Protective hood

Abstract

The invention discloses a protective hood which comprises a hood shell, a visual window is arranged on the hood shell, a lower hem is arranged at the edge of the bottom of the hood shell, a head hoop assembly is detachably arranged in the hood shell, an air return mechanism is rotationally arranged on the side face of the head hoop assembly, an air inlet hose is arranged on the head hoop assembly, and the head hoop assembly is connected with a temperature control mechanism through the air inlet hose. An air return hose is arranged on the air return mechanism, and the air return mechanism is connected with the drying mechanism through the air return hose; the temperature control mechanism comprises a shell, an air outlet, a fresh air opening, a fixing frame, a semiconductor chilling plate, a cooling fan blade, a hot end, a cold end, a driving motor, a rotating rod, a partition plate and a first fan. The temperature control mechanism can heat or cool air entering the head cover through cooperation of the semiconductor chilling plate, the first draught fan and the partition plate, the drying mechanism can process air exhaled by a user, the second draught fan sucks the exhaled air near the respirator into the drying box through the air return hose, and water vapor is removed.

Description

Technical Field

[0001] The invention relates to the technical field of personal protective equipment, in particular to a protective head cover. Background Art

[0002] In order to prevent the spread of airborne diseases, relevant positive pressure hoods have been developed in the existing technology, such as powered air-purifying respirators, which use positive pressure to deliver clean air into the hood, forming a positive pressure inside the hood, which can effectively block the transmission routes of aerosols of fine pathogens and achieve personal protection.

[0003] Existing protective hoods such as the one with application number CN202010613729.1, entitled "A Split-Type Intelligent Cooling Protective Hood", comprise: a hood body; a headband assembly, which is detachably arranged inside the hood body, and whose lower edge is provided with an air inlet, a return air outlet, and a first temperature and humidity sensor; a ventilation duct, which has 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 outlet; 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 return air cavity and the fresh air outlet. The split-type intelligent cooling protective hood provided by the present invention adopts a split 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 return air structure design. It is suitable for wearing and use in high-temperature environments, and is particularly suitable for providing better safety protection for clinical and epidemic prevention personnel working indoors and outdoors in summer.

[0004] Although the above-mentioned protective hood can cool down the internal environment, when the temperature of the protective hood rises, the above-mentioned protective hood cannot regulate the internal environment in a timely manner.

[0005] Therefore, a protective hood is proposed to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a protective head cover to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a protective head cover, comprising a cover shell, a visual window provided on the cover shell, a hem provided at the bottom edge of the cover shell, a headband assembly detachably provided inside the cover shell, an air return mechanism provided on the side of the headband assembly for rotation, an air inlet hose provided on the headband assembly, the headband assembly being connected to a temperature control mechanism via the air inlet hose, a return air hose provided on the return air mechanism, and the return air mechanism being connected to a drying mechanism via the return air hose;

[0008] The temperature control mechanism includes a shell, an air outlet, a fresh air outlet, a fixing frame, a semiconductor refrigeration plate, a heat dissipation fan, a hot end, a cold end, a driving motor, a rotating rod, a partition plate and a fan;

[0009] The shell is provided with an air outlet, the air outlet is connected to the air inlet hose, a fresh air outlet is provided at one end of the shell away from the air outlet, a fixing frame is provided at the center position inside the shell, and a semiconductor refrigeration chip is provided inside the fixing frame;

[0010] The hot end and the cold end of the semiconductor refrigeration chip are respectively connected to the heat dissipation fan fin, the heat dissipation fan fin is located inside the fixed frame, and the hot end and the cold end are located on both sides of the fixed frame;

[0011] The fan 1 is arranged at one end of the shell body near the fresh air inlet, the rotating rod is rotatably connected to the inner wall of the shell body, and is located between the fixed frame and the fan 1. A partition plate is provided on the outer periphery of the rotating rod. The rotating rod passes through the shell body, and a driving motor is provided at one end extending to the outside of the shell body.

