inner tank;

[0023] The pressure inner tank is connected to a pressure sensor, the pressure sensor is used to measure the pressure inside the pressure inner tank, and the pressure sensor is connected to a control system;

[0024] The heating rod is also connected to the control system, and the control system can control whether the heating rod is powered on;

[0025] The liquid inlet pipe is provided with a liquid inlet solenoid valve, and the liquid inlet solenoid valve is also connected to the control system, and the control system can control whether the liquid inlet solenoid valve is opened.

[0026] When the cryotherapy system is working, the control system sends out instructions to control the heating rod to be powered on for heating, so that a small amount of liquid nitrogen in the pressure inner tank body evaporates quickly, thereby increasing the pressure in the pressure inner tank body. When the pressure sensor detects that the pressure in the pressure inner tank body reaches the liquid inlet set pressure, the control system controls the liquid inlet solenoid valve to open, and the liquid nitrogen in the pressure inner tank body flows rapidly to the atomization system under the action of pressure.

[0027] As the preferred technical solution:

[0028] The pressure inner tank is also connected to a vent pipe, on which a vent solenoid valve is arranged. The vent solenoid valve is also connected to the control system, and the control system can control whether the vent solenoid valve is opened.

[0029] When the pressure sensor detects that the pressure in the pressure tank exceeds the set pressure threshold, the control system controls the heating rod to cut off the power and stop heating, and at the same time controls the vent solenoid valve to open to discharge excess gas until the pressure drops below the pressure threshold, and then the vent solenoid valve is closed.

[0030] As the preferred technical solution:

[0031] The pressure inner tank is also connected with a safety valve.

[0032] As the preferred technical solution:

[0033] The liquid infusion tube is provided with a liquid infusion one-way valve;

[0034] A liquid level gauge is arranged in the pressure inner tank body, and the liquid level gauge is connected to the control system.

[0035] When the liquid level of the liquid nitrogen in the pressure inner tank is lower than the lowest set liquid level, the control system controls the closing of the liquid inlet solenoid valve and the opening of the venting solenoid valve. Under the pressure in the vacuum insulation outer tank, the liquid nitrogen in the vacuum insulation outer tank enters the pressure inner tank through the liquid replenishment one-way valve and the liquid replenishment pipe to replenish the pressure inner tank. When the liquid level in the pressure inner tank reaches the set liquid level, the control system controls the venting solenoid valve to close. When the pressure in the pressure inner tank rises to the same as the pressure in the vacuum insulation outer tank, the liquid replenishment is stopped.

[0036] As the preferred technical solution:

[0037] The automatic regulating air valve comprises an air valve base, a air valve solenoid is installed on the top of the air valve base, an air valve baffle is arranged inside the air valve base, connecting rods are arranged at the left and right ends of the air valve baffle, and the left and right ends of the air valve baffle are rotatably connected to the side plates on both sides of the air valve base respectively;

[0038] The air valve baffle is connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the shutter connecting plate, and the shutter connecting plate is connected to a magnetic attraction plate, and the magnetic attraction plate cooperates with the air valve electromagnet;

[0039] The air valve solenoid is connected to a control system.

[0040] When the air valve electromagnet is energized, the air valve electromagnet attracts the magnetic attraction plate to move upward, thereby causing the shutter connection plate to move upward, and the connecting rod rotates accordingly, thereby causing the air valve baffle to rotate. The air valve electromagnet is connected to the control system, so that the automatic regulating air valve can be controlled by the control system.

[0041] As the preferred technical solution:

[0042] A mounting hole is provided on the top of the air valve base, the air valve electromagnet is installed in the mounting hole, and the electromagnet mounting bracket is fixedly mounted on the top of the air valve base.

[0043] As the preferred technical solution:

[0044] A plurality of the air valve baffles are arranged inside the air valve base, and a connecting pin is respectively arranged at the left and right ends of each of the air valve baffles, and each of the connecting pins is connected to a connecting rod, and the connecting pin passes through one end of the connecting rod and is inserted into a corresponding hole on the side plate of the air valve base;

[0045] A louver connection plate is arranged on both sides of the interior of the air valve base, and the other ends of all the connecting rods located on the same side of the air valve base are rotatably connected to the corresponding louver connection plate.

[0046] As the preferred technical solution:

[0047] The bottom of the shutter connection plate is connected with a stretching device, the upper end of the stretching device is fixed on the shutter connection plate, the lower end of the stretching device is fixed on a spring hook bracket, and the spring hook bracket is fixedly connected to the bottom plate of the air valve base;

[0048] When the air valve baffle is in an open state, the stretching device is in a stretched state.

[0049] As the preferred technical solution:

[0050] The stretching device may be a stretching spring, but is not limited to a stretching spring, and other devices with elastic expansion and contraction capabilities may also be used.

[0051] The louver connecting plate is at the lowest position under the tension of the stretch spring; when the air valve solenoid is energized, the air valve solenoid attracts the magnetic plate to move up, so that the louver connecting plate overcomes the tension of the stretch spring and moves up, and the connecting rod rotates to drive the air valve baffle to rotate. When the louver connecting plate moves to the highest position, the air valve baffle is in a closed state, and low-temperature nitrogen cannot enter the cold therapy cabin.

[0052] As the preferred technical solution:

[0053] A rotating shaft is arranged on the outer side of the shutter connecting plate, and the other end of the connecting rod is connected to the corresponding rotating shaft;

[0054] A limiting rod is arranged on the outer side of the shutter connection plate, an arc-shaped limiting groove is opened on the side plate of the air valve base, and the limiting rod is located in the arc-shaped limiting groove.

[0055] The arc-shaped limiting groove is used to limit the movement range of the louver connecting plate.

