A low-windage lightweight powered air-purifying respirator

Abstract

The utility model discloses a low wind resistance light weight power air supply filter formula respirator relates to respiratory protection equipment technical field. Including host body, the host body includes filter core cavity, fan cavity, air passage, filter core cavity with fan cavity is side by side arrangement, the air passage sets up in filter core cavity with fan cavity's bottom, the air passage includes adjacent first inclined plane and second inclined plane, first inclined plane and second inclined plane respectively with filter core cavity and fan cavity's bottom surface coplanar, and environmental gas passes filter core cavity, first inclined plane, air passage inside in proper order, and then passes air passage inside, second inclined plane, fan cavity in proper order. The utility model discloses through the inclined plane air passage structure has reduced gas flow resistance, has reduced the whole machine weight simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of respiratory protection equipment technology, specifically a low-resistance, lightweight powered air-purifying respirator. Background Technology

[0002] In the field of respiratory protection, powered air-purifying respirators (PEPRs) are widely used in environments polluted by dust, harmful gases, and other contaminants. Traditional PPRs typically employ a rectangular parallel airway structure within the main body. This structure tends to generate significant air resistance during gas flow, affecting gas delivery efficiency. Furthermore, the rectangular parallel airway design necessitates a certain thickness in the main body to accommodate it, increasing the overall weight of the respirator and causing inconvenience to the user. Utility Model Content

[0003] The purpose of this invention is to provide a low-drag, lightweight, powered air-purifying respirator to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A low-resistance, lightweight, powered air-purifying respirator includes a main body, which comprises a filter cavity, a fan cavity, and an air duct. The filter cavity and the fan cavity are arranged side by side, and the air duct is located at the bottom of the filter cavity and the fan cavity. The air duct includes adjacent first and second inclined surfaces, which are coplanar with the bottom surfaces of the filter cavity and the fan cavity, respectively. Ambient gas passes sequentially through the filter cavity, the first inclined surface, and the interior of the air duct, and then sequentially through the interior of the air duct, the second inclined surface, and the fan cavity.

[0005] Existing technologies typically involve placing an air passage directly below the filter chamber and the fan chamber. However, this air passage is rectangular, and the gas path involves vertical entry into the filter chamber, vertical entry into the air passage, horizontal transmission within the air passage, and vertical upward entry into the fan chamber. This pattern results in significant air resistance, requiring two detours. To optimize this design and reduce air resistance, this invention constructs an air passage with a first and a second inclined plane. The first inclined plane is the bottom surface of the filter chamber, and the second inclined plane is the bottom surface of the fan chamber. Therefore, the gas is transmitted in an arc from the first inclined plane to the second inclined plane, optimizing the gas flow path from a right angle to an arc angle. Tests have shown that this structure results in even lower air resistance.

[0006] The first and second inclined surfaces have a connecting port. A filter element is installed inside the filter element cavity, and a fan is installed in the fan cavity. The ambient gas is drawn into the filter element cavity by the negative pressure generated by the fan. The ambient gas flows through the filter element, and the filter element filters out the harmful components in the ambient gas. The filtered clean gas enters the air duct through the connecting port of the first inclined surface. The clean gas flows along the first inclined surface to the second inclined surface in the air duct and reaches the connecting port of the second inclined surface. The clean gas enters the fan cavity through the connecting port of the second inclined surface, is pressurized by the power provided by the fan, and the pressurized clean gas is discharged from the air outlet of the fan cavity.

[0007] The airway also includes an airway bottom surface, one end of which is connected to a first inclined surface via a first vertical surface, and the other end of which is connected to a second inclined surface via a second vertical surface.

[0008] The lengths of the first and second vertical surfaces are 0-N cm, where N>0.

[0009] When the length of the first and second vertical surfaces is 0 cm, the airway is triangular in shape, consisting of the first inclined surface, the second inclined surface, and the bottom surface of the airway. When it is necessary to increase the airway flow rate, the length of the first and second vertical surfaces is selected to be greater than zero (N). At this time, the shape of the airway includes a combination of triangles and quadrilaterals. The appropriate flow rate is selected by choosing the volume of the quadrilateral.

[0010] The main body is made of one or more materials selected from nylon, PP, ABS, ASA, and PC, and is formed by 3D printing or injection molding.

[0011] The filter element is made of one or more of the following composite materials: glass fiber, PTFE membrane, meltblown electrostatic cotton, and activated carbon.

[0012] It also includes an air supply duct, which includes a main body connecting ring, a Y-shaped diversion structure, a main pipe, a diversion pipe, and a pair of quick connectors. One end of the main body connecting ring is connected to the fan cavity, and the other end of the main body connecting ring is connected to the inlet end of the Y-shaped diversion structure. The two outlet ends of the Y-shaped diversion structure are respectively connected to one end of the main pipe and one end of the diversion pipe. The other ends of the main pipe and the diversion pipe are connected to the soft mask through quick connectors.