[0012] Preferably, the headband assembly includes an arc-shaped hoop frame 1, an arc-shaped hoop frame 2, a telescopic rod, a telescopic hose, a support frame, an air inlet interface, a fixing frame and a connecting piece;

[0013] A plurality of connecting pieces are arranged at intervals on the side walls of the arc-shaped hoop frame 1, and the arc-shaped hoop frame 1 is detachably connected to the cover shell through the connecting pieces. An air inlet channel is provided inside the arc-shaped hoop frame 2, and an air inlet is provided on the upper surface of the arc-shaped hoop frame 2. The air inlet passes through the upper surface of the arc-shaped hoop frame 2 and is connected to the air inlet channel. Two telescopic rods are arranged one by one between the two ends of the arc-shaped hoop frame 1 and the arc-shaped hoop frame 2, and two telescopic hoses are arranged one by one between the two ends of the arc-shaped hoop frame 1 and the arc-shaped hoop frame 2. The support frame has an arc-shaped structure and is arranged on the arc-shaped hoop frame 1 and the arc-shaped hoop frame 2. The air inlet interface is arranged on the arc-shaped hoop frame 2 and is connected to the air inlet hose. A fixing frame is provided at the bottom of the air inlet interface. The return air hose passes through the fixing frame and is fixed to the arc-shaped hoop frame 2 by the fixing frame.

[0014] Preferably, the air return mechanism includes a breathing hood, an air return duct connector, a damping shaft, a connecting frame and a connecting rod;

[0015] One end of the connecting rod is rotatably set on the outside of the arc-shaped hoop frame 2, and the other end of the connecting rod is rotatably set on the connecting frame. One end of the damping shaft is set on the connecting frame, and the other end of the damping shaft is set on the breathing hood. The connecting frame and the breathing hood move relative to each other through the damping shaft. One end of the return air duct connector is set on the connection port of the breathing hood, and the other end of the return air duct connector is connected to the return air hose.

[0016] Preferably, the drying mechanism includes a drying box, a second fan and a connecting pipe;

[0017] The drying box is arranged on the lower surface of the shell, the air inlet end of the drying box is connected to the return air hose, and the air outlet end of the drying box is provided with a second fan. One end of the connecting pipe is arranged on the drying box, and the other end of the connecting pipe is connected to the shell and is located on the shell near the fresh air outlet.

[0018] Preferably, the contact end of the partition plate and the inner wall of the shell is chamfered so that the contact end of the partition plate and the inner wall of the shell fits with the inner wall of the shell.

[0019] Preferably, the air intake volume of fan 1 is greater than the air intake volume of fan 2.

[0020] Preferably, a controller and a battery unit are provided on the shell, the controller is electrically connected to the battery unit, fan 1, fan 2, and drive motor respectively, and the battery unit is electrically connected to fan 1, fan 2, drive motor and semiconductor refrigeration plate respectively.

[0021] Preferably, a temperature and humidity sensor is provided on the arc-shaped hoop frame 1, and the temperature and humidity sensor is electrically connected to the controller.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The temperature control mechanism heats or cools the air entering the hood through the cooperation of a semiconductor cooling plate, a fan, and a partition plate. The temperature and humidity sensor monitors the internal environment in real time. When the temperature needs to be adjusted, it sends a signal to the controller, which drives the partition plate to rotate, automatically switching the contact path between the air and the hot end or cold end of the semiconductor cooling plate, achieving automatic temperature regulation without frequent manual operation.

