CN209819828U - Air return prevention device and fresh air fan - Google Patents
Air return prevention device and fresh air fan Download PDFInfo
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- CN209819828U CN209819828U CN201821395413.4U CN201821395413U CN209819828U CN 209819828 U CN209819828 U CN 209819828U CN 201821395413 U CN201821395413 U CN 201821395413U CN 209819828 U CN209819828 U CN 209819828U
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Abstract
The utility model discloses an air return prevention device, include: a driving disk is arranged in the inner cavity of the shell; the motor is used for driving the driving disc to rotate; the blades are uniformly and movably arranged on the shell by taking the axis of the driving disc as a center; the driving disc is provided with a plurality of driving grooves matched with the blades, and the blades are provided with a rotating shaft and convex columns matched with the driving grooves; when the driving disc rotates, the driving groove drives the plurality of blades to open or close the air duct. The utility model discloses a prevent return air device drives a plurality of blades through the drive groove of driving-disc under the closure state, rotates along same direction, and then closed ventiduct, and isolated air passes through the casing. In the opening state, the driving grooves of the driving disk drive the blades to rotate in the opposite direction, so that the air duct is completely opened, and the passing volume of air is increased.
Description
Technical Field
The utility model relates to an exhaust window technical field, concretely relates to air return prevention device and new fan.
Background
The fresh air machine is an effective air purification device, can circulate indoor air, on one hand, discharges dirty indoor air outdoors, and on the other hand, inputs outdoor fresh air into the room after measures such as sterilization, disinfection, filtration and the like, so that the air in the room is fresh and clean at every moment.
There are many styles of new fans on the market today. For the fresh air machine which purifies outdoors and indoors simultaneously, the problem that after the fresh air machine is closed, outdoor air can still enter the fresh air machine through the outdoor air inlet and is discharged through the indoor air inlet to pollute the indoor air often exists because the outdoor air inlet is communicated with the indoor air inlet. If in the severe weather of haze, can't block outdoor pollutant and get into indoorly, bring inconvenience for the user, can't satisfy consumer's demand well.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical defect that the outdoor air inlet of above-mentioned new fan can't be closed, the utility model provides an air return prevention device, the device can be the ventiduct in the closing means completely, makes outdoor air can't pass through.
In order to solve the above problem, the utility model discloses realize according to following technical scheme:
an air return prevention device, include:
a driving disk is arranged in the inner cavity of the shell;
the motor is used for driving the driving disc to rotate;
the blades are uniformly and movably arranged on the shell by taking the axis of the driving disc as a center;
the driving disc is provided with a plurality of driving grooves matched with the blades, and the blades are provided with a rotating shaft and convex columns matched with the driving grooves; when the driving disc rotates, the driving groove drives the plurality of blades to open or close the air duct.
Further, the casing includes annular front shroud, backup pad and back shroud, driving disc sets up between backup pad and front shroud, the blade sets up between backup pad and back shroud.
Furthermore, the supporting plate is provided with a plurality of limiting sliding grooves matched with the convex columns, the rotating shaft of each blade is connected with the supporting plate, and the convex columns of the blades penetrate through the supporting plate and are further arranged in the driving grooves.
Furthermore, the driving disc is a circular disc body, and a gear ring is arranged on part of the outer circular edge of the disc body; and a gear matched with the gear ring is sleeved on an output shaft of the motor.
Further, the driving groove is arc-shaped; the driving groove is radially arranged on the driving disc in a surrounding mode by taking the axis of the driving disc as the center.
Furthermore, each blade is provided with two adjacent arc-shaped side walls; when the blades rotate, the arc-shaped side walls between the blades are mutually abutted and matched, so that a closed operation plane is formed, the operation plane is used for closing an air channel, and the air channel is formed by circular through holes respectively formed in the middle parts of the shell and the driving disc.
Furthermore, a first stepped groove is formed in the end face of one arc-shaped side wall of each blade; a second stepped groove matched with the first stepped groove is formed in the end face of the other adjacent arc-shaped side wall;
wherein the first stepped groove of one blade is matched and abutted with the second stepped groove of an adjacent blade; the second stepped slot of that vane matingly abuts the first stepped slot of another adjacent vane.
Further, the number of the blades is 6.
Furthermore, the supporting plate is provided with a raised short pipe; the driving disk is movably sleeved on the short pipe, so that the driving disk can rotate along the axis of the driving disk.
A new fan includes foretell return air prevention device.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a prevent return air device drives a plurality of blades through the drive groove of driving-disc under the closure state, rotates along same direction, and then closed ventiduct, and isolated air passes through the casing. In the opening state, the driving grooves of the driving disk drive the blades to rotate in the opposite direction, so that the air duct is completely opened, and the passing volume of air is increased. A driving disk is directly in driving connection with the blades, so that the structure is simple and compact, the action synchronism of the blades is high, and faults generated when the blades are opened and closed are greatly reduced.