[0056] As the preferred technical solution:

[0057] The atomization system comprises an atomization nozzle and an atomization box, the liquid inlet pipe is connected to the liquid inlet end of the atomization nozzle, and the nozzle end of the atomization nozzle is located in the atomization box;

[0058] The nebulizer box comprises a nebulizer box shell and a nebulizer box fixed back plate, wherein the nebulizer box fixed back plate is connected to one side of the nebulizer box shell, the nebulizer box fixed back plate is connected to the cold therapy cabin, and an nebulizer box inner insulation layer is arranged in the nebulizer box shell;

[0059] A liquid inlet fan and a heating belt are installed on the atomizer box shell. The heating belt is located inside the atomizer box. The fan blades of the liquid inlet fan are also located inside the atomizer box and behind the heating belt. The outlet of the liquid inlet fan is located outside the atomizer box, and the outlet of the liquid inlet fan is connected to the guide plate.

[0060] As the preferred technical solution:

[0061] A return air system is also connected between the cold therapy cabin and the nebulizer box, and the return air system includes a return air duct shell, a return air duct insulation layer is arranged inside the return air duct shell, a connecting port at one end of the insulation layer inside the return air duct is inserted into the opening of the insulation layer inside the nebulizer box, the return air duct shell is connected to the nebulizer box shell by screws, and a connecting port at the other end of the insulation layer inside the return air duct is connected to the cold therapy cabin, and the return air system is used to realize the return of low-temperature nitrogen in the cold therapy cabin.

[0062] As the preferred technical solution:

[0063] An infrared temperature measuring component is arranged on the side of the interior of the cold therapy cabin, and the infrared temperature measuring component includes an infrared temperature measuring camera and an isolation glass. The infrared temperature measuring camera is located outside the isolation glass, and the infrared temperature measuring camera is connected to a display screen, and the display screen is connected to the control system. The control system adjusts the automatic regulating air valve according to different temperature distributions.

[0064] As the preferred technical solution:

[0065] A safety grating is provided inside the cryotherapy cabin, the safety grating is installed on the top of the cryotherapy cabin, and the safety grating is connected to the control system;

[0066] The cryotherapy cabin is installed on a cabin frame, a door assembly is provided on one side of the cryotherapy cabin, the door assembly includes a door and a door frame, the door is installed on the door frame, the door cooperates with the cryotherapy cabin, the cryotherapy cabin is sealed when the door is closed, and the door frame is in contact with the cabin frame;

[0067] A hydraulic-pneumatic device is provided between the cabin frame and the cabin door assembly, and when the cabin door is closed, the hydraulic-pneumatic device is in a compressed state;

[0068] A hatch door opening and closing electromagnet assembly is provided on the cabin body frame, and the hatch door opening and closing electromagnet assembly is arranged on a side of the cabin body frame opposite to the hatch door assembly. The hatch door opening and closing electromagnet assembly includes multiple hatch door opening and closing electromagnets, and the hatch door opening and closing electromagnets cooperate with the mechanical mechanism on the hatch door to open or close the hatch door. The hatch door opening and closing electromagnets are connected to the control system, and the control system can control the hatch door opening and closing electromagnets to close according to the signal transmitted by the safety grating.

[0069] When the user suffocates or encounters other special circumstances and slides to the bottom of the cryotherapy cabin, the safety grating cannot identify the human body and transmits a signal to the control system, which controls the cabin door opening and closing electromagnet to close. When the cabin door opening and closing electromagnet is powered off and closed, the cabin door will open under the action of the hydraulic pneumatic device, and the low-temperature nitrogen in the cryotherapy cabin will be quickly discharged into the air to prevent further harm to the user.

[0070] As the preferred technical solution:

[0071] The hydraulic pneumatic device may adopt a hydraulic pneumatic spring, but is not limited to a hydraulic pneumatic spring, and other devices with telescopic capabilities may also be used.

[0072] As the preferred technical solution:

[0073] A telescopic guide rail is also installed at the bottom of the cabin frame, the fixed end of the telescopic guide rail is fixed to the bottom of the cabin frame, and the movable end of the telescopic guide rail is fixed to the cabin door frame. A guide groove is provided at the bottom of the cabin frame, and the telescopic guide rail is located in the guide groove for guiding the opening and closing of the cabin door.

[0074] As the preferred technical solution:

[0075] A rotating pedal is arranged inside the cold therapy cabin.

[0076] As the preferred technical solution:

[0077] A lifting assembly is arranged at the bottom of the rotating pedal, and the two are connected.

[0078] As the preferred technical solution:

[0079] The control system may be a controller, such as a PLC or a single chip microcomputer.

[0080] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0081] 1. The present invention adopts a composite tank, and adopts the method of sleeve-fitting the vacuum insulation outer tank body with the pressure inner tank body, which effectively reduces the consumption of liquid nitrogen in the pressure inner tank body. At the same time, since the volume of the pressure inner tank body is small and does not reach the range of the pressure vessel, the qualification restriction of the pressure vessel is avoided, and the problem of the qualification restriction of the pressure vessel when the high-pressure atomization system is used for liquid nitrogen atomization in the prior art cold therapy device is solved;

[0082] 2. The atomization system of the present invention has a simple structure and sufficient atomization. The liquid nitrogen consumption of the atomization system is small. According to actual measurement, the liquid nitrogen consumption of the atomization system of the present invention is 5L / 3min, which solves the problem of complex atomization system of the cryotherapy cabin in the prior art and large liquid nitrogen consumption;

[0083] 3. The present invention uses a plurality of automatic regulating air valves to accurately control the amount and height of low-temperature nitrogen, and accurately control the nitrogen concentration and temperature in the cryotherapy cabin, so that the temperature in the cryotherapy cabin is uniform. At the same time, the rotating pedal is used to enable the user to evenly cool down in the cryotherapy cabin, thereby improving the therapeutic effect and solving the problem of uneven cooling in the cryotherapy device in the prior art.