[0024] 2. The drying mechanism can process the gas exhaled by the user. The second fan draws the exhaled gas near the breathing mask into the drying box through the return air hose. After removing the water vapor, it is sent back to the temperature control mechanism through the connecting pipe to mix with fresh air, and then re-enters the interior of the hood for recycling, reducing the internal humidity accumulation and keeping the environment inside the hood dry and comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the headband assembly and the air return mechanism of the present invention;

[0027] Figure 3 Schematic diagram of the top view of the headband mechanism of the present invention;

[0028] Figure 4 Schematic diagram of the cross-sectional structure of the headband mechanism of the present invention;

[0029] Figure 5It is a structural schematic diagram of the temperature control mechanism and the drying mechanism of the present invention;

[0030] Figure 6 It is a schematic cross-sectional view of the temperature control mechanism and the drying mechanism of the present invention;

[0031] Figure 7 It is a schematic diagram of the explosion structure of the temperature control mechanism of the present invention.

[0032] In the figure: 1. Cover; 2. Headband assembly; 3. Return air mechanism; 4. Temperature control mechanism; 5. Drying mechanism; 6. Controller; 7. Battery unit; 8. Temperature and humidity sensor;

[0033] 11. Visual window; 12. Hem;

[0034] 21. Arc-shaped hoop frame 1; 211. Telescopic rod; 212. Telescopic hose; 22. Arc-shaped hoop frame 2; 221. Air inlet channel; 222. Air inlet; 2221. Air inlet hose; 223. Air inlet interface; 23. Support frame; 24. Fixing frame; 25. Connector;

[0035] 31. Breathing mask; 311. Return air duct connector; 3111. Return air hose; 312. Damping shaft; 3121. Connecting frame; 3122. Connecting rod;

[0036] 41. Housing; 411. Air outlet; 412. Fresh air outlet; 42. Fixing frame; 43. Semiconductor cooling fin; 431. Heat dissipation fan; 432. Hot end; 433. Cold end; 44. Driving motor; 441. Rotating rod; 442. Partition plate; 45. Fan 1;

[0037] 51. Drying box; 511. Fan 2; 52. Connecting pipe. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figures 1 to 7 The present invention provides an embodiment: a protective head cover, comprising a cover shell 1, a visual window 11 is provided on the cover shell 1, and a hem 12 is provided at the bottom edge of the cover shell 1.

[0040] The headband assembly 2 is detachably provided inside the housing 1. The side of the headband assembly 2 is provided with an air return mechanism 3. The headband assembly 2 is provided with an air inlet hose 2221. The headband assembly 2 is connected to the temperature control mechanism 4 through the air inlet hose 2221. The air return mechanism 3 is provided with a return air hose 3111. The return air mechanism 3 is connected to the drying mechanism 5 through the return air hose 3111.

[0041] The temperature control mechanism 4 includes a housing 41, an air outlet 411, a fresh air outlet 412, a fixing frame 42, a semiconductor refrigeration chip 43, a heat dissipation fan 431, a hot end 432, a cold end 433, a drive motor 44, a rotating rod 441, a partition plate 442 and a fan 45;

[0042] The housing 41 is provided with an air outlet 411, which is connected to the air inlet hose 2221. A fresh air outlet 412 is provided at one end of the housing 41 away from the air outlet 411. A fixing frame 42 is provided at the center of the interior of the housing 41, and a semiconductor cooling plate 43 is provided inside the fixing frame 42.

[0043] The hot end 432 and the cold end 433 of the semiconductor refrigeration chip 43 are respectively connected to the heat dissipation fan 431, and the heat dissipation fan 431 is located inside the fixed frame 42. The heat dissipation fan 431 is located inside the fixed frame 42, and the hot end 432 and the cold end 433 are located on both sides of the fixed frame 42;

[0044] Fan 1 45 is arranged at one end of the shell 41 near the fresh air inlet 412, and the rotating rod 441 is rotatably connected to the inner wall of the shell 41 and is located between the fixed frame 42 and the fan 1 45. A partition plate 442 is provided on the outer periphery of the rotating rod 441. The rotating rod 441 passes through the shell 41 and is provided with a drive motor 44 at one end extending to the outside of the shell 41.