The utility model discloses especially adapted and new fan's supporting use, with this air return prevention device setting in new fan's outdoor air intake department, when air return prevention device closed, make the unable new fan that gets into of outdoor air, keep the room air not receive the pollution. Meanwhile, in the working process of the fresh air machine, the effect of purifying indoor air by the fresh air machine is realized by closing the air return preventing device. When the air return preventing device is opened, the outdoor air and the indoor air are simultaneously filtered, and the air return preventing device is convenient and flexible to use in cooperation with a fresh air machine.
Drawings
The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic perspective view of an air return preventing device of the present invention;
fig. 2 is a schematic view of the blade closure of an air return prevention device of the present invention;
fig. 3 is an exploded view of an anti-return air device according to the present invention;
fig. 4 is a back schematic view of a driving disk and a supporting plate of the air return preventing device of the present invention;
fig. 5 is a schematic view of the blade structure of the air return preventing device of the present invention.
In the figure: 1-shell, 11-front cover plate, 12-support plate, 121-short pipe, 122-circular groove, 123-limit sliding groove, 13-rear cover plate, 2-driving disk, 21-driving groove, 22-gear ring, 3-blade, 31-convex column, 32-rotating shaft, 33-first step groove, 34-second step groove, 4-motor and 5-ventilation channel.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1-5, the air return preventing device of the present invention comprises a housing 1, a plurality of blades 3, a driving plate 2 and a motor 4. The blades 3 and the driving disc 2 are arranged in the inner cavity of the shell 1; the middle parts of the shell 1 and the driving disc 2 are respectively provided with a coaxial circular through hole, so that an air duct 5 penetrating through the shell 1 and the driving disc 2 is formed, and the air duct 5 is a cylindrical through hole. The motor 4 is in driving connection with the driving disc 2, and the motor 4 enables the driving disc 2 to rotate along the axis of the driving disc (namely the axis of the air duct 5). Each blade 3 is provided with a rotating shaft 32 movably connected with the shell 1; the rotation of the driving disk 2 drives the plurality of blades 3 to rotate along the rotating shaft 32, thereby opening and closing the air duct 5.
The housing 1 includes a circular front cover plate 11, a support plate 12, and a rear cover plate 13. Two side faces of the supporting plate 12 are respectively provided with an integrated raised annular edge, and the annular edges of the two side faces are respectively raised along two directions of the axis of the air duct 5; the front cover plate 11 and the rear cover plate 13 are respectively connected with the tops of the annular edges of the two side surfaces. Further, the spaces between the front cover plate 11 and the support plate 12 and between the rear cover plate 13 and the support plate 12 form an inner cavity of the housing 1. The front cover plate 11, the support plate 12 and the rear cover plate 13 are all provided with coaxial circular through holes.
The driving plate 2 is a circular disk-shaped structure and is arranged in a cavity between the front cover plate 11 and the supporting plate 12. The driving disk 2 is provided with a plurality of driving grooves 21 matched with the rotating shafts 32 of the blades 3 on the vertical surface facing the supporting plate 12, and the driving grooves 21 are in an inwards concave arc shape. The driving grooves 21 are radially and uniformly distributed on the vertical surface of the driving disc 2 by taking the axis of the driving disc 2 as the center.
Specifically, a short pipe 121 is integrally provided on the side of the support plate 12 opposite to the front cover plate 11. The driving disc 2 is also in a ring shape, the driving disc 2 is movably sleeved on the short pipe 121, a plurality of accommodating grooves are formed in the driving disc 2 opposite to the short pipe 121, movable steel balls are arranged in the accommodating grooves, and the driving disc 2 can freely rotate through the contact of the steel balls and the outer wall of the short pipe 121.
The blades 3 are in a special triangular shape, wherein each blade 3 is provided with two adjacent arc-shaped side walls. All the blades 3 rotate simultaneously along the rotating shaft 32, and the arc-shaped side walls between the blades 3 are mutually butted and engaged, thereby forming a closed operation plane which is used for closing the ventilating duct 5. The number of blades 3 is preferably 6 in this embodiment.
In this embodiment, preferably, a first step groove 33 is formed on an end surface of an arc-shaped sidewall of each blade 3; and the end surface of the other adjacent arc-shaped side wall is provided with a second step groove 34 matched with the first step groove 33. The first stepped grooves 33 and the second stepped grooves 34 are arranged in an inverted manner, and the first stepped groove 33 of one blade is matched and abutted with the second stepped groove 34 of the adjacent blade; the second step groove 34 of that vane mates against the first step groove 33 of another adjacent vane. Furthermore, when the blade 3 rotates, the two stepped grooves are abutted to each other to achieve the functions of guiding and mutual limiting.
In particular, a number of blades 3 are arranged in a cavity between the back cover plate 13 and the support plate 12. The vertical surface of the supporting plate 12 facing the rear cover plate 13 is provided with a plurality of circular grooves 122 matched with the rotating shafts 32 of the blades 3, the rotating shafts 32 of the blades 3 are movably plugged in the circular grooves 122, and the blades 3 freely rotate along the rotating shafts 32. The blades 3 are further provided with an integrated convex column 31, and the convex column 31 penetrates through the support plate 12 and is plugged in the driving groove 21 of the driving disc 2, so that the driving connection between the driving disc 2 and the blades 3 is realized. Preferably, in this embodiment, the supporting plate 12 is provided with a limiting sliding groove 123 for limiting the movement of the protruding pillar 31, and the limiting sliding groove 123 is arc-shaped and radially arranged on the supporting plate 12 with the axis of the air duct 5 as the center. The convex column 31 passes through the limit sliding groove 123 to be connected with the driving groove 21.
