CN212817689U

CN212817689U - Hood device for biological protection

Info

Publication number: CN212817689U
Application number: CN202020468996.XU
Authority: CN
Inventors: 丁志国; 丁恩基
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2021-03-30
Anticipated expiration: 2030-04-02

Abstract

The utility model discloses a hood device for biological protection, which comprises a hood and an air filtering backpack; the front surface of the hood is provided with a window, the two sides of the hood are respectively provided with a first air inlet and a first air outlet, the first air inlet and the first air outlet are respectively provided with a check valve, and a temperature and humidity detection unit is arranged in the hood; an air inlet sterilizing bin, a diluting filtering bin, a drying bin, an air outlet sterilizing bin and a control unit are arranged in the air filtering backpack, and the air inlet sterilizing bin, the diluting filtering bin and the drying bin are communicated in sequence; the air inlet sterilizing bin is provided with a second air inlet, the drying bin is provided with an air supply connecting port, and the air outlet sterilizing bin is provided with an exhalation air connecting port and a second air outlet; the second air inlet is provided with a positive pressure air supply mechanism, the second air outlet is provided with a negative pressure exhaust mechanism, and the positive pressure air supply mechanism, the negative pressure exhaust mechanism and the temperature and humidity detection unit are respectively and electrically connected with the control unit. Can guarantee that inhaled gas and exhaled gas are all disinfected and filtered to the inside dehumidification cooling of hood.

Description

Hood device for biological protection

Technical Field

The utility model relates to a biological protective equipment field, more specifically relates to a hood device for biological protection.

Background

Along with the development of economy, the importance of biological protection is also increasing. On the one hand, some advanced industries have high requirements for the sterility of working environments, such as various biological fermentation engineering and genetic engineering. On the other hand, the threat of acute outbreak epidemic situation to economy and people's lives and properties is increasing. Protective garments, and particularly protective head coverings, are necessary to protect particular environments, or to protect people working in certain hazardous environments.

Although a general protective hood can meet the requirement, the use feeling of workers is often poor due to the closed environment, and particularly, the protective hood for virus protection has poorer air permeability due to the extremely small pathogen of protection.

Such as virulent infectious diseases, particularly infectious diseases that can be transmitted through air or contact (e.g., SARS, coronavirus, etc.) are a constant threat to human society. Because first-line rescue personnel need to directly contact with pathogens, wearing protective articles is particularly important for protecting the safety of personnel. The positive pressure protection hood is used as a breathing and contact protection article, can provide a protection factor far higher than common masks and hoods, can completely isolate personnel from a polluted environment, can provide clean flowing air for the inside through purifying ambient air, and has higher safety and comfort. However, most of the existing positive pressure protective head covers are heavy and inconvenient to wash and disinfect, have heavy burden when being worn by people and are troublesome in post-treatment, generally only have a filtering function (such as only setting a filtering layer structure formed by filtering paper and a filtering net), do not have a virus killing process, and cannot realize an omnidirectional virus protective effect.

The use of a positive pressure protective hood can effectively improve this experience. First, the existing positive pressure hood only depends on the electrostatic adsorption effect of the spray-melting cloth, has no destructive effect on pathogens, and is easy to form secondary pollution due to improper treatment; secondly, the exhaled gas is not treated, and a method of directly discharging the exhaled gas by using a check valve or directly discharging the exhaled gas by using positive pressure is generally adopted. Both of these solutions can cause disadvantages: in some application places such as bioengineering, the check valve is not suitable for direct discharge, exogenous microorganisms can be caused to contaminate a working area, the condition of infectious diseases is involved, and if a person wearing the hood is infected, the transmission cannot be inhibited; the positive pressure direct discharge often causes the humidity in the hood to be too high, which is not favorable for high-strength long-time work.

Therefore, need provide a hood device for biological protection, can disinfect respectively inhalation gas and expired gas and kill the filtration, guarantee that the personnel of wearing can inhale the fresh air that does not have the germ, does not have germicide, guarantee the gas of exhaling simultaneously and do not have the pollution to external environment, can also dehumidify the cooling to the hood internal environment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hood device for biological protection realizes disinfecting respectively inhaling gas and expired gas and filters, guarantees that the personnel of wearing can inhale the fresh air of no germ, no germicide, guarantees simultaneously that the gas of exhaling is pollution-free to the external environment, can also dehumidify the cooling to the hood internal environment.

