A head-mounted ventilator

Abstract

The present invention relates to the technical field of ventilators, and in particular to a head-mounted ventilator. The head-mounted ventilator comprises a main unit, a connecting tube and a mask, wherein the mask is used to cover the user's face, and the connecting tube is used to connect the main unit and the mask. The main unit comprises a shell, a headband and a blower, and the blower is connected to the connecting tube. In the past, the connecting tube transported airflow, and the headband was connected to the shell. The headband was used to wear the shell on the top of the user's head so that when the user changes his posture, the main unit can also move with the change of the user's posture. Therefore, the connecting tube of the present invention can be set relatively short and does not need to be set as long as in the prior art. After wearing the head-mounted ventilator shown by the present invention, no matter how the user turns over during sleep, the connecting tube is not easily pressed by the user, thereby ensuring that the head-mounted ventilator can operate stably during the user's sleep.

Description

Technical Field

[0001] The present invention relates to the field of ventilators, in particular to a head-mounted ventilator. Background Art

[0002] A ventilator is a machine that is worn on the patient's face while sleeping. It can prevent snoring, apnea and other conditions, thereby improving sleep quality. More and more families are starting to be equipped with ventilators.

[0003] A ventilator on the market typically consists of a main unit, a connecting tube, and a mask. To use it, simply place the main unit next to your bed and turn it on. Once the main unit is turned on, the internal fan rotates, generating airflow. The connecting tube connects the main unit to the mask, allowing airflow to flow through the tube.

[0004] Since the host is set next to the bed and the user changes posture many times when sleeping, in order to avoid being restricted by the length of the connecting tube when the user changes posture, the existing technology will set the connecting tube to be relatively long, which also makes it easy for the user to press the connecting tube when changing posture. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a head-mounted ventilator to solve the problem in the prior art that the user is prone to pressurizing the connecting tube when using the ventilator.

[0006] The head-mounted respirator provided in an embodiment of the present invention includes: a main unit, which includes a shell, a headband and a fan; the shell is provided with a first air inlet and a first air outlet; the headband is connected to the shell, and the headband is used to install the shell on the top of the user's head; the fan is installed in the shell, and the fan includes a second air inlet and a second air outlet, the second air inlet is connected to the first air inlet, and the second air outlet is connected to the first air outlet; a connecting tube, one end of which is installed at the first air outlet; a mask, which is used to cover the user's face, and the other end of the connecting tube is installed on the mask.

[0007] Optionally, an air inlet cavity is provided inside the shell, and the first air inlet and the second air inlet are both connected to the air inlet cavity to form an air inlet flow channel in the air inlet cavity. A first air inlet guide plate is provided in the air inlet cavity, and the first air inlet guide plate is partially blocked in the air inlet flow channel so that the air inlet flow channel has at least one bend.

[0008] Optionally, the first air inlet is connected to one side of the air inlet cavity in the first direction, and the second air inlet is connected to the other side of the air inlet cavity in the first direction, and the air inlet cavity includes a first cavity wall and a second cavity wall spaced apart in the second direction, and the second direction is perpendicular to the first direction; a second air inlet guide plate and a third air inlet guide plate are also provided in the air inlet cavity, and the second air inlet guide plate is arranged between the first air inlet guide plate and the third air inlet guide plate in the first direction, and the first air inlet guide plate and the third air inlet guide plate are both connected to the first cavity wall and extend toward the second cavity wall, and the second air inlet guide plate is connected to the second cavity wall and extends toward the first cavity wall, so that the air inlet flow channel has multiple bends.

[0009] Optionally, a C-shaped baffle is further provided in the air inlet cavity, and the C-shaped baffle is arranged toward the first cavity wall and is located between the second air inlet guide plate and the third air inlet guide plate.

[0010] Optionally, a spider web structure is provided in the first air outlet.

[0011] Optionally, the host also includes a main control module and a flow sensor. A hole is provided on the inner wall of the first air outlet. The flow sensor is installed on the side of the inner wall away from the hole of the first air outlet. The flow sensor is electrically connected to the main control module so that the main control module can adjust the fan speed according to the feedback information of the flow sensor.

[0012] Optionally, the flow sensor is a differential pressure sensor, and the hole position includes a first through hole and a second through hole, the first through hole is located on the side of the spider web structure close to the second air outlet, and the second through hole is located on the side of the spider web structure away from the second air outlet.

[0013] Optionally, the bottom of the shell has a curved surface.