[0045] The temperature control mechanism 4 heats or cools the incoming outside air, thereby regulating the internal temperature of the protective hood. Outside air is drawn into the housing 41 through the fresh air inlet 412 by the fan 45. To prevent pathogens or bacteria in the outside air from entering the interior of the protective hood, a filter unit (not shown) is provided at the fresh air inlet 412, isolating bacteria or viruses in the outside air from the outside of the protective hood. The outside air enters the interior of the housing 41 under the action of the fan 45 and continues to flow deeper into the housing 41 under the propulsion of the fan 45.

[0046] When the temperature and humidity sensor 8 detects that the interior of the protective hood needs to be cooled, the temperature and humidity sensor 8 sends a cooling signal to the controller 6 through an electrical connection. After receiving the cooling signal, the controller 6 controls the drive motor 44 to operate. The drive motor 44 drives the rotating rod 441 to rotate. The rotation of the rotating rod 441 drives the partition plate 442 to rotate until the partition plate 442 rotates to the side of the inner wall of the shell 41 near the hot end 432. At this time, the partition plate 442 blocks the path of the outside air contacting the hot end 432. Under the drive of the fan 45, the outside air can only pass through the path contacting the cold end 433. When the outside air passes through the path contacting the cold end 433, its own temperature is reduced. At this time, the cooled outside air enters the air inlet interface 223 through the air inlet hose 2221, and then flows in the air inlet channel 221 until it enters the interior of the protective hood through the air inlet 222, thereby completing the cooling of the internal environment of the protective hood.

[0047] When the temperature and humidity sensor 8 detects that the interior of the protective hood needs to be heated, the temperature and humidity sensor 8 sends a heating signal to the controller 6 through an electrical connection. After receiving the heating signal, the controller 6 controls the drive motor 44 to operate. The drive motor 44 drives the rotating rod 441 to rotate. The rotation of the rotating rod 441 drives the partition plate 442 to rotate until the partition plate 442 rotates to the side of the inner wall of the shell 41 near the cold end 433. At this time, the partition plate 442 blocks the path of the outside air contacting the cold end 433. Under the drive of the fan 45, the outside air can only pass through the path contacting the hot end 432. When the outside air passes through the path contacting the hot end 432, its own temperature increases. At this time, the heated outside air enters the air inlet interface 223 through the air inlet hose 2221, and then flows in the air inlet channel 221 until it enters the interior of the protective hood through the air inlet 222, thereby completing the heating of the internal environment of the protective hood.

[0048] Temperature and humidity sensor 8 can use a DHT22 temperature and humidity sensor. The DHT22 (also often referred to as the AM2302, which is the industrial-grade version of the DHT22 with the same performance) is a digital temperature and humidity sensor widely used in temperature and humidity detection scenarios. Produced by Aosong, it is known for its high cost performance and good stability.

[0049] Controller 6 can use KWN-2

[0050] This temperature and humidity controller utilizes imported high-precision sensors and microprocessor technology to simultaneously measure temperature and humidity, automatically activating heating, ventilation, and other functions based on set thresholds. It supports independent temperature and humidity measurement and coordinated control. Featuring industrial-grade components and a protective design, it can withstand harsh environments. Its affordable price makes it suitable for small to medium-sized environmental control needs.

[0051] Specifically, the headband assembly 2 includes an arc-shaped hoop frame 1 21, an arc-shaped hoop frame 22, a telescopic rod 211, a telescopic hose 212, a support frame 23, an air inlet interface 223, a fixing frame 24 and a connecting piece 25;

