CN112814928B - Independent cooling type fire-fighting smoke exhaust fan - Google Patents
Independent cooling type fire-fighting smoke exhaust fan Download PDFInfo
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- CN112814928B CN112814928B CN202110016582.2A CN202110016582A CN112814928B CN 112814928 B CN112814928 B CN 112814928B CN 202110016582 A CN202110016582 A CN 202110016582A CN 112814928 B CN112814928 B CN 112814928B
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- blade
- cooling
- smoke exhaust
- exhaust fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an independent cooling type fire-fighting smoke exhaust fan which comprises a smoke exhaust fan shell, a driving assembly and a blade assembly, wherein the driving assembly is arranged in the smoke exhaust fan shell, the blade assembly is arranged on the driving assembly, a suspension ring seat is arranged above the smoke exhaust fan shell, a driving motor fixing frame is arranged on the inner bottom wall of the smoke exhaust fan shell, the driving assembly comprises a motor and a cooling device, the cooling device is arranged on the driving motor fixing frame of the smoke exhaust fan shell, and the motor is arranged in the cooling device. The invention relates to the technical field of fire fighting equipment, which reduces the resistance of a hot air channel, reduces the air resistance of the hot air channel, increases the rated ventilation quantity, adopts an independent cooling structure for a motor, ensures that the temperature rise of the motor is controllable, and eliminates more smoke in a shorter time during smoke exhaust work, thereby providing favorable escape conditions for trapped people and being beneficial to improving the working efficiency of fire fighters.
Description
Technical Field
The invention relates to the technical field of fire-fighting equipment, in particular to an independent cooling type fire-fighting smoke exhaust fan.
Background
The fire-fighting fan is a fire-fighting smoke exhaust machine which is widely applied, when a fire disaster occurs, the fire-fighting fan can timely exhaust indoor dense smoke to the outdoor, favorable conditions can be created for evacuation and evacuation of indoor trapped personnel, favorable conditions are created for rescue of fire fighters, the fire-fighting rescue difficulty is reduced, the work efficiency of the fire fighters is improved, and loss caused by the fire disaster is reduced.
Fire control smoke exhaust fan is very high at smoke exhaust in-process operating temperature, if there is not good heat dissipation of motor in the course of the work, it is inefficacious because of high temperature very easily, and smoke exhaust fan mostly works through connecting external power supply, the external connection circuit damages easily in high temperature environment, lead to smoke exhaust fan out of work, influence fire control smoke exhaust operation, the inside motor protection barrel structure that usually adopts of current fire control smoke exhaust fan, although can alleviate the problem of motor temperature rise to a certain extent, but motor protection barrel structure has taken great hot-blast channel, make hot-blast channel air resistance increase, it becomes poor to air exhaust the effect.
Disclosure of Invention
In order to overcome the technical defects at present, the invention provides the independent cooling type fire-fighting smoke exhaust fan, the resistance of a hot air channel is reduced, the air resistance of the hot air channel is reduced, the rated ventilation volume is increased, the motor adopts an independent cooling type structure, the temperature rise of the motor is controllable, and during smoke exhaust work, more smoke is exhausted in a shorter time, so that favorable escape conditions are provided for trapped people, and the improvement of the working efficiency of fire-fighting personnel is facilitated.