In order to achieve the purpose, the utility model provides a hood device for biological protection, which comprises a hood and an air filtering backpack;

a window is arranged on the front face of the hood, a first air inlet and a first air outlet are respectively arranged on two sides of the hood, check valves are arranged on the first air inlet and the first air outlet, and a temperature and humidity detection unit is arranged in the hood;

an air inlet sterilizing bin, a diluting filtering bin, a drying bin, an air outlet sterilizing bin and a control unit are arranged in the air filtering backpack, and the air inlet sterilizing bin, the diluting filtering bin and the drying bin are communicated in sequence;

the air inlet sterilizing bin is provided with a second air inlet, the drying bin is provided with an air supply connecting port, the air outlet sterilizing bin is provided with an expired air connecting port and a second air outlet, the air supply connecting port is communicated with the first air inlet, and the expired air connecting port is communicated with the first air outlet;

the second air inlet is provided with a positive pressure air supply mechanism, the second air outlet is provided with a negative pressure exhaust mechanism, and the positive pressure air supply mechanism, the negative pressure exhaust mechanism and the temperature and humidity detection unit are respectively and electrically connected with the control unit;

the control unit is used for controlling the positive pressure air supply mechanism and/or the negative pressure exhaust mechanism to work according to the temperature value and the temperature value detected by the temperature and humidity detection unit so as to enable the temperature and the temperature in the hood to reach a preset range.

Optionally, still be equipped with in the hood and talkback module, orientation module, electric quantity and long warning module of duration of use, talkback module the orientation module electric quantity and long warning module of duration of use respectively with the control unit electricity is connected.

Optionally, a three-way valve is arranged at the first air inlet, the three-way valve has three ports, two of the ports are respectively communicated with the first air inlet and the first hose, and the other port is a reserved interface for atomization and oxygen therapy.

Optionally, the second air inlet is provided with a micro-molecular sieve.

Optionally, a disinfecting and killing filter agent is arranged in the air inlet disinfecting and killing bin and the air outlet disinfecting and killing bin, and a drying agent is arranged in the drying bin; the sterilizing and filtering unit is a sterilizing and filtering sheet or a sterilizing and filtering device filled with a sterilizing and filtering agent, and the sterilizing and filtering sheet or the sterilizing and filtering device is detachably connected with the air inlet sterilizing bin and the air outlet sterilizing bin.

Optionally, a diluent with a preset liquid level is arranged in the diluting and filtering bin, a guide pipe is arranged in the diluting and filtering bin, one end of the guide pipe is communicated with the air inlet sterilizing and disinfecting bin, and the other end of the guide pipe is inserted into the position below the liquid level in the diluting and filtering bin to a preset depth.

Optionally, the air supply connection port is communicated with the first air inlet through a first hose, and the exhaled air inlet is communicated with the first air outlet through a second hose.

Optionally, the window is formed by a protective lens, the surface of which is coated with an anti-fog coating.

Optionally, the front face of the hood is further provided with an emergency ventilation window, and the emergency ventilation window is formed by a high-density antibacterial filter screen.

Optionally, a general power module and a positive and negative voltage special power module are further arranged in the air filtration backpack, and the control unit, the temperature and humidity detection unit, the intercom module, the positioning module and the electric quantity and use duration reminding module are respectively and electrically connected with the general power module; the positive pressure air supply mechanism, the negative pressure exhaust mechanism and the control unit are respectively electrically connected with the positive and negative pressure special power supply module.

The beneficial effects of the utility model reside in that:

the first air inlet and the first air outlet on two sides of the head cover are respectively provided with the check valve, the first air inlet is communicated with the air inlet sterilizing bin, the diluting and filtering bin and the drying bin, and the first air outlet is communicated with the air outlet sterilizing bin to form an inhaled and exhaled gas loop, so that gas circulation in the head cover can be ensured, inhaled gas and exhaled gas can be sterilized and filtered, and the exhaled gas cannot pollute the external environment; the bactericide in the gas can be removed through the diluent in the dilution filtering bin, and the gas enters the head cover after being dried by the drying bin, so that the absolute cleanness of the sucked gas is ensured; meanwhile, based on the monitoring value of the temperature and humidity detection unit in the hood, the positive pressure air supply mechanism and/or the negative pressure exhaust mechanism are controlled to work, air flow is formed in the hood, the interior of the hood is dehumidified and cooled, the temperature and the temperature in the hood can be guaranteed to reach a preset range, and a wearer feels more comfortable.

