Flow sensor and breathing machine
By setting a partition in the tube body of the ventilator flow sensor, the fluid channel is divided into multiple sub-channels, the problems of noise and uneven flow under high flow velocity state are solved, and the accuracy and accuracy of flow detection are improved.
Patent Information
- Application Number
- CN202322893462.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-26
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-10-26
AI Technical Summary
The ultrasonic flow sensors on existing ventilators are prone to noise and uneven flow problems under high flow velocity conditions, resulting in flow test errors and affecting detection accuracy.
A flow sensor is designed to separate the fluid channel into multiple sub-channels by providing a partition in the tube body, increasing the uniformity of the fluid flow, thereby reducing noise and detection errors.
By separating the fluid channels, the uniformity of the fluid flow is improved, the noise in the flow sensor is significantly reduced, the accuracy of flow detection is improved, and the error is reduced.
Smart Images
Figure CN222426874U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sensors, and particularly relates to a flow sensor and a ventilator. Background Art
[0002] The ultrasonic flow sensor on the existing ventilator will produce certain noise due to pressure changes under high flow and high flow rate conditions, and the noise will produce sound wave fluctuations. The ultrasonic emission signal propagates in the pipeline, and the amplitude of the ultrasonic echo signal will be attenuated by factors such as flow rate and noise, resulting in incorrect positioning of the ultrasonic echo signal, which will lead to serious measurement errors. Especially under high flow rate conditions, it is difficult to determine the characteristic points using common methods, which makes flow testing prone to errors, thereby affecting the detection accuracy of the ultrasonic flow sensor. Utility Model Content
[0003] The technical problem to be solved by the utility model is: to provide a flow sensor and a ventilator for the problem that the flow test of the ultrasonic flow sensor on the existing ventilator is prone to errors under high flow rate conditions.
[0004] In order to solve the above technical problems, on the one hand, the embodiment of the utility model provides a flow sensor, including a pipe body, a detection module and a flow guide, wherein the detection module is installed on the pipe body and is used to detect the flow rate of the fluid in the pipe body;
[0005] A fluid channel is arranged in the tube body, and the flow guide comprises a partition plate, which is arranged in the fluid channel and extends along the axial direction of the tube body to divide the fluid channel into a plurality of sub-channels.
[0006] Optionally, the partition includes a first partition and a second partition, at least one edge of the first partition abuts against the peripheral wall surface of the fluid channel, at least one edge of the second partition abuts against the peripheral wall surface of the fluid channel, and the angle between the plane where the first partition is located and the plane where the second partition is located is greater than zero.
[0007] Optionally, a plurality of the first partitions are provided, and the plurality of the first partitions are parallel to each other and spaced apart; a plurality of the second partitions are provided, and the plurality of the second partitions are parallel to each other and spaced apart.
[0008] Optionally, the guide also includes a limit member, which is provided with a connecting hole, the tube body has an inlet end and an outlet end, the fluid channel connects the inlet end and the outlet end, the end of the partition close to the inlet end is arranged in the connecting hole, and the limit member is attached to the end face of the inlet end.
[0009] Optionally, the tube body is cylindrical, the limiting member is annular, the inner circumferential surface of the limiting member is aligned with the inner circumferential surface of the tube body, and the outer circumferential surface of the limiting member is aligned with the outer circumferential surface of the tube body.
[0010] Optionally, the flow sensor further comprises a screen plate, the limiting member is provided with a sink groove, and the screen plate is embedded in the sink groove.
[0011] Optionally, the screen plate includes a screen and a frame, the frame is arranged around the screen, the frame is arranged in the sink, the area of the screen is consistent with the area of the connecting hole, and the screen is provided with a plurality of screen holes arranged at even intervals.
[0012] On the other hand, an embodiment of the present invention provides a ventilator, comprising the flow sensor as described above.
[0013] The flow sensor provided in the embodiment of the utility model can separate a plurality of sub-channel fluid channels by setting a partition, so that the fluid can be separated and guided when the fluid passes through, thereby increasing the uniformity of the fluid flow, thereby eliminating the noise generated by the uneven flow in the flow sensor to the greatest extent, making the fluid flow smooth, thereby reducing detection errors. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of a flow sensor provided by an embodiment of the utility model;
[0015] Figure 2 It is a schematic diagram of a tube body provided by an embodiment of the utility model;
[0016] Figure 3 It is a schematic diagram of a deflector and a screen plate provided in one embodiment of the utility model.
