CN112963383A - Noise reduction device, high-speed turbofan and breathing machine - Google Patents
Noise reduction device, high-speed turbofan and breathing machine Download PDFInfo
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- CN112963383A CN112963383A CN202110137975.9A CN202110137975A CN112963383A CN 112963383 A CN112963383 A CN 112963383A CN 202110137975 A CN202110137975 A CN 202110137975A CN 112963383 A CN112963383 A CN 112963383A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0057—Pumps therefor
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Abstract
The invention relates to the technical field of auxiliary equipment of a breathing machine, in particular to a noise reduction device, a high-speed turbofan and a breathing machine. The invention provides a noise reduction device, comprising: introducing air into an air inlet of the noise reduction device; the rotary chamber is communicated with the air inlet and is used for carrying out at least one rotary treatment on the air entering from the air inlet; and the air outlet is communicated with the rotary cavity and guides the air subjected to rotary treatment out of the noise reduction device. The embodiment of the invention also provides the high-speed turbofan, the air inlet noise reduction mechanism is arranged at the air inlet end of the high-speed turbofan, the air exhaust noise reduction mechanism is arranged at the air outlet end of the high-speed turbofan, and the air inlet noise and the air exhaust noise of the high-speed turbofan are eliminated or reduced, so that the noise pollution of the high-speed turbofan is reduced, and the use efficiency of the high-speed turbofan is further improved. The invention also provides a breathing machine which comprises the high-speed turbine fan in the technical scheme.
Description
Technical Field
The invention relates to the technical field of auxiliary equipment of a breathing machine, in particular to a noise reduction device, a high-speed turbofan and the breathing machine.
Background
The ventilator is a noise reduction device, a high-speed turbine fan and a ventilator which can replace, control or change the normal physiological respiration of a person, increase the ventilation capacity of the lung, improve the respiratory function, reduce the respiratory consumption and save the heart reserve, and the fan is used as a therapeutic gas source and is a core component in the ventilator. In modern clinical medicine, ventilators have been commonly used for respiratory failure due to various causes, anesthesia respiratory management during major surgery, respiratory support therapy, and emergency resuscitation, and have occupied a very important place in the modern medical field. The vital medical equipment for saving and prolonging the life of a patient is essential to the application of the breathing machine in the treatment application process of the patient, and meanwhile, the treatment of the patient needs to be carried out in a safer environment, so that the breathing machine is relatively silent in application, and a comfortable treatment environment can be brought to the patient.
The turbo fan is an important accessory in the respirator, the turbo fan provides compressed air capable of controlling pressure and flow rate to obtain mixed gas with required oxygen concentration and flow for treatment, the turbo fan comprises a volute and an impeller arranged in the volute, the impeller is driven by a slotless and brushless hollow cup motor with low inertia, high rotating speed and low torque fluctuation, an air inlet is arranged in the center of one side of the volute, a flow channel is arranged along the circumference of the volute, the gas is sucked by an inlet under the action of a high-speed rotating impeller driven by the hollow cup motor, the gas obtains kinetic energy and internal energy through the work of the impeller, is further converted into required high-pressure gas through the flow channel, and finally is connected into equipment through an outlet. In recent years, the breathing machine has been gradually developed and developed, the volume of the breathing machine is smaller, the requirements on the pressure and the flow of the turbo fan are higher, the wind power and the flow of the turbo fan are required to be increased, simultaneously, the noise generated by the turbo fan is increased, and the breathing machine is not suitable for the resting of patients, so that the using efficiency of the breathing machine with the turbo fan is low.
Increase sponge material is usually adopted to fall an uproar to turbofan among the prior art, and large tracts of land parcel fan or paste the internal face in the wind channel, though produced certain noise reduction effect, the peculiar porous structure of sponge material adsorbs the dust easily, breeds the bacterium to the property of long-time back sponge of using can change, elasticity reduces gradually, makes to fall to make an uproar and damping performance descend, still has probably to take place the danger that the sponge powder insufflates the patient air flue even.
Disclosure of Invention
The invention provides a noise reduction device, a high-speed turbofan and a breathing machine aiming at the technical problems in the prior art, and solves the technical problems that the turbofan in the prior art is high in noise and low in noise reduction effect, so that the service efficiency of the turbofan is low.
In order to achieve the above technical object, an aspect of the embodiments of the present invention provides a noise reduction apparatus for performing noise reduction processing on a fan, including: introducing air into an air inlet of the noise reduction device; the rotary chamber is communicated with the air inlet and is used for carrying out at least one rotary treatment on the air entering from the air inlet; and the air outlet is communicated with the rotary cavity and guides the air subjected to rotary treatment out of the noise reduction device.
