Ball valve vent

Abstract

The embodiment of the application relates to a ball valve type ventilation device, comprising: a valve core in a spherical structure, a T-shaped flow channel being arranged in the valve core, the T-shaped flow channel comprising a first flow channel and a second flow channel in communication, and the first flow channel being arranged along the axial direction of the valve core; a valve body, an X-direction channel, a Y-direction channel and a Z-direction channel being arranged in the valve body in communication, a spherical accommodating cavity being formed at the intersection of the X-direction channel, the Y-direction channel and the Z-direction channel; a first end of the X-direction channel being used for connecting an external air source, and a second end being blocked; a first end of the Y-direction channel being used for communicating with an external environment, and a second end being used for connecting a ventilation component; the Z-direction channel being configured for transmission connection of the valve core and an external driving device; wherein the valve core is rotatably accommodated in the accommodating cavity, and the valve core is controlled to rotate to adjust the rotation angle, and the first flow channel and the second flow channel of the T-shaped flow channel and the X-direction channel, the Y-direction channel of the valve body form selective communication, and switching of a ventilation path is realized.

Description

Technical Field

[0001] This application relates to the field of ventilation testing technology, and in particular to a ball valve type ventilation device. Background Technology

[0002] In fields such as medical ventilation, gas transport testing, and laboratory gas exchange simulation, ventilation devices are core equipment for achieving directional gas flow and path switching. Their structural rationality directly affects ventilation efficiency, scenario adaptability, and ease of operation. Currently, existing ventilation devices mainly suffer from the following technical deficiencies:

[0003] Traditional ventilation devices, to achieve multi-path switching between "air source-ventilation component" and "ventilation component-external environment," typically require multiple independent valves (such as solenoid valves and check valves) connected in series within the piping, forming different flow paths through complex piping connections. This structure not only results in a bulky device and cumbersome assembly processes, but also necessitates the simultaneous control of the opening and closing of multiple valves to achieve path switching, leading to high operational complexity. Furthermore, the connection points of multiple valves and pipelines are prone to gas leakage, reducing ventilation accuracy and efficiency. For example, in medical respiratory ventilation scenarios, existing devices require 3-4 sets of valves to coordinate the switching between inspiratory and expiratory paths, increasing equipment costs and potentially causing airflow turbulence due to asynchronous valve responses.

[0004] Existing ventilation devices are mostly designed for single application scenarios (such as only suitable for routine ventilation or only suitable for pressure testing). If they need to be expanded to other scenarios, the core pipelines and valve core structures need to be significantly modified. For example, if a device used for routine ventilation needs to add a gas exchange testing function, it is necessary to weld additional test pipelines and sealing cavities, which not only damages the original structural integrity of the device, but also increases maintenance costs.

[0005] In summary, existing ventilation devices suffer from problems such as structural redundancy, poor sealing, low adaptability to different scenarios, and limited functional expandability. Utility Model Content

[0006] One object of this application is to provide a ball valve type ventilation device that at least solves the above-mentioned problems.

[0007] To achieve the above objectives, some embodiments of this application provide a ball valve type ventilation device, comprising:

[0008] The valve core has a spherical structure and a T-shaped flow channel inside. The T-shaped flow channel includes a first flow channel and a second flow channel that are connected to each other, and the first flow channel is arranged to pass through the valve core along the axial direction.

[0009] The valve body has through-flow, perpendicularly connected X-direction, Y-direction, and Z-direction channels, and the intersection of the X-direction, Y-direction, and Z-direction channels forms a spherical receiving cavity; the first end of the X-direction channel is used to connect to an external air source, and the second end is blocked; the first end of the Y-direction channel is used to connect to the external environment, and the second end is used to connect to a venting component; the Z-direction channel is configured to provide a transmission connection between the valve core and an external drive device.

[0010] The valve core is rotatably housed within the receiving cavity, and its rotation is controlled to adjust its rotation angle. It selectively connects with the X-direction channel and Y-direction channel of the valve body through the first and second channels of the T-shaped flow channel, thereby achieving the switching of the ventilation path.