[0084] 4. The present invention is provided with an infrared temperature measuring camera, and displays the human body cooling situation collected by it on the display screen in real time, obtains human body cooling data in real time, and monitors the data so as to grasp the human body cooling situation in real time, avoid harm to the user caused by too low temperature, and stop the cold therapy in time when the temperature drops too low; at the same time, the present invention is provided with a safety grating in the cold therapy cabin to monitor the user's status. When the user suffocates or other special circumstances occur and slides to the bottom of the cold therapy cabin, the safety grating can send a signal to the control system in time, and the control system controls the cabin door opening and closing electromagnet to close, and cooperates with the hydraulic pneumatic spring to quickly open the cabin door, which can effectively monitor and protect the user in real time, effectively reduce the risk of low-temperature nitrogen to the human body, and solve the safety problems existing in the cold therapy cabin in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 This is a front view of the precise control liquid nitrogen cryotherapy system described in the present invention.

[0086] Figure 2 This is a top view of the precise control liquid nitrogen cryotherapy system described in the present invention.

[0087] Figure 3 This is a left view of the precise control liquid nitrogen cryotherapy system described in the present invention.

[0088] Figure 4 This is a three-dimensional structural diagram of the precise control liquid nitrogen cryotherapy system described in the present invention.

[0089] Figure 5 A cross-sectional view of the precise control liquid nitrogen cryotherapy system according to the present invention Figure 1 .

[0090] Figure 6 A cross-sectional view of the precise control liquid nitrogen cryotherapy system according to the present invention Figure 2 .

[0091] Figure 7 This is a diagram showing the working principle of the composite tank described in the present invention.

[0092] Figure 8 This is a schematic diagram of the liquid replenishment principle of the composite tank described in the present invention.

[0093] Fig. 9 It is a schematic structural diagram of the guide plate assembly described in the present invention.

[0094] Fig.10 It is a schematic diagram of the structure of the automatic regulating air valve described in the present invention.

[0095] Fig.11 This is a schematic diagram of the exploded parts of the automatic regulating air valve described in the present invention.

[0096] Fig.12 It is a schematic diagram of the opening of the automatic regulating air valve described in the present invention.

[0097] Fig.13 This is a schematic diagram of the closing of the automatic regulating air valve described in the present invention.

[0098] Fig.14 This is an exploded view of the parts of the atomization system and the return air system described in the present invention.

[0099] Fig.15 This is a planar wind direction diagram inside the cryotherapy cabin described in the present invention.

[0100] Fig.16 This is a vertical wind direction diagram inside the cold therapy cabin of the present invention.

[0101] Icons: 1-composite tank, 2-nebulizer system, 3-cold therapy cabin, 4-cabin door assembly, 5-hydraulic pneumatic spring, 6-telescopic guide rail, 7-deflector assembly, 8-safety grating, 9-rotating pedal, 10-return air system, 11-lifting assembly, 12-display screen, 13-cabin frame, 14-cabin insulation layer, 15-infrared temperature measurement assembly, 16-cabin door opening and closing electromagnet, 17-cabin door, 18-cabin door frame, 19-rotating pedal motor, 20-thrust ball bearing, 21-sprocket, 22-roller chain, 23-infrared temperature measurement camera, 24-isolation glass, 25-vacuum insulation outer tank, 26-pressure inner tank, 27-vacuum insulation layer, 28-outer tank filling port, 29-one-way filling Valve, 30-heating rod, 31-safety valve, 32-vent solenoid valve, 33-pressure sensor, 34-liquid level gauge, 35-liquid inlet solenoid valve, 36-guide plate, 37-automatic adjustment air valve, 38-electromagnet mounting bracket, 39-air valve solenoid, 40-air valve base, 41-air valve baffle, 42-connecting pin, 43-connecting rod, 44-louver connecting plate, 45-limiting rod, 46-arc-shaped limiting groove, 47-magnetic suction plate, 48-tension spring, 49-spring hook bracket, 50-atomizer box shell, 51-atomizer box fixed back plate, 52-atomizer box inner insulation layer, 53-liquid inlet fan, 54-heating belt, 55-atomizer nozzle, 56-return air duct shell, 57-return air duct insulation layer. DETAILED DESCRIPTION

[0102] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0103] Example 1

[0104] like Figure 1-Figure 6 As shown, this embodiment proposes a precise control liquid nitrogen cryotherapy system, including a compound tank 1, an atomization system 2 and a cryotherapy chamber 3, wherein the compound tank 1 is connected to the cryotherapy chamber 3 through the atomization system 2.

[0105] In this embodiment, the composite tank 1 is placed on one side of the cryotherapy cabin 3 , and the atomization system 2 is connected to one side of the cryotherapy cabin 3 .

[0106] The composite tank 1 comprises a vacuum insulation outer tank body 25 and a pressure inner tank body 26. The vacuum insulation outer tank body 25 is filled with liquid nitrogen. The pressure inner tank body 26 is located inside the vacuum insulation outer tank body 25 and above the liquid level of the liquid nitrogen.

[0107] The vacuum insulation outer tank body 25 adopts a double-layer structure, which includes an outer shell and an inner liner. The inner liner is located inside the outer shell. A vacuum insulation layer 27 is between the outer shell and the inner liner. The pressure inner tank body 26 is located inside the inner liner.

[0108] The vacuum insulation outer tank body 25 is connected to an outer tank body liquid replenishing port 28 , and liquid nitrogen is replenished to the vacuum insulation outer tank body 25 through the outer tank body liquid replenishing port 28 .

[0109] The bottom of the pressure inner tank body 26 is connected with a liquid replenishing pipe, and the liquid replenishing one-way valve 29 is provided on the liquid replenishing pipe. The vacuum insulation outer tank body 25 can replenish the liquid nitrogen for the pressure inner tank body 26 through the liquid replenishing pipe and the liquid replenishing one-way valve 29. Due to the provision of the liquid replenishing one-way valve 29, when the pressure in the pressure inner tank body 26 is greater than the pressure in the vacuum insulation outer tank body 25, the liquid nitrogen in the pressure inner tank body 26 will not flow back to the vacuum insulation outer tank body 25.