Preferably, the noise reduction device of the present invention is characterized in that the noise reduction device includes an intake noise reduction mechanism, and the intake noise reduction mechanism includes: the rotary chamber is formed in the sealing box, the air inlet is formed in one side of the sealing box, and one end of the air inlet is communicated with an air inlet pipe; the noise reduction frame is arranged in the rotary cavity, the top of the noise reduction frame is open, the rotary cavity is divided into a first noise reduction chamber and an air inlet chamber, one end, back to the air inlet, of the air inlet pipe extends into the first noise reduction chamber, and the top of the first noise reduction chamber is communicated with the air inlet chamber; and the communicating pipe is communicated with the air inlet chamber, the first end of the communicating pipe is connected with the sealing box, the second end of the communicating pipe extends outwards to form a section, and the air outlet is formed in the second end of the communicating pipe.
Preferably, the noise reduction device is characterized in that a gap is formed between one end, back to the air inlet, of the air inlet pipe and the inner surface of the bottom of the noise reduction frame, and a gap is formed between the noise reduction frame and the inner surface of the bottom of the sealing box.
Preferably, the noise reduction device of the present invention is characterized in that the noise reduction device includes an exhaust noise reduction mechanism, and the exhaust noise reduction mechanism includes: a noise reduction cartridge, the turning chamber being formed within the noise reduction cartridge; the two sealing partition plates are arranged in the noise reduction cylinder and divide the rotary cavity into a second noise reduction chamber, a third noise reduction chamber and a fourth noise reduction chamber; the connecting pipe is connected to the noise reduction cylinder, the air inlet is formed at the first end of the connecting pipe, and the second end of the connecting pipe is communicated with the fourth noise reduction chamber; the noise reduction through pipe is connected to the sealing partition plate and is communicated with the second noise reduction chamber and the fourth noise reduction chamber; and the air outlet pipe is connected to the noise reduction barrel, the air outlet is formed at the first end of the air outlet pipe, and the second end of the air outlet pipe is communicated with the second noise reduction chamber.
Preferably, the noise reduction device is characterized in that a part of the noise reduction through pipe, which is located in the third noise reduction chamber, is provided with a plurality of first air holes, and the first air holes are communicated with the noise reduction through pipe and the third noise reduction chamber; and a plurality of second air holes are formed in the part of the air outlet pipe, which is positioned in the third noise reduction chamber, and the second air holes are communicated with the air outlet pipe and the third noise reduction chamber.
The embodiment of the invention also provides a high-speed turbofan, which is characterized by comprising the noise reduction device in the technical scheme, wherein an air outlet of the noise reduction device is connected with an air inlet end of the high-speed turbofan.
In another aspect of the embodiment of the present invention, a high-speed turbofan is further provided, which is characterized in that the noise reduction device in the above technical scheme is included, and an air inlet of the noise reduction device is connected to an air outlet end of the high-speed turbofan.
Yet another aspect of an embodiment of the present invention provides a high-speed turbofan, including: the noise reduction device according to any one of the above technical solutions; the fan shell is characterized in that a plurality of guide grooves are formed in the inner side wall of the fan shell, the cross sections of the guide grooves are arc-shaped, and a vacuum cavity is formed in the fan shell; the impeller is arranged in the fan shell; and the output end of the driving motor is connected with an impeller shaft of the impeller and is used for driving the impeller to rotate around the central axis of the impeller shaft.
In another aspect, the embodiment of the present invention further provides a ventilator, which is characterized by including the high-speed turbine fan in any one of the above technical solutions.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
1. when the noise reduction device works, the air inlet sucks external air into the air inlet pipe, and the air entering the air inlet pipe is processed by the first noise reduction chamber, airflow entering the air inlet pipe is rectified and then flows into the air inlet chamber, so that the flow noise of the air entering the air inlet pipe can be further eliminated, the processed air enters the communicating pipe through the air inlet chamber, then enters the air inlet end of the high-speed turbine fan through the communicating pipe, then enters the high-speed turbine fan, the flow noise of the air entering the air inlet end of the high-speed turbine fan is eliminated and optimized, the airflow noise of the air entering the air inlet end of the high-speed turbine fan is further reduced, and the air inlet noise pollution of the high-speed turbine fan is reduced.
2. In the embodiment of the invention, the air exhausted by the high-speed turbofan enters a fourth noise reduction chamber through an air outlet and a connecting pipe at one end of an air exhaust noise reduction mechanism, the flowing air is rectified by the fourth noise reduction chamber, so that the flowing air is exhausted into a second noise reduction chamber and a third noise reduction chamber through a noise reduction through pipe and a plurality of first air holes on the surface of the noise reduction through the second noise reduction chamber and the third noise reduction chamber, the flowing noise of the exhausted air can be effectively reduced, then the air subjected to noise reduction in the second noise reduction chamber and the third noise reduction chamber is exhausted into an air outlet pipe through an air outlet pipe and second air holes on the surface of the air outlet pipe, the air is exhausted through the first end of the air outlet pipe, namely an air outlet, the breathing equipment is convenient to use, the flowing noise of the air exhausted by the high-speed turbofan is eliminated and optimized through the second noise reduction chamber, the third noise reduction chamber and the fourth noise reduction chamber, and, further reducing the noise pollution of the breathing apparatus.
