Respirator with multiple air path switch

Abstract

The present invention discloses a respirator capable of switching between multiple air paths. The respirator comprises a mask body, a fan and a switching mechanism. The mask body is provided with a first open end, a second open end and an exhaust hole. The first open end is used to abut against the face of the wearer, and the second open end and the exhaust hole are respectively used to communicate with the outside world. The fan is arranged in the mask body and divides the internal space of the mask body into a breathing chamber and a filtering chamber. The fan is provided with a first air path and a second air path. The first air path is used to connect the filtering chamber and the breathing chamber, and the second air path is used to connect the breathing chamber and the exhaust hole. The switching mechanism is used to connect the first air path and disconnect the second air path, or to disconnect the first air path and connect the second air path. Two air paths are arranged on one fan. On the premise of ensuring that the wearer's breathing resistance is reduced, the overall structure is simplified, the volume is reduced, and the manufacturing cost is reduced. There is no need to switch the air paths by starting and stopping the fan, which improves the energy conversion efficiency and the switching rate of the air paths.

Description

Technical Field

[0001] The present invention relates to the technical field of respiratory equipment, and in particular to a respirator capable of switching multiple air paths. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Respirators (dust masks or dust masks, etc.) are usually used to isolate harmful particles in the air. After the wearer wears the respirator, the resistance when exhaling and inhaling will increase, resulting in a worse wearing experience for the wearer. In the prior art, two air paths each equipped with a fan are provided in the mask body, one of which is used for the wearer to exhale and the other for the wearer to inhale. The fan in each air path is started when the corresponding air path is used, thereby reducing the wearer's breathing resistance.

[0004] However, two fans need to be installed in the two air paths of the respirator, which increases the volume of the structure and increases the manufacturing cost of the respirator. In addition, the two fans operate alternately (each fan switches between operation and stillness or high speed and low speed), the energy conversion efficiency is low and the switching speed is slow, which makes the wearer's experience worse. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problems of large size, high manufacturing cost, low energy conversion rate and slow air path switching speed of the respirator. This purpose is achieved by the following technical solutions:

[0006] The present invention proposes a respirator capable of switching multiple air paths, the respirator comprising:

[0007] A mask body, wherein the mask body is provided with a first opening end, a second opening end and an exhaust hole, wherein the first opening end is used to abut against the wearer's face, and the second opening end and the exhaust hole are respectively used to communicate with the outside world;

[0008] A fan, the fan is arranged in the cover body and divides the internal space of the cover body into a breathing chamber and a filtering chamber, the fan is provided with a first air path and a second air path, the first air path is used for the communication between the filtering chamber and the breathing chamber, and the second air path is used for the communication between the breathing chamber and the exhaust hole;

[0009] A switching mechanism, the switching mechanism is used to connect the first air path and disconnect the second air path, or to disconnect the first air path and connect the second air path.

[0010] According to the respirator of the present invention, the fan is arranged in the cover body and cooperates with the inner wall of the cover body, so as to divide the internal space of the cover body into a breathing chamber and a filter chamber. Two air paths are arranged on the fan, wherein the first air path can connect the filter chamber and the breathing chamber, and the second air path can connect the breathing chamber and the exhaust hole. The first air path and the second air path can be switched for use by controlling the switching mechanism.

[0011] When the wearer uses the respirator, the first open end of the mask body rests against the wearer's face, and the wearer's mouth and nose are connected to the breathing cavity. When the wearer inhales, the switching mechanism connects the first air path and disconnects the second air path, and the fan starts, so that external air enters the filter cavity through the second open end, and then enters the breathing cavity through the first air path, thereby providing sufficient air for the wearer and reducing the resistance when the wearer inhales. When the wearer exhales, the switching structure disconnects the first air path and connects the second air path, and the fan starts, the gas exhaled by the wearer enters the breathing cavity, and then is discharged to the outside through the second air path and the exhaust hole, thereby reducing the resistance when the wearer exhales.

[0012] By setting two air paths on one fan, the overall structure of the respirator is effectively simplified, the overall volume is reduced, and the manufacturing cost of the respirator is reduced while ensuring that the wearer's breathing resistance is reduced. In addition, there is no need to switch the air path by starting and stopping the fan, thereby improving the energy conversion efficiency and the switching rate of the air path, thereby improving the wearer's user experience.

[0013] In addition, the respirator according to the present invention may also have the following additional technical features:

[0014] In some embodiments of the present invention, the switching mechanism includes:

[0015] a first wind shielding structure, the first wind shielding structure is arranged corresponding to the first wind path and is used to open or close the first wind path;

[0016] A second wind shielding structure, wherein the second wind shielding structure is arranged corresponding to the second wind path and is used to open or close the second wind path.

