A split type intelligent cooling protective hood

Abstract

The present invention discloses a split-type intelligent cooling protective hood, comprising: a hood body; a headband assembly, which is detachably arranged inside the hood body, and whose lower edge is provided with an air inlet, an air return port and a first temperature and humidity sensor; a ventilation duct, which has an air inlet cavity and an air return cavity, the distal end of the air inlet cavity is connected to the air inlet, and the distal end of the air return cavity is connected to the air return port; and a powered air supply assembly, the outlet of which is connected to the proximal end of the air inlet cavity, and the inlet of which is connected to the proximal end of the air return cavity and the new air port. The split-type intelligent cooling protective hood provided by the present invention adopts a split-type structural design for the hood body and the powered air supply assembly, monitors the temperature and humidity conditions inside the hood body in real time, and accurately controls and adjusts the temperature and humidity inside the hood body through the powered air supply assembly and the air return structure design, so that the hood is suitable for wearing and using in a high temperature environment, and is particularly suitable for providing better safety protection for clinical and epidemic prevention personnel working indoors and outdoors in summer.

Description

Technical Field

[0001] The invention relates to the field of personal protective equipment, and in particular to a split-type intelligent cooling protective hood. Background Art

[0002] Although the development of science and technology in modern society has led to the continuous upgrading of medical methods and medical equipment, various viruses have also been constantly changing with the medical environment. In recent years, new infectious bacteria have continued to emerge, especially the spread of various coronaviruses, which has caused great harm to the people. The transmission routes of these viruses can even be through droplets and aerosols between people, so the requirements for personal protection are getting higher and higher.

[0003] At present, the main forms of personal protection are masks, goggles, protective screens and protective clothing. Very few medical staff use fully enclosed chemical protective clothing. Although chemical protective clothing can provide comprehensive protection, it is very expensive, complicated, time-consuming to put on and take off, and extremely uncomfortable. It is suitable for protecting against physical and chemical damage such as phosgene and nuclear radiation dust, but it is a bit overprotective and even wasteful for respiratory diseases that are mainly transmitted through the air. Masks, goggles, protective screens and protective clothing cannot completely prevent the inhalation of extremely fine pathogens (such as viruses) from the gaps in masks and goggles, so it is difficult to block transmission routes such as aerosols.

[0004] In addition, in order to prevent the spread of diseases transmitted through the air, related positive pressure hoods have been developed in the prior art, such as powered air-purifying respirators, which use positive pressure to send clean air into the hood to form a positive pressure inside the hood, which can effectively block the transmission pathways of aerosols of fine pathogens and achieve personal protection. However, the existing powered air-purifying respirators and hoods have poor air permeability when used together, body heat cannot be dissipated, the humidity inside the hood is too high, the wearing comfort is poor, the field of vision is narrow, and the communication is poor, which is especially not suitable for use in high temperature environments. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in view of the defects of the prior art such as poor air permeability, poor heat dissipation, excessively high temperature and humidity inside the hood, poor wearing comfort, narrow field of vision and poor communication, a split intelligent cooling protective hood is proposed.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention provides a split-type intelligent cooling protective head cover, comprising:

[0008] A cover body;

[0009] A headband assembly, which is detachably arranged inside the cover body, and has an air inlet, an air return port and a first temperature and humidity sensor at its lower edge;

[0010] a ventilation duct, the ventilation duct having an air inlet cavity and a return air cavity, the distal end of the air inlet cavity is connected to the air inlet, and the distal end of the return air cavity is connected to the return air cavity; and

[0011] A powered air supply component, the air outlet of the powered air supply component is connected to the proximal end of the air inlet cavity, and the air inlet thereof is connected to the proximal end of the return air cavity and the fresh air outlet.

[0012] Furthermore, in the split-type intelligent cooling protective head cover, the cover body includes:

[0013] A cover shell, wherein the cover shell and the human head form a wearing space;

[0014] a transparent viewing window, the transparent viewing window being disposed on the front side of the housing; and

[0015] A lower hem is sealed and connected to the bottom edge of the cover shell.

