Positive pressure powered air respirator helmet

Abstract

The application discloses a positive pressure power air supply protective helmet, which comprises a helmet shell, a helmet lining and an air supply assembly. The helmet shell is provided with an air inlet. The helmet lining is located between the helmet shell and the helmet lining to define a helmet air duct. The helmet air duct is communicated with the air inlet. The air outlet of the helmet air duct is located above the face of a wearer. At least a part of the helmet lining is elastic and is inflated and expanded to tightly fit the head of the wearer when air is supplied into the helmet air duct. The air supply assembly comprises a fan and an air supply pipe. The air supply pipe is communicated with the fan and the air inlet to supply air into the helmet air duct through the air inlet. The power of the fan can be adjusted to adjust the pressure in the helmet air duct. The protective helmet provided by the application has good buffering function and positive pressure air supply function. The helmet air duct can be adapted to different head sizes by adjusting the air pressure. The positive pressure power air supply protective helmet provided by the application has the advantages of light weight, high adaptability and low manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protective helmets, in particular to a positive pressure power air supply protective helmet. BACKGROUND

[0002] The environment in a mine is hot and humid and has a lot of dust, in order to protect the life and health safety of miners, a protective helmet is needed to be worn and a positive pressure air supply system is needed to be equipped, so as to avoid dust from entering the inside of the helmet and to provide safety protection for the head of the miner. The positive pressure power air supply protective helmet in the related art is usually designed with an air supply channel structure, which will inevitably increase the weight of the helmet to some extent. For people working in a mine, the weight will affect the work efficiency, and long-term wearing of a heavy helmet will cause diseases of the cervical vertebra. Moreover, a helmet with matching parameters needs to be selected according to the different sizes of the head, and for people with larger or smaller head sizes, a helmet mold needs to be specially designed, which greatly increases the manufacturing cost. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the embodiments of the present application provide a positive pressure power air supply protective helmet with light weight and low cost.

[0004] The positive pressure power air supply protective helmet provided by the embodiments of the present application comprises a helmet shell and a helmet lining, the helmet shell is provided with an air inlet, the helmet lining is located between the helmet shell and the helmet shell to define a helmet air duct, the helmet air duct is in communication with the air inlet, the air outlet of the helmet air duct is located above the face of the wearer, at least a part of the helmet lining is elastic and inflates and expands to closely fit the head of the wearer when air is supplied into the helmet air duct; an air supply assembly, the air supply assembly comprises a fan and an air supply pipe, the air supply pipe is in communication with the fan and the air inlet for supplying air to the helmet air duct through the air inlet, the power of the fan is adjustable to adjust the pressure in the helmet air duct.

[0005] The embodiments of the present application provide a positive pressure power air supply protective helmet, which uses the helmet lining and the inflated helmet air duct as a buffer layer, compared with the helmet with an air supply channel structure in the related art, the weight of the helmet itself is greatly reduced, at the same time, the helmet has good buffering function and positive pressure air supply function, solving the problem of large weight of the helmet with the air supply channel structure, which is of great significance to the miners. Moreover, the protective helmet provided by the embodiments of the present application can be adapted to different sizes of the head by adjusting the size of the air pressure of the helmet air duct, solving the problem of large development cost of the helmet mold. Therefore, the positive pressure power air supply protective helmet provided by the embodiments of the present application has the characteristics of light weight, high adaptability and low manufacturing cost.

[0006] In some embodiments, the helmet liner comprises a deformable portion and an air outlet end connecting portion, the deformable portion is elastic, the air outlet end connecting portion is rigid, and the air outlet end connecting portion is connected to the inner wall of the helmet shell and defines the air outlet with the inner wall.

[0007] In some embodiments, the deformable portion is made of rubber.

[0008] In some embodiments, the helmet liner is inflated to at least fit the top of the head and a portion of the back of the head.

[0009] In some embodiments, the air inlet is arranged at a position corresponding to the back of the head on the helmet shell; and / or, the helmet air duct comprises a plurality of sub-ducts connected in parallel with each other, each of the sub-ducts being in communication with the air inlet and the air outlet.

[0010] In some embodiments, the helmet shell comprises a transparent visor in front of the face, the air outlet is arranged to direct air to a gap between the transparent visor and the face, and the transparent visor is sealingly connected to other parts of the helmet shell.