[0017] The reference numerals in the specification are as follows:
[0018] 1. Tube body; 11. Fluid channel;
[0019] 2. Detection module;
[0020] 3. flow guide; 31. first baffle; 32. second baffle; 33. stopper; 331. connection hole; 332. sink;
[0021] 4. Screen plate; 41. Screen; 42. Frame. DETAILED DESCRIPTION
[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0023] like Figures 1 to 3 As shown, on the one hand, an embodiment of the utility model provides a flow sensor, comprising a pipe body 1, a detection module 2 and a flow guide 3, wherein the detection module 2 is mounted on the pipe body 1, and the detection module 2 is used to detect the flow of the fluid in the pipe body 1. A fluid channel 11 for passing the fluid is provided in the pipe body 1, and the flow guide 3 comprises a partition, which is arranged in the fluid channel 11 and extends along the axial direction of the pipe body 1 to divide the fluid channel 11 into a plurality of sub-channels.
[0024] When the flow sensor detects flow, under high flow rate conditions, changes in pressure will generate noise, which will affect the detection results. In this embodiment, by setting up partitions, multiple sub-channels can be separated, so that when the fluid passes through the sub-channels, the fluid can be separated and guided, thereby increasing the uniformity of the fluid flow, thereby eliminating the noise generated by the uneven flow in the flow sensor to the greatest extent, making the fluid flow smooth, thereby reducing detection errors.
[0025] In one embodiment, the length of the partition is consistent with the axial length of the tube body 1, and the edge of the partition abuts against the inner wall surface of the fluid channel 11, which can achieve the separation of the fluid channel 11, thereby improving the uniformity of the fluid and reducing noise during the process of the fluid passing through the fluid channel 11.
[0026] In one embodiment, if Figure 3 As shown, the partition includes a first partition 31 and a second partition 32, at least one edge of the first partition 31 abuts against the peripheral wall surface of the fluid channel 11, at least one edge of the second partition 32 abuts against the peripheral wall surface of the fluid channel 11, the angle between the plane where the first partition 31 is located and the plane where the second partition 32 is located is greater than zero, and the first partition 31 and the second partition 32 are cross-arranged to separate the fluid channel 11.
[0027] Specifically, the edges on the opposite sides of the first partition 31 both abut against the inner wall surface of the fluid channel 11, and the edges on the opposite sides of the second partition 32 both abut against the inner wall surface of the fluid channel 11. At this time, when the first partition 31 and the second partition 32 are connected, a first plug-in groove is provided on the first partition 31, and a second plug-in groove is provided on the second partition 32. The first partition 31 is plugged into the second plug-in groove, and the second partition 32 is plugged into the first plug-in groove, thereby connecting the first partition 31 and the second partition 32 together.
[0028] Alternatively, the edges of the two opposite sides of the first partition 31 are both in contact with the inner wall surface of the fluid channel 11, one side edge of the second partition 32 is in contact with the first partition 31, and the other side edge of the second partition 32 is in contact with the inner wall surface of the fluid channel 11. Both of the above methods can realize the cross connection of the first partition 31 and the second partition 32, and divide the fluid channel 11 into multiple sub-channels. Preferably, the fluid channel 11 is divided into nine sub-channels.
[0029] In one embodiment, if Figure 3 As shown, a plurality of first baffles 31 are provided, and the plurality of first baffles 31 are parallel to each other and spaced apart. A plurality of second baffles 32 are provided, and the plurality of second baffles 32 are parallel to each other and spaced apart, which can ensure the uniformity of the plurality of sub-channels separated by the fluid channel 11 to the greatest extent. Preferably, on a plane perpendicular to the axial direction of the tube body 1, the first baffle 31 extends in the transverse direction, the second baffle 32 extends in the longitudinal direction, and the first baffle 31 and the second baffle 32 are perpendicular to each other, which facilitates the connection of the first baffle 31 and the second baffle 32.
