High-performance fluid oscillator based on turbulent flow column structure

Abstract

The invention discloses a high-performance fluid oscillator based on a turbulent flow column structure. The high-performance fluid oscillator comprises an oscillator body, and the oscillator body is provided with a fluid oscillator inlet, an oscillator inlet channel, a mixing chamber, a mixing chamber inlet, a mixing chamber outlet, a feedback channel, a feedback channel inlet, a feedback channel outlet, an oscillator outlet channel, a fluid oscillator outlet and turbulent flow columns; the fluid oscillator inlet is communicated with the oscillator inlet channel; the oscillator inlet channel is communicated with the feedback channel outlet and the mixing chamber inlet; the mixing chamber inlet is communicated with the mixing chamber; the mixing chamber is communicated with the mixing chamber outlet, the feedback channel inlet and the oscillator outlet channel; and a unique turbulent flow column structure is arranged at the rear end of the oscillator outlet channel. The device does not need extra power, utilizes the Coendall effect, the backflow feedback effect and the Karman vortex street effect of the airflow to generate periodic large-amplitude up-and-down swinging airflow at an outlet of the device, and is simple in structure, small in size, large in jet flow deflection angle, convenient to operate, reliable in running and free of maintenance.

Description

Technical Field

[0001] The invention relates to a high-performance fluid oscillator based on a spoiler column structure, belonging to the technical field of building ventilation. Background Art

[0002] Building ventilation is an important technical means to create an artificial environment and effectively remove indoor heat and pollutants. In order to improve ventilation efficiency and reduce energy consumption, reasonable airflow organization and air supply parameters are crucial. At present, constant wind speed air supply is a common way of ventilation system, but it is easy to cause uneven indoor air mixing and the formation of vortex stagnation areas. This will not only cause heat and pollutants to accumulate in local areas and reduce air quality, but may also affect the comfort and health of personnel. For places where flammable and explosive gas leaks exist, the accumulation of local pollutants may even cause serious safety hazards such as explosions. Therefore, technical means are urgently needed to fundamentally eliminate airflow stagnation areas.

[0003] Existing fluid oscillators have a limited adjustment range of jet deflection angles, which makes it difficult to meet the needs of large space ventilation and sewage discharge environments. In addition, due to structural limitations, intermittent oscillations or poor oscillation effects are prone to occur. Therefore, designing a high-performance fluid oscillator based on a spoiler column structure can significantly increase the deflection angle range and improve oscillation stability, thereby solving the above technical problems, which has important innovative significance and practical application value. Summary of the invention

[0004] The purpose of the present invention is to provide a high-performance fluid oscillator to solve the problem in the prior art that the jet deflection angle is small and the indoor airflow stagnation area cannot be effectively eliminated; the fluid oscillator of the present invention is based on an internal wedge structure, a feedback structure and a spoiler column structure, can receive air supply from air conditioners under a certain pressure, and automatically generate a large-scale alternating deflection of the jet direction; the oscillator has the advantages of simple structure, no moving parts, small size, large air supply angle, convenient operation, reliable operation and maintenance-free; the stable gas introduced at the inlet of the fluid oscillator forms an up-and-down swinging non-steady-state airflow after flowing through the internal feedback channel, and the deflection angle of this airflow is further expanded through the spoiler column structure at the rear of the device, and finally sent into the room through the oscillator outlet to promote the uniformity of air flow and temperature mixing; the design can not only effectively remove indoor pollutants, but also significantly improve the thermal comfort of personnel, thereby improving the overall indoor air quality.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A high-performance fluid oscillator based on a spoiler column structure is arranged at the front end of a building air supply outlet, comprising an oscillator body, the oscillator body is provided with a fluid oscillator inlet, an oscillator inlet channel, a mixing chamber, a feedback channel, an oscillator outlet channel, a fluid oscillator outlet, and a spoiler column, the mixing chamber is connected with a mixing chamber inlet and a mixing chamber outlet, the feedback channel is provided with at least one and is correspondingly connected with a feedback channel inlet and a feedback channel outlet; the fluid oscillator inlet is connected with the oscillator inlet channel, and is used to introduce fresh air from the air conditioner into the fluid oscillator; the oscillator inlet channel is connected with the mixing chamber inlet and the feedback channel outlet, The inlet fresh air and the feedback airflow are mixed at the mixing chamber inlet and then sent into the mixing chamber, where the mixed airflow forms a vortex and completes periodic wall-attached switching flow; the mixing chamber outlet is connected with the feedback channel inlet and the oscillator outlet channel, a part of the mixed airflow in the mixing chamber flows into the feedback channel through the feedback channel inlet to form the feedback airflow, and flows back to the mixing chamber inlet through the feedback channel outlet to mix with the inlet fresh air; the spoiler column is horizontally placed between the oscillator outlet channel and the fluid oscillator outlet, the mixed airflow passes through the oscillator outlet channel, and forms an alternating shedding vortex behind the spoiler column, periodically and significantly changing the airflow direction.