[0011] In some embodiments, a flow control valve is arranged at the air outlet, and the flow control valve is used to adjust the flow rate of air ejected from the air outlet.

[0012] In some embodiments, the positive pressure powered ventilation protective helmet further comprises a pressure sensor arranged in the helmet air duct to detect the pressure in the helmet air duct.

[0013] In some embodiments, the positive pressure powered ventilation protective helmet further comprises a controller, the pressure sensor is signal connected to the controller, and the controller is also electrically connected to the air blower, the controller is used to receive the pressure detection signal of the pressure sensor and determine the relationship between the pressure detection value and the pressure set threshold value, and when it is determined that the pressure detection value is greater than or equal to the pressure set threshold value, the controller controls the air blower to reduce the power.

[0014] In some embodiments, the controller is also electrically connected to the flow control valve, and the controller dynamically adjusts the power of the air blower according to the opening degree of the flow control valve. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of a positive pressure powered ventilation protective helmet (not inflated) provided by an embodiment of the present application.

[0016] Figure 2 is a structural schematic diagram of a positive pressure powered ventilation protective helmet (inflated) provided by an embodiment of the present application.

[0017] Figure 3 is a top view of a single-duct protective helmet provided by an embodiment of the present application.

[0018] Figure 4 is a top view of a multi-duct protective helmet provided by an embodiment of the present application.

[0019] Reference signs:

[0020] Helmet shell 1, air inlet 11, transparent face shield 12, helmet liner 2, helmet air duct 21, sub-air duct 211, air outlet 22, deformation part 23, air outlet end connecting part 24, connecting strip 25, flow control valve 26, air supply pipe 3, head 4, pressure sensor 5, protective cloth cover 6. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0022] The basic structure of the positive pressure power air supply protective helmet provided by the embodiments of the present application is described below. Figures 1-4 The protective helmet includes a helmet shell 1, a helmet liner 2 and an air supply assembly, the helmet shell 1 is provided with an air inlet 11, the helmet liner 2 is located between the helmet shell 1 and the helmet shell 1 to define a helmet air duct 21, the helmet air duct 21 is in communication with the air inlet 11, the air outlet 22 of the helmet air duct 21 is located above the face of the wearer, at least a part of the helmet liner 2 is elastic and inflated and expanded to closely fit the head 4 of the wearer when air is introduced into the helmet air duct 21, the helmet liner 2 closely fitted with the head 4 plays a good protective role, the helmet air duct 21 inflated has a certain pressure, which forms a good buffering effect on the head 4 of the wearer.

[0023] The air supply assembly includes a fan and an air supply pipe 3, the air supply pipe 3 is in communication with the fan and the air inlet 11 for supplying air to the helmet air duct 21 through the air inlet 11, the airflow flows along the helmet air duct 21 and flows out of the air outlet 22, which can provide fresh air to the wearer and form a positive pressure environment inside the helmet to prevent dust from invading and protect the respiratory system of the wearer.

[0024] The power of the fan can be adjusted to adjust the pressure in the helmet air duct 21, so the expansion degree of the helmet lining 2 can be adjusted by adjusting the power of the fan, so that the wearer can adjust the pressure of the helmet lining 2 on the head 4, and the helmet can be adapted to the wearer with different sizes of the head 4. The power of the fan is increased, the airflow flowing into the helmet air duct 21 is increased, the gas pressure in the helmet air duct 21 is increased, and the helmet lining 2 is forced to expand to a greater degree, forming a closer fit with the wearer's head 4, providing good cushioning, and can be adapted for use by a wearer with a smaller head 4. The power of the fan is reduced, the airflow flowing into the helmet air duct 21 is reduced, the gas pressure in the helmet air duct 21 is reduced, the helmet lining 2 is appropriately retracted, the pressure on the head 4 is reduced, and the helmet can be adapted for use by a wearer with a larger head 4.

[0025] The embodiment of the present application provides a positive pressure power ventilation protective helmet, which uses a helmet lining and an inflated helmet air duct as a buffer layer. Compared with the helmet with a ventilation channel structure in the related art, the weight of the helmet is greatly reduced, the helmet has good cushioning function and positive pressure ventilation function, the problem of large weight of the helmet with the ventilation channel structure is solved, and this is of great significance to the miners working. Moreover, the protective helmet provided by the embodiment of the present application can be adapted to different sizes of the head by adjusting the size of the helmet air duct air pressure, and the problem of large development cost of the helmet mold is solved. Therefore, the positive pressure power ventilation protective helmet provided by the embodiment of the present application has the characteristics of light weight, high adaptability and low manufacturing cost.