[0013] The soft face mask is ergonomically designed so that its facial curves can fit the face. The main body of the soft face mask is made of polycarbonate, silicone, TPU or PU. The part of the soft face mask that comes into contact with the face is made of EPDM, PU, ​​TPU, CR or silicone, and this part can be wrapped with synthetic fiber or natural fiber fabric.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. Reduced air resistance: The air duct adopts an adjacent first and second inclined plane structure design. Compared with rectangular parallel air ducts, this inclined air duct makes the airflow smoother during the flow process, effectively reducing the resistance of the air flow, improving the efficiency of air delivery, and allowing users to obtain clean air more smoothly.

[0015] 2. Weight reduction: Due to the sloping structure of the airway, the structure of the main body can be optimized while ensuring gas flow performance, reducing unnecessary material usage, thereby reducing the overall weight of the respirator, reducing the burden on the user when wearing it, and improving the comfort of use.

[0016] 3. The soft face mask is designed like a mask, thin and light, avoiding the bulkiness of other designs, and is comfortable to wear for a long time. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a side view of the main body of the present invention.

[0018] Figure 2 This is a structural diagram of the powered air-purifying respirator of this utility model.

[0019] The attached diagram shows the markings and corresponding component names: 1. Filter cartridge cavity; 2. Fan cavity; 3. Air duct; 31. First inclined surface; 32. Second inclined surface; 33. Bottom surface of air duct; 34. First vertical surface; 35. Second vertical surface; 4. Soft mask; 5. Quick connector; 6. Diverter pipe; 7. Main pipeline; 8. Y-shaped diverter structure; 9. Main body connecting ring; 10. Main body. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0021] like Figure 1 As shown, Figure 1This is a side view of the main body 10 of this utility model. The main body 10 includes a filter element cavity 1, a fan cavity 2, and an air duct 3. The filter element cavity 1 and the fan cavity 2 are arranged side by side, and the air duct 3 is located at the bottom of the filter element cavity 1 and the fan cavity 2. The air duct 3 includes an adjacent first inclined surface 31 and a second inclined surface 32. The first inclined surface 31 and the second inclined surface 32 are coplanar with the bottom surfaces of the filter element cavity 1 and the fan cavity 2, respectively. The ambient gas passes sequentially through the filter element cavity 1, the first inclined surface 31, and the interior of the air duct 3, and then sequentially through the interior of the air duct 3, the second inclined surface 32, and the fan cavity 2.

[0022] Existing technologies typically involve placing an air passage directly below the filter chamber and the fan chamber. However, this air passage is rectangular, and the gas path is vertically entering the filter chamber, then vertically into the air passage, flowing laterally within the air passage, and finally vertically upward into the fan chamber. This pattern results in significant air resistance, requiring two detours. To optimize this design and reduce air resistance, this invention constructs an air passage 3 with a first inclined surface 31 and a second inclined surface 32. The first inclined surface 31 is the bottom surface of the filter chamber 1, and the second inclined surface 32 is the bottom surface of the fan chamber 2. Therefore, the gas flows in an arc from the first inclined surface 31 to the second inclined surface 32, optimizing the gas flow path from a right angle to an arc angle. Tests have shown that this structure results in lower air resistance.

[0023] Preferably, the first inclined surface 31 and the second inclined surface 32 have a connecting port. A filter element is installed inside the filter element cavity 1, and a fan is installed in the fan cavity 2. The ambient gas is drawn into the filter element cavity 1 by the negative pressure generated by the fan. The ambient gas flows through the filter element, and the filter element filters the harmful components in the ambient gas. The filtered clean gas enters the air passage 3 through the connecting port of the first inclined surface 31. The clean gas flows along the first inclined surface 31 to the second inclined surface 32 in the air passage 3 and reaches the connecting port of the second inclined surface 32. The clean gas enters the fan cavity 2 through the connecting port of the second inclined surface 32, is pressurized by the power provided by the fan, and the pressurized clean gas is discharged from the air outlet of the fan cavity 2.

[0024] Preferably, the airway 3 further includes an airway bottom surface 33, one end of which is connected to the first inclined surface 31 via a first vertical surface 34, and the other end of which is connected to the second inclined surface 32 via a second vertical surface 35.

[0025] Preferably, the lengths of the first vertical surface 34 and the second vertical surface 35 are 0-N cm, where N>0.

[0026] When the length of the first vertical surface 34 and the second vertical surface 35 is 0 cm, the shape of the airway 3 is triangular, consisting of the first inclined surface 31, the second inclined surface 32, and the bottom surface of the airway 33. When it is necessary to increase the flow rate of the airway 3, the length of the first vertical surface 34 and the second vertical surface 35 is selected to be greater than zero (N). At this time, the shape of the airway 3 includes a combination of triangles and quadrilaterals. The appropriate flow rate is selected by choosing the volume of the quadrilateral.

