One-way fluid control device based on L-shaped baffle and mirror image lower jaw structure

Abstract

The invention discloses a one-way fluid control device based on an L-shaped baffle and a mirror image lower jaw structure, and relates to the field of fluid control. The problems that an existing one-way valve structure usually achieves the one-way flowing effect through a mechanical device, and the device is usually large in size, complex in structure and difficult to adapt to fine flowing scenes are solved. The device comprises a fluid inlet and a fluid outlet, at least one main flow channel is arranged between the fluid inlet and the fluid outlet, an L-shaped baffle is arranged on the axis of the main flow channel, and the tip end of the L-shaped baffle is located on the axis of the main flow channel. The tip end of the L-shaped baffle faces the side where the fluid inlet is located, and the rear end of the L-shaped baffle faces the side where the fluid outlet is located. Lower jaw-shaped channels are distributed on the side face of the main flow channel in a mirror image mode. The device is also suitable for the field of fluid backflow limiting devices.

Description

Technical Field

[0001] The invention relates to the technical field of fluid control, and in particular to a one-way fluid control device based on an L-shaped baffle and a mirror-image jaw structure. Background Art

[0002] The traditional check valve in the field of fluid control is a valve that allows fluid to flow in one direction and blocks flow in the other direction. Although check valves are very effective in many applications, they may also have some problems or limitations that may affect their performance or applicability. The following are some problems that traditional check valves may have:

[0003] 1. Back pressure sensitivity: Traditional check valves are sensitive to changes in downstream pressure back pressure. If the downstream pressure is too high, it may cause the valve to close loosely, allowing fluid to flow back. This may lead to reduced system efficiency or functional failure.

[0004] 2. Flow restriction: The design of the check valve may limit the maximum flow through the valve. This can become a problem in applications that require high flow.

[0005] 3. Response speed: Traditional check valves may have a slow response speed, especially in applications that quickly switch forward and reverse flows, which may result in reduced system performance.

[0006] 4. Wear and leakage: With the increase of use time, the seals and moving parts inside the check valve may wear and cause leakage. This not only affects the performance of the valve, but may also cause system contamination.

[0007] 5. Installation direction: Traditional one-way valves usually have specific installation direction requirements to ensure the correct working direction. If installed incorrectly, the valve may not work properly.

[0008] 6. Size and Weight: In space-constrained applications, the size and weight of traditional check valves can become an issue.

[0009] In summary, in the field of fluid control, traditional one-way valve structures often use mechanical devices to achieve one-way flow effects, but these devices are usually large in size, complex in structure, and difficult to adapt to some delicate flow scenarios. In addition, the prior art lacks such a structure that imitates the design of ant mandibles to achieve effective one-way fluid control. Summary of the invention

[0010] The present invention aims to solve the problem that the one-way valve structure in the prior art often uses mechanical devices to achieve the one-way flow effect, but these devices are usually large in size, complex in structure, and difficult to adapt to some delicate flow scenarios. To solve the above technical problems, the present invention is implemented through the following technical solutions:

[0011] Solution 1. The present invention proposes a one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure, wherein the one-way fluid control device comprises a fluid inlet and a fluid outlet, wherein at least one mainstream channel is arranged between the fluid inlet and the fluid outlet, and an L-shaped baffle is arranged on the axis line of the mainstream channel, wherein the tip of the L-shaped baffle is located on the axis line of the mainstream channel, and the tip of the L-shaped baffle is facing the side where the fluid inlet is located, and the rear end of the L-shaped baffle is facing the side where the fluid outlet is located; a jaw-shaped channel is distributed on the side of the mainstream channel in a mirrored manner.

[0012] Furthermore, a preferred embodiment is provided, wherein the mainstream channel is divided into a front end and a rear end by an L-shaped baffle, and the front end and the rear end are located on the same axial line; the fluid inlet is connected to the end of the front end, and the fluid outlet is connected to the end of the rear end.

