Integrated compact type heating and humidifying breathing rewarming system

Abstract

According to the integrated compact type heating and humidifying breathing rewarming system, an oxygen supply air inlet, a breathing heating interface and a power interface are formed in a shell, and a power management unit, a main control unit, a breathing ventilation module, an inner breathing heating module, a switching assembly and a breathing atomization module are arranged in the shell; the breathing ventilation module, the switching assembly and the breathing atomization module are arranged on the same side from bottom to top, the power management unit, the main control unit and the inner breathing heating module are arranged on the other side from front to back, an outer breathing heating module and a breathing mask are arranged outside the shell, and a temperature sensor is arranged at the tail end of the outer breathing heating module. The oxygen supply air inlet communicates with an inlet of the breathing ventilation module, an outlet of the breathing ventilation module communicates with an inlet of the inner breathing heating module, an outlet of the inner breathing heating module communicates with a first inlet of the switching assembly, and an outlet of the breathing atomization module communicates with a second inlet of the switching assembly. An outlet of the switching assembly communicates with an inlet of the outer breathing heating module through the breathing heating connector, and an outlet of the outer breathing heating module communicates with the breathing mask.

Description

Technical Field

[0001] The invention relates to the technical field of biomedical engineering industry, and in particular to an integrated compact heating and humidifying respiratory rewarming system. Background Art

[0002] The inventor of the present invention previously applied for an invention patent with application number CN2022101051556 and the name of an auxiliary respiratory rewarming device, which is used for respiratory rewarming of hypothermic casualties. This existing patent is provided with a humidifier and a heater to heat and humidify the respiratory gas entering the respiratory mask for human breathing. The technical structure design of this existing patent is relatively rough. On this basis, the inventor of the present invention has further optimized the design of the respiratory rewarming device and designed a heating and humidifying respiratory rewarming structure with integrated structure and compact structural layout. Moreover, this existing patent can only realize DC power supply. The inventor of the present invention has further optimized the design and designed a power supply mode that can be DC powered, AC powered and battery powered, and manages DC power supply, AC power supply and battery power supply. Summary of the invention

[0003] In view of the problems and shortcomings of the prior art, the present invention provides an integrated compact heating and humidifying respiratory rewarming system.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides an integrated compact heating and humidifying respiratory rewarming system, which is characterized in that it comprises a shell, an oxygen supply air inlet and a respiratory heating interface are arranged on the shell, a power interface is embedded in the shell, a power management unit, a main control unit, a respiratory ventilation module, an internal respiratory heating module, a switching component and a respiratory atomization module are fixed in the shell, the respiratory ventilation module, the switching component and the respiratory atomization module are arranged in sequence from bottom to top on the same side, the respiratory ventilation module is arranged close to the oxygen supply air inlet, the respiratory atomization module is arranged close to the respiratory heating interface, the power management unit, the main control unit and the internal respiratory heating module are arranged front and back on the other side, an external respiratory heating module and a respiratory mask are arranged outside the shell, and a temperature sensor is arranged at the end of the external respiratory heating module;

[0006] The power interface and the power management unit are electrically connected to power the system, the oxygen supply inlet is communicated with the inlet of the breathing ventilation module, the outlet of the breathing ventilation module is communicated with the inlet of the internal breathing heating module, the outlet of the internal breathing heating module is communicated with the first inlet of the adapter component, the outlet of the breathing atomization module is communicated with the second inlet of the adapter component, the outlet of the adapter component is communicated with the inlet of the external breathing heating module through the breathing heating interface, and the outlet of the external breathing heating module is communicated with the breathing mask;

[0007] The main control unit is used to control the breathing ventilation module to extract breathing gas through the oxygen supply inlet, and then send it to the internal breathing heating module for heating. After heating, the breathing gas enters the transfer component. At the same time, it controls the breathing atomization module to generate atomized liquid and enter the transfer component. In the transfer component, the atomized liquid and the heated breathing gas are converged and humidified. It controls the external breathing heating module to heat and keep warm the incoming heated and humidified breathing gas again and send it to the breathing mask. It receives the temperature detected by the temperature sensor, and if the temperature does not reach the set temperature, it controls the internal breathing heating module and the external breathing heating module to heat until the temperature reaches the set temperature.

[0008] The positive and progressive effects of the present invention are as follows:

[0009] The present invention integrates a power management unit, a main control unit, a breathing ventilation module, an internal breathing heating module, a breathing atomization module, etc. within the system housing, and the layout of these module components is compact, making the overall structure small in volume.

[0010] The present invention realizes power supply modes of DC power supply, AC power supply, and battery power supply, and manages DC power supply, AC power supply, and battery power supply.

[0011] The present invention designs a heated and humidified breathing rewarming channel, where the heating channel is: oxygen supply inlet - breathing ventilation module - internal breathing heating module - transfer component - breathing heating interface - external breathing heating module - breathing mask, and the humidifying channel is: breathing atomization module - transfer component - breathing heating interface - external breathing heating module - breathing mask. The entire heated and humidified breathing rewarming channel is designed more reasonably and is more conducive to human breathing, thereby realizing the breathing rewarming function.

[0012] The present invention can not only realize passive breathing rewarming of the human body, but also realize active breathing rewarming of the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1-2 It is a schematic diagram of the overall structure of the integrated compact heated and humidified breathing rewarming system according to a preferred embodiment of the present invention.

[0014] Figure 3 It is a control schematic diagram of the integrated compact heated and humidified breathing rewarming system according to a preferred embodiment of the present invention.

[0015] Figure 4-5 It is a three-dimensional view (from two side angles) of the integrated compact heated and humidified breathing rewarming system according to a preferred embodiment of the present invention.

[0016] Figure 6 It is a three-dimensional view (from the back angle) of the integrated compact heated and humidified breathing rewarming system according to a preferred embodiment of the present invention.

[0017] Figure 7-11 Schematic diagram of the internal structure of the integrated compact heating and humidifying breathing rewarming system according to a preferred embodiment of the present invention.