[0007] Preferably, the shape of the spoiler column includes but is not limited to a cylinder or various prismatic structure columns.

[0008] Furthermore, the spoiler column is arranged on one side of the rear end of the oscillator outlet channel close to the outlet of the fluid oscillator, and the center axis of the spoiler column is arranged parallel to the outlet of the fluid oscillator.

[0009] Preferably, the cross-sections of the airflow channels of the fluid oscillator inlet, the oscillator inlet channel, the mixing chamber, the mixing chamber inlet, the mixing chamber outlet and the feedback channel include but are not limited to rectangles.

[0010] Furthermore, the mixing chamber is composed of a wedge-shaped structure at the mixing chamber entrance and a rectangular structure of the mixing chamber, and the wedge-shaped structure at the mixing chamber entrance is set at an angle with the corresponding plane, and the angle includes but is not limited to 60°.

[0011] Furthermore, the oscillator outlet channel is composed of a wedge-shaped structure, which is similar in size and opposite in direction to the mixing chamber inlet wedge-shaped structure. The wedge-shaped structure of the oscillator outlet channel is set at an angle to the corresponding plane, and the angle includes but is not limited to 45°.

[0012] Furthermore, the width of the oscillator inlet channel is D, the width of each cross section of the mixing chamber inlet is between 0.75D and 2D, the width of the mixing chamber outlet is in the range of 2D to 4D, and the shell thickness of the oscillator body is in the range of 0.5D to 6D, wherein the value range of D is between 1mm and 1m.

[0013] Preferably, the feedback airflow flows through three sections of rectangular parallelepiped structures in sequence, which are the feedback channel inlet, the feedback channel and the feedback channel outlet, and the lengths of the three sections of rectangular parallelepiped structures are designed according to actual needs.

[0014] Preferably, two feedback channels are provided in the oscillator body, respectively connecting the oscillator inlet channel, the mixing chamber, and the oscillator outlet channel, and the two feedback channels are symmetrically distributed.

[0015] Preferably, the outlet cross-section of the fluid oscillator includes but is not limited to a rectangle.

[0016] The high-performance fluid oscillator based on the spoiler column structure provided by the present invention has the following advantages:

[0017] 1. The high-performance fluid oscillator based on the spoiler column structure of the present invention can be directly connected to the air supply duct of the air conditioner as the indoor air supply terminal, and the air is supplied to the room through the outlet of the fluid oscillator, and the air supply direction can spontaneously realize a large-scale periodic deflection.

[0018] 2. The high-performance fluid oscillator based on the spoiler column structure of the present invention adopts spontaneous periodic jet angle deflection, avoids the use of mechanical equipment to adjust the air supply angle, and reduces equipment energy consumption compared with the same type of air supply device; at the same time, the present invention can maximize the jet deflection angle and create an indoor non-steady-state flow field.

[0019] 3. The high-performance fluid oscillator based on the spoiler column structure of the present invention forms alternating shedding vortices based on the Karman vortex street principle by arranging a unique spoiler column structure inside the oscillator outlet, and periodically and significantly changes the airflow direction, thereby achieving the maximum jet range within a limited volume, significantly affecting the indoor flow field of large-space buildings.

[0020] 4. The high-performance fluid oscillator based on the spoiler column structure of the present invention can automatically change the air supply direction after being connected to the air supply duct. It is easy to operate on site and does not require manual control, which improves the convenience of use.

