CN103104516A - Negative-pressure fan - Google Patents
Negative-pressure fan Download PDFInfo
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- CN103104516A CN103104516A CN2012105363816A CN201210536381A CN103104516A CN 103104516 A CN103104516 A CN 103104516A CN 2012105363816 A CN2012105363816 A CN 2012105363816A CN 201210536381 A CN201210536381 A CN 201210536381A CN 103104516 A CN103104516 A CN 103104516A
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- pressure air
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- air fan
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Abstract
The invention provides a negative-pressure fan. The negative-pressure fan comprises an outer shell, a motor, fan blades and a transmission shaft, wherein the motor and the fan blades are respectively arranged in an air inlet and an air outlet at two ends of the outer shell and are connected through the transmission shaft. The fan blades are driven to rotate by the motor through the transmission shaft, and an effect of negative-pressure air exchange is achieved. A box fan is arranged at the position of the air inlet of the outer shell. When the fan works, the box fan rotates along with the fan, therefore, the speed and the intensity of air currents exhausted from a chamber by the negative-pressure fan are relieved, and working noise of the fan blades is reduced. Indoor air flow is enabled to be gentle, wind cutting resistance of the fan blades is reduced, and the service life of the fan blades is prolonged.
Description
Technical field
The present invention relates to a kind of negative-pressure air fan, relate in particular to the negative-pressure air fan that a kind of intake grill place is provided with rotary blade fan.
Background technique
Negative-pressure air fan is the principle of utilizing cross-ventilation, negative pressure ventilation, by the subtend of infield---gate or window nature inhale fresh air, simultaneously indoor sultry gas is forced rapidly to discharge outdoor, to reach a kind of machine of cooling and cooling-down effect.Because of it has cost of investment low (disposable input only is the sixth of air-conditioning), air quantity large (ventilation rate can reach 99%), noise is low, power consumption is little (operating cost only for air-conditioning 1/10th), operate steadily, the life-span is long, the efficient high, therefore now utilized by increasing industrial and mineral factory building, it is also the excellent selection that modernization workshop cooling is ventilated.Especially safe, environmental protection, energy-conservation negative-pressure air fan will become the main flow of aeration-cooling equipment Market.
For a long time, negative-pressure air fan is due to its power large (generally all more than 1KW), so the hot-tempered cent shellfish that produces in the course of the work is usually also larger, therefore, the hot-tempered sound of work that reduces negative-pressure air fan just becomes an important topic of environmental protection aspect.
Usually source and the reason of the noise producing of negative-pressure air fan have: 1, motor noise depends primarily on transmission shaft that motor and motor be connected with motor and quality and the installation of bearing.2, negative-pressure air fan vibrating noise, the noise that negative-pressure air fan when operation vibrations produce, and fan blade balance and install whether relation is firmly arranged.3, operation wind is made an uproar, and it first is mainly the sound of blade wind cutting (exhausting) that wind is made an uproar, and motor speed, and leaf quality has relation.
Since hot-tempered sound is inevitable, how is so traditional hot-tempered mode of falling? in fact, general noise treatment, mostly all can start with from this three aspects:: by reducing the means such as reception of sound source, limit noise propagation, block noise, reach the purpose of controlling noise, on concrete noise control technique, the three kinds of measures of can adopting sound absorption, insulate against sound and eliminate the noise.The below introduces the sound absorption part.
When sound wave incided body surface, part acoustic energy will be absorbed by object and be converted into other forms of energy, is called sound absorption.The sound absorbing capabilities of material represents with coefficient of adsorption, and acoustic absorptivity is larger, represents that the sound absorbing capabilities of material is better.The incident angle of the sound absorbing capabilities of material and material character, structure and sound wave and the frequency of sound wave are relevant.The sound absorbing mechanism of sound-absorbing porous material is: material internal has the hole of countless tiny mutual perforations, incide the surface of these materials when sound wave, and then when inciding in these tiny holes, cause intrapore air movement, air near hole wall and fiber surface, because friction and viscous motion resistance are difficult for moving, make acoustic energy be converted into heat energy and consume.Therefore well behaved sound-absorbing material is wanted porous, interpenetrate between Kong Yukong, and the hole that connects to be in communication with the outside, make sound wave energy enter material internal.As corresponding 1000 hertz of sound waves, the acoustic absorptivity of the super glass wool that 10cm is thick is 0.87.
Consult shown in Figure 1ly, for absorbing the hot-tempered sound that negative-pressure air fan produces in the course of the work and embody appearance design theory attractive in appearance, intake grill 611 places of existing negative-pressure air fan 6 are equipped with venetian blind 67.But, because venetian blind 67 is to be fixedly mounted on negative-pressure air fan 6 shells 61, so it can not rotate and Self-adjustment with motor 62.And affected by environment, negative-pressure air fan 6 is but when negative-pressure air fan switching on and shutting down (especially impact particularly evident) that often changes from the indoor air-flow that attracts.Thus, when the air-flow of frequent variation passes through unalterable venetian blind, have unavoidably either large or small hot-tempered sound out (taking a bamboo trunk is example, as long as different transform orientation or change size and the frequency of air blowing air-flow several times, arbitrary bamboo trunk all can blow out sound).Simultaneously, during the motor normal operation, its rotating speed is fixed, therefore, the speed of the air-flow that negative-pressure air fan is discharged and intensity are determined by indoor environment and motor speed, and venetian blind does not have the buffering negative-pressure air fan fully from the indoor intensity of air-flow and the function of speed of discharging in this process.
Summary of the invention
The object of the present invention is to provide a kind of intake grill to be provided with the negative-pressure air fan of rotary blade fan,
For achieving the above object, negative-pressure air fan of the present invention comprises: shell, motor, flabellum and transmission shaft, wherein said motor and flabellum lay respectively in the intake grill and exhaust outlet at shell two ends, and are connected by transmission shaft.Motor drives the flabellum rotation by transmission shaft, reaches the effect of negative pressure ventilation.Characteristics of the present invention are that described shell intake grill place is provided with rotary blade fan, during fan operation, rotary blade fan rotates thereupon, so, can cushion negative-pressure air fan from indoor speed and intensity of discharging air-flow, thus reduce flabellum the hot-tempered sound of work, make indoor air flows soften, reduce the suffered wind cutting resistance of flabellum to extend flabellum working life.
As a further improvement on the present invention, the orientation of described rotary blade fan blade is consistent with the orientation of negative-pressure air fan flabellum.
As a further improvement on the present invention, the number of described rotary blade fan blade is no less than the number of negative-pressure air fan flabellum.
As a further improvement on the present invention, the distance between described rotary blade fan blade end and shell intake grill inner side surface is no more than 30mm.
As a further improvement on the present invention, the rotary middle point of described rotary blade fan is positioned on the elongation line of transmission shaft.
As a further improvement on the present invention, described rotary blade fan is fixed in the intake grill inner side edge by the metal cross structure.
As a further improvement on the present invention, described rotary blade fan is metal material.
As a further improvement on the present invention, described rotary blade fan is that glass fiber compound material is made.
As a further improvement on the present invention, described rotary blade fan is the plastic-steel material.
As a further improvement on the present invention, described rotary blade fan is the hard plastic material.
Compared with prior art, the invention has the beneficial effects as follows: sentence rotary blade fan at the negative-pressure air fan intake grill and replace traditional venetian blind.So, during the negative-pressure air fan operation, therefore rotary blade fan rotates thereupon, can cushion negative-pressure air fan from indoor speed and intensity of discharging air-flow, thereby the hot-tempered sound of work of reduction flabellum, makes indoor air flows soften, reduce the suffered wind cutting resistance of flabellum with prolongation flabellum working life
Description of drawings
Fig. 1 is the stereogram of existing negative-pressure air fan;
Fig. 2 is the stereogram of negative-pressure air fan of the present invention.
Fig. 3 is the sectional view of negative-pressure air fan of the present invention.
