CN109404309B - Multi-wing centrifugal fan - Google Patents
Multi-wing centrifugal fan Download PDFInfo
- Publication number
- CN109404309B CN109404309B CN201710702717.4A CN201710702717A CN109404309B CN 109404309 B CN109404309 B CN 109404309B CN 201710702717 A CN201710702717 A CN 201710702717A CN 109404309 B CN109404309 B CN 109404309B
- Authority
- CN
- China
- Prior art keywords
- heating
- impeller
- blades
- heat conducting
- centrifugal fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- 239000000779 smoke Substances 0.000 claims abstract description 27
- 238000005452 bending Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Abstract
The utility model discloses a multi-wing centrifugal fan, which comprises a volute, wherein an impeller and a motor for driving the impeller to rotate are arranged in the volute, the impeller comprises blades and end rings arranged at two ends of the blades, and the multi-wing centrifugal fan is characterized in that: a heating device for heating the blades is mounted on the impeller. Compared with the prior art, the utility model has the advantages that: according to the multi-wing centrifugal fan, the heating device capable of heating the blades is arranged on the impeller, so that the phenomenon that oil drops are coagulated when oil smoke passes through the blades due to low surface temperature of the blades can be effectively reduced, the cleaning period of the impeller is prolonged, and the blades are guaranteed to be in an effective working state for a long time.
Description
Technical Field
The utility model relates to a multi-wing centrifugal fan.
Background
The multi-wing centrifugal fan is widely applied to the field of household range hoods due to the advantages of low noise, higher pressure head, small volume and the like. When the range hood works, the impeller is exposed in a high-oil-smoke environment for a long time, when oil smoke passes through the impeller, because the surface temperature of the blades is lower, the high-temperature oil smoke encounters the low-temperature wall surface and is condensed, so that oil accumulation on the surface of the blades is caused, the oil stain on the surface of the blades reaches a certain thickness along with the accumulation of the running time, the weight of the impeller can be increased, the load of the motor is increased, the performance is reduced, the noise is increased, the running of a fan system is seriously influenced, and the range hood cannot work normally. In addition, the cleaning is very difficult due to the fact that the blades of the multi-wing centrifugal fan are more, the motor is possibly damaged due to the fact that the cleaning method is improper, parts are deformed due to the fact that the range hood is frequently disassembled, and therefore the service life of the range hood is affected.
At present, a range hood capable of removing oil is disclosed in the prior art, such as "a range hood with a novel oil removing device" disclosed in chinese patent No. ZL 201520750971.8 (issued patent No. CN 205065847U), wherein the range hood covers a heating device on the outer surface of a volute, and the volute body and a wind wheel can be heated by heat conduction, and the unique setting mode of a heating wire and the setting of a heat conducting device can enable the inside of the whole volute to be heated uniformly, so as to improve the oil removing effect. Although the lampblack absorber can keep the inside of the spiral case smooth and clean through heating the spiral case, wind resistance is reduced, but because a gap exists between the spiral case and the impeller, heat on the spiral case is not easy to conduct directly to the impeller, so that the heating effect on the impeller is limited, the effect of removing oil stains on the blades is not obvious, and after the fan runs for a long time, the surfaces of the blades can adsorb a large amount of oil stains.
Disclosure of Invention
Aiming at the current state of the art, the utility model provides a multi-wing centrifugal fan capable of effectively avoiding oil drops from condensing on the surface of a blade.
The technical scheme adopted for solving the technical problems is as follows: the multi-wing centrifugal fan comprises a volute, wherein an impeller and a motor for driving the impeller to rotate are arranged in the volute, and the impeller comprises blades and end rings arranged at two ends of the blades, and is characterized in that: a heating device for heating the blades is mounted on the impeller.
The heating device may have various structures, and preferably, the heating device includes a heating control device for controlling a heating temperature of the heating element, a heating element for conducting heat to the heat conducting element, and a heat conducting element for directly heating the blade.
Further preferably, the heating element is a heating pipe disposed along a circumferential direction of an outer side surface of the end ring, and the heating control device and the heating pipe are mounted on the same end ring.
In order to enable the heating pipe to have a better heating effect, the heating pipe is of a wavy bending structure.
In order to not only improve the aerodynamic performance of the fan, but also enable the blades to be heated uniformly, the blades are provided with hollow parts, the heat conducting elements are heat conducting pipes, at least one heat conducting pipe is arranged in each blade, the inner end of each heat conducting pipe extends into the hollow part, and the outer end of each heat conducting pipe is arranged on the end ring where the heating pipe is located.