[0026] In some embodiments, as shown in Figure 1 and Figure 2 , the helmet shell 1 includes a transparent visor 12 located in front of the face, and the air outlet 22 is located above the transparent visor 12, and the air outlet direction is towards the gap between the transparent visor 12 and the face. The air outlet of the air outlet 22 not only provides fresh air for the miner, but also prevents the inside of the transparent visor 12 from fogging. The connection between the transparent visor 12 and the other parts of the helmet shell 1 adopts a sealing connection method with low leakage rate, for example, a "zero" leakage magnetic liquid sealing method.

[0027] In some embodiments, the size of the air outlet 22 of the helmet air duct 21 is unchanged, that is, the position of the helmet lining 2 at the air outlet is a hard structure. As shown in Figure 1 and Figure 2 , the helmet lining 2 includes a deformed part 23 and an air outlet end connecting part 24 connected together, the deformed part 23 has elasticity and can be deformed to fit the head 4, and the air outlet end connecting part 24 is a hard structure, the air outlet end connecting part 24 is connected with the inner wall of the helmet shell 1 and defines the air outlet 22 with the inner wall.

[0028] Optionally, the material of the deformation part 23 is rubber. The deformation part 23 and the helmet shell 1 are connected together by sealing glue.

[0029] As shown in Figure 1 , when the helmet air duct 21 is not inflated or the gas pressure in the helmet air duct 21 is insufficient, the deformation part 23 is in a contracted state and has a certain interval with the wearer's head. As shown in Figure 2 , when the fan is turned on to send air into the helmet air duct 21 through the air supply pipe 3, the pressure in the helmet air duct 21 increases, and the deformation part 23 deforms and expands in the direction of the wearer's head 4 under the action of the pressure, and finally tightly adheres to the head 4. It should be noted that the size of the air outlet 22 of the helmet air duct 21 does not change due to the deformation of the deformation part 23.

[0030] In order to achieve better buffering effect and protection effect, the protective helmet should be as close as possible to the head 4, and preferably, as shown in Figure 2 , the helmet lining 2 at least adheres to the top of the head and a part of the back of the head 4 after expansion.

[0031] In some embodiments, as shown in Figure 1 , the air inlet 11 is arranged at a position corresponding to the back of the head 4 of the helmet shell 1.

[0032] In some optional embodiments, as shown in Figure 3 , the helmet air duct 21 is a strip, which communicates the air inlet 11 and the interior space of the helmet.

[0033] In other optional embodiments, the helmet air duct 21 includes a plurality of parallel sub-air ducts 211, each of which communicates with the air inlet 11 and the air outlet 21, so that when one of the sub-air ducts 211 is damaged, the other sub-air ducts 211 can still ventilate normally, and the helmet can also work normally for a certain period of time.

[0034] A plurality of connecting strips 25 are connected between the helmet lining 2 and the helmet shell 1 to divide the space between the helmet lining 2 and the helmet shell 1 into a plurality of sub-air ducts 211. One side of the connecting strip 25 is sealingly connected with the helmet shell 1, and the other side is sealingly connected with the helmet lining 2. Optionally, the connecting strip 25 is of a hard structure, or the connecting strip 25 has a certain elasticity.

[0035] For example, in the embodiment shown in Figure 4 , four sub-air ducts 211 are formed between the helmet lining 2 and the helmet shell 1, and the sub-air ducts 211 are isolated from each other.

[0036] Further, as shown in Figure 1 and Figure 2As shown, the bottom of the helmet shell 1 and the transparent visor 12 is sealingly connected with a protective cloth cover 6, which surrounds the head and closely fits the wearer's neck, and the protective cloth cover 6 is provided with air holes. Optionally, the protective cloth cover 6 and the helmet shell 1 are sealingly connected by sealing glue, and the protective cloth cover 6 and the transparent visor 12 are sealingly connected by sealing glue.

[0037] In some embodiments, as shown in Figure 1 and Figure 2 As shown, the air outlet 22 is provided with a flow control valve 26 for adjusting the air flow from the air outlet 22. The wearer can adjust the flow control valve 26 to control the air volume of the air outlet 22, thereby improving the comfort of wearing.