3. In the embodiment of the invention, when the high-speed turbofan works, the fan shell with the vacuum cavity can effectively reduce the noise source generated when the impeller works, and the air inlet efficiency and the air exhaust efficiency of the turbofan can be effectively improved by matching with the design of the guide groove.
Drawings
FIG. 1 is a cross-sectional view of a high speed turbofan in an embodiment of the invention;
FIG. 2 is a schematic view of the connection of the noise reducing device to the high-speed turbine fan according to the first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an intake air noise reduction mechanism according to a first embodiment of the present invention;
FIG. 4 is a schematic view of a noise reducer in a second embodiment of the present invention connected to a high-speed turbine fan;
FIG. 5 is a schematic structural diagram of an exhaust noise reduction mechanism according to a second embodiment of the present invention;
FIG. 6 is a schematic view of the connection of a noise reducer to a high-speed turbine fan according to a third embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a ventilator according to a fourth embodiment of the present invention;
FIG. 8 is a schematic view of an installation structure of a high-speed turbofan according to an embodiment of the invention;
fig. 9 is a schematic view of an installation structure of an impeller in a fourth embodiment of the present invention.
Description of the reference numerals
100-high-speed turbine fan, 110-fan shell, 111-guide groove, 112-vacuum cavity, 113-induced air cavity; 120-an impeller; 130-an air outlet;
200-noise reduction device, 210-air inlet noise reduction mechanism, 211-sealing box, 212-air inlet, 213-air inlet pipe, 214-noise reduction frame, 2141-bottom wall, 2142-side wall, 215-first noise reduction chamber, 216-air inlet chamber, 217-communicating pipe, 218-air outlet, 219-connecting seat;
300-a noise reduction device, 320-an exhaust noise reduction mechanism, 321-a noise reduction barrel, 322-a sealing clapboard, 323-a second noise reduction chamber, 324-a third noise reduction chamber, 325-a fourth noise reduction chamber, 326-a connecting pipe, 3261-an air inlet, 327-an air outlet pipe, 3271-a second air hole, 3272-an air outlet, 328-a noise reduction through pipe and 3281-a first air hole; 329-an exhaust pipe;
400-noise reduction device, 410-air inlet noise reduction mechanism, 412-air inlet, 417-communicating pipe, 420-air exhaust noise reduction mechanism and 429-exhaust pipe;
500-respirator, 510-body, 520-air outlet.
Detailed Description
Other objects and advantages of the present invention will become apparent by the following explanation of preferred embodiments of the present invention.
For convenience of description, the terms "upper", "lower", "left" and "right" are used in the same direction as the upper, lower, left and right directions of the drawings, but do not limit the structure of the present invention.
[ EXAMPLES one ]
Fig. 1 shows a schematic structural diagram of a high-speed turbofan 100 according to the present invention.
As shown in fig. 1, a high-speed turbo fan 100 according to the present invention includes a fan case 110, an impeller 120, and a driving motor. Wherein the impeller 120 has an impeller shaft and a plurality of blades uniformly connected to the outer circumference of the impeller shaft. The driving motor may be a low-inertia, slotless, brushless coreless motor, and an output end of the driving motor is connected to the impeller shaft of the impeller 120 for driving the blades of the impeller 120 to rotate around a central axis of the impeller shaft. In this embodiment, the output end of the driving motor penetrates through the fan casing 110 and is connected with the impeller shaft of the impeller 120, and a sealing bearing is arranged at the joint of the impeller 120 and the fan casing 110, so that the impeller 120 can rotate and the normal operation inside the fan casing 110 can be ensured. The fan casing 110 has an air inlet end, an air inducing cavity 113 and an air outlet end, and the impeller 120 is disposed in the air inducing cavity 113. The shape of the fan case 110 may be a volute type in the prior art, but is not limited thereto. The air outlet end of the fan casing 110 is provided with an air outlet 130. The driving motor drives the impeller 120 to rotate at a high speed, the air is further introduced into the induced draft chamber 113 from the air inlet end of the fan casing 110 under the rotation action of the impeller 120, kinetic energy and internal energy are obtained by the work of the impeller 120, and are further converted into required high-pressure air through the induced draft chamber 113, and finally the required high-pressure air is connected into the equipment from the air outlet end, namely the air outlet 130, on the fan casing 110 for use.
As shown in fig. 1, a plurality of guide grooves 111 are formed on an inner surface of a sidewall of the fan casing 110, the guide grooves 111 are adapted to the shape of the fan casing 110, and an extending direction of the guide grooves is the same as an extending direction of the fan casing 110. The cross section of the guide groove 111 is of an arc-shaped structure, so that the air sucked by the air inlet end can be guided, and the wind resistance can be reduced to a certain extent by the design of the arc-shaped structure. When the high-speed turbofan 100 works, the driving motor drives the impeller 120 to rotate, centrifugal force is generated, and then wind power sucked by the air inlet end of the fan casing 110 is thrown out to the inner side wall of the fan casing 110, and the thrown gas flows along the guide groove 111 in a guiding manner, so that the gas can uniformly flow in the guide groove 111, the loss is reduced, the intersection influence of air inlet and exhaust is avoided, and the air inlet efficiency is ensured. The vacuum cavity 112 is arranged inside the fan casing 110, that is, the fan casing 110 is partially or completely arranged into a two-layer structure, and the vacuum cavity 112 is formed between the two-layer structure. The fan casing 110 is designed to have a structure with a built-in vacuum cavity 112, so that when the impeller 120 works, noise pollution generated when the impeller 120 rotates can be effectively reduced by using the fan casing 110, and compared with a traditional sound insulation type fan casing such as a fan casing provided with sound insulation cotton, the fan casing 110 provided by the embodiment has a simple structure and a better sound insulation effect.