Embodiment
The present invention is described in detail below in conjunction with each mode of execution shown in the drawings; but should be noted that; these mode of executions are not limitation of the present invention; those of ordinary skills are according to these mode of executions institutes work energy, method or structural equivalent transformation or substitute, within all belonging to protection scope of the present invention.
Consult Fig. 2 and shown in Figure 3, Fig. 2 and Fig. 3 are respectively stereogram and the sectional view of the embodiment of the invention, and negative-pressure air fan 10 of the present invention comprises: shell 1, motor 2, flabellum 3, transmission shaft 4 and rotary blade fan 7.Wherein said motor 2 and flabellum 3 lay respectively in the intake grill 11 and exhaust outlet 12 at shell 1 interior two ends, and are connected by transmission shaft 4.During negative-pressure air fan 10 work, motor 2 drives flabellum 3 rotations by transmission shaft 4, reaches the effect of negative pressure ventilation.
Please further consult Fig. 2 and shown in Figure 3, rotary blade fan 7 involved in the present invention is installed in the intake grill 11 of negative-pressure air fan 10 shells 1, and is fixed in shell 1 intake grill 11 by metal cross 111.So, when negative-pressure air fan 10 started, when motor 2 rotation drive flabellums 3 rotated, attract indoor air flow to discharge, described rotary blade fan 7 rotated thereupon.As everyone knows, dynamic balance is only the most steady balance.Traditional venetian blind is because of its fixing exhaust clearance (spaces between two fan window leaves), may automatically not adjust with motor 2 rotating speeds and room pressure size, brings even sometimes larger hot-tempered sound when fan switch machine (especially).And rotary blade fan 7 of the present invention can be when switching on and shutting down, adjust rotating speed with the rotating speed of the motor 2 of negative-pressure air fan 10, and namely motor 2 rotating speeds are fast, its faster rotational speed, and motor 2 rotating speeds slow down, and its rotating speed is also thereupon slack-off.In addition due to the existence of the hinge of a fairly large number of rotary blade fan 7, make the air intake space of negative-pressure air fan 10 intake grills 11 effectively be divided into the air intake passage that more disperses, so, when negative-pressure air fan 10 is worked especially switching on and shutting down, all can get to a certain extent buffering from the intensity of indoor air-flow of discharging and speed, reach the effect of even air draft, thereby reduce the impact on indoor environment.Simultaneously, the hinge that rotary blade fan 7 is numerous is compared the hinge of traditional louver window, and its area of contacting with air-flow increases much undoubtedly, is conducive to more therefore to absorb that air-flow passes intake grill 11 and the hot-tempered sound of work when discharging exhaust outlet 12 is conducive to environmental protection.And because the described air-flow that is discharged from obtains certain buffering, therefore under the same speed conditions of motor 2, wind cutting (exhausting) resistance on negative-pressure air fan 10 flabellums 3 certainly will reduce thereupon, therefore can extend the working life of flabellum 3.In addition, compare traditional venetian blind, rotary blade fan 7 of the present invention obviously has advantages of and is easy to change and clean maintenance, and is also at all not defeated in traditional venetian blind on aesthetic property.
Further, the rotary middle point of rotary blade fan 7 involved in the present invention is positioned on the elongation line of transmission shaft 4, thereby more is conducive to cushion intensity and speed from indoor discharge air-flow.
Further, the number of the blade of rotary blade fan 7 involved in the present invention is no less than the number of negative-pressure air fan 10 flabellums 4.Because its page number of sheets order is more, its area that contacts with air-flow is larger, and the hot-tempered audio fruit that the air-flow discharge process that absorbs produces is more obvious.
Further, the distance of the inner side edge of rotary blade fan 7 blade ends involved in the present invention and shell 1 intake grill 11 is no more than 30mm.Nearer when the distance of the inner side edge of rotary blade fan 7 blade ends and shell 1 intake grill 11, the air intake passage that is representing whole intake grill 11 is separated into more more uniform vents by rotary blade fan is organic, obviously more is conducive to the hot-tempered sound of reduction work.
Further, rotary blade fan 7 involved in the present invention is metal material.
Further, rotary blade fan 7 involved in the present invention is made for glass fiber compound material.
Further, rotary blade fan 7 involved in the present invention is plastic-steel material.
Further, rotary blade fan 7 involved in the present invention is made for hard plastic.
Further, rotary blade fan 7 involved in the present invention also can be directly fixed on motor 2.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that do not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, therefore is intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any reference character in claim should be considered as limit related claim.
In addition, be to be understood that, although this specification is described according to mode of execution, but be not that each mode of execution only comprises an independently technological scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, and the technological scheme in each embodiment also can through appropriate combination, form other mode of executions that it will be appreciated by those skilled in the art that.
Claims (10)
1. negative-pressure air fan, comprising: shell, motor, flabellum and transmission shaft, wherein said motor and flabellum lay respectively in the intake grill and exhaust outlet at shell two ends, and are connected by transmission shaft, it is characterized in that: described intake grill place is provided with rotary blade fan.
2. negative-pressure air fan according to claim 1, it is characterized in that: the orientation of described rotary blade fan blade is consistent with the orientation of negative-pressure air fan flabellum.
3. negative-pressure air fan according to claim 2, it is characterized in that: the number of described rotary blade fan blade is no less than the number of negative-pressure air fan flabellum.
4. negative-pressure air fan according to claim 2, it is characterized in that: the distance between described rotary blade fan blade end and shell intake grill inner side surface is no more than 30mm.
5. negative-pressure air fan according to claim 2, it is characterized in that: the rotary middle point of described rotary blade fan is positioned on the elongation line of transmission shaft.
6. negative-pressure air fan according to claim 2, it is characterized in that: described rotary blade fan is fixed in the intake grill inner side edge by the metal cross structure.
7. negative-pressure air fan according to claim 2, it is characterized in that: described rotary blade fan is metal material.
8. negative-pressure air fan according to claim 2, it is characterized in that: described rotary blade fan is that glass fiber compound material is made.
9. negative-pressure air fan according to claim 2, it is characterized in that: described rotary blade fan is the plastic-steel material.
10. negative-pressure air fan according to claim 2, it is characterized in that: described rotary blade fan is the hard plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105363816A CN103104516A (en) | 2012-12-13 | 2012-12-13 | Negative-pressure fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105363816A CN103104516A (en) | 2012-12-13 | 2012-12-13 | Negative-pressure fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103104516A true CN103104516A (en) | 2013-05-15 |
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ID=48312634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105363816A Pending CN103104516A (en) | 2012-12-13 | 2012-12-13 | Negative-pressure fan |
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| Country | Link |
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| CN (1) | CN103104516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766048A (en) * | 2016-11-30 | 2017-05-31 | 湖州佑华机电设备有限公司 | A kind of central air-conditioning air outlet structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60142098A (en) * | 1983-12-28 | 1985-07-27 | Toshiba Corp | Motor fan |
| CN2051686U (en) * | 1989-08-15 | 1990-01-24 | 周心贤 | High efficiency, low pressure axial flow ventilator |
| CN2326759Y (en) * | 1997-11-11 | 1999-06-30 | 丘家以 | Exhausting fan convenient for washing used in kitchen |
| CN2553153Y (en) * | 2002-07-08 | 2003-05-28 | 张志平 | Small booster-type axial-flow fan |
-
2012
- 2012-12-13 CN CN2012105363816A patent/CN103104516A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60142098A (en) * | 1983-12-28 | 1985-07-27 | Toshiba Corp | Motor fan |
| CN2051686U (en) * | 1989-08-15 | 1990-01-24 | 周心贤 | High efficiency, low pressure axial flow ventilator |
| CN2326759Y (en) * | 1997-11-11 | 1999-06-30 | 丘家以 | Exhausting fan convenient for washing used in kitchen |
| CN2553153Y (en) * | 2002-07-08 | 2003-05-28 | 张志平 | Small booster-type axial-flow fan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766048A (en) * | 2016-11-30 | 2017-05-31 | 湖州佑华机电设备有限公司 | A kind of central air-conditioning air outlet structure |
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Application publication date: 20130515 |