[0052] A plurality of connecting members 25 are provided at intervals on the side walls of the arc-shaped hoop frame 1 21. The arc-shaped hoop frame 1 21 is detachably connected to the cover 1 through the connecting member 25. An air inlet channel 221 is provided inside the arc-shaped hoop frame 22. An air inlet 222 is provided on the upper surface of the arc-shaped hoop frame 22. The air inlet 222 passes through the upper surface of the arc-shaped hoop frame 22 and is connected to the air inlet channel 221. Two telescopic rods 211 are provided on both sides of the arc-shaped hoop frame 1 21 and the arc-shaped hoop frame 22. The two telescopic hoses 212 are arranged one by one between the two ends of the arc hoop frame 1 21 and the arc hoop frame 2 22. The support frame 23 is an arc-shaped structure and is arranged on the arc hoop frame 1 21 and the arc hoop frame 2 22. The air inlet interface 223 is arranged on the arc hoop frame 2 22 and is connected to the air inlet hose 2221. A fixing frame 24 is provided at the bottom of the air inlet interface 223. The return air hose 3111 passes through the fixing frame 24 and is fixed to the arc hoop frame 2 22 by the fixing frame 24.

[0053] The user can adjust the distance between the arc-shaped hoop frame 1 21 and the arc-shaped hoop frame 2 22 by adjusting the telescopic rod 211 and the telescopic hose 212 to adapt to users with different head sizes. The headband assembly 2 is detachably connected to the cover shell 1 through the connector 25, and the connector 3121 can be specifically a Velcro or other detachable connector 25, such as a button connection. The outside air entering the air inlet interface 223 through the air inlet hose 2221 will flow in the air inlet channel 221 and diffuse toward both sides of the air inlet channel 221. The outside air diffused in the air inlet channel 221 will enter the interior of the protective hood through the air inlet interface 223, and the internal environment of the protective hood will be temperature-regulated (heated up or cooled down). In order to prevent the heated or cooled air flowing in the air inlet channel 221 from affecting the user's wearing, an insulating layer (not shown in the figure) is set between the user and the arc-shaped hoop frame 22 to isolate the user's head from the arc-shaped hoop frame 22, thereby preventing the temperature change of the air inlet channel 221 in the arc-shaped hoop frame 22 from having an adverse effect on the user.

[0054] The support structure of the cover 1 is composed of an arc-shaped hoop frame 1 21 , an arc-shaped hoop frame 2 22 and a support frame 23 ; the support frame 23 is supported, and the support frame 23 is made of a deformable material, preferably a soft plastic material, to adapt to the adjustment between the arc-shaped hoop frame 1 21 and the arc-shaped hoop frame 2 22 .

[0055] The fixing frame 24 is used to fix the return air hose 3111 to the arc-shaped hoop frame 22 to prevent the return air hose 3111 from causing obstruction to the user when the user is working.

[0056] Specifically, the air return mechanism 3 includes a breathing hood 31, an air return duct connector 311, a damping shaft 312, a connecting frame 3121 and a connecting rod 3122;

[0057] One end of the connecting rod 3122 is rotatably set on the outside of the arc-shaped hoop frame 22, and the other end of the connecting rod 3122 is rotatably set on the connecting frame 3121. One end of the damping shaft 312 is set on the connecting frame 3121, and the other end of the damping shaft 312 is set on the breathing hood 31. The connecting frame 3121 and the breathing hood 31 move relative to each other through the damping shaft 312. One end of the return air duct connector 311 is set on the connection port of the breathing hood 31, and the other end of the return air duct connector 311 is connected to the return air hose 3111.

[0058] The return air mechanism 3 can secure the respirator 31 to the user's mouth and nose through the rotational coordination of the connecting rod 3122, the connecting frame 3121, and the damping shaft 312. When the second blower 511 in the drying mechanism 5 starts working, the second blower 511 can extract the gas ejected from the user's mouth and nose, preventing the gas exhaled by the user from diffusing into the protective hood, thereby affecting the humidity inside the protective hood. The connectors 25 between the connecting rod 3122 and the second arc-shaped hoop frame 22, and between the connecting rod 3122 and the connecting frame 3121 also use parts with built-in damping functions, so that the connecting rod 3122, the connecting frame 3121, and the second arc-shaped hoop frame 22 can maintain a stable shape, making it convenient for the user to wear.