[0110] The pressure inner tank body 26 is also filled with liquid nitrogen, and a heating rod 30 is arranged inside the pressure inner tank body 26. The heating rod 30 partially extends into the liquid nitrogen in the pressure inner tank body 26. The pressure inner tank body 26 is connected to the cryotherapy cabin body 3 through a liquid inlet pipe. After the heating rod 30 is powered on and heated, a small amount of liquid nitrogen in the pressure inner tank body 26 will evaporate quickly, increasing the pressure in the pressure inner tank body 26, thereby transporting the liquid nitrogen in the pressure inner tank body 26 to the atomization system 2 through the liquid inlet pipe.

[0111] like Figure 7As shown, in order to ensure that the liquid inlet process is controllable, the pressure inner tank body 26 is connected to a pressure sensor 33, and the pressure sensor 33 is used to measure the pressure in the pressure inner tank body 26. The pressure sensor 33 is connected to a control system, so as to transmit the collected pressure data to the control system; the heating rod 30 is also connected to the control system, and the control system can control whether the heating rod 30 is powered on; a liquid inlet solenoid valve 35 is provided on the liquid inlet pipe, and the liquid inlet solenoid valve 35 is also connected to the control system, and the control system can control whether the liquid inlet solenoid valve 35 is opened. When the cold therapy system is working, the control system issues an instruction to control the heating rod 30 to be powered on for heating, so that a small amount of liquid nitrogen in the pressure tank body 26 evaporates quickly, and the pressure in the pressure tank body 26 increases. When the pressure sensor 33 detects that the pressure in the pressure tank body 26 reaches the set liquid inlet pressure, the control system controls the liquid inlet solenoid valve 35 to open, and the liquid nitrogen in the pressure tank body 26 flows rapidly to the atomization system 2 under the action of pressure; the pressure tank body 26 is also connected to a vent pipe, and a vent solenoid valve 32 is provided on the vent pipe, and the vent solenoid valve 32 is also connected to the control system. The control system can control whether the vent solenoid valve 32 is opened. When the pressure sensor 33 detects that the pressure in the pressure tank body 26 exceeds the set pressure threshold, the control system controls the heating rod 30 to be powered off and stop heating, and at the same time controls the vent solenoid valve 32 to open to discharge excess gas until the pressure drops below the pressure threshold (1MPa), and then the vent solenoid valve 32 is closed.

[0112] In this embodiment, the control system may be a controller, such as a PLC or a single-chip microcomputer.

[0113] A liquid level gauge 34 is provided in the pressure inner tank body 26, and the liquid level gauge 34 is used to measure the liquid level of the liquid nitrogen in the pressure inner tank body 26. The liquid level gauge 34 is connected to the control system, so as to convert the measured liquid level information into an electrical signal and transmit it to the control system. When the liquid level of the liquid nitrogen in the pressure inner tank body 26 is lower than the minimum set liquid level, the control system controls the closing of the liquid inlet solenoid valve 35 and the opening of the venting solenoid valve 32. Under the pressure in the vacuum insulation outer tank body 25, the liquid nitrogen in the vacuum insulation outer tank body 25 enters the pressure inner tank body 26 through the liquid replenishment one-way valve 29 and the liquid replenishment pipe to replenish the liquid for the pressure inner tank body 26, as shown in FIG. Figure 8 As shown; when the liquid level in the pressure inner tank body 26 reaches the set liquid level height, the control system controls the venting solenoid valve 32 to close, and when the pressure in the pressure inner tank body 26 rises to the same as the pressure in the vacuum insulation outer tank body 25, the liquid replenishment is stopped.

[0114] The pressure inner tank body 26 is also connected to a safety valve 31, which is a safety device of the pressure inner tank body 26 and is used to prevent the venting solenoid valve 32 and the liquid inlet solenoid valve 35 from failing, thereby preventing the pressure in the pressure inner tank body 26 from being too high.

[0115] In this embodiment, the volume of the vacuum insulation outer tank body 25 is 100L, and the volume of the pressure inner tank body 26 is 10L; when the composite tank 1 is working, the pressure of the vacuum insulation outer tank body 25 is less than 0.1Mpa, and the pressure of the pressure inner tank body 26 is 1Mpa; when replenishing fluid, the pressure of the vacuum insulation outer tank body 25 is less than 0.1Mpa, and the pressure of the pressure inner tank body 26 is 0Mpa.

[0116] Compared with the method of placing the pressure inner tank 26 externally, the consumption of liquid nitrogen in the present invention is greatly reduced. This is because when the pressure inner tank 26 is placed externally, the pressure inner tank 26 needs to add an insulation layer design, which not only increases the cost, but also occupies a larger area. The pressure inner tank 26 in the atmospheric environment will continuously exchange heat with the air, resulting in continuous consumption of liquid nitrogen. However, the present invention sets the pressure inner tank 26 inside the vacuum insulation outer tank 25, and the pressure inner tank 26 is always in the low temperature environment provided by the vacuum insulation outer tank 25. Therefore, the liquid nitrogen consumed by the heat exchange of the pressure inner tank 26 will be greatly reduced. In addition, because the capacity of the pressure inner tank itself is relatively small (10 liters), it has not yet met the requirements of a pressure vessel and does not belong to a pressure vessel, avoiding the restrictions on the qualifications of pressure vessels and reducing the requirements for operators.

[0117] The cold therapy cabin 3 is installed on the cabin frame 13 and is located inside the cabin frame 13. A cabin door assembly 4 is provided on one side of the cold therapy cabin 3. The cabin door assembly 4 includes a cabin door 17 and a cabin door frame 18. The cabin door 17 is installed on the cabin door frame 18. The cabin door 17 cooperates with the cold therapy cabin 3. When the cabin door 17 is closed, the cold therapy cabin 3 is sealed. When the cabin door 17 is closed, the cabin door frame 18 fits with the cabin frame 13.