[0011] Compared with related technologies, the solution provided in this application, through the cooperation of the T-shaped flow channel (first flow channel and second flow channel) inside the valve core with the three vertical channels of the valve body (X-direction channel (air source connection), Y-direction channel (environment / ventilation component connection), and Z-direction channel (transmission connection), only needs to control the rotation of the valve core in the spherical receiving cavity to make the T-shaped flow channel selectively connected with different channels—without the need to add additional valves or pipeline switching components, the switching of multiple ventilation paths such as "air source-ventilation component" and "ventilation component-external environment" can be realized. This solves the structural redundancy problem caused by the need for multiple sets of independent valves and complex pipeline combinations to achieve path switching in traditional ventilation devices, greatly simplifies the overall structure of the ventilation system, and reduces the size and assembly complexity of the device. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0013] Figure 1 This is a partial structural schematic diagram of the ball valve type ventilation device provided in the embodiments of this disclosure;

[0014] Figure 2 This is a partial explosion diagram of the ball valve type ventilation device provided in the embodiments of this disclosure;

[0015] Figure 3 This is a partial explosion diagram of the ball valve type ventilation device provided in the embodiments of this disclosure;

[0016] Figure 4 This is a partial schematic diagram of the ball valve type ventilation device provided in the embodiments of this disclosure;

[0017] Figure 5 This is a schematic diagram of the valve body provided in an embodiment of this disclosure;

[0018] Figure 6 This is a cross-sectional schematic diagram of the valve body provided in an embodiment of this disclosure;

[0019] Figure 7 This is an assembly diagram of the valve core, pipe fitting, and ring provided in the embodiments of this disclosure;

[0020] Figure 8 This is a cross-sectional schematic diagram of the valve core, pipe fitting, and ring provided in the embodiments of this disclosure;

[0021] Figure 9 This is a partial cross-sectional schematic diagram of the ball valve ventilation device for oral pressure testing provided in the embodiments of this disclosure;

[0022] Figure 10 This is a partial cross-sectional schematic diagram of the ball valve ventilation device during gas exchange testing (gas exhalation path) and conventional ventilation testing provided in the embodiments of this disclosure;

[0023] Figure 11 This is a partial cross-sectional schematic diagram of the ball valve ventilation device during gas exchange testing (gas inhalation path) provided in the embodiments of this disclosure;

[0024] Figure 12 This is a schematic diagram of the structure of the ball valve type ventilation device provided in the embodiments of this disclosure;

[0025] Figure 13 This is a structural schematic diagram of the ball valve-type ventilation device provided in an embodiment of this disclosure from another perspective.

[0026] Figure label:

[0027] 10: Valve core; 101: First flow channel; 102: Second flow channel; 103: First connecting part; 104: Second connecting part; 20: Valve body; 201: X-direction channel; 2011: First end of X-direction channel; 202: Y-direction channel; 2021: First end of Y-direction channel; 2022: Second end of Y-direction channel; 203: Z-direction channel; 204: Receiving cavity; 30: Demand valve; 40: Pipe connector; 401: Pipe head; 402: Collar; 50: Circular ring; 60: Sealing ring; 70: Sealing element; 801: Motor; 802: Transmission rod; 90: Electrical control board; 100: Support frame; 110: Housing. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0030] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0031] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0032] Unless otherwise stated, the term "multiple" means two or more.

