CN203412818U - Condensing and drying device and air inlet structure of centrifugal fan of condensing and drying device - Google Patents
Condensing and drying device and air inlet structure of centrifugal fan of condensing and drying device Download PDFInfo
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- CN203412818U CN203412818U CN201320428663.4U CN201320428663U CN203412818U CN 203412818 U CN203412818 U CN 203412818U CN 201320428663 U CN201320428663 U CN 201320428663U CN 203412818 U CN203412818 U CN 203412818U
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Abstract
The utility model discloses an air inlet structure of a centrifugal fan. Aiming at an asymmetric structure of an air outlet connected with the air inlet of the fan, two parts of the air inlet of the fan, which are respectively close to and far away from a volute tongue, are enabled to be asymmetric, and the area of a second air inlet region far away from the volute tongue is larger than that of a first air inlet region close to the volute tongue, so more air inlet airflow is guided towards a region which has a better air inlet condition and is far away from the volute tongue, and a region which has a poorer air inlet condition and is close to the volute tongue is avoided possibly. Compared with the prior art, the air inlet structure of the centrifugal fan can be used for improving the performance of the fan, has higher air volume under the same fan rotating speed as comparison with circular and elliptic air inlets and is uniform in inlet air at the air inlet. The utility model also provides a condensing and drying device with the air inlet structure of the centrifugal fan.
Description
Technical field
The utility model relates to centrifugal blower technical field, particularly a kind of condensation drying device and air inlet of centrifugal fan structure thereof.
Background technique
It is that a kind of three-dimensional asymmetric of complexity flows that the internal gas flow of centrifugal blower flows, and its wind inlet of fan plays guiding function to air-flow, so air inlet structure parameter will affect the performance of centrifugal blower.
Take multi-blade fan as example, and its intake grill mostly is regular round structure, and this kind is symplex structure in a circumferential direction; And the spiral case of multi-blade fan is non-symmetry structure, so its exhaust outlet air-flow circumferentially distributing very inhomogeneously, causes the air inlet at intake grill place also inhomogeneous, causes the problems such as the low and noise height of fan efficiency.
In the prior art, application number 200910225153.5, denomination of invention is the Chinese patent of " a kind of spiral case of forward multiple wing centrifugal blower fan ", oval by intake grill being done to ovalisation or class, improves fan performance.
But by theory analysis and experimental verification, above-mentioned oval air inlet structure is not very suitable for the asymmetric flow field of impeller inlet yet, adopt the centrifugal blower performance boost of this structure limited, can not meet design requirement.
Therefore, for above-mentioned situation, in order to change these deficiencies, how to design rational air inlet structure, make air-flow enter more uniformly fan, thereby improve the performance of centrifugal blower, become those skilled in the art's important technological problems urgently to be resolved hurrily.
Model utility content
In view of this, the utility model provides a kind of air inlet of centrifugal fan structure, adopts rational air inlet structure, makes air-flow enter more uniformly fan, can improve the performance of centrifugal blower.
The utility model also provides a kind of condensation drying device of having applied above-mentioned air inlet of centrifugal fan structure.
For achieving the above object, the utility model provides following technological scheme:
A kind of air inlet of centrifugal fan structure, get intake grill middle corresponding to point centered by the position of fan center, described intake grill forms the first air intake region near the partial contour of snail tongue to described central point, described intake grill forms the second air intake region away from the partial contour of snail tongue to described central point, the area in described the second air intake region is greater than the area in described the first air intake region, and the profile in the profile in described the first air intake region and the second air intake region is connected and forms whole intake grill.
Preferably, intake grill profile corresponding to described the first air intake region is arcuate structure, and intake grill profile corresponding to described the second air intake region is class rectangular configuration, at its place, right angle, makes chamfered.
Preferably, intake grill profile end corresponding to described the first air intake region is specially semicircle, ellipse or spiral yarn shaped, and described semicircle, ellipse or spiral yarn shaped profile are connected with the profile in described the second air intake region by straightway.
Preferably, getting limit relative with the end of described the first air intake region contour in the rectangular profile in described the second air intake region is first side, and the length of described first side is identical with the semicircular diameter D of the end of described the first air intake region contour.
Preferably, getting limit relative with the end of described the first air intake region contour in the class rectangular profile in described the second air intake region is first side, the length of described first side is identical with described oval-shaped long axis length or minor axis length, or identical with one of diameter of helix.