The apparatus of the present invention has other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention with reference to the attached drawings, in which like reference numerals generally represent like parts.

Fig. 1 shows a schematic view of a headgear assembly for biological protection according to an embodiment of the present invention.

Fig. 2 shows a schematic view of the internal structure of an air filtration backpack according to one embodiment of the present invention.

Description of reference numerals:

1. a head cover; 2. an air filtration backpack; 3. a control unit; 101. a window; 102, and (b); a first air inlet; 103. a first air outlet; 104. an intercom module; 105. a key area; 106. a second hose; 107. A first hose; 108. a three-way valve; 201. a drying bin; 202. a dilution filtering bin; 203. an air inlet sterilizing bin; 204. a gas outlet sterilizing bin; 205. a second air inlet; 206. an air supply connector; 207. an exhalation gas connector; 208. a second air outlet; 209. a universal power supply module; 210. the positive and negative voltage special power supply module.

Detailed Description

The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The head cover device for biological protection comprises a head cover 1 and an air filtering backpack 2;

a window 101 is arranged on the front surface of the hood 1, a first air inlet 102 and a first air outlet 103 are respectively arranged on two sides of the hood 1, check valves are respectively arranged on the air inlet and the air outlet, and a temperature and humidity detection unit is arranged in the hood 1;

an air inlet sterilizing bin 203, a diluting and filtering bin 202, a drying bin 201, an air outlet sterilizing bin 204 and a control unit 3 are arranged in the air filtering backpack 2, and the air inlet sterilizing bin 203, the diluting and filtering bin 202 and the drying bin 201 are communicated in sequence;

the air inlet sterilizing bin 203 is provided with a second air inlet 205, the drying bin 201 is provided with an air supply connecting port 206, the air outlet sterilizing bin 204 is provided with an exhaled air connecting port 207 and a second air outlet 208, the air supply connecting port 206 is communicated with the first air inlet 102, and the exhaled air connecting port 207 is communicated with the first air outlet 103;

the second air inlet 205 is provided with a positive pressure air supply mechanism (not shown), the second air outlet 208 is provided with a negative pressure air exhaust mechanism (not shown), and the positive pressure air supply mechanism, the negative pressure air exhaust mechanism and the temperature and humidity detection unit are respectively and electrically connected with the control unit 3;

the control unit 3 is used for controlling the positive pressure air supply mechanism and/or the negative pressure exhaust mechanism to work according to the temperature value and the temperature value detected by the temperature and humidity detection unit so as to enable the temperature and the temperature in the hood 1 to reach the preset range.

Specifically, the first air inlet 102 and the first air outlet 103 on the two sides of the hood 1 are respectively provided with a check valve, so that one-way conduction can be realized, the first air inlet 102, the drying bin 201, the diluting and filtering bin 202 and the air inlet sterilizing bin 203 are sequentially communicated, the first air outlet 103 is communicated with the air outlet sterilizing bin 204, a suction and exhalation air loop is formed, and air circulation in the hood 1 can be ensured. Because the exhaled gas only needs to be sterilized and does not relate to the inhalation of a human body, a single gas-out sterilization cabin 204 can be adopted, the inhaled gas needs to be sterilized and also needs to consider the harm of the inhaled gas and the problem of gas humidity in a closed environment, and therefore a dilution filtering cabin 202 and a drying cabin 201 need to be added after the gas-in sterilization cabin 203, the inhaled gas and the exhaled gas can be sterilized and filtered, and the exhaled gas cannot pollute the external environment; the bactericide in the gas can be removed through the diluent in the dilution filter bin 202, and then the gas enters the hood 1 after being dried through the drying bin 201, so that the absolute cleanness of the sucked gas is ensured; meanwhile, based on the monitoring value of the temperature and humidity detection unit in the hood 1, the positive pressure air supply mechanism and/or the negative pressure exhaust mechanism are controlled to work, air flow can be formed in the hood 1, so that the interior of the hood 1 can be dehumidified and cooled, the temperature and the temperature in the hood 1 can be guaranteed to reach a preset range, the interior of the hood 1 are prevented from being too high in temperature and humidity, and a wearer is enabled to be more comfortable. The hood 1 in this embodiment may further include a cape and a hook and loop fastener. Meanwhile, in this embodiment, a plurality of layers of filter screens may be combined at the positions of the inlet air sterilizing bin 203, the drying bin 201, the outlet air sterilizing bin 204, the second air inlet 205, the air supply connecting port 206, the exhaled air connecting port 207, the second air outlet 208, and the like, and the filter screens may be filter screens of N95 standard.