[0118] A hydraulic-pneumatic spring 5 is installed at the bottom of the cabin frame 13, and the fixed end of the hydraulic-pneumatic spring 5 is fixed to the bottom of the cabin frame 13, and the movable end of the hydraulic-pneumatic spring 5 is fixed to the cabin door frame 18. The hydraulic-pneumatic spring 5 expands and contracts to drive the cabin door assembly 4 to move closer to or away from the cold therapy cabin 3, so that the cabin door 17 is opened or closed.

[0119] A telescopic guide rail 6 is also installed at the bottom of the cabin frame 13, the fixed end of the telescopic guide rail 6 is fixed to the bottom of the cabin frame 13, and the movable end of the telescopic guide rail 6 is fixed to the cabin door frame 18. A guide groove is provided at the bottom of the cabin frame 13, and the telescopic guide rail 6 is located in the guide groove for guiding the opening and closing of the cabin door 17.

[0120] The cabin frame 13 is provided with a cabin door opening and closing electromagnet assembly, which is arranged on the side of the cabin frame 13 opposite to the cabin door assembly 4, and the cabin door opening and closing electromagnet assembly includes a plurality of cabin door opening and closing electromagnets 16, which cooperate with the mechanical mechanism on the cabin door 17 to open or close the cabin door 17. When the cabin door 17 is closed, the hydraulic and pneumatic spring 5 is in a compressed state, and when the cabin door opening and closing electromagnet 16 is powered off, the cabin door 17 will be opened under the action of the hydraulic and pneumatic spring 5.

[0121] The liquid inlet pipe is connected to the atomization system 2 to transport the liquid nitrogen in the pressure inner tank 26 to the atomization system 2 for atomization, and the low-temperature nitrogen gas obtained after atomization is then introduced into the cryotherapy cabin 3.

[0122] like Fig.14 As shown, the atomization system 2 includes an atomization nozzle 55 and an atomization box, the liquid inlet pipe is connected to the liquid inlet end of the atomization nozzle 55, and the nozzle end of the atomization nozzle 55 is located in the atomization box.

[0123] The atomizer box includes an atomizer box shell 50 and an atomizer box fixed back plate 51, wherein the atomizer box fixed back plate 51 is connected to one side of the atomizer box shell 50, and the atomizer box fixed back plate 51 is connected to the cold therapy cabin 3, and an atomizer box inner insulation layer 52 is arranged in the atomizer box shell 50. The atomizer nozzle 55 is inserted into the atomizer box inner insulation layer 52 from the bottom of the atomizer box and then fixed to the atomizer box shell 50.

[0124] A liquid inlet fan 53 and a heating belt 54 are installed on the fixed back plate 51 of the atomizer box. The heating belt 54 is located inside the atomizer box. The fan blades of the liquid inlet fan 53 are also located inside the atomizer box and behind the heating belt 54. The outlet of the liquid inlet fan 53 is located outside the atomizer box, and the outlet of the liquid inlet fan 53 is connected to the guide plate assembly 7.

[0125] When the cryotherapy program is started, the liquid inlet solenoid valve 35 is opened, and the high-pressure liquid nitrogen is atomized into low-temperature nitrogen gas through the atomizing nozzle 55 and enters the atomizing box. Under the action of the liquid inlet fan 53, the low-temperature nitrogen gas enters the cryotherapy cabin 3.

[0126] A return air system 10 is also connected between the cryotherapy cabin 3 and the nebulizer box, and the return air system 10 includes a return air duct shell 56, and a return air duct insulation layer 57 is arranged inside the return air duct shell 56. The connection port at one end of the insulation layer in the return air duct is inserted into the opening of the insulation layer 52 in the nebulizer box. The return air duct shell 56 is connected to the nebulizer box shell 50 by screws, but is not limited to being connected by screws. Other fixed connection methods are also acceptable. The connection port at the other end of the insulation layer in the return air duct is connected to the cryotherapy cabin 3. The return air system 10 is used to realize the return of the low-temperature nitrogen in the cryotherapy cabin 3 to avoid the liquid inlet fan 53 continuously transporting low-temperature nitrogen to the cryotherapy cabin 3 without anywhere to discharge it, resulting in excessive pressure in the cryotherapy cabin 3. The above structure is adopted to realize gas circulation. In this embodiment, the air inlet of the guide plate assembly 7 is located at the upper part of the side of the cryotherapy cabin 3, the outlet of the liquid inlet fan 53 is connected to the guide plate assembly 7, and the other end of the insulation layer in the return air duct is connected to the lower part of the side of the cryotherapy cabin 3, so as to facilitate the circulation of low-temperature nitrogen inside the cryotherapy cabin 3 and ensure the uniform temperature inside the cryotherapy cabin 3.

[0127] The guide plate assembly 7 is disposed on the cryotherapy cabin 3 , and the guide plate assembly 7 is used to control the low-temperature nitrogen gas from entering the cryotherapy cabin 3 .

[0128] like Figure 9-13 As shown, the guide plate assembly 7 includes a guide plate 36, the outlet of the liquid inlet fan 53 is connected to the guide plate 36, and a plurality of automatic regulating air valves 37 are installed on the guide plate 36, and the plurality of automatic regulating air valves 37 are located at different heights. In this embodiment, ten automatic regulating air valves 37 are installed on the guide plate 36.

