CN203627271U - Axial flow roof fan with clockwise and counterclockwise rotating blades - Google Patents
Axial flow roof fan with clockwise and counterclockwise rotating blades Download PDFInfo
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- CN203627271U CN203627271U CN201320719084.5U CN201320719084U CN203627271U CN 203627271 U CN203627271 U CN 203627271U CN 201320719084 U CN201320719084 U CN 201320719084U CN 203627271 U CN203627271 U CN 203627271U
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Abstract
The utility model discloses an axial flow roof fan with clockwise and counterclockwise rotating blades. The axial flow roof fan comprises a hood, a cylinder, a base and a motor, wherein the bottom end of the cylinder is directly formed on the base; the top end face of the cylinder is fixed on a support plate; the motor is fixed on the upper plane of the middlet of the support plate; the output shaft of the motor penetrates through the support plate downwards; an inserting hole is formed in the center of the bottom end of the output shaft of the motor; the upper end of a connecting shaft is clamped in the inserting hole in an interference fit manner; an upper annular convex side formed on the outer wall of the connecting shaft is fixedly connected with the bottom end of the output shaft through bolts; impellers are inserted and clamped at the lower end of the connecting shaft in the interference fit manner; the tail ends of the bolts on the impellers are inserted into positioning holes in lower annular convex sides formed on the outer wall of the middle part of the connecting shaft, and are screwed with fixing screw nuts; the fixing screw nuts are pressed on the upper plane of the lower annular convex side. As the impellers are fixed through the lower annular convex side on the connecting shaft, the impellers are prevented from being loosened when the rotating shaft of the motor rotates clockwise and counterclockwise, and normal operation of the fan is ensured.
Description
Technical field:
The utility model relates to ventilation equipment technical field, relates in particular a kind of axial flow roof ventilator with clockwise and anticlockwise blade.
Background technique:
Roof ventilator has a variety of, there is also having of axial flow centrifugal, the impeller of existing roof ventilator is generally equal can only adopt a kind of rotation mode, be forward or send out turn, thereby to carrying out within doors air draught or blowing, but it all can only carry out a kind of mode, although it is conventional technology that existing motor can be realized rotating and reverse of motor by control circuit, but in roof ventilator, what adopt that thereby rotating and reverse of control circuit control motor realize impeller rotates and reverse to realize air draught and the blowing within doors, it is subject to many impacts of structure, its shortcoming is, because the blade of the axial flow fan vane wheel on existing roof is to be generally molded directly within on wheel hub or by bolt or other modes to be fixed on wheel hub, the angle of its blade cannot regulate, also just cannot regulate air quantity by the rotation of blade, simultaneously, when the shape of its blade is to design according to the mode of impeller forward and air quantity, make the asymmetric shape of being shaped as of blade, like this in the time that impeller reverses, the effect of its generation and original effect are just different, even can damaged blade.
And existing impeller is generally to connect sleeve on machine shaft by key, thereby and the locking nut that is spirally connected on the top of machine shaft is fixed in the above impeller, but in the time of its machine shaft reversion, will make locking nut come loose from rotating shaft drop (principle is the same with the principle of locking direction with emery wheel rotation), make impeller drop and cause accident from rotating shaft, therefore common locking nut cannot be as the device of locking in can the roof ventilator of clockwise and anticlockwise, and this type of common structure also cannot use in clockwise and anticlockwise blower fan.
Between the blast cap of existing roof ventilator and air duct, there is larger space, easily allow birds fly into, an anti-bird isolation net is set on the air duct top of its roof ventilator or anti-bird isolation net is set between air duct and blast cap in order to prevent that birds and other foreign material from entering, and it just protects outside, roof, it but cannot protect inner foreign material, will make to affect it indoor foreign material suction blower fan and normally move when particularly it is from indoor air draught in the time that roof ventilator adopts clockwise and anticlockwise mode.
And its structure of the blast cap of existing roof ventilator is a cap shape, wind during from indoor drinking up the end face by blast cap stop for the first time the wind direction that blows out that changes wind, make wind direction mobile around, and wind is blown out by stopping for the second time of shade downwards along shade, stop through secondary, greatly reduce exhaust air rate, affected effect.
And the motor of existing roof ventilator be generally without cover, just stop by blast cap, it still can make some foreign material of outside, roof be attached to outside motor affects the radiating effect of motor.