[0027] Preferably, the main body 10 is made of one or more materials selected from nylon, PP, ABS, ASA, and PC, and is formed by 3D printing or injection molding.

[0028] Preferably, the filter element is made of one or more of the following composite materials: glass fiber, PTFE membrane, meltblown electrostatic cotton, and activated carbon.

[0029] like Figure 2 As shown, Figure 2 This is a structural diagram of the powered air-purifying respirator of this utility model. The filter also includes an air supply duct, which includes a main body connecting ring 9, a Y-shaped diversion structure 8, a main pipe 7, a diversion pipe 6, and a pair of quick connectors 5. One end of the main body connecting ring 9 is connected to the fan cavity 2, and the other end of the main body connecting ring 9 is connected to the inlet end of the Y-shaped diversion structure 8. The two outlet ends of the Y-shaped diversion structure 8 are respectively connected to one end of the main pipe 7 and the diversion pipe 6. The other ends of the main pipe 7 and the diversion pipe 6 are connected to the soft mask 4 through the quick connectors 5.

[0030] Preferably, the soft mask 4 is ergonomically designed so that its facial curves can fit the face; the main body of the soft mask 4 is made of polycarbonate, silicone, TPU or PU; the part of the soft mask 4 that contacts the face is made of EPDM, PU, ​​TPU, CR or silicone, and this contact part can be wrapped with synthetic fiber or natural fiber fabric.

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A low-resistance, lightweight, powered air-purifying respirator, comprising a main body (10), the main body (10) including a filter element cavity (1), a fan cavity (2), and an air duct (3), wherein the filter element cavity (1) and the fan cavity (2) are arranged side by side, and the air duct (3) is disposed at the bottom of the filter element cavity (1) and the fan cavity (2); characterized in that, The air passage (3) includes an adjacent first inclined surface (31) and a second inclined surface (32). The first inclined surface (31) and the second inclined surface (32) are coplanar with the bottom surfaces of the filter element cavity (1) and the fan cavity (2), respectively. The ambient gas passes through the filter element cavity (1), the first inclined surface (31), the interior of the air passage (3) in sequence, and then passes through the interior of the air passage (3), the second inclined surface (32), and the fan cavity (2) in sequence.

2. The low-resistance, lightweight, powered air-purifying respirator according to claim 1, characterized in that, The first inclined surface (31) and the second inclined surface (32) have a connecting port. A filter element is installed inside the filter element cavity (1), and a fan is installed in the fan cavity (2). The ambient gas is drawn into the filter element cavity (1) by the negative pressure generated by the fan. The ambient gas flows through the filter element, and the filter element filters the harmful components in the ambient gas. The filtered clean gas enters the air passage (3) through the connecting port of the first inclined surface (31). The clean gas flows along the first inclined surface (31) to the second inclined surface (32) in the air passage (3) and reaches the connecting port of the second inclined surface (32). Clean gas enters the fan cavity (2) through the connecting port of the second inclined surface (32), is pressurized by the power provided by the fan, and the pressurized clean gas is discharged from the air outlet of the fan cavity (2).

3. The low-resistance, lightweight, powered air-purifying respirator according to claim 1, characterized in that, The airway (3) also includes an airway bottom surface (33), one end of which is connected to the first inclined surface (31) via the first vertical surface (34), and the other end of which is connected to the second inclined surface (32) via the second vertical surface (35).

4. A low-resistance, lightweight, powered air-purifying respirator according to claim 3, characterized in that, The lengths of the first vertical surface (34) and the second vertical surface (35) are 0-Ncm, where N>0.

5. A low-resistance, lightweight, powered air-purifying respirator according to claim 1, characterized in that, It also includes an air supply duct, which includes a main body connecting ring (9), a Y-shaped diversion structure (8), a main pipe (7), a diversion pipe (6), and a pair of quick connectors (5). One end of the main body connecting ring (9) is connected to the fan cavity (2), and the other end of the main body connecting ring (9) is connected to the inlet end of the Y-shaped diversion structure (8). The two outlet ends of the Y-shaped diversion structure (8) are respectively connected to one end of the main pipe (7) and the diversion pipe (6). The other ends of the main pipe (7) and the diversion pipe (6) are connected to the soft mask (4) through the quick connectors (5).

6. A low-resistance, lightweight, powered air-purifying respirator according to claim 5, characterized in that, The soft mask (4) is ergonomically designed so that its facial curves fit the face. The main body of the soft mask (4) is made of polycarbonate, silicone, TPU or PU. The part of the soft mask (4) that comes into contact with the face is made of EPDM, PU, ​​TPU, CR or silicone, and the part that comes into contact with the face can be wrapped with synthetic or natural fiber fabric.

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