[0017] In some embodiments of the present invention, the fan comprises:

[0018] A housing, wherein the housing is provided with a first air outlet, a second air outlet, a first air inlet, and a second air inlet, the first air outlet is connected to the exhaust hole, the second air outlet is connected to the breathing cavity, the first air inlet is connected to the breathing cavity, and the second air inlet is connected to the filter cavity;

[0019] a volute, the volute being rotatably disposed in the housing, the volute being provided with an air outlet, a first air inlet, and a second air inlet, the second air inlet, the second air inlet, the interior of the volute, and the second air outlet forming the first air path, and the first air inlet, the first air inlet, the interior of the volute, and the first air outlet forming the second air path;

[0020] An impeller is rotatably arranged in the volute.

[0021] In some embodiments of the present invention, the first wind shielding structure is the first outer surface of the volute facing the first air inlet hole, and when the volute rotates relative to the outer shell and the first air inlet is staggered relative to the first air inlet hole, the first outer surface closes the first air inlet hole, and when the volute rotates relative to the outer shell and at least part of the first air inlet is arranged corresponding to at least part of the first air inlet hole, the first air inlet is connected to the breathing cavity through the first air inlet hole.

[0022] In some embodiments of the present invention, there are multiple first air inlets, each of which is arranged at circumferential intervals along the volute, the number of the first air inlet holes is consistent with the number of the first air inlet holes, and the first air inlet holes are arranged corresponding to the first air inlet holes.

[0023] In some embodiments of the present invention, the second wind shielding structure is the second outer surface of the volute facing the second air inlet hole, and when the volute rotates relative to the outer shell and the second air inlet is staggered relative to the second air inlet hole, the second outer surface closes the second air inlet hole, and when the volute rotates relative to the outer shell and at least part of the second air inlet is arranged corresponding to at least part of the second air inlet hole, the second air inlet is connected to the filter chamber through the second air inlet hole.

[0024] In some embodiments of the present invention, there are multiple second air inlets, each of which is arranged at circumferential intervals along the volute, the number of the second air inlet holes is consistent with the number of the second air inlet holes, and the second air inlet holes are arranged corresponding to the second air inlet holes.

[0025] In some embodiments of the present invention, the respirator further comprises a filter element, wherein the filter element cooperates with the mask body and covers the second open end.

[0026] In some embodiments of the present invention, the respirator further comprises an air valve, wherein the air valve is disposed at the exhaust hole, and the air valve is a one-way conducting structure from the first air outlet to the outside.

[0027] In some embodiments of the invention, the respirator further comprises:

[0028] A driving member, the driving member is disposed in the housing and drivingly connected to the volute;

[0029] A controller, wherein the driving member is electrically connected to the controller;

[0030] An air pressure sensor, the air pressure sensor is disposed in the breathing cavity and is electrically connected to the controller;

[0031] A power supply is electrically connected to the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0033] Figure 1 The structure diagram of the respirator according to the embodiment of the present invention is schematically shown;

[0034] Figure 2 for Figure 1 A partial cross-sectional view of the respirator shown in FIG. 1 when in an inhalation state;

[0035] Figure 3 for Figure 2 A schematic diagram of the structure of the fan of the respirator shown in ;

[0036] Figure 4 for Figure 2 A schematic structural diagram of another perspective of the respirator shown in ;

[0037] Figure 5 for Figure 4 A schematic diagram of the structure of the fan of the respirator shown in ;

[0038] Figure 6 for Figure 1 A partial cross-sectional view of the respirator shown in FIG. 1 when in an exhalation state;

[0039] Figure 7 for Figure 6 A schematic diagram of the structure of the fan of the respirator shown in ;

[0040] Figure 8 for Figure 6 A schematic structural diagram of another perspective of the respirator shown in ;

[0041] Fig. 9 for Figure 8 A schematic diagram of the structure of the fan of the respirator shown in ;

[0042] Fig.10 It is a cross-sectional view of the fan when it is in the suction state;

[0043] Fig.11 This is a cross-sectional view of the fan in the exhalation state.

[0044] The reference numerals are as follows:

[0045] 100 for respirators;

[0046] 10 is a cover body;

[0047] 11 is a first opening end, 12 is a breathing cavity, 13 is a filtering cavity, 14 is a second opening end, 15 is an exhaust hole, and 16 is a communicating cavity;

[0048] 20 is a fan;

[0049] 21 is a housing, 211 is a first air inlet, 212 is a second air inlet, 213 is a second air outlet, and 214 is a first air outlet;

[0050] 22 is a volute, 221 is a first outer surface, 222 is an air outlet, 223 is a second air inlet, 224 is a second outer surface, and 225 is a first air inlet;

[0051] 23 is an impeller;

[0052] 30 is a filter element;

[0053] 40 is a gas valve. DETAILED DESCRIPTION

[0054] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0055] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0056] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0057] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0058] like Figure 1 and Fig.11 As shown, according to an embodiment of the present invention, the present invention proposes a respirator 100 with multiple air path switchable, the respirator 100 includes a mask body 10, a fan 20 and a switching mechanism, the mask body 10 is provided with a first open end 11, a second open end 14 and an exhaust hole 15, the first open end 11 is used to abut against the wearer's face, the second open end 14 and the exhaust hole 15 are respectively used to communicate with the outside world, the fan 20 is arranged in the mask body 10 and divides the internal space of the mask body 10 into a breathing chamber 12 and a filter chamber 13, the fan 20 is provided with a first air path and a second air path, the first air path is used to connect the filter chamber 13 with the breathing chamber 12, the second air path is used to connect the breathing chamber 12 with the exhaust hole 15, the switching mechanism is used to connect the first air path and disconnect the second air path, or to disconnect the first air path and connect the second air path.

[0059] Specifically, the fan 20 is disposed in the cover body 10 and cooperates with the inner wall of the cover body 10, so as to divide the internal space of the cover body 10 into a breathing chamber 12 and a filter chamber 13. Two air paths are arranged on the fan 20, wherein the first air path can connect the filter chamber 13 with the breathing chamber 12, and the second air path can connect the breathing chamber 12 with the exhaust hole 15. The first air path and the second air path can be switched for use by controlling the switching mechanism.

[0060] When the wearer uses the respirator 100, the first open end 11 of the mask body 10 rests on the wearer's face, and the wearer's mouth and nose are connected to the breathing chamber 12. When the wearer inhales, the switching mechanism connects the first air path and disconnects the second air path, and the fan 20 is started, so that the external air enters the filter chamber 13 through the second open end 14, and then enters the breathing chamber 12 through the first air path, thereby providing sufficient air for the wearer and reducing the resistance when the wearer inhales. When the wearer exhales, the switching structure disconnects the first air path and connects the second air path, and the fan 20 is started, and the gas exhaled by the wearer enters the breathing chamber 12, and then is discharged to the outside through the second air path and the exhaust hole 15, thereby reducing the resistance when the wearer exhales.

[0061] By providing two air paths on one fan 20, the overall structure of the respirator 100 is effectively simplified while ensuring that the wearer's breathing resistance is reduced, so that the overall volume is reduced and the manufacturing cost of the respirator 100 is reduced. In addition, there is no need to switch the air paths by starting and stopping the fan 20, thereby improving the energy conversion efficiency, increasing the switching rate of the air paths, and further improving the wearer's use experience.

[0062] It should be understood that the interior of the mask body 10 can be connected to the outside through the first opening end 11, the second opening end 14, and the exhaust hole 15. When the first opening end 11 is against the wearer's face, the air when the wearer inhales enters through the second opening end 14, and the exhaust gas when the wearer exhales is discharged through the exhaust hole 15, so that the wearer can effectively obtain fresh air, thereby improving the wearer's usage experience.

[0063] In addition, the switching mechanism switches the first air path and the second air path according to the wearer's breathing movements. When the wearer inhales, the switching mechanism opens the first air path and closes the second air path. When the wearer exhales, the switching mechanism closes the first air path and opens the second air path. During the process of the switching mechanism switching the air paths, the fan 20 is always in operation, and there is no need to switch the air paths by starting and stopping, thereby ensuring the energy conversion efficiency and improving the switching effect of the air paths.

[0064] In addition, in the present invention, the space inside the mask body 10 is divided by the fan 20, so that a breathing chamber 12 and a filter chamber 13 are formed on both sides of the fan 20, the first opening end 11 is against the wearer's face, the wearer's mouth and nose are located in the breathing chamber 12, and the filter chamber 13 is arranged away from the wearer's mouth and nose, so that the overall layout of the respirator 100 is more reasonable, thereby avoiding the situation where the volume of the respirator 100 increases due to the addition of an air path.

[0065] It is further understood that if Figure 1 and Fig.11 As shown, the switching mechanism includes a first wind shielding structure and a second wind shielding structure, the first wind shielding structure is arranged corresponding to the first wind path and is used to open or close the first wind path, and the second wind shielding structure is arranged corresponding to the second wind path and is used to open or close the second wind path. Specifically, the first wind shielding structure controls the connection and disconnection of the first wind path, and the second wind shielding structure controls the connection and disconnection of the second wind path. When the wearer uses the respirator 100, the first open end 11 of the mask body 10 rests against the wearer's face to connect the wearer's mouth and nose with the breathing chamber 12. When the wearer inhales, the first wind shielding structure is in an open state, so that the first air path is connected, the second wind shielding structure is in a closed state, so that the second air path is disconnected, the fan 20 is started, and the outside air enters the filter chamber 13 through the second open end 14, and then enters the breathing chamber 12 through the first air path, thereby providing sufficient air for the wearer and reducing the resistance when the wearer inhales. When the wearer exhales, the first wind shielding structure is in a closed state, so that the first air path is disconnected, the second wind shielding structure is in an open state, so that the second air path is connected, the fan 20 is started, and the gas exhaled by the wearer enters the breathing chamber 12, and then is discharged to the outside through the second air path and the exhaust hole 15, so that the resistance when the wearer exhales is reduced.

[0066] According to the wearer's breathing movements, the first air path and the second air path are used alternately. During the switching process between the first air path and the second air path, the first wind shielding structure and the second wind shielding structure work synchronously, thereby further increasing the speed of air path switching and further improving the wearer's usage experience.

[0067] Further, the fan 20 includes an outer shell 21, a volute 22 and an impeller 23. The outer shell 21 is provided with a first air outlet 214, a second air outlet 213, a first air inlet 211 and a second air inlet 212. The first air outlet 214 is connected to the exhaust hole 15, the second air outlet 213 is connected to the breathing cavity 12, the first air inlet 211 is connected to the breathing cavity 12, and the second air inlet 212 is connected to the filter cavity 13. The volute 22 is rotatably arranged in the outer shell 21. The volute 22 is provided with an air outlet 222, a first air inlet 225 and a second air inlet 223. The second air inlet 212, the second air inlet 223, the interior of the volute 22 and the second air outlet 213 constitute a first air path, the first air inlet 211, the first air inlet 225, the interior of the volute 22 and the first air outlet 214 constitute a second air path, and the impeller 23 is rotatably arranged in the volute 22. Specifically, when the fan 20 is fixed inside the cover body 10, the first air outlet 214 of the shell 21 is arranged corresponding to the exhaust hole 15 of the cover body 10, the first air inlet 211 and the second air outlet 213 of the shell 21 are respectively connected to the breathing cavity 12 in the cover body 10, and the second air inlet 212 of the shell 21 is connected to the filter cavity 13 of the cover body 10. The volute 22 is arranged in the shell 21 and can rotate relative to the shell 21. The first air inlet 225 of the volute 22 is located on the same side as the first air inlet 211 of the shell 21, and the second air inlet 223 of the volute 22 is connected to the first air inlet 211 of the shell 21. The second air inlet 212 of the outer shell 21 is located on the same side, and the air outlet 222 of the volute 22 can be respectively arranged corresponding to the first air outlet 214 or the second air outlet 213 as the volute 22 rotates relative to the outer shell 21. The impeller 23 is arranged in the volute 22 and can rotate relative to the volute 22. Inside the cover body 10, the first air path is: second air inlet 212→second air inlet 223→interior of the volute 22→second air outlet 213; the second air path is: first air inlet 211→first air inlet 225→interior of the volute 22→first air outlet 214.

[0068] When the wearer inhales, the first wind shielding structure makes the second air inlet hole 212 and the second air inlet port 223 connected, and the second wind shielding structure makes the first air inlet hole 211 and the first air inlet port 225 disconnected. The fan 20 is started, and the external air enters the filter chamber 13 through the second opening end 14, and then enters the breathing chamber 12 through the first air path, thereby providing sufficient air for the wearer and reducing the resistance when the wearer inhales. When the wearer exhales, the first wind shielding structure makes the second air inlet hole 212 and the second air inlet port 223 disconnected, and the second wind shielding structure makes the first air inlet hole 211 and the first air inlet port 225 connected. The fan 20 is started, and the gas exhaled by the wearer enters the breathing chamber 12, and then is discharged to the outside through the second air path and the exhaust hole 15, thereby reducing the resistance when the wearer exhales. The first air path and the second air path are both disposed in the fan 20 , and the air paths are switched by controlling the switching mechanism, thereby further reducing the volume of the respirator 100 and reducing the manufacturing cost of the respirator 100 .