[0018] Figure 12-13 Schematic diagram of the structure of the breathing ventilation component according to a preferred embodiment of the present invention.

[0019] Figure 14 Schematic diagram of the structure of the atomization component according to a preferred embodiment of the present invention.

[0020] Figure 15 Circuit diagram of the AC / DC path management circuit according to a preferred embodiment of the present invention.

[0021] Figure 16 Circuit diagram of the one-key switch circuit according to a preferred embodiment of the present invention.

[0022] Figure 17 Circuit diagram of the voltage conversion circuit according to a preferred embodiment of the present invention.

[0023] Figure 18 Circuit diagram of the main control unit according to a preferred embodiment of the present invention.

[0024] Figure 19 Circuit diagram of the fan drive circuit according to a preferred embodiment of the present invention.

[0025] Figure 20 Circuit diagram of the atomization drive circuit according to a preferred embodiment of the present invention.

[0026] Figure 21 Circuit diagram of the external breathing heating circuit according to a preferred embodiment of the present invention. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] For ease of description, only the parts related to the present invention are shown in the drawings. The first, second, etc. involved in the present invention are only for conveniently describing the technical solutions of the present invention and do not have specific limiting effects. They are all general references and do not constitute a limiting effect on the technical solutions of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The terms indicating positional relationships such as "middle", "horizontal", "vertical", "longitudinal", "front", "rear", "left", "right", "inner", "outer", etc. are based on the positional relationships shown in the displayed drawings and do not mean that the indicated components must be presented in the expressed positional relationships, and do not constitute a limiting effect on the technical solutions of the present invention.

[0029] As Figure 1-21 shown, this embodiment provides an integrated compact heating, humidifying and breathing rewarming system, including a housing 1. The housing 1 includes a front shell 101 and a rear cover 102. The front shell 101 and the rear cover 102 are fixed to each other and sealed by a sealing ring. A battery compartment 2 extending inward is provided on the rear cover 102. A shock-absorbing cotton 3 is installed in the battery compartment 2, and a battery 4 is placed in the shock-absorbing cotton 3. The battery compartment 2 is covered with a battery cover 5. To improve the structural mechanical strength and electromagnetic compatibility of the heating, humidifying and breathing rewarming system, the housing 1 is made of aluminum alloy material. The battery cover 5 can be opened to facilitate the replacement of the internal battery.

[0030] An oxygen supply inlet 6 is provided on the back of the housing 1, and a breathing heating interface 7 is provided on one side surface of the housing 1.

[0031] An AC power interface 8, a DC power interface 9 and a data transmission interface 10 are embedded on the other side surface of the housing 1. Among them, the AC power interface 8 is a socket-type filter. A triangular socket plug 11 is fixed on the other side surface of the housing 1. The triangular socket plug 11 is used to plug the socket-type filter 8. When the socket-type filter 8 is not in use, the triangular socket plug 11 is plugged in to achieve dust and water protection. When the socket-type filter 8 is in use, the triangular socket plug 11 is unplugged to connect to alternating current. The DC power interface 9 is a DC power socket. A DC power waterproof plug 12 is fixed on the other side surface of the housing 1. The DC power waterproof plug 12 is used to plug the DC power socket 9. When the DC power socket 9 is not in use, the DC power waterproof plug 12 is plugged in to achieve dust and water protection. When the DC power socket 9 is in use, the DC power waterproof plug 12 is unplugged to connect to direct current. The data transmission interface 10 is a Type-c interface.

[0032] A control panel 13 and a switch 14 are embedded on the front of the housing 1, and a protective film is attached to the surface of the control panel 13. The switch 14 is a waterproof switch with a waterproof grade of IP67, and the system can be started with one button. The control panel 13 is divided into a parameter display area, a working status display area, a power display area, and an operation area. The parameter display area can be used to set the reheating temperature and display the real-time temperature. The temperature adjustment step is 0.1°C and the time adjustment step is 1min; the working status display area can display the power supply status and heating status of the device; the power display area is used to display the remaining battery power. When the remaining battery power is too low, the power display color changes from green to red and a sound alarm is generated at the same time. The operation area can set the temperature and time, start and reset the device, and enable the ventilation function.

[0033] Corner guards 15 are fixed at the four corners of the front and back of the housing 1 to enhance the impact resistance. A retractable handle 16 is fixed at the top of the housing 1 for easy gripping.

[0034] A switching power supply fixing frame 17 is fixed in the housing 1, a switching power supply 18 (existing commercially available electronic device) is fixed in the switching power supply fixing frame 17, and the switching power supply 18 is electrically connected to the AC power supply interface 8. When the AC power supply interface 8 (i.e., the socket filter) is connected to AC220V, the socket filter 8 filters the AC220V and transmits it to the switching power supply 18, and the switching power supply 18 converts the filtered voltage into DC24V.

[0035] The housing 1 is integrated with a power management unit 19, a main control unit 20, a breathing ventilation module 21, an internal breathing heating module 22, an adapter assembly 26 and a breathing atomization module 23. The breathing ventilation module 21, the adapter assembly 26 and the breathing atomization module 23 are arranged in sequence from bottom to top on the same side. The breathing ventilation module 21 is arranged near the oxygen supply inlet 6, and the breathing atomization module 23 is arranged near the breathing heating interface 7. The breathing atomization module 23 is arranged at the top, and the breathing ventilation module 21 is arranged at the bottom. The power management unit 19, the main control unit 20 and the internal breathing heating module 22 are arranged front and back on the other side. The power management unit 19, the internal breathing heating module 22 and the main control unit 20 are arranged from back to front in sequence, and the internal breathing heating module 22 and the breathing atomization module 23 are arranged near the adapter assembly 26. An external breathing heating module 24 and a breathing mask 25 are arranged outside the housing 1. The head end (away from the breathing mask) and the end end (close to the breathing mask) of the external breathing heating module 24 are both provided with a temperature sensor 27.