Further preferably, the fan comprises a front air inlet and a rear air inlet, an air inlet ring is arranged on the front end ring of the impeller, and the heating control device and the heating pipe are arranged on the rear end ring of the impeller.
In order to improve the intelligent degree of the heating device, an oil smoke sensor is further installed in the volute, a signal output end of the oil smoke sensor is electrically connected with a signal input end of the heating control device, and the heating control device controls the heating temperature of the heating element according to the received output signal of the oil smoke sensor.
In order to smoothly guide the oil smoke in the fan frame into the air inlet, an air deflector for guiding the oil smoke to the air inlet of the fan is arranged at the bottom of the volute.
In order to smoothly fix the motor on the volute, a motor seat is arranged on the volute, and the motor is arranged on the motor seat.
Compared with the prior art, the utility model has the advantages that: according to the multi-wing centrifugal fan, the heating device capable of heating the blades is arranged on the impeller, so that the phenomenon that oil drops are coagulated when oil smoke passes through the blades due to low surface temperature of the blades can be effectively reduced, the cleaning period of the impeller is prolonged, and the blades are guaranteed to be in an effective working state for a long time.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of an embodiment of the present utility model;
FIG. 3 is a schematic view of an impeller according to an embodiment of the present utility model;
FIG. 4 is an exploded view of an impeller according to an embodiment of the present utility model;
fig. 5 is a schematic structural view of a blade according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 5, the multi-wing centrifugal fan in this embodiment includes a volute 1, an impeller 2 and a motor 3 for driving the impeller to rotate are disposed in the volute 1, a motor base 8 is disposed on the volute 1, and the motor 3 is mounted on the motor base 8. The impeller 2 comprises blades 21, a front end ring 22 and a rear end ring 23, wherein the front end ring 22 is arranged at the front end of the blades 21, the rear end ring 23 is arranged at the rear end of the blades 21, and the bottom of the volute 1 is provided with an air deflector 7 for guiding oil smoke to an air inlet of the fan. The above-described structure is the same as that of the conventional centrifugal fan, and will not be described in detail herein.
A heating device is mounted on the impeller 2, and the heating device is used for heating the blades 21. In this embodiment, the heating device includes a heating control device 41, a heating element, and a heat conducting element, wherein the heating control device 41 is used for controlling the heating temperature of the heating element, the heating element is used for conducting heat to the heat conducting element, and the heat conducting element is used for directly heating the blade 21.
In this embodiment, the blower includes a front air inlet 51 and a rear air inlet 52, an air inlet ring 6 is installed on the front end ring 22 of the impeller 2, and a heating control device 41 and a heating element are installed on the rear end ring 23 of the impeller 2. Specifically, the heating element adopts a heating tube 42, the heating tube 42 is disposed along the circumferential direction of the outer side surface of the rear end ring 23, and, in order to improve the heating effect, the heating tube 42 has a wave-like bent structure.
In order to enhance the aerodynamic performance of the fan and to heat the blades uniformly, the blades 21 have a hollow 211. In this embodiment, the heat conducting element is a heat conducting tube 43, the heat conducting tube 43 may be made of a material with good heat conducting performance such as copper tube or copper-aluminum alloy tube, at least one heat conducting tube 43 is disposed inside each blade 21, the inner end of the heat conducting tube 43 extends into the hollow portion 211 of the blade 21, and the outer end of the heat conducting tube 43 is mounted on the rear end ring 23.
In addition, a smoke sensor (not shown) is also installed in the volute 1, a signal output end of the smoke sensor is electrically connected with a signal input end of the heating control device 41, and the heating control device 41 controls the heating temperature of the heating element according to the received output signal of the smoke sensor. When the oil smoke amount is more, the heating temperature rise is increased, and if the oil smoke amount is less, the heating temperature rise can be reduced, so that the energy-saving effect is achieved.
When the range hood works, oil smoke enters the fan frame from the smoke collecting cavity through the oil net, and is guided to the air inlet of the fan system through the air deflector 7, the oil smoke enters from the air inlet of the fan, the air inlet of the fan of the embodiment is provided with the front air inlet 51 and the rear air inlet 52, the impeller 2 rotates, so that oil smoke gas has kinetic energy and pressure energy, when the impeller 2 operates, the heating device is started, the heat energy is transmitted to the blades 21 through the heat conducting pipes 43, the surface of the blades 21 is heated, the high-temperature oil smoke cannot be condensed when encountering cold wall surfaces, and finally the pressurized oil smoke gas is discharged out of the smoke tube through the air outlet cover.