[0069] It should be pointed out that the first air inlet 225 and the second air inlet 223 are arranged on two opposite side walls of the volute 22 in the circumference, and the air outlet 222 is arranged on the circumference of the volute 22. The shape of the outer shell 21 is adapted to the shape of the volute 22, and the first air inlet hole 211 and the second air inlet hole 212 are arranged on two axially opposite side walls of the outer shell 21, the first air outlet hole 214 and the second air outlet hole 213 are arranged at intervals along the circumference of the outer shell 21, and the second air outlet hole 213 is provided with a connecting cavity 16 connected to the breathing cavity 12 at a position corresponding to the cover body 10. The second air outlet hole 213 is connected with the breathing cavity 12 through the connecting cavity 16, thereby ensuring the air intake in the breathing cavity 12, and the cover body 10 is provided with an exhaust cavity at a position corresponding to the first air outlet hole 214, and the exhaust cavity is connected with the outside through the exhaust hole 15, thereby ensuring that the exhaust gas can be effectively discharged through the exhaust hole 15.

[0070] In addition, the impeller 23 has an axial air intake and radially outward air outlet structure. The axes of the impeller 23 are respectively directed toward the two ends of the volute 22. The first air inlet 225 and the second air inlet 223 are respectively opened at the two ends of the volute 22. The air outlet 222 is located on the circumferential side wall of the volute 22 and is arranged corresponding to the radial outer side of the impeller 23. When the first air inlet 225 is connected with the breathing chamber 12 through the first air inlet hole 211 or the second air inlet 223 is connected with the filter chamber 13 through the second air inlet hole 212, the rotation of the impeller 23 can enable the air to enter the volute 22 through the first air inlet 225 or the second air inlet 223, and then flow out through the air outlet 222.

[0071] In addition, the fan 20 also includes a first motor, which is arranged inside the volute 22 and is connected to the impeller 23 by transmission. The first motor rotates to drive the impeller 23 to rotate, thereby realizing the air supply operation. The structure of the first motor is compact and easy to install and arrange. At the same time, the drive of the first motor is stable and efficient, which can effectively ensure the stable and efficient operation of the impeller 23. In addition, the first motor is arranged in the volute 22, and the air entering the volute 22 can dissipate the heat of the motor, thereby ensuring the service life of the first motor.

[0072] Furthermore, if Figure 1 and Fig.11 As shown, the first wind-blocking structure is the first outer surface 221 of the volute 22 facing the first air inlet hole 211. When the volute 22 rotates relative to the outer shell 21 and the first air inlet 225 is staggered relative to the first air inlet hole 211, the first outer surface 221 closes the first air inlet hole 211. When the volute 22 rotates relative to the outer shell 21 and at least part of the first air inlet 225 is arranged corresponding to at least part of the first air inlet hole 211, the first air inlet 225 is connected to the breathing cavity 12 through the first air inlet hole 211. Specifically, the first air inlet 225 is provided on the first outer surface 221. When the volute 22 rotates relative to the outer shell 21 and the first air inlet 211 and the first air inlet 225 are in a completely staggered state, the first outer surface 221 closes the first air inlet 211. At this time, the first air inlet 225 is disconnected from the breathing cavity 12 through the first air inlet 211. When the volute 22 rotates relative to the outer shell 21 and the first air inlet 211 and the first air inlet 225 are in a partially staggered state, the first air inlet 225 is connected to the breathing cavity 12 through the first air inlet 211. At this time, air can enter the volute 22 through the first air inlet 211 and the first air inlet 225. The rotation of the volute 22 relative to the outer shell 21 not only realizes the switching of the position of the air outlet 222, but also realizes the control of whether the first air inlet 225 is connected to the breathing cavity 12 through the first air inlet 211, thereby realizing the rapid switching of the air path.

[0073] It should be understood that when the first air inlet 211 partially overlaps with the first air inlet 225, the first air inlet 211 is in a partially open state, and when the first air inlet 211 completely corresponds to the first air inlet 225, the first air inlet 211 is in a fully open state. By controlling the offset position of the first air inlet 211 relative to the first air inlet 225, the amount of air entering through the first air inlet 211 can be controlled.

[0074] Furthermore, if Figure 1 and Fig.11As shown, there are multiple first air inlets 225, each of which is arranged at intervals along the circumference of the volute 22, and the number of the first air inlet holes 211 is consistent with the number of the first air inlets 225, and the first air inlet holes 211 are arranged correspondingly to the first air inlets 225. Specifically, multiple first air inlets 225 are arranged at intervals along the circumference of the volute 22, and when the volute 22 rotates relative to the outer shell 21, the air outlet 222 of the volute 22 switches between the first air outlet hole 214 and the second air outlet hole 213 of the outer shell 21, and when the air outlet 222 corresponds to the first air outlet hole 214, each of the first air inlet holes 211 of the outer shell 21 is arranged in one-to-one correspondence with each of the first air inlets 225 of the volute 22, thereby ensuring that when the position of the air outlet 222 is switched, the first air inlet 225 is effectively connected with the breathing cavity 12 through the first air inlet hole 211, thereby ensuring the smoothness of the air path. In addition, multiple first air inlet holes 211 and multiple first air inlet ports 225 are provided, thereby increasing the air output of the breathing cavity 12, further reducing the resistance of the wearer when exhaling, and further improving the wearer's usage experience.

[0075] Furthermore, if Figure 1 and Fig.11 As shown, the second wind-blocking structure is the second outer surface 224 of the volute 22 facing the second air inlet hole 212. When the volute 22 rotates relative to the outer shell 21 and the second air inlet 223 is staggered relative to the second air inlet hole 212, the second outer surface 224 closes the second air inlet hole 212. When the volute 22 rotates relative to the outer shell 21 and at least part of the second air inlet 223 is arranged corresponding to at least part of the second air inlet hole 212, the second air inlet 223 is connected to the filter chamber 13 through the second air inlet hole 212. Specifically, the second air inlet 223 is provided on the second outer surface 224. When the volute 22 rotates relative to the outer shell 21 and the second air inlet 212 and the second air inlet 223 are in a completely staggered state, the second outer surface 224 closes the second air inlet 212. At this time, the second air inlet 223 is disconnected from the filter chamber 13 through the second air inlet 212. When the volute 22 rotates relative to the outer shell 21 and the second air inlet 212 and the second air inlet 223 are in a partially staggered state, the second air inlet 223 is connected to the filter chamber 13 through the second air inlet 212. At this time, air can enter the volute 22 through the second air inlet 212 and the second air inlet 223. The rotation of the volute 22 relative to the outer shell 21 not only realizes the switching of the position of the air outlet 222, but also realizes the control of whether the second air inlet 223 is connected to the filter chamber 13 through the second air inlet 212, thereby realizing the rapid switching of the air path.

[0076] It should be understood that when the second air inlet 212 partially overlaps with the second air inlet 223, the second air inlet 212 is in a partially open state, and when the second air inlet 212 completely corresponds to the second air inlet 223, the second air inlet 212 is in a fully open state. By controlling the offset position of the second air inlet 212 relative to the second air inlet 223, the amount of air entering through the second air inlet 212 can be controlled.

[0077] In addition, the first air inlet 225 and the second air inlet 223 are staggered in the circumferential direction of the volute 22. When the first air inlet 225 is connected with the breathing chamber 12 through the first air inlet hole 211, the second air inlet 223 is disconnected from the filter chamber 13 through the second air inlet hole 212. Conversely, when the second air inlet 223 is connected with the filter chamber 13 through the second air inlet hole 212, the first air inlet 225 is disconnected from the breathing chamber 12 through the first air inlet hole 211. The air inlet direction of the fan 20 is switched by rotating the volute 22, and the rapid switching of the air path of the fan 20 is further achieved.

[0078] Furthermore, if Figure 1 and Fig.11 As shown, there are multiple second air inlets 223, each second air inlet 223 is arranged at intervals along the circumference of the volute 22, the number of the second air inlet holes 212 is consistent with the number of the second air inlets 223, and the second air inlet holes 212 are arranged correspondingly to the second air inlets 223. Specifically, multiple second air inlets 223 are arranged at intervals along the circumference of the volute 22, and when the volute 22 rotates relative to the outer shell 21, the air outlet 222 of the volute 22 switches between the first air outlet hole 214 and the second air outlet hole 213 of the outer shell 21, and when the air outlet 222 corresponds to the second air outlet hole 213, each second air inlet hole 212 of the outer shell 21 is arranged in one-to-one correspondence with each second air inlet 223 of the volute 22, thereby ensuring that when the position of the air outlet 222 is switched, the second air inlet 223 is effectively connected with the breathing cavity 12 through the second air inlet hole 212, thereby ensuring the smoothness of the air path. In addition, multiple second air inlet holes 212 and multiple second air inlet ports 223 are provided, thereby increasing the air output of the breathing cavity 12, further reducing the resistance of the wearer when exhaling, and further improving the wearer's usage experience.

[0079] It should be pointed out that when the number of the first air inlets 225 and the second air inlets 223 are both plural, the first air inlets 225 and the second air inlets 223 are staggered along the circumference of the volute 22, and when the first air inlets 225 are arranged correspondingly to the first air inlet holes 211, the second air inlets 223 are staggered with the second air inlet holes 212 (the second air inlets 223 and the second air inlet holes 212 are both in a disconnected state); conversely, when the second air inlets 223 are arranged correspondingly to the second air inlet holes 212, the first air inlets 225 are staggered with the first air inlet holes 211 (the first air inlets 225 and the first air inlet holes 211 are both in a disconnected state), and the switching of the air path of the fan 20 is achieved by rotating the volute 22, and further the rapid switching of the air path of the fan 20 is achieved.