Furthermore, the positive pressure air supply mechanism is responsible for introducing fresh air into the mask, and the negative pressure exhaust mechanism is responsible for extracting gas in the mask, and is mainly used for dehumidifying and cooling. The control unit 3 adjusts the pressure difference of positive pressure and negative pressure according to the temperature and humidity detected by the temperature and humidity detection unit, thereby improving the environment in the mask and facilitating the long-term work of people.

In the specific implementation process, the air inlet and outlet filtering modes can be adjusted according to the actual situation. For example, the filtering may be performed by filtering the inlet gas alone, filtering the outlet gas alone, or filtering both the inlet gas and the outlet gas. The sterilizing and filtering agents in the inlet sterilizing chamber 203 and the outlet sterilizing chamber 204 can be preset before wearing. While oxygen may also be supplied at the first inlet 102 in a mixed oxygen port.

The positive pressure air supply mechanism and the negative pressure air exhaust mechanism in this embodiment are two air pumps respectively connected to the second air inlet 205 and the second air outlet 208, the air inlets pressurize, the air outlets pump air, and the power of the two air pumps is controlled by the control unit 3. The two air pumps can be controlled to work independently or simultaneously according to the temperature and the humidity in the head cover when in use, so that the temperature and the temperature in the head cover 1 reach preset ranges.

In one example, the head cover 1 is further provided with an intercom module 104, a positioning module, and an electric quantity and use duration reminding module, wherein the intercom module 104, the positioning module, the electric quantity and use duration reminding module are respectively electrically connected with the control unit 3, controlled by the control unit and powered by the universal control module 209.

Specifically, the intercom module 104 may be disposed in the hood 1, such as an existing intercom device, and communicate with a switchboard or other staff by using an intercom system and performing intercom connection through voice; the control unit 3 can also integrate a power management function to manage the power, and the power consumption and use duration reminding module can be used for carrying out early warning on the power consumption according to the preset lead, monitoring the use duration and reminding the failure of the sterilizing and filtering agent in the inlet air sterilizing and killing bin 203 or the outlet air sterilizing and killing bin 204 according to the preset duration; a positioning module (such as a GPS module) can be further arranged, the position of a person wearing the device can be displayed in real time through a positioning function, and the positioning function is particularly important for the operation outside a chemical place, emergency personnel and the like. In the specific implementation process, a central control console can be established, the central control console is provided with central control software, and the central control software can integrate an intercom system and a positioning system and is in communication connection with the hood. The remote talkback function of the staff wearing the hood is realized through the talkback system, the staff can receive the unified command and scheduling of the central console, and the position and the state of the front-end staff are displayed through the positioning system. A key area 105 can be arranged outside the head cap 1 and used for operating the talkback module 104 to answer and page, and controlling the electric quantity and the use duration to remind the module of voice or stop vibrating and the like.

In one example, a three-way valve 108 is disposed at the first gas inlet 102, the three-way valve 108 has three ports, two of the ports are respectively communicated with the first gas inlet 102 and the first hose 107, and the other port is reserved for an atomizing and oxygen transferring interface.

Specifically, the air inlet is left with a three-way valve 108 to facilitate oxygen delivery and drug atomization for the user in an emergency. During use, the three-way valve 108 can be connected with a standby oxygen bag or a small oxygen bottle to provide additional oxygen supply for mobile use in an oxygen-deficient environment.

Specifically, the provision of the micro-molecular filter net in the second air inlet 205 can filter out suspended substances such as large particles of dust in the outside air when the outside air enters the air filter backpack 2.

In one example, the inlet air sterilizing compartment 203 and the outlet air sterilizing compartment 204 are provided with sterilizing and filtering agents, and the drying compartment 201 is provided with drying agents. The sterilizing and filtering unit is a sterilizing and filtering sheet or a sterilizing and filtering device filled with a sterilizing and filtering agent, and the sterilizing and filtering sheet or the sterilizing and filtering device is detachably connected with the air inlet sterilizing and disinfecting bin and the air outlet sterilizing and disinfecting bin.

The sterilizing filter unit in the embodiment adopts a sterilizing filter sheet capable of sterilizing or a sterilizing filter filled with sterilizing filter agent for convenient replacement, and the type of the sterilizing filter sheet and the type of the sterilizing agent can be selected according to the actual use environment. Meanwhile, the sterilizing filter sheet in the air outlet sterilizing bin 204 can prevent harmful pathogens from being exhaled, and zero pollution to the external environment is realized. In the specific implementation process, a plurality of slots capable of accommodating the inserting and pulling of the sterilizing and killing filter sheets can be arranged in the air inlet sterilizing and killing bin 203 and the air outlet sterilizing and killing bin 204, or the air inlet sterilizing and killing bin 203 and the air outlet sterilizing and killing bin 204 are arranged to be in movable extraction type structures such as slots integrally matched with a sterilizing and killing filter, so that the air inlet sterilizing and killing bin and the air outlet sterilizing and killing bin can be conveniently replaced when the sterilizing and killing effect is poor. Meanwhile, in other fields (such as chemical field and the like), the sterilizing filter can be made by replacing different disinfectant according to application scenes.

In one example, a predetermined level of diluent is disposed in the diluting filter chamber 202, a conduit is disposed in the diluting filter chamber 202, one end of the conduit is communicated with the air-intake sterilizing chamber 203, and the other end of the conduit is inserted to a predetermined depth below the liquid level in the diluting filter chamber 202.

Specifically, the diluting filter bin 202 is used for removing bactericide in gas, and for convenience in replacement, the diluting filter bin 202 is provided with a liquid inlet hole and a liquid outlet hole, and the liquid outlet hole is arranged below the diluting filter bin, so that diluent can be replaced conveniently; the drying chamber 201 is replaced in an integrated manner, a drying agent is arranged in the drying chamber, and the air path design of the air inlet loop must ensure that the inhaled air can enter the respirator through the drying agent. The diluent can be selected from different diluents according to specific use scenes, and the diluent needs to be capable of diluting and dissolving the substances harmful to human bodies such as bactericides in the external air environment.

In one example, the gas supply connection port 206 communicates with the first gas inlet 102 through the first hose 107, and the exhalation gas inlet communicates with the first gas outlet 103 through the second hose 106.

Specifically, the air supply connection port 206 and the exhaled air connection port of the air filtering backpack 2 are respectively communicated with the first air inlet 102 and the first air outlet 103 of the hood 1 through the first hose 107 and the second hose 106, and the hoses are not easy to damage and are convenient for the wearer to move.

In one example, window 101 is formed from a protective lens, the surface of which is coated with an anti-fog coating.

Specifically, the hood 1 is integrated with a window 101 formed by a protective lens, and the protective lens is provided with an anti-fog coating, so that water fog can be prevented from being suddenly generated in the cold air environment due to expiration, and the visual line of a wearer is prevented from being influenced.

In one example, the front face of the hood 1 is also provided with an emergency ventilation window formed by a high density antimicrobial filter screen.

Specifically, set up the emergent ventilative window that the antibiotic filter screen of high density formed on hood 1, can guarantee when the device lacks the electricity or abnormal work, can just can satisfy basic breathing demand by only relying on hood 1 itself, avoid taking place danger. Under the normal operating condition of the air filtering backpack 2, because the air permeability of the high-density antibacterial filter screen is relatively poor, the air circulation inside the hood 1 can not pass through the emergency ventilation window.

In one example, a general power module 209 and a positive and negative voltage special power module 210 are further arranged in the air filtration backpack 2, and the control unit 3, the temperature and humidity detection unit, the intercom module 104, the positioning module and the electric quantity and use duration reminding module are respectively and electrically connected with the general power module 209; the positive pressure air supply mechanism and the negative pressure air exhaust mechanism are electrically connected to the positive and negative pressure dedicated power module 210, respectively.

Specifically, because of the control unit 3, temperature and humidity detecting unit, the module 104 of talkbacking, orientation module and electric quantity and the long intelligent system who reminds the module formation during use power consumption very little, and the power consumption of malleation mechanism of supplying gas and negative pressure exhaust mechanism is great, in order to avoid intelligent system and positive negative pressure system each other not to influence simultaneously, preferably adopt two independent power supply schemes of each other in this scheme.

