CN113465074B - Vortex ring air supply device with high fresh air quantity - Google Patents
Vortex ring air supply device with high fresh air quantity Download PDFInfo
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- CN113465074B CN113465074B CN202110837255.3A CN202110837255A CN113465074B CN 113465074 B CN113465074 B CN 113465074B CN 202110837255 A CN202110837255 A CN 202110837255A CN 113465074 B CN113465074 B CN 113465074B
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- 239000012530 fluid Substances 0.000 abstract description 9
- 238000010008 shearing Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 170
- 230000007613 environmental effect Effects 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a vortex ring air supply device with high fresh air quantity, which comprises a vortex ring generating cylinder, wherein a driving piston is coaxially arranged in the top of the vortex ring generating cylinder, and a fresh air storage cylinder is coaxially and fixedly arranged outside the bottom of the vortex ring generating cylinder; the vortex ring generating cylinder comprises a vortex ring generating cylinder body, and the bottom end opening of the vortex ring generating cylinder body is a vortex ring outlet; the space in the vortex ring generating cylinder body is a main cavity; the main cavity is divided into an upper half and a lower half by a movable cover plate of the driving piston, the upper half of the main cavity is a sealed piston movable cavity, and the lower half of the main cavity is a vortex ring generating cavity with an open bottom. According to the vortex ring air supply device with high fresh air quantity, the driving piston is adopted to drive the fresh air in the vortex ring generating cylinder to flow, the fresh air storage cylinder is arranged outside the vortex ring generating cylinder, when the fresh air in the vortex ring generating cylinder flows to the outlet of the vortex ring, the shearing layer of the fresh air fluid can be separated and can simultaneously roll the fresh air in the fresh air storage cylinder, and the fresh air carrying capacity in the vortex ring is improved.
Description
Technical Field
The invention belongs to the field of air ventilation, relates to a vortex ring air supply device, and in particular relates to a vortex ring air supply device with high fresh air quantity.
Background
For people working indoors for a long time, the comfort of the indoor environment is a key factor for ensuring the normal work of the staff. Various forms of ventilation are thus applied depending on their working environment, in order to fill the requirements of personnel for the thermal comfort of the working environment. In the case of the personalized air supply system, the current personalized air supply port has to be placed at a position close to a human breathing zone due to the limitation of jet flow, namely, the jet flow is sucked and mixed after being sprayed out from a jet nozzle, so that the jet flow section is continuously enlarged, the flow speed is continuously reduced, the flow is increased along the flow path, and the fresh air dissipation is more.
The personalized air supply system in the prior art mainly has the following defects: firstly, the whole system pipeline is complex in arrangement, high in installation cost and occupies the space of a working area; secondly, the corresponding adjustment is difficult to be made according to the position of the personnel, and the flexibility is poor. To the defect, if the conveying form of the fresh air is changed into the form of the vortex ring, long-distance conveying of the fresh air can be realized by virtue of the advantages of the vortex ring, namely, the structure is stable, dissipation is not easy to realize.
However, when the vortex ring is applied to a personalized air supply system, the existing researches show that the vortex ring can entrain a large amount of environmental fluid in the generation stage, so that fresh air in the cavity is mutually mixed with the environmental fluid in the vortex ring generation stage, and when the vortex ring is completely generated and sent to a human breathing zone, the requirements of personnel cannot be met due to insufficient fresh air carrying capacity.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the vortex ring air supply device with high fresh air quantity, and solves the technical problem that the vortex ring air supply device in the prior art is insufficient in fresh air carrying capacity during air supply.
