CN105115123A - Return air inlet of air duct - Google Patents
Return air inlet of air duct Download PDFInfo
- Publication number
- CN105115123A CN105115123A CN201510578378.4A CN201510578378A CN105115123A CN 105115123 A CN105115123 A CN 105115123A CN 201510578378 A CN201510578378 A CN 201510578378A CN 105115123 A CN105115123 A CN 105115123A
- Authority
- CN
- China
- Prior art keywords
- archimedes
- air inlet
- air channel
- spiral
- return air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a return air inlet of an air duct. The return air inlet of the air duct is arranged in one end of an air channel of the air duct. A fan is arranged in the position, opposite to the return air inlet of the air duct, in the air channel. The shape of the return air inlet of the air duct is a non-round closed curve formed by connecting an Archimedes spiral line and an arc in an end-to-end mode, wherein the expansion direction of the Archimedes spiral line is opposite to the rotation direction of blades of the fan. The area of the return air inlet of the air duct is larger than that of an original return air inlet of an air duct, the diameter of the return air inlet of the air duct is gradually decreased in the acceleration direction of the blades to airflow, inlet acceleration of the airflow can be better facilitated, and therefore the air return efficiency is improved. In addition, the return air inlet of the air duct is closer to the return airflow direction, inlet vortexes are reduced easily and the air return efficiency is improved.
Description
Technical field
The present invention relates to ventilation field, specifically, relate to a kind of air channel return air inlet.
Background technology
As shown in Figure 1, in general, air channel is made up of gas passage 2 and the return air inlet 1 be communicated with gas passage and air outlet, and in described gas passage and the position relative with described return air inlet 1 is provided with fan 3 for return air.But existing return air inlet 1 is generally circular, during blower fan high-speed rotation, local eddy currents can be formed at return air inlet place, affect return air efficiency.
Summary of the invention
The invention provides a kind of air channel return air inlet, technical problem to be solved be traditional return air inlet when blower fan high-speed rotation, local eddy currents can be formed at return air inlet place, affect the problem of return air efficiency.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
The invention provides a kind of air channel return air inlet, described air channel return air inlet is arranged on one end of the gas passage in air channel, gas passage is interior and the position relative with air channel return air inlet is provided with fan, the shape of described air channel return air inlet is to be joined end to end the non-circular closed curve formed by one section of spiral of Archimedes and one section of circular arc, and wherein the dimension of spiral of Archimedes turns to contrary with the fan blade of fan.
Spiral of Archimedes is otherwise known as Archimedes spiral, also known as " constant velocity spiral ".Helical refers to that some rotate and the curve constantly shrinking or expand round some fixed point or axle, and Archimedes spiral is a kind of dimensional spiral.In " opinion helical ", Archimedes gives as given a definition: as 1 P along dynamic ray OP with while waiting rate motion, this ray rotates around an O with constant angular velocity again, and the track of some P is called " Archimedes spiral ".
On the basis of technique scheme, the present invention can also do following improvement.
Further, the pivot of described spiral of Archimedes overlaps with the subpoint of the center of described fan in spiral of Archimedes place plane, the pivot of described spiral of Archimedes and the center of described fan along fan shaft to distance be 5-8mm, wherein, the central point of the rotation when pivot of described spiral of Archimedes refers to that spiral of Archimedes of the present invention is complete helix line.
The beneficial effect of above-mentioned further scheme is adopted to be: the pivot of spiral of Archimedes overlaps with the subpoint of the center of described fan in spiral of Archimedes place plane, make air channel return air inlet better corresponding with the position of fan, thus the resistance that reduction air channel return air inlet brings, thus be more conducive to the entry accelerated of air-flow, thus improve return air efficiency.
Further, the length of the initial radium of described spiral of Archimedes is the 75%-85% of the length of fan radius, wherein, the initial radium of described spiral of Archimedes refers to the radius of one section of spiral of Archimedes along the section start of its direction of rotation of intercepting of the present invention.
The beneficial effect of above-mentioned further scheme is adopted to be: because the radius of spiral of Archimedes increases gradually along with its direction of rotation, so, the length of the initial radium of spiral of Archimedes is set to the 75%-85% of the length of fan radius, the area of air channel of the present invention return air inlet is made to be greater than the area of original air channel return air inlet, and the diameter of air channel return air inlet reduces gradually along the acceleration direction of fan blade to air-flow, more be conducive to the entry accelerated of air-flow, thus improve return air efficiency.
Further, the length of the initial radium of described spiral of Archimedes is 80% of the length of fan radius.
Further, the rotation starting point of described spiral of Archimedes and the center of described fan are a horizontal linear at the line of the subpoint of spiral of Archimedes place plane, wherein, the rotation starting point of spiral of Archimedes refers to the starting point of one section of spiral of Archimedes along its direction of rotation of intercepting of the present invention.
