Temperature-controllable ventilation rewarming system

Abstract

The temperature-controllable ventilation and rewarming system comprises a heat preservation sleeping bag and a ventilation and rewarming main machine. A first air supply header pipe is inserted into a bag body of the heat preservation sleeping bag, the inner end of the first air supply header pipe is communicated with a second air supply header pipe arranged in the bag body, the two sides of the second air supply header pipe are communicated with four air supply branch pipes respectively, the four air supply branch pipes on each side are located above the chest, the abdomen, the thighs and the shanks of the human body respectively, a temperature sensor is arranged in the bag body, and an air return pipe is inserted into the bag body. A ventilation shell of the ventilation rewarming main machine is provided with an air inlet communicated with an air return pipe and an air outlet communicated with a first air supply header pipe, a power interface is embedded in the ventilation shell, a power management unit, a main control unit, an air power device and an air heating unit are fixed in the ventilation shell, and the power interface and the power management unit are connected to supply power to the system. The air inlet is connected with the air power device through the air inlet duct, the air power device is connected with an inlet of the gas heating unit through the air outlet connecting sleeve, and an outlet of the gas heating unit is connected with the air outlet through the air guide switching assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of biomedical engineering industry, and particularly relates to a temperature-controlled ventilation rewarming system. Background Art

[0002] The inventor of the present application previously applied for a patent for invention with the application number CN2022101052667 and the title of "A Ventilation Rewarming Device" for rewarming hypothermic casualties. In this patent, the air supply control unit includes a controller power supply, a DC power supply for the blower, a DC power supply for heating, a blower power supply controller, a heating power supply controller, a blower, and a controller. In this patent, the power supply is only applicable to DC power supply, the air supply is controlled by the air supply controller, the heating is controlled by the heating controller, and the air supply controller and the heating controller are further controlled by the overall controller. The present application has optimized the circuit structure design, so that the present application can not only achieve DC power supply but also AC power supply, and the air supply and heating processes are uniformly controlled by the control unit. The present application has also optimized the mechanical structure design, making the entire ventilation rewarming channel more reasonably designed and more conducive to air circulation.

[0003] In this patent, the air inflation bag is composed of an independently arranged bag body and an airway component. A plurality of air dispersion holes are provided at the top of the bag body, and a plurality of air dispersion holes are provided at the bottom of the airway component, so that the air supply first passes through the air dispersion holes of the airway component and then through the air dispersion holes of the bag body and enters the bag body to provide warm air for the casualties in the bag body. The present application has optimized the air inflation bag, designed an integrated thermal insulation sleeping bag, and optimized the arrangement of the air supply points and the heat distribution requirements of the thermal insulation sleeping bag, so that the rewarming in the thermal insulation sleeping bag is uniform. Summary of the Invention

[0004] The present invention aims at the problems and deficiencies existing in the prior art, and provides a novel temperature-controlled ventilation rewarming system.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a temperature-controlled ventilation rewarming system, which is characterized in that it includes a thermal insulation sleeping bag and a ventilation rewarming main unit;

[0007] The heat-insulating sleeping bag includes a sleeping bag body, in which a first air supply main pipe is inserted. The inner end of the first air supply main pipe is communicated with a second air supply main pipe disposed in the sleeping bag body along the length direction of the sleeping bag body. At least four air supply branch pipes disposed in the sleeping bag body along the width direction of the sleeping bag body are respectively communicated with both sides of the second air supply main pipe. Above the chest position, abdomen position, thigh position and calf position of the human body in the sleeping bag body are respectively arranged four air supply branch pipes on each side. At least one temperature sensor is disposed in the sleeping bag body, and a return air pipe is inserted into the sleeping bag body;

[0008] The ventilation and rewarming host includes a ventilation housing, on which an air inlet communicated with the return air pipe of the heat-insulating sleeping bag and an air outlet communicated with the first air supply main pipe are arranged. A power interface is embedded on the ventilation housing. A power management unit, a main control unit, an air power device and a gas heating unit are fixed in the ventilation housing. The power interface and the power management unit are electrically connected to supply power to the system. The air inlet is connected with the air power device through an air inlet duct. The air power device is connected with the inlet of the gas heating unit through an air outlet connecting sleeve. The outlet of the gas heating unit is connected with the air outlet through a wind guiding adapter assembly;

[0009] The main control unit is used to control the air power device to extract the air in the heat-insulating sleeping bag through the return air pipe, the air inlet and the air inlet duct, and then send the air into the gas heating unit through the air outlet connecting sleeve for heating. After heating, the air is successively sent into the heat-insulating sleeping bag through the wind guiding adapter assembly, the air outlet, the first air supply main pipe, the second air supply main pipe and each air supply branch pipe for rewarming. The main control unit receives the temperature in the heat-insulating sleeping bag detected by the temperature sensor, and controls the gas heating unit to heat until the temperature reaches the set temperature when the temperature does not reach the set temperature.