In order to solve the technical problems, the invention adopts the following technical scheme:
The vortex ring air supply device with high fresh air quantity comprises a vortex ring generating cylinder, wherein a driving piston is coaxially arranged in the top of the vortex ring generating cylinder, and a fresh air storage cylinder is coaxially and fixedly arranged outside the bottom of the vortex ring generating cylinder;
the vortex ring generating cylinder comprises a vortex ring generating cylinder body, and a vortex ring outlet is formed in the bottom end opening of the vortex ring generating cylinder body; the space in the vortex ring generating cylinder body is a main cavity; the main cavity is divided into an upper half part and a lower half part by the movable cover plate of the driving piston, the upper half part of the main cavity is a sealed piston movable cavity, and the lower half part of the main cavity is a vortex ring generating cavity with an open bottom end;
The vortex ring generating cylinder body is provided with a first new wind inlet hole along the radial direction, the first new wind inlet hole is communicated with the vortex ring generating cavity, and a one-way air inlet valve is arranged at the first new wind inlet hole;
The fresh air storage cylinder comprises a fresh air storage cylinder body, the top opening of the fresh air storage cylinder body is a vortex ring generation cylinder mounting hole, and the bottom opening of the fresh air storage cylinder body is a vortex ring fresh air supply opening;
The vortex ring generating cylinder body is arranged in the vortex ring generating cylinder mounting hole, the bottom end of the vortex ring generating cylinder body extends into the fresh air storage cylinder body, and the space in the fresh air storage cylinder body is a vortex ring fresh air mixing cavity;
The top end of the fresh air storage cylinder body, which is positioned around the vortex ring generation cylinder body, is provided with a second fresh air inlet hole along the axial direction, and the second fresh air inlet hole is communicated with the vortex ring fresh air mixing cavity; the second fresh air inlet hole is positioned below the first fresh air inlet hole, and the axial extension line of the second fresh air inlet hole is perpendicular to and intersected with the radial extension line of the first fresh air inlet hole;
the first fresh air inlet hole and the second fresh air inlet hole are communicated with the blower.
The invention also has the following technical characteristics:
The driving piston comprises a fixed cover plate, the fixed cover plate is fixedly arranged at the top end of the vortex ring generating cylinder, the top end of the vortex ring generating cylinder is completely closed by the fixed cover plate, the top end of a cylinder is fixedly arranged on the lower surface of the fixed cover plate, the top end of a piston rod is arranged in the cylinder, a movable cover plate is arranged at the bottom end of the piston rod, and the movable cover plate can move in the vortex ring generating cylinder along the axial direction under the driving of the cylinder.
The middle of the upper surface of the fixed cover plate is fixedly provided with a handle.
The inner wall of the vortex ring generating cylinder is fixedly provided with a one-way fan blade plate, and the one-way fan blade plate is positioned between the first fresh air inlet hole and the vortex ring outlet; the one-way fan blade plate divides the vortex ring generating cavity into an upper half part and a lower half part, the upper half part of the vortex ring generating cavity is a vortex ring protecting cavity, and the lower half part of the vortex ring generating cavity is a vortex ring output cavity.
The one-way fan blade plate is positioned below the scroll ring generating cylinder mounting hole.
The unidirectional fan blade plate is provided with a plurality of fan blades, one side of each fan blade is a movable side, the other side of each fan blade is rotatably arranged on a fan blade shaft, and the fan blade shaft is fixedly arranged on the unidirectional fan blade plate; the fan blade can overturn downwards along the axial direction around the fan blade shaft.
The vortex ring outlet and the vortex ring fresh air supply opening are provided with variable caliber structures, each variable caliber structure comprises a plurality of variable caliber sheets arranged along the tangential direction, the adjacent variable caliber sheets are mutually overlapped, and the variable caliber sheets form an adjustable opening with adjustable inner diameter; the adjustable port realizes the adjustment of the inner diameter through the clutch movement of a plurality of variable diameter plates.
The middle part of the fresh air storage cylinder body is a telescopic cylinder body, and the telescopic cylinder body can perform telescopic movement along the axial direction.
The inner wall of the fresh air storage cylinder is provided with a first controller sensor and a second controller; the telescopic cylinder is connected with the input end and the output end of the first controller, the output end of the first controller is connected with the input end of the sensor, the output end of the sensor is connected with the input end of the second controller, and the output end of the second controller is connected with the variable diameter sheet.
Compared with the prior art, the invention has the following technical effects:
According to the vortex ring air supply device with high fresh air quantity, the driving piston is used for driving the vortex ring to generate fresh air flow in the cylinder, the fresh air storage cylinder is arranged outside the cylinder, when the fresh air in the cylinder flows to the outlet of the vortex ring, the shearing layer of the fresh air fluid can be separated and can simultaneously roll the fresh air in the fresh air storage cylinder, and the fresh air carrying capacity in the vortex ring is improved.