As shown in fig. 2, in order to solve the problem of noise generated during the operation of the high-speed turbofan 100 in the prior art, the high-speed turbofan 100 provided by the invention further includes a noise reduction device 200. The noise reducer 200 includes an inlet vent 212, a turn chamber, and an outlet vent 218, wherein the inlet vent 212 is configured to direct air into the noise reducer 200; the rotary chamber is communicated with the air inlet 212 and is used for carrying out at least one rotary treatment on the air entering from the air inlet 212; the air outlet 218 is in communication with the turn chamber for directing the air that has been subjected to the turn process out of the noise reducer 200.
Specifically, as shown in fig. 3, the noise reducer 200 in this embodiment includes an intake noise reducing mechanism 210, where the intake noise reducing mechanism 210 is installed at an intake end of the high-speed turbofan 100 to reduce noise at the intake end of the high-speed turbofan 100. The air intake noise reduction mechanism 210 comprises a sealed box 211, a noise reduction frame 214 and a communicating pipe 217, wherein a rotary chamber is formed in the sealed box 211, and an air inlet 212 is formed at the top of the sealed box 211; the sealing case 211 is formed in a box structure with an open top. The sealing case 211 may have a substantially hollow rectangular parallelepiped structure, but is not limited thereto, and may have a cylindrical structure, for example. The present embodiment will be described by taking as an example a case where the sealing case 211 has a substantially rectangular parallelepiped structure. The two opposite side surfaces of the sealing box 211 are oppositely bent to form inclined surfaces, so that the size of the top opening of the sealing box 211 is slightly smaller than that of the inner space, the drift diameter of the air flowing through the air inlet 212 is relatively increased, the air flows in a diffusion mode, and the noise caused by the air is further reduced. The noise reduction frame 214 is arranged in the rotary chamber, the top of the noise reduction frame 214 is open, the rotary chamber is divided into a first noise reduction chamber 215 and an air inlet chamber 216, one end, back to the air inlet 212, of the air inlet pipe 213 extends into the first noise reduction chamber 215, and the top of the first noise reduction chamber 215 is communicated with the air inlet chamber 216. The noise reduction frame 214 includes a bottom wall 2141 formed at the bottom and a side wall 2142 connected to the periphery of the bottom wall 2141, and forms a box-shaped structure with a rectangular cross section, and the size of the box-shaped structure is smaller than the inner size of the sealing box 211. Soundproof cotton may be laid on the upper surface of the bottom wall 2141 of the noise reduction frame 214 to prevent the wind entering from the wind inlet 212 from impacting the bottom wall 2141 to generate noise. The first noise reduction chamber 215 is formed in the inner space of the noise reduction frame 214; one end of the air inlet 212 is communicated with an air inlet pipe 213, the air inlet pipe 213 may include a plurality of air inlet pipes, so as to divide the top opening of the sealed box 211 into a plurality of air inlet openings 212, and the plurality of air inlet pipes 213 are arranged in parallel and perpendicular to the bottom surface of the sealed box 211. One end of the air inlet pipe 213 facing away from the air inlet 212 extends into the first noise reduction chamber 215, and the air introduced from the air inlet 212 can directly enter the first noise reduction chamber 215 through the air inlet pipe 213. The air intake chamber 216 is formed in the sealed case 211 at a position outside the noise reduction frame 214 except for the noise reduction frame 214, and the upper end of the first noise reduction chamber 215 communicates with the air intake chamber 216. After entering the first noise reduction chamber 215, the air passing through the air inlet duct 213 travels upward to the air inlet chamber 216. The communicating pipe 217 is communicated with the air inlet chamber 216, a first end of the communicating pipe 217 is connected with the sealing box 211, a second end of the communicating pipe 217 extends outwards for one section, and the air outlet 218 is formed at the second end of the communicating pipe 217. The communication pipe 217 is a substantially hollow cylindrical structure with two ends penetrating, and a central axis of the cylindrical structure is perpendicular to the bottom surface of the sealing box 211; a first end of the communication pipe 217 penetrates the sealing box 211 to communicate with the air inlet chamber 216, and a second end of the communication pipe 217, i.e., the air outlet 218, communicates with an air inlet end of the fan casing 110. The wind which goes upward through the first noise reduction chamber 215 to the air inlet chamber 216 continues to go downward until flowing out of the air outlet 218 of the communicating pipe 217. The air inlet noise reduction mechanism 210 is used for eliminating and optimizing air inlet noise of the high-speed turbofan 100, and the specific principle is that when the high-speed turbofan 100 works, outside air is sucked into the air inlet pipe 213 through the air inlet 212, and the air entering the air inlet pipe 213 is firstly processed by the first noise reduction chamber 215, and flows into the air inlet chamber 216 after air flow entering the air inlet pipe 213 is rectified, so that the flow noise of the air entering the air from the air inlet pipe 213 can be further eliminated, the processed air enters the communicating pipe 217 through the air inlet chamber 216, then enters the air inlet end of the high-speed turbofan 100 through the communicating pipe 217, and then enters the high-speed turbofan 100, because the air flow at the air inlet end is large when the high-speed turbofan 100 works at a high speed, so that the generated noise is strong, the air flow noise reduction mechanism 210 can effectively eliminate the air flow noise at the air inlet end of the turbofan, thereby further solving the noise pollution when the turbine fan works.