[0059] The position of the respirator 31 should be controlled by the connecting rod 3122, the connecting frame 3121, and the damping shaft 312, so as to be as close to the user's mouth and nose as possible without hindering the user's use, thereby reducing the escape of exhaled air from the user's mouth and nose. Therefore, the respirator 31 should also be selected to have a shape that fits the user's mouth and nose.

[0060] Specifically, the drying mechanism 5 includes a drying box 51, a second fan 511 and a connecting pipe 52;

[0061] The drying box 51 is arranged on the lower surface of the shell 41. The air inlet end of the drying box 51 is connected to the return air hose 3111. The air outlet end of the drying box 51 is provided with a fan 2 511. One end of the connecting pipe 52 is provided on the drying box 51, and the other end of the connecting pipe 52 is connected to the shell 41 and is located on the shell 41 at one end near the fresh air outlet 412.

[0062] The drying mechanism 5 is used to dry out moisture from the user's exhaled air and recirculate the air back into the protective hood via a connecting pipe 52 connected to the housing 41, replenishing the air inside the protective hood. Blower 2 511 extracts air accumulated in front of the respirator 31 via a return hose 3111 and returns the dried air to the housing 41 via the connecting pipe 52, participating in a secondary circulation.

[0063] Specifically, the contact end of the partition plate 442 with the inner wall of the housing 41 is chamfered so that the contact end of the partition plate 442 and the inner wall of the housing 41 is in contact with the inner wall of the housing 41. The chamfering of the contact end of the partition plate 442 with the inner wall of the housing 41 is intended to minimize the amount of outside air that passes through the gap between the partition plate 442 and the inner wall of the housing 41, thereby reducing the interference of this outside air with the temperature control inside the protective hood.

[0064] Specifically, the air intake of fan 1 45 is greater than the air intake of fan 2 511. Because the protective hood is a positive pressure type, it is required to form a positive pressure inside the protective hood to prevent viruses or bacteria from entering the protective hood. Therefore, the amount of outside air blown in by fan 1 45 is required to be greater than the amount drawn out of the protective hood by fan 2 511 to maintain the positive pressure inside the protective hood.

[0065] Specifically, the housing 41 is provided with a controller 6 and a battery unit 7. The controller 6 is electrically connected to the battery unit 7, fan 1 45, fan 2 511, and drive motor 44, respectively. The battery unit 7 is electrically connected to fan 1 45, fan 2 511, drive motor 44, and semiconductor cooling plate 43, respectively. The user can control the opening and closing of fan 1 45 and fan 2 511 through the controller 6. When the temperature and humidity sensor 8 senses that the temperature inside the protective hood needs to be regulated, the temperature and humidity sensor 8 sends an electrical signal to the controller 6. After receiving the electrical signal transmitted by the temperature and humidity sensor 8, the controller 6 controls the drive motor 44 to adjust the state of the partition plate 442 via the rotating rod 441, thereby achieving the purpose of regulating the ambient temperature inside the protective hood. The battery unit 7 provides energy support for fan 1 45, fan 2 511, drive motor 44, and semiconductor cooling plate 43.

[0066] Specifically, a temperature and humidity sensor 8 is provided on the arc-shaped hoop frame 1 21, and the temperature and humidity sensor 8 is electrically connected to the controller 6. The temperature and humidity sensor 8 is used to monitor the temperature changes of the air environment inside the protective hood. When the temperature of the air environment inside the protective hood is high or low, the temperature and humidity sensor 8 will send an electrical signal to the controller 6.

[0067] Working principle:

[0068] When the user wants to wear the protective head cover, loosen the telescopic rod 211 and the telescopic hose 212 at both ends of the arc-shaped hoop frame 1 21 and the arc-shaped hoop frame 2 22, adjust the spacing according to the size of the head, and the telescopic hose 212 will be synchronously extended and retracted with the telescopic rod 211 to ensure the stability of the structure. After adjustment, tighten the telescopic rod 211 to fix it. The support frame 23 is made of soft plastic. The arc-shaped hoop frame 1 21 of the headband assembly 2 is detachably connected to the cover shell 1 through the side wall connector 25. Just align the connector 25 and press it to fix it. Rotate the connecting rod 3122 and the connecting frame 3121, and adjust the angle of the breathing mask 31 through the damping shaft 312 so that it is as close to the mouth and nose as possible without affecting the field of vision and movement. After adjustment, the damping structure will automatically maintain a stable position.