[0033] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0036] Combination Figures 1 to 13As shown in the figure, an embodiment of the present disclosure provides a ball valve type ventilation device, including: a valve core 10, which has a spherical structure and an internal T-shaped flow channel, the T-shaped flow channel including a first flow channel 101 and a second flow channel 102 that are connected to each other, and the first flow channel 101 is arranged through the valve core 10 along the axial direction; a valve body 20, which has an X-direction channel 201, a Y-direction channel 202 and a Z-direction channel 203 that are connected through each other and perpendicularly, and the intersection of the X-direction channel 201, the Y-direction channel 202 and the Z-direction channel 203 forms a spherical receiving cavity 204; the first end of the X-direction channel 2011 is used to connect to an external air source, and the second end is blocked; the first end 2021 of the Y-direction channel is used to communicate with the external environment, and the second end is used to connect to the ventilation component; the Z-direction channel 203 is configured to provide a transmission connection between the valve core 10 and an external drive device; wherein, the valve core 10 is rotatably housed in the receiving cavity 204, and the valve core 10 is controlled to rotate to adjust its rotation angle, and selectively communicates with the X-direction channel 201 and Y-direction channel 202 of the valve body 20 through the first flow channel 101 and the second flow channel 102 of the T-shaped flow channel to realize the switching of the ventilation path.

[0037] The ball valve ventilation device provided in this embodiment adopts a ball structure and has a T-shaped flow channel. It works in conjunction with the X / Y / Z vertical connecting channels of the valve body 20 and the spherical receiving cavity 204 at the intersection, so that the valve core 10 can rotate stably in the receiving cavity 204. Through the selective connection of the flow channel and the channel, the ventilation path can be flexibly switched to meet the ventilation needs in multiple scenarios.

[0038] By cooperating with the T-shaped flow channels (first flow channel 101 and second flow channel 102) inside the valve core 10 and the three vertical channels of the valve body 20 (X-direction channel 201 (air source connection), Y-direction channel 202 (environment / ventilation component connection), and Z-direction channel 203 (transmission connection), the T-shaped flow channels can selectively connect with different channels simply by controlling the rotation of the valve core 10 within the spherical receiving cavity 204. This eliminates the need for additional valves and pipeline switching components, enabling the switching of multiple ventilation paths such as "air source-ventilation component" and "ventilation component-external environment". This solves the structural redundancy problem caused by the need for multiple independent valves and complex pipeline combinations to achieve path switching in traditional ventilation devices, greatly simplifying the overall structure of the ventilation system and reducing the size and assembly complexity of the device.

[0039] In this embodiment, the spherical receiving cavity 204 at the intersection of the X-direction channel 201, Y-direction channel 202, and Z-direction channel 203 of the valve body 20 is adapted to the shape of the spherical valve core 10. After the valve core 10 is housed in the receiving cavity 204, the outer wall of the valve core 10 can form a tight fit with the inner wall of the receiving cavity 204, effectively reducing gas leakage from the gap between the valve core 10 and the receiving cavity 204. At the same time, the first flow channel 101 is arranged through the valve core 10 along the axial direction. Combined with the straight structure of the X-direction channel 201 and the Y-direction channel 202, the gas flows through the flow channel without obvious bends or abrupt changes in diameter, which can reduce airflow resistance and turbulence, and ensure smooth gas transmission.

[0040] Whether it's respiratory ventilation in the medical field, gas transmission testing in the industrial field, or gas exchange simulation in the laboratory, it is necessary to switch the ventilation path (such as gas source input and gas exhaust) according to actual needs. The path requirements in different scenarios can be adapted simply by rotating the valve core 10, breaking the limitation of the traditional ventilation device's single structure corresponding to a single scenario, and enabling the same device to cover multiple ventilation application scenarios.

[0041] In this embodiment, the flow areas of the X-direction channel 201, Y-direction channel 202, and Z-direction channel 203 of the valve body 20 are all greater than the flow areas of the first flow channel 101 and the second flow channel 102 of the valve core 10.

[0042] Optionally, it further includes a demand valve 30, located at the first end 2011 of the X-direction channel, for controlling the connection and disconnection of the external gas source and the X-direction channel 201. For example, the demand valve 30 controls the connection and disconnection of the external gas source and the X-direction channel 201 by opening and closing its own valve disc. The demand valve 30 is a one-way valve, and its direction of flow is from the external gas source to the X-direction channel 201.