The beneficial effect of above-mentioned further scheme is adopted to be: the rotation starting point of spiral of Archimedes and the center of circle of described fan are horizontal when designing by air channel of the present invention return air inlet, the direction of rotation of air channel of the present invention return air inlet is more fitted the flow direction of return air stream, be conducive to the formation reducing return air inlet place, air channel eddy current, improve return air efficiency.
Further, central angle alpha between the rotation starting point of described spiral of Archimedes and the rotation terminal of spiral of Archimedes is 280-330 °, the rotation terminal of wherein said spiral of Archimedes refers to that the terminating point of one section of spiral of Archimedes along its direction of rotation of intercepting of the present invention, described central angle alpha refer to the rotation starting point of described spiral of Archimedes and the anglec of rotation rotated before terminal.
The beneficial effect of above-mentioned further scheme is adopted to be: the central angle alpha between the rotation Origin And Destination of described spiral of Archimedes to be limited to as between 280-330 °, to ensure sufficiently long spiral of Archimedes thus making the direction of rotation of air channel of the present invention return air inlet can play the effect of the flow direction of return air stream of more fitting on the one hand, thus be conducive to the formation reducing return air inlet place, air channel eddy current, improve return air efficiency; Being on the other hand for connecting the starting point of spiral of Archimedes and the circular arc of terminal leaves enough leeway, being convenient to smooth connection therebetween, more attractive in appearancely also more meet hydromechanical demand.
Further, the central angle alpha between the rotation Origin And Destination of described spiral of Archimedes is 310 °.
Further, described spiral of Archimedes and the smooth connection of described circular arc.
Adopt the beneficial effect of above-mentioned further scheme to be: spiral of Archimedes and circular arc in smoothing junction thus make to form air channel return air inlet and have smooth inwall, more meet hydromechanical demand, reducing friction resistance, reduce air quantity loss, the efficiency of blower fan is played to ultimate attainment, by lower power consumption to bottom line, and also more attractive in appearance being more easy to is processed and is installed.
The invention still further relates to a kind of air channel, described air channel comprises gas passage, air channel return air inlet and fan, wherein, described air channel return air inlet is arranged on one end of the gas passage in air channel, gas passage is interior and the position relative with air channel return air inlet is provided with fan, the shape of described air channel return air inlet is that wherein the dimension of spiral of Archimedes turns to contrary with fan blade by one section of spiral of Archimedes and one section of end to end non-circular structure formed of circular arc; The pivot of described spiral of Archimedes overlaps with the subpoint of the center of described fan in spiral of Archimedes place plane, the pivot of described spiral of Archimedes and the center of described fan along fan shaft to distance be 5-8mm, the length of the initial radium of described spiral of Archimedes can be 80% of the radius length of fan; The rotation starting point of described spiral of Archimedes and described fan center are a horizontal linear at the line of the subpoint of spiral of Archimedes place plane, and the central angle alpha between the rotation Origin And Destination of described spiral of Archimedes can be 310 °.
The invention still further relates to a kind of refrigerator, described refrigerator is provided with air channel, described air channel comprises gas passage, air channel return air inlet and fan, wherein, described air channel return air inlet is arranged on one end of the gas passage in air channel, gas passage is interior and the position relative with air channel return air inlet is provided with fan, and the shape of described air channel return air inlet is that wherein the dimension of spiral of Archimedes turns to contrary with the fan blade of fan by one section of spiral of Archimedes and one section of end to end non-circular structure formed of circular arc; The pivot of described spiral of Archimedes overlaps with the subpoint of the center of described fan in spiral of Archimedes place plane, the pivot of described spiral of Archimedes and the center of described fan along fan shaft to distance be 5-8mm, the length of the initial radium of described spiral of Archimedes can be 80% of the radius length of fan; The rotation starting point of described spiral of Archimedes and described fan center are a horizontal linear at the line of the subpoint of spiral of Archimedes place plane, and the central angle alpha between the rotation Origin And Destination of described spiral of Archimedes can be 310 °.Because described air channel has higher return air amount and return air efficiency, thus greatly can reduce the size of described return air inlet, the space that described air channel takies can be reduced, thus the usage space of the refrigeration compartment of described refrigerator can be increased.
The invention has the beneficial effects as follows: the area of air channel of the present invention return air inlet is greater than the area of original air channel return air inlet, and the diameter of air channel return air inlet reduces gradually along the acceleration direction of fan blade to air-flow, more be conducive to the entry accelerated of air-flow, thus improve return air efficiency; In addition air channel of the present invention return air inlet is more fitted return air stream direction, is conducive to reducing into opening vortex, improves return air efficiency.