[0069] Before use, the user should confirm that the air inlet hose 2221 and the air return hose 3111 are securely fixed by the fixing bracket 24 to prevent the air inlet hose 2221 and the air return hose 3111 from shaking and interfering with the operation.

[0070] The user presses the power button of the controller 6 on the housing 41 of the temperature control mechanism 4, and the battery unit 7 supplies power to each component. At this time, the fan 1 45 and the fan 2 511 are started by default, and a positive pressure environment begins to form inside the hood.

[0071] The temperature and humidity sensor 8 on the arc-shaped headband frame 21 monitors the internal environment in real time:

[0072] If cooling is required: the sensor sends a signal to the controller 6, and the driving motor 44 drives the partition plate 442 to rotate, blocking the contact between the air and the hot end 432 of the semiconductor refrigeration plate 43. After the air is cooled at the cold end 433, it enters the interior of the hood through the air inlet hose 2221, the air inlet channel 221 of the arc-shaped hoop frame 22, and the air inlet 222.

[0073] If the temperature needs to be increased: the partition plate 442 rotates to block the cold end 433, and the air is heated by the hot end 432 and enters the hood to complete the temperature increase. The mode can also be manually switched through the controller 6 to meet individual needs.

[0074] When the user wears it, the fan 2 511 extracts the exhaled gas near the breathing mask 31 through the return air hose 3111, removes the water vapor through the drying box 51, and then returns it to the shell 41 of the temperature control mechanism 4 through the connecting pipe 52. After mixing with fresh air, it re-enters the head mask, realizing gas recycling and reducing internal humidity accumulation.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A protective head cover, comprising a cover shell (1), wherein the cover shell (1) is provided with a viewing window (11), and a hem (12) is provided at the bottom edge of the cover shell (1), characterized in that: The invention comprises a temperature control mechanism (4) and a drying mechanism (5); a detachable headband assembly (2) is provided inside the housing (1); the headband assembly (2) and the temperature control mechanism (4) can achieve gas circulation through an air inlet hose (2221); a return air mechanism (3) is provided on the side of the headband assembly (2); the return air mechanism (3) and the drying mechanism (5) can achieve gas drying through the return air hose (3111); The temperature control mechanism (4) includes a housing (41), an air outlet (411), a fresh air outlet (412), a fixing frame (42), a semiconductor cooling fin (43), a heat dissipation fan (431), a hot end (432), a cold end (433), a driving motor (44), a rotating rod (441), a partition plate (442) and a fan (45); The shell (41) is provided with an air outlet (411), the air outlet (411) is connected to the air inlet hose (2221), a fresh air outlet (412) is provided at one end of the shell (41) away from the air outlet (411), a fixing frame (42) is provided at the center position inside the shell (41), and a semiconductor cooling plate (43) is provided inside the fixing frame (42); The hot end (432) and the cold end (433) of the semiconductor refrigeration plate (43) are respectively connected to the heat dissipation fan (431), the heat dissipation fan (431) is located inside the fixed frame (42), and the hot end (432) and the cold end (433) are located on both sides of the fixed frame (42); The fan 1 (45) is arranged at one end of the interior of the shell (41) near the fresh air inlet (412); the rotating rod (441) is rotatably connected to the inner wall of the shell (41) and is located between the fixed frame (42) and the fan 1 (45); a partition plate (442) is provided on the outer periphery of the rotating rod (441); the rotating rod (441) passes through the shell (41) and is provided with a driving motor (44) at one end extending to the outside of the shell (41).

