A ventilation device

Abstract

Ventilation equipment, including a shell (11), an inhalation branch (16), a control unit (17), a gas source interface (18), an exhalation branch (19) and a paramagnetic oxygen sensor (12). Wherein, the paramagnetic oxygen sensor (12) is used for detecting the oxygen content in the inhalation branch (16), the gas source interface (18) is arranged on the shell (11), the inhalation branch (16), the control unit (17) and the exhalation branch (19) are packaged in the inside of the shell (11), and the paramagnetic oxygen sensor (12) is arranged on the outside of the shell (11).

Description

[0001] This application is a divisional application of Chinese invention patent application filed on August 17, 2018, with application number 201880093627.2, filed by Shenzhen Mindray Bio-Medical Electronics Co., Ltd., and entitled "A Ventilation Device". Technical Field

[0002] This disclosure relates to the field of medical device technology, such as a ventilation device. Background Technology

[0003] Oxygen concentration sensors are an important component of ventilators. Ventilators use oxygen concentration sensors to monitor the oxygen concentration of the mixed gas delivered to the patient. Currently, ventilators mainly use chemical oxygen cells as oxygen concentration sensors.

[0004] Chemical oxygen cells are widely used due to their low cost; however, they consume internal lead during measurement and have a lifespan of only 1-2 years, requiring regular replacement. If chemical oxygen cells are used for too long, exceeding their lifespan, and hospitals fail to replace them on schedule, it may lead to inaccurate oxygen concentration monitoring, potentially posing risks to patients. Furthermore, chemical oxygen cells are usually located inside the ventilator, making maintenance inconvenient. Summary of the Invention

[0005] This disclosure proposes a ventilation device that can improve service life and detection accuracy, avoid risks to patients, and facilitate the maintenance of paramagnetic oxygen sensors.

[0006] To achieve this objective, the present disclosure adopts the following technical solution:

[0007] A ventilation device includes a housing, an air source interface disposed on the housing, and an inhalation branch, an exhalation branch, and a control unit encapsulated inside the housing. The ventilation device also includes a mounting assembly and a paramagnetic oxygen sensor disposed on the outside of the housing via the mounting assembly. The paramagnetic oxygen sensor detects the oxygen content in the inhalation branch.

[0008] In one embodiment, the gas inlet of the paramagnetic oxygen sensor is connected to the intake branch via an adapter or a sampling tube.

[0009] In one embodiment, the adapter pipe and the mounting assembly are integrated into one unit.

[0010] In one embodiment, the ventilation device further includes:

[0011] A buffer structure is provided, at least partially, on the outside of the paramagnetic oxygen sensor.

[0012] In one embodiment, the buffer structure includes:

[0013] A buffer cover is fitted over at least a portion of the outer periphery of the paramagnetic oxygen sensor.

[0014] In one embodiment, the buffer structure includes: a buffer pad;

[0015] The buffer pad can be configured in one of the following ways:

[0016] It is at least partially disposed between the housing and the paramagnetic oxygen sensor;

[0017] At least partially disposed between the intake branch and the paramagnetic oxygen sensor; and

[0018] Part of it is disposed between the housing and the paramagnetic oxygen sensor, and part of it is disposed between the intake branch and the paramagnetic oxygen sensor.

[0019] In one embodiment, the gas inlet of the paramagnetic oxygen sensor is connected to the intake branch via a connector, and the buffer pad is fitted around the outer periphery of the connector.

[0020] In one embodiment, a first mounting groove is provided on the outer periphery of the adapter pipe, and the buffer pad is disposed in the first mounting groove.

[0021] In one embodiment, at least a portion of the outer periphery of the cushioning pad is serrated.

[0022] In one embodiment, the buffer pad has multiple through holes.

[0023] In one embodiment, the buffer structure includes:

[0024] A buffer connector is provided, through which the paramagnetic oxygen sensor is movably connected to the housing.

[0025] In one embodiment, the buffer connector includes a sliding portion, and the paramagnetic oxygen sensor is movable relative to the sliding portion.

[0026] In one embodiment, the ventilation device further includes:

[0027] An anti-misinstallation structure is provided to ensure that the paramagnetic oxygen sensor is installed onto the housing in a predetermined orientation.

[0028] In one embodiment, the ventilation device further includes:

[0029] The shielding structure, in conjunction with the housing, together accommodates the paramagnetic oxygen sensor.

[0030] In one embodiment, the ventilation device further includes an outer cover, the paramagnetic oxygen sensor is disposed inside the outer cover, and the outer cover is connected to the outer shell.

[0031] The ventilation device disclosed herein includes a housing, an inspiratory branch, a control unit, an air supply interface, an expiratory branch, and a paramagnetic oxygen sensor. The paramagnetic oxygen sensor detects the oxygen content in the inspiratory branch. Because the paramagnetic oxygen sensor experiences virtually no wear during measurement, its lifespan is extended, preventing inaccurate detection due to delayed replacement after prolonged use. This ensures the safety of the ventilation device during use and avoids risks to patients. Furthermore, the air supply interface is located on the housing, while the inspiratory branch, control unit, and expiratory branch are encapsulated inside the housing. The paramagnetic oxygen sensor is located on the outside of the housing, allowing the operator to perform maintenance on the paramagnetic oxygen sensor without removing the housing, thus facilitating maintenance. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the ventilation device provided in an embodiment of the present invention;

[0033] Figure 2 This is a simplified internal diagram of the ventilation device provided in an embodiment of the present invention;

[0034] Figure 3 This is an exploded view of the ventilation device provided in one direction according to an embodiment of the present invention;

[0035] Figure 4 This is an exploded view of the ventilation device provided in an embodiment of the present invention from another direction;

[0036] Figure 5 This is a simplified structural diagram of the paramagnetic oxygen sensor provided in an embodiment of the present invention;

[0037] Figure 6 This is a cross-sectional view of the ventilation device provided in an embodiment of the present invention;

[0038] Figure 7 yes Figure 6 A magnified view of a section at point A in the middle;

[0039] Figure 8 This is a schematic diagram of the structure of the buffer connector provided in an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the structure of the paramagnetic oxygen adapter block provided in an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the structure of a paramagnetic oxygen adapter block and a buffer pad provided in an embodiment of the present invention;

[0042] Figure 11 This is a schematic diagram of another paramagnetic oxygen adapter block and buffer pad provided in an embodiment of the present invention;

[0043] Figure 12This is a schematic diagram of the structure of the outer cover provided in an embodiment of the present invention;

[0044] Figure 13 This is a schematic diagram of the structure of the buffer cover provided in an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures

[0046] 1-Ventilation equipment;

[0047] 11-Outer shell; 12-Paramagnetic oxygen sensor; 13-Buffer structure; 15-Outer cover; 16-Inhalation branch; 17-Control unit; 18-Gas source interface; 19-Exhalation branch; 20-Mounting door; 21-Paramagnetic oxygen adapter block;

[0048] 111-Mounting hole; 112-Body; 113-First mounting slot; 122-Paramagnetic oxygen sensor body; 131-Buffer connector; 132-Buffer pad; 133-Buffer cover; 141-First positioning group; 142-Second positioning group; 181-Hook; 182-Hanging slot; 183-First electromagnetic assembly; 184-Second electromagnetic assembly; 211-Adapter pipe;

[0049] 1221-Housing; 1222-First magnetic pole; 1223-Second magnetic pole; 1224-First hollow sphere; 1225-Second hollow sphere; 1226-Metal strip; 1227-Plane mirror; 1228-Photovoltaic cell; 1229-Light source assembly; 1230-Controller; 1231-Amplifier; 1311-Sliding part; 1312-Connector; 1313-Threaded part; 1321-First buffer part; 1322-Second buffer part; 1323-Through hole; 1331-Protrusion; 1411-First positioning post; 1412-First positioning hole; 1421-Second positioning hole; 1422-Third positioning hole; 2111-Second mounting groove;

[0050] 12211 - Air inlet; 12212 - Air outlet; 12213 - Gas passage. Detailed Implementation

[0051] Figure 1 This is a schematic diagram of the ventilation device 1 provided in an embodiment of the present invention. Figure 2 This is a simplified internal diagram of the ventilation device 1 provided in an embodiment of the present invention. Figure 3 This is an exploded view of the ventilation device 1 provided in an embodiment of the present invention in one direction, as shown below. Figures 1-3As shown, the ventilation device 1 provided in this embodiment of the invention includes a housing 11, an inspiratory branch 16, a control unit 17, an air source interface 18, an expiratory branch 19, and a paramagnetic oxygen sensor 12. The paramagnetic oxygen sensor 12 is configured to detect the oxygen content in the inspiratory branch 16. Since the paramagnetic oxygen sensor 12 experiences virtually no wear during measurement, its service life is extended, avoiding inaccurate detection due to delayed replacement after long-term use, thus ensuring the safety of the ventilation device 1 during use and avoiding risks to patients. Furthermore, the air source interface 18 is located on the housing 11, while the inspiratory branch 16, control unit 17, and expiratory branch 19 are encapsulated inside the housing 11. The paramagnetic oxygen sensor 12 is mounted on the outside of the housing 11 via a mounting component, such as screws or clips, allowing the operator to maintain the paramagnetic oxygen sensor 12 without removing the housing 11, facilitating maintenance. The ventilation device 1 provided in this embodiment of the invention can be a ventilator, an anesthesia machine, etc.

[0052] like Figure 2 As shown, in this embodiment of the invention, the air source interface 18 is connected to the inspiratory branch 16, and the inspiratory branch 16 and the expiratory branch 19 are connected to the patient's mouth and nose via a patient tubing. When the patient inhales, the gas introduced from the air source interface 18 is delivered to the patient's mouth and nose through the inspiratory branch 16; when the patient exhales, the exhaled gas is expelled through the expiratory branch 19. The control unit 17 can control the opening and closing of the inspiratory branch 16 and the expiratory branch 19 respectively, so as to realize the normal use of the ventilation device 1.

[0053] The outer side of the outer casing 11 mentioned in the embodiments of the present invention refers to the space area outside the interior where the intake branch 16 is disposed. In one embodiment, such as Figure 1As shown, the housing 11 provided in this embodiment of the invention includes a body 112 and a first mounting groove 113. The paramagnetic oxygen sensor 12 is disposed in the first mounting groove 113, which can effectively reduce the overall size of the ventilation device 1. In addition, the ventilation device 1 provided in this embodiment of the invention also includes a mounting door 20, which covers the opening of the first mounting groove 113. One side of the mounting door 20 is hinged to the body 112, and the other side of the mounting door 20 is provided with a hook 181. The body 112 has a hanging groove 182. When the hook 181 is hung in the hanging groove 182, the mounting door 20 and the body 112 can be locked, thereby covering the paramagnetic oxygen sensor 12 and making the ventilation device 1 more aesthetically pleasing. A first electromagnetic component 183 is provided on the hook 181, and a second electromagnetic component 184 is provided in the hanging groove 182. The first electromagnetic component 183 and the second electromagnetic component 184 are respectively connected to a power source. When at least one of the first electromagnetic component 183 and the second electromagnetic component 184 is energized, the first electromagnetic component 183 and the second electromagnetic component 184 can be attracted together, further improving the stable locking between the mounting door 20 and the body 112. When it is necessary to repair or inspect the paramagnetic oxygen sensor 12, it is only necessary to open the mounting door 20, which is simple and convenient. Of course, a locking structure such as a latch or screw can also be provided between the mounting door 20 and the body 112 of the outer casing 11 so that the mounting door 20 can be locked onto the body 112 after it is closed. In this embodiment of the invention, the outer casing 11 of the ventilation equipment refers to the shell part that needs to be disassembled by maintenance personnel with tools. In one embodiment, the mounting door 20 can also be replaced with other shielding structures to cooperate with the outer casing 11 to accommodate the paramagnetic oxygen sensor 12.

[0054] In one embodiment, the first mounting groove 113 may be provided only on the body 112, and the paramagnetic oxygen sensor 12 may be wholly or partially accommodated in the first mounting groove 113. In another embodiment, the paramagnetic oxygen sensor 12 may be simply disposed on the outer surface of the body 112 without additional mounting door 20, to facilitate the installation of the paramagnetic oxygen sensor 12; alternatively, the paramagnetic oxygen sensor 12 may be directly mounted to the outside of the housing 11 via a mounting assembly, without the first mounting groove 113 and mounting door 20.

[0055] In one embodiment, the mounting door 20 and the body 112 can also be connected by other easy-to-disassemble locking structures, such as hook structures, etc. All easy-to-disassemble locking structures are within the protection scope of this application.

[0056] Figure 4 This is an exploded view of the ventilation device 1 provided in an embodiment of the present invention from another direction. (See image below.) Figure 3 and Figure 4 As shown, the ventilation device 1 provided in this embodiment of the invention also includes a buffer structure 13, an anti-misinstallation structure, and an outer cover 15.

[0057] The following descriptions of each component, in conjunction with other accompanying drawings, illustrate the following:

[0058] Figure 5 This is a simplified structural diagram of the paramagnetic oxygen sensor 12 provided in an embodiment of the present invention. Figure 5As shown, the paramagnetic oxygen sensor 12 provided in this embodiment of the invention includes a paramagnetic oxygen sensor body 122. The paramagnetic oxygen sensor body 122 includes a housing 1221, a first magnetic pole 1222, a second magnetic pole 1223, a first hollow sphere 1224, a second hollow sphere 1225, a metal strip 1226, a plane mirror 1227, a photovoltaic cell 1228, a light source assembly 1229, a controller 1230, and an amplifier 1231. The housing 1221 has an air inlet 12211, an air outlet 12212, and a gas channel 12213. The air inlet 12211 and the air outlet 12212 are located at opposite ends of the gas channel 12213. The magnetic field strength gradients of the first magnetic pole 1222 and the second magnetic pole 1223 are opposite and are disposed inside the housing 1221. A metal strip 1226 is provided on the housing 1221. A first hollow sphere 1224 and a second hollow sphere 1225 of equal volume are positioned in the gas channel 12213 via the metal strip 1226. The first hollow sphere 1224 and the second hollow sphere 1225 are positioned in the gap between the first magnetic pole 1222 and the second magnetic pole 1223. The first hollow sphere 1224 and the second hollow sphere 1225 rotate around the metal strip 1226 but do not swing up and down. A plane reflector 1227 is provided at the intersection of the line connecting the first hollow sphere 1224 and the second hollow sphere 1225 and the metal strip 1226. The controller 1230 uses an amplifier 1231 to cause the light source assembly 1229 to emit light. The emitted light shines on the reflector 1227 and is reflected onto the photovoltaic cell 1228. When the gas to be measured enters the gas channel 12213 through the inlet 12211, the paramagnetic gas molecules (oxygen molecules) contained in the gas are attracted by the magnetic field and move towards it. Due to the attraction of the non-uniform magnetic field to the paramagnetic gas molecules (oxygen molecules), the molecular density is higher in the area near the strong magnetic field, and a pressure difference proportional to the oxygen content is generated along the direction of the magnetic field strength gradient. This pressure difference causes the first hollow sphere 1224 and the second hollow sphere 1225 to be pushed by a force, which causes the first hollow sphere 1224 and the second hollow sphere 1225 to deflect at an angle. At the same time, the plane mirror 1227 also deflects, causing a change in the light received by the photovoltaic cell 1228, thereby generating an electrical signal. This electrical signal is proportional to the angle of deflection of the first hollow sphere 1224 and the second hollow sphere 1225, and proportional to the oxygen content in the gas being measured. Since the paramagnetic oxygen sensor 12 utilizes the physical properties of oxygen, it experiences virtually no wear during measurement. Therefore, the paramagnetic oxygen sensor 12 has a long service life and can be replaced for life during the lifespan of the ventilation equipment 1. This avoids the inaccuracy problem that occurs after long-term use of chemical oxygen batteries, thus improving the safety and reliability of the ventilation equipment 1.

