CN104963894A - Volute type centrifugal fan with one let and two outlets - Google Patents
Volute type centrifugal fan with one let and two outlets Download PDFInfo
- Publication number
- CN104963894A CN104963894A CN201510306094.XA CN201510306094A CN104963894A CN 104963894 A CN104963894 A CN 104963894A CN 201510306094 A CN201510306094 A CN 201510306094A CN 104963894 A CN104963894 A CN 104963894A
- Authority
- CN
- China
- Prior art keywords
- exhaust outlet
- spiral case
- volute
- type centrifugal
- centrifugal blower
- 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.)
- Pending
Links
Classifications
-
- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
-
- 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
- F04D29/4226—Fan casings
- F04D29/4246—Fan casings comprising more than one outlet
Abstract
The invention discloses a volute type centrifugal fan with one inlet and two outlets. The volute type centrifugal fan with the inlet and two outlets comprises a volute, blades installed in the volute and a blade motor, wherein the air inlet is formed in the volute; an air cavity is formed inside the volute and on the outer side of the blades; the first air outlet and the second air outlet between which an included angle is formed are formed in the tail of the air cavity of the volute; a reversing baffle is arranged inside the air cavity of the volute and can enable the first air outlet or the second air outlet to be communicated with the air cavity. A new air outlet is additionally arranged at an air outlet of a traditional volute centrifugal fan, and an included angle is formed between the two air outlets, so that when a normal mode and a cold air mode of a heat pump water heater with a cold air function are switched, reversing of media inside the fan needs can be finished as needed by adjusting the reversing baffle. The volute type centrifugal fan with the inlet and two outlets can well meet the requirements of machines. As the automatic switching type reversing baffle is applied to the fan, secondary reversing requirement of the medium inside the centrifugal fan is realized, and the characteristics of high air pressure and low noise of an original centrifugal fan are kept.
Description
Technical field
The present invention is used for overhead cable field, particularly relates to a kind of one-in-and-two-out
spiral caseformula centrifugal blower.
Background technique
At present, centrifugal fan is applied on heat pump water heater as a kind of common Fan Equipment, and relative to the axial-flow blower that heat pump is conventional, it is high with blast, noise is low, can change the advantages such as wind direction starts slowly to be widely used on heat pump water heater.Traditional centrifugal fan normally volute type structure, relative to the straight axial-flow blower directly gone out, scroll casing type centrifugal blower can change the flow direction of medium in blower fan, but the position of exhaust outlet not only cannot change after determining position also can not again change MEDIA FLOW to, so for the heat pump water heater with cold air function, when normal mode and cold air pattern switch, the flow direction of medium must make a change just can meet consumers' demand, but traditional scroll casing type centrifugal blower to meet such requirement.
Summary of the invention
Based on the volute type structure that current centrifugal fan major part is all one-in-and-one-out, blower interior medium cannot realize secondary commutation.The invention provides a kind of one-in-and-two-out
spiral caseformula centrifugal blower, adopts following a series of innovation means, uses the scroll casing type centrifugal fan structure of an intake grill two exhaust outlets to realize the commutation of blower interior medium secondary when not affecting fan performance.
The technical solution adopted for the present invention to solve the technical problems is: a kind of one-in-and-two-out
spiral caseformula centrifugal blower, comprise spiral case, be contained in the flabellum in described spiral case and drive the flabellum motor of flabellum, offside at flabellum on described spiral case is provided with intake grill, spiral case is inner forms wind chamber in the outside of flabellum, spiral case is provided with the first exhaust outlet and the second exhaust outlet that are mutually angle at the afterbody in wind chamber, spiral case is provided with reversible deflector in the inside in wind chamber, and described reversible deflector can make the first exhaust outlet or the second exhaust outlet and the conducting of wind chamber.
Be further used as the improvement of technical solution of the present invention, one end of described reversible deflector is provided with rocking arm, baffle plate motor described spiral case is equipped with, the rocking arm of reversible deflector is contained on the output shaft of baffle plate motor, baffle plate motor drives reversible deflector to swing in spiral case, and makes the first exhaust outlet or the second exhaust outlet and the conducting of wind chamber.
Be further used as the improvement of technical solution of the present invention, between the first exhaust outlet and the second exhaust outlet, be provided with bearing chamber outside spiral case; rocking arm stretches into bearing chamber through the rocking arm hole on spiral case; the end of rocking arm is provided with axle sleeve; described baffle plate motor is contained on described bearing chamber; the output shaft of baffle plate motor stretches in bearing chamber, and is fixedly connected with the axle sleeve of described rocking arm, bearing is equipped with at the two ends of the inherent axle sleeve of described bearing chamber.
Be further used as the improvement of technical solution of the present invention, described first exhaust outlet is positioned at the top side of spiral case, described second exhaust outlet is positioned at the rear side of spiral case, and the inwall of spiral case is provided with the snail tongue stretched between described first exhaust outlet and wind chamber, and snail tongue has to the curling radian in the first exhaust outlet side.
Be further used as the improvement of technical solution of the present invention, the inwall of described spiral case is equipped with the boss that can coordinate with reversible deflector in the inner side of the first exhaust outlet and the second exhaust outlet.
Be further used as the improvement of technical solution of the present invention, described reversible deflector comprises ABS plastic substrate and is molded over the TPE plastic layer of ABS plastic substrate both sides of the edge, and ABS plastic substrate is provided with some water conservancy diversion strengthening rib, and described water conservancy diversion strengthening rib is arranged along rocking arm direction.
Be further used as the improvement of technical solution of the present invention, described first exhaust outlet and the mutual angle in 90 ° of the second exhaust outlet, the outer end of described first exhaust outlet forms circular ports, and the outside of circular ports is provided with positive stop lug boss, and the outer end of described second exhaust outlet forms the rectangle mouth of pipe.
Be further used as the improvement of technical solution of the present invention, described spiral case comprises the fore shell and back cover that mutually fasten, described fore shell and back cover are provided with the edge of a wing on the edge mutually fastened, along the described edge of a wing, some fastening screw trip bolts are housed, described intake grill is positioned at described fore shell, described flabellum motor is the direct current generator be contained on back cover, and the output shaft of direct current generator is directly connected with flabellum.
Be further used as the improvement of technical solution of the present invention, the outer wall of described fore shell and back cover is equipped with strengthening rib.
Beneficial effect of the present invention: the present invention is a newly-increased exhaust outlet (the first exhaust outlet and the second exhaust outlet) at traditional scroll casing type centrifugal fan air outlet place, two exhaust outlets are mutually angle, for the heat pump water heater with cold air function, when normal mode and cold air pattern switch, the medium of blower interior needs commutation, can be completed by adjustment reversible deflector, this blower fan can be good at the demand meeting machine.The use of reversible deflector on this blower fan of automatic-switching type, not only realizes the secondary commutation demand of centrifugal blower interior media, also maintains the feature of original centrifugal high blast, low noise.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is detonation configuration schematic diagram of the present invention;
Fig. 3 is internal structure axonometric drawing of the present invention;
Fig. 4 is internal structure plan view of the present invention;
Fig. 5 is reversible deflector structural representation of the present invention; .
Embodiment
Referring to figs. 1 through Fig. 5, that show the concrete structure of the preferred embodiment of the present invention.To the structural feature of the present invention each element be described in detail below, and if be described to direction (upper and lower, left and right, before and after) time, be with the structure shown in Fig. 1 for reference to describing, but actual user of the present invention is to being not limited thereto.
The invention provides a kind of one-in-and-two-out
spiral caseformula centrifugal blower, comprise spiral case 1, be contained in the flabellum 2 in described spiral case 1 and drive the flabellum motor 3 of flabellum 2, described spiral case 1 is provided with intake grill 10 at the offside of flabellum 2, described spiral case 1 comprises the fore shell 11 and back cover 12 that mutually fasten, described fore shell 11 and back cover 12 are provided with the edge of a wing 13 on the edge mutually fastened, along the described edge of a wing 13, some fastening screw trip bolts are housed, described intake grill 10 is positioned at described fore shell 11, described flabellum motor 3 is for being contained in the direct current generator on back cover 12, and the output shaft of direct current generator is directly connected with flabellum 2.The outer wall of described fore shell 11 and back cover 12 is equipped with strengthening rib 14.Spiral case 1 inside forms wind chamber 4 in the outside of flabellum 2, spiral case 1 is provided with the first exhaust outlet 15 and the second exhaust outlet 16 at the afterbody in wind chamber 4, described first exhaust outlet 15 is positioned at the top side of spiral case 1, described second exhaust outlet 16 is positioned at the rear side of spiral case 1, the inwall of spiral case 1 is provided with the snail tongue 17 stretched between described first exhaust outlet 15 and wind chamber 4, and snail tongue 17 has to the curling radian in the first exhaust outlet side.Described first exhaust outlet 15 and the mutual angle in 90 ° of the second exhaust outlet 16, the outer end of described first exhaust outlet 15 forms circular ports, and the outside of circular ports is provided with positive stop lug boss 18, and the outer end of described second exhaust outlet 16 forms the rectangle mouth of pipe.Spiral case 1 is provided with reversible deflector 5 in the inside in wind chamber 4, one end of described reversible deflector 5 is provided with Rocker arm 51, baffle plate motor 6(small type stepping motor described spiral case 1 is equipped with), the Rocker arm 51 of reversible deflector 5 is contained on the output shaft of baffle plate motor 6, baffle plate motor 6 drives reversible deflector 5 to swing in spiral case 1, and makes the first exhaust outlet 15 or the second exhaust outlet 16 and wind chamber 4 conducting.The process such as spiral case curve, snail tongue structure, compact wind chamber, the second square exhaust outlet, the first circular exhaust outlet of optimization process can make fan performance maximize and effectively reduce the noise of blower fan;
Between the first exhaust outlet 15 and the second exhaust outlet 16, bearing chamber 7 is provided with; Rocker arm 51 stretches into bearing chamber 7 through the rocking arm hole on spiral case 1; end of Rocker arm 51 is provided with axle sleeve 52; described baffle plate motor 6 is contained on described bearing chamber 7; output shaft of baffle plate motor 6 stretches in bearing chamber 7 outside spiral case 1; and be fixedly connected with the axle sleeve 52 of described Rocker arm 51, bearing 53 is equipped with at the two ends of the inherent axle sleeve 52 of described bearing chamber 7.User sends regulating command by controller, controller sends electrical signal according to the step number set inside program and drives baffle plate motor 6 to rotate, baffle plate motor 6 drives reversible deflector 5, stop operating at the certain step number rear motor of arrival, thus achieve the commutation at this scroll casing type centrifugal fan air outlet place.
The inwall of described spiral case 1 is equipped with the boss 19 that can coordinate with reversible deflector 5 in the inner side of the first exhaust outlet 15 and the second exhaust outlet 16.When reversible deflector 5 closes the first exhaust outlet 15, reversible deflector 5 props up boss 19 and snail tongue 17 simultaneously, described reversible deflector 5 comprises ABS plastic substrate 54 and is molded over the TPE plastic layer 55 of ABS plastic substrate 54 both sides of the edge, ABS plastic substrate 54 is provided with some water conservancy diversion strengthening rib 56, described water conservancy diversion strengthening rib 56 is arranged along rocking arm direction, to reduce noise.The soft TPE material layer 55 of reversible deflector 5 edge quadric injection mould can ensure that under the effect of blast the place that blower interior reversible deflector 5 contacts with the boss 19 at exhaust outlet place is airtight, ensures not leak out, and also eliminates issuable friction noise.
The present invention is a newly-increased exhaust outlet (the first exhaust outlet and the second exhaust outlet) at traditional scroll casing type centrifugal fan air outlet place, two exhaust outlets are mutually angle, for the heat pump water heater with cold air function, when normal mode and cold air pattern switch, the medium of blower interior needs commutation, can be completed by adjustment reversible deflector 5, this blower fan can be good at the demand meeting machine.The use of reversible deflector on this blower fan of automatic-switching type, not only realizes the secondary commutation demand of centrifugal blower interior media, also maintains the feature of original centrifugal high blast, low noise.
Certainly, the invention is not limited to above-mentioned mode of execution, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (9)
1. the scroll casing type centrifugal blower of an one-in-and-two-out, it is characterized in that: comprise spiral case, be contained in the flabellum in described spiral case and drive the flabellum motor of flabellum, offside at flabellum on described spiral case is provided with intake grill, spiral case is inner forms wind chamber in the outside of flabellum, spiral case is provided with the first exhaust outlet and the second exhaust outlet that are mutually angle at the afterbody in wind chamber, spiral case is provided with reversible deflector in the inside in wind chamber, and described reversible deflector can make the first exhaust outlet or the second exhaust outlet and the conducting of wind chamber.
2. the scroll casing type centrifugal blower of one-in-and-two-out according to claim 1, it is characterized in that: one end of described reversible deflector is provided with rocking arm, baffle plate motor described spiral case is equipped with, the rocking arm of reversible deflector is contained on the output shaft of baffle plate motor, baffle plate motor drives reversible deflector to swing in spiral case, and makes the first exhaust outlet or the second exhaust outlet and the conducting of wind chamber.
3. the scroll casing type centrifugal blower of one-in-and-two-out according to claim 2, it is characterized in that: between the first exhaust outlet and the second exhaust outlet, be provided with bearing chamber outside spiral case; rocking arm stretches into bearing chamber through the rocking arm hole on spiral case; the end of rocking arm is provided with axle sleeve; described baffle plate motor is contained on described bearing chamber; the output shaft of baffle plate motor stretches in bearing chamber, and is fixedly connected with the axle sleeve of described rocking arm, bearing is equipped with at the two ends of the inherent axle sleeve of described bearing chamber.
4. the scroll casing type centrifugal blower of the one-in-and-two-out according to Claims 2 or 3, it is characterized in that: described first exhaust outlet is positioned at the top side of spiral case, described second exhaust outlet is positioned at the rear side of spiral case, the inwall of spiral case is provided with the snail tongue stretched between described first exhaust outlet and wind chamber, and snail tongue has to the curling radian in the first exhaust outlet side.
5. the scroll casing type centrifugal blower of one-in-and-two-out according to claim 4, is characterized in that: the inwall of described spiral case is equipped with the boss that can coordinate with reversible deflector in the inner side of the first exhaust outlet and the second exhaust outlet.
6. the scroll casing type centrifugal blower of one-in-and-two-out according to claim 5, it is characterized in that: described reversible deflector comprises ABS plastic substrate and is molded over the TPE plastic layer of ABS plastic substrate both sides of the edge, ABS plastic substrate is provided with some water conservancy diversion strengthening rib, and described water conservancy diversion strengthening rib is arranged along rocking arm direction.
7. the scroll casing type centrifugal blower of one-in-and-two-out according to claim 4, it is characterized in that: described first exhaust outlet and the mutual angle in 90 ° of the second exhaust outlet, the outer end of described first exhaust outlet forms circular ports, the outside of circular ports is provided with positive stop lug boss, and the outer end of described second exhaust outlet forms the rectangle mouth of pipe.
8. the scroll casing type centrifugal blower of the one-in-and-two-out according to claim 1,2 or 3, it is characterized in that: described spiral case comprises the fore shell and back cover that mutually fasten, described fore shell and back cover are provided with the edge of a wing on the edge mutually fastened, along the described edge of a wing, some fastening screw trip bolts are housed, described intake grill is positioned at described fore shell, described flabellum motor is the direct current generator be contained on back cover, and the output shaft of direct current generator is directly connected with flabellum.