The technical scheme of the invention is as follows: an independent cooling type fire-fighting smoke exhaust fan comprises a smoke exhaust fan shell, a driving assembly and a blade assembly, wherein the driving assembly is arranged inside the smoke exhaust fan shell, the blade assembly is arranged on the driving assembly, the smoke exhaust fan shell is of a cylindrical structure with openings at two ends, a machine foot plate is arranged below the smoke exhaust fan shell, a suspension ring seat is arranged above the smoke exhaust fan shell, a driving motor fixing frame is arranged on the inner bottom wall of the smoke exhaust fan shell, the driving assembly comprises a motor and a cooling device, the cooling device is arranged on the driving motor fixing frame of the smoke exhaust fan shell, the motor is arranged inside the cooling device, the motor is provided with a front motor shaft and a rear motor shaft, the front motor shaft and the rear motor shaft are rotatably arranged on the cooling device, the front motor shaft penetrates through the front end of the cooling device and extends out of the cooling device from the front end of the cooling device, the rear motor shaft penetrates through the rear end of the cooling device, the cooling device comprises a cooling air cavity, a primary cooling box shell, a secondary cooling box shell, a front primary pressurizing blade chamber and a rear pressurizing blade chamber, the secondary pressurizing blade chamber is arranged on the secondary pressurizing chamber, the secondary pressurizing blade chamber is arranged in the primary cooling box shell, and a primary cooling box cooling channel is formed between the primary cooling box shell, and the secondary blade chamber, the cooling air cavity is arranged inside a shell of the primary cooling box, the cooling air cavity is arranged at the rear end of the motor, the cooling air cavity is arranged at the front end of the front blade chamber, the rear primary pressurizing blade chamber is arranged at the rear end of the shell of the secondary cooling box, the rear motor shaft penetrates through the rear primary pressurizing blade chamber, the rear primary pressurizing blade is arranged on the rear motor shaft, the rear primary pressurizing blade is positioned in the rear primary pressurizing blade chamber space, the rear primary pressurizing blade chamber is communicated with the secondary cooling channel, the rear secondary pressurizing blade chamber is arranged at the rear end of the rear primary pressurizing blade chamber, the rear motor shaft penetrates through the rear secondary pressurizing blade chamber, the rear secondary pressurizing blade chamber is arranged on the rear motor shaft, the rear secondary pressurizing blade chamber is provided with a backheating prevention baffle plate, the front motor shaft rotates to be arranged at the front end of the shell of the primary cooling box, the front motor shaft penetrates through the front end of the shell of the primary cooling box and extends from the front end of the shell of the primary cooling box to the rear end of the motor, the front end of the primary cooling blade chamber, the motor shaft and the front blade chamber and the hub blade hub assembly is distributed on the motor shaft.
Furthermore, a primary air vent is arranged at the front end of the shell of the primary cooling box, and the primary air vent is communicated with the primary cooling channel and the secondary cooling channel.
Furthermore, a disturbing sheet is arranged on a front motor shaft of the motor and provided with a plurality of groups, and the disturbing sheet stirs cooling air to ensure that the cooling air and the front motor shaft exchange heat fully.
Furthermore, an air seal is arranged at the front end of the shell of the primary cooling box, the front motor shaft penetrates through the air seal, and the front motor shaft is rotatably arranged on the air seal.
Furthermore, the secondary cooling box shell and the outer wall of the rear primary pressurizing blade chamber are provided with heat insulation cotton, so that the secondary cooling box shell is prevented from being heated too quickly by hot air, and the temperature of the primary cooling box shell connected with the secondary cooling box shell is prevented from rising too quickly.
Furthermore, heat insulation cotton is arranged between the heat return prevention baffle and the rear secondary pressurizing blade chamber.
The invention has the following beneficial effects: the invention relates to an independent cooling type fire-fighting smoke exhaust fan, which reduces the resistance of a hot air channel, reduces the air resistance of the hot air channel, increases the rated ventilation volume, adopts an independent cooling type structure for a motor, ensures that the temperature rise of the motor is controllable, eliminates more smoke in a shorter time during smoke exhaust work, provides favorable escape conditions for trapped people, and is beneficial to improving the working efficiency of fire fighters.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:
FIG. 1 is a cross-sectional structural view of an independently cooled fire-fighting smoke exhaust fan according to the present invention;
fig. 2 is a left side view of an independently cooled fire protection and smoke exhaust fan according to the present invention.