[0030] In one embodiment, if Figure 3 As shown, the flow guide 3 also includes a stopper 33, on which a connection hole 331 is provided. The tube body 1 has an inlet end and an outlet end, and the fluid channel 11 connects the inlet end and the outlet end. The connection hole 331 is connected to the inlet end, and the area of the connection hole 331 is consistent with the cross-sectional area of the fluid channel 11. The cross-sectional area at this time refers to the plane perpendicular to the axial direction of the tube body 1. The end of the partition close to the inlet end is arranged in the connection hole 331, and the stopper 33 is attached to the end face of the inlet end. When the partition is inserted into the fluid channel 11, the position of the partition in the tube body 1 can be limited by the stopper 33, which facilitates the connection between the flow guide 3 and the tube body 1 and improves the assembly efficiency.
[0031] In a preferred embodiment, if Figure 2 , Figure 3 As shown, the tube body 1 is cylindrical, the limit member 33 is annular, the limit member 33 is sleeved on the outside of the partition, the inner circumference of the limit member 33 is aligned with the inner circumference of the tube body 1, the outer circumference of the limit member 33 is aligned with the outer circumference of the tube body 1, and the width of the limit member 33 is consistent with the thickness of the tube body 1, which facilitates the positioning connection between the limit member 33 and the tube body 1, and also avoids the situation where the limit member 33 blocks the entrance end.
[0032] In one embodiment, if Figure 1 , Figure 3As shown, the flow sensor also includes a screen plate 4, and a groove 332 is provided on the limit member 33. The groove 332 is recessed in the direction of the tube body 1, and penetrates the limit member 33 in the direction of the central axis of the limit member 33, so that the groove 332 is connected to the connecting hole 331, and the screen plate 4 is embedded in the groove 332. The fluid first passes through the screen plate 4, and the uniformity of the fluid is preliminarily adjusted to make the flow rate of the fluid smooth. After entering the fluid channel 11, the fluid is diverted by the partition, which further increases the uniformity of the fluid flow and reduces noise.
[0033] In one embodiment, if Figure 3 As shown, the screen plate 4 includes a screen 41 and a frame 42. The frame 42 is arranged around the screen 41, and the frame 42 is arranged in the sink 332. In the axial direction of the tube body 1, the position of the screen 41 corresponds to the position of the connecting hole 331, and the area of the screen 41 is consistent with the area of the connecting hole 331. The screen 41 is provided with a plurality of sieve holes arranged at even intervals. The fluid passes through the sieve holes and the connecting hole 331 in turn and enters the fluid channel 11. The sieve holes improve the uniformity of the fluid and make the fluid smooth.
[0034] On the other hand, an embodiment of the present invention provides a ventilator, comprising the flow sensor of the above embodiment.
[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A flow sensor, characterized in that: It includes a pipe body, a detection module and a flow guide, wherein the detection module is installed on the pipe body and is used to detect the flow rate of the fluid in the pipe body; A fluid channel is arranged in the tube body, and the flow guide comprises a partition plate, which is arranged in the fluid channel and extends along the axial direction of the tube body to divide the fluid channel into a plurality of sub-channels.
2. The flow sensor according to claim 1, characterized in that: The partition includes a first partition and a second partition, at least one edge of the first partition abuts against the peripheral wall surface of the fluid channel, at least one edge of the second partition abuts against the peripheral wall surface of the fluid channel, and the angle between the plane where the first partition is located and the plane where the second partition is located is greater than zero.
3. The flow sensor according to claim 2, characterized in that: There are a plurality of first partitions, which are parallel to each other and spaced apart; there are a plurality of second partitions, which are parallel to each other and spaced apart.
4. The flow sensor according to claim 1, characterized in that: The guide also includes a limiter, which is provided with a connecting hole. The tube body has an inlet end and an outlet end, the fluid channel connects the inlet end and the outlet end, an end of the partition close to the inlet end is arranged in the connecting hole, and the limiter is attached to the end surface of the inlet end.
5. The flow sensor according to claim 4, characterized in that: The tube body is cylindrical, the limiting member is annular, the inner circumference of the limiting member is aligned with the inner circumference of the tube body, and the outer circumference of the limiting member is aligned with the outer circumference of the tube body.
6. The flow sensor according to claim 4, characterized in that: The flow sensor further comprises a screen plate, the limiting member is provided with a sink groove, and the screen plate is embedded in the sink groove.
7. The flow sensor according to claim 6, characterized in that: The screen plate includes a screen and a frame, wherein the frame is arranged around the screen and is arranged in the sink. The area of the screen is consistent with the area of the connecting hole, and the screen is provided with a plurality of screen holes arranged at even intervals.
8. A ventilator, characterized in that: A flow sensor comprising any one of claims 1-7.