[0036] In this embodiment, the power management unit 19 includes an AC / DC path management circuit, a one-key switch circuit, a power management module, and a voltage conversion circuit. The AC power interface 8, the switched-mode power supply 18, the AC / DC path management circuit, and the voltage conversion circuit are electrically connected in sequence to form an AC power supply circuit. The DC power interface, the AC / DC path management circuit, and the voltage conversion circuit are electrically connected in sequence to form a DC power supply circuit. The one-key switch circuit is electrically connected to the main control unit 20. The battery 4, the one-key switch circuit, and the voltage conversion circuit are electrically connected in sequence to form a battery power supply circuit. Both the AC / DC path management circuit and the battery 4 are electrically connected to the power management module. Among them, the power management module uses an IP2366 chip.

[0037] When only the battery 4 supplies power and the AC power interface 8 is connected to AC power to achieve AC power supply, or when the battery 4 supplies power, AC power is supplied, and the DC power interface 9 is connected to DC power to achieve DC power supply, the switched-mode power supply 18 is used to convert the AC power into a first DC power. The AC / DC path management circuit is used to select and transmit the first DC power VIN to the voltage conversion circuit. The voltage conversion circuit is used to convert the first DC power VIN into a target DC power. In this embodiment, compared with battery power supply and DC power supply, the priority of AC power supply is the highest, and the AC power supply method is preferentially used to supply power to the system.

[0038] When only the battery supplies power and the DC power interface is connected to DC power to achieve DC power supply, the AC / DC path management circuit is used to select and transmit the DC power VIN to the voltage conversion circuit. The voltage conversion circuit is used to convert the DC power VIN into a target DC power. In this embodiment, when both battery power supply and DC power supply exist and AC power is not supplied, compared with battery power supply, the priority of DC power supply is higher, and the DC power supply method is preferentially used to supply power to the system.

[0039] The one-key switch circuit is used to output the power supply voltage VOUT from the battery 4 to the voltage conversion circuit after receiving the power-on signal sent by the switch 14. The voltage conversion circuit is used to convert the power supply voltage VOUT into a target DC power.

[0040] When only the battery 4 supplies power, the voltage conversion circuit is used to convert the power supply voltage VOUT into a target DC power.

[0041] The power management module is used to collect the first DC power VIN or DC power VIN output by the AC / DC path management circuit and the voltage of the battery. When the first DC power VIN or DC power VIN is greater than the battery voltage by a certain set threshold, it controls the first DC power VIN or DC power VIN to charge the battery 4.

[0042] In this embodiment, at the starting time point of power-on, the system is powered on by the battery 4. After the starting time point of power-on, if only the battery supplies power, the battery 4 is used to supply power to the system; if both the battery and AC / DC power supplies are available, the AC / DC power supply is used to supply power to the system, and the AC power supply has priority over the DC power supply.

[0043] Among them, referring to Figure 15 , the AC / DC path management circuit includes: the AC terminal ACIN is connected to the switching power supply 18. The pins 1 and 2 of the AC terminal ACIN are both grounded through the parallel-connected capacitors CA3 and CA4, and the pins 3 and 4 are grounded. The pins 1 and 2 of the AC terminal ACIN are electrically connected to the pins 1 and 3 of the Schottky diode, and are also electrically connected to the base of the triode QA8 through the resistor RA13. The DC terminal DCIN is connected to the DC power supply interface. The pins 1 and 2 of the DC terminal DCIN are both grounded through the parallel-connected capacitors CA5 and CA6, and the pins 3 and 4 are grounded. The pins 1 and 2 of the DC terminal DCIN are electrically connected to the collector of the triode QA8 through the resistor RA11, and are also electrically connected to the drain of the field effect transistor QA3. The base of the triode QA8 is grounded through the resistor RA12, the collector is electrically connected to the base of the triode QA7, and the emitter is grounded. The base of the triode QA7 is grounded through the resistor RA10, and the collector is respectively connected to the gate of the field effect transistor QA3, one end of the resistor RA8, and the gate of the field effect transistor QA4 through the resistor RA9, and the emitter is grounded. The sources of the field effect transistors QA3 and QA4 are both connected to the other end of the resistor RA8. The drain of the field effect transistor QA4 and the pin 2 of the Schottky diode are both electrically connected to the voltage conversion circuit and output the first DC voltage VIN or the DC voltage VIN.

[0044] In the AC / DC path management circuit, if only the AC power supply interface 8 is connected to the AC power, the first DC voltage VIN corresponding to the AC is output; if only the DC power supply interface 9 is connected to the DC power, the DC voltage VIN corresponding to the DC is output; if both the AC power supply interface 8 is connected to the AC power and the DC power supply interface 9 is connected to the DC power, the first DC voltage VIN corresponding to the AC is output. It can be seen that in the AC / DC path management circuit, the AC power supply mode has priority over the DC power supply mode.

[0045] Referring to Figure 16, The one-key switch circuit includes: the source of the field effect transistor QA1 is electrically connected to the battery 4, and is also electrically connected to the collector of the triode QA2 through the resistors RA5 and RA4. The drain of the field effect transistor QA1 is electrically connected to the voltage conversion circuit to output the supply voltage VOUT to the voltage conversion circuit, and is also electrically connected to one end of the resistor RA2. The gate of the field effect transistor QA1 is electrically connected to the cathode of the diode DA1 through the resistor RA6, and is also electrically connected to the collector of the triode QA2 through the resistor RA4. The cathode of the diode DA1 accesses the switch 14 to receive the KEY signal sent by the switch 14. The anode of the diode DA1 powers on the main control unit 20 through the resistor RA7, converts the KEY signal into a POWER signal and transmits it to the main control unit 20, and is also electrically connected to the pin 2 of the TVS tube TVS1. The pin 1 of the TVS tube TVS1 and the emitter of the triode QA2 are grounded. The base of the triode QA2 is grounded through the capacitor CA2, grounded through the resistor RA3, electrically connected to the other end of the resistor RA2, and electrically connected to the main control unit through the resistor RA1 to receive the ONEKRY signal sent by the main control unit.