[0016] Furthermore, on the split-type intelligent cooling protective head cover, the headband assembly includes:

[0017] a first arc-shaped hoop frame having a first hollow cavity and provided with the air inlet communicated with the first hollow cavity;

[0018] a second arc-shaped hoop frame, having a first hollow cavity and a second hollow cavity which are not connected to each other, and having the return air port connected to the second hollow cavity;

[0019] Two telescopic rods, which are arranged one by one between the two ends of the first arc-shaped hoop frame and the second arc-shaped hoop frame;

[0020] Two telescopic hoses, which are disposed between the two ends of the first arc-shaped hoop frame and the second arc-shaped hoop frame, and are connected with the two first hollow cavities;

[0021] a support frame, the support frame is an arc-shaped structure, and is arranged on the first arc-shaped hoop frame and / or the second arc-shaped hoop frame; and

[0022] A plurality of connectors are arranged at intervals on the side wall of the first arc-shaped hoop frame, and the connectors are detachably connected to the cover body.

[0023] Further preferably, on the split-type intelligent cooling protective head cover, the headband assembly further includes:

[0024] a hearing aid unit, the hearing aid unit being arranged at one side of the second arc-shaped hoop; and

[0025] A speech unit is arranged at the other side of the second arc-shaped hoop frame.

[0026] Furthermore, on the split-type intelligent cooling protective hood, the powered air supply assembly includes:

[0027] A box body, one side of which is provided with a fresh air inlet, the other side of which is provided with an air intake pipeline and an air return pipeline, and the air intake pipeline is provided with a second temperature and humidity sensor, and the fresh air inlet is provided with a filter unit;

[0028] a fan, the fan being disposed in the housing, the air outlet of the fan being connected to the proximal end of the air inlet pipeline, and the air inlet of the fan being connected to the proximal end of the air return pipeline and the fresh air outlet; and

[0029] A controller and a battery unit are arranged on the top of the box, and the controller is electrically connected to the first temperature and humidity sensor, the hearing aid unit and the voice unit, the fan, the second temperature and humidity sensor and the battery unit respectively.

[0030] Further preferably, the split-type intelligent cooling protective hood further includes:

[0031] A heat exchange unit is used to heat or cool the filtered clean air delivered by the fan.

[0032] Further preferably, on the split-type intelligent cooling protective hood, the heat exchange unit is a semiconductor refrigeration plate, and the semiconductor refrigeration plate is arranged in the air intake pipeline.

[0033] Further preferably, on the split-type intelligent cooling protective hood, the heat exchange unit is foam metal, the hollow cavity of the foam metal is connected to the outlet of the fan, and the foam metal is connected to the electric heating unit.

[0034] Furthermore, on the split-type intelligent cooling protective hood, the return air cavity is at least partially arranged parallel to the air inlet cavity, and the return air cavity is at least partially arranged around the air inlet cavity.

[0035] Furthermore, on the split-type intelligent cooling protective hood, the return air cavity includes a plurality of sub-cavities, and the plurality of sub-cavities are circumferentially arranged on the outside of the return air cavity with the air inlet cavity as the center.

[0036] The present invention adopts the above technical solution, which has the following technical effects compared with the prior art:

[0037] (1) The mask body and the powered air supply component are designed with a split structure, and the temperature and humidity in the mask body are monitored in real time by the first temperature and humidity sensor. The powered air supply component and the return air structure design are used to accurately control and adjust the temperature and humidity in the mask body; in particular, it is conducive to reducing the temperature in the mask body, and is suitable for wearing in a high temperature environment;

[0038] (2) By designing an air intake cavity and a return air cavity in the ventilation duct, the exhaled hot air in the positive pressure hood is partially recovered, and the heat exchange between the return air and the inlet air in the ventilation duct is realized, and the exhaled gas in the hood is exchanged with the return air and the existing heat, thereby reducing energy consumption and facilitating better temperature control;

[0039] (3) Assembling a hearing aid unit and a speech unit on the headband assembly to help users communicate with each other through the hearing aid unit and the speech unit, thereby improving the efficiency of communication and dialogue between staff members;

[0040] (4) A telescopic rod is used between the first arc-shaped hoop frame and the second arc-shaped hoop frame for adjustment, so that the size of the headband assembly can be adjusted to suit different user groups;

[0041] (5) The headband assembly and powered air supply assembly used in the split-type intelligent cooling protective hood are reusable, and the air filter unit and hood body for preventing infection can be used once or multiple times;