[0043] Optionally, when the second flow channel 102 is connected to the second end 2022 of the Y-direction channel and the first flow channel 101 is connected to the first end 2011 of the X-direction channel, a gas inhalation path for gas exchange testing is formed; when the valve core 10 is rotated in a controlled manner to the point where both ends of the first flow channel 101 and the Y-direction channel 202 are connected, and the outer wall of the valve core 10 faces the first end 2011 of the X-direction channel and blocks the X-direction channel 201, a gas exhalation path for gas exchange testing or a ventilation path for conventional ventilation testing is formed. In the gas exchange test, the external gas source can be oxygen or diffused gas.

[0044] For example, when one end of the second flow channel 102 is aligned and connected with the second end 2022 of the Y-direction channel, and one end of the first flow channel 101 is aligned and connected with the first end 2011 of the X-direction channel, a gas inhalation path for gas exchange testing is formed. The gas enters the ventilation component sequentially through the external gas source, the first end of the X-direction channel 201, the first flow channel 101, the second flow channel 102, and the second end of the Y-direction channel 202, and then enters the test subject through the ventilation component.

[0045] When the valve core 10 is rotated in a controlled manner until both ends of the first flow channel 101 are aligned and connected with both ends of the Y-direction channel 202, and the outer wall of the valve core 10 blocks the X-direction channel 201, a gas exhalation path for gas exchange testing or a ventilation path for conventional ventilation testing is formed. The gas exhaled by the test subject passes through the ventilation component, the second end of the Y-direction channel 202, the first flow channel 101, and the first end of the Y-direction channel 202 in sequence and is discharged to the external environment. During conventional ventilation testing, the gas can flow in the opposite direction along the above exhalation path.

[0046] When the second flow channel 102 is connected to the second end of the Y-direction channel 202 and the first flow channel 101 is connected to the first end of the X-direction channel 201, a directional gas intake path is formed to ensure the unidirectional airflow of the "intake" process in the gas exchange test and to meet the test requirements for controllable airflow in the intake stage.

[0047] When the valve core 10 rotates to the point where the first flow channel 101 connects both ends of the Y-direction channel 202 and blocks the X-direction channel 201, it can form either an exhalation path or a regular ventilation path. The exhalation path ensures that the airflow is smoothly discharged during the "exhalation" process in the gas exchange test, while the regular ventilation path is suitable for daily ventilation scenarios. This allows a single rotation of the valve core 10 to cover multiple test / use scenarios, simplifying the device structure and reducing the operational complexity of switching between multiple scenarios.

[0048] Optionally, when the outer wall of the valve core 10 faces the second end 2022 of the Y-direction channel and blocks the Y-direction channel 202, the valve body 20 forms a closed cavity for oral pressure testing between the second end 2022 of the Y-direction channel and the outer wall of the valve core 10.

[0049] When the valve core 10 is rotated in a controlled manner until its outer wall blocks the Y-direction channel 202, the second end port of the Y-direction channel 202 of the valve body 20, the outer wall of the valve core 10, and the inner peripheral wall of the second end of the Y-direction channel 202 together form a closed cavity for oral pressure testing. The closed cavity is isolated from the external environment, and only the second end 2022 of the Y-direction channel is connected to the oral cavity of the test subject through a ventilation component. This closed cavity can be used for oral pressure testing without the need for an additional independent pressure testing cavity, thus expanding the pressure testing function on the basis of the ventilation function and improving the functional integration of the device.