Accompanying drawing explanation
Fig. 1 is the decomposition texture schematic diagram with the air channel of air channel return air inlet in prior art.
Fig. 2 is the decomposition texture schematic diagram with the air channel of air channel return air inlet in the present invention.
Fig. 3 is the structural representation of the air channel return air inlet in the present invention.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 3, the invention provides a kind of air channel return air inlet 4, described air channel return air inlet 4 is arranged on one end of the gas passage 2 in air channel, gas passage 2 is interior and the position relative with air channel return air inlet 4 is provided with fan 3, the shape of described air channel return air inlet 4 is that wherein the dimension of spiral of Archimedes 41 turns to contrary with the fan blade of fan 3 by one section of spiral of Archimedes 41 and one section of end to end non-circular closed curve formed of circular arc 42; The pivot of described spiral of Archimedes 41 overlaps with the subpoint of the center of described fan 3 in spiral of Archimedes 41 place plane, the pivot of described spiral of Archimedes 41 and the center of described fan 3 along fan shaft to distance be 5-8mm, the length of the initial radium of described spiral of Archimedes 41 is 80% of the radius length of fan 3; Rotation starting point 43 and described fan 3 center of described spiral of Archimedes 41 are a horizontal linear at the line of the subpoint of spiral of Archimedes 41 place plane, and the central angle alpha between the rotation starting point 43 of described spiral of Archimedes 41 and terminal 44 is 310 °.
As shown in Figure 2, the invention still further relates to a kind of air channel, described air channel comprises gas passage 2, air channel return air inlet 4 and fan 3, wherein, described air channel return air inlet 4 is arranged on one end of the gas passage 2 in air channel, gas passage 2 is interior and the position relative with air channel return air inlet 4 is provided with fan 3, the shape of described air channel return air inlet 4 is that wherein the dimension of spiral of Archimedes 41 turns to contrary with the fan blade of fan 3 by one section of spiral of Archimedes 41 and one section of end to end non-circular closed curve formed of circular arc 42; The pivot of described spiral of Archimedes 41 overlaps with the subpoint of the center of described fan 3 in spiral of Archimedes 41 place plane, the pivot of described spiral of Archimedes 41 and the center of described fan 3 along fan shaft to distance be 5-8mm, the length of the initial radium of described spiral of Archimedes 41 is 80% of the radius length of fan 3; Rotation starting point 43 and described fan 3 center of described spiral of Archimedes 41 are a horizontal linear at the line of the subpoint of spiral of Archimedes 41 place plane, and the central angle alpha between the rotation starting point 43 of described spiral of Archimedes 41 and terminal 44 is 310 °.
The invention still further relates to a kind of refrigerator, described refrigerator comprises air channel, described air channel comprises gas passage 2, air channel return air inlet 4 and fan 3, wherein, described air channel return air inlet 4 is arranged on one end of the gas passage 2 in air channel, gas passage 2 is interior and the position relative with air channel return air inlet 4 is provided with fan 3, the shape of described air channel return air inlet 4 is that wherein the dimension of spiral of Archimedes 41 turns to contrary with the fan blade of fan 3 by one section of spiral of Archimedes 41 and one section of end to end non-circular closed curve formed of circular arc 42; The pivot of described spiral of Archimedes 41 overlaps with the subpoint of the center of described fan 3 in spiral of Archimedes 41 place plane, the pivot of described spiral of Archimedes 41 and the center of described fan 3 along fan shaft to distance be 5-8mm, the length of the initial radium of described spiral of Archimedes 41 is 80% of the radius length of fan 3; Rotation starting point 43 and described fan 3 center of described spiral of Archimedes 41 are a horizontal linear at the line of the subpoint of spiral of Archimedes 41 place plane, and the central angle alpha between the rotation starting point 43 of described spiral of Archimedes 41 and terminal 44 is 310 °.
In describing the invention, it will be appreciated that, term " spacing ", " distance ", " close ", " away from ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. an air channel return air inlet, described air channel return air inlet (4) is arranged on one end of the gas passage (2) in air channel, in gas passage (2), the position relative with air channel return air inlet (4) is provided with fan (3), it is characterized in that, the shape in described air channel return air inlet (4) is that the dimension of wherein said spiral of Archimedes (41) turns to contrary with the fan blade of fan (3) by one section of spiral of Archimedes (41) and one section of circular arc (42) end to end non-circular closed curve formed.
2. air channel according to claim 1 return air inlet, it is characterized in that, the pivot of described spiral of Archimedes (41) overlaps with the subpoint of the center of described fan (3) in spiral of Archimedes (41) place plane, the pivot of described spiral of Archimedes (41) and the center of described fan (3) along fan shaft to distance be 5-8mm.
3. air channel according to claim 1 return air inlet, is characterized in that, the length of the initial radium of described spiral of Archimedes (41) is the 75%-85% of the radius length of fan (3).
4. air channel according to claim 3 return air inlet, is characterized in that, the length of the initial radium of described spiral of Archimedes (41) is 80% of the radius length of fan (3).
5. air channel according to claim 1 return air inlet, it is characterized in that, rotation starting point (43) and described fan (3) center of described spiral of Archimedes (41) are a horizontal linear at the line of the subpoint of spiral of Archimedes (41) place plane.
6. air channel according to claim 1 return air inlet, is characterized in that, the central angle alpha between the rotation starting point (43) of described spiral of Archimedes (41) and terminal (44) is 280-330 °.
7. air channel according to claim 6 return air inlet, is characterized in that, the central angle alpha between the rotation starting point (43) of described spiral of Archimedes (41) and terminal (44) is 310 °.
8. air channel according to claim 1 return air inlet, is characterized in that, in smoothing junction between described spiral of Archimedes (41) and described circular arc (42).
9. an air channel, is characterized in that, described air channel comprises the air channel return air inlet described in any one of claim 1-8.
10. a refrigerator, is characterized in that, described refrigerator comprises air channel according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510578378.4A CN105115123B (en) | 2015-09-10 | 2015-09-10 | A kind of air duct return air inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510578378.4A CN105115123B (en) | 2015-09-10 | 2015-09-10 | A kind of air duct return air inlet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105115123A true CN105115123A (en) | 2015-12-02 |
| CN105115123B CN105115123B (en) | 2018-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510578378.4A Active CN105115123B (en) | 2015-09-10 | 2015-09-10 | A kind of air duct return air inlet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105115123B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009023315A1 (en) * | 2009-05-29 | 2010-12-02 | Minebea Co., Ltd. | Radial fan comprises spiral housing, in which blower wheel is accommodated, where geometric center point of surface of inflow opening is shifted according to rotational axis of blower wheel in area |
| CN102536850A (en) * | 2010-12-14 | 2012-07-04 | 台达电子工业股份有限公司 | Centrifugal fan |
| CN203412818U (en) * | 2013-07-18 | 2014-01-29 | 苏州三星电子有限公司 | Condensing and drying device and air inlet structure of centrifugal fan of condensing and drying device |
| CN203605582U (en) * | 2013-10-30 | 2014-05-21 | 合肥华凌股份有限公司 | Air channel component and refrigerator with same |
| CN104101159A (en) * | 2014-08-06 | 2014-10-15 | 合肥华凌股份有限公司 | Air channel module for refrigerator and refrigerator |
| CN204027127U (en) * | 2014-06-25 | 2014-12-17 | 合肥华凌股份有限公司 | Wind cooling refrigerator and air channel thereof |
| CN104236200A (en) * | 2014-09-04 | 2014-12-24 | 合肥华凌股份有限公司 | Air cooling refrigerator and air passage of air cooling refrigerator |
| CN205079414U (en) * | 2015-09-10 | 2016-03-09 | 合肥华凌股份有限公司 | Wind channel return air inlet |
-
2015
- 2015-09-10 CN CN201510578378.4A patent/CN105115123B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009023315A1 (en) * | 2009-05-29 | 2010-12-02 | Minebea Co., Ltd. | Radial fan comprises spiral housing, in which blower wheel is accommodated, where geometric center point of surface of inflow opening is shifted according to rotational axis of blower wheel in area |
| CN102536850A (en) * | 2010-12-14 | 2012-07-04 | 台达电子工业股份有限公司 | Centrifugal fan |
| CN203412818U (en) * | 2013-07-18 | 2014-01-29 | 苏州三星电子有限公司 | Condensing and drying device and air inlet structure of centrifugal fan of condensing and drying device |
| CN203605582U (en) * | 2013-10-30 | 2014-05-21 | 合肥华凌股份有限公司 | Air channel component and refrigerator with same |
| CN204027127U (en) * | 2014-06-25 | 2014-12-17 | 合肥华凌股份有限公司 | Wind cooling refrigerator and air channel thereof |
| CN104101159A (en) * | 2014-08-06 | 2014-10-15 | 合肥华凌股份有限公司 | Air channel module for refrigerator and refrigerator |
| CN104236200A (en) * | 2014-09-04 | 2014-12-24 | 合肥华凌股份有限公司 | Air cooling refrigerator and air passage of air cooling refrigerator |
| CN205079414U (en) * | 2015-09-10 | 2016-03-09 | 合肥华凌股份有限公司 | Wind channel return air inlet |
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| Publication number | Publication date |
|---|---|
| CN105115123B (en) | 2018-07-31 |
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