CN111550418A - Low-noise high-efficiency centrifugal blower - Google Patents
Low-noise high-efficiency centrifugal blower Download PDFInfo
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- CN111550418A CN111550418A CN202010410449.0A CN202010410449A CN111550418A CN 111550418 A CN111550418 A CN 111550418A CN 202010410449 A CN202010410449 A CN 202010410449A CN 111550418 A CN111550418 A CN 111550418A
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- blower
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- silencer
- low
- air inlet
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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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/165—Axial entry and discharge
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4253—Fan casings with axial entry and discharge
-
- 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
-
- 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
- F04D29/664—Sound attenuation by means of sound absorbing material
-
- 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
- F04D29/665—Sound attenuation by means of resonance chambers or interference
-
- 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- 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
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
Abstract
The invention discloses a low-noise high-efficiency centrifugal blower which comprises a blower and a silencer, wherein the blower comprises a blower body and an impeller connected inside the blower body, a motor is mounted at the upper end of the blower body, an air inlet and an air outlet are formed in two sides of the blower body, and the silencer is connected to the air inlet. The invention has the beneficial effects that: 1. through adjusting blade quantity and installation angle, can reduce the fan and produce the noise, improve the efficiency of airing exhaust simultaneously, 2, set up the muffler, can reduce wind gap department and produce the noise, 3, set up rubber shock insulation pad and metal expansion joint, can reduce the noise that the fan vibrations arouse when the operation.
Description
Technical Field
The invention belongs to the field of centrifugal blowers, and particularly relates to a low-noise high-efficiency centrifugal blower.
Background
The fan is used as a typical gas pressurization and conveying machine and is widely applied to industries such as building materials, electric power, smelting, mines, aquaculture, sewage treatment, chemical engineering and the like. The working principle is that two mutually meshed impellers in a casing rotate at a constant speed in opposite directions under the action of a pair of synchronous gears, so that gas in a closed volume (element volume) enclosed by the casing, a wall plate and the impellers is pushed and discharged to an outlet from a gas inlet continuously, and the purpose of blowing is achieved.
The air volume and pressure of the fan have sudden change in each suction and discharge process, so that large noise is generated. According to the forming mechanism of fan noise, the fan noise mainly comprises mechanical noise and pneumatic noise, wherein the pneumatic noise accounts for a great proportion in noise composition, and the pneumatic noise mainly comprises pulsation noise of return gas at an exhaust end. When the fan exhausts, high-pressure gas can flow back when the element volume is opened, and the high-pressure gas flows back into the element volume instantly to cause extremely strong vortex disturbance, so that the flow rate is extremely high, the energy is extremely high, and the noise is extremely strong. The noise is harmful to human body and is not favorable for protecting environment, thereby limiting the application range of the blower.
A low noise, high efficiency centrifugal blower, publication No. CN109312757A, having a housing with spline-shaped walls configured to minimize the average tangential air velocity difference within the scroll of a centrifugal fan circumferentially surrounding the blower, while also minimizing the fan blade deflection angle of the air discharged from the centrifugal fan, improves the efficiency of an HVACR blower by further improving the configuration of the scroll housing of the blower. The high-efficiency low-noise high-pressure fan with the notice number of CN207864204U has the advantages that the grid is arranged to arrange the entering air flow, when the motor starts to work, the output shaft of the motor drives the impeller to rotate at a high speed through the transmission shaft, the impeller sucks air into the fan shell through the air inlet, the grid can arrange the disordered air flow into stable air flow to enter the fan shell, so that the disordered air flow is prevented from impacting the impeller to generate noise, when the fan works, the grid can also filter winged insects and sundries, the winged insects and the sundries are prevented from entering the fan, the fan is effectively protected, compared with the existing high-pressure fan, the novel high-pressure fan can reduce the noise generated during the work, and simultaneously can protect the fan, the safety during the use is improved, and meanwhile, the sundries entering the fan do not need to be cleaned, the use efficiency is indirectly improved. Above-mentioned patent scheme can not reach fine technological effect to the fan noise reduction.
The invention provides a low-noise high-efficiency centrifugal blower, aiming at solving the problem of large noise and low efficiency of the existing blower.
Disclosure of Invention
The invention discloses a low-noise high-efficiency centrifugal blower, which aims to solve the problems of high noise and low efficiency of the blower in the prior art. Through adjusting blade quantity and installation angle, can reduce the fan and produce the noise by oneself, improve the efficiency of airing exhaust simultaneously, set up the muffler, can reduce wind gap department air current wind pressure and produce the noise, set up rubber shock insulation pad and metal expansion joint, can reduce the noise that the fan vibrations arouse when the operation.