Model utility content:
The purpose of this utility model is exactly the deficiency for prior art, and provide a kind of axial flow roof ventilator with clockwise and anticlockwise blade, it is fixed impeller by the lower annular protrusion limit on coupling shaft, it all can not make impeller loosening in the time of machine shaft clockwise and anticlockwise, guarantee the normal operation of blower fan, meanwhile, the top of its blast cap is circular dull and stereotyped, guarantee that air draft and air draught all only need to change wind direction one time, improve the effect of its air draft and air draught.
Technology solution of the present utility model is as follows:
A kind of axial flow roof ventilator with clockwise and anticlockwise blade, comprise blast cap, air duct, base and motor, the bottom of air duct is molded directly within on base, the top end of described air duct is fixed in dunnage, on the middle part of dunnage, plane is fixed with motor, the output shaft of motor is downward through dunnage, the center of its bottom forms spliced eye, the upper end of coupling shaft is by interference fit holding in spliced eye, and the upper annular lug that the outer wall of coupling shaft forms is bolted to connection on the bottom of output shaft; Impeller sleeve interference fit holding are in the lower end of coupling shaft, in the positioning hole on the lower annular protrusion limit that the tail end sleeve of the adjusting bolt on impeller forms on the outer wall of the middle part of coupling shaft and be bolted with set screw nut, set screw nut is pressed against the upper plane on lower annular protrusion limit;
On the middle part of dunnage, plane is fixed with protection cover body, and motor, in protection cover body, forms multiple vents on the sidewall of protection cover body, forms multiple vent holes in dunnage.
Described blast cap is made up of circular flat board and multiple supporting post, and the upper end of supporting post is fixed on circular dull and stereotyped bottom surface upper and lower end and is fixed in the limit portion of upper plane of dunnage, and circular dull and stereotyped limit portion forms multiple connecting through holes.
The top of described air duct is fixed with isolation net, and upper isolation net is close to the back side of dunnage.
Described base is fixed on house pedestal, and the sidewall of base is outward extended with annular protrusion limit, and the limit portion of the upper plane on annular protrusion limit is welded with annular retaining ring, and circular dull and stereotyped diameter is greater than the distance between two relative outer side walls of base.
The limit portion of described dunnage is provided with rain retaining cover, rain retaining cover is formed to the annular weather shield of downward-extension and is formed by the limit portion of weather shield and weather shield, weather shield is bolted to connection in the portion of the limit of dunnage, the bottom outer wall of annular weather shield is close to the madial wall of annular retaining ring, the limit portion of weather shield forms the connecting through hole fixed via one to one forming with circular dull and stereotyped limit portion, and vent hole is around motor.
On described pedestal, be fixed with lower isolation net.
Described impeller comprises blade, the mounting disc of lobus sinister sheet and the mounting disc of lobus dexter sheet, the underpart outer wall of coupling shaft forms spacing rib, the lower end of coupling shaft successively sleeve interference fit holding in the center hole of the mounting disc of lobus sinister sheet and the mounting disc of lobus dexter sheet, the mounting disc of lobus sinister sheet is pressed against on spacing rib, the top end of the lower end of coupling shaft is bolted with block, the mounting disc of described lobus sinister sheet and the mounting disc of lobus dexter sheet form respectively that left gulde edge is accommodated nest and right gulde edge is accommodated nest, on the petiole end of blade, form axially locating limit, this gulde edge is clamped in that left gulde edge is accommodated nest and right gulde edge is accommodated between nest, described right gulde edge is accommodated on the bottom surface of nest and is formed some wedge grooves, on described gulde edge, form wedge lug, wedge lug sleeve is in wedge groove, multiple adjusting bolts are through the mounting disc of lobus sinister sheet and the mounting disc of lobus dexter sheet, it is bolted with adjusting nut, the mounting disc of lobus sinister sheet and the mounting disc of lobus dexter sheet are clamped between adjusting nut and the head of adjusting bolt, multiple adjusting bolts are lined up two annular concentric circles centered by the longitudinal center line of the mounting disc of lobus sinister sheet or the mounting disc of lobus dexter sheet, the tail end of the adjusting nut of its inner ring is through the positioning hole on lower annular protrusion limit, and be bolted with set screw nut.