[0046] Press the switch 14, the one-key switch circuit receives the KEY signal, converts the KEY signal into a POWER signal through the diode DA1 and transmits it to the main control unit 20. The main control unit 20 then knows that it is powered on, outputs the ONEKRY signal to the one-key switch circuit, the triode QA2 in the one-key switch circuit conducts, QA1 conducts, and the battery 4 is used to output the supply voltage VOUT.

[0047] See Figure 17 , The voltage conversion circuit includes: the anode of the diode DD6 accesses the drain of the field effect transistor QA4 and the pin 2 of the Schottky tube in the AC-DC path management circuit to receive the direct current VIN, and the cathode is electrically connected to the pin 1 of the DC-DC power module UD1 through the inductors LDM1 and LDM2. The anode of the diode DD5 accesses the one-key switch circuit to receive the supply voltage VOUT, and the cathode is electrically connected to the inductor LDM1. The electrolytic capacitor CD1 and the capacitor CD2 connected in parallel between the inductors LDM1 and LDM2 are grounded. The pin 1 of the DC-DC power module UD1 is grounded through the capacitor CD3, and the pin 2 is grounded. The pin 3 of the DC-DC power module UD1 is grounded through the capacitor CD4 and outputs DC5V through the inductor DR1 to supply power to the electronic devices other than the main control unit.

[0048] The voltage conversion circuit also includes: the IN pin and the EN pin of the voltage regulator chip UD4 access DC5V, the GND pin is grounded. The EN pin of the voltage regulator chip UD4 is grounded through the capacitor CD15, the BP pin is grounded through the capacitor CD17, the OUT pin outputs 3.3V to supply power to the main control unit 20, and is also grounded through the capacitor CD16 and the electrolytic capacitor CD18 respectively.

[0049] In this embodiment, the main control unit uses an MCU chip, such as the model GD32F103C8T6 (see Figure 18 ).

[0050] In this embodiment, the respiratory ventilation module 21 includes a fan PCB board 211 and a respiratory ventilation component. A fan drive circuit is provided on the fan PCB board 211.

[0051] The respiratory ventilation component includes a fan base 212 fixed inside the housing 1. A fan fixing sleeve 213 is fixed on the fan base 212. A fan 214 (such as a turbine fan) is fixed on the fan fixing sleeve 213. The inlet of the fan 214 is connected to one end of an air inlet duct pipe 216 through an air inlet duct rubber part 215. The other end of the air inlet duct pipe 216 is connected to the oxygen supply inlet 6. The outlet of the fan 214 is connected to one end of an air outlet duct pipe 217. The other end of the air outlet duct pipe 217 is connected to the inlet of the internal respiration heating module 22 through an air outlet connection pipe 218. A one-way valve 219 is provided near the air outlet duct pipe 217 inside the air outlet connection pipe 218. The air outlet connection pipe 218 is also connected to the air inlet duct pipe 216. A sampling pipe 2110 is connected to the air outlet connection pipe 218. A pressure sensor is provided inside the sampling pipe 2110.

[0052] The fan drive circuit includes: the base of the triode Q3 is electrically connected to the main control unit through the resistor R21 and is also grounded through the resistor R22. The emitter of the triode Q3 is grounded. The collector of the triode Q3 is electrically connected to the gate of the field effect transistor Q4 through the resistor R20. The gate of the field effect transistor Q4 is electrically connected to the source of the field effect transistor Q4 through the resistor R19. The source of the field effect transistor Q4 is connected to DC5V. The drain of the field effect transistor Q4 is electrically connected to pin 2 of the fan interface through the inductor DR4. Both ends of the inductor DR4 are grounded through the capacitor C12 and the capacitor C13 respectively. Pin 1 of the fan interface is grounded and the pin is electrically connected to the main control unit. Pin 3 of the fan interface is electrically connected to the main control unit through the resistor R18, is also grounded through the resistor R18 and the capacitor C14, and is also electrically connected to the main control unit through the resistor R17. The fan interface is connected to the fan 214.

[0053] During passive breathing of the human body, the main control unit 20 is used to control the fan drive circuit to drive the fan 214 to start generating pipeline negative pressure, inhale respiratory gas through the air inlet duct pipe 216 and the oxygen supply inlet 6, and send it into the internal respiration heating module 22 for heating through the air outlet duct pipe 217 and the air outlet connection pipe 218, and control the fan drive circuit to adjust the power of the fan 214 according to the pressure value detected by the pressure sensor, so that the pressure value reaches the target pressure value, that is, the power of the fan 214 reaches the target power.

[0054] When the human body breathes spontaneously, the main control unit 20 is used to control the fan drive circuit not to drive the fan 214 to start. The human body breathes spontaneously to inhale external air through the air inlet pipe 216 and the oxygen supply inlet 6, and directly sends it to the internal breathing heating module 22 for heating through the air outlet connecting pipe 218.

[0055] In this embodiment, the internal breathing heating module 22 includes two heating tubes arranged side by side, the adjacent heating tubes are connected, the inlet of the first heating tube is connected to the air outlet connecting tube 218, and the outlet of the last heating tube is connected to the first inlet of the adapter assembly 26 through the hot air connecting tube 222. A PTC heating plate is provided in each heating tube, and the inner wall of each heating tube has a U-shaped corrugated structure. The outer layer of the two heating tubes arranged side by side is surrounded by a heating protection cover.

[0056] In this embodiment, the breathing atomization module 23 includes an atomization PCB board 230 and an atomization component. The atomization PCB board 230 is provided with an atomization driving circuit.

[0057] The atomizing assembly includes a liquid storage cup 231 fixed in the housing 1, the top cover of the liquid storage cup 231 is provided with a liquid storage cup cover 232, the bottom of the liquid storage cup 231 is provided with a communicating inclined cavity 233, an atomizing pump is fixed in the inclined cavity 233, the outlet of the inclined cavity 233 is sealed with an atomizing interface 234 through a silicone ring, and the atomizing interface 234 is connected to the second inlet of the adapter assembly 26. The liquid storage cup 231 is arranged on the side for easy removal and water addition.