And (II) the vortex ring air supply device with high fresh air quantity is provided with the variable caliber structure at the vortex ring outlet and the vortex ring fresh air supply opening, and the structure can realize the adjustment of the outlet section of the vortex ring outlet and the vortex ring fresh air supply opening and the interval between the outlet section and the vortex ring outlet and the vortex ring fresh air supply opening so as to meet different air supply requirements of users.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a vortex ring air supply device with high fresh air quantity.
Fig. 2 is a front view of a high fresh air volume vortex ring blower.
Fig. 3 is a cross-sectional view of a high fresh air volume vortex ring blower.
Fig. 4 is a schematic structural view of a unidirectional fan blade.
Fig. 5 is a schematic diagram of a variable caliber structure.
Fig. 6 shows the results of a simulation test of the high fresh air volume vortex ring blower in the example.
FIG. 7 is a simulation test result of a conventional vortex ring blower in the embodiment.
The meaning of each reference numeral in the figures is: 1-a vortex ring generating cylinder, 2-a driving piston, 3-a fresh air storage cylinder, 4-a one-way fan blade plate and 5-a variable caliber structure;
101-vortex ring generating cylinder body, 102-vortex ring outlet, 103-main cavity, 104-first fresh air inlet hole, 105-one-way air inlet valve;
201-a fixed cover plate, 202-a cylinder, 203-a piston rod, 204-a movable cover plate, 205-a handle and 206-a threaded through hole;
301-a fresh air storage cylinder body, 302-a vortex ring generation cylinder mounting hole, 303-a vortex ring fresh air supply port, 304-a vortex ring fresh air mixing cavity, 305-a second fresh air inlet hole and 306-a telescopic cylinder body;
401-fan blades, 402-fan blade shafts;
501-reducing tablets, 502-adjustable ports;
10301-piston moving cavity, 10302-vortex ring generating cavity;
1030201-vortex ring protection cavity, 1030202-vortex ring output cavity.
The following examples illustrate the invention in further detail.
Detailed Description
Because the vortex ring can carry a large amount of environmental fluid in the generation stage, the fresh air carrying capacity is insufficient, and the personnel requirements cannot be met. If the new air quantity of the vortex ring generating cavity is increased, the new air quantity required by generating a single vortex ring under certain conditions is certain, and the required requirement cannot be met; if the generation frequency of the vortex ring is increased, the phenomenon that adjacent vortex rings interact possibly occurs, so that the vortex ring is broken, and the fresh air delivery is not facilitated.
Therefore, the invention discloses a high-fresh-air-volume vortex ring air supply device, which utilizes the great carrying effect of a vortex ring on environmental fluid in the generation process, and by identifying the carrying space of the vortex ring on the surrounding environmental fluid in the generation process, the periphery of an original vortex ring generation cavity is additionally provided with an auxiliary cavity for strengthening the fresh air volume of the vortex ring in the generation stage so as to improve the fresh air carrying capacity of the vortex ring in the transportation process.
All parts in the present invention are known in the art, unless otherwise specified.
In the invention, the following components are added:
The blower is a blower known in the art.
The first controller and the second controller are controllers known in the art.
The sensor is a sensor known in the art.
The conventional swirl ring air supply device refers to a conventional swirl ring air supply device known in the prior art.
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present application fall within the protection scope of the present application.