Wherein, the partial outer circle edge of the bottom of the driving disk 2 is provided with a gear ring 22; the motor 4 is fixedly arranged at the bottom of the shell 1, an output shaft of the motor penetrates through the support plate 12, and a gear matched with the gear ring 22 is sleeved at the end part of the output shaft. The rotation of the motor 4 drives a gear, and the driving mode of the gear and the gear ring 22 drives the driving disc 2 to rotate. In the rotating process of the arc-shaped driving groove 21 of the driving disc 2, the groove wall of the driving groove 21 abuts against the convex column 31 of the blade 3, the blade 3 is driven to rotate the closed running plane, and the air duct 5 is further closed. When the motor 4 rotates in the opposite direction, the other slot wall of the driving slot 21 abuts against the convex column 31 of the blade 3, so as to drive the blade 3 to rotate in the opposite direction and reset, and further open the ventilation duct 5.
A new fan includes foretell return air prevention device.
An anti return air device theory of operation be:
the utility model discloses a prevent return air device drives a plurality of blades through the drive groove of driving-disc under the closure state, rotates along same direction, and then closed ventiduct, and isolated air passes through the casing. In the opening state, the driving grooves of the driving disk drive the blades to rotate in the opposite direction, so that the air duct is completely opened, and the passing volume of air is increased. A driving disk is directly in driving connection with the blades, so that the structure is simple and compact, the action synchronism of the blades is high, and faults generated when the blades are opened and closed are greatly reduced.
Other structures of the air return preventing device in the embodiment are shown in the prior art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.
Claims (10)
1. An air return prevention device, comprising:
a driving disk is arranged in the inner cavity of the shell;
the motor is used for driving the driving disc to rotate;
the blades are uniformly and movably arranged on the shell by taking the axis of the driving disc as a center;
the driving disc is provided with a plurality of driving grooves matched with the blades, and the blades are provided with a rotating shaft and convex columns matched with the driving grooves; when the driving disc rotates, the driving groove drives the plurality of blades to open or close the air duct.
2. The air return prevention device of claim 1, wherein: the casing includes annular front shroud, backup pad and back shroud, driving-disc setting is between backup pad and front shroud, the blade setting is between backup pad and back shroud.
3. The air return prevention device of claim 2, wherein:
the supporting plate is provided with a plurality of limiting sliding grooves matched with the convex columns, the rotating shaft of each blade is connected with the supporting plate, and the convex columns of the blades penetrate through the supporting plate and are further arranged in the driving grooves.
4. The air return prevention device of claim 1, wherein:
the driving disc is a circular disc body, and a gear ring is arranged on part of the outer circular edge of the disc body; and a gear matched with the gear ring is sleeved on an output shaft of the motor.
5. The air return prevention device of claim 1, wherein:
the driving groove is arc-shaped; the driving groove is radially arranged on the driving disc in a surrounding mode by taking the axis of the driving disc as the center.
6. The air return prevention device of claim 1, wherein:
each blade is provided with two adjacent arc-shaped side walls;
when the blades rotate, the arc-shaped side walls between the blades are mutually abutted and matched, so that a closed operation plane is formed, the operation plane is used for closing an air channel, and the air channel is formed by circular through holes respectively formed in the middle parts of the shell and the driving disc.
7. The air return prevention device of claim 6, wherein:
a first stepped groove is formed in the end face of one arc-shaped side wall of each blade; a second stepped groove matched with the first stepped groove is formed in the end face of the other adjacent arc-shaped side wall;
wherein the first stepped groove of one blade is matched and abutted with the second stepped groove of an adjacent blade; the second stepped slot of that vane matingly abuts the first stepped slot of another adjacent vane.
8. The air return prevention device of claim 7, wherein: the number of the blades is 6.
9. The air return prevention device of claim 2, wherein:
the supporting plate is provided with a raised short pipe;
the driving disk is movably sleeved on the short pipe, so that the driving disk can rotate along the axis of the driving disk.
10. A new fan comprising the air return preventing device of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821395413.4U CN209819828U (en) | 2018-08-28 | 2018-08-28 | Air return prevention device and fresh air fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821395413.4U CN209819828U (en) | 2018-08-28 | 2018-08-28 | Air return prevention device and fresh air fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209819828U true CN209819828U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821395413.4U Active CN209819828U (en) | 2018-08-28 | 2018-08-28 | Air return prevention device and fresh air fan |
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| Country | Link |
|---|---|
| CN (1) | CN209819828U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556287A (en) * | 2020-12-10 | 2021-03-26 | 珠海格力电器股份有限公司 | Partition device, refrigerator and defrosting method |
-
2018
- 2018-08-28 CN CN201821395413.4U patent/CN209819828U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556287A (en) * | 2020-12-10 | 2021-03-26 | 珠海格力电器股份有限公司 | Partition device, refrigerator and defrosting method |
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