[0059] Since the ventilation device 1 will vibrate when it is working, and the internal structure of the paramagnetic oxygen sensor 12 is a mechanical structure, if the paramagnetic oxygen sensor 12 is directly fixed to the outer shell 11, the first hollow sphere 1224, the second hollow sphere 1225 and the metal strip 1226 inside it will be easily affected, which will lead to inaccurate oxygen concentration measurement, or even damage to the internal structure of the paramagnetic oxygen sensor 12. Figure 6 This is a cross-sectional view of the ventilation device 1 provided in an embodiment of the present invention. Figure 7 yes Figure 6 A magnified view of a portion of point A in the image. (See image below.) Figures 4-7 As shown in the embodiment of the present invention, at least part of the buffer structure 13 is disposed on the outside of the paramagnetic oxygen sensor 12, which can effectively reduce the vibration transmitted to the interior of the paramagnetic oxygen sensor 12, avoid damage to the internal structure of the paramagnetic oxygen sensor 12, and ensure the accuracy of the paramagnetic oxygen sensor 12 in measuring oxygen concentration.

[0060] In one embodiment, such as Figure 7 As shown, the buffer structure 13 includes a buffer connector 131. The paramagnetic oxygen sensor 12 is connected to the housing 11 through the buffer connector 131, ensuring that the paramagnetic oxygen sensor 12 can move relative to the housing 11. Since the paramagnetic oxygen sensor 12 is not completely fixed to the housing 11, there is a certain amount of shaking between the paramagnetic oxygen sensor 12 and the housing 11, which can reduce the direct transmission of vibration to the paramagnetic oxygen sensor 12 and avoid damage to the internal structure of the paramagnetic oxygen sensor 12.

[0061] In one embodiment, Figure 8 This is a schematic diagram of the structure of the buffer connector 131 provided in an embodiment of the present invention. The buffer connector 131 includes a connector head 1312, a sliding part 1311, and a threaded part 1313 connected in sequence. Figure 8 Combination Figure 7 The ventilation device 1 provided in this embodiment of the invention further includes a paramagnetic oxygen adapter block 21, which is movably sleeved on the sliding portion 1311. A buffer connector 131 is fixed to the outer shell 11 via a threaded portion 1313. In the axial direction of the buffer connector 131, the thickness of the paramagnetic oxygen adapter block 21 is less than the distance between the connector 1312 and the outer shell 11, ensuring that the paramagnetic oxygen adapter block 21 is confined to the movement between the connector 1312 and the outer shell 11. Additionally, a connection hole is formed on the paramagnetic oxygen adapter block 21, through which the buffer connector 131 passes. The diameter of the connection hole is larger than the diameter of the sliding portion 1311, thereby ensuring that the paramagnetic oxygen adapter block 21 can move radially relative to the buffer connector 131, realizing the radial movement of the paramagnetic oxygen adapter block 21 relative to the outer shell 11 relative to the buffer connector 131. In one embodiment, the buffer connector 131 and the outer shell 11 can also be fixed together by welding or other methods.

[0062] like Figure 7As shown, there are two buffer connectors 131, and the distance between the axis of the two buffer connectors 131 in different installation positions and the center line of the mounting hole 111 is different. When installing the paramagnetic oxygen adapter block 21, it can play a better role in preventing misinstallation, ensuring that the paramagnetic oxygen sensor 12 is installed in the correct orientation, and realizing the normal use of the paramagnetic oxygen sensor 12. In one embodiment, the number of buffer connectors 131 can also be three, four or more.