Further, as shown in fig. 3, a gap exists between one end of the air inlet pipe 213 facing away from the air inlet 212 and the inner surface of the bottom of the noise reduction frame 214, and a gap exists between the bottom surface of the noise reduction frame 214 and the inner surface of the bottom of the sealed box 211. Specifically, a gap exists between one end of the air inlet pipe 213 extending into the first noise reduction chamber 215 and the upper surface of the bottom wall 2141 of the noise reduction frame 214, so as to provide a ventilation channel for air, and further reduce noise generation by setting the size of the gap. The outer surfaces of the two opposite side walls 2142 of the noise reduction frame 214 are connected with the connection seats 219, the connection seats 219 are connected with the inner side wall 2142 of the sealing box 211, so that the noise reduction frame 214 is fixed inside the sealing box 211 in a suspended manner through the connection seats 219, the first end of the communication pipe 217 is exposed to the air inlet chamber 216, and the wind energy in the air inlet chamber 216 can smoothly enter the communication pipe 217 to enter the high-speed turbofan 100 from the air outlet 218.
The working principle of one embodiment of the invention is as follows: when the noise reduction device 200 works, the air inlet noise reduction mechanism 210 can be used for eliminating and optimizing air flow noise entering from the air inlet end of the high-speed turbofan 100, so that the air flow noise of the air inlet end of the high-speed turbofan 100 is further reduced, and the air inlet noise pollution of the high-speed turbofan 100 is reduced; when the high-speed turbofan 100 works, the fan shell 110 with the vacuum cavity 112 can effectively reduce noise sources generated when the impeller 120 works, and the design of the guide groove 111 is matched to effectively improve the air intake and exhaust efficiency of the high-speed turbofan 100, and the air intake noise reduction mechanism 210 is arranged at the air intake end of the high-speed turbofan 100, so that the air flow noise generated when the high-speed turbofan 100 intakes air can be effectively solved, the fan shell 110 is further optimized, the noise pollution generated when the impeller 120 rotates is also effectively solved, and the silence of the breathing equipment during working can be further improved.
[ example two ]
As shown in fig. 4 and 5, the difference between the first embodiment and the second embodiment is that the second embodiment has a different noise reduction device 300. Therefore, the following description focuses on the noise reduction device 300 in the present embodiment. Descriptions of the same or similar elements as in the first embodiment will be omitted.
The noise reducer 300 comprises an air inlet 3261, a rotary chamber and an air outlet 3272, wherein the air inlet 3261 is used for guiding air into the noise reducer 300; the rotary chamber is communicated with the air inlet 3261 and is used for carrying out at least one rotary treatment on air entering from the air inlet 3261; the air outlet 3272 is communicated with the rotary chamber and is used for guiding the air subjected to rotary processing out of the noise reduction device 300.
Specifically, as shown in fig. 5, the noise reduction device 300 in the present embodiment includes an exhaust noise reduction mechanism 320, where the exhaust noise reduction mechanism 320 is installed at the air outlet end of the high-speed turbo fan 100 and is used for reducing noise at the air outlet 130 of the high-speed turbo fan 100.