[0014] Optionally, the host also includes a main control module, which is arranged in the shell and electrically connected to the fan; a control key is provided on the mask, and the control key is connected to the main control module through a conductor or wirelessly, so that the main control module can adjust the fan according to the feedback information of the control key.

[0015] Optionally, the fan is a turbine fan, which includes an air collecting shell, a brushless DC motor and an impeller. The second air inlet and the second air outlet are both arranged on the air collecting shell, the impeller is installed in the air collecting shell, and the brushless DC motor is connected to the impeller to drive the impeller to rotate.

[0016] Compared with the prior art, the beneficial effect of the head-mounted respirator provided by the embodiment of the present invention is that: when the head-mounted respirator of the embodiment of the present invention is in use, the main unit of the head-mounted respirator is installed on the top of the user's head through a headband, so when the user changes his posture, the main unit will also move with the change of the user's posture. Therefore, the connecting tube of this embodiment can be set relatively short and does not need to be as long as that set in the prior art. After wearing the head-mounted respirator of the embodiment of the present invention, no matter how the user turns over during sleep, the connecting tube is not easily pressed by the user, thereby ensuring that the head-mounted respirator can operate stably during the user's sleep. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 is a three-dimensional schematic diagram of a host provided by an embodiment of the present invention;

[0019] Figure 2 is a planar schematic diagram of a host provided by an embodiment of the present invention;

[0020] Figure 3 1 is a schematic plan view of a head-mounted ventilator provided in an embodiment of the present invention;

[0021] Figure 4 This is a schematic structural diagram of a host provided by an embodiment of the present invention with part of the housing omitted;

[0022] Figure 5 is a three-dimensional schematic diagram of an air collecting housing provided by an embodiment of the present invention;

[0023] Figure 6 is a three-dimensional schematic diagram of an air guide housing provided by an embodiment of the present invention;

[0024] Figure 7 It is a three-dimensional schematic diagram of a partial structure of a host provided by an embodiment of the present invention;

[0025] Figure 8 yes Figure 7 A partial enlarged schematic diagram of position A in the middle;

[0026] Figure 9 yes Figure 7 A three-dimensional schematic diagram of the structure shown from another angle;

[0027] Figure 10 yes Figure 9 A partial enlarged schematic diagram of position B in the middle;

[0028] Figure 11 It is a three-dimensional schematic diagram of a partial structure of a shell provided by an embodiment of the present invention.

[0029] The reference numerals in the figures are:

[0030] 1000, head-mounted ventilator;

[0031] 100, host; 110, housing; 111, first air inlet; 112, first air outlet; 1121, spiderweb-like structure; 1122, hole position; 11221, first through hole; 11222, second through hole; 1123, third through hole; 113, front face; 114, curved surface; 120, headband; 130, fan; 131, second air inlet; 132, second air outlet; 133 , air collecting housing; 140, air guide housing; 141, air inlet cavity; 1411, air inlet flow channel; 1412, first cavity wall; 1413, second cavity wall; 142, first air inlet guide plate; 143, second air inlet guide plate; 144, third air inlet guide plate; 145, C-shaped baffle; 150, main control module; 160, flow sensor; 170, air pressure sensor; 180, chamber; 181, opening;

[0032] 200, connecting pipe;

[0033] 300, mask; 310, control key. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.

[0035] The embodiment of the present invention provides a head-mounted ventilator 1000, such as Figure 1-Figure 5 As shown, the head-mounted ventilator 1000 includes a main unit 100, a connecting tube 200, and a mask 300. The connecting tube 200 is used to connect the main unit 100 and the mask 300. The main unit 100 includes a housing 110, a headband 120, and a blower 130. The blower 130 is installed inside the housing 110. The headband is connected to the housing 110. The headband 120 is used to wear the housing 110 on the user's head.

[0036] Specifically, the housing 110 is provided with a first air inlet 111 and a first air outlet 112. The fan 130 includes a second air inlet 131 and a second air outlet 132. The first air inlet 111 and the second air inlet 131 are connected so that when the fan 130 is in operation, air can be taken in through the first air inlet 111 and the second air inlet 131. The second air outlet 132 is connected to the first air outlet 112 so that the airflow generated by the fan 130 in operation can sequentially pass through the second air outlet 132 and the first air outlet 112 before being discharged from the housing 110. One end of the connecting tube 200 is mounted at the first air outlet 112 so that the airflow generated by the fan 130 in operation can enter the connecting tube 200. The other end of the connecting tube 200 is mounted on the mask 300 so that the airflow entering the connecting tube 200 can enter the mask 300 that is placed on the user's face.

[0037] In this embodiment, when the head-mounted ventilator 1000 is in use, the main unit 100 is mounted on the user's head, rather than being placed on the bedside as in the prior art. Therefore, when the user changes posture, the main unit 100 also moves with the user's posture. Therefore, the connecting tube 200 of this embodiment can be relatively short, unlike the conventional arrangement. When wearing the head-mounted ventilator 1000 of this embodiment, no matter how the user turns over during sleep, the connecting tube 200 is unlikely to be pressed by the user, ensuring stable operation of the head-mounted ventilator 1000 during sleep.

[0038] refer to Figure 2 、 Figure 3 In a specific embodiment, the first air outlet 112 is arranged at a position near the front face 113 at the bottom of the shell 110 to prevent the connecting tube 200 from being pressed when the user flips it over. Compared with setting the first air outlet 112 at other positions of the shell 110, the connecting tube 200 of this embodiment can be designed to be shorter and looks more beautiful.

[0039] In some embodiments, the first air outlet 112 is provided at the top of the housing 110, and the connecting tube 200 is routed down from the front surface 113 of the housing 110 to prevent the connecting tube 200 from being pressed when the user turns the housing 110. In some embodiments, the first air outlet 112 can also be provided at the front surface 113 of the housing 110 to prevent the connecting tube 200 from being pressed when the user turns the housing 110.

[0040] refer to Figure 1 In some embodiments, the bottom of the housing 110 has a curved surface 114 .

[0041] Specifically, the contour of the user's head is arc-shaped, and providing an arc-shaped surface 114 at the bottom of the shell 110 can better adapt to the contour of the user's head and improve the comfort of the user when wearing the head-mounted respirator 1000.

[0042] In a specific embodiment, a soft cushion (not shown in the figure) is provided on the curved surface 114, so that when the shell 110 is worn on the top of the user's head, it will not make hard contact with the top of the user's head, thereby improving the comfort of the user when wearing the head-mounted respirator 1000.

[0043] refer to Figure 4 、 Figure 6 In some embodiments, an air inlet cavity 141 is provided inside the housing 110. The first air inlet 111 and the second air inlet 131 are both connected to the air inlet cavity 141 to form an air inlet channel 1411 in the air inlet cavity 141. A first air inlet guide plate 142 is provided in the air inlet cavity 141. The first air inlet guide plate 142 is partially blocked in the air inlet channel 1411 so that the air inlet channel 1411 has at least one bend (see FIG. Figure 6 O position in the ).

[0044] Specifically, the presence of the first air inlet guide plate 142 can increase the complexity of the air inlet flow channel 1411. Firstly, increasing the complexity of the air inlet flow channel 1411 can provide more damping to the gas flow. This damping can reduce turbulence and eddies generated during gas flow, thereby reducing noise generation and, in turn, reducing the noise generated during operation of the host 100. Secondly, increasing the complexity of the air inlet flow channel 1411 can provide more sound insulation, reducing the ability of sound waves to propagate within the head-mounted ventilator 1000, thereby reducing the noise generated during operation of the host 100.

[0045] Since the head-mounted respirator 1000 is intended for use while the user sleeps, the operating noise of the head-mounted respirator 1000 must be sufficiently low to avoid disturbing the user's sleep. Conventional head-mounted respirators 1000 generate relatively high noise levels during operation, requiring their placement relatively far from the user to minimize any negative impact. In contrast, this embodiment utilizes the provision of a first air inlet guide plate 142, which creates at least one bend in the air inlet flow channel 1411. This reduces the noise generated by the main unit 100 during operation, ensuring that the main unit 100 does not disturb the user's sleep even when worn directly on the user's head. When the main unit 100 is worn on the user's head, the main unit 100 will also move with the user's posture. Therefore, the connecting tube 200 of the present invention can be relatively short, unlike conventional designs. When the user turns over and over while wearing the head-mounted respirator 1000 of this embodiment, the connecting tube 200 is unlikely to be compressed by the user, ensuring stable operation of the head-mounted respirator 1000 during sleep.