[0063] Figure 9 This is a schematic diagram of the structure of the paramagnetic oxygen adapter block 21 provided in an embodiment of the present invention. Figure 10 This is a schematic diagram of the structure of the paramagnetic oxygen adapter block 21 and the buffer pad 132 provided in an embodiment of the present invention. Figure 7 , Figure 9 and Figure 10 As shown, the buffer pad 132 includes a first buffer portion 1321 and a second buffer portion 1322 connected to each other, wherein the first buffer portion 1321 is disposed between the housing 11 and the paramagnetic oxygen sensor 12. On one hand, the first buffer portion 1321 can absorb the paramagnetic oxygen sensor 12 relative to the housing 11 along... Figure 6 Vibrations generated by horizontal movement are absorbed; on the other hand, the first buffer 1321 can absorb vibrations emitted from the housing 11. In one embodiment, the first buffer 1321 can be made of an elastic deformable material such as rubber, which can achieve a constant seal between the housing 11 and the paramagnetic oxygen sensor 12 when the paramagnetic oxygen adapter block 21 moves relative to the housing 11. The second buffer 1322 is disposed between the intake branch 16 and the paramagnetic oxygen sensor 12. On the one hand, the second buffer 1322 can absorb vibrations generated by the paramagnetic oxygen sensor 12 relative to the intake branch 16. Figure 6 The vibration generated by vertical movement; on the other hand, the second buffer 1322 can ensure that the paramagnetic oxygen sensor 12 and the intake branch 16 are always sealed, preventing gas leakage and improving the utilization rate of the ventilation equipment 1.

[0064] In one embodiment, either the first buffer section 1321 or the second buffer section 1322 can be provided alone to achieve the buffering and sealing effect.

[0065] like Figure 9 As shown, the paramagnetic oxygen adapter block 21 provided in this embodiment of the invention includes an adapter tube 211, combined with... Figure 4As shown, the adapter tube 211 can extend into the mounting hole 111 on the housing 11. The adapter tube 211 is connected to the intake branch 16 disposed inside the housing 11, thereby achieving the effect of transmitting gas through the ventilation device 1 to the paramagnetic oxygen sensor 12. In one embodiment, the ventilation device 1 further includes a mounting assembly, which can be used to mount the paramagnetic oxygen sensor 12 onto the housing 11. In this embodiment, the mounting assembly may include the plate of the paramagnetic oxygen adapter block 21 and the buffer connector 131, wherein the plate of the paramagnetic oxygen adapter block 21, the buffer connector 131, and the adapter tube 211 can be integrated into one unit. In one embodiment, the gas inlet of the paramagnetic oxygen sensor 12 can also be connected to the intake branch 16 through a relatively soft sampling tube, which can also achieve the effect of transmitting gas from the intake branch 16 inside the ventilation device 1 to the paramagnetic oxygen sensor 12. By setting the mounting hole 111, the paramagnetic oxygen adapter block 21 and the outer shell 11 can be positioned and installed better, thereby improving the installation efficiency and accuracy of the paramagnetic oxygen sensor 12.

[0066] In this embodiment of the invention, the adapter pipe 211 extends into the interior of the intake branch 16, and the second buffer part 1322 is sleeved on the outer periphery of the adapter pipe 211. The outer periphery of the adapter pipe 211 abuts against the inner peripheral wall of the intake branch 16, thereby achieving a seal between the adapter pipe 211 and the intake branch 16. The adapter pipe 211 provided in this embodiment of the invention has a second mounting groove 2111 on its outer periphery, and the second buffer part 1322 is disposed in the second mounting groove 2111, which can play a better role in the installation and positioning of the second buffer part 1322, preventing the second buffer part 1322 from deviating during the use of the ventilation device 1.

[0067] In this embodiment of the invention, the first buffer portion 1321 and the second buffer portion 1322 can be integrally formed, simplifying the process of assembling the first buffer portion 1321 and the second buffer portion 1322 onto the paramagnetic oxygen adapter block 21 and improving the installation efficiency of the ventilation device 1. In one embodiment, the first buffer portion 1321, the second buffer portion 1322, and the paramagnetic oxygen adapter block 21 can also be integrally formed, further improving the installation efficiency of the ventilation device 1.

[0068] Regarding the second buffer portion 1322, the outer periphery of the second buffer portion 1322 is serrated, which can further improve the compressibility of the buffer pad 132, and further improve the absorption of vibration transmitted by the outer shell 11 through the compression deformation of the second buffer portion 1322. Figure 11 This is a schematic diagram of another paramagnetic oxygen adapter block 21 and buffer pad 132 provided in other embodiments, as shown below. Figure 11As shown, multiple through holes 1323 can also be provided on the second buffer section 1322, which can also improve the compressibility of the second buffer section 1322. In one embodiment, the through holes 1323 extend along the length direction of the adapter pipe 211, which can improve the compressibility of the second buffer section 1322 along the length direction of the adapter pipe 211. Figure 11 The deformation effect in the vertical direction.