Examples:
The embodiment provides a vortex ring air supply device with high fresh air quantity, which comprises a vortex ring generating cylinder 1, wherein a driving piston 2 is coaxially arranged in the top of the vortex ring generating cylinder 1, and a fresh air storage cylinder 3 is coaxially and fixedly arranged outside the bottom of the vortex ring generating cylinder 1;
The vortex ring generating cylinder 1 comprises a vortex ring generating cylinder body 101, and a vortex ring outlet 102 is arranged at the bottom end opening of the vortex ring generating cylinder body 101; the space in the vortex ring generating cylinder body 101 is a main cavity 103; the main cavity 103 is divided into an upper half and a lower half by the movable cover plate 204 of the driving piston 2, the upper half of the main cavity 103 is a sealed piston movable cavity 10301, and the lower half of the main cavity 103 is a vortex ring generating cavity 10302 with an open bottom end;
the vortex ring generating cylinder body 101 is provided with a first new air inlet hole 104 along the radial direction, the first new air inlet hole 104 is communicated with the vortex ring generating cavity 10302, and a one-way air inlet valve 105 is arranged at the first new air inlet hole 104;
The fresh air storage cylinder 3 comprises a fresh air storage cylinder body 301, wherein the top opening of the fresh air storage cylinder body 301 is a vortex ring generation cylinder mounting hole 302, and the bottom opening of the fresh air storage cylinder body 301 is a vortex ring fresh air supply opening 303;
The vortex ring generating cylinder body 101 is arranged in the vortex ring generating cylinder mounting hole 302, the bottom end of the vortex ring generating cylinder body 101 extends into the fresh air storage cylinder body 301, and the space in the fresh air storage cylinder body 301 is a vortex ring fresh air mixing cavity 304;
The top end of the fresh air storage cylinder body 301 around the vortex ring generation cylinder body 101 is provided with a second fresh air inlet hole 305 along the axial direction, and the second fresh air inlet hole 305 is communicated with the vortex ring fresh air mixing cavity 304; the second fresh air inlet hole 305 is positioned below the first fresh air inlet hole 104, and the axial extension line of the second fresh air inlet hole 305 is perpendicular to and intersected with the radial extension line of the first fresh air inlet hole 104;
the first fresh air intake 104 and the second fresh air intake 305 are in communication with the blower.
As a specific scheme of this embodiment, the driving piston 2 includes a fixed cover plate 201, the fixed cover plate 201 is fixedly installed at the top end of the vortex ring generating cylinder 1, the fixed cover plate 201 completely seals the top end of the vortex ring generating cylinder 1, the top end of a cylinder 202 is fixedly installed on the lower surface of the fixed cover plate 201, the top end of a piston rod 203 is installed in the cylinder 202, a movable cover plate 204 is installed at the bottom end of the piston rod 203, and the movable cover plate 204 can move in the vortex ring generating cylinder 1 along the axial direction under the driving of the cylinder 202.
In this embodiment, the movable cover 204 of the driving piston 2 should not move beyond the position of the first fresh air intake hole 104.
As a specific solution of this embodiment, a handle 205 is fixedly provided on the upper surface of the fixed cover 201. In this embodiment, the handle 205 is convenient for disassembling the fixed cover 201, and the fixed cover 201 is further provided with a plurality of threaded through holes 206, which can be tightly fixed on the top end of the vortex ring generating cylinder 1 by adopting a bolt fixing manner.
As a specific scheme of the embodiment, a one-way fan blade plate 4 is fixedly arranged on the inner wall of the vortex ring generating cylinder 1, and the one-way fan blade plate 4 is positioned between the first fresh air inlet 104 and the vortex ring outlet 102; the unidirectional fan blade 4 divides the vortex ring generating chamber 10302 into an upper half and a lower half, the upper half of the vortex ring generating chamber 10302 is a vortex ring protecting chamber 1030201, and the lower half of the vortex ring generating chamber 10302 is a vortex ring outputting chamber 1030202.
As a specific aspect of the present embodiment, the one-way fan blade 4 is located below the scroll generating cylinder mounting hole 302.
As a specific scheme of the embodiment, a plurality of fan blades 401 are arranged on the unidirectional fan blade plate 4, one side of each fan blade 401 is a movable side, the other side of each fan blade 401 is rotatably arranged on a fan blade shaft 402, and the fan blade shaft 402 is fixedly arranged on the unidirectional fan blade plate 4; the fan blades 401 can be turned axially downwards around a fan blade shaft 402.
In this embodiment, the unidirectional fan blade 4 can avoid sucking external environmental fluid when driving the piston 2 to return, and the unidirectional fan blade 4 is disposed between the scroll mounting hole 302 and the scroll outlet 102, so that adverse effects on scroll generation caused by the structure of the unidirectional fan blade 4 itself can be avoided.