[0042] (6) The split-type intelligent cooling protective hood has a novel structural design, is flexible and convenient to use, and has a wide range of applications. It provides cooling and comfortable protection for outdoor medical and epidemic prevention operations in high temperatures in summer. It is especially suitable for providing better safety protection for clinical and epidemic prevention personnel working indoors and outdoors in summer. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the structure of a split-type intelligent cooling protective head cover in use state of the present invention;

[0044] Figure 2 It is a side structural schematic diagram of a headband assembly in a split-type intelligent cooling protective head cover of the present invention;

[0045] Figure 3 It is a schematic diagram of the structure of a headband assembly in a split-type intelligent cooling protective head cover of the present invention from a bottom view;

[0046] Figure 4 The present invention is a split type intelligent cooling protective head cover Figure 3 Schematic diagram of the cross-sectional structure of the AA section;

[0047] Figure 5 It is a side view structural schematic diagram of a power air supply component in a split-type intelligent cooling protective hood of the present invention;

[0048] Figure 6 This is a schematic diagram of the connection structure of a power air supply component, a ventilation duct and a headband component in a split-type intelligent cooling protective head cover of the present invention;

[0049] Figure 7 It is a schematic cross-sectional structure diagram of a ventilation duct in a split-type intelligent cooling protective hood of the present invention;

[0050] Figure 8 It is a schematic cross-sectional structure diagram of the AA section of the ventilation duct in a split-type intelligent cooling protective head cover of the present invention;

[0051] Fig. 9 It is a schematic cross-sectional structure diagram of the cross section BB of the ventilation duct in a split-type intelligent cooling protective head cover of the present invention;

[0052] Fig.10 It is a schematic cross-sectional structure diagram of the CC section of the ventilation duct in a split-type intelligent cooling protective head cover of the present invention;

[0053] Fig.11 It is a schematic cross-sectional structure diagram of the DD section of the ventilation duct in a split-type intelligent cooling protective head cover of the present invention;

[0054] Wherein, each figure is marked as:

[0055] 100-cover body, 101-cover shell, 102-transparent viewing window, 103-bottom hem;

[0056] 200-headband assembly, 201-first arc-shaped band frame, 202-second arc-shaped band frame, 203-air inlet, 204-air return port, 205-first temperature and humidity sensor, 206-telescopic rod, 207-telescopic hose, 208-hearing aid unit, 209-speech unit, 210-support frame, 211-connecting piece, 212-first hollow cavity, 213-second hollow cavity;

[0057] 300-power air supply assembly, 301-box, 302-fan, 303-air inlet pipeline, 304-air return pipeline, 305-second temperature and humidity sensor, 306-fresh air outlet, 307-filter unit, 308-controller, 309-battery unit;

[0058] 400-ventilation duct, 401-air inlet cavity, 402-return air cavity, 403-insulation layer, 404-sub-cavity;

[0059] 500-heat exchange unit, 510-semiconductor cooling sheet, 520-foam metal, 521-electric heating unit. DETAILED DESCRIPTION

[0060] The present invention is described in detail and specifically by specific examples below to provide a better understanding of the present invention, but the following examples do not limit the scope of the present invention.

[0061] See also Figure 1 As shown, this embodiment provides a split-type intelligent cooling protective head cover, including a cover body 100, a headband assembly 200 and a powered air supply assembly 300. The cover body 100 is used to be worn on the human head to protect the human mouth and nose, and prevent the inhalation of extremely fine pathogens (such as viruses) from the gaps of masks and protective glasses, thereby blocking the transmission pathways such as aerosols, thereby achieving personal protection.

[0062] The split-type intelligent cooling protective head cover provided in the present embodiment includes: a cover body 100; a headband assembly 200, which is detachably arranged inside the cover body 100, and its lower edge is provided with an air inlet 203, a return air outlet 204 and a first temperature and humidity sensor 205; a ventilation duct 400, the ventilation duct 400 has an air inlet cavity 401 and a return air cavity 402, the distal end of the air inlet cavity 401 is connected to the air inlet 203, and the distal end of the return air cavity 402 is connected to the return air outlet 204; and a powered air supply assembly 300, the air outlet of the powered air supply assembly 300 is connected to the proximal end of the air inlet cavity 401, and its air inlet is connected to the proximal end of the return air cavity 402 and the fresh air outlet 306.

[0063] The split-type intelligent cooling protective head cover provided in the present embodiment adopts a split-type structural design for the cover body 100 and the powered air supply component 300. The temperature and humidity conditions inside the cover body 100 are monitored in real time according to the first temperature and humidity sensor 205. The temperature and humidity inside the cover body 100 are precisely controlled and regulated through the powered air supply component 300 and the return air structure design, which is especially beneficial for reducing the temperature inside the cover body and is suitable for wearing in high temperature environments.

[0064] See also Figure 1 As shown, as a preferred embodiment, the cover body 100 can be fixed to the headband assembly 200 in some form, and is detachable, sterilizable, and can be used multiple times or selected for one-time use. The cover body 100 includes: a cover shell 101, the cover shell 101 forms a wearing space corresponding to the human head; a transparent visual window 102, the transparent visual window 102 is arranged at the front position of the cover shell 101; and a hem 103, the hem 103 is sealed and connected to the bottom edge of the cover shell 101. The transparent visual window 102 is large enough. By increasing the area of ​​the transparent visual window 102, the user's field of vision is expanded, which is conducive to the implementation of face recognition and other technologies on the user and increases the user's comfort.

[0065] See also Figure 3 and Figure 4As shown, as a preferred embodiment, the headband assembly 200 includes: a first arc-shaped hoop frame 201, having a first hollow cavity 212, and an air inlet 203 connected to the first hollow cavity 212 is provided thereon; a second arc-shaped hoop frame 202, having a first hollow cavity 212 and a second hollow cavity 213 that are not connected to each other, and an air return port 204 connected to the second hollow cavity 213 is provided thereon; two telescopic rods 206, which are respectively arranged between the two ends of the first arc-shaped hoop frame 201 and the second arc-shaped hoop frame 202; two telescopic hoses 207, which are respectively arranged between the two ends of the first arc-shaped hoop frame 201 and the second arc-shaped hoop frame 202, and are connected to the two first hollow cavities 212. The telescopic rods 206 make the spacing between the first arc-shaped hoop frame and the second arc-shaped hoop frame adjustable, so that the size of the headband assembly 300 can be adjusted to suit users with different head sizes.

[0066] See also Figure 2 As shown, as a preferred embodiment, the headband assembly 200 also includes: a support frame 210, the support frame 210 is an arc-shaped structure, and is arranged on the first arc-shaped hoop frame 201 and / or the second arc-shaped hoop frame 202; the connecting member 211 is detachably connected to the cover body 100. The first arc-shaped hoop frame 201 and the second arc-shaped hoop frame 202 are combined to form a ring-shaped headband structure that matches the head shape, so as to fix the headband assembly 200 on the user's head. The first arc-shaped hoop frame 201, the second arc-shaped hoop frame 202 and the support frame 210 constitute the support structure of the cover body 100; to support the support frame 210, the support frame 210 is deformable and made of a material, preferably a soft plastic material, to adapt to the adjustment between the first arc-shaped hoop frame 201 and the second arc-shaped hoop frame 202. In addition, the support frame 210 is a cross-shaped or octagonal structure design, and its overall shape is an umbrella shape to correspond to the shape of the human head.

[0067] See also Figure 2 As shown, as a preferred embodiment, the headband assembly 200 further includes a plurality of connectors 211 spaced apart on the side wall of the first arc-shaped hoop frame 201. The connectors 211 are Velcro or other detachable connectors, such as button connections, etc., so that the hood body 100 and the internal support structure of the hood can be separated for disassembly and washing.

[0068] See also Figure 2As shown, as a preferred embodiment, the headband assembly 200 also includes: a hearing aid unit 208, which is arranged on one side of the second arc-shaped hoop frame 202; and a speech unit 209, which is arranged on the other side of the second arc-shaped hoop frame 202. The speech unit 209 uses a microphone, and the hearing aid unit 208 uses a bone conduction hearing aid. By assembling a bone conduction hearing aid and a microphone on the headband assembly 200, users can communicate with each other through the bone conduction hearing aid and the microphone, thereby improving the efficiency of communication and dialogue of the staff.