[0050] Optionally, the outer wall of the valve core 10 extends outward along its own axial direction to form a first connecting portion 103 and a second connecting portion 104 coaxially arranged; the axes of the first connecting portion 103 and the second connecting portion 104 are both collinear with the axis of the valve core 10; wherein, the first connecting portion 103 is located at the first end of the Z-direction channel 203, the outer peripheral wall of the first connecting portion 103 is clearance-fitted with the inner peripheral wall of the first end of the Z-direction channel 203, and the first connecting portion 103 is used for transmission connection with an external drive device; the second connecting portion 104 is located inside the second end of the Z-direction channel 203, the outer peripheral wall of the second connecting portion 104 is clearance-fitted with the inner peripheral wall of the second end of the Z-direction channel 203, the end of the second connecting portion 104 away from the valve core 10 is flush with the end of the second end of the Z-direction channel 203 or extends into the interior of the second end of the Z-direction channel 203, and the second connecting portion 104 is used to define the position of the valve core 10 along the axial direction of the Z-direction channel 203.

[0051] The first connecting part 103 is located at the first end of the Z-direction channel 203 and is used to connect to an external drive device to achieve efficient transmission of drive torque; the second connecting part 104 is located at the second end of the Z-direction channel 203 and can limit the displacement of the valve core 10 along the Z-direction channel 203 axial direction, prevent the valve core 10 from axially moving during rotation, and ensure the accuracy of the flow channel and channel docking.

[0052] Optionally, the first connecting portion 103 is configured with a groove structure or a boss structure. The end of the first connecting portion 103 away from the valve core 10 is configured with a groove structure or a boss structure, which is used to fit or engage with the connection structure of the external drive device to realize torque transmission.

[0053] Optionally, the valve body 20 is provided with pipe joints 40 at the first end 2011 of the X-direction channel and at both ends of the Y-direction channel 202. The pipe joints 40 are used to restrict the position of the valve core 10 and connect to the external air source and ventilation components.

[0054] The valve body 20 has pipe joints 40 coaxially fixed at the first end 2011 of the X-direction channel and the two ends of the Y-direction channel 202. One end of the pipe joint 40 extends into the corresponding channel and is interference-fitted or threaded to the inner circumferential wall of the channel. The end of the pipe joint 40 extending into the channel is in contact with the outer wall of the valve core 10 to limit the displacement of the valve core 10 along the channel axis. The end of the pipe joint 40 away from the valve body 20 is used to connect to an external air source or ventilation component to form a transition channel for gas flow.

[0055] Optionally, a ring 50 is provided at the connection between the pipe fitting 40 and the valve core 10. The side of the ring 50 facing the valve core 10 is adapted to the shape of the outer wall of the valve core 10 to ensure that the valve core 10 can rotate. The inner diameter of the ring 50 is equal to the inner diameter of the first flow channel 101 or the second flow channel 102 of the valve core 10.

[0056] A ring 50 is provided at the connection between the end of the pipe connector 40 that extends into the channel of the valve body 20 and the valve core 10. The outer peripheral wall of the ring 50 is press-fitted or bonded to the inner peripheral wall of the pipe connector 40. The side of the ring 50 facing the valve core 10 is an arc-shaped surface that fits the outer side wall of the valve core 10. The arc-shaped surface slides against the outer side wall of the valve core 10 to ensure that the valve core 10 rotates smoothly around its own axis. The inner diameter of the ring 50 is equal to the inner diameter of the first flow channel 101 / second flow channel 102 of the valve core 10, and the axis of the ring 50 is collinear with the axis of the corresponding flow channel to avoid throttling and turbulence during gas flow.

[0057] Optionally, the annular ring 50 is coaxially arranged with the first flow channel 101 or the second flow channel 102 of the valve core 10, and the inner hole of the annular ring 50 is aligned with the port of the corresponding flow channel to ensure that the gas flows axially.

[0058] Optionally, the ring 50 may be partially or entirely embedded in the end of the pipe fitting 40 to restrict its installation position. For example, the end of the pipe fitting 40 that extends into the channel has an installation groove, and the ring 50 may be partially or entirely embedded in the installation groove. The depth of the installation groove is adapted to the thickness of the ring 50 to restrict the displacement of the ring 50 along the axial direction of the pipe fitting 40, ensuring that the ring 50 is always in the mating position between the valve core 10 and the pipe fitting 40, and continuously performs the sealing and guiding functions.