Described motor is realized by control circuit, and control circuit comprises to be controlled the contactor KM1 of motor forward and control contactor KM2, the major loop air-break switch circuit breaker Q S1 of motor reversal, multiple major loop fus, multiple control loop fus, control loop circuit breaker Q S2, multiple control knob, thermorelay FR composition.
Described blade is airfoil blade, and it is centered by the longitudinal center line of the petiole of blade, and the dual-side of blade is symmetrical.
The beneficial effects of the utility model are:
1, it is fixed impeller by the lower annular protrusion limit on coupling shaft, it all can not make impeller loosening in the time of machine shaft clockwise and anticlockwise, guarantee the normal operation of blower fan, simultaneously, the top of its blast cap is circular dull and stereotyped, guarantee that air draft and air draught all only need to change wind direction one time, improve the effect of its air draft and air draught.
2, its blade is airfoil blade, and it is centered by the longitudinal center line of the petiole of blade, and the dual-side of blade is symmetrical, and while guaranteeing like this impeller clockwise and anticlockwise, its air force is identical, guarantees that the effect of air draught and air draft is the same.
3, its motor is fixed with protection cover body outward, to protect the outer wall of motor can not adhere to foreign material and affect its heat radiation.
4, its upper isolation net and lower isolation net double protection, guarantees the normal operation of blower fan.
5, the blade of its impeller can carry out angular adjustment and regulate the air quantity of blower fan, and it regulates simple, without mechanisms such as specific controlling mechanism or other volume control dampers, reduces costs.
Accompanying drawing explanation:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of another kind of state of the present utility model;
Fig. 3 is the side view of the mounting disc of lobus sinister sheet, the mounting disc of lobus dexter sheet and main shaft;
Fig. 4 is the structural representation of blades installation in the mounting disc of lobus sinister sheet and the mounting disc of lobus dexter sheet;
Fig. 5 is the partial structurtes schematic diagram of lobus sinister sheet of the present utility model mounting disc and the mounting disc of lobus dexter sheet;
Fig. 6 is the structural representation of coupling shaft of the present utility model.
Fig. 7 is the control circuit of the utility model motor;
Fig. 8 is the structural representation of dunnage and supporting post;
Fig. 9 is the partial enlarged drawing of Fig. 2.
Embodiment:
Embodiment: see shown in Fig. 1 to 9, a kind of axial flow roof ventilator with clockwise and anticlockwise blade, comprise blast cap 1, air duct 2, base 3 and motor 4, the bottom of air duct 2 is molded directly within on base 3, the top end of described air duct 2 is fixed in dunnage 5, on the middle part of dunnage 5, plane is fixed with motor 4, the output shaft 41 of motor 4 is downward through dunnage 5, the center of its bottom forms spliced eye 42, interference fit holding is passed through in spliced eye 42 in the upper end of coupling shaft 7, the upper annular lug 71 that the outer wall of coupling shaft 7 forms is bolted to connection on the bottom of output shaft 41, impeller 6 sleeves interference fit holding are in the lower end of coupling shaft 7, in the positioning hole on the lower annular protrusion limit 72 that the tail end sleeve of the adjusting bolt 61 on impeller 6 forms on the outer wall of the middle part of coupling shaft 7 and be bolted with set screw nut 8, set screw nut 8 is pressed against the upper plane on lower annular protrusion limit 72, by adjusting bolt 61 and set screw nut 8, impeller 6 is fixed on and on coupling shaft 7, has guaranteed the output shaft 41 of motor 4 no matter be that forward or reversion all can not make impeller 6 come off from coupling shaft 41, simultaneously, impeller 6 sleeves interference fit holding be in the lower end of coupling shaft 7, further guarantee between impeller 6 and coupling shaft 7 be connected fastening.
On the middle part of dunnage 5, plane is fixed with protection cover body 9, and motor 4, in protection cover body 9, forms multiple vents 91 on the sidewall of protection cover body 9, forms multiple vent holes 51 in dunnage 5.
Described blast cap 1 is made up of circular flat board 11 and multiple supporting post 12, and the upper end of supporting post 12 is fixed on circular dull and stereotyped 11 bottom surface upper and lower end and is fixed in the limit portion of upper plane of dunnage 5, and circular dull and stereotyped 11 limit portion forms multiple connecting through holes 111.
The top of described air duct 2 is fixed with isolation net 21, and upper isolation net 21 is close to the back side of dunnage 5.