[0010] The positive and progressive effects of the present invention are as follows:

[0011] In the present invention, both the air supply pipeline and the return air pipeline are arranged on the sleeping bag body of the heat-insulating sleeping bag, and the layout of the air supply points and the heat distribution requirements inside the heat-insulating sleeping bag are optimized, so that the rewarming in the heat-insulating sleeping bag is uniform. Moreover, the air supply pipeline is also optimized. Two air supply main pipes and eight air supply branch pipes are adopted to realize uniform air supply.

[0012] The present invention can realize AC power supply and DC power supply, and the air supply and heating processes are uniformly controlled by the control unit. The present invention designs a ventilation and rewarming circulation channel: the air inlet communicated with the heat-insulating sleeping bag - the air inlet duct - the air power device - the air outlet connecting sleeve - the gas heating unit - the wind guiding adapter assembly - the air outlet communicated with the heat-insulating sleeping bag, so that the whole ventilation and rewarming circulation channel is designed more reasonably and is more conducive to the circulation of air, thereby realizing the ventilation and rewarming function of the heat-insulating sleeping bag. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the temperature-controlled ventilation rewarming system according to a preferred embodiment of the present invention.

[0014] Figures 2-3 It is a schematic diagram of the structure of the heat preservation sleeping bag according to a preferred embodiment of the present invention.

[0015] Figure 4 It is a partially enlarged schematic diagram at the air supply protection sleeve according to a preferred embodiment of the present invention.

[0016] Figure 5 It is an exploded view of the ventilation rewarming main unit according to a preferred embodiment of the present invention.

[0017] Figure 6 It is a control principle diagram of the ventilation rewarming main unit according to a preferred embodiment of the present invention.

[0018] Figures 7-8 It is a three-dimensional view (from the back angle) of the ventilation rewarming main unit according to a preferred embodiment of the present invention.

[0019] Figures 9-15 It is a schematic diagram of the internal structure of the ventilation rewarming main unit according to a preferred embodiment of the present invention.

[0020] Figure 16 It is a schematic diagram of the structure of the gas heating unit according to a preferred embodiment of the present invention.

[0021] Figure 17 It is a three-dimensional view (from the front angle) of the ventilation rewarming main unit according to a preferred embodiment of the present invention.

[0022] Figure 18 It is a schematic diagram of the structure of the air inlet duct according to a preferred embodiment of the present invention.

[0023] Figure 19 It is a circuit diagram of the main control unit according to a preferred embodiment of the present invention.

[0024] Figure 20 It is a circuit diagram of the AC / DC path management circuit according to a preferred embodiment of the present invention.

[0025] Figure 21 It is a circuit diagram of the voltage conversion circuit according to a preferred embodiment of the present invention. Specific embodiments

[0026] 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. Obviously, 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.

[0027] 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 facilitating the description of the technical solution of the present invention, and do not have a specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution 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 represent that the indicated components must be presented in the described positional relationships, and do not constitute a limiting effect on the technical solution of the present invention.

[0028] As Figures 1-21 shown, this embodiment provides a temperature controllable ventilation rewarming system, which includes a thermal insulation sleeping bag 100 and a ventilation rewarming host 200. The ventilation rewarming host 200 implements the ventilation rewarming function for the thermal insulation sleeping bag 100.

[0029] As Figures 2-4 shown, the thermal insulation sleeping bag 100 includes a sleeping bag body 101. A air supply protective sleeve 102 is inserted and fixed on the sleeping bag body 101. The other end of the air supply protective sleeve 102 is connected to the ventilation rewarming host 200. A first air supply main pipe 103 is inserted and fixed in the air supply protective sleeve 102. The outer end of the first air supply main pipe 103 is funnel-shaped. The outer end of the first air supply main pipe 103 is connected to the ventilation rewarming host 200. The inner end of the first air supply main pipe 103 is communicated with a second air supply main pipe 104 placed in the sleeping bag body 101 and arranged along the central axis in the length direction of the sleeping bag body. Four air supply branch pipes arranged along the width direction of the sleeping bag body are respectively communicated on both sides of the second air supply main pipe 104. From the perspective of a person lying in the sleeping bag body 101, the four air supply branch pipes on one side are respectively a left first air supply branch pipe 105, a left second air supply branch pipe 106, a left third air supply branch pipe 107 and a left fourth air supply branch pipe 108, and the four air supply branch pipes on the other side are respectively a right first air supply branch pipe 109, a right second air supply branch pipe 110, a right third air supply branch pipe 111 and a right fourth air supply branch pipe 112. The left first air supply branch pipe 105 and the right first air supply branch pipe 109 are symmetrically arranged and are above the chest position of the wounded person in the sleeping bag body 101. The left second air supply branch pipe 106 and the right second air supply branch pipe 110 are symmetrically arranged and are above the abdominal position of the wounded person in the sleeping bag body 101. The left third air supply branch pipe 107 and the right third air supply branch pipe 111 are symmetrically arranged and are above the thigh position of the wounded person in the sleeping bag body 101. The left fourth air supply branch pipe 108 and the right fourth air supply branch pipe 112 are symmetrically arranged and are above the calf position of the wounded person in the sleeping bag body 101.

[0030] A return air protection sleeve 113 is inserted and fixed on the sleeping bag body 101. The other end of the return air protection sleeve 113 is connected to the ventilation and rewarming main unit 200. A return air pipe 114 is inserted and fixed in the return air protection sleeve 113. The outer end of the return air pipe 114 is connected to the ventilation and rewarming main unit 200, and the inner end of the return air pipe 114 is placed inside the sleeping bag body 1.

[0031] In this embodiment, the thermal insulation sleeping bag is of a capsule structure. To achieve the purpose of uniform air supply, 8 relatively evenly arranged air supply ports are provided on the inner surface of the thermal insulation sleeping bag. An air inlet pipeline and a return air pipeline are arranged on the thermal insulation sleeping bag, forming a circulation loop with the ventilation and rewarming main unit 200 for the circulating transportation of warm air gas to realize the rewarming function of the thermal insulation sleeping bag.

[0032] A temperature sensor 115 is arranged inside the sleeping bag body 101. The temperature sensor 115 can be an NTC thermistor temperature sensor. The temperature sensor 115 can be specifically arranged on the outer wall of the part of the first air supply main pipe 103 located inside the sleeping bag body 101. The wire 1151 on the temperature sensor 115 is arranged along the outer wall of the first air supply main pipe 103 and passes through the air supply protection sleeve 102 and then is electrically connected to the ventilation and rewarming main unit 200. Of course, the temperature sensor 115 can also be arranged on the outer wall of the second air supply main pipe 104 or the outer wall of any air supply branch pipe, and the number of the temperature sensors 115 can also be set to multiple.

[0033] A mattress-type monitor (not shown in the figure, using an existing commercially available product) is laid on the inner bottom of the sleeping bag body 101, and the mattress-type monitor gets power from the ventilation and rewarming main unit 200.

[0034] In this embodiment, a mesh cloth 116 is fixed on the inner wall of the top of the sleeping bag body 101, and the second air supply main pipe 104 and each air supply branch pipe are placed between the inner wall of the top of the sleeping bag body 101 and the mesh cloth 116.

[0035] In this embodiment, zipper-type infusion disposal ports 117 are opened on the opposite sides of the sleeping bag body 101, facilitating infusion operations.

[0036] In this embodiment, a zipper opening corresponding to the position of the human body from the neck to the feet is opened on the sleeping bag body 101, and a waterproof zipper 118 is arranged at the zipper opening, facilitating the entry of the wounded. The waterproof zipper 118 can be a two-way opening and closing waterproof zipper.

[0037] In this embodiment, a head and face opening 119 is opened on the sleeping bag body 101, and a tightening rope is arranged at the head and face opening 119 for improving the rewarming efficiency and reducing heat loss. The structure can refer to the tightening rope at the head of a raincoat.

[0038] In this embodiment, a nameplate 120 is also attached to the outside of the sleeping bag body 101.

[0039] In this embodiment, a lashing cord 121 for lashing each air supply branch pipe, the first air supply main pipe 103, and the return air pipe 114 is fixed to the inner side of the sleeping bag body 101.

[0040] In this embodiment, the sleeping bag body 1 is composed of a sleeping bag outer layer, an intermediate heat-insulating layer, and a sleeping bag inner layer. Among them, both the sleeping bag outer layer and the sleeping bag inner layer are composed of a high-density nylon fabric layer, a TPU waterproof layer, and a flame-retardant coating that are laminated in sequence from the inside to the outside, and the intermediate heat-insulating layer is made of P cotton chain polymer porous cotton.

[0041] The operating environment of the heat-insulating sleeping bag in this embodiment is mainly a marine rescue platform, and the material selection of the heat-insulating sleeping bag is mainly carried out from aspects such as waterproofing, breathability, salt fog resistance, and flame retardancy.

[0042] According to the requirements of the use environment, the material of the sleeping bag outer layer is selected to be a material with waterproof, breathable, salt fog resistant, and flame retardant characteristics. In this embodiment, high-density nylon fabric is intended to be selected, and the base fabric has undergone post-treatments such as coating, water repellency, softening, and calendering, and a TPU material is added as the waterproof layer, and a flame-retardant coating is added outside the waterproof layer to make the material have good waterproof and flame retardant characteristics.

[0043] The material used for the sleeping bag inner layer is similar to that of the outer layer, and has the characteristics of lightness and smoothness. It can effectively reduce the friction between the human body and the sleeping bag during the use of the sleeping bag, increasing the tactile temperature of the sleeping bag; at the same time, the fabric will not cause sensory stimuli such as itching, roughness, or static electricity to the wounded when contacting the skin, and the overall comfort is better.

[0044] For the selection of the filling material of the intermediate heat-insulating layer of the sleeping bag, the moisture resistance and hydrophobic performance under the premise of lightness and warmth are mainly considered. In this embodiment, a new type of P cotton chain polymer porous cotton is selected as the heat-insulating layer material. This material has been processed by a special process in combination with the characteristics of ultra-fine fibers, and the finished material has softness, lightness, and water repellency. The water absorption of the long-chain polymer porous cotton is 1 / 3 of that of conventional fibers, and the heat preservation effect is increased by 14% when dry and 24% when wet. Compared with down, the common characteristics are fast heating speed, strong heat preservation ability, and good compressibility, but its hydrophobic ability in the water-sprayed state, heat preservation ability in the wet state, breathable and quick-drying effect, and wind resistance are better than down, and it is more suitable for use in special and harsh environments such as the sea.

[0045] As Figures 5-21 shown, the ventilation and rewarming host 200 includes a ventilation housing, the ventilation housing includes a ventilation front shell 201 and a ventilation rear cover 202, the ventilation front shell 201 and the ventilation rear cover 202 are covered and fixed by screws 203 (such as cross-recessed pan head screws M3×8), and a ventilation sealing strip 204 is arranged between the ventilation front shell 201 and the ventilation rear cover 202, and the ventilation sealing strip 204 is used to seal the ventilation front shell 201 and the ventilation rear cover 202. To improve the structural mechanical strength and electromagnetic compatibility of the ventilation and rewarming host, the ventilation housing is made of aluminum alloy material.

[0046] One side of the front ventilation housing 201 is provided with an air inlet 205 communicating with the return air duct 114 of the thermal insulation sleeping bag and an air outlet 206 communicating with the first air supply main pipe 103 of the thermal insulation sleeping bag. One side of the front ventilation housing 201 is fixedly connected to the other end of the air supply protection sleeve 102, and one side of the front ventilation housing 201 is fixedly connected to the other end of the return air protection sleeve 113.

[0047] On the other side of the front ventilation housing 201, an AC power interface 207, a DC power interface 208, and a data transmission interface 209 (such as a TYPE-C interface) are embedded. The AC power interface 207 is a socket-type filter. The socket-type filter 207 is fixed on the other side of the front ventilation housing 201 by screws 228 (such as cross-recessed pan head screws M3×10). A triangular socket plug 210 inserted into the socket-type filter 207 is fixed on the other side of the front ventilation housing 201. When the socket-type filter 207 is not needed, the triangular socket plug 210 is inserted to prevent dust and water. When the socket-type filter 207 is needed, the triangular socket plug 210 is removed. The DC power interface 208 is a DC power socket. A DC power waterproof plug 211 inserted into the DC power socket 208 is fixed on the other side of the front ventilation housing 201. When the DC power socket 208 is not needed, the DC power waterproof plug 211 is inserted to prevent dust and water. When the DC power socket 208 is needed, the DC power waterproof plug 211 is removed.

[0048] On the front of the front ventilation housing 201, a human-machine interaction interface 212 and a main machine switch 213 are embedded. A ventilation film 214 is pasted on the outer layer of the human-machine interaction interface 212.

[0049] A ventilation insulating frame 215 is fixed in the ventilation housing by screws 229 (such as cross-recessed pan head screws M3×8). A switching power supply 216 is fixed in the ventilation insulating frame 215. The AC power interface 207 is electrically connected to the switching power supply 216. When the AC power interface 207 is externally connected to AC220V, the AC power interface 207, that is, the socket-type filter, filters the externally connected AC220V and then transmits it to the switching power supply 216. The switching power supply 216 is used to convert the filtered AC220V into DC24V. It should be noted that the switching power supply 216 adopts the existing technology.

[0050] A power management unit 217, a main control unit 218, an aerodynamic device 219, and a gas heating unit 220 are fixed in the ventilation housing. Among them, the main control unit 218 adopts an MCU chip (see Figure 19);The aerodynamic device 219 uses a blower, such as a turbocharger blower, with a rubber shock absorber 230 fixed thereon and is fixed in the ventilation housing by a copper column 231 (hexagonal copper column M3×40). The main function of the turbocharger blower is to inhale the air in the thermal insulation sleeping bag and send it into the gas heating unit 220 for secondary heating.

[0051] The power management unit 217 includes an AC / DC path management circuit and a voltage conversion circuit. The AC power interface 207, the switching power supply 216, 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 208, the AC / DC path management circuit, and the voltage conversion circuit are electrically connected in sequence to form a DC power supply circuit.

[0052] Only when the AC power interface 207 is connected to the AC power supply AC220V, the switching power supply 216 is used to convert the AC power supply AC220V into the first DC power supply DC24V. The AC / DC path management circuit is used to select to transmit the first DC power supply DC24V to the voltage conversion circuit, and the voltage conversion circuit is used to convert the first DC power supply DC24V into the target DC power supply DC5V.

[0053] Only when the DC power interface 208 is connected to the DC power supply DC24V, the AC / DC path management circuit is used to select to transmit the DC power supply DC24V to the voltage conversion circuit, and the voltage conversion circuit is used to convert the DC power supply DC24V into the target DC power supply DC5V.

[0054] When the AC power interface 207 is connected to the AC power supply AC220V and the DC power interface 208 is connected to the DC power supply DC24V at the same time, the switching power supply 216 is used to convert the AC power supply AC220V into the first DC power supply DC24V. The AC / DC path management circuit is used to preferentially select to transmit the first DC power supply DC24V to the voltage conversion circuit, and the voltage conversion circuit is used to convert the first DC power supply DC24V into the target DC power supply DC5V.

[0055] Among them, see Figure 20, the AC / DC path management circuit includes: The AC terminal ACIN is connected to the switching power supply 216. Both pin 1 and pin 2 of the AC terminal ACIN are 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 DA2, 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 208. Both pin 1 and pin 2 of the DC terminal DCIN are 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 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 DA2 are both electrically connected to the voltage conversion circuit.

[0056] In the AC / DC path management circuit, combined with Figure 20 , when only AC power is input, AC power is used for power supply: When only ACIN supplies power, the triode QA8 conducts, which will pull down the collector voltage of the triode QA7, the triode QA7 cuts off, the field effect transistors QA3 and QA4 cut off, and ACIN makes the Schottky diode DA2 conduct for power supply, and then is converted to DC5V through the voltage conversion circuit.

[0057] When only DC power is input, DC power is used for power supply: When only DCIN supplies power, the triode QA8 cuts off, the triode QA7 conducts, the field effect transistors QA3 and QA4 conduct, and the VIN network is powered by DCIN, and then is converted to DC5V through the voltage conversion circuit.

[0058] When both AC power and DC power are input, AC power is preferentially used for power supply: When ACIN and DCIN supply power at the same time, the triode QA8 conducts, which will pull down the collector voltage of the triode QA7, the triode QA7 cuts off, the field effect transistors QA3 and QA4 cut off, and the DC power supplied by DCIN cannot be output to the VIN network. VIN is only powered by making the Schottky diode DA2 conduct through ACIN, and then is converted to DC5V through the voltage conversion circuit.

[0059] See Figure 21, the voltage conversion circuit includes: the anode of diode DD5 is connected to the drain of field effect transistor QA4 and pin 2 of Schottky diode DA2, and the cathode is electrically connected to pin 1 of DC-DC power module UD1 through inductors LDM1 and LDM2. The electrolytic capacitor CD1 and capacitor CD2 connected in parallel between inductors LDM1 and 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 also outputs DC5V through inductor DR1 to supply power to the electronic devices in the ventilation and rewarming system except the main control unit.

[0060] The voltage conversion circuit further includes: the IN pin (pin 1) and EN pin (pin 3) of voltage regulator chip UD4 are connected to DC5V, the GND pin (pin 2) is grounded. The EN pin (pin 3) of voltage regulator chip UD4 is grounded through capacitor CD15, the BP pin (pin 4) is grounded through capacitor CD17, the OUT pin (pin 5) outputs 3.3V to supply power to the main control unit and is also grounded through capacitor CD16 and electrolytic capacitor CD18 respectively.

[0061] In this embodiment, the power interface is divided into a DC power interface and an AC power interface, which can be used for power supply connection in different modes of DC24V and AC220V. Both 24V DC power and 220V AC power can be used as the external power supply.

[0062] In this embodiment, the air inlet 205 is connected to the air power device 219 through the air inlet duct 221. The air power device 219 is connected to the inlet of the gas heating unit 220 through the air outlet connection sleeve 222. The outlet of the gas heating unit 220 is connected to the air outlet 206 through the air guide transfer assembly 223. The main control unit 218 is electrically connected to the air power device 219 and the gas heating unit 220 respectively to control the air power device 219 to send the air at the air inlet 205 into the gas heating unit 220 for heating. The heated air is sent to the inside of the thermal insulation sleeping bag through the air outlet 206 to rewarm the thermal insulation sleeping bag.

[0063] Among them, referring to Figure 11 and Figure 16 , the gas heating unit 220 includes 4 heating tubes 2201 arranged side by side. The 4 heating tubes 2201 are sequentially connected and communicated. The inlet of the first heating tube 2201 is connected to the air outlet connection sleeve 222, and the outlet of the last heating tube 2201 is connected to the air guide transfer assembly 223. Each heating tube 2201 is provided with a PTC heating sheet 22011 inside, and the inner wall of each heating tube 2201 is in a U-shaped corrugated structure. Moreover, the outer layer of the gas heating unit 220 is wrapped with a heating protection sleeve 224, and a foam pad 225 is fixed on the back of the heating protection sleeve 224.

[0064] In this embodiment, the gas heating unit 220 is a set of heat exchange devices, mainly composed of multiple groups of heating pipelines. A sealing device (i.e., a heating protective sleeve 224) is designed outside the heat exchange chamber to reduce the loss of hot air and achieve thermal insulation effect. A PTC ceramic heating plate is used as a heating element inside the heat exchange chamber. The heating plate is closely attached to an aluminum alloy material with an inner wall designed as a U-shaped corrugated structure. The U-shaped corrugated structure fully exchanges heat with the gas when the gas passes through, thereby achieving the purpose of heating the gas.

[0065] The PTC heating element is an automatic constant temperature, power-saving electric heating device. It has the advantages of excellent heat conduction and heat dissipation performance, high heating efficiency, safety and reliability when working. The PTC heating element combined with the U-shaped corrugated structure also has the advantages of low thermal resistance and high heat exchange efficiency. When the fan stops due to a fault, the PTC heating unit cannot get sufficient heat dissipation, and its power will drop quickly and automatically. At this time, the surface temperature of the heater remains unchanged, and the surface "redness" and over-temperature phenomenon such as electric heating tube heaters will not occur.

[0066] The gas heating unit 220 uses a PTC ceramic heating sheet and an aluminum alloy heat dissipation pipeline to form a columnar PTC hollow heating rod. The entire gas heating unit 220 consists of 4 heating pipes, and the internal gas path is connected in series through holes and high-temperature resistant rubber sealing plugs. The length of each pipeline is 220mm, and the total gas path length is 880mm. According to thermal conductivity analysis and simulation experiments, the maximum temperature can be increased by 10℃ for every 100mm increase in the length of the heating pipe. The 4 heating pipes can ensure that the maximum heating speed requirements are met.

[0067] The heat conduction part adopts 1mm aluminum alloy 6061 stretching forming process, which is one-time stretching forming. This process combines the advantages of gluing and mechanical connection to ensure that there is no gas overflow during the heating process and reduce heat loss. The inner wall is designed as a U-shaped corrugated structure, which plays a role in increasing the heat conduction area and improving the heat conduction efficiency. In order to improve the heating efficiency, the gas heating unit 220 is composed of multiple groups of PTC ceramic heating hollow rods.

[0068] Among them, see Figure 11 and Figure 12 The air guide adapter assembly 223 includes an air guide adapter frame 2231 with a triangular cross-section fixed in the ventilation shell, the air guide adapter frame 2231 is covered with an air guide adapter cover 2232, the top of the side of the air guide adapter frame 2231 is provided with an air guide adapter interface 2233 connected to the outlet of the gas heating unit 220, an arc-shaped air guide plate 2234 is fixed to the upper part of the air guide adapter frame 2231 for guiding the air entering the air guide adapter interface 2233, and the lower part of the inner cavity of the air guide adapter frame 2231 is connected to the air outlet 206.

[0069] Among them, see Figure 9 and Figure 18, the top side of the air inlet duct 221 is fixedly connected to the air inlet 205. An arc-shaped air guiding plate 2211 for guiding the air entering from the air inlet 205 is fixed in the upper part of the air inlet duct 221. The lower part of the air inlet duct 221 is docked with the inlet of the air power device 219.

[0070] In this embodiment, both the human-machine interaction interface 212 and the main machine switch 213 are electrically connected to the main control unit 218. The human-machine interaction interface 212 is designed on the front end face of the main machine, facilitating the operator to set the working temperature and observe the operating status. The main machine switch 213 is used to control the power on and off of the ventilation and rewarming main machine.

[0071] The human-machine interaction interface 212 is divided into a display area and an operation area. The display area on the left can display the system power supply status, set temperature parameters, and actual temperature parameters. The temperature adjustment step is 0.1 °C, and the time adjustment step is 1 min. The operation area on the right can be used to set the temperature and start the device.

[0072] In this embodiment, the data transmission interface 209 is electrically connected to the main control unit 218. The data transmission interface 209 uses a Type-c cable, which is used to expand the connection to the display terminal and transmit data.

[0073] In this embodiment, the main control unit 218 is also connected to the temperature sensor 115 in the thermal insulation sleeping bag, receives the temperature inside the sleeping bag transmitted by the temperature sensor 115, controls the start or pause of the gas heating unit 220 according to the temperature inside the sleeping bag and the set temperature, and displays the temperature inside the sleeping bag and the set temperature through the human-machine interaction interface 212. If the temperature inside the sleeping bag does not reach the set temperature, the gas heating unit 220 is controlled to start heating. If the temperature inside the sleeping bag reaches the set temperature, the gas heating unit 220 is controlled to pause the heating operation.

[0074] In this embodiment, the main control unit 218 is also connected to a mattress-type monitor in the thermal insulation sleeping bag. The mattress-type monitor monitors the physiological signals of the wounded in the thermal insulation sleeping bag and transmits them to the upper computer, such as a computer, a mobile terminal, etc., through a wireless transmission method.

[0075] In addition, corner guards 226 are respectively fixed at the four corner positions on the front side and the four corner positions on the back side of the ventilation housing. The corners of the ventilation housing are all wrapped with corner guards 226 to enhance the anti-impact effect.

[0076] A retractable handle 227 is fixed on the top of the ventilation housing, facilitating the lifting of the ventilation and rewarming main machine.

[0077] The working process of the temperature - controllable ventilation rewarming system in this embodiment is as follows: Unzip the waterproof zipper 118. The hypothermic casualty lies in the thermal insulation sleeping bag, with the head and face exposed through the head and face opening 119 and tightened with the drawstring. Press the main unit switch 213. The main control unit 218 controls the air power device 219, the gas heating unit 220, the temperature sensor 115, and the mattress - type monitor to start working. The air power device 219 extracts the air in the thermal insulation sleeping bag through the return air duct 114, the air inlet 205, and the air inlet duct 221, and then sends the extracted air into the gas heating unit 220 through the air outlet connection sleeve 222 for heating. After heating, the air flows into the sleeping bag body 101 through the air guide adapter assembly 223, the air outlet 106, the first air supply main pipe 103, the second air supply main pipe 104, and each air supply branch pipe. And the warm air is evenly distributed in the sleeping bag body 101, playing a function of quickly rewarming the hypothermic casualty. During the rewarming process, the temperature sensor 115 in the thermal insulation sleeping bag continuously detects the temperature in the thermal insulation sleeping bag and transmits it to the main control unit 218 through the wire 1151. When the temperature in the thermal insulation sleeping bag has not reached the set temperature, the main control unit 218 controls the gas heating unit 220 to continue heating. When the temperature in the thermal insulation sleeping bag reaches the set temperature, the main control unit 218 controls the gas heating unit 220 to suspend the heating operation. When it is detected again that the temperature in the thermal insulation sleeping bag has not reached the set temperature, the heating is started again, and so on, achieving the effect that the temperature of the hot air inside the thermal insulation sleeping bag is balanced and consistent with the preset temperature. During the rewarming process, the mattress - type monitor in the thermal insulation sleeping bag continuously monitors the physiological signals of the casualty and transmits them to the upper computer.

[0078] 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. A temperature-controlled ventilation rewarming system, characterized in that, It includes a thermal insulation sleeping bag and a ventilation rewarming host; The thermal insulation sleeping bag includes a sleeping bag body, in which a first air supply main pipe is inserted. The inner end of the first air supply main pipe is communicated with a second air supply main pipe placed in the sleeping bag body and arranged along the length direction of the sleeping bag body. At least four air supply branch pipes arranged along the width direction of the sleeping bag body are respectively communicated on both sides of the second air supply main pipe and placed in the sleeping bag body. Above the chest position, abdominal position, thigh position and calf position of the human body in the sleeping bag body are respectively arranged four air supply branch pipes on each side. At least one temperature sensor is arranged in the sleeping bag body, and a return air pipe is inserted into the sleeping bag body; The ventilation rewarming host includes a ventilation housing, on which an air inlet communicated with the return air pipe of the thermal insulation sleeping bag and an air outlet communicated with the first air supply main pipe are arranged. A power interface is embedded on the ventilation housing. A power management unit, a main control unit, an air power device and a gas heating unit are fixed in the ventilation housing. The power interface and the power management unit are electrically connected to supply power to the system. The air inlet is connected with the air power device through an air inlet duct. The air power device is connected with the inlet of the gas heating unit through an air outlet connection sleeve. The outlet of the gas heating unit is connected with the air outlet through a wind guiding transfer assembly; The main control unit is used to control the air power device to extract the air in the thermal insulation sleeping bag through the return air pipe, air inlet and air inlet duct, and then send the air into the gas heating unit through the air outlet connection sleeve for heating. The heated air is successively sent to the thermal insulation sleeping bag through the wind guiding transfer assembly, air outlet, first air supply main pipe, second air supply main pipe and each air supply branch pipe for rewarming. The main control unit receives the temperature in the thermal insulation sleeping bag detected by the temperature sensor, and controls the gas heating unit to heat until the temperature reaches the set temperature when the temperature does not reach the set temperature.

2. The temperature-controllable ventilation rewarming system according to claim 1, characterized in that, The power interface includes an AC power interface and a DC power interface. The power management unit includes an AC / DC path management circuit and a voltage conversion circuit. A switching power supply is also fixed in the ventilation housing. The AC power interface, switching power supply, AC / DC path management circuit and voltage conversion circuit are successively electrically connected to form an AC power supply circuit. The DC power interface, AC / DC path management circuit and voltage conversion circuit are successively electrically connected to form a DC power supply circuit; Only when the AC power interface is connected to alternating current or when the AC power interface is connected to alternating current and the DC power interface is connected to direct current at the same time, the switching power supply is used to convert the alternating current into a first direct current. The AC / DC path management circuit is used to select to transmit the first direct current to the voltage conversion circuit. The voltage conversion circuit is used to convert the first direct current into a target direct current; Only when the DC power interface is connected to direct current, the AC / DC path management circuit is used to select to transmit the direct current to the voltage conversion circuit. The voltage conversion circuit is used to convert the direct current into a target direct current.

3. The temperature controllable ventilation 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 pins 3 and 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 supply interface. Pin 1 and pin 2 of the DC terminal DCIN are both grounded through the parallel-connected capacitors CA5 and CA6, and pins 3 and 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 voltage conversion circuit includes: The anode of the diode DD5 is connected to the drain of the field-effect transistor QA4 and pin 2 of the Schottky diode, and the cathode is electrically connected to pin 1 of the DC-DC power module UD1 through the inductors LDM1 and LDM2. The electrolytic capacitor CD1 and the capacitor CD2 connected in parallel between the inductors LDM1 and LDM2 are grounded. Pin 1 of the DC-DC power module UD1 is grounded through the capacitor CD3, and pin 2 is grounded. Pin 3 of the DC-DC power module UD1 is grounded through the capacitor CD4, and also outputs DC5V through the inductor DR1 to supply power to the electronic devices in the ventilation and rewarming host except for the main control unit; The voltage conversion circuit further includes: The IN pin and the EN pin of the voltage regulator chip UD4 are connected to 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, and is also grounded through the capacitor CD16 and the electrolytic capacitor CD18 respectively.

4. The temperature controllable ventilation rewarming system according to claim 2, wherein The DC power supply interface is a DC power socket, and a DC power waterproof plug inserted into the DC power socket is fixed on the side of the ventilation housing; The AC power supply interface is a socket-type filter, and a delta socket plug inserted into the socket-type filter is fixed on the side of the ventilation housing.

5. The temperature controllable ventilation rewarming system according to claim 2, wherein A ventilation insulating frame is also fixed inside the ventilation housing, and a switched-mode power supply is fixed inside the ventilation insulating frame.

6. The temperature-controlled ventilation rewarming system according to claim 1, wherein The gas heating unit includes multiple heating tubes arranged side by side. The multiple heating tubes are connected in sequence. The inlet of the first heating tube is connected to the air outlet connection sleeve, and the outlet of the last heating tube is connected to the air guiding transfer component. Each heating tube is provided with a PTC heating sheet inside, and the inner wall of each heating tube is in a U-shaped corrugated structure.

7. The temperature-controlled ventilation rewarming system according to claim 1, characterized in that, The air guiding transfer component includes an air guiding transfer frame with a triangular cross-section fixed in the ventilation housing. The air guiding transfer frame is covered with an air guiding transfer cover. The top of the side of the air guiding transfer frame is provided with an air guiding transfer port connected to the outlet of the gas heating unit. An arc-shaped air guiding plate for guiding the air entering through the air guiding transfer port is fixed in the upper part of the air guiding transfer frame. The lower part of the inner cavity of the air guiding transfer frame is docked with the air outlet.

8. The temperature-controlled ventilation rewarming system according to claim 1, characterized in that, The top of the side of the air inlet air duct is fixedly communicated with the air inlet. An arc-shaped air guiding plate for guiding the air entering through the air inlet is fixed in the upper part of the air inlet air duct. The lower part of the air inlet air duct is docked with the inlet of the air power device.

9. The temperature-controlled ventilation rewarming system according to claim 1, characterized in that, The outer layer of the gas heating unit is wrapped with a heating protection sleeve, and a foam pad is fixed on the back of the heating protection sleeve.

10. The temperature-controlled ventilation rewarming system according to claim 1, wherein A air supply protection sleeve and a return air protection sleeve are inserted and fixed on the sleeping bag body. The first air supply main pipe is fixedly arranged through the air supply protection sleeve, and the return air pipe is fixedly arranged through the return air protection sleeve. The outer end of the first air supply main pipe is in a funnel shape.

11. The temperature-controlled ventilation rewarming system according to claim 1, characterized in that, The second air supply main pipe is arranged along the central axis of the sleeping bag body in the length direction, and the four air supply branch pipes on one side are symmetrically arranged with the four air supply branch pipes on the other side.

12. The temperature-controlled ventilation rewarming system according to claim 1, wherein, A temperature sensor is arranged on at least one of the outer walls of the part of the first air supply main pipe located inside the sleeping bag body, the outer wall of the second air supply main pipe, and the outer walls of each air supply branch pipe.

13. The temperature-controllable ventilation rewarming system according to claim 1, characterized in that, A mattress-type monitor is laid at the bottom inside the sleeping bag body. The mattress-type monitor gets power from the ventilation and rewarming host, and the mattress-type monitor is used to transmit the monitored physiological signals to the upper computer.

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