The foregoing is merely illustrative of the preferred embodiments of this utility model, and it will be appreciated by those skilled in the art that variations and modifications of this utility model can be made without departing from the principles of the utility model, and these are considered to be within the scope of the utility model.
Claims (5)
1. The utility model provides a many wings centrifugal fan, includes spiral case (1), be equipped with impeller (2) and drive impeller pivoted motor (3) in spiral case (1), impeller (2) are including blade (21) and install the end circle at the blade both ends, its characterized in that: the impeller (2) is provided with a heating device for heating the blades (21), the heating device comprises a heating control device (41), a heating element and a heat conducting element, the heating control device (41) is used for controlling the heating temperature of the heating element, the heating element is used for conducting heat to the heat conducting element, the heat conducting element is used for directly heating the blades (21), the heating element is a heating pipe (42) which is arranged along the circumferential direction of the outer side surface of the end ring, the heating control device (41) and the heating pipe (42) are arranged on the end ring on the same side, the blades (21) are provided with hollow parts (211), the heat conducting element is a heat conducting pipe (43), at least one heat conducting pipe (43) is arranged inside each blade (21), the inner end of the heat conducting pipe (43) stretches into the hollow part (211), the outer end of the heat conducting pipe (43) is arranged at the end of the end ring where the heating pipe (42) is located, the fan comprises a front (51) and a rear (52), and the front air inlet (2) is provided with an air inlet (23) on the front air inlet (2) and the rear air inlet (2).
2. The multi-wing centrifugal fan according to claim 1, wherein: the heating pipe (42) is of a wavy bending structure.
3. The multi-wing centrifugal fan according to claim 1, wherein: and an oil smoke sensor is further arranged in the volute (1), a signal output end of the oil smoke sensor is electrically connected with a signal input end of the heating control device (41), and the heating control device (41) controls the heating temperature of the heating element according to the received output signal of the oil smoke sensor.
4. The multi-wing centrifugal fan according to claim 1, wherein: an air deflector (7) for guiding the oil smoke to the air inlet of the fan is arranged at the bottom of the volute (1).
5. The multi-wing centrifugal fan according to any one of claims 1-4, wherein: the spiral case (1) is provided with a motor base (8), and the motor (3) is arranged on the motor base (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702717.4A CN109404309B (en) | 2017-08-16 | 2017-08-16 | Multi-wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702717.4A CN109404309B (en) | 2017-08-16 | 2017-08-16 | Multi-wing centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109404309A CN109404309A (en) | 2019-03-01 |
| CN109404309B true CN109404309B (en) | 2024-01-12 |
Family
ID=65454535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710702717.4A Active CN109404309B (en) | 2017-08-16 | 2017-08-16 | Multi-wing centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404309B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1272597A (en) * | 1999-04-30 | 2000-11-08 | 柴岩芝 | Two-way blower fan |
| KR20080077045A (en) * | 2007-10-22 | 2008-08-21 | 미쓰비시덴키 가부시키가이샤 | Multiblade centrifugal blower |
| CN104564723A (en) * | 2013-10-16 | 2015-04-29 | 樱花卫厨（中国）股份有限公司 | Range hood wind wheel structure capable of removing oil by electrical heating |
| CN106524263A (en) * | 2016-12-16 | 2017-03-22 | 宁波方太厨具有限公司 | Range hood |
| CN207033789U (en) * | 2017-08-16 | 2018-02-23 | 宁波方太厨具有限公司 | A kind of multi-wing centrifugal fan |
-
2017
- 2017-08-16 CN CN201710702717.4A patent/CN109404309B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1272597A (en) * | 1999-04-30 | 2000-11-08 | 柴岩芝 | Two-way blower fan |
| KR20080077045A (en) * | 2007-10-22 | 2008-08-21 | 미쓰비시덴키 가부시키가이샤 | Multiblade centrifugal blower |
| CN104564723A (en) * | 2013-10-16 | 2015-04-29 | 樱花卫厨（中国）股份有限公司 | Range hood wind wheel structure capable of removing oil by electrical heating |
| CN106524263A (en) * | 2016-12-16 | 2017-03-22 | 宁波方太厨具有限公司 | Range hood |
| CN207033789U (en) * | 2017-08-16 | 2018-02-23 | 宁波方太厨具有限公司 | A kind of multi-wing centrifugal fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109404309A (en) | 2019-03-01 |
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