[0038] The protective helmet can also include a pressure sensor 5 arranged in the helmet air duct 21 for detecting the pressure in the helmet air duct 21.

[0039] Further, the protective helmet includes a controller, the pressure sensor 5 is signal connected with the controller, and the controller is also electrically connected with the fan to adjust the power of the fan. The controller is used to receive the pressure detection signal of the pressure sensor 5, and judge the relationship between the pressure detection value and the pressure set threshold. When it is judged that the pressure detection value is greater than or equal to the pressure set threshold, the controller controls the fan to reduce the power. That is, when the controller detects that the pressure in the helmet air duct 21 exceeds or equals the set threshold, it means that the pressure in the helmet air duct 21 is too large at this time, and the helmet lining 2 may have a risk of rupture, and it may affect the comfort of the wearer at this time, the controller reduces the air volume of the helmet air duct 21 by controlling the power of the fan, thereby reducing the pressure in the helmet air duct 21, and ensuring the normal use of the protective helmet.

[0040] Further, the controller is also electrically connected with the flow control valve 26, and the controller dynamically adjusts the power of the fan according to the opening degree of the flow control valve 26. For example, when the wearer adjusts the flow control valve in some scenarios, in order to maintain the pressure in the helmet air duct 21, the controller controls the fan power to increase when it detects that the opening degree of the flow control valve 26 increases; when the wearer adjusts the flow control valve, in order to maintain the pressure in the helmet air duct 21, the controller controls the fan power to decrease when it detects that the opening degree of the flow control valve 26 decreases.

[0041] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated thereby. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0045] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0046] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A positive pressure powered air respirator helmet characterized by, The helmet comprises: a helmet shell and a helmet liner, the helmet shell is provided with an air inlet, the helmet liner is located in the helmet shell and defines a helmet air duct with the helmet shell, the helmet air duct is communicated with the air inlet, the air outlet of the helmet air duct is located above the face of the wearer, at least a part of the helmet liner is elastic and inflated to tightly fit the head of the wearer when air is introduced into the helmet air duct; an air supply assembly, the air supply assembly comprises a fan and an air supply pipe, the air supply pipe is communicated with the fan and the air inlet for supplying air to the helmet air duct through the air inlet, the power of the fan is adjustable to adjust the pressure in the helmet air duct.

2. The positive pressure powered air respirator helmet of claim 1, wherein, The helmet liner comprises a deformable part and an air outlet end connecting part, the deformable part is elastic, the air outlet end connecting part is a rigid structure, the air outlet end connecting part is connected with the inner wall of the helmet shell and defines the air outlet with the inner wall.

3. The positive pressure powered air respirator helmet of claim 2, wherein, The deformable part is made of rubber.

4. The positive pressure powered air respirator helmet according to any one of claims 1-3, wherein, The helmet liner is inflated to at least fit the top of the head and a part of the back of the head.

5. The positive pressure powered air respirator helmet according to any one of claims 1-3, wherein, The air inlet is arranged at a position corresponding to the back of the head on the helmet shell. And / or, the helmet air duct comprises a plurality of sub-air ducts connected in parallel with each other, each of the sub-air ducts is communicated with the air inlet and the air outlet.

6. The positive pressure powered air respirator helmet of any one of claims 1-3, wherein, The helmet shell comprises a transparent visor located in front of the face, the air outlet is directed to the gap between the transparent visor and the face, the transparent visor is sealingly connected with the other part of the helmet shell.

7. The positive pressure powered air respirator helmet of any one of claims 1-3, wherein, A flow control valve is arranged at the air outlet, the flow control valve is used to adjust the flow rate of the air flow ejected from the air outlet.

8. The positive pressure powered air respirator helmet of claim 7, wherein, A pressure sensor is further arranged in the helmet air duct for detecting the pressure in the helmet air duct.

9. The positive pressure powered air respirator helmet of claim 8, wherein, A controller is further provided, the pressure sensor is signal connected with the controller, the controller is further electrically connected with the fan, the controller is used to receive the pressure detection signal of the pressure sensor and determine the relationship between the pressure detection value and the pressure setting threshold value, when it is determined that the pressure detection value is greater than or equal to the pressure setting threshold value, the controller controls the fan to reduce the power.

10. The positive pressure powered air respirator helmet of claim 8, wherein, The controller is further electrically connected with the flow control valve, the controller dynamically adjusts the power of the fan according to the opening degree of the flow control valve.

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