Wherein, 1, a smoke exhaust fan shell, 2, a machine foot plate, 3, a suspension ring seat, 4, a driving motor fixing frame, 5, a motor, 6, a front motor shaft, 7, a rear motor shaft, 8, a cold air cavity, 9, a primary cooling box shell, 10, a secondary cooling box shell, 11, a prepositive cooling blade, 12, a postpositive primary pressurizing blade, 13, a rear secondary pressurizing blade, 14, a front blade chamber, 15, a rear primary pressurizing blade chamber, 16, a rear secondary pressurizing blade chamber, 17, a tail end cooling outlet, 18, a heat return prevention baffle, 19, a main blade, 20, a blade hub, 21, a primary vent, 22, a disturbance blade, 23 and an air seal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1-2, the technical solution adopted by the present invention is as follows: an independent cooling type fire-fighting smoke exhaust fan comprises a smoke exhaust fan shell 1, a driving assembly and a blade assembly, wherein the driving assembly is arranged inside the smoke exhaust fan shell 1, the blade assembly is arranged on the driving assembly, the smoke exhaust fan shell 1 is of a cylindrical structure with two open ends, a foot plate 2 is arranged below the smoke exhaust fan shell 1, a suspension ring seat 3 is arranged above the smoke exhaust fan shell 1, a driving motor fixing frame 4 is arranged on the inner bottom wall of the smoke exhaust fan shell 1, the driving assembly comprises a motor 5 and a cooling device, the cooling device is arranged on the driving motor fixing frame 4 of the smoke exhaust fan shell 1, the motor 5 is arranged inside the cooling device, the motor 5 is provided with a front motor shaft 6 and a rear motor shaft 7, the front motor shaft 6 and the rear motor shaft 7 are rotatably arranged on the cooling device, the front motor shaft 6 penetrates through the front end of the cooling device and extends out of the cooling device from the front end of the cooling device, the rear motor shaft 7 penetrates through the rear end of the cooling device, the cooling device comprises a cold air cavity 8, a primary cooling box shell 9, a secondary cooling box shell 10, a front-mounted cooling blade 11, a rear-mounted primary pressurizing blade 12, a rear-mounted secondary pressurizing blade 13, a front-mounted blade chamber 14, a rear-mounted primary pressurizing blade chamber 15 and a rear-mounted secondary pressurizing blade chamber 16, the secondary cooling box shell 10 is arranged on the driving motor fixing frame 4, the primary cooling box shell 9 is arranged inside the secondary cooling box shell 10, the motor 5 is arranged inside the primary cooling box shell 9, a secondary cooling channel is formed between the secondary cooling box shell 10 and the primary cooling box shell 9, the primary cooling box shell 9 and the motor 5 form a primary cooling channel, and the front-mounted cooling blade 11 is arranged on the rear motor shaft 7, the front blade chamber 14 is arranged at the rear part of the primary cooling box shell 9, the front cooling blade 11 is arranged in the space of the front blade chamber 14, the cold air cavity 8 is arranged in the primary cooling box shell 9, the cold air cavity 8 is arranged at the rear end of the motor 5, the cold air cavity 8 is arranged at the front end of the front blade chamber 14, the rear primary pressurizing blade chamber 15 is arranged at the rear end of the secondary cooling box shell 10, the rear motor shaft 7 penetrates through the rear primary pressurizing blade chamber 15, the rear primary pressurizing blade 12 is arranged on the rear motor shaft 7, the rear primary pressurizing blade 12 is arranged in the space of the rear primary pressurizing blade chamber 15, the rear primary pressurizing blade chamber 15 is communicated with the secondary cooling channel, the rear secondary pressurizing blade chamber 16 is arranged at the rear end of the rear primary pressurizing blade chamber 15, and the rear motor shaft 7 penetrates through the rear secondary pressurizing blade chamber 16, the rear secondary pressurizing blade 13 is arranged on a rear motor shaft, the rear secondary pressurizing blade 13 is located in a space of a rear secondary pressurizing blade chamber 16, the secondary pressurizing blade chamber 16 is communicated with a primary pressurizing blade chamber 15, a tail end cooling outlet 17 is formed in the rear wall of the secondary pressurizing blade chamber 16, a heat return preventing baffle 18 is arranged at the rear end of the secondary pressurizing blade chamber 16, the front motor shaft 6 is rotatably arranged at the front end of a primary cooling box shell 9, the front motor shaft 6 penetrates through the front end of the primary cooling box shell 9 and extends out of the primary cooling box shell 9 from the front end of the primary cooling box shell 9, the blade assembly comprises a main blade 19 and a blade hub 20, the blade hub 20 is arranged at the front end of the front motor shaft 6, the main blade 19 is arranged on the blade hub 20, and the main blade 19 is circumferentially distributed.
The front end of the primary cooling box shell 9 is provided with a primary vent 21, and the primary vent 21 communicates the primary cooling channel with the secondary cooling channel.