[0129] The automatic regulating air valve 37 includes an air valve base 40, a mounting hole is provided on the top of the air valve base 40, an air valve electromagnet 39 is installed in the mounting hole, an electromagnet mounting bracket 38 is provided on the top of the air valve electromagnet 39, and the electromagnet mounting bracket 38 is fixedly installed on the top of the air valve base 40. A plurality of air valve baffles 41 are provided inside the air valve base 40, and a connecting pin 42 is provided at the left and right ends of each air valve baffle 41, and each connecting pin 42 is connected to a connecting rod 43, and the connecting pin 42 passes through one end of the connecting rod 43 and is inserted into a corresponding hole on the side plate of the air valve base 40. With the above structure, the air valve baffle 41 can rotate relative to the air valve base 40 together with the connecting rod 43, and the air valve baffle 41 can rotate in the air valve base 40 to realize opening and closing, and when the connecting rod 43 rotates, it can drive the air valve baffle 41 to rotate.

[0130] A shutter connection plate 44 is arranged on both sides of the air valve base 40, and the other ends of all the connecting rods 43 on the same side of the air valve base 40 are rotatably connected to the corresponding shutter connection plate 44. A plurality of rotating shafts are arranged on the outer side of the shutter connection plate 44, and the other ends of the connecting rods 43 are connected to the corresponding rotating shafts. When the connecting rod 43 rotates, the other end of the connecting rod 43 will drive the shutter connection plate 44 to move.

[0131] A limiting rod 45 is also provided on the outer side of the louver connecting plate 44 , and an arc-shaped limiting groove 46 is opened on the side plate of the air valve base 40 . The limiting rod 45 is located in the arc-shaped limiting groove 46 , and the arc-shaped limiting groove 46 is used to limit the range of movement of the louver connecting plate 44 .

[0132] During installation, firstly, the connecting pins 42 at the left and right ends of the air valve baffle 41 are inserted into the connecting rods 43, and then the connecting pins 42 are inserted into the holes on the left and right sides of the air valve base 40. The connecting pins 42 can rotate relative to the air valve base 40, and then the shutter connecting plate 44 is connected to each of the connecting rods 43 through the rotating shaft thereon. Fig.11 The dotted lines in the figure represent the corresponding connection positions. In this embodiment, the number of the air valve baffles 41 is four, and the number of the connecting rods 43 is eight. When all the air valve baffles 41 are in a vertical state, the outlet surface of the air valve base 40 is just closed.

[0133] A magnetic plate 47 is connected between the two louver connecting plates 44, and the magnetic plate 47 cooperates with the air valve electromagnet 39. When the air valve electromagnet 39 is energized, the air valve electromagnet 39 attracts the magnetic plate 47 to move upward, thereby causing the louver connecting plates 44 to move upward, and the connecting rod 43 rotates accordingly, thereby causing the air valve baffle 41 to rotate as well.

[0134] The bottom of the two louver connecting plates 44 are respectively connected to a tension spring 48, the upper end of the tension spring 48 is fixed on the louver connecting plate 44, and the lower end of the tension spring 48 is fixed on a spring hook bracket 49, and the spring hook bracket 49 is fixedly connected to the bottom plate of the air valve base 40.

[0135] When the air valve baffle 41 is in a horizontal state (open state), the guide plate assembly 7 is in a fully open state, and low-temperature nitrogen can enter the cold therapy cabin 3 through the space between two adjacent air valve baffles 41. At this time, the tension spring 48 is in a tension state, and the shutter connecting plate 44 is at the lowest point under the tension of the tension spring 48; when the air valve electromagnet 39 is energized, the air valve electromagnet 39 attracts the magnetic suction plate 47 to move upward, so that the shutter connecting plate 44 overcomes the tension of the tension spring 48 and moves upward, and the connecting rod 43 rotates to drive the air valve baffle 41 to rotate. When the shutter connecting plate 44 moves to the highest point, the air valve baffle 41 is in a vertical state (closed state), and the space between two adjacent air valve baffles 41 is closed, so that low-temperature nitrogen cannot enter the cold therapy cabin 3. The air valve electromagnet 39 is connected to the control system, so that the automatic adjustment air valve 37 can be controlled by the control system.

[0136] The present invention uses electromagnets in many places. Compared with the common adjustment structures of motor gears or electric push rods, the electromagnets will not fail in low temperature environments, so their operation is more stable.

[0137] A safety grating 8 is provided inside the cryotherapy cabin 3 . The safety grating 8 is installed at the top inside the cryotherapy cabin 3 . The safety grating 8 is used to monitor the state of the human body in the cryotherapy cabin 3 .

[0138] A rotating pedal 9 is provided inside the cold therapy cabin 3, and a thrust ball bearing 20 and a sprocket 21 are provided at the bottom of the rotating pedal 9. The sprocket 21 is connected to the rotating pedal motor 19 through a roller chain 22. Driven by the rotating pedal motor 19, the rotating pedal 9 can rotate, and a person standing on the rotating pedal 9 will rotate slowly.

[0139] A lifting assembly 11 is provided at the bottom of the rotating pedal 9 , and the two are connected. The height of the rotating pedal 9 can be adjusted up and down following the lifting assembly 11 , thereby adjusting the height of the user in the cold therapy cabin 3 .

[0140] An infrared temperature measuring component 15 is arranged on the side surface inside the cold therapy cabin 3. The infrared temperature measuring component 15 includes an infrared temperature measuring camera 23 and an isolation glass 24. The isolation glass 24 is made of organic glass. The infrared temperature measuring camera 23 is located outside the isolation glass 24. The isolation glass 24 is used to isolate the low-temperature nitrogen to prevent the infrared temperature measuring camera 23 from being damaged at low temperatures. The infrared temperature measuring camera 23 is used to monitor the cooling of the user's body.

[0141] The cold therapy cabin 3 has a cabin insulation layer 14, the guide plate assembly 7 is arranged on the cabin insulation layer 14, the outlet of the atomization system 2 is inserted into the rear side of the cabin insulation layer 14 and connected to the guide plate assembly 7; the infrared temperature measurement assembly 15 is arranged in the left and right side walls of the cabin insulation layer 14, with two on each side.