[0046] refer to Figure 6 In a specific embodiment, the first air inlet 111 is connected to the air inlet cavity 141 in the first direction (refer to Figure 6 X direction in the side (reference Figure 6 The second air inlet 131 is connected to the other side of the air inlet cavity 141 in the first direction (reference Figure 6 N position in the middle), the air inlet cavity 141 includes a second direction (reference Figure 6 A first cavity wall 1412 and a second cavity wall 1413 are spaced apart in the Y direction (in the Y direction), with the second direction being perpendicular to the first direction. A second air inlet guide plate 143 and a third air inlet guide plate 144 are also provided within the air inlet cavity 141. The second air inlet guide plate 143 is provided between the first and third air inlet guide plates 142, 144 in the first direction. Both the first and third air inlet guide plates 142, 144 are connected to the first cavity wall 1412 and extend toward the second cavity wall 1413. The second air inlet guide plate 143 is connected to the second cavity wall 1413 and extends toward the first cavity wall 1412, thereby providing the air inlet flow path 1411 with multiple bends.

[0047] Specifically, when the fan 130 is running, the outside air will first enter from the first air inlet 111 and move to the position where the air inlet cavity 141 is connected to the first air inlet 111; after entering the air inlet cavity 141, the airflow will be blocked by the first air inlet guide plate 142, so that the airflow needs to bypass the first air inlet guide plate 142 before it can continue to flow toward the fan 130; after the airflow bypasses the first air inlet guide plate 142, it will be blocked by the second air inlet guide plate 143, so that the airflow needs to bypass the second air inlet guide plate 143 before it can continue to flow toward the fan 130; after the airflow bypasses the second air inlet guide plate 143, it will be blocked by the third air inlet guide plate 144, and the airflow needs to flow from the area formed between the third air inlet guide plate 144 and the second cavity wall 1413 (refer to Figure 6 The air can only flow to the position where the air inlet cavity 141 is connected to the second air inlet 131 when it is free from the constraint of the third air inlet guide plate 144.

[0048] Thus, the addition of the second and third air inlet guide plates 143, 144 in this embodiment can increase the complexity of the air inlet duct 1411. Firstly, increasing the complexity of the air inlet duct 1411 can provide more damping to the gas flow, which can reduce turbulence and eddies generated during gas flow, thereby reducing noise generation and, consequently, reducing the noise generated during operation of the main unit 100. Secondly, increasing the complexity of the air inlet duct 1411 can provide more sound insulation, reducing the ability of sound waves to propagate within the head-mounted ventilator 1000, thereby reducing the noise generated during operation of the main unit 100.

[0049] refer to Figure 6In this embodiment, the air inlet cavity 141 further includes a C-shaped baffle 145, which is positioned toward the first cavity wall 1412 and between the second air inlet guide plate 143 and the third air inlet guide plate 144. The presence of the C-shaped baffle 145 further increases the complexity of the air inlet flow path 1411, thereby further reducing the noise generated by the operation of the host 100. According to actual measurements, the decibel level of the host 100 in this embodiment is less than or equal to 26 during operation, which does not affect the user's rest and ensures a good sleeping environment.

[0050] refer to Figure 4 、 Figure 6 In some embodiments, the host 100 further includes an air guide shell 140 , which is installed in the housing 110 , and the air inlet cavity 141 is disposed in the air guide shell 140 .

[0051] Specifically, due to the complex internal structure of the air inlet cavity 141, directly molding the air inlet cavity 141 on the housing 110 would significantly increase the complexity of the housing 110, increase the difficulty in manufacturing the housing 110, and reduce the yield rate. To address this technical problem, this embodiment adds an air guide housing 140 and disposes the air inlet cavity 141 within the air guide housing 140, thereby achieving the technical effect of reducing the difficulty in manufacturing the housing 110 and improving the yield rate of the housing 110.

[0052] refer to Figure 7-10 In some embodiments, a spider web-like structure 1121 is provided within the first air outlet 112. This structure can provide increased damping to the air flow, thereby reducing the noise generated by airflow through the first air outlet 112 and helping to prevent noise from disturbing the user's sleep. Furthermore, the spider web-like structure 1121 can increase the structural strength of the first air outlet 112.

[0053] refer to Figure 7-10 In a specific embodiment, the host 100 further includes a main control module 150 and a flow sensor 160. A hole 1122 is opened on the inner wall of the first air outlet 112. The flow sensor 160 is installed on a side of the inner wall away from the hole of the first air outlet 112. The flow sensor 160 is electrically connected to the main control module 150 so that the main control module 150 can adjust the speed of the fan 130 according to the feedback information of the flow sensor 160.