[0080] Furthermore, if Figure 1 and Fig.11 As shown, the respirator 100 further includes a filter 30, which cooperates with the mask body 10 and covers the second open end 14. Specifically, the filter 30 is arranged at the second open end 14. When the wearer inhales, the first air path is in an open state, and the external air enters the filter cavity 13 through the filter 30, and then enters the breathing cavity 12 through the first air path. By providing the filter 30, harmful substances can be filtered, thereby ensuring that the wearer can obtain clean air, so that the wearer's health is guaranteed.

[0081] It should be pointed out that the filter element 30 is made of non-woven fabric, etc., and the filter element 30 is used to effectively filter particles of different sizes, such as pollen, PM2.5 fine particles or oily fine particles, further ensuring the health of the wearer.

[0082] Furthermore, if Figure 1 and Fig.11 As shown, the respirator 100 further includes an air valve 40, which is disposed at the exhaust hole 15, and the air valve 40 is a one-way conducting structure from the first air outlet 214 to the outside. Specifically, the air valve 40 is disposed at the exhaust hole 15, and the air valve 40 is a one-way valve structure, which only allows airflow from the first air outlet 214 to the outside, thereby ensuring that the air in the respirator 100 is in a clean state, preventing toxic and harmful gases from entering the human body, and thus ensuring the safety of the wearer.

[0083] Furthermore, the respirator 100 also includes a driving member (not shown), a controller (not shown), an air pressure sensor (not shown) and a power supply (not shown). The driving member is disposed in the housing 21 and is transmission-connected to the volute 22. The driving member is electrically connected to the controller. The air pressure sensor is disposed in the breathing chamber 12 and is electrically connected to the controller. The power supply is electrically connected to the controller. Specifically, the driving member is a second motor and is disposed between the housing 21 and the volute 22. The rotating shaft of the second motor is connected to the volute 22. The rotation of the second motor drives the volute 22 to rotate relative to the housing 21, thereby realizing the corresponding arrangement between the air outlet 222 of the volute 22 and the first air outlet 214 of the housing 21 or the second air outlet 213 of the housing 21, thereby ensuring the effective switching of the air path.

[0084] In addition, the air pressure sensor is arranged in the breathing chamber 12 and is electrically connected to the controller. When the wearer inhales, the volute 22 rotates relative to the outer shell 21, the first air path is connected and the second air path is disconnected, the breathing chamber 12 is connected with the filter chamber 13 through the first air path, and the external air enters the filter chamber 13 through the second opening end 14, and then enters the breathing chamber 12 through the first air path. The rotation of the impeller 23 puts the breathing chamber 12 in a pressurized state, thereby reducing the resistance of the wearer when inhaling. When the wearer exhales, the volute 22 rotates relative to the outer shell 21, the first air path is disconnected and the second air path is connected, the breathing chamber 12 is connected with the exhaust hole 15 through the second air path, and the exhaust gas exhaled by the wearer is discharged to the outside through the second air path and the exhaust hole 15. The rotation of the impeller 23 puts the breathing chamber 12 in a decompressed state, thereby reducing the resistance of the wearer when exhaling, thereby improving the comfort of the wearer during use.

[0085] It should be pointed out that the air pressure sensor detects the air pressure in the exhalation chamber in real time, and the controller adjusts the speed of the impeller 23 according to the current air pressure in the current breathing chamber 12 (the controller is electrically connected to the first motor, and the speed of the impeller 23 is adjusted by adjusting the speed of the first motor). The greater the wearer's inhalation volume, the stronger the effect of reducing the air pressure in the breathing chamber 12 during inhalation. The controller controls to increase the speed of the impeller 23 according to the measured value of the air pressure sensor, thereby providing greater inhalation assistance. On the contrary, the wearer's inhalation volume is small, and the effect of reducing the air pressure in the breathing chamber 12 during inhalation is weak. The controller controls to increase the speed of the impeller 23 according to the measured value of the air pressure sensor. The controller controls the impeller 23 to increase the speed according to the measured value of the air pressure sensor, thereby providing a smaller inhalation assistance; the greater the wearer's exhaled volume, the stronger the effect of increasing the air pressure in the breathing chamber 12 during exhalation. The controller controls the impeller 23 to increase the speed according to the measured value of the air pressure sensor, thereby providing a larger exhalation assistance; conversely, the wearer's exhaled volume is small, and the effect of increasing the air pressure in the breathing chamber 12 during exhalation is weak. The controller controls the impeller 23 to decrease the speed according to the measured value of the air pressure sensor, thereby providing a smaller exhalation assistance, so that the respirator 100 can better meet the use needs of different wearers to improve the wearer's use experience.