The technical scheme for solving the technical problem of the invention is as follows: a low-noise high-efficiency centrifugal blower comprises a blower and a silencer, wherein the blower comprises a blower body and an impeller connected inside the blower body, a motor is mounted at the upper end of the blower body, an air inlet and an air outlet are formed in two sides of the blower body, and the silencer is connected to the air inlet; the impeller comprises a working wheel, blades and a cylindrical shell, the blades are connected to the working wheel, the outer part of the blades is connected with the cylindrical shell, and the design parameters of the blades are as follows: the number of the blades is 6-14, and the installation angle of the blades is 15-35 degrees; the silencer is folded plate formula silencer, the inside packing of folded plate has centrifugal glass cotton, the design parameter of folded plate is: the plate thickness is 100mm-800mm, the folded angle of the folded plate is 95-130 degrees, and the plate spacing is 100mm-160 mm.
Preferably, in the technical scheme disclosed by the invention, a protective cover is arranged on one side of the motor, dust can be generated when the blower works, the dust cover has a dustproof effect, the dust cover is arranged on one side of the motor and can prevent the dust from entering the motor, the work of the motor is influenced by excessive dust in the motor, and the motor is easy to generate noise.
Preferably, in the technical scheme disclosed by the invention, metal expansion joints are arranged at the joints of the air inlet and the air outlet, the metal expansion joints have the effects of corrosion resistance, high temperature resistance and noise and vibration reduction, and meanwhile, the fan structure has good performance and compact structure due to the use of the metal expansion joints.
Preferably, in the technical scheme disclosed by the invention, the air blower and the silencer are arranged on the bottom frame, the rubber shock insulation cushion is arranged at the bottom of the bottom frame, the air blower can vibrate during operation and generate noise due to vibration, and the rubber shock insulation cushion can reduce the noise generated by vibration of the air blower.
Preferably, in the technical scheme disclosed by the invention, the air door control device is arranged at the air inlet, the air door control device can control the air volume at the air inlet, and the air volume can be properly adjusted to avoid the generation of large noise due to airflow disturbance.
Preferably, in the technical scheme disclosed by the invention, the inner wall of the blower body is provided with a sound insulation layer, the impeller in the blower body can generate certain noise when working, and the sound insulation layer is arranged on the inner wall, so that sound absorption and sound insulation can be realized.
The invention has the beneficial effects that: 1. through adjusting blade quantity and installation angle, can reduce the noise that the fan during operation produced by oneself, improve the fan efficiency of airing exhaust simultaneously, 2, set up the muffler in wind gap department, can reduce wind gap department air current atmospheric pressure and produce the noise, 3, set up rubber shock insulation pad and metal expansion joint, can reduce the noise that the fan vibrations arouse when the operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of an impeller;
fig. 3 is a schematic view of the muffler flap.
Wherein, the corresponding relation between the reference signs and the component names is as follows: 1-blower, 2-blower body, 3-impeller, 301-working wheel, 302-blade, 303-cylindrical casing, 4-motor, 5-air inlet, 6-air outlet, 7-silencer, 701-folded plate, 8-protective cover, 9-metal expansion joint, 10-bottom frame, 11-rubber shock insulation pad and 12-air door control device.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The invention discloses a low-noise high-efficiency centrifugal blower which comprises a blower 1 and a silencer 7, wherein the blower 1 comprises a blower body 2 and an impeller 3 connected inside the blower body 2, a motor 4 is mounted at the upper end of the blower body 2, the motor 4 is used for driving the blower 1 to work, an air inlet 5 and an air outlet 6 are arranged at two sides of the blower body, the silencer 7 is connected at the air inlet 5, and the silencer 7 is used for absorbing noise generated when air flow enters the blower.
In this embodiment, the impeller 3 includes a rotor 301, a blade 302 and a cylindrical housing 303, the blade 302 is connected to the rotor 301, the cylindrical housing 303 is connected to the outside, and the design parameters of the blade 302 are as follows: the number of the blades 302 is 6-14, and the installation angle of the blades 302 is 15-35 degrees; the larger the installation inclination angle of the fan blade 302 is, the larger the pressure difference between the upper surface and the lower surface of the blade 302 is, the larger the wind pressure at the same rotating speed is, the larger the generated noise is, the inclination angle of the blade 302 should be lifted within a certain limit, and the number of the blades 302 is 6-14, so that the condition that the distance between the blades 302 is not too large to influence the wind pressure can be ensured.