As a specific scheme of the embodiment, a variable caliber structure 5 is arranged at the vortex ring outlet 102 and the vortex ring fresh air supply outlet 303, the variable caliber structure 5 comprises a plurality of variable caliber sheets 501 arranged along the tangential direction, the adjacent variable caliber sheets 501 are overlapped with each other, and an adjustable opening 502 with adjustable inner diameter is formed by surrounding the plurality of variable caliber sheets 501; the adjustable port 502 enables adjustment of the inner diameter by the clutching movement of the plurality of variable diameter plates 501; in this embodiment, the clutch movement of the variable diameter plate 501 may be manually controlled, and the variable diameter structure 5 may be capable of adjusting the air flow rate per unit time at the vortex ring outlet 102 and the vortex ring fresh air supply outlet 303.
As a specific scheme of the embodiment, the middle part of the fresh air storage barrel 301 is a telescopic barrel 306, and the telescopic barrel 306 can perform telescopic movement along the axial direction; in this embodiment, the telescopic movement of the telescopic cylinder 306 can be controlled manually; the size of the vortex ring fresh air mixing chamber 304 can be adjusted by the telescopic cylinder 306.
As a specific scheme of the embodiment, a first controller, a sensor and a second controller are arranged on the inner wall of the fresh air storage barrel 3; the telescopic cylinder 306 is connected with the input end and the output end of the first controller, the output end of the first controller is connected with the input end of the sensor, the output end of the sensor is connected with the input end of the second controller, and the output end of the second controller is connected with the variable diameter sheet 501.
In this embodiment, the first controller can control the telescopic movement of the telescopic cylinder 306, the displacement of the telescopic movement in the axial direction can be converted into an electrical signal by the first controller, the electrical signal is input to the variable diameter plate 501 via the sensor, the clutch degree of the variable diameter plate 501 can be controlled, and the larger the length of the telescopic cylinder 306 is, the smaller the clutch degree of the variable diameter plate 501 is, and the larger the caliber of the adjustable port 502 is.
In this embodiment, the telescopic movement of the telescopic cylinder 306 changes the size of the vortex ring fresh air mixing cavity 304, and the caliber size of the variable caliber structure 5 is always matched with the vortex ring fresh air mixing cavity 304, so that the proper air flow per unit time is ensured to be maintained at the vortex ring outlet 102 and the vortex ring fresh air supply outlet 303.
The working process of the invention is as follows:
first, the driving piston 2 is mounted in the top of the vortex ring generating cylinder 1, the fresh air storage cylinder 3 is fixed outside the bottom of the vortex ring generating cylinder 1 by welding, and the first fresh air inlet 104 and the second fresh air inlet 305 are communicated with the blower.
Second, after the above-mentioned installation process is completed, the one-way air inlet valve 105 is opened, the blower and the cylinder 202 are started, and the fresh air flow sent by the blower enters the vortex ring generating cavity 10302 from the first fresh air inlet hole 104, and meanwhile, the movable cover plate 204 of the driving piston 2 moves downwards in the axial direction in the piston movable cavity 10301 under the driving of the cylinder 202, and the fresh air flow in the vortex ring generating cavity 10302 flows to the vortex ring outlet 102 under the pressure of the movable cover plate 204.
Third, when the fresh air flow in the vortex ring generating chamber 10302 flows to the vortex ring outlet 102, the bottom end of the vortex ring generating cylinder body 101 is in an overpressure state, that is, the pressure is higher than the normal pressure, so that the fluid shear layer of the fresh air flow separates and draws the surrounding fresh air flow to form the vortex ring.
Fourth, after the vortex ring is formed, the fresh air enters the vortex ring fresh air mixing cavity 304 from the outlet 102 of the vortex ring through the one-way fan blade plate 4, the vortex ring fresh air mixing cavity 304 contains a large amount of fresh air flow input from the second fresh air inlet hole 305, after the fresh air flow is mixed with the vortex ring, a high fresh air volume vortex ring is formed, the high fresh air volume vortex ring continues to flow by virtue of the self induction speed, and finally flows from the vortex ring fresh air supply outlet 303 to the external environment.
Fifth, when the piston 2 is driven to return upwards in the axial direction, the dirty air flow from the external environment enters the vortex ring fresh air mixing cavity 304 from the vortex ring fresh air supply outlet 303, and when the dirty air flow flows to the unidirectional fan blade 4, the unidirectional fan blade 4 can block the dirty air flow because the fan blade 401 cannot overturn upwards in the axial direction, so that the dirty air flow cannot enter the vortex ring generating cavity 10302 and the vortex ring fresh air mixing cavity 304, and the air flow in the vortex ring generating cavity 10302 and the vortex ring fresh air mixing cavity 304 is prevented from being polluted.