Described base 3 is fixed on house pedestal 10, the sidewall of base 3 is outward extended with annular protrusion limit 31, the limit portion of the upper plane on annular protrusion limit 31 is welded with annular retaining ring 32, and circular dull and stereotyped 11 diameter is greater than the distance between two relative outer side walls of base 3.
The limit portion of described dunnage 5 is provided with rain retaining cover 52, rain retaining cover 52 is formed to the annular weather shield 522 of downward-extension and is formed by the limit portion of weather shield 521 and weather shield 521, weather shield 521 is bolted to connection in the portion of the limit of dunnage 5, the bottom outer wall of annular weather shield 522 is close to the madial wall of annular retaining ring 32, the limit portion of weather shield 521 forms connecting through hole 111 fixed via 523 one to one forming with circular dull and stereotyped 11 limit portion, vent hole 51 is fan shaped borehole, and all vent holes 51 are distributed on around motor 4.
On described pedestal 10, be fixed with lower isolation net 20.
Described impeller 6 comprises blade 62, lobus sinister sheet mounting disc 63 and lobus dexter sheet mounting disc 64, the underpart outer wall of coupling shaft 7 forms spacing rib 73, the lower end of coupling shaft 7 successively sleeve interference fit holding in the center hole of lobus sinister sheet mounting disc 63 and lobus dexter sheet mounting disc 64, lobus sinister sheet mounting disc 63 is pressed against on spacing rib 73, the top end of the lower end of coupling shaft 7 is bolted with block 30, described lobus sinister sheet mounting disc 63 and lobus dexter sheet mounting disc 64 form respectively that left gulde edge is accommodated nest 631 and right gulde edge is accommodated nest 641, on the petiole end of blade 62, form axially locating limit 621, this gulde edge 621 is clamped in that left gulde edge is accommodated nest 631 and right gulde edge is accommodated between nest 641, described right gulde edge is accommodated on the bottom surface of nest 641 and is formed some wedge grooves 6411, on described gulde edge 621, form wedge lug 6211, wedge lug 6211 sleeves are in wedge groove 6411, multiple adjusting bolts 61 are through lobus sinister sheet mounting disc 63 and lobus dexter sheet mounting disc 64, it is bolted with adjusting nut 40, lobus sinister sheet mounting disc 63 and lobus dexter sheet mounting disc 64 are clamped between adjusting nut 40 and the head of adjusting bolt 61, multiple adjusting bolts 61 are lined up two annular concentric circles centered by the longitudinal center line of lobus sinister sheet mounting disc 63 or lobus dexter sheet mounting disc 64, the tail end of the adjusting nut 40 of its inner ring is through the positioning hole on lower annular protrusion limit 72, and be bolted with set screw nut 8.
Described motor 4 is realized by control circuit, and control circuit comprises to be controlled the contactor KM1 of motor 4 forwards and control contactor KM2, major loop air-break switch circuit breaker Q S1, multiple major loop fus (in figure, FU1-3 represents), multiple control loop fus (in figure, FU4-5 represents), control loop circuit breaker Q S2, multiple control knob (start button SB2, the stop button SB1, the start button SB3 that show in figure), the thermorelay FR composition that motor 4 reverses.
Described blade 62 is airfoil blade, and it is centered by the longitudinal center line of the petiole of blade 62, and the dual-side of blade is symmetrical.
As shown in Figure 1, when fine, the weather shield of rain retaining cover 52 521 is bolted to connection in the portion of the limit of dunnage 5, and indoor like this wind is discharged by the effect of impeller 6, and changing wind direction through once stopping of circular flat board 11 can discharge, its discharge capacity is large, efficiency is high, and in the time that weather rains, as shown in Figure 2, in order to improve the effect of keeping off the rain, can will be bolted on circular dull and stereotyped 11 and improve the effect of keeping off the rain when the weather shield 521 of canopy 52.
And the heat of motor 4 can be discharged by the multiple vents 91 that form on the sidewall of protection cover body 9, improve the effect of its cooling.
The utility model is in regulating air volume, only need to regulate blade 62 of the present utility model, first unclamp adjusting nut 40 and set screw nut 8, then unclamp adjusting bolt 61, then mention blade 62, wedge lug 6211 is extracted from wedge groove 6411, again blade 62 is rotated to angle (the adjustment angle of blade 62 is 10～30 degree) definitely, be rotated in place after by wedge lug 6211 again sleeve at wedge groove 6411, after adjusting completes, tighten adjusting nut 40 and set screw nut 8, complete adjusting.