The front motor shaft 6 of the motor 5 is provided with a plurality of groups of disturbing pieces 22, and the disturbing pieces 22 stir the cooling air to ensure that the cooling air and the front motor shaft 6 are subjected to sufficient heat exchange.
An air seal 23 is arranged at the front end of the primary cooling box shell 9, the front motor shaft 6 penetrates through the air seal 23, and the front motor shaft 6 is rotatably arranged on the air seal 23.
The secondary cooling tank shell 10 and the outer wall of the postposition primary pressurizing blade chamber 15 are provided with heat insulation cotton, and the purpose is to prevent hot air from heating the secondary cooling tank shell 10 too fast, so that the temperature rise of the primary cooling tank shell 9 connected with the secondary cooling tank shell 10 is too fast.
And heat insulation cotton is arranged between the heat-proof baffle 18 and the rear secondary pressurizing blade chamber 16.
When the motor 5 starts to operate, the main blade 19 rotates to blow hot air into the exhaust fan shell 1, the front cooling blade 11 rotates, cold air is sucked from the cold air cavity 8 and enters a primary cooling channel formed by the primary cooling box shell 9 and the shell of the motor 5, the cold air is gradually heated and enters the foremost end of the primary cooling channel, the disturbance blade 22 rotates along with the front motor shaft 6, the disturbance blade 22 helps the front motor shaft 6 to dissipate heat because the front motor shaft 6 is hotter than the rear motor shaft 7, the cold air then enters a secondary cooling channel formed between the secondary cooling box shell 10 and the primary cooling box shell 9 through the primary ventilation opening 21, the cold air moves towards the rear end of the secondary cooling channel to cool the secondary cooling box shell 10, then the cold air enters the rear primary pressurizing blade chamber 15, the cold air is pressurized by the rear primary pressurizing blade 12 and pressurized in the rear pressurizing secondary blade chamber 16, the rear secondary pressurizing blade chamber 16 is pressurized by the rear secondary pressurizing blade 13 and enters the rear cooling shell 1 through the tail end cooling outlet 17, and the hot air backflow preventing baffle 18 can effectively heat-return the hot air heating baffle plate.
It is to be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, and the terms "comprising", "including", or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an independent cooling type fire control smoke exhaust fan which characterized in that: the smoke exhaust fan is characterized by comprising a smoke exhaust fan shell, a driving assembly and a blade assembly, wherein the driving assembly is arranged in the smoke exhaust fan shell, the blade assembly is arranged on the driving assembly, the smoke exhaust fan shell is of a cylindrical structure with openings at two ends, a foot plate is arranged below the smoke exhaust fan shell, a suspension ring seat is arranged above the smoke exhaust fan shell, a driving motor fixing frame is arranged on the inner bottom wall of the smoke exhaust fan shell, the driving assembly comprises a motor and a cooling device, the cooling device is arranged on the driving motor fixing frame of the smoke exhaust fan shell, the motor is arranged in the cooling device and is provided with a front motor shaft and a rear motor shaft, the front motor shaft and the rear motor shaft are rotatably arranged on the cooling device, the front motor shaft penetrates through the front end of the cooling device and extends out of the cooling device from the front end of the cooling device, and the rear motor shaft penetrates through the rear end of the cooling device, the cooling device comprises a cold air cavity, a primary cooling box shell, a secondary cooling box shell, a prepositive cooling blade, a postpositive primary pressurizing blade, a postpositive secondary pressurizing blade, a prepositive blade chamber, a postpositive primary pressurizing blade chamber and a postpositive secondary pressurizing blade chamber, wherein the secondary cooling box shell is arranged on a driving motor fixing frame, the primary cooling box shell is arranged inside the secondary cooling box shell, a motor is arranged inside the primary cooling box shell, a secondary cooling channel is formed between the secondary cooling box shell and the primary cooling box shell, the primary cooling box shell and the motor shell form a primary cooling channel, the prepositive cooling blade is arranged on a rear motor shaft, the prepositive blade chamber is arranged at the rear part of the primary cooling box shell, the prepositive cooling blade