The universal power module 209 in this embodiment is a replaceable rechargeable battery, has an independent charging interface, and can be charged by using an external power source or taken down for charging. The working continuity of the intelligent system can be effectively ensured. The relevant electrical connections between the hood 1 and the air filtration backpack 2 may be made by means of a combination cable connection.

In one embodiment, referring to fig. 2, a dedicated battery compartment may be reserved in the air filtration backpack 2, and the positive/negative voltage dedicated power module 210 may be disposed in the dedicated battery compartment to supply power to the positive/negative voltage mechanism and be monitored by the control unit 3.

In another embodiment, referring to fig. 1, if the space design of the air filtration backpack 2 is small, the positive/negative pressure dedicated power module 210 may be designed to be connected to the sterilization chamber by a cable in the form of an external mobile power source, and is monitored by the control unit 3 while supplying power to the positive/negative pressure mechanism, and the positive pressure air supply mechanism and the negative pressure air exhaust mechanism need to be provided with independent replaceable mobile power sources and power interfaces; the positive and negative voltage special power module 210 is connected with the air filtration backpack 2, on one hand, provides power for positive and negative voltage, and on the other hand, receives the control unit 3 to monitor electric quantity.

To sum up, the device of the utility model for the hood 1 for biological protection can ensure that both the inhaled gas and the exhaled gas can be disinfected and filtered, ensure that the exhaled gas can not pollute the external environment, can remove the bactericide in the gas through the dilution filter chamber 202, and then enter the hood 1 after being dried through the drying chamber 201, thus ensuring the absolute cleanness of the inhaled gas; meanwhile, the positive pressure air supply mechanism and/or the negative pressure exhaust mechanism are controlled to work based on the monitoring value of the temperature and humidity detection unit in the hood 1, so that the interior of the hood 1 can be dehumidified and cooled, and a wearer can comfortably use the hood for a long time.

While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A head cover device for biological protection is characterized by comprising a head cover and an air filtering backpack;

the control unit is used for controlling the positive pressure air supply mechanism/or the negative pressure exhaust mechanism to work according to the temperature value and the temperature value detected by the temperature and humidity detection unit so as to enable the temperature and the temperature in the hood to reach the preset range.

2. The hood device for biological protection according to claim 1, wherein an intercom module, a positioning module, an electric quantity and use duration reminding module are further arranged in the hood, and the intercom module, the positioning module, the electric quantity and use duration reminding module are respectively and electrically connected with the control unit.

3. The headgear assembly of claim 1, wherein the first air inlet is provided with a three-way valve having three ports, two of the three ports respectively communicating with the first air inlet and the first hose, and the other port being reserved for an atomizing and oxygen delivering port.

4. Hood device for biological protection, according to claim 1, characterised in that said second air inlet is provided with a micro-molecular sieve.

5. The hood device for biological protection according to claim 1, wherein a sterilizing and filtering unit is provided in the inlet sterilizing chamber and the outlet sterilizing chamber, and a drying agent is provided in the drying chamber;

the sterilizing and filtering unit is a sterilizing and filtering sheet or a sterilizing and filtering device filled with a sterilizing and filtering agent, and the sterilizing and filtering sheet or the sterilizing and filtering device is detachably connected with the air inlet sterilizing bin and the air outlet sterilizing bin.

6. The hood device for biological protection according to claim 1, wherein a predetermined level of diluent is disposed in the dilution filter chamber, a conduit is disposed in the dilution filter chamber, one end of the conduit is communicated with the air intake sterilizing chamber, and the other end of the conduit is inserted to a predetermined depth below the liquid level in the dilution filter chamber.

7. The hood device for biological protection according to claim 1, wherein the air supply connection port communicates with the first air inlet port through a first hose, and the exhalation air connection port communicates with the first air outlet port through a second hose.

8. The headgear assembly for biological protection according to claim 1, wherein the window is formed by a protective lens, the protective lens surface being coated with an anti-fog coating.

9. The hood device for biological protection according to claim 1, wherein the hood front face is further provided with an emergency ventilation window formed by a high density antimicrobial filter screen.

10. The hood device for biological protection according to claim 2, wherein a general power module and a positive and negative pressure special power module are further arranged in the air filtration backpack, and the control unit, the temperature and humidity detection unit, the intercom module, the positioning module and the electric quantity and use duration reminding module are respectively and electrically connected with the general power module; the positive pressure air supply mechanism, the negative pressure exhaust mechanism and the control unit are respectively electrically connected with the positive and negative pressure special power supply module.