Head-mounted air supply device

Abstract

The utility model discloses a head-mounted air supply device, and relates to the technical field of air purification equipment. Comprising an air supply cap body, the air supply cap body can be worn on the head of a user and is provided with a cap brim, and a ventilation cavity is formed in the middle and provided with a second air inlet and a second air outlet; the second air inlet is connected with a clean air source; the second air outlet is located in the lower side of the hat brim and comprises a plurality of air supply holes and permeation air supply pieces, the air supply holes are located in the outer side of the hat brim and distributed at intervals in the circumferential direction of the hat brim, and the permeation air supply pieces are located on the inner sides of the air supply holes. According to the head-mounted air supply device, external polluted air can be effectively isolated, it is guaranteed that clean air stably covers the mouth and nose area of a user, the head-mounted air supply device is suitable for being worn when people move, the air supply cap body is a soft cap, the air supply cap body is made of air-tight fiber fabric except for the air outlet of the brim, and the air supply cap body is convenient to use. The wearing comfort can be improved, and the light and convenient characteristics are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification equipment, in particular to a head-mounted air supply device. Background Art

[0002] In social production, some industrial plants, hospitals, sanitation operations, mining production and other places emit a large amount of dust, inhalable particulate matter, pathogenic microorganisms, VOC (volatile organic compounds) volatiles, chemical gas molecules, etc. The concentration of pollutants is high. The labor health protection of people working in such places needs to be given special attention.

[0003] Currently, workers in these environments often wear masks to reduce the harm caused by inhaling harmful substances. However, masks primarily rely on the mask surface to filter air, while air flow is entirely powered by the lungs. Conventional medical surgical masks are relatively thin, not only poorly filtering small particles but also allowing a significant amount of air to leak into the respiratory tract before purification. Medical protective masks are also too thick, creating significant breathing resistance. Wearing them for extended periods can easily cause breathing difficulties, making them difficult to maintain for extended periods and unsuitable for labor-intensive work. Therefore, wearing masks cannot effectively address the issue of breathing purified air in these workplaces.

[0004] In response to this, head-mounted air supply devices have emerged. Existing head-mounted respirators mostly rely on a power unit to provide air delivery power. After the air is filtered through a filter, it is delivered to the user's breathing area through a breathing tube and the head-mounted respirator. While these devices can deliver clean air to the user's breathing area, the clean airflow they deliver has a limited coverage area. During light activity, the clean airflow cannot stably cover the mouth and nose, making them unsuitable for active wear. Utility Model Content

[0005] In response to the technical problem that the existing head-mounted air supply device has a small clean air flow coverage range and is not suitable for people to wear during activities, the utility model provides a head-mounted air supply device that can effectively isolate external polluted air and form a stable positive pressure area to ensure that clean air stably covers the user's mouth and nose area, and is suitable for people to wear during activities.

[0006] The utility model is achieved through the following technical solutions:

[0007] The utility model provides a head-mounted air supply device, comprising an air supply cap body, which can be worn on the user's head and is provided with a brim; a ventilation cavity is provided in the middle of the air supply cap body, and the ventilation cavity is adapted to be equipped with a second air inlet and a second air outlet; the second air inlet is used to connect to a clean air source; the second air outlet is located on the lower side of the brim, and the second air outlet includes a plurality of air supply holes and an infiltration air supply component, a plurality of the air supply holes are located on the outside of the brim, and the plurality of the air supply holes are arranged at intervals along the circumference of the brim, and the infiltration air supply component is located on the inner side of the air supply holes.