is positioned in a prepositive blade chamber space, the cold air cavity is arranged inside the primary cooling box shell, the cold air cavity is arranged at the rear end of the motor, the cold air cavity is arranged at the front end of the front blade chamber, the rear primary pressurizing blade chamber is arranged at the rear end of the shell of the secondary cooling box, the rear motor shaft penetrates through the rear primary pressurizing blade chamber, the rear primary pressurizing blade is arranged on the rear motor shaft, the rear primary pressurizing blade is positioned in the space of the rear primary pressurizing blade chamber, the rear primary pressurizing blade chamber is communicated with the secondary cooling channel, the rear secondary pressurizing blade chamber is arranged at the rear end of the rear primary pressurizing blade chamber, the rear motor shaft penetrates through the rear secondary pressurizing blade chamber, the rear secondary pressurizing blade is arranged on the rear motor shaft, and the rear secondary pressurizing blade is positioned in the space of the rear secondary pressurizing blade chamber, secondary pressurization blade room and the blade room UNICOM of once pressurizeing, secondary pressurization blade room back wall is equipped with terminal cooling hole, secondary pressurization blade room rear end is equipped with prevents back heat baffle, the preceding motor shaft rotates and locates a cooling tank casing front end, preceding motor shaft runs through a cooling tank casing front end and extends to outside a cooling tank casing from a cooling tank casing front end, the blade assembly includes main blade and blade wheel hub, preceding motor shaft front end is located to blade wheel hub, the main blade is located on the blade wheel hub, main blade is the circumference and distributes, a cooling tank casing front end is equipped with a vent, and a cooling channel and secondary cooling channel UNICOM will be given first time to the vent.
2. An independently cooled fire smoke exhaust fan according to claim 1, wherein: and a motor shaft in front of the motor is provided with disturbance pieces, and the disturbance pieces are provided with a plurality of groups.
3. An independently cooled fire smoke exhaust fan according to claim 1, wherein: the front end of the primary cooling box shell is provided with an air seal, the front motor shaft penetrates through the air seal, and the front motor shaft is rotatably arranged on the air seal.
4. An independently cooled fire smoke exhaust fan according to claim 1, wherein: and the secondary cooling box shell and the outer wall of the rear primary pressurizing blade chamber are provided with heat insulation cotton.
5. An independently cooled fire smoke exhaust fan according to claim 1, wherein: and heat insulation cotton is arranged between the heat-return prevention baffle and the rear secondary pressurizing blade chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110016582.2A CN112814928B (en) | 2021-01-07 | 2021-01-07 | Independent cooling type fire-fighting smoke exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110016582.2A CN112814928B (en) | 2021-01-07 | 2021-01-07 | Independent cooling type fire-fighting smoke exhaust fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112814928A CN112814928A (en) | 2021-05-18 |
| CN112814928B true CN112814928B (en) | 2022-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110016582.2A Active CN112814928B (en) | 2021-01-07 | 2021-01-07 | Independent cooling type fire-fighting smoke exhaust fan |
Country Status (1)
| Country | Link |
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| CN (1) | CN112814928B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2454576Y (en) * | 2000-12-22 | 2001-10-17 | 郑宝红 | Self-suction cooling type fire-fighting smoke-exhausting fan |
| CN2480597Y (en) * | 2001-05-18 | 2002-03-06 | 北京新安特玻璃钢设备有限公司 | Self-cooling type smoke-exhausting blower fan for fire-fighting |
| CN201013672Y (en) * | 2007-04-04 | 2008-01-30 | 陈泽民 | Refrigerating mechanism used for double stage axial-flow draught fan |
| CN204419713U (en) * | 2014-12-01 | 2015-06-24 | 沈毓珍 | Length-adjustable cooling blower |
| CN206770257U (en) * | 2017-06-07 | 2017-12-19 | 福建华泰通风空调装备有限公司 | Axial-flow type smoke exhaust fan |
| DE102018102733A1 (en) * | 2018-02-07 | 2019-08-08 | Dlk Ventilatoren Gmbh | centrifugal fan |
| CN208169178U (en) * | 2018-05-22 | 2018-11-30 | 刘春凤 | Smoke exhaust fan |
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2021
- 2021-01-07 CN CN202110016582.2A patent/CN112814928B/en active Active
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| CN112814928A (en) | 2021-05-18 |
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