[0021] 5. In the present invention, the inlet channel length and the outlet cross-sectional size are adjustable size parameters, which can be flexibly adjusted according to different on-site installation requirements; at the same time, the feedback channel length and the mixing chamber size directly affect the oscillation frequency of the fluid, and can also be adjusted accordingly according to the air supply requirements; this design ensures that the present invention can adapt to a variety of application scenarios and optimize the air supply effect and energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic cross-sectional structure diagram of a high-performance fluid oscillator based on a spoiler column structure provided by an embodiment of the present invention;

[0023] Figure 2 A top view of a high-performance fluid oscillator based on a spoiler column structure provided by an embodiment of the present invention;

[0024] In the figure:

[0025] 1-oscillator body; 2-fluid oscillator inlet; 3-oscillator inlet channel; 4-mixing chamber; 41-mixing chamber inlet; 42-mixing chamber outlet; 5-feedback channel; 51-feedback channel inlet; 52-feedback channel outlet; 6-oscillator outlet channel; 7-fluid oscillator outlet; 8-spoiler column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0027] Reference Figure 1 and Figure 2 A high-performance fluid oscillator based on a spoiler column 8 structure is installed at the front end of the indoor air outlet of a building, and includes an oscillator body 1. The oscillator body 1 can be made of common metal materials such as stainless steel plates, aluminum plates, galvanized steel plates, etc. according to actual needs. The oscillator body 1 structure adopts an integrated design to avoid on-site assembly and improve the convenience of maintenance and repair.

[0028] Reference Figure 1 and Figure 2 The oscillator body 1 is provided with a fluid oscillator inlet 2, an oscillator inlet channel 3, a mixing chamber 4, a feedback channel 5, an oscillator outlet channel 6, and a fluid oscillator outlet 7. The mixing chamber 4 is connected with a mixing chamber inlet 41 and a mixing chamber outlet 42. At least one feedback channel 5 is provided and is correspondingly connected with a feedback channel inlet 51 and a feedback channel outlet 52. In this embodiment, the feedback channels 5 are preferably symmetrically distributed with two, and the mixing chamber 4 is located between the two feedback channels 5.

[0029] The air flow channel cross-sections of the fluid oscillator inlet 2, oscillator inlet channel 3, mixing chamber 4, mixing chamber inlet 41, mixing chamber outlet 42, feedback channel 5 and fluid oscillator outlet 7 include but are not limited to rectangles. In this embodiment, the cross-section of each air flow channel is preferably rectangular and the size is designed according to actual needs.

[0030] The mixing chamber 4 is composed of a wedge-shaped structure of a mixing chamber inlet 41 and a rectangular structure of the mixing chamber 4. The wedge-shaped structure of the mixing chamber inlet 41 is set at an angle with the corresponding plane, and the angle includes but is not limited to 60°; the oscillator outlet channel 6 is composed of a wedge-shaped structure, and the wedge-shaped structure of the oscillator outlet channel 6 is similar in size to the wedge-shaped structure of the mixing chamber inlet 41 and in the opposite direction. The wedge-shaped structure of the oscillator outlet channel 6 is set at an angle with the corresponding plane, and the angle includes but is not limited to 45°; the feedback airflow flows through three sections of rectangular structures in sequence, namely the feedback channel inlet 51, the feedback channel 5 and the feedback channel outlet 52, and the lengths of the three sections of the rectangular structures are designed according to actual needs.

[0031] The fluid oscillator inlet 2 is connected with the oscillator inlet channel 3, which is used to introduce the air-conditioning fresh air into the fluid oscillator; the oscillator inlet channel 3 is connected with the mixing chamber inlet 41 and the feedback channel outlet 52 of the two feedback channels 5, so that the air-conditioning fresh air and the feedback airflow are mixed at the mixing chamber inlet 41 and then sent into the mixing chamber 4. In the mixing chamber 4, the airflow will adhere to the wall after it is stabilized, generating vortices. The vortices advance forward at the wedge-shaped structure corners of the mixing chamber 4, realizing regular wall-attached switching flow. Part of the airflow enters the feedback channel inlet 51 through the mixing chamber outlet 42, and then flows into the feedback channel 5, and finally returns to the mixing chamber inlet 41 through the feedback channel outlet 52, forming an oscillation phenomenon of the airflow; the mixing chamber outlet 42 is connected with the feedback channel inlets 51 of the two feedback channels 5 and the oscillator outlet channel 6, and part of the airflow acts on the mixing chamber inlet 41 through the feedback channel 5 to continue the vortex, and the other part of the airflow is directly discharged through the oscillator outlet channel 6.

[0032] Reference Figure 1 and Figure 2 , a high-performance fluid oscillator based on the structure of spoiler column 8, further comprising spoiler column 8, spoiler column 8 is horizontally placed between oscillator outlet channel 6 and fluid oscillator outlet 7, and is located at the rear end of oscillator outlet channel 6 near the side of fluid oscillator outlet 7, spoiler column 8 shape includes but is not limited to cylinder or various prismatic structure columns, spoiler column 8 column axis parallel to the fluid oscillator outlet 7, gas discharged from oscillator outlet channel 6 is sent into the room through spoiler column 8, according to the Karman vortex street principle, both sides of spoiler column 8 will periodically fall off rotating vortices in opposite directions, forming regular double-row line vortices, interfering with each other and enhancing the disturbance effect, thereby expanding the disturbance range, the process continues to cycle, so that the vortex moves inside the fluid oscillator, and finally forms an airflow with a certain periodicity and large swing up and down at the air supply port. In addition, the connection of the internal components of the fluid oscillator adopts a specific angle, rather than a smooth arc, to promote the generation of vortices after the fluid collides with the wall surface, and this design effectively enhances the mixing and dynamic characteristics of the airflow.

[0033] Reference Figure 2The width of the oscillator inlet channel 3 is D, the width of each cross section of the mixing chamber inlet 41 is between 0.75D and 2D, the width of the mixing chamber outlet 42 is in the range of 2D to 4D, and the shell thickness of the oscillator body 1 is in the range of 0.5D to 6D, where the value range of D is between 1mm and 1m.

[0034] In an optional embodiment of the present invention, the size of the fluid oscillator involved is strictly in accordance with Figure 2 The following is a preferred size: the high-performance fluid oscillator is 530 mm long and 280 mm wide, the size of the fluid oscillator inlet 2 is 40×120 mm, the size of the mixing chamber inlet 41 is 60×120 mm, the wedge-shaped structure of the mixing chamber inlet 41 should be at an angle of 60° to the corresponding plane, the size of the mixing chamber outlet 42 is 100×120 mm, the size of the feedback channel inlet 51 is 40×120 mm, the size of the feedback channel outlet 52 is 40×120 mm, the size of the oscillator outlet channel 6 is 120×120 mm, the size of the fluid oscillator outlet 7 is 60×120 mm, the wedge-shaped structure of the fluid oscillator outlet 7 is at an angle of 45° to the corresponding plane, and the spoiler column 8 at the rear end of the oscillator outlet channel 6 is preferably a cylinder with a diameter of 6 mm, and the distance between the central axis of the cylinder and the oscillator air supply port is 6 mm.

[0035] Compared with the traditional fluid oscillator without the structure of the spoiler column 8, the high-performance fluid oscillator involved in this embodiment can promote the airflow to deflect up and down by an angle of 16.5° and the downward deflection angle by 15.4°. For the traditional fluid oscillator of the same size without the added cylindrical structure, the upward deflection angle of the jet airflow is 3.5° and the downward deflection angle is 3.8°. Therefore, the preferred embodiment provided by the present invention can increase the jet range by nearly 3.4 times after testing, maximize the disturbance effect on the indoor flow field, and further improve the comfort of indoor personnel.

[0036] The length, width and height of the large space building involved in the preferred size are all 10 meters. There are 5 rectangular wind tunnel-style air supply vents in the room, which are 5 meters high on the left side of the room. At the same time, there is a rectangular exhaust vent, which is 4 meters high on the right side of the room and is dedicated to discharging indoor air. The fluid oscillator inlet 2 is connected to the air supply vent, the fluid oscillator outlet 7 is connected to the indoor space, and the exhaust vent is directly connected to the outdoors. When the air supply vent provides fresh air, a non-steady-state airflow that periodically swings up and down will be generated inside the fluid oscillator, and it will be transported into the room through the fluid oscillator outlet 7. After being fully mixed with the indoor air, it will be discharged to the outdoors through the exhaust vent. There is no need to set up an additional diffuser at the air supply vent, only corresponding holes need to be opened on the wall to achieve smooth entry and distribution of airflow.

[0037] According to the high-performance fluid oscillator based on the spoiler column 8 structure involved in this embodiment, it is arranged at the air outlet of the building:

[0038] By setting up a polluted gas release source in the center of the room and comparing the air supply with and without an oscillator, it can be found that the air supply outlet equipped with a fluid oscillator significantly accelerates the flow field disturbance effect and promotes full mixing of the air, thereby reducing the accumulation of high-concentration polluted gases indoors and significantly improving indoor ventilation efficiency. When the room is heated and ventilated in cold seasons, the installation of a fluid oscillator dynamic air supply device can effectively eliminate the thermal stratification phenomenon. The device can fully mix the hot air at the top of the room and bring it into the breathing area of ​​​​the personnel, which not only reduces energy consumption, but also improves the comfort of the human body.

[0039] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-performance fluid oscillator based on a spoiler column structure, arranged at the front end of a building air outlet, characterized in that: The oscillator body comprises an oscillator body, on which a fluid oscillator inlet, an oscillator inlet channel, a mixing chamber, a feedback channel, an oscillator outlet channel, a fluid oscillator outlet, and a spoiler column are provided. The mixing chamber is connected with a mixing chamber inlet and a mixing chamber outlet. The feedback channel is provided with at least one and is correspondingly connected with a feedback channel inlet and a feedback channel outlet. The fluid oscillator inlet is connected to the oscillator inlet channel, and is used to introduce air-conditioning fresh air into the fluid oscillator; the oscillator inlet channel is connected to the mixing chamber inlet and the feedback channel outlet, and the inlet fresh air and the feedback airflow are mixed at the mixing chamber inlet and then sent into the mixing chamber, and the mixed airflow forms a vortex in the mixing chamber, completing the periodic wall-attached switching flow; The outlet of the mixing chamber is connected to the inlet of the feedback channel and the outlet channel of the oscillator. A part of the mixed airflow in the mixing chamber flows into the feedback channel through the inlet of the feedback channel to form the feedback airflow, and flows back to the inlet of the mixing chamber through the outlet of the feedback channel to complete mixing with the inlet fresh air. The spoiler column is horizontally placed between the oscillator outlet channel and the fluid oscillator outlet. The mixed airflow passes through the oscillator outlet channel and forms alternating shedding vortices behind the spoiler column, which periodically and significantly changes the airflow direction.

2. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 1, characterized in that: The shape of the spoiler column includes but is not limited to a cylinder or various prismatic structure columns.

3. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 2, characterized in that: The spoiler column is arranged on one side of the rear end of the oscillator outlet channel close to the outlet of the fluid oscillator, and the center axis of the spoiler column is arranged parallel to the outlet of the fluid oscillator.

4. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 1, characterized in that: The cross-sections of the airflow channels of the fluid oscillator inlet, the oscillator inlet channel, the mixing chamber, the mixing chamber inlet, the mixing chamber outlet and the feedback channel include but are not limited to rectangles.

5. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 4, characterized in that: The mixing chamber is composed of a wedge-shaped structure at the mixing chamber entrance and a rectangular structure of the mixing chamber. The wedge-shaped structure at the mixing chamber entrance is arranged at an angle with the corresponding plane, and the angle includes but is not limited to 60°.

6. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 5, characterized in that: The oscillator outlet channel is composed of a wedge-shaped structure, which is similar in size and opposite in direction to the mixing chamber inlet wedge-shaped structure. The wedge-shaped structure of the oscillator outlet channel is set at an angle to the corresponding plane, and the angle includes but is not limited to 45°.

7. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 5, characterized in that: The width of the oscillator inlet channel is D, the width of each cross section of the mixing chamber inlet is between 0.75D and 2D, the width of the mixing chamber outlet is in the range of 2D to 4D, and the shell thickness of the oscillator body is in the range of 0.5D to 6D, wherein the value range of D is between 1mm and 1m.

8. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 1, characterized in that: The feedback airflow flows through three sections of rectangular parallelepiped structures in sequence, which are the feedback channel inlet, the feedback channel and the feedback channel outlet, and the lengths of the three sections of rectangular parallelepiped structures are designed according to actual needs.

9. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 1, characterized in that: The oscillator body is provided with two feedback channels, which are respectively connected to the oscillator inlet channel, the mixing chamber and the oscillator outlet channel, and the two feedback channels are symmetrically distributed.

10. A high-performance fluid oscillator based on a spoiler column structure as claimed in claim 1, characterized in that: The cross-section of the fluid oscillator outlet includes but is not limited to a rectangle.

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