[0142] The infrared temperature measuring camera 23 is connected to the display screen 12, so that the user's body temperature drop is reflected on the display screen 12 in the form of thermal imaging. The display screen 12 is connected to the control system. The control system adjusts the automatic regulating air valve 37 at different heights according to different temperature distributions, thereby controlling the input amount of low-temperature nitrogen and the concentration of low-temperature nitrogen at different heights, thereby achieving the purpose of temperature control.

[0143] The safety grating 8 is connected to the control system, and the cabin door opening and closing electromagnet 16 is also connected to the control system. When the user suffocates or other special circumstances occur and slides to the bottom of the cryotherapy cabin 3, the safety grating 8 cannot identify the human body and transmits the signal to the control system. The control system controls the liquid inlet solenoid valve 35 to close and stop delivering liquid nitrogen. At the same time, the control system controls the cabin door opening and closing electromagnet 16 to close, and the cabin door 17 is quickly opened under the action of the hydraulic pneumatic spring 5, and the low-temperature nitrogen in the cryotherapy cabin 3 is quickly discharged into the air to prevent further harm to the user.

[0144] In combination with the above structure, the working principle of the present invention is:

[0145] When the cryotherapy program is started, the control system controls the liquid inlet solenoid valve 35 to open, and the high-pressure liquid nitrogen is atomized into low-temperature nitrogen through the atomizing nozzle 55 and enters the atomizing box, and then enters the guide plate assembly 7 under the action of the liquid inlet fan 53, and the low-temperature nitrogen enters the cryotherapy cabin 3 through the automatic regulating air valve 37 of the guide plate assembly 7 to provide a low-temperature environment, and then enters the atomizing box again through the return air system 10, and then follows the low-temperature nitrogen to enter the cryotherapy cabin 3 again, thereby forming a cycle. The wind direction circulation process in the cryotherapy cabin 3 is as follows: Fig.15 and Fig.16 As shown;

[0146] During the cold therapy process, the user stands on the rotating pedal 9 and rotates slowly with the rotating pedal 9. At this time, the infrared temperature measuring camera 23 reflects the temperature drop of the human body monitored by the infrared temperature measuring camera 23 on the display screen 12 in the form of thermal imaging. At the same time, the control system automatically opens and closes the automatic regulating air valves 37 located at different heights according to different temperature distributions to control the low-temperature nitrogen concentration at different heights, thereby achieving the purpose of temperature control. The safety grating 8 located at the top of the cold therapy cabin 3 plays a role in monitoring the human body. When the user has suffocation or other special In special circumstances, when sliding to the bottom of the cryotherapy cabin 3, the safety grating 8 cannot identify the human body and transmits a signal to the control system, and the control system controls the liquid inlet solenoid valve 35 to be closed, so as to stop the introduction of low-temperature nitrogen into the cryotherapy cabin 3, and at the same time controls the door opening and closing electromagnet 16 used to lock and seal the cryotherapy cabin 3 to be powered off to eliminate its magnetism, and the hydraulic pneumatic spring 5 in a compressed state quickly pops open the door 17, and the low-temperature nitrogen in the cryotherapy cabin 3 is also quickly discharged into the air to prevent further harm to the user.

[0147] The present invention adopts the composite tank 1, and adopts the method of sleeve-fitting the vacuum insulation outer tank body 25 with the pressure inner tank body 26, which effectively reduces the consumption of liquid nitrogen in the pressure inner tank body 26. At the same time, since the volume of the pressure inner tank body 26 is small and does not reach the range of the pressure vessel, the qualification restriction of the pressure vessel is avoided, and the problem of the need for pressure vessel qualification restriction when the high-pressure atomization system is used for liquid nitrogen atomization in the cold therapy device in the prior art is solved;

[0148] The atomization system 2 of the present invention has a simple structure and sufficient atomization. The atomization system 2 consumes little liquid nitrogen. According to actual measurement, the liquid nitrogen consumption of the atomization system 2 of the present invention is 5L / 3min, which solves the problem that the atomization system 2 of the cryotherapy cabin in the prior art is complex and consumes a lot of liquid nitrogen.

[0149] The present invention uses a plurality of automatic regulating air valves 37 to accurately control the amount and height of low-temperature nitrogen gas introduced, and accurately controls the nitrogen concentration and temperature in the cryotherapy cabin 3, so that the temperature in the cryotherapy cabin 3 is uniform. At the same time, the rotating pedal 9 is used to enable the user to evenly cool down in the cryotherapy cabin 3, thereby improving the therapeutic effect and solving the problem of uneven cooling of the cryotherapy device in the prior art.

[0150] The present invention is provided with an infrared temperature measuring camera 23, and displays the human body cooling situation collected by it on the display screen 12 in real time, obtains human body cooling data in real time, and monitors the data so as to grasp the human body cooling situation in real time, avoid harm to the user caused by too low temperature, and stop cold therapy in time when the temperature drops too low; at the same time, the present invention is provided with a safety grating 8 in the cold therapy cabin 3 to monitor the state of the user. When the user suffocates or other special circumstances occur and slides to the bottom of the cold therapy cabin 3, the safety grating 8 can send a signal to the control system in time, and the control system controls the cabin door opening and closing electromagnet 16 to close, and cooperates with the hydraulic pneumatic spring 5 to quickly open the cabin door 17, which can effectively monitor and protect the user in real time, effectively reduce the risk of low-temperature nitrogen to the human body, and solve the safety problems existing in the cold therapy cabin in the prior art.