[0054] By implementing this embodiment, flow rate can be more intelligently and precisely controlled. Specifically, the flow rate information detected by flow sensor 160 is used to control the speed of fan 130, so that the flow rate can be stably maintained within a preset range, ensuring user comfort. More specifically, when the flow rate information is detected to be below the preset range, main control module 150 can control fan 130 to increase its speed. When the flow rate information is detected to be above the preset range, main control module 150 can control fan 130 to decrease its speed.

[0055] refer to Figure 7-10 In a specific embodiment, the flow sensor 160 is a differential pressure sensor, and the hole position 1122 includes a first through hole 11221 and a second through hole 11222. The first through hole 11221 is located on a side of the spider web structure 1121 close to the second air outlet 132, and the second through hole 11222 is located on a side of the spider web structure 1121 away from the second air outlet 132.

[0056] Specifically, when air flows through spider web structure 1121, the flow rate and static pressure change, creating a pressure differential between the front and rear sides of spider web structure 1121. A greater flow rate creates a greater pressure differential, allowing the flow rate to be measured based on the pressure differential. Therefore, in this embodiment, a first through-hole 11221 is provided on the side of spider web structure 1121 near second air outlet 132, and a second through-hole 11222 is provided on the side of spider web structure 1121 away from second air outlet 132. This allows a pressure differential sensor to measure the flow rate based on the pressure differential.

[0057] refer to Figure 7-10 In some embodiments, the host 100 further includes a main control module 150 and an air pressure sensor 170. A third through hole 1123 is provided on the inner wall of the first air outlet 112. The air pressure sensor 170 is disposed at the end of the third through hole 1123. The air pressure sensor 170 is electrically connected to the main control module 150 so that the main control module 150 can adjust the speed of the fan 130 according to feedback information from the air pressure sensor 170.

[0058] By implementing this embodiment, air pressure can be more intelligently and precisely controlled. Specifically, the air pressure information detected by air pressure sensor 170 is used to control the speed of fan 130, so that the air pressure can be stably maintained within a preset range, ensuring user comfort. More specifically, when the air pressure information is detected to be below the preset range, main control module 150 can control fan 130 to increase its speed. When the air pressure information is detected to be above the preset range, main control module 150 can control fan 130 to decrease its speed.

[0059] refer to Figure 3 、 Figure 7In some embodiments, the host 100 further includes a main control module 150, which is disposed in the housing 110 and electrically connected to the fan 130. A control key 310 is provided on the mask 300, and the control key 310 is connected to the main control module 150 through a conductor (not shown in the figure) or wirelessly connected, so that the main control module 150 can adjust the fan 130 according to feedback information from the control key 310.

[0060] Specifically, setting the control key 310 on the mask 300 can facilitate the user to operate the control key 310, and the user experience is better. For example, the control key 310 can be used to adjust the operating mode, adjust the pressure, start the head-mounted respirator 1000, turn off the head-mounted respirator 1000, etc., which is not limited to this embodiment. In order to enable information to be transmitted to the main control module 150 when the control key 310 is triggered, the control key 310 can be connected to the main control module 150 by wired connection, so that the information transmission between the control key 310 and the main control module 150 will be very stable; optionally, the control key 310 can also be connected to the main control module 150 by wireless connection, which can avoid messy cables from being exposed to the head-mounted respirator 1000 and can provide a neater use environment.

[0061] refer to Figure 4 、 Figure 5 In a specific embodiment, the fan 130 is a turbine fan 130, which includes an air collecting housing 133, a brushless DC motor (not shown in the figure) and an impeller (not shown in the figure). The second air inlet 131 and the second air outlet 132 are both arranged on the air collecting housing 133, the impeller is installed in the air collecting housing 133, and the brushless DC motor is connected to the impeller, and the brushless DC motor is used to drive the impeller to rotate.

[0062] First, since the host 100 of the present application is worn on the top of the user's head, the size of the host 100 should be reduced as much as possible, and the turbine fan 130 can provide a larger air volume in a limited space. The use of the turbine fan 130 is conducive to the miniaturization of the host 100.

[0063] Secondly, the brushless DC motor has the characteristic of low noise. The use of the brushless DC motor as a power source for the turbine fan 130 is conducive to reducing the noise generated when the host 100 is running.