In this embodiment, the muffler 7 is a folded plate muffler, the inside of the folded plate 701 is filled with centrifugal glass wool, and the design parameters of the folded plate 701 are as follows: the thickness of the folded plate 701 is 100mm-800mm, the folding angle of the folded plate 701 is 95-130 degrees, and the distance between the folded plates 701 is 100mm-160 mm. The thickness of the folded plate 701 is set to be 100mm-800mm, so that centrifugal glass wool can be filled in the folded plate 701, and the folded plate 701 has a noise absorption function; the folding angle of the folding plate 701 is preferably 95-130 degrees, and experiments show that when the folding angle is smaller than 95 degrees, the air duct is small, the transmission of air is not utilized, the efficiency of a fan is influenced, when the folding angle is larger than 130 degrees, the folding plate 701 is too gentle, the air duct is large, the refractive index between noise and the folding plate 701 is low, the noise is not reduced, when the folding angle is 95-130 degrees, the noise can be effectively reduced, meanwhile, the efficiency of the fan is not influenced, and the maximum air flow and the best noise elimination characteristic are achieved.
The working process of the embodiment is as follows: air inlet 5 department air intake, the noise that the wind pressure produced is reflected and is fallen the noise through folded plate 701 of muffler 7, wind gets into air-blower 1 through folded plate 701, discharge from air outlet 5 after impeller 3 compression, wind is when blade 302 through setting up the angle in impeller 3 operates, can the noise hang down, and it is efficient to exhaust, in the fan operation process, can adjust air throttle controlling means 12 regulation amount of wind speed, avoid the indiscriminate noise that produces of air current wadding, base rubber shock insulation pad 11 can further prevent that fan work vibrations from arousing the noise simultaneously.
Preferably, in this embodiment, according to actual needs, the same silencer 7 may be disposed at the air outlet 6 of the re-blower to reduce noise generated at the air outlet 6.
Preferably, in the technical solution disclosed in the present invention, a protective cover 8 is disposed on one side of the motor 4. The during operation of air-blower 1 has the dust, and protection casing 8 has dustproof effect, and 4 one sides of motor set up protection casing 8 and can prevent that the dust from getting into motor 4, and the too much influence of dust is 4 works in the motor 4, makes motor 4 produce the noise easily.
Preferably, in the technical scheme disclosed by the invention, metal expansion joints 9 are arranged at the joints of the air inlet 5 and the air outlet 6. The metal expansion joint 9 has the functions of corrosion resistance, high temperature resistance and noise and vibration reduction, and meanwhile, the fan structure has good performance and compact structure by using the metal expansion joint 9.
Preferably, in the technical scheme disclosed by the invention, the blower 1 and the silencer 7 are mounted on a bottom frame 10, and a rubber vibration isolation cushion 11 is arranged at the bottom of the bottom frame 10. The rubber shock-insulation pad 11 has good shock insulation, buffering and noise reduction capabilities, stable performance, long service life, easy manufacture into a required shape, firm adhesion with metal, large bearing capacity per unit area, larger internal damping action than a steel spring and capability of isolating excitation frequency as low as about 10 Hz. The air blower 1 can vibrate during operation, noise can be generated due to vibration, and the rubber shock insulation cushion 11 is arranged to reduce the noise generated by vibration of the air blower 1.
Preferably, in the technical solution disclosed in the present invention, a damper control device 12 is disposed at the air inlet 5. The air door control device 12 can control the air quantity at the air inlet, and can avoid the generation of loud noise due to the disordered airflow by adjusting the proper air quantity.
Preferably, in the technical solution disclosed in the present invention, a sound insulation layer is provided on an inner wall of the blower body 2. The impeller 3 in the blower body 2 generates certain noise when working, and the sound insulation layer is arranged on the inner wall, so that sound absorption and sound insulation can be realized.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (6)
1. A low-noise high-efficiency centrifugal blower comprises a blower (1) and a silencer (7), and is characterized in that the blower (1) comprises a blower body (2) and an impeller (3) connected to the inside of the blower body (2), a motor (4) is installed at the upper end of the blower body (2), an air inlet (5) and an air outlet (6) are arranged at two sides of the blower body, and the silencer (7) is connected to the air inlet (5); the impeller (3) comprises a working wheel (301), blades (302) and a cylindrical shell (303), wherein the blades (302) are connected to the working wheel (301), the cylindrical shell (303) is connected to the outside, and the design parameters of the blades (302) are as follows: the number of the blades (302) is 6-14, and the installation angle of the blades (302) is 15-35 degrees; the silencer (7) is a folded plate silencer, the inside of the folded plate (701) is filled with centrifugal glass wool, and the design parameters of the folded plate (701) are as follows: the plate thickness is 100mm-800mm, the angle of the folded plate (701) is 95-130 degrees, and the plate spacing is 100mm-160 mm.
2. A low noise, high efficiency centrifugal blower according to claim 1, characterized in that the motor (4) is provided with a protective cover (8) on one side.
3. A low noise, high efficiency centrifugal blower according to claim 1, characterized in that the connection of the air inlet (5) and the air outlet (6) is provided with a metal expansion joint (9).
4. A low-noise high-efficiency centrifugal blower according to claim 1, characterized in that the blower (1) and the silencer (7) are mounted to a bottom frame (10), and the bottom of the bottom frame (10) is provided with rubber vibration-isolating pads (11).
5. A low noise, high efficiency centrifugal blower according to claim 1, characterized in that a damper control device (12) is provided at the air inlet (5).
6. A low-noise high-efficiency centrifugal blower according to claim 1, characterized in that the inner wall of the blower body (2) is provided with a sound-insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410449.0A CN111550418A (en) | 2020-05-15 | 2020-05-15 | Low-noise high-efficiency centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410449.0A CN111550418A (en) | 2020-05-15 | 2020-05-15 | Low-noise high-efficiency centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111550418A true CN111550418A (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010410449.0A Pending CN111550418A (en) | 2020-05-15 | 2020-05-15 | Low-noise high-efficiency centrifugal blower |
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| CN (1) | CN111550418A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006308435A1 (en) * | 2005-10-28 | 2007-05-03 | Resmed Motor Technologies Inc. | Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor |
| DE102005060355A1 (en) * | 2005-12-16 | 2007-06-21 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic appliance with thermoelectric heat pump |
| CN203463293U (en) * | 2013-09-24 | 2014-03-05 | 山东永泰化工有限公司 | Low noise air blower |
| CN203857658U (en) * | 2014-05-16 | 2014-10-01 | 江苏罡阳转向系统有限公司 | Corrugated folded plate muffler |
| CN104564742A (en) * | 2014-12-30 | 2015-04-29 | 上虞市鹏翔暖通设备有限公司 | Centrifugal type axial flow fan |
| CN204511651U (en) * | 2015-01-04 | 2015-07-29 | 中国移动通信集团江苏有限公司 | The sound-deadening and noise-reducing device of heavy duty generator set |
| CN106050289A (en) * | 2016-06-30 | 2016-10-26 | 徐州安普瑞特能源科技有限公司 | Movable mine ventilation device |
| CN206386040U (en) * | 2017-01-09 | 2017-08-08 | 东莞市雅高通风设备制造有限公司 | A kind of modified sound-deadening louver |
| CN207279667U (en) * | 2017-09-29 | 2018-04-27 | 无锡市华通电力设备有限公司 | A kind of boiler of power plant chimney silencer |
| CN208168717U (en) * | 2018-05-14 | 2018-11-30 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of combined louver window |
| CN208817593U (en) * | 2018-09-18 | 2019-05-03 | 上饶市和韦科技有限公司 | A kind of mute Wind-cooling type heat pump air conditioner unit |
-
2020
- 2020-05-15 CN CN202010410449.0A patent/CN111550418A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006308435A1 (en) * | 2005-10-28 | 2007-05-03 | Resmed Motor Technologies Inc. | Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor |
| DE102005060355A1 (en) * | 2005-12-16 | 2007-06-21 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic appliance with thermoelectric heat pump |
| CN203463293U (en) * | 2013-09-24 | 2014-03-05 | 山东永泰化工有限公司 | Low noise air blower |
| CN203857658U (en) * | 2014-05-16 | 2014-10-01 | 江苏罡阳转向系统有限公司 | Corrugated folded plate muffler |
| CN104564742A (en) * | 2014-12-30 | 2015-04-29 | 上虞市鹏翔暖通设备有限公司 | Centrifugal type axial flow fan |
| CN204511651U (en) * | 2015-01-04 | 2015-07-29 | 中国移动通信集团江苏有限公司 | The sound-deadening and noise-reducing device of heavy duty generator set |
| CN106050289A (en) * | 2016-06-30 | 2016-10-26 | 徐州安普瑞特能源科技有限公司 | Movable mine ventilation device |
| CN206386040U (en) * | 2017-01-09 | 2017-08-08 | 东莞市雅高通风设备制造有限公司 | A kind of modified sound-deadening louver |
| CN207279667U (en) * | 2017-09-29 | 2018-04-27 | 无锡市华通电力设备有限公司 | A kind of boiler of power plant chimney silencer |
| CN208168717U (en) * | 2018-05-14 | 2018-11-30 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of combined louver window |
| CN208817593U (en) * | 2018-09-18 | 2019-05-03 | 上饶市和韦科技有限公司 | A kind of mute Wind-cooling type heat pump air conditioner unit |
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Application publication date: 20200818 |
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| RJ01 | Rejection of invention patent application after publication |