[0151] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A precise control liquid nitrogen cryotherapy system, Features: It comprises a composite tank, an atomization system and a cryotherapy cabin, wherein the composite tank is connected to the cryotherapy cabin through the atomization system; The composite tank comprises a vacuum insulation outer tank body and a pressure inner tank body, wherein the pressure inner tank body is located inside the vacuum insulation outer tank body, a liquid replenishing pipe is connected to the bottom of the pressure inner tank body, and liquid nitrogen in the vacuum insulation outer tank body is replenished into the pressure inner tank body through the liquid replenishing pipe, and the pressure inner tank body is connected to the atomization system through a liquid inlet pipe; The cold therapy cabin is provided with a guide plate assembly, the atomization system is connected to the guide plate assembly, the guide plate assembly comprises a guide plate, and a plurality of automatic regulating air valves are installed on the guide plate.

2. The precise control liquid nitrogen cryotherapy system according to claim 1, Features: A heating rod is arranged inside the pressure inner tank; The pressure inner tank is connected to a pressure sensor, the pressure sensor is used to measure the pressure inside the pressure inner tank, and the pressure sensor is connected to a control system; The heating rod is also connected to the control system, and the control system can control whether the heating rod is powered on; The liquid inlet pipe is provided with a liquid inlet solenoid valve, and the liquid inlet solenoid valve is also connected to the control system, and the control system can control whether the liquid inlet solenoid valve is opened.

3. The precise control liquid nitrogen cryotherapy system according to claim 2, Features: The liquid infusion tube is provided with a liquid infusion one-way valve; A liquid level gauge is arranged in the pressure inner tank body, and the liquid level gauge is connected to the control system.

4. The precise control liquid nitrogen cryotherapy system according to claim 1, Features: The automatic regulating air valve comprises an air valve base, a air valve solenoid is installed on the top of the air valve base, an air valve baffle is arranged inside the air valve base, connecting rods are arranged at the left and right ends of the air valve baffle, and the left and right ends of the air valve baffle are rotatably connected to the side plates on both sides of the air valve base respectively; The air valve baffle is connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the shutter connecting plate, and the shutter connecting plate is connected to a magnetic attraction plate, and the magnetic attraction plate cooperates with the air valve electromagnet; The air valve solenoid is connected to a control system.

5. The precise control liquid nitrogen cryotherapy system according to claim 4, Features: A plurality of the air valve baffles are arranged inside the air valve base, and a connecting pin is respectively arranged at the left and right ends of each of the air valve baffles, and each of the connecting pins is connected to a connecting rod, and the connecting pin passes through one end of the connecting rod and is inserted into a corresponding hole on the side plate of the air valve base; A louver connection plate is arranged on both sides of the interior of the air valve base, and the other ends of all the connecting rods located on the same side of the air valve base are rotatably connected to the corresponding louver connection plate.

6. The precise control liquid nitrogen cryotherapy system according to claim 4, Features: The bottom of the shutter connection plate is connected with a stretching device, the upper end of the stretching device is fixed on the shutter connection plate, the lower end of the stretching device is fixed on a spring hook bracket, and the spring hook bracket is fixedly connected to the bottom plate of the air valve base; When the air valve baffle is in an open state, the stretching device is in a stretched state.

7. The precise control liquid nitrogen cryotherapy system according to claim 4, Features: A rotating shaft is arranged on the outer side of the shutter connecting plate, and the other end of the connecting rod is connected to the corresponding rotating shaft; A limiting rod is arranged on the outer side of the shutter connecting plate, an arc-shaped limiting groove is opened on the side plate of the air valve base, and the limiting rod is located in the arc-shaped limiting groove.

8. The precise control liquid nitrogen cryotherapy system according to claim 1, Features: The atomization system comprises an atomization nozzle and an atomization box, the liquid inlet pipe is connected to the liquid inlet end of the atomization nozzle, and the nozzle end of the atomization nozzle is located in the atomization box; The nebulizer box comprises a nebulizer box shell and a nebulizer box fixed back plate, wherein the nebulizer box fixed back plate is connected to one side of the nebulizer box shell, the nebulizer box fixed back plate is connected to the cold therapy cabin, and an nebulizer box inner insulation layer is arranged in the nebulizer box shell; A liquid inlet fan and a heating belt are installed on the atomizer box shell. The heating belt is located inside the atomizer box. The fan blades of the liquid inlet fan are also located inside the atomizer box and behind the heating belt. The outlet of the liquid inlet fan is located outside the atomizer box, and the outlet of the liquid inlet fan is connected to the guide plate.

9. The precise control liquid nitrogen cryotherapy system according to claim 4, Features: An infrared temperature measuring component is arranged on the side of the interior of the cold therapy cabin, and the infrared temperature measuring component includes an infrared temperature measuring camera and an isolation glass. The infrared temperature measuring camera is located outside the isolation glass, and the infrared temperature measuring camera is connected to a display screen, and the display screen is connected to the control system. The control system adjusts the automatic regulating air valve according to different temperature distributions.

10. The precise control liquid nitrogen cryotherapy system according to claim 9, Features: A safety grating is provided inside the cryotherapy cabin, the safety grating is installed on the top of the cryotherapy cabin, and the safety grating is connected to the control system; The cryotherapy cabin is installed on a cabin frame, a door assembly is provided on one side of the cryotherapy cabin, the door assembly includes a door and a door frame, the door is installed on the door frame, the door cooperates with the cryotherapy cabin, the cryotherapy cabin is sealed when the door is closed, and the door frame is in contact with the cabin frame; A hydraulic-pneumatic device is provided between the cabin frame and the cabin door assembly, and when the cabin door is closed, the hydraulic-pneumatic device is in a compressed state; A hatch door opening and closing electromagnet assembly is provided on the cabin body frame, and the hatch door opening and closing electromagnet assembly is arranged on a side of the cabin body frame opposite to the hatch door assembly. The hatch door opening and closing electromagnet assembly includes multiple hatch door opening and closing electromagnets, and the hatch door opening and closing electromagnets cooperate with the mechanical mechanism on the hatch door to open or close the hatch door. The hatch door opening and closing electromagnets are connected to the control system, and the control system can control the hatch door opening and closing electromagnets to close according to the signal transmitted by the safety grating.

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