[0058] The atomization drive circuit includes: the base of the transistor Q8 is electrically connected to the main control unit through the resistor R43 and is also grounded through the resistor R44, the emitter of the transistor Q8 is grounded, the collector of the transistor Q8 is electrically connected to the gate of the field effect transistor Q9 through the resistor R45, the gate of the field effect transistor Q9 is electrically connected to the source of the field effect transistor Q9 through the resistor R46, the source of the field effect transistor Q9 is connected to DC5V, the drain of the field effect transistor Q9 is electrically connected to the pin 2 of the humidification interface JSQ, and is also grounded through the capacitor C28, the pin 1 of the humidification interface JSQ is grounded, and the humidification interface JSQ is connected to the atomization pump.

[0059] The main control unit 20 is used to control the atomization driving circuit to drive the atomization pump to start working. The atomization pump uses the liquid in the liquid storage cup 231 to generate atomized liquid, and the atomized liquid flows into the adapter component 26 through the atomization interface 234.

[0060] In this embodiment, the adapter assembly 26 includes a Y-type adapter tube 261, and the notch cover on the Y-type adapter tube 261 is provided with an adapter cover 262. The first inlet of the Y-type adapter tube 261 is communicated with the outlet of the internal breathing heating module 22 (i.e., the hot air connecting pipe 222), the second inlet is communicated with the outlet of the breathing atomization module 23 (i.e., the atomization interface 234), and the outlet is connected to the inlet of the external breathing heating module 24 through the breathing heating interface 7.

[0061] In this embodiment, the external respiration heating module 24 includes an external respiration heating tube 241. A mask connection joint 242 is connected to the end of the external respiration heating tube 241, and a respiration valve 243 is provided on the mask connection joint 242.

[0062] The external respiration heating module 24 further includes an external respiration heating circuit, which can be integrated in the housing 1.

[0063] The external respiration heating circuit includes: the base of a triode Q5 is electrically connected to the main control unit through a resistor R23 and is also grounded through a resistor R24; the emitter of the triode Q5 is grounded; the collector of the triode Q5 is electrically connected to the gate of a field effect transistor Q6 through a resistor R25 and a diode D2 and is also electrically connected to the base of a triode Q7 through a resistor R25; the base of the triode Q7 is electrically connected to its collector through a resistor R26, the collector is connected to a voltage VOUT or a voltage VIN, and the emitter is electrically connected to the gate of the field effect transistor Q6; the source of the field effect transistor Q6 is connected to the voltage VOUT or the voltage VIN; the drain of the field effect transistor Q6 is connected to -5V through a resistor R27, is also electrically connected to pin 1 of a heating interface PIPE_TEM, and is also electrically connected to the positive input terminal of an operational amplifier U3A through a diode D3; pin 2 and pin 3 of the heating interface PIPE_TEM are grounded, and pin 4 is electrically connected to the main control unit; the negative input terminal of the operational amplifier U3A is grounded through a resistor R28 and is also electrically connected to the output terminal of the operational amplifier U3A through a resistor R29; the output terminal of the operational amplifier U3A is electrically connected to the negative input terminal of an operational amplifier U3B through a resistor R30; the upper control terminal of the operational amplifier U3A is connected to -5V and is also grounded through a capacitor C15; the lower control terminal of the operational amplifier U3A is grounded through a capacitor C16; the negative input terminal of the operational amplifier U3B is electrically connected to its output terminal through a resistor R31 and is grounded through a resistor R32 at the positive input terminal; the output terminal of the operational amplifier U3B is electrically connected to the main control unit through a resistor R33, is also grounded through the resistor R33 and a capacitor C17, and is also grounded through the resistor R33 and a diode D4; pin 1 and pin 2 of the heating interface PIPE_TEM are connected to a relatively long NTC thermistor (extending to the end inside the external respiration heating tube 241), and pin 3 and pin 4 are connected to a relatively short NTC thermistor (at the head end of the external respiration heating tube 241). The relatively long NTC thermistor can both implement the function of temperature detection (as a temperature sensor at the end) and heat the respiration tube through the NTC thermistor signal conduction line (as a heating resistance wire), and the relatively short NTC thermistor is used to implement the temperature detection function near the atomization component (as a temperature sensor at the head end). Among them, -5V can be obtained by converting DC5V to -5V with a low-power polarity inversion power converter.

[0064] The main control unit 20 sends a high-level signal, the transistor Q5 is turned on, the transistor Q6 is turned on, the voltage on the left side of the diode D3 is higher than the voltage on the right side, the diode D3 is turned off, and the NTC thermistor with a longer circuit realizes the heating function; the main control unit 20 sends a low-level signal, the transistor Q5 is not turned on, the transistor Q6 is turned off, the diode D3 is turned on, the main control unit 20 obtains the resistance value of the NTC thermistor with a longer circuit, and calculates the temperature value of the end of the external breathing heating tube 241 (near the breathing mask) by looking up the table. The main control unit 20 detects the resistance value of the NTC thermistor with a shorter circuit according to the program cycle, and calculates the temperature value of the head end of the external breathing heating tube 241 (near the atomization component).

[0065] In this embodiment, the breathing mask 25 is a disposable breathing mask.

[0066] The working principle of this embodiment is as follows: when the human body breathes passively, the main control unit 20 is used to control the fan drive circuit to drive the fan 214 to start generating a negative pressure in the pipeline, and the breathing gas is inhaled through the air inlet pipe 216 and the oxygen supply inlet port 6, and is sent to the internal breathing heating module 22 for heating through the air outlet pipe 217 and the air outlet connecting pipe 218. After heating, the breathing gas enters the adapter assembly 26.

[0067] When the human body breathes spontaneously, the main control unit 20 is used to control the fan drive circuit not to drive the fan 214 to start. The human body breathes spontaneously to inhale external air through the air inlet pipe 216 and the oxygen supply inlet 6, and directly sends it to the internal breathing heating module 22 for heating through the air outlet connecting pipe 218. After heating, the breathing gas enters the adapter assembly 26.