[0069] like Figure 4 , 5 As shown in Figure 10, the ventilation device 1 provided in this embodiment of the invention also includes an anti-misinstallation structure. This anti-misinstallation structure enables the paramagnetic oxygen sensor 12 to be installed on the housing 11 in a predetermined direction, ensuring the normal use of the paramagnetic oxygen sensor 12. In one embodiment, the anti-misinstallation structure includes three sets of first positioning groups 141 and two sets of second positioning groups 142. The first positioning group 141 includes a first positioning post 1411 and a first positioning hole 1412. The first positioning post 1411 is disposed on the buffer pad 132, and the first positioning hole 1412 is opened on the housing 11. The second positioning group 142 includes a second positioning hole 1421 and a third positioning hole 1422. The second positioning hole 1421 and the third positioning hole 1422 correspond one-to-one. The second positioning hole 1421 is opened on the paramagnetic oxygen adapter block 21, and the third positioning hole 1422 is opened on the housing 11. When the first positioning post 1411 is inserted into the corresponding first positioning hole 1412, the second positioning hole 1421 and the corresponding third positioning hole 1422 are aligned. The buffer connector 131 passes through the second positioning hole 1421 and the corresponding third positioning hole 1422 in sequence to connect the paramagnetic oxygen sensor 12 and the housing 11. Through the cooperation of the first positioning group 141 and the second positioning group 142, the paramagnetic oxygen sensor 12 is installed on the housing 11 in a predetermined direction. In one embodiment, the first positioning post 1411 can also be provided on the paramagnetic oxygen sensor 12, or simultaneously provided on the paramagnetic oxygen sensor 12 and the buffer pad 132. In one embodiment, the number of groups of the first positioning group 141 can be one, two, or more, and the number of groups of the second positioning group can also be one, three, or more. In addition, the positions of the first positioning post 1411 and the first positioning hole 1412 can be interchanged, and the positions of the second positioning hole 1421 and the third positioning hole 1422 can be interchanged. In one embodiment, the anti-misalignment effect can also be achieved through the combination of shapes. In one embodiment, three sets of first positioning groups 141 can be set. The shapes of the first positioning post 1411 and the first positioning hole 1412 of one set of first positioning groups 141 are different from those of the other two sets, which can play an anti-misalignment effect.

[0070] Figure 12 This is a schematic diagram of the structure of the outer cover 15 provided in an embodiment of the present invention. Figure 7 and Figure 12As shown, the paramagnetic oxygen sensor 12 is disposed inside the outer cover 15, which is fixed to the outer shell 11, thereby protecting the paramagnetic oxygen sensor 12 and preventing external dust from entering its interior, ensuring its normal operation. In one embodiment, the outer cover 15 can be made of metal, which also serves to shield the paramagnetic oxygen sensor 12, ensuring that it is not interfered with by external signals during operation.

[0071] Figure 13 This is a schematic diagram of the structure of the buffer cover 133 provided in an embodiment of the present invention, as shown below. Figure 7 and Figure 13 As shown, the buffer cover 133 is fitted around a portion of the outer periphery of the paramagnetic oxygen sensor 12 and abuts against the outer cover 15. Since the outer cover 15 is fixedly connected to the outer shell 11, vibrations of the outer shell 11 are absorbed by the buffer cover 133 through the outer cover 15, further reducing the vibration experienced by the paramagnetic oxygen sensor 12 and preventing damage to the internal structure of the paramagnetic oxygen sensor 12. In one embodiment, the buffer cover 133 can also completely enclose all the outer peripheral surfaces of the paramagnetic oxygen sensor 12, achieving an even better effect in reducing vibration experienced by the paramagnetic oxygen sensor 12.

[0072] In one embodiment, such as Figure 13 As shown, the outer periphery of the buffer cover 133 is provided with multiple protrusions 1331, thereby achieving a tighter contact between the buffer cover 133 and the outer cover 15, preventing the buffer cover 133 and the outer cover 15 from moving relative to each other, and improving the shock absorption capacity of the buffer cover 133. In addition, the outer cover 15 and the buffer cover 133 can be integrally molded from rubber, which can reduce the assembly steps of the ventilation device 1 and improve the installation efficiency of the ventilation device 1.

[0073] In one embodiment, the outer cover 15 may be omitted and only a buffer cover 133 may be provided. The buffer cover 133 covers at least one side of the paramagnetic oxygen sensor 12 and is connected to the outer shell 11. The buffer cover 133 can absorb some of the vibration transmitted from the outer shell 11 and can also achieve the effect of avoiding damage to the internal structure of the paramagnetic oxygen sensor 12.