[0008] The head-mounted air supply device provided by the utility model includes an air supply cap body, the air supply cap body is provided with a brim, a ventilation cavity is provided in the middle, and the air outlet of the ventilation cavity includes a plurality of air supply holes and an infiltration air supply member, the plurality of air supply holes are located on the outside of the brim and are arranged at intervals along the circumference of the brim, and the infiltration air supply member is located on the inside of the air supply hole. When in use, the air inlet of the ventilation cavity of the air supply cap body is connected to a clean air source to input a clean air flow through the clean air source, and the air supply cap body is worn on the head with the brim located in front of the forehead, while the clean air flow is discharged from the air supply holes and the infiltration air supply member at the same time, which can ensure that the air supply device has a sufficient air supply air flow range, does not block the user's mouth and nose, does not increase the resistance to exhalation and inhalation, and does not cause discomfort caused by blowing. The head-mounted air supply device is suitable for wearing during activities.

[0009] Among them, the air flow is sent out from the ventilation cavity of the air supply cap body, which can stabilize the air supply pressure; at the same time, the air flow output through the air supply hole has a high flow rate, and the air supply holes are located on the outside of the brim and arranged at intervals along the circumference of the brim, so that the clean air flow ejected therefrom forms an air curtain, which can block pollutants from invading the breathing zone, and the infiltration air supply part has a certain air supply resistance, and the air flow velocity it delivers is relatively low, and it is located on the inside of the air supply hole, which can deliver the air flow evenly and at low speed to the front of the person's face and form a stable positive pressure area, thereby ensuring that the clean air stably covers the mouth and nose area. At the same time, the lower wind speed makes the eyes, mouth and nose more comfortable, and reduces the feeling of blowing.

[0010] In addition, the head-mounted air supply device provided by the present invention forms an air curtain through which the clean air flow outputted from the air supply hole blocks pollutants from invading the breathing zone. There is no need to set up a transparent closed mask, and there is no fogging problem of the transparent closed mask.

[0011] In an optional embodiment of the present application, the air supply cap body is a soft cap to improve wearing comfort and lightness.

[0012] In an optional embodiment of the present application, the air supply cap is adapted to be equipped with a neck strap to facilitate fixing the air supply cap to the user's head.

[0013] In an optional embodiment of the present application, an air purifier is further included, wherein an air intake cavity is provided in the middle of the air purifier, and the air intake cavity is adapted to have a first air inlet and a first air outlet, the first air outlet is connected to the second air inlet, and the first air inlet is adapted to have a filter assembly so as to facilitate the direct input of a clean air source through the air purifier to the air supply cap body.

[0014] In an optional embodiment of the present application, the filter assembly includes a first filter element and a third filter element. Along the air inlet direction, the third filter element is located on the rear side of the first filter element, and the filtration level of the third filter element is greater than that of the first filter element to ensure that the filter assembly has sufficient filtration capacity and life.

[0015] In an optional embodiment of the present application, a second filter element is further provided between the first filter element and the third filter element. The second filter element is an activated carbon filter element, which adsorbs organic volatiles and chemical gaseous pollutants through the activated carbon filter element. It can be used in places where VOC organic volatiles, chemical gaseous pollutants, etc. are superimposed.

[0016] In an optional embodiment of the present application, the air purifier is further provided with a fan, which can inhale air from the first air inlet and discharge it from the first air outlet, so as to provide an air pressure head through the fan, and does not require an external air source, thereby facilitating personnel movement and operation.

[0017] In an optional embodiment of the present application, a rechargeable battery is further included, and the rechargeable battery is electrically connected to the fan to facilitate direct supply of electrical energy to the fan, thereby further improving the convenience of moving the air supply device.

[0018] In an optional embodiment of the present application, the air purifier is equipped with a waist strap to facilitate fixing the air purifier to the user's waist, further improving the convenience of personnel movement.

[0019] In an optional embodiment of the present application, the first air outlet is connected to the second air inlet via a bellows, so as to achieve a flexible connection between the air supply cap body and the air purifier.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] 1. The head-mounted air supply device provided by the utility model includes an air supply cap body, which is provided with a brim and a ventilation cavity in the middle, and the air outlet of the ventilation cavity includes multiple air supply holes and a penetration air supply member. The multiple air supply holes are located on the outside of the brim, and the penetration air supply member is located on the inside of the air supply holes, so that clean air is discharged from the air supply holes and the penetration air supply member at the same time, which can ensure that the air supply device has a sufficient air supply airflow range, does not need to block the user's mouth and nose, does not increase the resistance to exhalation and inhalation, and is suitable for wearing when people are active.

[0022] 2. The head-mounted air supply device provided by the present invention has air flow delivered from the ventilation cavity of the air supply cap body, which can stabilize the air supply pressure; at the same time, the air flow output through the air supply hole has a high flow rate, and the air supply hole is located on the outside of the brim of the cap, which can prevent pollutants from invading the breathing zone, while the infiltration air supply part has a certain air supply resistance, and the air flow rate it delivers is relatively low, and it is located on the inside of the air supply hole, which can deliver the air flow evenly and at a low speed to the front of the person's face and form a stable positive pressure area, thereby ensuring that clean air stably covers the mouth and nose area. At the same time, the lower wind speed makes the eyes, mouth and nose more comfortable and reduces the feeling of blowing.

[0023] 3. The head-mounted air supply device provided by the utility model forms an air curtain through which the clean air flow outputted from the air supply hole blocks pollutants from invading the breathing zone. There is no need to set up a transparent closed mask, and there is no fogging problem of the transparent closed mask.

[0024] 4. The head-mounted air supply device provided by the present invention has an air supply cap body which is a soft cap. Except for the air outlet at the brim, the cap body is made of airtight fiber fabric, which can improve the wearing comfort and has the characteristics of lightness.

[0025] 5. The head-mounted air supply device provided by the utility model has an air supply cap body which is a soft cap. It shrinks naturally when not in use and is easy to carry. Under positive air pressure, it can form a stable cavity to accommodate clean air for stable air supply. It can also be used in combination with work caps such as safety helmets. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] In the attached figure:

[0028] Figure 1 This is a schematic diagram of the assembly of the head-mounted air supply device according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of the working principle of the air supply cap body according to an embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the assembly of an air purifier according to an embodiment of the present utility model;

[0031] Figure 4 This is a side view schematic diagram of an air purifier according to an embodiment of the present utility model;

[0032] Figure 5 This is a schematic diagram of the use of the wearable air supply device according to an embodiment of the present utility model.

[0033] Markings and corresponding parts names in the accompanying drawings:

[0034] 1-air purifier, 2-air supply cap, 3-first air inlet, 4-first air outlet, 5-second air inlet, 6-second air outlet, 7-speed control switch, 8-fan, 9-rechargeable battery, 10-neck strap, 11-waist strap, 12-air supply hole, 13-infiltration air supply part, 14-first filter element, 15-second filter element, 16-third filter element. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0037] In the description of the embodiments of the present application, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0038] In the description of this utility model, unless otherwise specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0039] Example 1

[0040] Combine Figure 1 and Figure 2, this embodiment provides a head-mounted air supply device, including an air supply cap body 2, which can be worn on the user's head, and the air supply cap body 2 is provided with a brim; a ventilation cavity is provided in the middle of the air supply cap body 2, and the ventilation cavity is adapted to be equipped with a second air inlet 5 and a second air outlet 6; the second air inlet 5 is used to connect to a clean air source; the second air outlet 6 is located on the lower side of the brim, and the second air outlet 6 includes a plurality of air supply holes 12 and an infiltration air supply part 13, the plurality of air supply holes 12 are located on the outside of the brim, and the plurality of air supply holes 12 are arranged at intervals along the circumference of the brim, and the infiltration air supply part 13 is located on the inner side of the air supply holes 12.

[0041] It can be understood that the ventilation cavity in the middle of the air supply cap body 2 serves as an air duct to connect the second air inlet 5 with the second air outlet 6 .

[0042] In this embodiment, the air supply cap body 2 is a soft cap to improve wearing comfort and portability. At the same time, it can also be used in combination with an existing work cap, which is convenient and comfortable to wear.

[0043] Specifically, the air supply cap body 2 is constructed from a non-air-permeable fiber material, creating a soft, cap-shaped air duct cavity for air supply. This cavity is balanced with the brim for a stable fit. Fiber materials are lightweight, durable, hygienic, and environmentally friendly, and are currently commonly used in bag-type air ducts. During use, purified air fills the fiber duct cavity, forming a static pressure chamber that facilitates stable air delivery from the second air outlet 6. Alternatively, the cap body 2 can be made of flexible plastic or rubber.

[0044] Generally speaking, the air supply cap body 2 is adapted to be equipped with a neck strap 10 so as to fix the air supply cap body 2 on the user's head, thereby preventing the air supply cap body 2 from falling off when the person's head moves a lot and the amplitude of the movement is large, thereby meeting the requirements of stable wearing and stable air supply covering the mouth and nose.

[0045] Air holes 12 are through-holes located on the underside of the brim. Their diameter is determined by the specific air supply pressure. In this embodiment, the air holes 12 are small, evenly distributed mesh holes along the outer edge of the brim, with a diameter of 2 mm. Typically, the diameter of the air holes 12 is 2-4 mm and is typically cut using a laser punch.

[0046] The infiltration air supply member 13 has a certain wind resistance to reduce the air supply speed. It can be a porous part such as sponge, or can be made of fiber material with air permeability.

[0047] In summary, the head-mounted air supply device provided in this embodiment includes an air supply cap body 2, the air supply cap body 2 is provided with a brim and a ventilation cavity in the middle, and the air outlet of the ventilation cavity includes a plurality of air supply holes 12 and an infiltration air supply component 13, the plurality of air supply holes 12 are located on the outside of the brim and are arranged at intervals along the circumference of the brim, and the infiltration air supply component 13 is located on the inside of the air supply hole 12.

[0048] Combine Figure 2 When in use, the air inlet of the ventilation cavity of the air supply cap body 2 is connected to the clean air source to input clean airflow through the clean air source. At the same time, the air supply cap body 2 is worn on the head with the brim located in front of the forehead, and the clean airflow is discharged from the air supply hole 12 and the infiltration air supply member 13 at the same time, which can ensure that the air supply device has a sufficient air supply airflow range, does not need to block the user's mouth and nose, does not increase the resistance to exhalation and inhalation, and is suitable for wearing when people are active.

[0049] Among them, the air flow is sent out from the ventilation cavity of the air supply cap body 2, which can stabilize the air supply pressure; at the same time, the air flow velocity output through the air supply hole 12 is relatively high, and the air supply hole 12 is located on the outside of the brim and is arranged at intervals along the circumference of the brim, so that the clean air flow ejected therefrom forms an air curtain, which can block pollutants from invading the breathing zone, and the infiltration air supply part 13 has a certain air supply resistance, and the air flow velocity it delivers is relatively low, and it is located on the inside of the air supply hole 12, which can deliver the air flow evenly and at low speed to the front of the person's face, and form a stable positive pressure area, thereby ensuring that the clean air stably covers the mouth and nose area, and at the same time, the lower wind speed makes the eyes, mouth and nose more comfortable, and reduces the feeling of blowing.

[0050] In addition, the head-mounted air supply device provided in this embodiment forms an air curtain through which the clean air flow outputted from the air supply hole 12 blocks pollutants from invading the breathing zone. There is no need to set up a transparent closed mask, and there is no fogging problem of the transparent closed mask.

[0051] Example 2

[0052] Combine Figure 1 and Figure 3 This embodiment provides a head-mounted air supply device. Based on embodiment 1, this embodiment also includes an air purifier 1. An air intake cavity is provided in the middle of the air purifier 1. The air intake cavity is adapted to be equipped with a first air inlet 3 and a first air outlet 4. The first air outlet 4 is connected to the second air inlet 5, and the first air inlet 3 is adapted to be equipped with a filter assembly so as to directly input a clean air source into the air supply cap body 2 through the air purifier 1.

[0053] It can be understood that the air purifier 1 provided in this embodiment is provided with an air intake cavity, which has a large dust holding capacity, and can reduce the cost of use by reducing the frequency of filter element replacement, and can be adapted to different purification scenarios by matching filter element configurations of different materials. When a high-efficiency filter (HEPA) filter element is used, it can be used to strengthen the protection of medical staff in the diagnosis and treatment area during an epidemic. At the same time, in this embodiment, the structural design of the air purifier 1 greatly increases the windward area of ​​the filter, and the wind speed on its windward surface is about 0.3m / s, which greatly reduces the resistance of the air purifier 1, saves fan energy consumption, reduces fan noise, and increases the dust holding capacity of the air purifier 1, thereby extending the service life of the air purifier 1.

[0054] Combine Figure 3 and Figure 4 The filter assembly includes a first filter element 14 and a third filter element 16. The third filter element 16 is located behind the first filter element 14 in the air inlet direction. The third filter element 16 has a higher filtration rating than the first filter element 14, ensuring sufficient filtration capacity and lifespan. Generally speaking, the first filter element 14 is a coarse-efficiency filter element, while the third filter element 16 is one of medium-efficiency, high-efficiency, and sub-high-efficiency.

[0055] It should be noted that air filter elements are mainly divided into coarse, medium, high, sub-high, high, and ultra-high efficiency levels (GB / T 14295-2019, GB / T 13554-2020). Specifically, coarse filters are divided into four levels: C1, C2, C3, and C4. They are made of materials such as glass fiber, synthetic fiber, filter cotton, and metal mesh to capture particles larger than 5μm and various suspended matter. Medium-efficiency filters are divided into three levels: Z1, Z2, and Z3. They are made of non-woven fabric or glass fiber materials to capture particles 1-5μm and various suspended matter. High-efficiency filters are GZ, sub-high efficiency filters are YG, and high-efficiency filters are G. They are divided into three categories according to filtration efficiency: 35, 40, and 45. Ultra-high efficiency filters are CG, and they are divided into six categories according to filtration efficiency: 50, 55, 60, 65, 70, and 75.

[0056] On this basis, a second filter element 15 is further provided between the first filter element 14 and the third filter element 16. The second filter element 15 is an activated carbon filter element, which can adsorb organic volatiles and chemical gaseous pollutants through the activated carbon filter element. It can be used in places where VOC organic volatiles, chemical gaseous pollutants, etc. are superimposed.

[0057] Generally speaking, an air inlet plate is further provided at the first air inlet 3 to filter out large-sized debris through the air inlet plate, such as an air inlet plate with a 50% permeability.

[0058] In this embodiment, the first air outlet 4 and the second air inlet 5 have the same specifications and are connected to a corrugated air supply hose via a snap-on quick-release connector. The diameter of the corrugated hose is approximately DN50. In other words, the first air outlet 4 is connected to the second air inlet 5 via the corrugated hose, thereby achieving a flexible connection between the air supply cap body 2 and the air purifier 1.

[0059] It should be understood that the air purifier 1 is also provided with a fan 8, which can inhale air from the first air inlet 3 and discharge it from the first air outlet 4, so as to provide an air pressure head through the fan 8, and does not require an external air source, which is convenient for personnel to move and operate.

[0060] Generally speaking, the fan 8 is a centrifugal fan. In this embodiment, the fan 8 adopts a low-noise, high-pressure head, small air volume (about 50m 3 / h), centrifugal fan driven by a brushless DC motor.

[0061] This embodiment also includes a rechargeable battery 9, which is electrically connected to the fan 8 to directly provide power to the fan 8, further improving the portability of the air supply device. Typically, the capacity of the rechargeable battery 9 is designed to provide at least 12 hours of continuous air supply. When the battery is depleted, it can be recharged or replaced via the charging port.

[0062] In addition, in actual use, a gas flow meter or other instrument and sensor capable of measuring wind speed is provided at the first air outlet 4 to measure the wind speed at the first air outlet 4. At the same time, a control circuit is provided, and the gas flow meter and the fan 8 are both electrically connected to the control circuit to adjust the rotation speed of the fan 8 according to the data of the wind speed sensor at the first air outlet 4, thereby maintaining a stable air volume. In addition, a speed regulating switch 7 (mostly a five-stage speed regulator) can be provided on the control circuit to control the rotation speed of the fan 8 through the speed regulating switch 7, so that the practical personnel can adjust the air supply volume according to their own needs, and can make the rotation speed of the fan 8 adapt to the change of the air purifier 1 from the initial resistance to the final resistance, thereby avoiding a reduction in air volume due to an increase in the resistance of the air purifier 1.

[0063] Combine Figure 4 and Figure 5 The air purifier 1 is equipped with a waist buckle 11 to facilitate fixing the air purifier 1 on the user's waist, further improving the convenience of personnel movement.

[0064] In summary, the head-mounted air supply device provided in this embodiment inputs a clean air source to the air supply cap body 2 through the air purifier 1, without the need for an external air source, and provides power to the fan 8 through the rechargeable battery 9, without the need for an external power source, which is convenient for personnel to move around and work.

[0065] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A head-mounted air supply device, characterized in that: It comprises an air supply cap body (2), the air supply cap body (2) can be worn on the head of a user, and the air supply cap body (2) is provided with a brim; A ventilation cavity is provided in the middle of the air supply cap body (2), and the ventilation cavity is adapted to be equipped with a second air inlet (5) and a second air outlet (6); The second air inlet (5) is used for connecting to a clean air source; The second air outlet (6) is located at the lower side of the brim, and the second air outlet (6) includes a plurality of air supply holes (12) and a permeable air supply member (13); The plurality of air supply holes (12) are located on the outside of the brim, and the plurality of air supply holes (12) are spaced apart along the circumference of the brim, and the infiltration air supply member (13) is located on the inside of the air supply hole (12).

2. The head-mounted air supply device according to claim 1, characterized in that: The air supply cap body (2) is a soft cap.

3. The head-mounted air supply device according to claim 1, wherein: The air supply cap body (2) is adapted to be equipped with a neck buckle (10).

4. The head-mounted air supply device according to claim 1, wherein: The invention also includes an air purifier (1), wherein an air intake cavity is provided in the middle of the air purifier (1), the air intake cavity is adapted to be equipped with a first air inlet (3) and a first air outlet (4), the first air outlet (4) is connected to the second air inlet (5), and the first air inlet (3) is adapted to be equipped with a filter assembly.

5. The head-mounted air supply device according to claim 4, characterized in that: The filter assembly comprises a first filter element (14) and a third filter element (16). Along the air inlet direction, the third filter element (16) is located at the rear side of the first filter element (14), and the filtering grade of the third filter element (16) is greater than that of the first filter element (14).

6. The head-mounted air supply device according to claim 5, characterized in that: A second filter element (15) is further provided between the first filter element (14) and the third filter element (16), and the second filter element (15) is an activated carbon filter element.

7. The head-mounted air supply device according to claim 4, characterized in that: The air purifier (1) is further provided with a fan (8), and the fan (8) is capable of sucking air from the first air inlet (3) and discharging air from the first air outlet (4).

8. The head-mounted air supply device according to claim 7, characterized in that: It also includes a rechargeable battery (9), which is electrically connected to the fan (8).

9. The head-mounted air supply device according to claim 4, characterized in that: The air purifier (1) is adapted to be equipped with a waist belt (11).

10. The head-mounted air supply device according to any one of claims 4 to 9, characterized in that: The first air outlet (4) is connected to the second air inlet (5) via a bellows.

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