[0068] At the same time, the main control unit 20 is used to control the atomization drive circuit to drive the atomization pump to start. The atomization pump uses the liquid in the liquid storage cup 231 to produce atomized liquid. The atomized liquid flows into the adapter component 26 through the atomization interface 234. In the adapter component 26, the atomized liquid and the heated breathing gas converge to humidify.

[0069] The main control unit 20 is used to control the external breathing heating circuit to drive the NTC thermistor (as a heating resistor wire) with a longer circuit to reheat and keep warm the heated and humidified breathing gas entering the external breathing heating tube 241 and send it to the breathing mask 25.

[0070] The main control unit 20 is used to receive the temperature detected by the NTC thermistor (as the terminal temperature sensor) with a longer circuit. If the temperature does not reach the set temperature, the internal breathing heating module 22 and the external breathing heating module 24 are controlled to heat until the temperature reaches the set temperature.

[0071] In this embodiment, a dual heating structure of internal and external is designed. The internal respiration heating module 22 warms the breathing gas. However, there is still a certain distance between the gas outlet of the internal respiration heating module 22 and the human breathing port, and the heated gas cannot directly enter the human respiratory tract. At the same time, there will inevitably be some heat loss in the external breathing pipeline, resulting in a decrease in the gas temperature. Therefore, an external respiration heating module 24 is provided for heat preservation and further warming. Meanwhile, a temperature sensor 27 is designed at the end of the external heating pipeline, which can monitor and feedback the gas temperature in real time for closed-loop regulation and control.

[0072] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An integrated compact heating, humidifying and respiratory rewarming system, characterized in that, It comprises a shell, an oxygen supply air inlet and a breathing heating interface are arranged on the shell, a power interface is embedded on the shell, a power management unit, a main control unit, a breathing ventilation module, an internal breathing heating module, a switching component and a breathing atomization module are fixed in the shell, the breathing ventilation module, the switching component and the breathing atomization module are arranged in sequence from bottom to top on the same side, the breathing ventilation module is arranged close to the oxygen supply air inlet, the breathing atomization module is arranged close to the breathing heating interface, the power management unit, the main control unit and the internal breathing heating module are arranged front and back on the other side, an external breathing heating module and a breathing mask are arranged outside the shell, and a temperature sensor is arranged at the end of the external breathing heating module; The power interface and the power management unit are electrically connected to power the system, the oxygen supply inlet is communicated with the inlet of the breathing ventilation module, the outlet of the breathing ventilation module is communicated with the inlet of the internal breathing heating module, the outlet of the internal breathing heating module is communicated with the first inlet of the adapter component, the outlet of the breathing atomization module is communicated with the second inlet of the adapter component, the outlet of the adapter component is communicated with the inlet of the external breathing heating module through the breathing heating interface, and the outlet of the external breathing heating module is communicated with the breathing mask; The main control unit is used to control the breathing ventilation module to extract breathing gas through the oxygen supply inlet, and then send it to the internal breathing heating module for heating. The heated breathing gas enters the adapter assembly, and at the same time controls the breathing atomization module to produce atomized liquid that enters the adapter assembly. The atomized liquid humidifies the heated breathing gas in the adapter assembly, controls the external breathing heating module to reheat and keep the heated and humidified breathing gas warm and send it to the breathing mask, receives the temperature detected by the temperature sensor, and controls the internal and external breathing heating modules to heat until the temperature reaches the set temperature if the temperature does not reach the set temperature.

2. The integrated compact heating, humidifying and breathing rewarming system according to claim 1, wherein, The power interface includes an AC power interface and a DC power interface, the power management unit includes an AC / DC path management circuit, a one-touch switch circuit, a power management module and a voltage conversion circuit, a switching power supply and a battery are also provided in the housing, the AC power interface, the switching power supply, the AC / DC path management circuit and the voltage conversion circuit are electrically connected in sequence to form an AC power supply circuit, the DC power interface, the AC / DC path management circuit and the voltage conversion circuit are electrically connected in sequence to form a DC power supply circuit, the one-touch switch circuit is electrically connected to the main control unit, the battery, the one-touch switch circuit and the voltage conversion circuit are electrically connected in sequence to form a battery power supply circuit, and the AC / DC path management circuit and the battery are both electrically connected to the power management module; When only the battery and the AC power interface are connected to AC power to realize AC power supply, or when the battery, AC power supply and DC power interface are connected to DC power to realize DC power supply, the switching power supply is used to convert the AC power into a first DC power, the AC / DC path management circuit is used to select to transmit the first DC power VIN to the voltage conversion circuit, and the voltage conversion circuit is used to convert the first DC power VIN into a target DC power; When only powered by DC power through the battery power supply and the DC power interface simultaneously, the AC / DC path management circuit is used to select and transmit the DC power VIN to the voltage conversion circuit, and the voltage conversion circuit is used to convert the DC power VIN into the target DC power; The one-key switch circuit is used to supply the power supply voltage VOUT from the battery to the voltage conversion circuit after receiving the power-on signal, and the voltage conversion circuit is used to convert the power supply voltage VOUT into the target DC power; When only powered by the battery, the voltage conversion circuit is used to convert the power supply voltage VOUT into the target DC power; The power management module is used to collect the first DC power VIN or the DC power VIN output by the AC / DC path management circuit and the voltage of the battery, and control the first DC power VIN or the DC power VIN to charge the battery when the first DC power VIN or the DC power VIN is greater than a certain set threshold of the battery voltage.