The exhaust noise reduction mechanism 320 comprises a noise reduction cylinder 321, two sealing partition plates 322, a connecting pipe 326, a noise reduction through pipe 328 and an air outlet pipe 327, wherein a rotary cavity is formed in the noise reduction cylinder 321; two sealing partition plates 322 are arranged in the noise reduction cylinder 321, and divide the space of the rotary chamber into a second noise reduction chamber 323, a third noise reduction chamber 324 and a fourth noise reduction chamber 325; the connecting pipe 326 is connected to the noise reduction cylinder 321, the air inlet 3261 is formed at a first end of the connecting pipe 326, and a second end of the connecting pipe 326 is communicated with the fourth noise reduction chamber 325; the noise reduction through pipe 328 is connected to the sealing partition plate 322, and the noise reduction through pipe 328 is communicated with the second noise reduction chamber 323 and the fourth noise reduction chamber 325; and the air outlet pipe 327 is connected to the noise reduction cylinder 321, the air outlet 3272 is formed at a first end of the air outlet pipe 327, and a second end of the air outlet pipe 327 is communicated with the second noise reduction chamber 323. The noise reduction cylinder 321 may be a hollow cylindrical structure, but is not limited thereto. The noise reduction cylinder 321 is installed at one end of the air outlet 130. Two sealed baffles 322 are connected with the inside wall of a section of thick bamboo 321 of making an uproar, and its junction can be provided with the sealing rubber strip to increase the leakproofness, avoid the wind. The connecting tube 326 is a hollow cylinder with two ends penetrating. The first end of the connecting pipe 326 is connected to the noise reducing cylinder 321, and extends out to communicate with the exhaust outlet 130 of the high-speed turbo fan 100 through one end of the noise reducing cylinder 321, and the second end thereof sequentially passes through the two sealing partitions 322 and extends into the fourth noise reducing chamber 325. The gas introduced through the first end of the connection pipe 326, i.e., the inlet port 3261, enters the fourth noise reduction chamber 325 through the connection pipe 326. The noise reduction through pipe 328 is a hollow cylinder with two through ends. A first end of the noise reduction duct 328 is connected to one of the two sealed bulkheads 322 and extends through the sealed bulkhead 322 to the interior of the second noise reduction chamber 323, and a second end of the noise reduction duct 328 is connected to the other of the two sealed bulkheads 322 and extends through the sealed bulkhead 322 to the interior of the fourth noise reduction chamber 325. The gas entering the fourth noise reduction chamber 325 through the connection pipe 326 enters the second noise reduction chamber 323 through the noise reduction through pipe 328. The air outlet pipe 327 is a hollow cylinder with two through ends. The first end of the air outlet pipe 327 is connected with the noise reducing cylinder 321, and extends outwards to a section through the other end of the noise reducing cylinder 321, and the second end of the air outlet pipe 327 sequentially passes through the two sealing partition plates 322 and extends to the inside of the second noise reducing chamber 323. The air entering the second noise reduction chamber 323 through the noise reduction through pipe 328 is exhausted through the air outlet pipe 327 and the air outlet port 3272. The connecting pipe 326, the air outlet pipe 327 and the noise reduction through pipe 328 are arranged in parallel, and the central axes of the connecting pipe 326, the air outlet pipe 327 and the noise reduction through pipe 328 are parallel to the central axis of the noise reduction cylinder 321. The joints of the connecting pipe 326, the air outlet pipe 327, the noise reduction through pipe 328, the noise reduction barrel 321 and the sealing partition plate 322 can be sealed, and specifically, sealant can be filled in the joints to prevent wind from spreading and affecting the guiding of wind.
Further, as shown in fig. 5, a plurality of first air holes 3281 are opened on a portion of the noise reduction through pipe 328 located in the third noise reduction chamber 324, and the first air holes 3281 communicate the noise reduction through pipe 328 and the third noise reduction chamber 324; the part of the air outlet pipe 327 located in the third noise reduction chamber 324 is provided with a plurality of second air holes 3271, and the second air holes 3271 communicate the air outlet pipe 327 and the third noise reduction chamber 324. First wind hole 3281 runs through the outer surface of noise reduction through pipe 328, and second wind hole 3271 runs through the outer surface of air outlet pipe 327, and first wind hole 3281 and second wind hole 3271 evenly distributed make third noise reduction chamber 324 and air outlet pipe 327, noise reduction through pipe 328 be linked together through the setting of first wind hole 3281 and second wind hole 3271.
Further, as shown in fig. 4, an exhaust duct 329 is connected to the exhaust outlet 130 of the high-speed turbo fan 100, a flow channel is disposed inside the exhaust duct 329, the flow channel is substantially L-shaped, the flow channel has an air inlet end and an air outlet end, the air inlet end is communicated with the exhaust outlet 130 of the high-speed turbo fan 100, and the air outlet end is communicated with a first end of the connecting pipe 326, namely, the air inlet 3261, so that the central axis of the noise reduction cylinder 321 is perpendicular. It should be noted that the shape of the internal flow channel of the exhaust duct 329 may also be designed according to specific installation requirements, for example, the shape is designed to be a straight line, and the application is not limited in particular.
The specific principle of using the exhaust noise reduction mechanism 320 to effectively reduce the flowing noise of the air discharged from the high-speed turbofan 100 is that, when in use, the air discharged from the high-speed turbofan 100 enters the fourth noise reduction chamber 325 through the exhaust outlet 130 via the connection pipe 326 at one end of the exhaust noise reduction mechanism 320, and is rectified by the fourth noise reduction chamber 325, so that the air is discharged into the second noise reduction chamber 323 and the third noise reduction chamber 324 via the noise reduction through pipe 328 and the first air holes 3281 on the surface thereof, and the flowing noise of the discharged air can be effectively reduced by the action of the second noise reduction chamber 323 and the third noise reduction chamber 324, and then the air subjected to noise reduction in the second noise reduction chamber 323 and the third noise reduction chamber 324 is discharged into the air outlet pipe 327 via the air outlet pipe 327 and the second air holes 3271 on the surface thereof, and is discharged via the first end of the air outlet pipe 327, i.e. the air outlet 3272, which is convenient for the use of the breathing apparatus The third noise reduction chamber 324 and the fourth noise reduction chamber 325 are used for eliminating and optimizing the flowing noise of the gas exhausted by the high-speed turbofan 100, so that the noise of the exhaust of the high-speed turbofan 100 can be further reduced, and the noise pollution of the breathing equipment is further reduced.
The working principle of one embodiment of the invention is as follows: when the noise reduction device 300 works, the exhaust noise reduction mechanism 320 can be utilized to effectively eliminate and reduce the noise of the gas flow discharged by the high-speed turbine fan 100, and further the noise pollution of the gas discharged by the high-speed turbine fan 100 is solved; when the high-speed turbofan 100 works, the fan shell 110 with the vacuum cavity 112 can effectively reduce noise sources generated when the impeller 120 works, and the design of the guide groove 111 is matched to effectively improve the air intake and exhaust efficiency of the turbofan, and the exhaust noise reduction mechanism 320 is arranged at the exhaust end of the high-speed turbofan 100, so that the gas flow noise generated when the high-speed turbofan 100 exhausts air can be effectively solved, the fan shell 110 is further optimized, the noise pollution generated when the impeller 120 rotates is also effectively solved, and the silence of the breathing equipment during working can be further improved.
[ EXAMPLE III ]
As shown in fig. 6, the difference between the first embodiment and the second embodiment is that the present embodiment has a different noise reduction device 400. Therefore, the following description focuses on the noise reduction device 400 in the present embodiment. Descriptions of the same or similar elements as in the first embodiment will be omitted.
The noise reduction device 400 in this embodiment includes both an intake noise reduction mechanism 410 and an exhaust noise reduction mechanism 420. The specific structure and noise reduction principle of the intake air noise reduction mechanism 410 are the same as those of the intake air noise reduction mechanism 410 in the first embodiment, and the specific structure and noise reduction principle of the exhaust air noise reduction mechanism 420 are the same as those of the exhaust air noise reduction mechanism 420 in the second embodiment, and are not described herein again. The air inlet noise reduction mechanism 410 is arranged at an air inlet end of the high-speed turbofan 100, and specifically, a second end of a communicating pipe 417 in the air inlet noise reduction mechanism 410 is communicated with the air inlet end; the exhaust noise reduction mechanism 420 is disposed at the exhaust end of the high-speed turbofan 100, and specifically, a first end of a connection pipe in the exhaust noise reduction mechanism 420 is communicated with the air outlet end of the exhaust pipe 429.
The working principle of one embodiment of the invention is as follows: when the noise reduction device 400 works, the air inlet noise reduction mechanism 410 can be used for eliminating and optimizing air flow noise entering from the air inlet end of the high-speed turbofan 100, so that the air flow noise at the air inlet end of the high-speed turbofan 100 is further reduced, and the air inlet noise pollution of the high-speed turbofan 100 is reduced; when the high-speed turbine fan 100 works, the fan shell 110 with the vacuum cavity 112 can effectively reduce the noise source generated when the impeller 120 works, and the design of the guide slot 111 is matched, the air intake and exhaust efficiency of the high-speed turbofan 100 can be effectively improved, in addition, the air exhaust noise reduction mechanism 420 can effectively eliminate and reduce the noise of the gas flow discharged by the high-speed turbofan 100, the noise pollution of the gas discharged by the high-speed turbofan 100 is further solved, the air intake noise reduction mechanism 410 and the air exhaust noise reduction mechanism 420 are respectively arranged at the air intake end and the air exhaust end of the high-speed turbofan 100, thereby effectively solving the air flow noise when the high-speed turbo fan 100 enters and exhausts air, moreover, the fan shell 110 is further optimized, and noise pollution generated when the impeller 120 rotates is effectively solved, so that the working silence of the breathing equipment can be further improved. The invention synchronously eliminates or reduces the noise of the air inlet noise and the air exhaust noise of the high-speed turbine fan 100 and the noise generated when the impeller 120 rotates, thereby reducing the noise pollution of the high-speed turbine fan 100 during working.
[ EXAMPLE IV ]
The invention also provides a ventilator 500, wherein the ventilator 500 comprises the high-speed turbofan 100 in any one of the above technical solutions, and the ventilator 500 has all the beneficial effects of the high-speed turbofan 100. In this embodiment, the ventilator 500 may only include the high-speed turbofan 100 having the intake air noise reduction mechanism in the first embodiment, may also include the high-speed turbofan 100 having the exhaust air noise reduction mechanism in the second embodiment, and may also include the high-speed turbofan 100 having the intake air noise reduction mechanism and the exhaust air noise reduction mechanism in the third embodiment. In the present embodiment, a high-speed turbofan 100 including an intake noise reduction mechanism and an exhaust noise reduction mechanism in the third embodiment is taken as an example for description.
As shown in fig. 7-9, the ventilator 500 further includes a body 510, and the high-speed turbofan 100 is disposed within the body 510. An air outlet 520 is installed on one side edge of the upper surface of the machine body 510, one end of the air outlet 520 is communicated with an air outlet of the air exhaust noise reduction mechanism 420, and the other end of the air outlet 520 can be connected with a hose to be connected with breathing equipment, so that the requirements of patients are met.
The air inlet 412 of the air inlet noise reduction mechanism 410 is disposed on a side surface of the machine body 510, and the air inlet noise reduction mechanism 410 is fixed to an inner side wall of the machine body 510 by bolts.
The fan housing 110 is longitudinally installed in the body 510 such that the exhaust outlet 130 of the high-speed turbo fan 100 is vertically disposed downward, the exhaust duct 429 is installed at the exhaust outlet 130, and the rotation plane of the impeller 120 is perpendicular to the horizontal plane.
The noise reducer, high speed turbine and ventilator of the present invention have been described in detail with reference to the preferred embodiments thereof, however, it is to be understood that modifications, adaptations and variations can be made by those skilled in the art without departing from the spirit of the present invention. The invention includes the specific embodiments described above and any equivalents thereof.
Claims (10)
1. The utility model provides a device of making an uproar falls for fall the noise processing to the fan, its characterized in that includes:
introducing air into an air inlet of the noise reduction device;
the rotary chamber is communicated with the air inlet and is used for carrying out at least one rotary treatment on the air entering from the air inlet; and
and the air outlet is communicated with the rotary cavity and guides the air subjected to rotary treatment out of the noise reduction device.
2. The noise reducer of claim 1, wherein the noise reducer comprises an intake air noise reduction mechanism, the intake air noise reduction mechanism comprising:
the rotary chamber is formed in the sealing box, the air inlet is formed in one side of the sealing box, and one end of the air inlet is communicated with an air inlet pipe;
the noise reduction frame is arranged in the rotary cavity, the top of the noise reduction frame is open, the rotary cavity is divided into a first noise reduction chamber and an air inlet chamber, one end, back to the air inlet, of the air inlet pipe extends into the first noise reduction chamber, and the top of the first noise reduction chamber is communicated with the air inlet chamber; and
the first end of the communicating pipe is connected with the sealing box, the second end of the communicating pipe extends outwards to form a section, and the air outlet is formed in the second end of the communicating pipe.
3. The noise reducer according to claim 2, wherein a gap exists between an end of the air inlet pipe facing away from the air inlet and a bottom inner surface of the noise reduction frame, and a gap exists between the noise reduction frame and the bottom inner surface of the sealed box.
4. The noise reducer of claim 1, wherein the noise reducer comprises an exhaust noise reduction mechanism, the exhaust noise reduction mechanism comprising:
a noise reduction cartridge, the turning chamber being formed within the noise reduction cartridge;
the two sealing partition plates are arranged in the noise reduction cylinder and divide the rotary cavity into a second noise reduction chamber, a third noise reduction chamber and a fourth noise reduction chamber;
the connecting pipe is connected to the noise reduction cylinder, the air inlet is formed at the first end of the connecting pipe, and the second end of the connecting pipe is communicated with the fourth noise reduction chamber;
the noise reduction through pipe is connected to the sealing partition plate and is communicated with the second noise reduction chamber and the fourth noise reduction chamber; and
connect in fall the play tuber pipe on the section of thick bamboo of making an uproar, the air outlet form in the first end of air-out pipe, the second end intercommunication of air-out pipe fall the room of making an uproar in the second.
5. The noise reducer according to claim 4, wherein a plurality of first air holes are formed in a portion of the noise reduction through pipe located in the third noise reduction chamber, and the first air holes communicate the noise reduction through pipe with the third noise reduction chamber; and a plurality of second air holes are formed in the part of the air outlet pipe, which is positioned in the third noise reduction chamber, and the second air holes are communicated with the air outlet pipe and the third noise reduction chamber.
6. A high-speed turbo fan, comprising the noise reduction device of any one of claims 1 to 3, wherein the air outlet of the noise reduction device is connected to the air inlet end of the high-speed turbo fan.
7. A high-speed turbofan, comprising the noise reducer of any of claims 4 or 5, wherein the inlet of the noise reducer is connected to the outlet of the high-speed turbofan.
8. A high-speed turbofan comprising a noise reducer according to any one of claims 1 to 5.
9. A high-speed turbofan, comprising:
the noise reduction device of any one of claims 1-5;
the fan shell is characterized in that a plurality of guide grooves are formed in the inner side wall of the fan shell, the cross sections of the guide grooves are arc-shaped, and a vacuum cavity is formed in the fan shell;
the impeller is arranged in the fan shell; and
and the output end of the driving motor is connected with an impeller shaft of the impeller and is used for driving the impeller to rotate around the central axis of the impeller shaft.
10. A ventilator comprising a high speed turbofan according to any one of claims 6 to 9.
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| CN202110137975.9A CN112963383B (en) | 2021-02-01 | 2021-02-01 | Noise reduction device, high-speed turbofan and breathing machine |
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| CN112963383B (en) | 2023-01-06 |
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