[0059] Optionally, the end of the pipe fitting 40 connected to the ring 50 is provided with an annular groove, in which a sealing ring 60 is embedded, and the side of the ring 50 facing away from the valve core 10 abuts against the sealing ring 60.

[0060] The end face of the pipe fitting 40 connected to the ring 50 is recessed inward to form an annular groove. The axis of the annular groove is collinear with the axis of the pipe fitting 40. A sealing ring 60 is embedded in the annular groove. The sealing ring 60 fits against the outer wall of the ring 50. The side of the ring 50 away from the valve core 10 abuts against the end face of the sealing ring 60, which can form a secondary seal between the ring 50 and the pipe fitting 40, further blocking the gas leakage path.

[0061] Optionally, the pipe fitting 40 includes: a pipe head 401, one end of which passes through the X-direction channel 201 or the Y-direction channel 202 of the valve body 20, and the other end of which is connected to an external air source or ventilation component; and a collar 402, which is fitted on the outer wall of the pipe head 401 and abuts against the outer wall of the valve body 20.

[0062] One end of the tube head 401 is inserted into the X-direction channel 201 or Y-direction channel 202 of the valve body 20. The part of the tube head 401 inserted into the channel is fixedly connected to the inner peripheral wall of the channel. The end of the tube head 401 away from the valve body 20 is used to connect to an external gas source or ventilation component to extend the gas transmission channel. The collar 402 is coaxially sleeved on the outer side wall of the tube head 401. One end of the collar 402 is fixedly connected to the outer side wall of the tube head 401, and the other end is in contact with the outer side wall of the valve body 20. It is used to limit the depth of the tube head 401 inserted into the channel and enhance the stability of the connection between the tube head 401 and the valve body 20.

[0063] Optionally, the inner wall of the tube head 401 is stepped, and the diameter of the end away from the valve core 10 is larger than the diameter of the end facing the valve core 10; wherein, the diameter of the end of the tube head 401 facing the valve core 10 is equal to the diameter of the first flow channel 101 or the second flow channel 102 of the valve core 10.

[0064] The inner wall of the pipe head 401 is stepped, forming a small-diameter section near the valve core 10 and a large-diameter section away from the valve core 10, with the diameter of the large-diameter section being larger than that of the small-diameter section. The diameter of the small-diameter section of the pipe head 401 is equal to the diameter of the first flow channel 101 or the second flow channel 102 of the valve core 10, and the axis of the small-diameter section is collinear with the axis of the corresponding flow channel. The end of the small-diameter section away from the large-diameter section mates with the annulus 50 or the outer wall of the valve core 10. The large-diameter section can be adapted to the interface size of external equipment, and the small-diameter section is equal to the flow channel diameter of the valve core 10, realizing a gradual transition in diameter from the external equipment interface to the pipe head 401 to the flow channel of the valve core 10, reducing airflow resistance.

[0065] Optionally, it also includes: a sealing element 70, disposed at the second end of the X-direction channel 201, for blocking the second end of the X-direction channel 201 from communicating with the outside. The outer peripheral wall of the sealing element 70 is threaded or interference-fitted with the inner peripheral wall of the second end of the X-direction channel 201, and the end face of the sealing element 70 is flush with or protrudes from the port of the second end of the X-direction channel 201, for blocking the second end of the X-direction channel 201 from communicating with the outside, thereby achieving a seal at the second end of the X-direction channel 201, ensuring that the gas in the X-direction channel 201 can only flow along a preset path (such as communicating with the flow channel of the valve core 10), while preventing external impurities from entering the device from the second end of the X-direction channel 201.

[0066] Optionally, it also includes: a drive device, which is connected to the valve core 10 for driving the valve core 10 to rotate to adjust the rotation angle, so that the first flow channel 101 and the second flow channel 102 of the T-shaped flow channel are selectively connected with the X-direction channel 201 and the Y-direction channel 202 of the valve body 20, thereby realizing the switching of the ventilation path.