Preferably, the line of described central point and snail tongue center of circle subpoint and the angle theta between the symmetrical line of described intake grill profile are-60 °～80 °.
Preferably, the diameter D of described semi-circular profile is 0.7～0.85 with the ratio of fan external diameter, and the second length of side L of described rectangular profile is 0.4～0.45 with the ratio of fan external diameter.
Preferably, the chamfering radius R at place, described rectangular profile right angle and the ratio of fan external diameter are 0.15-0.25.
Preferably, described fan is 0.03～0.04 apart from the beeline d of described intake grill and the ratio of fan external diameter.
A drying device, its centrifugal blower has above-mentioned air inlet structure.
From above-mentioned technological scheme, can find out, the air inlet of centrifugal fan structure that the utility model provides, be directed to the non-symmetry structure in the air port that connects described air inlet, by making blower fan be greater than the first air intake region near snail tongue away from the second air intake region area of snail tongue, air intake air-flow, more to inlet air conditions preferably away from the guiding of territory, spiral inlet area, is avoided to the poor territory, close spiral inlet area of inlet air conditions as far as possible; Compared with prior art, this air inlet of centrifugal fan structure can improve the performance of fan, and under equal rotation speed of the fan, air quantity is larger than circle, oval air port, and intake grill place air intake is even.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The air inlet of centrifugal fan profile diagram that Fig. 1 provides for the utility model embodiment;
The fan structure figure that Fig. 2 provides for the utility model embodiment;
The external cylinder of drum-type washing machine schematic diagram that Fig. 3 provides for the utility model embodiment;
Fig. 4 is the wind quantity test curve of oval intake grill model under different rotating speeds in this patent intake grill (new inlet) and existing patent.
Wherein, 1 is air channel, and 2 is intake grill, and 3 is fan, and 4 is condensator outlet, and 5 is condenser, and 6 is condenser inlet, and 7 is urceolus.
Embodiment
The utility model discloses a kind of air inlet of centrifugal fan structure, adopt rational air inlet structure, make air-flow enter more uniformly fan, can improve the performance of centrifugal blower.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-Fig. 3, the air inlet of centrifugal fan profile diagram that Fig. 1 provides for the utility model embodiment; The fan structure figure that Fig. 2 provides for the utility model embodiment; The external cylinder of drum-type washing machine schematic diagram that Fig. 3 provides for the utility model embodiment.
The air inlet of centrifugal fan structure that the utility model embodiment provides, get intake grill 2 middle corresponding to point centered by the position of fan center, intake grill 2 forms the first air intake region near the partial contour of snail tongue to central point, intake grill 2 forms the second air intake region away from the partial contour of snail tongue to central point, its core improvement is, the area in the second air intake region is greater than the area in the first air intake region, and the profile in the profile in the first air intake region and the second air intake region is connected and forms whole intake grill 2.
From above-mentioned technological scheme, can find out, the air inlet of centrifugal fan structure that the utility model embodiment provides, be directed to the non-symmetry structure in the air port that connects described air inlet, make air inlet 2 close and asymmetric away from this two-part profile of snail tongue, and the second air intake region area away from snail tongue is greater than the first air intake region near snail tongue, air intake air-flow, more to inlet air conditions preferably away from the guiding of territory, spiral inlet area, is avoided to the poor territory, close spiral inlet area of inlet air conditions as far as possible; Compared with prior art, this air inlet of centrifugal fan structure can improve the performance of fan, and under equal rotation speed of the fan, air quantity is larger than circle, oval air port, and intake grill place air intake is even.
In order to make air inlet effect better, the exterior feature of intake grill 2 should be rounder and more smooth curve.As preferably, intake grill profile corresponding to the first air intake region is arcuate structure, and intake grill profile corresponding to the second air intake region is class rectangular configuration, at its place, right angle, makes chamfered.
In this programme specific embodiment, intake grill profile end corresponding to the first air intake region is specially semicircle, and its structure as shown in Figure 1.Certainly, the semicircle in intake grill 2 shapes can also be done ovalisation or spiral yarn shaped, or the arcuate structure of other shapes, to these those skilled in the art, can make according to actual needs suitable adjustment, does not repeat them here.Above-mentioned semicircle, ellipse or spiral yarn shaped profile are connected with the profile in the second air intake region by straightway.