The positive and reverse rotation control circuit figure of this motor 4 as shown in Figure 8, its principle and existing homogeneous phase are on the market all: when pressing after forward start button SB2, the communicate dynamic circuit breaker contact, the normally opened contact of forward start button SB2, normally closed auxiliary contact, the forward ac contactor coil KM1 of reversion A.C. contactor KM2 of dynamic circuit breaker contact, stop button SB1 of overtemperature relay FR of power supply, make positive contactor KM1 charged and move, its main contact closure makes the operation of motor forward rotation, and moves by the auxiliary contact self-sustaining of often opening of contactor KM1.When reversion starts, press start button SB3, its process, to similar above, just, after contactor KM2 action, exchanged two power line U, W phase (changing power phase), thereby has been reached reversion object.
Interlocking principle: the main contact of contactor KM1 and KM2 never allows simultaneously closed, otherwise causes two-phase power supply short circuit accident.When guaranteeing a contactor energized action, another contactor can not energized action, to avoid the phase fault of power supply, just in forward control circuit, be connected in series the normally closed auxiliary contact of reversion contactor KM2, and in reverse turn control circuit, be connected in series the normally closed auxiliary contact of positive contactor KM1.In the time of contactor KM1 energized action, the normally closed interlock disjunction of the KM1 of string in reverse turn control circuit, has cut off reverse turn control circuit, and while having guaranteed that KM1 main contact is closed, the main contact of KM2 can not be closed.Equally, in the time of contactor KM2 energized action, the normally closed interlock disjunction of KM2, has cut off forward control circuit, has avoided reliably the generation of two-phase power supply short circuit accident.This in the time of a contactor energized action, make effect that another contactor can not energized action interlocking (or interlocking) by its normally closed auxiliary contact.The normally closed interlock of realizing interlocking effect is called locking contact (or interlocking contact).
Clearer in order to illustrate in Figure of description of the present utility model, the bolt and nut in Local map has carried out omitting expression.
Claims (9)
1. one kind has the axial flow roof ventilator of clockwise and anticlockwise blade, comprise blast cap (1), air duct (2), base (3) and motor (4), the bottom of air duct (2) is molded directly within on base (3), it is characterized in that: the top end of described air duct (2) is fixed in dunnage (5), on the middle part of dunnage (5), plane is fixed with motor (4), the output shaft (41) of motor (4) is downward through dunnage (5), the center of its bottom forms spliced eye (42), interference fit holding is passed through in spliced eye (42) in the upper end of coupling shaft (7), the upper annular lug (71) that the outer wall of coupling shaft (7) forms is bolted to connection on the bottom of output shaft (41), impeller (6) sleeve interference fit holding are in the lower end of coupling shaft (7), in the positioning hole on the lower annular protrusion limit (72) that the tail end sleeve of the adjusting bolt (61) on impeller (6) forms on the middle part outer wall of coupling shaft (7) and be bolted with set screw nut (8), set screw nut (8) is pressed against the upper plane on lower annular protrusion limit (72),
On the middle part of dunnage (5), plane is fixed with protection cover body (9), and motor (4), in protection cover body (9), forms multiple vents (91) on the sidewall of protection cover body (9), forms multiple vent holes (51) in dunnage (5).
2. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 1, it is characterized in that: described blast cap (1) is made up of circular dull and stereotyped (11) and multiple supporting post (12), the bottom surface upper and lower end that the upper end of supporting post (12) is fixed on circular dull and stereotyped (11) is fixed in the limit portion of upper plane of dunnage (5), and the limit portion of circular dull and stereotyped (11) forms multiple connecting through holes (111).
3. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 1, is characterized in that: the top of described air duct (2) is fixed with isolation net (21), and upper isolation net (21) is close to the back side of dunnage (5).
4. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 2, it is characterized in that: described base (3) is fixed on house pedestal (10), the sidewall of base (3) is outward extended with annular protrusion limit (31), the limit portion of the upper plane on annular protrusion limit (31) is welded with annular retaining ring (32), and the diameter of circular dull and stereotyped (11) is greater than the distance between two relative outer side walls of base (3).
5. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 4, it is characterized in that: the limit portion of described dunnage (5) is provided with rain retaining cover (52), rain retaining cover (52) is formed to the annular weather shield (522) of downward-extension and is formed by the limit portion of weather shield (521) and weather shield (521), weather shield (521) is bolted to connection in the limit portion of dunnage (5), the bottom outer wall of annular weather shield (522) is close to the madial wall of annular retaining ring (32), the limit portion of weather shield (521) forms connecting through hole (111) fixed via (523) one to one forming with the limit portion of circular dull and stereotyped (11), vent hole (51) is around motor (4).
6. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 4, is characterized in that: on described pedestal (10), be fixed with lower isolation net (20).
7. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 1, it is characterized in that: described impeller (6) comprises blade (62), lobus sinister sheet mounting disc (63) and lobus dexter sheet mounting disc (64), the underpart outer wall of coupling shaft (7) forms spacing rib (73), the lower end of coupling shaft (7) successively sleeve interference fit holding in the center hole of lobus sinister sheet mounting disc (63) and lobus dexter sheet mounting disc (64), lobus sinister sheet mounting disc (63) is pressed against on spacing rib (73), the top end of the lower end of coupling shaft (7) is bolted with block (30), described lobus sinister sheet mounting disc (63) and lobus dexter sheet mounting disc (64) form respectively that left gulde edge is accommodated nest (631) and right gulde edge is accommodated nest (641), on the petiole end of blade (62), form axially locating limit (621), this gulde edge (621) is clamped in that left gulde edge is accommodated nest (631) and right gulde edge is accommodated between nest (641), described right gulde edge is accommodated on the bottom surface of nest (641) and is formed some wedge grooves (6411), on described gulde edge (621), form wedge lug (6211), wedge lug (6211) sleeve is in wedge groove (6411), multiple adjusting bolts (61) are through lobus sinister sheet mounting disc (63) and lobus dexter sheet mounting disc (64), it is bolted with adjusting nut (40), lobus sinister sheet mounting disc (63) and lobus dexter sheet mounting disc (64) are clamped between adjusting nut (40) and the head of adjusting bolt (61), multiple adjusting bolts (61) are lined up two annular concentric circles centered by the longitudinal center line of lobus sinister sheet mounting disc (63) or lobus dexter sheet mounting disc (64), the tail end of the adjusting nut (40) of its inner ring is through the positioning hole on lower annular protrusion limit (72), and be bolted with set screw nut (8).
8. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 1, it is characterized in that: described motor (4) is realized by control circuit, control circuit comprises the contactor KM1 that controls motor (4) forward and contactor KM2, major loop air-break switch circuit breaker Q S1, multiple major loop fus, multiple control loop fus, control loop circuit breaker Q S2, multiple control knob, the thermorelay FR that controls motor (4) reversion.
9. a kind of axial flow roof ventilator with clockwise and anticlockwise blade according to claim 1, is characterized in that: described blade (62) is airfoil blade, and it is centered by the longitudinal center line of the petiole of blade (62), and the dual-side of blade is symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320719084.5U CN203627271U (en) | 2013-11-14 | 2013-11-14 | Axial flow roof fan with clockwise and counterclockwise rotating blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320719084.5U CN203627271U (en) | 2013-11-14 | 2013-11-14 | Axial flow roof fan with clockwise and counterclockwise rotating blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627271U true CN203627271U (en) | 2014-06-04 |
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ID=50813754
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320719084.5U Expired - Fee Related CN203627271U (en) | 2013-11-14 | 2013-11-14 | Axial flow roof fan with clockwise and counterclockwise rotating blades |
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| Country | Link |
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| CN (1) | CN203627271U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989674A (en) * | 2015-06-30 | 2015-10-21 | 德清恒鑫电子有限公司 | Fan housing and manufacturing method thereof |
| CN108691561A (en) * | 2018-05-14 | 2018-10-23 | 兖州煤业股份有限公司 | Axial flow blower trining mock up |
-
2013
- 2013-11-14 CN CN201320719084.5U patent/CN203627271U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989674A (en) * | 2015-06-30 | 2015-10-21 | 德清恒鑫电子有限公司 | Fan housing and manufacturing method thereof |
| CN108691561A (en) * | 2018-05-14 | 2018-10-23 | 兖州煤业股份有限公司 | Axial flow blower trining mock up |
| CN108691561B (en) * | 2018-05-14 | 2020-02-14 | 兖州煤业股份有限公司 | Axial fan training model |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20181114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |