CN108006763B - Self-cleaning range hood - Google Patents
Self-cleaning range hood Download PDFInfo
- Publication number
- CN108006763B CN108006763B CN201710532007.1A CN201710532007A CN108006763B CN 108006763 B CN108006763 B CN 108006763B CN 201710532007 A CN201710532007 A CN 201710532007A CN 108006763 B CN108006763 B CN 108006763B
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- nozzle
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- impeller
- range hood
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- 238000004140 cleaning Methods 0.000 title claims abstract description 94
- 238000005507 spraying Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 241000208125 Nicotiana Species 0.000 description 3
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000013020 steam cleaning Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
- F24C15/2057—Removing cooking fumes using a cleaning liquid
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles (AREA)
- Ventilation (AREA)
Abstract
The invention relates to a self-cleaning range hood, which comprises an outer cover, a fan, a self-cleaning assembly and a self-cleaning device, wherein the fan is provided with a volute and an impeller arranged in the volute; the side wall of the volute tongue, which is close to the impeller, is provided with an opening for the cleaning medium to pass through, and the nozzle is provided with a spout corresponding to the opening. According to the self-cleaning device, the nozzle of the self-cleaning component is arranged in the volute tongue, and the flow field pressure at the position of the volute tongue is minimum, and the position of the volute tongue is nearest to the impeller blades on one circle of the whole volute annular wall, so that the stroke of the cleaning medium after being sprayed is effectively shortened, meanwhile, a pipeline for conveying the cleaning medium is conveniently shortened, the conveying stroke of the cleaning medium before being sprayed is shortened, the heat energy loss of the cleaning medium is reduced, and the self-cleaning effect is improved; the nozzle is arranged in the volute tongue, so that the structural integrity of the fan system is ensured, and the problems of noise initiation, reduced oil smoke absorption efficiency and the like in the cleaning process are avoided.
Description
Technical Field
The invention relates to a self-cleaning range hood.
Background
In the use process of the range hood, a large amount of oil stains can be accumulated on the impeller and the filter screen, and the oil stains are easy to cause blockage, load increase and the like, so that the use effect of the range hood is affected. With the continuous progress of self-cleaning technology of the range hood, steam cleaning is widely applied to the self-cleaning field of the range hood. The basic principle of steam cleaning is that steam is generated by a steam generator and then is conveyed to a nozzle at the tail end of a spray pipe, and the steam is rapidly sprayed out of the nozzle to wash an impeller and a volute for cleaning.
For example, the Chinese patent application No. CN 106180036A discloses a structure of a cleaning assembly for a tobacco machine and a tobacco machine (201610563284.4), wherein the cleaning assembly for the tobacco machine comprises a pressing plate seat, a pressing plate, a cleaning spray pipe and a sensor, the sensor is connected to the pressing plate seat, the pressing plate seat is provided with a spray pipe accommodating groove, and the cleaning spray pipe is accommodated in the spray pipe accommodating groove and is fixed by the pressing plate. In the structure, the spray nozzle is arranged on the air inlet surface of the impeller, when the range hood works normally, the air flow speed at the position is high, the pressure is high, the cleaning module and the jet pipe which are directly exposed and protruded form interference to the air inlet of the fan for a long time, so that the efficiency of absorbing oil and smoke is reduced, and noise is easily caused; meanwhile, the pipeline is longer, and the heat energy loss is larger when the steam reaches the impeller, so that the cleaning effect is influenced.
The Chinese patent application publication No. CN 105757745A discloses a structure of a cleaning system of a range hood, a range hood and a control method of the range hood (application No. 201610091921.2), wherein the cleaning system of the range hood comprises: the oil pollution detection device is used for detecting pollution degree data of an impeller of the range hood; the water pump is used for pumping water; and one end of the control device is connected to the oil stain detection device, the other end of the control device is connected to the water pump, and the control device is used for receiving the pollution degree data from the oil stain detection device and controlling the water pumping flow of the water pump according to the pollution degree data. The range hood with the structure has larger occupied space, longer pipeline and larger heat energy loss when steam reaches the impeller, so that the cleaning effect is greatly weakened.
Therefore, there is a need for further improvement in the current range hood with a steam cleaning self-cleaning structure.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-cleaning range hood capable of improving the self-cleaning effect by shortening the stroke of a cleaning medium.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a self-cleaning range hood, includes dustcoat and fan, the fan is located in the dustcoat and has the spiral case and locates the impeller in the spiral case, be provided with volute tongue, its characterized in that on the spiral case: the self-cleaning assembly is provided with a nozzle, an accommodating cavity is formed on the outer wall of the volute at the volute tongue, and the nozzle is arranged in the accommodating cavity; the side wall of the volute tongue, which is close to the impeller, is provided with an opening through which the cleaning medium passes, and the nozzle is provided with a spout corresponding to the opening.
In order to facilitate assembly, the nozzle is provided with a plug-in part which can be inserted into the opening, the end surface of the plug-in part is matched with the surface of the volute tongue, which is close to the impeller, in the assembled state, and the nozzle is arranged on the end surface of the plug-in part and is axially arranged along the impeller along the width direction of the nozzle.
Preferably, the first side surface of the nozzle extends outwards along the axial direction of the impeller to form a supporting plate, and in the assembled state, the supporting plate abuts against the inner surface of the volute tongue so as to limit the inserting position of the inserting part in the opening.
As an improvement, be provided with in the nozzle and carry the cleaning medium to the spout and be radial spun transport runner, this transport runner includes input and the guiding part that links up with this input, the input takes shape to the cylindric structure that outwards extends from the first side of nozzle, the first end of guiding part is connected with the output of input, the second end of guiding part is connected with the spout, just the guiding part is from first end to second end expansion gradually to both sides and is formed into fan-shaped inner chamber.
According to the flowing direction of the cleaning medium, the cross section area of the guide part gradually decreases from front to back and the width of the flow channel gradually increases, and the fan-shaped inner cavity of the guide part smoothly transits at the bending part of the nozzle.
By adopting the structure, the sectional area of the flow channel is gradually reduced from the inlet of the guide part, so that the flow speed of the cleaning medium is gradually increased, the cleaning medium reaches the maximum speed at the nozzle and is radially sprayed out, the width of the impeller is covered, the cleaning area is wide, the bending transition of the flow channel is stable, and the loss of the flow speed of the cleaning medium at the elbow is small.
Preferably, the inlet area of the conveying flow channel is S 1 The outlet area is S 2 And S is 1 ≥4S 2 . With such a structure, the cleaning medium is arranged inThe spraying speed at the nozzle is more than 4 times of the flowing speed in the flow channel, so that the cleaning force is ensured.
Preferably, the input part has an inner diameter D 1 The width L of the nozzle 2 The length of the central line of the guide part is L 3 The radius of the central line of the guide part is R 2 The spraying angle of the nozzle is A 1 ，
Preferably, 30 DEG.ltoreq.A 1 ≤150°，L 2 ≥2D 1 ，R 2 ≥1.5D 1 。
By adopting the structure, the size of the spraying angle of the nozzle is ensured to be large enough, the width of the nozzle is wide enough to cover the whole width of the impeller, and no dead angle exists in the cleaning process; the radius of the central line is ensured to be large enough, the corner change of the flow channel is smooth enough, and the flow velocity loss caused by the elbow is reduced.
The number of the conveying flow channels is n, the conveying flow channels are arranged on the nozzles at intervals, and n is more than or equal to 1; the total width of the impeller blades is L 4 Each nozzle has a width L 1 The distance from the nozzle to the surface of the impeller blade is D 4 ，
L 2 +2D 4 tan(A 1 /2)＝L1，nL 1 ≥L 4 。
Preferably, the distance from the center line of the conveying flow channel near the edge on the nozzle to the end of the impeller is D 2 The distance between the central lines of two adjacent conveying flow channels is D 3 ，D 2 ≤(L 1 /2)，D 3 ≤L 1 。
The structure can ensure that the cleaning medium sprayed out of the nozzle completely covers the width of the impeller, thereby achieving the purpose of comprehensive cleaning.
In each of the above preferred embodiments, the self-cleaning assembly further comprises a steam generator and a conduit, wherein the steam generator is arranged on the fan and is arranged close to the air outlet, the output end of the steam generator is connected with the first end of the conduit, and the second end of the conduit is connected with the input end of the nozzle. By adopting the structure, the self-cleaning assembly has compact integral structure, and the maximum vacant space is arranged in the area behind the volute tongue because the internal space of the range hood is precious, so that the arrangement of the self-cleaning assembly can not only efficiently utilize the only vacant space left in the range hood, but also ensure that the self-cleaning assembly has compact structure, short pipeline, less elbow, small energy loss and high efficiency; meanwhile, the self-cleaning assembly is compact in structure, elements are not redundant, and the reliability of the whole self-cleaning system is improved.
Compared with the prior art, the invention has the advantages that: the self-cleaning assembly is characterized in that the self-cleaning assembly comprises a volute tongue, a flow field is arranged at the position of the volute tongue, and the flow field is arranged at the position of the volute tongue, wherein the flow field is at the position of the volute tongue, and the flow field is at the position of the volute tongue. Meanwhile, the nozzles are arranged in the volute tongue, so that the structural integrity of the fan system is not damaged, and the problems of noise and reduced oil smoke absorption efficiency in the cleaning process are avoided.
Drawings
FIG. 1 is a schematic view of a hidden housing according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of an assembly structure of a self-cleaning assembly and a volute tongue according to an embodiment of the present invention;
FIG. 4 is an exploded view of FIG. 3;
FIG. 5 is a schematic view of the nozzle of FIG. 4;
FIG. 6 is a schematic diagram of a conveying flow channel according to an embodiment of the present invention;
FIG. 7 is a schematic view of a position arrangement between a nozzle and impeller blades in an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 7, the self-cleaning range hood of the present embodiment includes a housing (not shown), a fan 1 and a self-cleaning assembly 2, the fan 1 is disposed in the housing and has a volute 11 and an impeller 12 disposed in the volute 11, and a volute tongue 13 is disposed on the volute 11. The self-cleaning assembly 2 of the present embodiment includes a nozzle 21, a steam generator 22 and a conduit 23, the outer wall of the volute 11 forms a containing cavity 131 at the volute tongue 13, the containing cavity 131 is located at the back of the volute tongue 13, the nozzle 21 is disposed in the containing cavity 131, the steam generator 22 is disposed on the fan 1 and near the air outlet 14 of the fan, and in the assembled state, the steam generator 22 is hidden between the front baffle 111 and the rear baffle 112 of the volute 11 and opposite to the opening of the containing cavity 131. The output of the steam generator 22 is connected to a first end of a conduit 23 and a second end of the conduit 23 is connected to the input of the nozzle 21. The sidewall of the volute tongue 13, which is close to the impeller 12, is provided with an opening 132 through which the cleaning medium passes, and the nozzle 21 is provided with a nozzle 211 corresponding to the opening 132.
Because the flow field pressure at the volute tongue 13 is minimum, and the volute tongue 13 is nearest to the impeller 12 blades on the whole periphery of the volute 11, when the self-cleaning device is used, the nozzle 21 can directly spray the cleaning medium to the impeller 12 at the volute tongue 13 through the nozzle 211, so that the stroke of the cleaning medium after spraying is effectively shortened, meanwhile, the steam generator 22 is arranged between the front baffle 111 and the rear baffle 112 of the volute 11 and close to the air outlet 14, the setting position of the steam generator 22 determines that the distance between the steam generator and the nozzle 21 is short, the cleaning medium can be conveyed by adopting a short conduit 22, and the conveying stroke of the cleaning medium before spraying is shortened, so that the heat energy loss of the cleaning medium is reduced, and the self-cleaning effect is improved.
In the present embodiment, the nozzle 21 is formed with a plug portion 212 that can be inserted into the opening 132, and in the assembled state, the end surface of the plug portion 212 coincides with the surface of the volute tongue 13 near the impeller 12, and the nozzle 211 is opened on the end surface of the plug portion 212 and is axially arranged along the impeller 12 in the width direction of the nozzle 211. The first side of the nozzle 21 extends axially outwardly of the impeller 12 to form a plate 213, and in the assembled condition, the plate 213 abuts the inner surface of the tongue 12 to limit the position of insertion of the insert 212 into the opening 132.
The nozzle 21 is provided therein with a conveying flow path 20 capable of conveying the cleaning medium to the nozzle 211 and radially spraying the cleaning medium, the conveying flow path 20 includes an input portion 201 and a guide portion 202 connected to the input portion 201, the input portion 201 is formed into a cylindrical structure extending outwardly from a first side surface of the nozzle 21, a first end of the guide portion 202 is connected to an output end of the input portion 201, a second end of the guide portion 202 is connected to the nozzle 211, and the guide portion 202 is gradually expanded from the first end to the second end to form a fan-shaped inner cavity. The cross-sectional area of the guide portion 202 gradually decreases from front to back and the flow channel width gradually increases according to the flow direction of the cleaning medium, and the fan-shaped inner cavity of the guide portion 202 smoothly transitions at the bending portion of the nozzle 21. Thus, the flow passage sectional area gradually decreases from the initial end of the guide portion 202, so that the flow speed of the cleaning medium gradually increases, the cleaning medium reaches the maximum speed at the nozzle 211 and is radially ejected, the width of the impeller 12 is covered, the cleaning area is wide, the bending transition of the flow passage is stable, and the loss of the flow speed of the cleaning medium at the elbow is small.
In the present embodiment, as shown in fig. 6, the inlet area of the delivery flow path 20 is S 1 The outlet area is S 2 And S is 1 ≥4S 2 So that the spraying speed of the cleaning medium at the nozzle 211 is more than 4 times of the flowing speed of the flow passage, and the cleaning force is ensured. The inner diameter of the input portion 201 is D 1 Width L of nozzle 211 2 The center line length of the guide 202 is L 3 The center line radius of the guide 202 is R 2 The discharge angle of the nozzle 211 is A 1 Satisfies the following conditions
In this example, more optimal conditions of 30.ltoreq.A are further selected 1 ≤150°，L 2 ≥2D 1 ，R 2 ≥1.5D 1 . To ensure that the angle of the discharge orifice 211 is large enough and the width of the discharge orifice 211 is wide enough to coverTo the full width of the impeller 12 so that the cleaning process is dead-angle free; the radius of the central line is ensured to be large enough, the corner change of the flow channel is smooth enough, and the flow velocity loss caused by the elbow is reduced.
As shown in FIG. 7, the number of the conveying runners 20 is n, and the conveying runners are arranged on the nozzles 21 at intervals, wherein n is equal to or greater than 1; the total width of the blades 121 of the impeller 12 is L 4 Each nozzle 211 is sprayed onto the vane of the impeller 12 with a width L 1 The nozzle 211 is spaced from the surface of the vane of the impeller 12 by a distance D 4 ，L 2 +2D 4 tan(A 1 /2)＝L1，nL 1 ≥L 4 . The distance D from the center line of the conveying flow channel 20 near the edge of the nozzle 21 to the end of the impeller 12 2 The distance between the center lines of two adjacent conveying runners 20 is D 3 ，D 2 ≤(L 1 /2)，D 3 ≤L 1 . The structure can ensure that the cleaning medium sprayed out of the nozzle 21 completely covers the width of the impeller 12, thereby achieving the purpose of comprehensive cleaning.
Claims (9)
1. The utility model provides a self-cleaning range hood, includes dustcoat and fan (1), in fan (1) are located the dustcoat and have spiral case (11) and locate impeller (12) in spiral case (11), be provided with volute tongue (13), its characterized in that on spiral case (11): the self-cleaning volute also comprises a self-cleaning assembly (2) with a nozzle (21), wherein a containing cavity (131) is formed on the outer wall of the volute (11) at the volute tongue (13), and the nozzle (21) is arranged in the containing cavity (131); an opening (132) for a cleaning medium to pass through is formed in the side wall, close to the impeller (12), of the volute tongue (13), and a spout (211) corresponding to the opening (132) is formed in the nozzle (21) correspondingly;
a conveying runner (20) capable of conveying a cleaning medium to a nozzle (211) and spraying the cleaning medium radially is arranged in the nozzle (21), the conveying runner (20) comprises an input part (201) and a guide part (202) connected with the input part (201), the input part (201) is shaped into a cylindrical structure extending outwards from a first side surface of the nozzle (21), a first end of the guide part (202) is connected with an output end of the input part (201), a second end of the guide part (202) is connected with the nozzle (211), and the guide part (202) gradually expands to two sides from the first end to the second end to form a fan-shaped inner cavity;
the inner diameter of the input part (201) is D 1 The width L of the nozzle (211) 2 The central line length of the guide part (202) is L 3 The center line radius of the guide part (202) is R 2 The spraying angle of the nozzle (211) is A 1 ，
The nozzle (21) is provided with a plug-in part (212) which can be inserted into the opening (132), and in the assembled state, the end surface of the plug-in part (212) is matched with the surface of the volute tongue (13) close to the impeller (12).
2. The self-cleaning range hood according to claim 1, wherein: the nozzle (211) is arranged on the end face of the plug-in part (212) and is axially arranged along the impeller (12) along the width direction of the nozzle (211).
3. A self-cleaning range hood according to claim 2, characterized in that: the first side surface of the nozzle (21) extends outwards along the axial direction of the impeller (12) to form a supporting plate (213), and in the assembled state, the supporting plate (213) abuts against the inner surface of the volute tongue (13) so as to limit the inserting position of the inserting part (212) in the opening (132).
4. The self-cleaning range hood according to claim 1, wherein: according to the flowing direction of the cleaning medium, the cross section area of the guide part (202) is gradually reduced from front to back, the flow channel width is gradually increased, and the fan-shaped inner cavity of the guide part (202) is smoothly transited at the bending part of the nozzle (21).
5. The self-cleaning range hood according to claim 1, wherein: the inlet area of the conveying runner (20) is S 1 The outlet area is S 2 And S is 1 ≥4S 2 。
6. The self-cleaning range hood according to claim 1, wherein: a is not more than 30 DEG 1 ≤150°，L 2 ≥2D 1 ，R 2 ≥1.5D 1 。
7. The self-cleaning range hood according to claim 1, wherein: the number of the conveying runners (20) is n, the n conveying runners are arranged on the nozzles (21) at intervals, and n is more than or equal to 1; the total width of the blades (121) of the impeller (12) is L 4 Each nozzle (211) is sprayed onto the blade (121) of the impeller (12) with a width L 1 The distance from the nozzle (211) to the surface of the impeller blade (121) is D 4 ，
L 2 +2D 4 tan(A 1 /2)＝L1，nL 1 ≥L 4 。
8. The self-cleaning range hood of claim 7, wherein: the distance from the center line of the conveying flow channel (20) near the edge of the nozzle (21) to the end part of the impeller (12) is D 2 The distance between the central lines of two adjacent conveying flow channels (20) is D 3 ，D 2 ≤(L 1 /2)，D 3 ≤L 1 。
9. A self-cleaning range hood according to any one of claims 1 to 8, characterized in that: the self-cleaning assembly (2) further comprises a steam generator (22) and a conduit (23), wherein the steam generator (22) is arranged on the fan (1) and is close to the air outlet (14), the output end of the steam generator (22) is connected with the first end of the conduit (23), and the second end of the conduit (23) is connected with the input end of the nozzle (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532007.1A CN108006763B (en) | 2017-07-03 | 2017-07-03 | Self-cleaning range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532007.1A CN108006763B (en) | 2017-07-03 | 2017-07-03 | Self-cleaning range hood |
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| Publication Number | Publication Date |
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| CN108006763A CN108006763A (en) | 2018-05-08 |
| CN108006763B true CN108006763B (en) | 2024-02-20 |
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| CN201710532007.1A Active CN108006763B (en) | 2017-07-03 | 2017-07-03 | Self-cleaning range hood |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644840B (en) * | 2018-06-25 | 2024-08-13 | 广东万和电气有限公司 | Smoke ventilator nozzle and self-cleaning smoke ventilator using same |
| CN109386502B (en) * | 2018-09-27 | 2020-09-01 | 佛山市顺德区美的洗涤电器制造有限公司 | Volute tongue, fan and range hood |
| CN109058167B (en) * | 2018-09-27 | 2024-05-07 | 佛山市顺德区美的洗涤电器制造有限公司 | Volute tongue, volute and range hood |
| CN111578332B (en) * | 2019-02-17 | 2021-07-23 | 宁波方太厨具有限公司 | Range hood's fan system convenient to it is clean |
| CN111852960A (en) * | 2019-04-28 | 2020-10-30 | 广东万和电气有限公司 | Steam cleaning structure of range hood |
| CN110355136A (en) * | 2019-06-19 | 2019-10-22 | 浙江帅康电气股份有限公司 | Pulse steam pressure washes integrated kitchen range |
| CN112228933B (en) * | 2020-10-14 | 2021-11-16 | 珠海格力电器股份有限公司 | Control method and device of range hood, range hood system and processor |
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| Publication number | Publication date |
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| CN108006763A (en) | 2018-05-08 |
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