[0069] See also Figure 5 As shown, as a preferred embodiment, the powered air supply assembly 300 includes: a box body 301, one side of which is provided with a fresh air inlet 306, and the other side is provided with an air intake pipeline 303 and an air return pipeline 304, and the air intake pipeline 303 is provided with a second temperature and humidity sensor 305, and the fresh air inlet 306 is provided with a filter unit 307, and the filter unit 307 is preferably made of HEPA or other high-efficiency filter materials, or materials that meet air filtration requirements, and the filter unit 307 is provided at the tail end outlet of the return air pipeline 304, so as to realize the hood body 100; a fan 302, the fan 302 is arranged in the box 301, the air outlet of the fan 302 is connected to the proximal end of the air inlet duct 303, and the air inlet is connected to the proximal end of the return air duct 304 and the fresh air outlet 306; and a controller 308 and a battery unit 309 arranged on the top of the box 301, the controller 308 is electrically connected to the first temperature and humidity sensor 205, the hearing aid unit 208 and the voice unit 209, the fan 302, the second temperature and humidity sensor 305 and the battery unit 309. The fresh air or part of the return air is transported into the cover 100 through the ventilation duct 400 by the fan 302, so as to cool the high temperature air exhaled in the cover 100.

[0070] See also Figure 5 and Figure 6 As shown, as a preferred embodiment, the split-type intelligent cooling protective hood further includes: a heat exchange unit 500, which is used to heat or cool the filtered clean air sent by the fan 302. The heat exchange unit 500 is a cooling or heating unit, which can heat or cool the gas sent by the fan 302, thereby controlling the temperature and humidity in the hood body 100, especially reducing the temperature in the hood, which is conducive to wearing in a high temperature environment.

[0071] See also Figure 5As shown, as a preferred embodiment, the heat exchange unit 500 is a semiconductor cooling sheet 510, which is arranged in the air intake pipeline 303 and is used to heat or cool the filtered clean air sent from the fan 303. The semiconductor cooling sheet 510 uses the Peltier effect of semiconductor materials. When direct current passes through a galvanic couple formed by two different semiconductor materials in series, heat can be absorbed and released at both ends of the galvanic couple respectively, thereby achieving the purpose of cooling.

[0072] See also Figure 5 As shown, as another preferred embodiment, the heat exchange unit 500 is a foam metal 520, the hollow cavity of the foam metal 520 is connected to the outlet of the fan 302, and the foam metal 520 is connected to the electric heating unit 521. The foam metal 520 is heated by the electric heating unit 521, and the heat generated by the electric heating unit 521 is transferred to the foam metal 520 by heat conduction, so as to perform efficient heat exchange on the filtered clean air flowing through the foam metal 520. The foam metal 520 and the electric heating unit 521 are both arranged inside the box 301, and the electric heating unit 521 is electrically connected to the controller 308, which is used for the controller 308 to obtain the temperature and humidity of the gas after the heat exchange through the heat exchange unit 500, and control the switch and power of the electric heating unit 521 through the controller 308 to meet the use requirements. After the heat exchange is completed in the foam metal 520, it enters the cover body 100 through the intake pipe 303.

[0073] The foam metal 520 has high specific surface area, low density and full through-hole characteristics. Specifically, the through-hole rate of the foam metal is at least 30%; the aperture of the through-hole is 0.1 mm to 2 mm, and the preferred aperture is 0.3 mm, 0.75 mm, and 1.2 mm; the specific surface area of ​​the foam metal is 2000 m 2 / m 3 ~10000m 2 / m 3 The preferred specific surface area is 3500m 2 / m 3 、4700m 2 / m 3 、5300m 2 / m 3 In addition, the foam metal can be copper, aluminum, iron, nickel or other metals, or alloys of the above metals.

[0074] The gas delivered by the fan 302 enters the interior of the heat exchange unit 500. Since the electric heating unit 521 actively heats the foam metal, the gas is fully heat-exchanged with the foam metal inside the foam metal to reach the set gas temperature, and then the gas enters the cover body 100 through the air inlet channel 401.