2. The protective head cover according to claim 1, characterized in that: The headband assembly (2) comprises an arc-shaped hoop frame 1 (21), an arc-shaped hoop frame 2 (22), a telescopic rod (211), a telescopic hose (212), a support frame (23), an air inlet interface (223), a fixing frame (24) and a connecting piece (25); A plurality of connecting pieces (25) are arranged at intervals on the side wall of the arc-shaped hoop frame 1 (21), and the arc-shaped hoop frame 1 (21) is detachably connected to the cover shell (1) through the connecting piece (25). An air inlet channel (221) is provided inside the arc-shaped hoop frame 2 (22), and an air inlet (222) is provided on the upper surface of the arc-shaped hoop frame 2 (22). The air inlet (222) passes through the upper surface of the arc-shaped hoop frame 2 (22) and is connected to the air inlet channel (221). Two telescopic rods (211) are arranged one by one on the arc-shaped hoop frame 1 (21) and the arc-shaped hoop frame 2 (22). Between the two ends, two telescopic hoses (212) are arranged one by one between the two ends of the arc hoop frame 1 (21) and the arc hoop frame 2 (22); the support frame (23) is in an arc-shaped structure and is arranged on the arc hoop frame 1 (21) and the arc hoop frame 2 (22); the air inlet interface (223) is arranged on the arc hoop frame 2 (22) and is connected to the air inlet hose (2221); a fixing frame (24) is arranged at the bottom of the air inlet interface (223); the return air hose (3111) passes through the fixing frame (24) and is fixed to the arc hoop frame 2 (22) by the fixing frame (24).

3. The protective head cover according to claim 1, characterized in that: The air return mechanism (3) comprises a breathing hood (31), an air return duct connector (311), a damping shaft (312), a connecting frame (3121) and a connecting rod (3122); One end of the connecting rod (3122) is rotatably arranged on the outside of the second arc-shaped hoop frame (22), and the other end of the connecting rod (3122) is rotatably arranged with a connecting frame (3121). One end of the damping rotating shaft (312) is arranged on the connecting frame (3121), and the other end of the damping rotating shaft (312) is arranged on the breathing hood (31). The connecting frame (3121) and the breathing hood (31) move relative to each other through the damping rotating shaft (312). One end of the return air duct connector (311) is arranged on the connection port of the breathing hood (31), and the other end of the return air duct connector (311) is connected to the return air hose (3111).

4. The protective head cover according to claim 1, characterized in that: The drying mechanism (5) includes a drying box (51), a second fan (511) and a connecting pipe (52); The drying box (51) is arranged on the lower surface of the housing (41), the air inlet end of the drying box (51) is connected to the return air hose (3111), and the air outlet end of the drying box (51) is provided with a second fan (511). One end of the connecting pipe (52) is arranged on the drying box (51), and the other end of the connecting pipe (52) is connected to the housing (41) and is located on the housing (41) at one end close to the fresh air outlet (412).

5. The protective head cover according to claim 1, characterized in that: The contact end of the partition plate (442) and the inner wall of the shell (41) is chamfered so that the contact end of the partition plate (442) and the inner wall of the shell (41) fits the inner wall of the shell (41).

6. The protective head cover according to claim 4, characterized in that: The air intake volume of the fan 1 (45) is greater than the air intake volume of the fan 2 (511).

7. The protective head cover according to claim 4, characterized in that: The housing (41) is provided with a controller (6) and a battery unit (7). The controller (6) is electrically connected to the battery unit (7), the first fan (45), the second fan (511), and the drive motor (44), respectively. The battery unit (7) is electrically connected to the first fan (45), the second fan (511), the drive motor (44), and the semiconductor refrigeration plate (43), respectively.

8. The protective head cover according to claim 1, characterized in that: A temperature and humidity sensor (8) is provided on the arc-shaped hoop frame (21), and the temperature and humidity sensor (8) is electrically connected to the controller (6).

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