Sixthly, according to actual requirements, the entrainment space of the high-fresh-air-volume vortex ring in the generation stage can be adjusted, and the first controller is started to enable the telescopic cylinder 306 to perform telescopic movement, the displacement of the telescopic movement in the axial direction can be converted into an electric signal by the first controller, and the electric signal is input to the variable-diameter sheet 501 through the sensor; the greater the length of the telescoping cylinder 306, the less the variable diameter plate 501 is clutched and the smaller the caliber of the adjustable orifice 502.
Simulation test:
The simulation test was performed using the above-described high fresh air volume swirl ring air-supplying device as a test group and using a conventional swirl ring air-supplying device as a control group, and the results are shown in fig. 6 and 7.
The specific parameters of the simulation test are as follows:
In the simulation test, the wind flow is divided into two parts, one part is fresh air flow, and the set area is in the vortex ring generation cavity 10302 and the vortex ring fresh air mixing cavity 304; the other part is the ambient air flow, and the set area is the ambient flow field.
The diameter of the vortex ring generating cylinder body 101 of the test group is 0.15m, the length of the vortex ring generating cylinder body 101 is 0.2m, and the diameter of the vortex ring outlet 102 is 0.1m; the vortex ring generating cartridge body 101 of the control group was the same as that of the test group. The diameter of the fresh air storage cylinder body 301 of the test group is 0.25m, the length of the fresh air storage cylinder body 301 is 0.2m, and the diameter of the vortex ring fresh air supply opening 303 is 0.25m; the control group had no fresh air storage cartridge body 301.
Placing the physical models of the test group and the control group in a calculation space with the same size, wherein the dimension of the calculation space is 0.5mX0.5mX0.8m; the air supply speed at the first fresh air inlet 104 is 0.01m/s, and the air supply speed at the second fresh air inlet 305 is 0.05m/s; the moving speed of the movable cover 204 in the vortex ring generating chamber 10302 was 1.2m/s, and the moving time was 0.0825s.
As can be seen from fig. 6 and 7, the fresh air component in the vortex ring generated by the vortex ring air supply device with high fresh air quantity is obviously higher than the fresh air component in the vortex ring generated by the traditional vortex ring air supply device, which shows that the vortex ring air supply device with high fresh air quantity stores more fresh air through the fresh air storage cylinder, strengthens the entrainment of the vortex ring on the fresh air in the generation stage, and enables the generated vortex ring to carry more fresh air, thereby realizing the generation of the vortex ring with high fresh air quantity.
Claims (9)
1. The vortex ring air supply device with high fresh air quantity comprises a vortex ring generating cylinder (1), wherein a driving piston (2) is coaxially arranged in the top of the vortex ring generating cylinder (1), and the device is characterized in that a fresh air storage cylinder (3) is coaxially and fixedly arranged outside the bottom of the vortex ring generating cylinder (1);
The vortex ring generating cylinder (1) comprises a vortex ring generating cylinder body (101), and a vortex ring outlet (102) is formed in the bottom end opening of the vortex ring generating cylinder body (101); the space in the vortex ring generating cylinder body (101) is a main cavity (103); the main cavity (103) is divided into an upper half part and a lower half part by the movable cover plate (204) of the driving piston (2), the upper half part of the main cavity (103) is a sealed piston movable cavity (10301), and the lower half part of the main cavity (103) is a vortex ring generating cavity (10302) with an open bottom end;
the vortex ring generating cylinder body (101) is provided with a first new wind inlet hole (104) along the radial direction, the first new wind inlet hole (104) is communicated with the vortex ring generating cavity (10302), and a one-way air inlet valve (105) is arranged at the first new wind inlet hole (104);
The fresh air storage cylinder (3) comprises a fresh air storage cylinder body (301), the top opening of the fresh air storage cylinder body (301) is a vortex ring generation cylinder mounting hole (302), and the bottom opening of the fresh air storage cylinder body (301) is a vortex ring fresh air supply opening (303);
The vortex ring generating cylinder body (101) is arranged in the vortex ring generating cylinder mounting hole (302), the bottom end of the vortex ring generating cylinder body (101) extends into the fresh air storage cylinder body (301), and a space in the fresh air storage cylinder body (301) is a vortex ring fresh air mixing cavity (304);
The fresh air storage cylinder body (301) is positioned at the top end around the vortex ring generation cylinder body (101), a second fresh air inlet hole (305) is axially formed in the top end, and the second fresh air inlet hole (305) is communicated with the vortex ring fresh air mixing cavity (304); the second fresh air inlet hole (305) is positioned below the first fresh air inlet hole (104), and the axial extension line of the second fresh air inlet hole (305) is perpendicular to and intersected with the radial extension line of the first fresh air inlet hole (104);
The first fresh air inlet hole (104) and the second fresh air inlet hole (305) are communicated with the blower.