[0075] See also Figure 7 As shown, the ventilation duct 400 includes an air inlet cavity 401 and a return cavity 402, wherein the distal end of the air inlet cavity 401 is connected to the air inlet port 203, and the distal end of the return cavity 402 is connected to the return air port 204. In addition, the ventilation duct 400 also includes a heat preservation layer 403, which is arranged to cover the outer surface of the ventilation duct 400 to prevent the heat in the ventilation duct 400 from radiating outward.

[0076] like Figure 8 As shown, the structure of the return air cavity 402 is different at different positions of the ventilation duct 400. The return air cavity 402 is at least partially arranged parallel to the air inlet cavity 401, and the return air cavity 402 is at least partially arranged around the air inlet cavity 401. Specifically, in the ventilation duct 400 with the cover body 100, the return air cavity 402 is arranged parallel to the air inlet cavity 401, and the axis of the air inlet cavity 401 is collinear with the axis of the ventilation duct 400.

[0077] like Fig. 9 As shown, in the middle part of the ventilation duct 400, the return air cavity 402 includes a plurality of sub-channels 404, which are circumferentially arranged on the outside of the intake cavity 401 with the intake cavity 401 as the center, for increasing the contact area between the exhaled gas and the tube wall of the ventilation duct 400, thereby increasing the heat exchange efficiency between the exhaled gas and the inhaled gas, recovering the heat of the exhaled gas, and reducing the energy consumption of the powered air supply device 200. Among them, the number of the sub-channels 404 is preferably 3 to 5.

[0078] like Fig.10 As shown, in the transition part between the middle part of the ventilation duct 400 and the end part of the ventilation duct 400, the return air cavity 402 is arranged around the air inlet cavity 401. This arrangement is used to control the flow rate of the exhaled gas to improve the heat exchange efficiency between the exhaled gas and the inhaled gas in the middle part of the ventilation duct 400. For example, in the transition part of the ventilation duct 400 between the cover body 100 and the ventilation duct 400, the cross-sectional area of ​​the return air cavity 402 changes from small to large, thereby reducing the flow rate of the exhaled gas; in the transition part of the ventilation duct 400 between the powered air supply assembly 300 and the ventilation duct 400, the cross-sectional area of ​​the return air cavity 402 changes from large to small, thereby increasing the flow rate of the exhaled gas entering the powered air supply device 200, so that the exhaled gas is discharged quickly.

[0079] like Fig.11 As shown, in the ventilation duct connected to the powered air supply assembly 300 , the return air cavity 402 is arranged parallel to the air inlet cavity 401 , and the axis of the air inlet cavity 401 is colinear with the axis of the ventilation duct 400 .

[0080] By utilizing the newly designed ventilation duct 400 , the heat of the exhaled gas can be recovered while the exhaled gas is discharged, thereby reducing the energy consumption of the powered air supply device 200 .

[0081] The method of using the present invention is as follows: when the first temperature and humidity sensor 205 detects that the temperature or humidity inside the cover body 100 exceeds a preset standard, the controller 308 turns on the fan 302 to allow the external gas to enter the powered air supply device 300, the heat exchange unit 500 and the cover body 100 in turn, so that a local positive pressure slightly greater than the atmospheric pressure is formed in a part of the cover body 100, thereby reducing the user's breathing resistance; the gas exhaled by the user enters the ventilation duct 400 and the powered air supply device 300 in turn through the cover body 100, and the exhaled gas and the inhaled gas are heat exchanged in the ventilation duct heat exchange unit 500400; the controller 308 adjusts the fan 302 and the heat exchange unit 500 according to the data transmitted by the temperature and humidity sensor 205 and / or 305, controls the gear position of the fan 302, the heating power of the heat exchange unit 500 and the mixing ratio of the exhaled gas and the inhaled gas, so as to meet different usage requirements, reduce the power consumption of the powered air supply device 300, and improve the user's breathing efficiency and comfort.

[0082] The specific embodiments of the present invention are described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, the equalization changes and modifications made without departing from the spirit and scope of the present invention should be included in the scope of the present invention.

Claims

1. A split type intelligent cooling protective hood, characterized in that: include: A cover body (100); A headband assembly (200), the headband assembly (200) is detachably arranged inside the cover body (100), and an air inlet (203), an air return outlet (204) and a first temperature and humidity sensor (205) are provided at the lower edge thereof; A ventilation duct (400), the ventilation duct (400) comprising an air inlet cavity (401) and an air return cavity (402), the distal end of the air inlet cavity (401) being connected to the air inlet port (203), and the distal end of the air return cavity (402) being connected to the air return port (204); and A powered air supply component (300), wherein the outlet of the powered air supply component (300) is connected to the proximal end of the air inlet cavity (401), and the inlet of the powered air supply component (300) is connected to the proximal end of the return air cavity (402) and the fresh air outlet (306); The headband assembly (200) comprises: A first arc-shaped hoop frame (201) having a first hollow cavity (212) and provided with the air inlet (203) communicating with the first hollow cavity (212); A second arc-shaped hoop frame (202) having a first hollow cavity (212) and a second hollow cavity (213) which are not connected to each other, and having a return air port (204) connected to the second hollow cavity (213); Two telescopic rods (206) are arranged one by one between two ends of the first arc-shaped hoop frame (201) and the second arc-shaped hoop frame (202); Two telescopic hoses (207), which are arranged one by one between the two ends of the first arc-shaped hoop frame (201) and the second arc-shaped hoop frame (202), and are connected to the two first hollow cavities (212); a support frame (210), the support frame (210) being an arc-shaped structure and being arranged on the first arc-shaped hoop frame (201) and / or the second arc-shaped hoop frame (202); and A plurality of connecting pieces (211) are arranged at intervals on the side wall of the first arc-shaped hoop frame (201), and the connecting pieces (211) are detachably connected to the cover body (100); The powered air supply assembly (300) comprises: A box (301) having a fresh air inlet (306) on one side and an air intake pipeline (303) and an air return pipeline (304) on the other side, wherein a second temperature and humidity sensor (305) is arranged on the air intake pipeline (303), and a filter unit (307) is arranged at the fresh air inlet (306); a fan (302), the fan (302) being disposed in the housing (301), the outlet of the fan (302) being connected to the proximal end of the air inlet pipeline (303), and the inlet of the fan (302) being connected to the proximal end of the air return pipeline (304) and the fresh air outlet (306); and A controller (308) and a battery unit (309) are arranged on the top of the box (301), and the controller (308) is electrically connected to the first temperature and humidity sensor (205), the hearing aid unit (208) and the voice unit (209), the fan (302), the second temperature and humidity sensor (305) and the battery unit (309), respectively.

2. The split-type intelligent cooling protective head cover according to claim 1 is characterized in that: The cover body (100) comprises: A cover shell (101), wherein the cover shell (101) corresponds to a human head and forms a wearing space; a transparent viewing window (102), the transparent viewing window (102) being arranged on the front side of the cover shell (101); and A lower skirt (103), wherein the lower skirt (103) is sealed and connected to the bottom edge of the cover shell (101).

3. The split-type intelligent cooling protective head cover according to claim 1 is characterized in that: The headband assembly (200) further comprises: a hearing aid unit (208), the hearing aid unit (208) being arranged at one side of the second arc-shaped hoop frame (202); and A speech unit (209), the speech unit (209) is arranged at the other side of the second arc-shaped hoop frame (202).

4. The split-type intelligent cooling protective head cover according to claim 1 is characterized in that: Also includes: A heat exchange unit (500) is used to heat or cool the filtered clean air delivered by the fan (302).

5. The split-type intelligent cooling protective head cover according to claim 4 is characterized in that: The heat exchange unit (500) is a semiconductor cooling plate (510), and the semiconductor cooling plate (510) is arranged in the air intake pipeline (303).

6. The split type intelligent cooling protective head cover according to claim 4 is characterized in that: The heat exchange unit (500) is a foam metal (520), the hollow cavity of the foam metal (520) is in communication with the outlet of the fan (302), and the foam metal (520) is connected to an electric heating unit (521).

7. The split-type intelligent cooling protective head cover according to claim 1 is characterized in that: The return air cavity (402) is at least partially arranged parallel to the air inlet cavity (401), and the return air cavity (402) is at least partially arranged around the air inlet cavity (401).

8. The split-type intelligent cooling protective head cover according to claim 1 is characterized in that: The return air cavity (402) comprises a plurality of sub-cavities (404), and the plurality of sub-cavities (404) are circumferentially arranged on the outside of the return air cavity (402) with the air inlet cavity (401) as the center.

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