[0013] Furthermore, a preferred embodiment is provided, wherein the fluid inlet, the fluid outlet and the mainstream channel are located on the same axis.

[0014] Furthermore, a preferred embodiment is provided, wherein one end of the lower jaw-shaped channel is closed, i.e., the closed end, and the other end is connected to the main channel, i.e., the open end, and the closed end of the lower jaw-shaped channel faces the side where the fluid inlet is located, and the open end of the lower jaw-shaped channel faces the side where the fluid outlet is located.

[0015] Furthermore, a preferred embodiment is provided, wherein the angle between the guide edge of the lower jaw-shaped channel and the axis of the mainstream channel is α, and the angle between the return edge of the lower jaw-shaped channel and the axis of the mainstream channel is β, then β=2α.

[0016] Furthermore, a preferred embodiment is provided, in which the ratio of the return side length s of the lower jaw-shaped channel to the guide side length S of the lower jaw-shaped channel is S=1.93s.

[0017] Furthermore, a preferred embodiment is provided, wherein the ratio of the length of the return side to the length of the guide side of the lower jaw-shaped channel is in the range of 1.8 to 2.3.

[0018] Furthermore, a preferred embodiment is provided, in which the horizontal distance between the L-shaped baffle and the lower jaw-shaped channel is d=0.4D, D is the width of the mainstream channel, and the tip of the L-shaped baffle is located on the axis line of the mainstream channel, and the angle θ is 66°.

[0019] Furthermore, a preferred embodiment is provided, wherein the tip of the L-shaped baffle plate faces the side where the fluid inlet is located, and the rear end of the L-shaped baffle plate faces the side where the fluid outlet is located.

[0020] Furthermore, a preferred embodiment is provided, wherein the one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure also includes a box body, the front panel and the rear panel of the box body are parallel to each other, the fluid inlet and the fluid outlet are symmetrically arranged on the front panel and the rear panel, and the fluid inlet and the fluid outlet are arranged in multiple groups at intervals on the front panel and the rear panel.

[0021] The present invention is beneficial in that:

[0022] The one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure described in the present invention provides an L-shaped baffle 11 in the mainstream channel inside the device and mirrored jaw structures on both sides of the mainstream channel, so that there is a huge difference in the flow field inside the device when the fluid flows forward and reverse. When the fluid flows forward, due to the structural characteristics of the L-shaped baffle 11, the smooth shape from the tip to the rear end allows the fluid to be almost unobstructed, and the resistance loss through this path is small, thereby ensuring the smooth flow of the fluid; and because the closed end of the jaw-shaped channel faces the fluid inlet and the open end of the jaw-shaped channel faces the fluid outlet, the fluid mainly flows in the mainstream channel, and there is almost no fluid in and out of the jaw-shaped channel 9. Finally, the fluid encounters less resistance when passing through the device.

[0023] When the fluid in the device of the present invention flows in reverse, its flow direction is opposite to the direction of the tip of the L-shaped baffle 11. At this time, the fluid will first hit the L-shaped baffle 11 and cannot directly pass through the main channel. Due to the structural design of the L-shaped baffle 11, part of the fluid is forced to change direction and is guided into the jaw-shaped channels 9 distributed in mirror symmetry on both sides of the main channel.

[0024] In the device of the present invention, the fluid entering the jaw-shaped channel 9 is guided from the open end 93 into the mirror-symmetrical jaw-shaped channel 9 structure, and the fluid enters the closed end 94 through the guide plate 92 and collides, generating a large number of turbulent vortices, and then leaves the jaw-shaped channel 9 through the return plate 91, and its flow direction is opposite to the flow direction of the fluid in the mainstream channel 10, generating turbulent collisions and consuming the flow kinetic energy of the fluid. The L-shaped baffle 11 structure plays a role in diversion and deceleration. The design of the L-shaped baffle increases the resistance of the fluid flow, effectively reduces the reverse flow of the fluid, and achieves the purpose of limiting the reflux of the fluid.

[0025] The present invention is based on a bio-inspired design, such as imitating the unidirectional control characteristics of the ant's mandible, and can provide a passive unidirectional fluid control solution that does not require a mechanical structure, which not only simplifies the device structure but also reduces energy loss during the passage of the fluid.

[0026] The present invention is also applicable to the field of devices for limiting fluid backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of a one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure described in the present invention.

[0028] Figure 2 This is a rear view of a one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure described in the present invention.

[0029] Figure 3 It is a side sectional view of a one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure described in the present invention.

[0030] Figure 4 This is a detailed cross-sectional view of the main flow channel and the lower jaw-shaped channel portion described in the first embodiment.

[0031] Figure 5 This is a schematic diagram of the connection of the two main flow channels described in the eleventh embodiment.

[0032] Figure 6 This is the fluid velocity vector diagram during forward flow as described in the eleventh embodiment.

[0033] Figure 7 This is the local fluid velocity vector diagram during forward flow as described in Implementation Example 11.

[0034] Figure 8 This is the pressure distribution diagram during forward flow described in Implementation Example 11.

[0035] Fig. 9 This is the fluid velocity vector diagram during reverse flow as described in the eleventh embodiment.

[0036] Fig.10 This is the local fluid velocity vector diagram during reverse flow as described in Implementation Example 11.

[0037] Fig.11 This is the pressure distribution diagram during reverse flow described in Implementation Example 11.

[0038] In the figure, the front panel 1, the rear panel 2, the upper top plate 3, the lower bottom plate 4, the left side plate 5, the right side plate 6, the fluid inlet 7, the fluid outlet 8, the lower jaw-shaped channel 9, the return plate 91, the guide plate 92, the mainstream channel 10, 1 the front end 101 of the mainstream channel, the rear end 102 of the mainstream channel, the L-shaped baffle 11, the tip 111 of the L-shaped baffle, and the rear end 112 of the L-shaped baffle. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the implementation methods of the present application clearer, the technical solutions in the implementation methods of the present application will be clearly and completely described below in conjunction with the drawings in the implementation methods of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, not all of the implementation methods.

[0040] Embodiment 1. This embodiment provides a one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure, wherein the one-way fluid control device comprises a fluid inlet 7 and a fluid outlet 8, wherein at least one mainstream channel 10 is arranged between the fluid inlet 7 and the fluid outlet 8, and an L-shaped baffle 11 is arranged on the axis line of the mainstream channel 10, wherein the tip of the L-shaped baffle 11 is located on the axis line of the mainstream channel 10, and the tip of the L-shaped baffle 11 is facing the side where the fluid inlet 7 is located, and the rear end 111 of the L-shaped baffle 11 is facing the side where the fluid outlet 8 is located; a jaw-shaped channel 9 is distributed on the side of the mainstream channel 10 in a mirrored manner.

[0041] Embodiment 2. This embodiment is a further limitation of the one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure described in Embodiment 1. The mainstream channel 10 is divided into a front end 101 and a rear end 102 by the L-shaped baffle 11. The front end 10-1 and the rear end 10-2 are located on the same axial line; the fluid inlet 7 is connected to the end of the front end 101, and the fluid outlet 8 is connected to the end of the rear end 102.

[0042] Embodiment 3: This embodiment further limits the one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure described in Embodiment 2, wherein the fluid inlet 7, the fluid outlet 8 and the mainstream channel 10 are located on the same axis.

[0043] Embodiment 4. This embodiment is a further limitation of the one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure described in Embodiment 1. One end of the jaw-shaped channel 9 is closed, namely the closed end 94, and the other end is connected to the mainstream channel 10, namely the open end 93. The closed end 94 of the jaw-shaped channel 9 faces the side where the fluid inlet 7 is located, and the open end 93 of the jaw-shaped channel 9 faces the side where the fluid outlet 8 is located.

[0044] Embodiment 5. This embodiment is a further limitation of the one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure described in embodiment 1. The angle between the guide edge of the jaw-shaped channel and the axis of the mainstream channel is α, and the angle between the return edge of the jaw-shaped channel and the axis of the mainstream channel is β, then β=2α.

[0045] Embodiment 6. This embodiment is a further limitation of the one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure described in Embodiment 1. The ratio of the length s of the return edge 91 of the jaw-shaped channel 9 to the length S of the guide edge 92 of the jaw-shaped channel 9 is S=1.93s.

[0046] Embodiment 7: This embodiment further limits the one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure described in Embodiment 1, and the ratio of the return side length to the guide side length of the jaw-shaped channel is in the range of 1.8 to 2.3.

[0047] Embodiment 8. This embodiment is a further limitation of the one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure described in Embodiment 1. The horizontal distance d=0.4D between the L-shaped baffle 11 and the jaw-shaped channel 9, where D is the width of the mainstream channel. The tip 111 of the L-shaped baffle 11 is located on the axis line of the mainstream channel 10, and the angle θ=66°.

[0048] Embodiment 9. This embodiment further limits the one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure described in embodiment 1, wherein the tip 111 of the L-shaped baffle 11 faces the side where the fluid inlet 7 is located, and the rear end 112 of the L-shaped baffle 11 faces the side where the fluid outlet 8 is located.

[0049] Embodiment 10. This embodiment further limits the one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure described in embodiment 1. The one-way fluid control device based on the L-shaped baffle and the mirrored jaw structure also includes a box body, and the front panel 1 and the rear panel 2 of the box body are parallel to each other, and the fluid inlet 7 and the fluid outlet 8 are symmetrically arranged on the front panel 1 and the rear panel 2, and the fluid inlet 7 and the fluid outlet 8 are arranged in multiple groups at intervals on the front panel 1 and the rear panel 2.

[0050] Implementation eleven: This implementation provides an example, which is used to explain the above implementations one to eight. The specific example is as follows:

[0051] See also Figures 1 to 11 To illustrate this embodiment, the method described in this embodiment includes the following steps:

[0052] The purpose of the present invention is to provide a one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure, which effectively limits fluid backflow. The device of the present invention has a simple structure, is easy to manufacture, has no mechanical moving parts inside, and can effectively avoid the mechanical aging and failure problems existing in traditional devices. The device specifically includes: a fluid inlet 7 and a fluid outlet 8, wherein:

[0053] At least one main flow channel 10 is arranged between the fluid inlet 7 and the fluid outlet 8, and a jaw-shaped channel 9 with one end connected to the main flow channel 10 and an open end and one end closed is distributed on both sides of the main flow channel 10 in a mirror-image manner, and the closed end of the jaw-shaped channel 9 faces the side where the fluid inlet 7 is located, and the open end of the jaw-shaped channel 9 faces the side where the fluid outlet 8 is located.

[0054] The one-way fluid control device based on an L-shaped baffle and a mirror-image jaw structure described in the present invention is intended to prevent fluid from flowing back in a fluid delivery system. The device is equivalent to a check valve and is suitable for gases such as air and liquids such as water and oil. The device can be installed between two sections of a fluid delivery pipeline, wherein a fluid inlet 7 and a fluid outlet 8 are connected to the two sections of the pipeline respectively. The fluid enters the device through the fluid inlet 7 and then flows from the fluid outlet 8 to the other section of the pipeline, while the unique structure of the device ensures that the fluid does not flow in the opposite direction, that is, the fluid is prevented from flowing back from the fluid outlet 8 to the fluid inlet 7.

[0055] In order to achieve the purpose of non-return, at least one main flow channel 10 is provided between the fluid inlet 7 and the fluid outlet 8 in the present embodiment. Figure 4 As shown, a schematic diagram of a main flow channel 10 is given, in which the fluid inlet 7 and the fluid outlet 8 are respectively connected to the two ends of the main flow channel 10; Figure 5 As shown, a schematic diagram of five main flow channels 10 is given, where the ends of the five main flow channels 10 are interconnected, and the fluid inlet 7 and the fluid outlet 8 are respectively located at the two ends of the five interconnected main flow channels 10.

[0056] In this embodiment, the jaw-shaped channels 9 are distributed on both sides of the main flow channel 10 in a mirror-symmetrical manner. Figure 4 As shown, the structure of the jaw-shaped channel 9 is the same, which has an open end and a closed end, and the open end is connected to the main channel 10, and the closed end is parallel to the main channel 10. In order to achieve a non-return effect, the closed end of the jaw-shaped channel 9 in this solution faces the side where the fluid inlet 7 is located, and the open end of the jaw-shaped channel 9 faces the side where the fluid outlet 8 is located. At the same time, at least one L-shaped baffle 11 is provided on the axis of the main channel 10, wherein the tip 111 of the L-shaped baffle 11 is located on the axis of the main channel 10, and its tip 111 faces the side where the fluid inlet 7 is located, and the rear end 112 of the L-shaped baffle 11 faces the side where the fluid outlet 8 is located.

[0057] In summary, after the fluid enters the main flow channel 10 from the fluid outlet 8, the fluid will hit the L-shaped baffle 11 and cannot pass directly. At this time, part of the fluid is guided into the mirror-symmetrical lower jaw-shaped channel 9. This part of the structure plays a role in diversion and deceleration, further increasing the flow resistance of the fluid, thereby effectively reducing the amount of fluid passing in the reverse direction from the fluid outlet 8 to the fluid inlet 7; when the lower jaw-shaped channel 9 is on the side of the main flow channel 10 and multiple L-shaped baffles 11 are set on the axis of the main flow channel 10, the kinetic energy of the fluid will be gradually consumed, thereby playing an effect of limiting backflow.

[0058] Similarly, the tip 111 of the L-shaped baffle 11 is directed toward the side where the fluid inlet 7 is located, and the rear end 11b is directed toward the side where the fluid outlet 8 is located. After the fluid enters the main flow channel 10 from the fluid inlet 7, due to the structural characteristics of the L-shaped baffle 11, the smooth shape from the tip 111 to the rear end 112 allows the fluid to be almost unobstructed, and the resistance loss through this path is small, thereby ensuring the smooth flow of the fluid, that is, it does not affect the forward flow of the fluid in the device from the fluid inlet 7 to the fluid outlet 8; preferably, the inner diameter of the main flow channel 10 is uniform, that is, the size is the same in any cross section, so as to reduce the resistance encountered by the fluid during forward flow.

[0059] like Figure 4 As shown, the mainstream channel 10 is divided into the front half 101 and the rear half 102 by the L-shaped baffle 11 as the boundary according to the positive flow trend. When the fluid flows in the mainstream channel 10 in the reverse direction, since the tip 111 of the L-shaped baffle 11 is located on the axis of the mainstream channel 10, and the tip 111 faces the side where the fluid inlet 7 is located, and the rear end 112 of the L-shaped baffle 11 faces the side where the fluid outlet 8 is located, the fluid hits the L-shaped baffle 11 and cannot pass directly. At this time, part of the fluid is guided from the open end 93 into the mirror-symmetrical jaw-shaped channel 9 structure, and the fluid enters the closed end 9d through the guide plate 92 and collides, generating a large number of turbulent vortices. When the fluid leaves the jaw-shaped channel 9 through the return plate 91, its flow direction is opposite to the flow direction of the fluid in the mainstream channel 10, generating turbulent collisions and consuming the flow kinetic energy of the fluid. Among them, the L-shaped baffle 11 structure plays a role in diversion and deceleration, further increasing the flow resistance of the fluid, thereby effectively reducing the reverse flow amount of the fluid.

[0060] In order to ensure that the resistance to the forward flow of the fluid in the mainstream channel 10 is small, and to ensure that the forward flow can smoothly pass through the L-shaped baffle 11 without being introduced into the lower jaw-shaped channel 9, the tip 111 of the L-shaped baffle 11 is at a distance d = 0.4D from the lower jaw-shaped channel 9 (wherein the width of the mainstream channel 10 is D); the tip 111 of the L-shaped baffle 11 is located on the axis line of the mainstream channel 10, and the angle θ is 66°. The device has an ideal effect in limiting the backflow of the fluid.

[0061] Optionally, the axial direction of the fluid inlet 7 is the same as the axial direction of the main flow channel 10 and the axial direction of the fluid outlet 8. Figures 3 to 5 As shown, the fluid inlet 7 , the mainstream channel 10 , and the fluid outlet 8 are located on the same axis. This structure facilitates the fluid to enter the mainstream channel 10 from the fluid inlet 7 , and also facilitates the fluid to flow out of the mainstream channel 10 from the fluid outlet 8 .

[0062] In this embodiment, the specific structure of the lower jaw channel 9 is as follows: Figure 4As shown, the lower jaw-shaped channel 9 includes a return plate 91, a guide plate 92, an open end 93 and a closed end 94. The open end 93 is connected to the main flow channel 10, and the closed end 94 is parallel to the axis of the main flow channel 10.

[0063] like Figure 4 In the embodiment shown, a lower jaw-shaped channel 9 is mirror-imaged on both sides of each mainstream channel 10, wherein the closed end 94 of the lower jaw-shaped channel 9 is parallel to the axial line of the mainstream channel 10, the open end 93 of the lower jaw-shaped channel 9 is connected to the mainstream channel 10, and the return edge 91 and the guide edge 92 of the lower jaw-shaped channel are both facing the side where the inlet 7 is located. This structure makes it difficult for the fluid to enter the lower jaw-shaped channel 9 when flowing forward in the mainstream channel 10, but can enter the lower jaw-shaped channel 9 when flowing reversely, and the fluid in the mainstream channel 10 is affected by the lower jaw-shaped channel 9.

[0064] The angle between the return edge 9a and the axis of the mainstream channel 10 is α, and the angle between the guide edge 9b and the axis of the mainstream channel 10 is β. When β=2α=30°; when the ratio of the length s of the return edge 9a to the length S of the guide edge 9b is S=1.93s, the effect of limiting reflux is more obvious.

[0065] Figures 1 to 3 A more specific application structure diagram of the device of the present invention is given. The device for limiting fluid reflux also includes a box body. For example, the box body can be a rectangular box body, including a front panel 1, a rear panel 2, a left side panel 5, an upper top plate 3, and a lower top plate 4. The front panel 1 and the rear panel 2 of the box body are parallel to each other. The fluid inlet 7 and the fluid outlet 8 are symmetrically arranged on the front panel 1 and the rear panel 2, and the fluid inlet 7 and the fluid outlet 8 are arranged in multiple groups on the front panel 1 and the rear panel 2 at intervals, such as Figure 3 As shown, there is a main flow channel 10 and a jaw-shaped channel 9 between each set of fluid inlet 7 and fluid outlet 8. The box can be applied to a ventilation window to allow indoor air to flow to the outside and prevent outside air from entering the room.

[0066] According to the above structure, the principle of the present invention is further described in conjunction with the accompanying drawings:

[0067] When the fluid flows in the forward direction, the fluid enters the device of the present invention through the fluid inlet 7 on the front panel 1. Since the direction of the tip 111 of the L-shaped baffle 11 is consistent with the direction of the fluid in the main channel 10 at this time, most of the fluid flows smoothly through the main channel 10 and is basically not affected by the resistance of the L-shaped baffle 11. The fluid finally flows out of the device from the fluid outlet 8 on the rear panel 2.

[0068] When the fluid flows in the reverse direction, the fluid enters the device of the present invention through the fluid outlet 8 on the rear panel 2. Since the tip 111 of the L-shaped baffle 11 is located on the axis of the mainstream channel 10, and the tip 111 faces the side where the fluid inlet 7 is located, and the rear end 112 of the L-shaped baffle 11 faces the side where the fluid outlet 8 is located, the fluid cannot pass directly after hitting the L-shaped baffle 11. At this time, part of the fluid is guided from the open end 93 into the mirror-symmetrical jaw-shaped channel 9 structure, and the fluid enters the closed end 9d through the guide plate 9b and collides, generating a large number of turbulent vortices. When it leaves the jaw-shaped channel 9 through the return plate 91, its flow direction is opposite to the flow direction of the fluid in the mainstream channel 10, generating turbulent collisions and consuming the flow kinetic energy of the fluid. The L-shaped baffle 11 structure plays a role in diversion and deceleration, further increasing the flow resistance of the fluid, thereby effectively reducing the reverse flow amount of the fluid.

[0069] The verification example is as follows:

[0070] In order to verify the non-return effect of the device on airflow, a numerical model was established according to actual usage. The size of the front and rear panels of the model is 220×220mm, the thickness is 142mm, and the fluid flow velocity during verification is 5m / s. By analyzing the pressure difference on both sides of the device, the difference in flow resistance pressure drop for two different flow modes of the present invention is verified. The calculation domain is set to be a 220×220×242mm cuboid, that is, the length and width dimensions are the same as the dimensions of the front and rear panels of the device of the present invention. The device of the present invention is placed in the middle of the calculation domain, and the front and rear panels are at equal distances from the boundaries on both sides of the calculation domain. Both sides of the calculation domain are set as the inflow and outflow boundary conditions of the fluid.

[0071] The gas flow involved in this verification is a low-speed flow with a Mach number less than 0.3, so the air can be regarded as an incompressible fluid; at the same time, the air flow temperature difference is not considered, so it can be considered that the indoor air flow conforms to the Boussinesq hypothesis. The turbulence model adopts the SST k-ω model. The spatial inviscid format uses the second-order upwind format, and the SIMPLE algorithm is used to solve the discrete equation. When the residual values ​​of the velocity term and the pressure term are both less than 10 -3 , and the residual values ​​of temperature and composition are both less than 10 -6 When , the control equations converge, and the velocity and pressure distributions at each position in the computational domain can be obtained.

[0072] The final control equations are as follows:

[0073] Continuity equation:

[0074]

[0075] Momentum equation:

[0076]

[0077] Energy equation:

[0078]

[0079] Where u is the air velocity; k is the turbulent pulsation kinetic energy; T is the indoor air temperature; μ is the laminar dynamic viscosity coefficient; μ t is the turbulent dynamic viscosity coefficient; p is the air pressure; ρ is the air density; C p is the specific heat capacity of air at constant pressure; q is the heat flux density; β is the volume expansion coefficient of the fluid.

[0080] like Figure 6 As shown, air flows into the device of the present invention from the front panel of the device, the airflow is evenly distributed inside the device, and flows out from the other side evenly and stably. Figure 7 The local airflow velocity vector diagram shows that the airflow mainly moves in the main channel, and the airflow velocity in the jaw-shaped channel is extremely small, and there is almost no fluid in or out. Figure 8 It can be seen that the pressure distribution inside the device is relatively uniform, and there is no obvious pressure drop. After calculation, the pressure drop on both sides of the calculation domain is 775.28Pa.

[0081] like Fig. 9 As shown, the air flows into the device of the present invention from the rear panel of the device in the reverse direction, and the uniformity of the air flow inside the device is very poor. When the air flows out from the other side, the uniformity of the outflow direction is very low. Fig.10 The local airflow velocity vector diagram shows that there is a high-speed airflow in the mandibular channel, and the airflow in the mainstream channel collides violently with the airflow in the mandibular channel at the outlet of the mandibular channel. Fig.11 It can be seen that there is an obvious pressure gradient in the pressure distribution of the flow field inside the device, especially after the fluid collision, there is a significant pressure drop. After calculation, the pressure drop on both sides of the calculation domain is 2876.68Pa. Compared with the forward flow of the fluid, the pressure drop is increased by about 271%, which effectively plays a role in limiting the reverse flow of the fluid.

[0082] Those skilled in the art will appreciate that the above are only preferred embodiments of the present invention, and the various embodiments of the present disclosure and / or the features described in the claims may be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present disclosure. It is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or perform equivalent substitutions on some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

[0083] Although preferred embodiments of the present invention have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A one-way fluid control device based on an L-shaped baffle and a mirrored jaw structure, characterized in that: The one-way fluid control device comprises a fluid inlet (7) and a fluid outlet (8), at least one main flow channel (10) is arranged between the fluid inlet (7) and the fluid outlet (8), an L-shaped baffle (11) is arranged on the axis of the main flow channel (10), wherein the tip of the L-shaped baffle (11) is located on the axis of the main flow channel (10), and the tip of the L-shaped baffle (11) faces the side where the fluid inlet (7) is located, and the rear end (112) of the L-shaped baffle (11) faces the side where the fluid outlet (8) is located; and a lower jaw-shaped channel (9) is distributed on the side of the main flow channel (10) in a mirror-image manner.

2. The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure according to claim 1 is characterized in that: The main flow channel (10) is divided into a front end (101) and a rear end (102) by an L-shaped baffle (11), and the front end (101) and the rear end (102) are located on the same axial line; the fluid inlet (7) is connected to the end of the front end (101), and the fluid outlet (8) is connected to the end of the rear end (102).

3. The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure according to claim 2 is characterized in that: The fluid inlet (7), the fluid outlet (8) and the main flow channel (10) are located on the same axis.

4. The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure according to claim 1, characterized in that: The lower jaw-shaped channel (9) has one closed end, namely the closed end (94), and one end connected to the main flow channel (10), namely the open end (93), and the closed end (94) of the lower jaw-shaped channel (9) faces the side where the fluid inlet (7) is located, and the open end (93) of the lower jaw-shaped channel (9) faces the side where the fluid outlet (8) is located.

5. The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure according to claim 4 is characterized in that: The angle between the guide edge of the lower jaw-shaped channel and the axis of the main channel is α, and the angle between the return edge of the lower jaw-shaped channel and the axis of the main channel is β, so β=2α.

6. The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure according to claim 4, characterized in that: The ratio of the length s of the return edge (91) of the lower jaw-shaped channel (9) to the length S of the guide edge (92) of the lower jaw-shaped channel (9) is S=1.93s.

7. The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure according to claim 6, characterized in that: The ratio of the length of the return side to the length of the guide side of the lower jaw-shaped channel is in the range of 1.8 to 2.

3.

8. The one-way fluid control device based on the L-shaped baffle and mirror-image jaw structure according to claim 1, characterized in that: The horizontal distance between the L-shaped baffle (11) and the lower jaw-shaped channel (9) is d=0.4D, where D is the width of the mainstream channel. The tip (111) of the L-shaped baffle (11) is located on the axis of the mainstream channel (10), and the angle θ is 66°.

9. The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure according to claim 7, characterized in that: The tip (111) of the L-shaped baffle plate (11) faces the side where the fluid inlet (7) is located, and the rear end (112) of the L-shaped baffle plate (11) faces the side where the fluid outlet (8) is located.

10. The one-way fluid control device based on the L-shaped baffle and mirror-image jaw structure according to claim 1, characterized in that: The one-way fluid control device based on the L-shaped baffle and the mirror-image jaw structure also includes a box body, the front panel (1) and the rear panel (2) of the box body are parallel to each other, the fluid inlet (7) and the fluid outlet (8) are symmetrically arranged on the front panel (1) and the rear panel (2), and the fluid inlet (7) and the fluid outlet (8) are arranged in multiple groups at intervals on the front panel (1) and the rear panel (2).

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