3. The integrated compact warming, humidifying and breathing rewarming system according to claim 2, wherein The AC / DC path management circuit includes: the AC terminal ACIN is connected to the switched-mode power supply. Pin 1 and pin 2 of the AC terminal ACIN are both grounded through the parallel-connected capacitors CA3 and CA4, and pin 3 and pin 4 are grounded. Pin 1 and pin 2 of the AC terminal ACIN are electrically connected to pin 1 and pin 3 of the Schottky diode, and are also electrically connected to the base of the triode QA8 through the resistor RA13. The DC terminal DCIN is connected to the DC power interface. Pin 1 and pin 2 of the DC terminal DCIN are both grounded through the parallel-connected capacitors CA5 and CA6, and pin 3 and pin 4 are grounded. Pin 1 and pin 2 of the DC terminal DCIN are electrically connected to the collector of the triode QA8 through the resistor RA11, and are also electrically connected to the drain of the field effect transistor QA3. The base of the triode QA8 is grounded through the resistor RA12, the collector is electrically connected to the base of the triode QA7, and the emitter is grounded. The base of the triode QA7 is grounded through the resistor RA10, and the collector is respectively connected to the gate of the field effect transistor QA3, one end of the resistor RA8, and the gate of the field effect transistor QA4 through the resistor RA9, and the emitter is grounded. The source of the field effect transistor QA3 and the source of the field effect transistor QA4 are both connected to the other end of the resistor RA8. The drain of the field effect transistor QA4 and pin 2 of the Schottky diode are both electrically connected to the voltage conversion circuit; The one-key switch circuit includes: the source electrode of field effect transistor QA1 is electrically connected to the battery, and is also electrically connected to the collector electrode of triode QA2 through resistor RA5 and resistor RA4. The drain electrode of field effect transistor QA1 is electrically connected to the voltage conversion circuit to output the supply voltage VOUT to the voltage conversion circuit, and is also electrically connected to one end of resistor RA2. The gate electrode of field effect transistor QA1 is electrically connected to the cathode of diode DA1 through resistor RA6, and is also electrically connected to the collector electrode of triode QA2 through resistor RA4. The cathode of diode DA1 is connected to the switch to receive the KEY signal sent by the switch. The anode of diode DA1 powers on the main control unit through resistor RA7, converts the KEY signal into a POWER signal and transmits it to the main control unit, and is also electrically connected to pin 2 of TVS tube TVS1. Pin 1 of TVS tube TVS1 and the emitter electrode of triode QA2 are grounded. The base electrode of triode QA2 is grounded through capacitor CA2, grounded through resistor RA3, electrically connected to the other end of resistor RA2, and electrically connected to the main control unit through resistor RA1 to receive the ONEKRY signal sent by the main control unit.

4. The integrated compact heating, humidifying and breathing rewarming system according to claim 3, characterized in that The voltage conversion circuit includes: the anode of diode DD6 is connected to the drain electrode of field effect transistor QA4 and pin 2 of the Schottky tube in the AC-DC path management circuit to receive the direct current VIN, and the cathode is electrically connected to pin 1 of DC-DC power module UD1 through inductor LDM1 and inductor LDM2. The anode of diode DD5 is connected to the one-key switch circuit to receive the supply voltage VOUT, and the cathode is electrically connected to inductor LDM1. The electrolytic capacitor CD1 and capacitor CD2 connected in parallel between inductor LDM1 and inductor LDM2 are grounded. Pin 1 of DC-DC power module UD1 is grounded through capacitor CD3, and pin 2 is grounded. Pin 3 of DC-DC power module UD1 is grounded through capacitor CD4 and outputs DC5V through inductor DR1 to supply power to electronic devices other than the main control unit; The voltage conversion circuit further includes: the IN pin and EN pin of voltage regulator chip UD4 are connected to DC5V, the GND pin is grounded. The EN pin of voltage regulator chip UD4 is grounded through capacitor CD15, the BP pin is grounded through capacitor CD17, the OUT pin outputs 3.3V to supply power to the main control unit, and is grounded through capacitor CD16 and electrolytic capacitor CD18 respectively.

5. The integrated compact heating, humidifying and breathing rewarming system according to claim 1, wherein, The respiratory ventilation module includes a fan PCB board and a respiratory ventilation component, and a fan drive circuit is provided on the fan PCB board; The breathing ventilation assembly comprises a fan base fixed in the shell, a fan fixing sleeve is fixed on the fan base, a fan is fixed on the fan fixing sleeve, the inlet of the fan is connected to one end of the air inlet pipe through the air inlet rubber piece, the other end of the air inlet pipe is connected to the oxygen supply inlet, the outlet of the fan is connected to one end of the air outlet pipe, the other end of the air outlet pipe is connected to the internal breathing heating module through the air outlet connecting pipe, a one-way valve is arranged in the air outlet connecting pipe near the air outlet pipe, the air outlet connecting pipe is also connected to the air inlet pipe, the air outlet connecting pipe is connected to a sampling pipe, and a pressure sensor is arranged in the sampling pipe; The fan drive circuit includes: the base of the transistor Q3 is electrically connected to the main control unit through the resistor R21 and is also grounded through the resistor R22, the emitter of the transistor Q3 is grounded, the collector of the transistor Q3 is electrically connected to the gate of the field effect transistor Q4 through the resistor R20, the gate of the field effect transistor Q4 is electrically connected to the source of the field effect transistor Q4 through the resistor R19, the source of the field effect transistor Q4 is connected to DC5V, the drain of the field effect transistor Q4 is electrically connected to the pin 2 of the fan interface through the inductor DR4, the two ends of the inductor DR4 are respectively grounded through the capacitor C12 and the capacitor C13, the pin 1 of the fan interface is grounded and the pin is electrically connected to the main control unit, the pin 3 of the fan interface is electrically connected to the main control unit through the resistor R18, is also grounded through the resistor R18 and the capacitor C14, and is also electrically connected to the main control unit through the resistor R17, and the fan interface is connected to the fan; When the human body breathes passively, the main control unit is used to control the fan drive circuit to drive the fan to start and generate negative pressure in the pipeline, inhale the breathing gas through the air inlet pipe and the oxygen supply inlet, and send it to the internal breathing heating module for heating through the air outlet pipe and the air outlet connecting pipe, and control the fan drive circuit to adjust the power of the fan according to the pressure value detected by the pressure sensor, so that the pressure value reaches the target pressure value; When the human body breathes spontaneously, the main control unit is used to control the fan drive circuit not to drive the fan to start. The human body breathes spontaneously to inhale external air through the air inlet pipe and the oxygen supply inlet, and directly sends it to the internal breathing heating module for heating through the air outlet connecting pipe.