[0067] The output end of the drive device is connected to the first connecting part 103 of the valve core 10. The drive device drives the valve core 10 to rotate around its own axis by outputting torque to adjust the rotation angle, so that the first flow channel 101 and the second flow channel 102 of the T-shaped flow channel are selectively connected with the X-direction channel 201 and the Y-direction channel 202 of the valve body 20, thereby realizing the switching of the ventilation path.

[0068] Optionally, the driving device includes a motor 801 and a transmission rod 802 connected to each other. The output shaft of the motor 801 is coaxially and fixedly connected to one end of the transmission rod 802. The motor 801 drives the output shaft to rotate around its own axis, thereby driving the transmission rod 802 to rotate synchronously around its own axis. The other end of the transmission rod 802 is connected to the first connecting part 103 of the valve core 10 to drive the valve core 10 to rotate around the axis of the transmission rod 802 (i.e., the axis of the valve core 10).

[0069] Optionally, the end of the transmission rod 802 is provided with a connecting part, which is connected to the first connecting part 103 of the valve core 10 to achieve the connection and fixation between the transmission rod 802 and the valve core 10.

[0070] The end of the transmission rod 802 away from the motor 801 has a connecting part. The structure of the connecting part is adapted to the groove structure or boss structure of the first connecting part 103 of the valve core 10. When the first connecting part 103 is a groove structure, the connecting part is a boss structure, and the two are fitted together. When the first connecting part 103 is a boss structure, the connecting part is a groove structure, and the two are snapped together to achieve a fixed connection between the transmission rod 802 and the valve core 10 and torque transmission.

[0071] Optionally, the device also includes an electronic control board 90, which is electrically connected to the motor 801 of the drive device via wires. The electronic control board 90 controls the start, stop, speed, and direction of the motor 801 by outputting control signals or switching signals, thereby precisely controlling the rotation angle of the valve core 10. For example, different rotation angle programs can be preset through the electronic control board 90 to adapt to the path switching requirements in multiple scenarios and enhance the intelligence of the device.

[0072] Optionally, it also includes: a support frame 100 connected to the drive device for supporting the drive device; wherein the electronic control board 90 is detachably connected to the support frame 100.

[0073] The support frame 100 is connected to the drive device and can provide stable support for the drive device, preventing the drive device from shifting or tilting due to its own weight or operating vibration, and ensuring the transmission and matching accuracy between the drive device and the valve core 10.

[0074] Optionally, it also includes: a housing 110 that encloses a receiving cavity, the receiving cavity being configured to at least receive the valve body 20, the valve core 10 and the drive device; wherein, the side wall of the housing 110 is provided with a plurality of connection ports so that the X-direction channel 201 and the Y-direction channel 202 of the valve body 20 can be connected to an external air source and an external ventilation component.

[0075] The outer casing 110 is formed by a hinge connecting one side of the casing and the cover plate, and a snap-fit ​​connection on the other side, which together enclose a receiving cavity. The valve body 20, the valve core 10 and the drive device are all fixedly placed in the receiving cavity. The side wall of the outer casing 110 has corresponding connection ports at the positions of the first end of the X-direction channel 201, the first end of the Y-direction channel 202 and the second end of the Y-direction channel 202 of the valve body 20. The axis of the connection port is collinear with the axis of the corresponding channel. The X-direction channel 201 and the Y-direction channel 202 of the valve body 20 or the pipe joint 40 installed in the channel passes through the corresponding connection ports and is connected to the external air source and the external ventilation component.

[0076] The enclosure 110 encloses the core components such as the valve body 20, valve core 10, and drive device, providing physical protection for the internal components and preventing damage from external collisions, dust, and moisture, thus extending the service life of the device.

[0077] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims, and the foregoing embodiments should be considered exemplary and non-limiting.