The semicircular structure of take is below described further this programme as example.The air inlet of centrifugal fan structure that the utility model embodiment provides, getting limit relative with the end of the first air intake region contour in the rectangular profile in the second air intake region is first side, the length of first side is identical with the semicircular diameter D of the end of the first air intake region contour, and its structure can be with reference to Figure of description 1.Similarly, when intake grill profile end corresponding to the first air intake region is while being oval or spiral yarn shaped, the length of first side is identical with oval-shaped long axis length or minor axis length, or identical with one of diameter of helix.
In this programme embodiment, line and the angle theta between the symmetrical line of intake grill profile of central point and snail tongue center of circle subpoint are-60 °～80 °.By adjusting the concrete set-up mode of intake grill 2, can make further lifting to the performance of centrifugal blower: when intake grill 2 is larger near the air intake region area of spiral case outlet away from snail tongue, can be effectively compared with low noise; When intake grill 2 is larger away from the air intake region area of snail tongue and spiral case outlet, can promote to greatest extent air quantity.
Concrete, the diameter D of semi-circular profile is 0.7～0.85 with the ratio of fan 3 external diameters; Getting the limit connecting for same semi-circular profile in rectangular profile is Second Edge, and the length L of Second Edge is 0.4～0.45 with the ratio of fan 3 external diameters.The chamfering radius R at place, rectangular profile right angle is 0.15-0.25 with the ratio of fan 3 external diameters.Fan 3 is that d is 0.03～0.04 with the ratio of fan 3 external diameters apart from the beeline of intake grill 2.
It should be noted that; below just provided comparatively preferred implementation; the shape and size of intake grill 2 are not limited only to this, can derive similar technological scheme, within the similar scheme of revising according to the utility model all belongs to protection domain of the present utility model.
I take charge of application number 201220523386.0, model utility name is called the Chinese patent of " a kind of condensing type drying device ", the intake grill in the condensation air channel of its condenser comprises and is formed at condenser near the enlarging of the wall bottom of cylinder one side, and one section of smooth circular arc of two ends of connection enlarging, enlarging with the joint of circular arc be round and smooth a connection, intake grill and condensation air channel are that curved surface is connected away from the wall bottom of cylinder one side, make the wind that enters intake grill enter condensation air channel with rounder and more smooth angle, thereby suffered resistance when effectively reducing wind and entering condensation air channel, the damp and hot air of high temperature that condensing type drying device is produced when drying operation is more easily discharged, improved the drying efficiency of drying device, on the other hand, when the setting of enlarging makes intake grill and dries operation, result from the area of contact increase that thing to be dried holds hot and humid degree water vapor in assembly, can introduce more hot and humid degree water vapor, further improved the heat exchange efficiency of drying device.
Its structure can be with reference to shown in accompanying drawing 3, will be through entering air inlet of centrifugal fan after a bending from condensator outlet 4 gas out, and drag losses is larger like this.
The above-mentioned patent (201220523386.0 that the utility model can coordinate me to take charge of just, a kind of condensing type drying device), on the basis of its condensation air flue structure, the application's scheme reduces resistance by changing the shape of air inlet, can improve systematic air flow, reduce system resistance.
The utility model embodiment also provides a kind of condensation drying device, and its centrifugal blower has above-mentioned air inlet structure, by adopting rational air inlet structure, makes air-flow enter more uniformly fan, can improve the performance of centrifugal blower.
The intake grill form of centrifugal blower provided by the utility model can specifically be applied to dry the drying devices such as vessel, textile product, food, medicinal material, timber.For example, for drying the condensation drying device of vessel, for drying the condensation drying device of textile product, for drying the condensation drying device of grain, for drying the condensation drying device of medicinal material, for drying condensation drying device of sheet material etc.
When this intake grill is used for drying vessel, for example dry bowl and plate, this intake grill form can be applicable to have on the dishwasher of drying function.
When this intake grill is used for drying textile product, drying clothes for example, this intake grill can be arranged on the washing machine with drying function.
Please refer to Fig. 1-Fig. 3, it is illustrative examples that the present embodiment be take washing and drying one body washer, concrete principle is: from inner cylinder for drum washing machine hot and humid air out, enter urceolus 7, then by condenser inlet 6, enter condenser 5 and carry out condensation, then by condensator outlet 4, flowed out, by intake grill 2, enter air channel 1,3 pairs of air-flows of fan do work, air heats in air channel, then flows into inner core.