[0064] In some embodiments, a chamber 180 is further provided in the shell 110, and the air inlet chamber 141 is connected to the chamber 180. An opening 181 is provided on the wall of the chamber 180, and the opening 181 is connected to the space where the second air inlet 131 is located. The wind entering the air inlet chamber 141 first flows through the chamber 180, and then flows through the space where the second air inlet 131 is located through the opening 181, and then flows into the fan through the second air inlet 131.

[0065] In some embodiments, the connecting tube 200 is detachably connected to the first air outlet 112. This facilitates the removal of the connecting tube 200 and the mask 300 for cleaning. This also facilitates repair of damaged components when the main unit 100, the connecting tube 200, or the mask 300 is damaged. For example, the connecting tube 200 and the housing 110 can be detachably connected using a snap-fit ​​connection, a screw connection, or other methods, which are not limited in this embodiment.

[0066] In a specific embodiment, the connecting tube 200 is detachably connected to the mask 300, and the shapes of the two ends of the connecting tube 200 are the same, so that both ends of the connecting tube 200 can be assembled at the first air outlet 112 and on the mask 300 without distinguishing the assembly direction, which is convenient for users to assemble.

[0067] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A head-mounted ventilator, characterized in that: include: The host comprises a housing, a headband and a fan; the housing is provided with a first air inlet and a first air outlet; The headband is connected to the shell, and the headband is used to wear the shell on the top of the user's head; the fan is installed in the shell, and the fan includes a second air inlet and a second air outlet, the second air inlet is connected to the first air inlet, and the second air outlet is connected to the first air outlet; an air inlet cavity is provided inside the shell, and the first air inlet and the second air inlet are both connected to the air inlet cavity to form an air inlet flow path in the air inlet cavity, and a first air inlet guide plate is provided in the air inlet cavity, and the first air inlet guide plate is partially blocked in the air inlet flow path so that the air inlet flow path has at least one bend; the first air inlet is connected to one side of the air inlet cavity in the first direction, and the second air inlet is connected to the other side of the air inlet cavity in the first direction, and the air inlet cavity includes vents arranged at intervals in the second direction The first cavity wall and the second cavity wall, the second direction is perpendicular to the first direction; a second air inlet guide plate and a third air inlet guide plate are further provided in the air inlet cavity, the second air inlet guide plate is arranged between the first air inlet guide plate and the third air inlet guide plate in the first direction, the first air inlet guide plate and the third air inlet guide plate are both connected to the first cavity wall and extend toward the second cavity wall, the second air inlet guide plate is connected to the second cavity wall and extends toward the first cavity wall, so that the air inlet flow path has multiple bends; a C-shaped baffle is further provided in the air inlet cavity, the C-shaped baffle is arranged toward the first cavity wall, and is located between the second air inlet guide plate and the third air inlet guide plate; the main unit also includes an air guide shell, the air guide shell is installed in the shell, and the air inlet cavity is arranged in the air guide shell; a connecting pipe, one end of which is mounted at the first air outlet; The face mask is used to cover the face of the user, and the other end of the connecting tube is installed on the face mask.

2. The head-mounted respirator according to claim 1, wherein: A spider web structure is provided in the first air outlet.

3. The head-mounted respirator according to claim 2, wherein: The host also includes a main control module and a flow sensor. A hole is opened on the inner wall of the first air outlet. The flow sensor is installed on the side of the inner wall away from the hole of the first air outlet. The flow sensor is electrically connected to the main control module so that the main control module can adjust the fan speed according to the feedback information of the flow sensor.

4. The head-mounted respirator according to claim 3, wherein: The flow sensor is a differential pressure sensor, and the hole positions include a first through hole and a second through hole. The first through hole is located on a side of the spider web structure close to the second air outlet, and the second through hole is located on a side of the spider web structure away from the second air outlet.

5. The head-mounted respirator according to any one of claims 1 to 4, characterized in that: The bottom of the shell has a curved surface.

6. The head-mounted respirator according to any one of claims 1 to 4, characterized in that: The host also includes a main control module, which is arranged in the shell and electrically connected to the fan; a control key is provided on the mask, and the control key is connected to the main control module through a conductor or wirelessly, so that the main control module can adjust the fan according to the feedback information of the control key.

7. The head-mounted respirator according to any one of claims 1 to 4, characterized in that: The fan is a turbine fan, which includes an air collecting housing, a brushless DC motor and an impeller. The second air inlet and the second air outlet are both arranged on the air collecting housing. The impeller is installed in the air collecting housing. The brushless DC motor is connected to the impeller to drive the impeller to rotate.

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