Claims

1. A ventilation device, characterized in that, The ventilation device includes a housing, a buffer structure, an air source interface on the housing, and an inspiratory branch, an expiratory branch, and a control unit encapsulated inside the housing. The ventilation device also includes a mounting assembly and a paramagnetic oxygen sensor mounted on the outside of the housing via the mounting assembly. The gas inlet of the paramagnetic oxygen sensor is connected to the inspiratory branch, and the paramagnetic oxygen sensor is used to detect the oxygen content in the inspiratory branch. The buffer structure is used to reduce the vibration transmitted from the housing to the paramagnetic oxygen sensor when the ventilation device is in operation. The buffer structure includes at least one of the following: A buffer connector is provided, through which the paramagnetic oxygen sensor is movably connected to the housing, so that the paramagnetic oxygen sensor can move relative to the housing at least when the ventilation equipment is in operation; A buffer pad is at least partially disposed between the housing and the paramagnetic oxygen sensor, so that the housing and the paramagnetic oxygen sensor do not contact each other, and / or is at least partially disposed between the intake branch and the paramagnetic oxygen sensor, so that the intake branch and the paramagnetic oxygen sensor do not contact each other.

2. The ventilation device according to claim 1, characterized in that, The buffer structure further includes a buffer cover, which is fitted over at least a portion of the outer periphery of the paramagnetic oxygen sensor and connected to the housing.

3. The ventilation device according to claim 1, characterized in that, The housing includes a body and a first mounting slot, the first mounting slot being disposed on the outside of the body, and the paramagnetic oxygen sensor being disposed in the first mounting slot.

4. The ventilation device according to claim 3, characterized in that, The ventilation device also includes a mounting door that covers the opening of the first mounting slot.

5. The ventilation device according to claim 1, characterized in that, The buffer pad includes a first buffer portion disposed between the housing and the paramagnetic oxygen sensor; and / or, the buffer pad includes a second buffer portion disposed between the intake branch and the paramagnetic oxygen sensor.

6. The ventilation device according to claim 2, characterized in that, The outer periphery of the buffer cover is provided with multiple protrusions.

7. The ventilation device according to claim 1, characterized in that, The gas inlet of the paramagnetic oxygen sensor is connected to the intake branch via an adapter or sampling tube.

8. The ventilation device according to claim 7, characterized in that, The adapter pipe and the installation components are integrated into one unit.

9. The ventilation device according to claim 7, characterized in that, The adapter pipe extends into the mounting hole on the housing and connects to the intake branch disposed inside the housing.

10. The ventilation device according to claim 9, characterized in that, The number of buffer connectors is at least two, and the distance between the axis of the buffer connector and the center line of the mounting hole is different for at least two buffer connectors located in different installation positions.

11. The ventilation device according to claim 7, characterized in that, The adapter tube extends into the interior of the intake branch; The buffer pad includes a first buffer portion disposed between the housing and the paramagnetic oxygen sensor; and / or, the buffer pad includes a second buffer portion sleeved on the outer periphery of the adapter tube, the outer periphery of the second buffer portion abutting against the inner peripheral wall of the intake branch.

12. The ventilation device according to claim 11, characterized in that, A second mounting groove is provided on the outer periphery of the transfer pipe, and the second buffer part is disposed in the second mounting groove.

13. The ventilation device according to claim 11, characterized in that, The outer periphery of the second buffer section is serrated; or, the second buffer section is provided with a plurality of through holes, which extend along the length direction of the adapter pipe.

14. The ventilation device according to claim 5 or any one of 11 to 13, characterized in that, The first buffer portion is made of an elastically deformable material; and / or, the first buffer portion and the second buffer portion are integrally formed.

15. The ventilation device according to claim 1, characterized in that, The ventilation device also includes a paramagnetic oxygen adapter block, which includes an adapter pipe. The gas inlet of the paramagnetic oxygen sensor is connected to the intake branch through the adapter pipe, and the buffer pad is sleeved on the outer periphery of the adapter pipe.

16. The ventilation device according to claim 15, characterized in that, The buffer connector includes a sliding part, and the paramagnetic oxygen sensor is movable relative to the sliding part.

17. The ventilation device according to claim 16, characterized in that, The buffer connector also includes a threaded portion, through which the buffer connector is fixed to the housing.

18. The ventilation device according to claim 17, characterized in that, The paramagnetic oxygen adapter block further includes a plate body with a connecting hole. The buffer connector passes through the connecting hole, and the diameter of the connecting hole is larger than the diameter of the sliding part. The buffer connector further includes a connector head. In the axial direction of the buffer connector, the thickness of the plate body is less than the distance between the connector head and the outer shell, so that the paramagnetic oxygen adapter block is confined to move between the connector head and the outer shell.

19. The ventilation device according to any one of claims 1 to 13, or any one of claims 16 to 18, characterized in that, The ventilation equipment also includes: An anti-misinstallation structure is provided to ensure that the paramagnetic oxygen sensor is installed onto the housing in a predetermined orientation.

20. The ventilation device according to claim 19, characterized in that, The ventilation device also includes a paramagnetic oxygen adapter block, which includes an adapter pipe. The gas inlet of the paramagnetic oxygen sensor is connected to the intake branch through the adapter pipe. The anti-misinstallation structure includes at least one first positioning group and at least one second positioning group; The first positioning group includes a first positioning post and a first positioning hole, one of which is disposed on the buffer pad and / or the paramagnetic oxygen sensor, and the other is formed on the housing; The second positioning group includes a second positioning hole and a third positioning hole, which correspond one-to-one. One of the second positioning hole and the third positioning hole is provided on the paramagnetic oxygen adapter block, and the other is provided on the outer shell. The buffer connector passes through the second positioning hole and the third positioning hole in sequence to connect the paramagnetic oxygen sensor and the housing.

21. The ventilation device according to any one of claims 1 to 13, or any one of claims 16 to 18, characterized in that, The ventilation equipment also includes: The shielding structure, in conjunction with the housing, together accommodates the paramagnetic oxygen sensor.

22. The ventilation device according to any one of claims 1 to 13, or any one of claims 16 to 18, characterized in that, The ventilation device also includes an outer cover, the paramagnetic oxygen sensor is disposed inside the outer cover, and the outer cover is connected to the outer shell.

23. The ventilation device according to claim 22, characterized in that, The buffer structure further includes a buffer cover, which is fitted over at least a portion of the outer periphery of the paramagnetic oxygen sensor and connected to the outer casing, and the buffer cover abuts against the outer casing.

24. The ventilation device according to claim 22, characterized in that, The outer casing is made of metal.

25. The ventilation device according to claim 23, characterized in that, The outer cover and the buffer cover are made of rubber as a single piece.

26. A ventilation device, characterized in that, The ventilation device includes a housing, a buffer structure, a gas source interface on the housing, and an inhalation branch, an exhalation branch, and a control unit encapsulated inside the housing. The ventilation device also includes an installation component and a paramagnetic oxygen sensor disposed on the outside of the housing via the installation component. The gas inlet of the paramagnetic oxygen sensor is connected to the inhalation branch, and the paramagnetic oxygen sensor is used to detect the oxygen content in the inhalation branch. The gas inlet of the paramagnetic oxygen sensor is connected to the intake branch via an adapter or sampling tube. The buffer structure is used to reduce the vibration transmitted to the paramagnetic oxygen sensor by the housing when the ventilation device is working.

27. The ventilation device according to claim 26, characterized in that, The adapter pipe extends into the mounting hole on the housing and connects to the intake branch disposed inside the housing.

28. The ventilation device according to claim 27, characterized in that, The ventilation device includes a buffer structure, which includes a buffer connector. The paramagnetic oxygen sensor is movably connected to the housing through the buffer connector, so that the paramagnetic oxygen sensor can move relative to the housing.

29. The ventilation device according to claim 28, characterized in that, The number of buffer connectors is at least two, and the distance between the axis of the buffer connector and the center line of the mounting hole is different for at least two buffer connectors located in different installation positions.

30. The ventilation device according to claim 28, characterized in that, The buffer connector includes a sliding part, and the paramagnetic oxygen sensor is movable relative to the sliding part.

31. The ventilation device according to claim 30, characterized in that, The ventilation device further includes a paramagnetic oxygen adapter block, which includes the adapter tube and a plate. The plate has a connection hole through which the buffer connector passes. The diameter of the connection hole is larger than the diameter of the sliding part. The buffer connector also includes a connector head. In the axial direction of the buffer connector, the thickness of the plate is less than the distance between the connector head and the outer shell, so that the paramagnetic oxygen adapter block is confined to move between the connector head and the outer shell.

32. The ventilation device according to claim 26, characterized in that, The adapter tube extends into the interior of the intake branch; The ventilation device includes a buffer structure, which includes a buffer pad. The buffer pad includes a first buffer portion disposed between the housing and the paramagnetic oxygen sensor; and / or, the buffer pad includes a second buffer portion sleeved on the outer periphery of the adapter tube, the outer periphery of the second buffer portion abutting against the inner peripheral wall of the intake branch.

33. The ventilation device according to claim 32, characterized in that, A second mounting groove is provided on the outer periphery of the transfer pipe, and the second buffer part is disposed in the second mounting groove.

34. The ventilation device according to claim 32, characterized in that, The outer periphery of the second buffer section is serrated; or, the second buffer section is provided with a plurality of through holes, which extend along the length direction of the adapter pipe.

35. The ventilation device according to any one of claims 32 to 34, characterized in that, The first buffer portion is made of an elastically deformable material; and / or, the first buffer portion and the second buffer portion are integrally formed.

36. The ventilation device according to claim 26, characterized in that, The ventilation device includes a buffer structure, which includes a buffer cover that is fitted over at least a portion of the outer periphery of the paramagnetic oxygen sensor.

37. The ventilation device according to claim 26, characterized in that, The ventilation device also includes an outer cover, the paramagnetic oxygen sensor is disposed inside the outer cover, and the outer cover is connected to the outer shell.

38. The ventilation device according to claim 26, characterized in that, The housing includes a body and a first mounting slot, the first mounting slot being disposed on the outside of the body, and the paramagnetic oxygen sensor being disposed in the first mounting slot.

39. The ventilation device according to claim 38, characterized in that, The ventilation device also includes a mounting door that covers the opening of the first mounting slot.

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