2. The high-fresh air-volume vortex ring air supply device according to claim 1, wherein the driving piston (2) comprises a fixed cover plate (201), the fixed cover plate (201) is fixedly arranged at the top end of the vortex ring generating cylinder (1), the top end of the vortex ring generating cylinder (1) is completely closed by the fixed cover plate (201), the top end of an air cylinder (202) is fixedly arranged on the lower surface of the fixed cover plate (201), the top end of a piston rod (203) is arranged in the air cylinder (202), a movable cover plate (204) is arranged at the bottom end of the piston rod (203), and the movable cover plate (204) can move in the vortex ring generating cylinder (1) along the axial direction under the driving of the air cylinder (202).
3. The high fresh air volume vortex ring blower of claim 2, wherein a handle (205) is fixedly arranged on the upper surface of the fixed cover plate (201) in the middle.
4. The high-fresh-air-quantity vortex ring air supply device according to claim 1, wherein the inner wall of the vortex ring generating cylinder (1) is fixedly provided with a one-way fan blade plate (4), and the one-way fan blade plate (4) is positioned between the first fresh air inlet hole (104) and the vortex ring outlet (102); the unidirectional fan blade plate (4) divides the vortex ring generating cavity (10302) into an upper half part and a lower half part, the upper half part of the vortex ring generating cavity (10302) is a vortex ring protecting cavity (1030201), and the lower half part of the vortex ring generating cavity (10302) is a vortex ring output cavity (1030202).
5. The high fresh air volume scroll air supply apparatus according to claim 4, wherein said one-way fan blade (4) is located below the scroll generating cylinder mounting hole (302).
6. The high-fresh-air-quantity vortex ring air supply device according to claim 4, wherein a plurality of fan blades (401) are arranged on the unidirectional fan blade plate (4), one side of each fan blade (401) is a movable side, the other side of each fan blade (401) is rotatably arranged on a fan blade shaft (402), and the fan blade shaft (402) is fixedly arranged on the unidirectional fan blade plate (4); the fan blade (401) can be turned downwards along the axial direction around the fan blade shaft (402).
7. The high-fresh air volume vortex ring air supply device according to claim 1, wherein a variable caliber structure (5) is arranged at the vortex ring outlet (102) and the vortex ring fresh air supply opening (303), the variable caliber structure (5) comprises a plurality of variable caliber sheets (501) arranged along the tangential direction, the adjacent variable caliber sheets (501) are mutually overlapped, and the variable caliber sheets (501) form an adjustable opening (502) with adjustable inner diameter; the adjustable ports (502) enable adjustment of the inner diameter by clutching movement of the plurality of variable diameter blades (501).
8. The high fresh air volume vortex ring air supply device according to claim 1, wherein the middle part of the fresh air storage cylinder body (301) is a telescopic cylinder body (306), and the telescopic cylinder body (306) can perform telescopic movement along the axial direction.
9. The high fresh air volume vortex ring air supply device according to claim 8, wherein a first controller, a sensor and a second controller are arranged on the inner wall of the fresh air storage cylinder (3); the telescopic cylinder (306) is connected with the input end and the output end of the first controller, the output end of the first controller is connected with the input end of the sensor, the output end of the sensor is connected with the input end of the second controller, and the output end of the second controller is connected with the variable diameter sheet (501).
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