[0086] In addition, an air pressure sensor is arranged in the breathing cavity 12 to monitor the air pressure in the breathing cavity 12 in real time and feed back the detected air pressure data to the controller. The controller determines the wearer's breathing rhythm (exhalation state or inhalation state) according to the change of air pressure in the breathing cavity. The controller switches the air path according to the wearer's breathing rhythm, thereby ensuring the wearer's comfort and improving the wearer's usage experience.

[0087] In addition, the above-mentioned respirator is a dust mask or a dust mask, etc. Please refer to the prior art for the structure of other parts of the respirator, which will not be described in detail here.

[0088] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A respirator capable of switching multiple air paths, characterized in that: The respirator comprises: A mask body, wherein the mask body is provided with a first opening end, a second opening end and an exhaust hole, wherein the first opening end is used to abut against the wearer's face, and the second opening end and the exhaust hole are respectively used to communicate with the outside world; A fan, the fan is arranged in the cover body and divides the internal space of the cover body into a breathing chamber and a filtering chamber, the fan is provided with a first air path and a second air path, the first air path is used for the communication between the filtering chamber and the breathing chamber, and the second air path is used for the communication between the breathing chamber and the exhaust hole; a switching mechanism, the switching mechanism being used to connect the first air passage and disconnect the second air passage, or to disconnect the first air passage and connect the second air passage; The switching mechanism comprises: a first wind shielding structure, the first wind shielding structure is arranged corresponding to the first wind path and is used to open or close the first wind path; a second wind shielding structure, the second wind shielding structure is arranged corresponding to the second wind path and is used to open or close the second wind path; The fan comprises: A housing, wherein the housing is provided with a first air outlet, a second air outlet, a first air inlet, and a second air inlet, the first air outlet is connected to the exhaust hole, the second air outlet is connected to the breathing cavity, the first air inlet is connected to the breathing cavity, and the second air inlet is connected to the filter cavity; a volute, the volute being rotatably disposed in the housing, the volute being provided with an air outlet, a first air inlet, and a second air inlet, the second air inlet, the second air inlet, the interior of the volute, and the second air outlet forming the first air path, and the first air inlet, the first air inlet, the interior of the volute, and the first air outlet forming the second air path; an impeller, the impeller being rotatably disposed in the volute; The first wind shielding structure is a first outer surface of the volute facing the first air inlet hole. When the volute rotates relative to the outer shell and the first air inlet is staggered relative to the first air inlet hole, the first outer surface closes the first air inlet hole. When the volute rotates relative to the outer shell and at least part of the first air inlet is arranged corresponding to at least part of the first air inlet hole, the first air inlet is connected to the breathing cavity through the first air inlet hole. There are multiple first air inlets, each of which is arranged at intervals along the circumference of the volute, the number of the first air inlet holes is consistent with the number of the first air inlet holes, and the first air inlet holes are arranged correspondingly to the first air inlet holes; The second wind shielding structure is a second outer surface of the volute facing the second air inlet hole. When the volute rotates relative to the outer shell and the second air inlet is staggered relative to the second air inlet hole, the second outer surface closes the second air inlet hole. When the volute rotates relative to the outer shell and at least part of the second air inlet is arranged corresponding to at least part of the second air inlet hole, the second air inlet is connected to the filter chamber through the second air inlet hole. The respirator further comprises a filter element, which cooperates with the mask body and covers the second open end.

2. The respirator with multiple air path switches according to claim 1, characterized in that: There are multiple second air inlets, each of which is arranged at intervals along the circumference of the volute, the number of the second air inlet holes is consistent with the number of the second air inlet holes, and the second air inlet holes are arranged corresponding to the second air inlets.

3. The respirator with multiple air path switches according to claim 1 or 2, characterized in that: The respirator further comprises an air valve, which is arranged at the exhaust hole and is a one-way conducting structure from the first air outlet to the outside.

4. The respirator with multiple air path switches according to any one of claims 1 to 3, characterized in that: The respirator further comprises: A driving member, the driving member is disposed in the housing and drivingly connected to the volute; A controller, wherein the driving member is electrically connected to the controller; An air pressure sensor, the air pressure sensor is disposed in the breathing cavity and is electrically connected to the controller; A power supply is electrically connected to the controller.

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