Claims

1. A ball valve type ventilation device, characterized in that, include: The valve core has a spherical structure and a T-shaped flow channel inside. The T-shaped flow channel includes a first flow channel and a second flow channel that are connected to each other, and the first flow channel is arranged to pass through the valve core along the axial direction. The valve body has through-flow, perpendicularly connected X-direction, Y-direction, and Z-direction channels, and the intersection of the X-direction, Y-direction, and Z-direction channels forms a spherical receiving cavity; the first end of the X-direction channel is used to connect to an external air source, and the second end is blocked; the first end of the Y-direction channel is used to connect to the external environment, and the second end is used to connect to a venting component; the Z-direction channel is configured to provide a transmission connection between the valve core and an external drive device. The valve core is rotatably housed within the receiving cavity, and its rotation is controlled to adjust its rotation angle. It selectively connects with the X-direction channel and Y-direction channel of the valve body through the first and second channels of the T-shaped flow channel, thereby achieving the switching of the ventilation path.

2. The ball valve type ventilation device according to claim 1, characterized in that, With the second flow channel connected to the second end of the Y-direction channel and the first flow channel connected to the first end of the X-direction channel, a gas intake path for gas exchange testing is formed. When the valve core is rotated in a controlled manner until both ends of the first flow channel and the Y-direction channel are connected, and the outer wall of the valve core faces the first end of the X-direction channel and blocks the X-direction channel, a gas exhalation path for gas exchange testing or a ventilation path for conventional ventilation testing is formed. With the outer wall of the valve core facing the second end of the Y-direction channel and blocking the Y-direction channel, the valve body forms a closed cavity for oral pressure testing between the second end of the Y-direction channel and the outer wall of the valve core.

3. The ball valve type ventilation device according to claim 1, characterized in that, Also includes: The demand valve, located at the first end of the X-direction channel, is used to control the connection and disconnection of the external air source with the X-direction channel.

4. The ball valve type ventilation device according to claim 1, characterized in that, The outer side wall of the valve core protrudes outward to form a first connecting part and a second connecting part arranged coaxially. The first connecting part is located at the first end of the Z-direction channel and is used for transmission connection with the drive device; the second connecting part is located at the second end of the Z-direction channel and is used to define the position of the valve core along the axial direction of the Z-direction channel.

5. The ball valve type ventilation device according to claim 1, characterized in that, The valve body is equipped with pipe joints at the first end of the X-direction channel and at both ends of the Y-direction channel. The pipe joints are used to restrict the position of the valve core and to connect to the external air source and ventilation components.

6. The ball valve type ventilation device according to claim 5, characterized in that, A ring is provided at the connection between the pipe fitting and the valve core. The side of the ring facing the valve core is adapted to the shape of the outer wall of the valve core to ensure the rotation of the valve core. The inner diameter of the annulus is equal to the inner diameter of the first or second flow channel of the valve core.

7. The ball valve type ventilation device according to claim 5, characterized in that, The end of the pipe fitting that connects to the ring has an annular groove, in which a sealing ring is embedded. The side of the ring away from the valve core abuts against the sealing ring.

8. The ball valve type ventilation device according to any one of claims 1 to 7, characterized in that, Also includes: The drive unit is connected to the valve core drive and is used to drive the valve core to rotate to adjust the rotation angle, so that the first and second flow channels of the T-shaped flow channel are selectively connected with the X-direction channel and Y-direction channel of the valve body, thereby realizing the switching of the ventilation path.

9. The ball valve type ventilation device according to claim 8, characterized in that, The drive unit includes a motor and a transmission rod connected together. The transmission rod is connected to the valve core. The motor drives the transmission rod to rotate around its own axis, thereby causing the valve core to rotate around the axis of the transmission rod.

10. The ball valve type ventilation device according to claim 8, characterized in that, Also includes: The housing encloses a receiving cavity, which is configured to at least receive the valve body, valve core, and actuator. The outer casing has multiple connection ports on its side wall so that the X-direction and Y-direction channels of the valve body can be connected to external air sources and external ventilation components.

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