Fan is multiple wing centrifugal fan, fan external diameter is D1:133mm, internal diameter is D2:106mm, spiral case molded line is spiral of Archimedes, whirlpool tongue radius is R:13.7mm, with the ratio of fan external diameter be 0.103, on fan, dish is 4.5mm apart from the distance between spiral case, account for 0.0338 of fan external diameter, the line of the symmetrical line of Fig. 1 air port profile and fan center-snail tongue center of circle subpoint has an angle theta, θ is 26 °, half circular diameter D gets 101mm, account for 0.76 of fan external diameter, another length of side L of rectangle is 59mm, account for 0.44 of fan external diameter, the chamfering radius R26mm of place, rectangle right angle, account for 0.195 of fan external diameter.
Through verification experimental verification and CFD simulation calculation, this intake grill form is larger than traditional circular intake grill air quantity.Fig. 4 is the wind quantity test curve of oval intake grill model under different rotating speeds in this patent intake grill (new inlet) and existing patent, under 2400rpm, compare air quantity and improve 5.6%, under 2500rpm, compare and improve 6.8%, under 2600rpm, compare and improve 7.7%.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiments, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an air inlet of centrifugal fan structure, get intake grill middle corresponding to point centered by the position of fan center, described intake grill forms the first air intake region near the partial contour of snail tongue to described central point, described intake grill forms the second air intake region away from the partial contour of snail tongue to described central point, it is characterized in that, the area in described the second air intake region is greater than the area in described the first air intake region, and the profile in the profile in described the first air intake region and the second air intake region is connected and forms whole intake grill.
2. air inlet of centrifugal fan structure according to claim 1, it is characterized in that, intake grill profile corresponding to described the first air intake region is arcuate structure, and intake grill profile corresponding to described the second air intake region is class rectangular configuration, at its place, right angle, makes chamfered.
3. air inlet of centrifugal fan structure according to claim 2, it is characterized in that, intake grill profile end corresponding to described the first air intake region is specially semicircle, ellipse or spiral yarn shaped, and described semicircle, ellipse or spiral yarn shaped profile are connected with the profile in described the second air intake region by straightway.
4. air inlet of centrifugal fan structure according to claim 3, it is characterized in that, getting limit relative with the end of described the first air intake region contour in the rectangular profile in described the second air intake region is first side, and the length of described first side is identical with the semicircular diameter D of the end of described the first air intake region contour.
5. air inlet of centrifugal fan structure according to claim 3, it is characterized in that, getting limit relative with the end of described the first air intake region contour in the class rectangular profile in described the second air intake region is first side, the length of described first side is identical with described oval-shaped long axis length or minor axis length, or identical with one of diameter of helix.
6. air inlet of centrifugal fan structure according to claim 5, is characterized in that, line and the angle theta between the symmetrical line of described intake grill profile of described central point and snail tongue center of circle subpoint are-60 °～80 °.
7. air inlet of centrifugal fan structure according to claim 6, is characterized in that, the diameter D of described semi-circular profile is 0.7～0.85 with the ratio of fan external diameter, and the second length of side L of described rectangular profile is 0.4～0.45 with the ratio of fan external diameter.
8. air inlet of centrifugal fan structure according to claim 7, is characterized in that, the chamfering radius R at place, described rectangular profile right angle is 0.15-0.25 with the ratio of fan external diameter.
9. air inlet of centrifugal fan structure according to claim 8, is characterized in that, described fan is 0.03～0.04 apart from the beeline d of described intake grill and the ratio of fan external diameter.
10. a condensation drying device, is characterized in that, its centrifugal blower has the air inlet structure as described in claim 1-9 any one.
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| CN201320428663.4U CN203412818U (en) | 2013-07-18 | 2013-07-18 | Condensing and drying device and air inlet structure of centrifugal fan of condensing and drying device |
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| CN201320428663.4U CN203412818U (en) | 2013-07-18 | 2013-07-18 | Condensing and drying device and air inlet structure of centrifugal fan of condensing and drying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115123A (en) * | 2015-09-10 | 2015-12-02 | 合肥华凌股份有限公司 | Return air inlet of air duct |
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2013
- 2013-07-18 CN CN201320428663.4U patent/CN203412818U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115123A (en) * | 2015-09-10 | 2015-12-02 | 合肥华凌股份有限公司 | Return air inlet of air duct |
| CN105115123B (en) * | 2015-09-10 | 2018-07-31 | 合肥华凌股份有限公司 | A kind of air duct return air inlet |
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