6. The integrated compact warming, humidifying and breathing rewarming system according to claim 5, wherein The internal breathing heating module includes a plurality of heating tubes arranged side by side, the adjacent heating tubes are connected, the inlet of the first heating tube is connected to the air outlet connecting tube, the outlet of the last heating tube is connected to the first inlet of the adapter assembly through the hot air connecting tube, each heating tube is provided with a PTC heating plate, and the inner wall of each heating tube has a U-shaped corrugated structure.

7. The integrated compact warming, humidifying and breathing rewarming system according to claim 1, wherein, The breathing atomization module comprises an atomization PCB board and an atomization assembly, and the atomization PCB board is provided with an atomization drive circuit; The atomization assembly includes a liquid storage cup fixed in the housing, the top cover of the liquid storage cup is provided with a liquid storage cup cover, the bottom of the liquid storage cup is provided with a communicating inclined cavity, an atomization pump is fixed in the inclined cavity, the outlet of the inclined cavity is sealed with an atomization interface through a silicone ring, and the atomization interface is communicated with the second inlet of the adapter assembly; The atomization drive circuit includes: the base of the transistor Q8 is electrically connected to the main control unit through the resistor R43 and is also grounded through the resistor R44, the emitter of the transistor Q8 is grounded, the collector of the transistor Q8 is electrically connected to the gate of the field effect transistor Q9 through the resistor R45, the gate of the field effect transistor Q9 is electrically connected to the source of the field effect transistor Q9 through the resistor R46, the source of the field effect transistor Q9 is connected to DC5V, the drain of the field effect transistor Q9 is electrically connected to the pin 2 of the humidification interface JSQ and is also grounded through the capacitor C28, the pin 1 of the humidification interface JSQ is grounded, and the humidification interface JSQ is connected to the atomization pump; The main control unit is used to control the atomization drive circuit to drive the atomization pump to start. The atomization pump uses the liquid in the liquid storage cup to generate atomized liquid, and the atomized liquid flows into the adapter assembly through the atomization interface.

8. The integrated compact warming, humidifying and breathing rewarming system according to claim 1, wherein The adapter assembly includes a Y-type adapter tube, a notch cover on the Y-type adapter tube is provided with an adapter cover, a first inlet of the Y-type adapter tube is communicated with an outlet of an internal breathing heating module, a second inlet is communicated with an outlet of a breathing atomization module, and an outlet is communicated with a breathing heating interface.

9. The integrated compact warming, humidifying and breathing rewarming system according to claim 1, wherein, The external breathing heating module comprises an external breathing heating pipe; The external respiration heating module further includes an external respiration heating circuit, and the external respiration heating circuit includes: the base of triode Q5 is electrically connected to the main control unit through resistor R23 and is also grounded through resistor R24. The emitter of triode Q5 is grounded. The collector of triode Q5 is electrically connected to the gate of field effect transistor Q6 through resistor R25 and diode D2 and is also electrically connected to the base of triode Q7 through resistor R25. The base of triode Q7 is electrically connected to its collector through resistor R26, the collector is connected to voltage VOUT or voltage VIN, and the emitter is electrically connected to the gate of field effect transistor Q6. The source of field effect transistor Q6 is connected to voltage VOUT or voltage VIN. The drain of field effect transistor Q6 is connected to -5V through resistor R27, is also electrically connected to pin 1 of the heating interface PIPE_TEM, and is also electrically connected to the positive input terminal of operational amplifier U3A through diode D3. Pin 2 and pin 3 of the heating interface PIPE_TEM are grounded, and pin 4 is electrically connected to the main control unit. The negative input terminal of operational amplifier U3A is grounded through resistor R28 and is also electrically connected to the output terminal of operational amplifier U3A through resistor R29. The output terminal of operational amplifier U3A is electrically connected to the negative input terminal of operational amplifier U3B through resistor R30. The upper control terminal of operational amplifier U3A is connected to -5V and is also grounded through capacitor C15. The lower control terminal of operational amplifier U3A is grounded through capacitor C16. The negative input terminal of operational amplifier U3B is electrically connected to its output terminal through resistor R31, and the positive input terminal is grounded through resistor R32. The output terminal of operational amplifier U3B is electrically connected to the main control unit through resistor R33, is also grounded through resistor R33 and capacitor C17, and is also grounded through resistor R33 and diode D4. Pin 1 and pin 2 of the heating interface PIPE_TEM are connected to a first NTC thermistor with a relatively long line that extends to the end inside the external respiration heating tube, and pin 3 and pin 4 are connected to a second NTC thermistor with a relatively short line at the head end of the external respiration heating tube. The first NTC thermistor is used as both a temperature sensor and a heating resistance wire, and the second NTC thermistor is used as a temperature sensor; wherein, -5V can be obtained by converting DC5V to -5V with a low-power polarity inversion power converter; The main control unit is used to emit a high-level signal, triode Q5 conducts, triode Q6 conducts, the voltage on the left side of diode D3 is higher than that on the right side, diode D3 turns off, and the first NTC thermistor realizes the heating function; the main control unit is used to emit a low-level signal, triode Q5 does not conduct, triode Q6 cuts off, diode D3 conducts, the main control unit obtains the resistance value of the first NTC thermistor, calculates the temperature value at the end of the external respiration heating tube through look-up table, and detects the resistance value of the second NTC thermistor to calculate the temperature value at the head end of the external respiration heating tube.

10. The integrated compact warming, humidifying and breathing rewarming system according to claim 1, wherein, The housing includes a front shell and a rear cover. The front shell and the rear cover are fixed and sealed by a sealing ring. A battery compartment is provided on the rear cover. A shock-absorbing cotton is installed in the battery compartment. A battery is placed in the shock-absorbing cotton. The battery compartment cover is provided with a battery cover.

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