9. the scroll casing type centrifugal blower of one-in-and-two-out according to claim 8, is characterized in that: the outer wall of described fore shell and back cover is equipped with strengthening rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510306094.XA CN104963894A (en) | 2015-06-04 | 2015-06-04 | Volute type centrifugal fan with one let and two outlets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510306094.XA CN104963894A (en) | 2015-06-04 | 2015-06-04 | Volute type centrifugal fan with one let and two outlets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104963894A true CN104963894A (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510306094.XA Pending CN104963894A (en) | 2015-06-04 | 2015-06-04 | Volute type centrifugal fan with one let and two outlets |
Country Status (1)
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| CN (1) | CN104963894A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275882A (en) * | 2015-10-21 | 2016-01-27 | 珠海格力电器股份有限公司 | Draught fan, air conditioner and control method of air conditioner |
| CN105805821A (en) * | 2016-06-03 | 2016-07-27 | 浙江昆仑电气有限公司 | Heater and slide rail device thereof |
| CN106196294A (en) * | 2016-08-24 | 2016-12-07 | 中国扬子集团滁州扬子空调器有限公司 | Air channel module and air-conditioner |
| CN106196292A (en) * | 2016-08-24 | 2016-12-07 | 中国扬子集团滁州扬子空调器有限公司 | Improve the air-conditioner of air channel structure |
| CN107477031A (en) * | 2017-09-20 | 2017-12-15 | 四川宇康供水设备有限公司 | A kind of anti-cavitation hydraulic chamber suitable for centrifugal pump |
| CN107525007A (en) * | 2017-10-24 | 2017-12-29 | 李海峰 | A kind of headlight for vehicles assembly and its heat abstractor |
| CN107701512A (en) * | 2017-10-18 | 2018-02-16 | 珠海格力电器股份有限公司 | Spiral case, compressor and air conditioner |
| CN107795517A (en) * | 2017-10-30 | 2018-03-13 | 明达实业(厦门)有限公司 | A kind of air pump with multi-channel structure |
| CN108603514A (en) * | 2015-11-03 | 2018-09-28 | 豪顿涡轮有限公司 | The turbo-compressor only supported by suction flange and outlet(discharge) flange |
| CN108612674A (en) * | 2018-03-22 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of centrifugal blower and air conditioner |
| CN109798256A (en) * | 2019-01-04 | 2019-05-24 | 东莞市旭恒电子有限公司 | A kind of ventilating fan and its usage mode |
| CN110319062A (en) * | 2019-06-14 | 2019-10-11 | 蔡祈坤 | It is a kind of can be from the air blower of Physical temperature-lowering |
| CN110486308A (en) * | 2019-08-22 | 2019-11-22 | 上海氦修网络科技有限公司 | A kind of blower and the car washer with the blower |
| CN112160928A (en) * | 2020-09-28 | 2021-01-01 | 浙江风神风机制造有限公司 | Fan capable of automatically switching air outlets according to temperature |
| CN113074457A (en) * | 2021-04-16 | 2021-07-06 | 瑞美(中国)热水器有限公司 | Heat pump type water heater |
| US11199197B2 (en) | 2019-09-06 | 2021-12-14 | Delta Electronics, Inc. | Centrifugal fan |
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| CN104314880A (en) * | 2014-09-28 | 2015-01-28 | 珠海格力电器股份有限公司 | Centrifugal fan system and air conditioner |
| CN104533833A (en) * | 2014-12-12 | 2015-04-22 | 珠海格力电器股份有限公司 | Multi-duct volute fan and air duct system |
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| JPS5614896A (en) * | 1979-07-16 | 1981-02-13 | Sanden Corp | Blower using centrifugal fan |
| CN202418005U (en) * | 2012-02-12 | 2012-09-05 | 付京斌 | Automatic switching device for air current of local fan |
| CN103727063A (en) * | 2013-12-03 | 2014-04-16 | 山东金阳矿业集团有限公司 | Double-fan air barrel with automatic switchover device |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275882B (en) * | 2015-10-21 | 2018-11-30 | 珠海格力电器股份有限公司 | A kind of blower, air conditioner and its control method |
| CN105275882A (en) * | 2015-10-21 | 2016-01-27 | 珠海格力电器股份有限公司 | Draught fan, air conditioner and control method of air conditioner |
| CN108603514B (en) * | 2015-11-03 | 2020-07-07 | 豪顿涡轮有限公司 | Turbocompressor supported only by inlet and outlet flanges |
| CN108603514A (en) * | 2015-11-03 | 2018-09-28 | 豪顿涡轮有限公司 | The turbo-compressor only supported by suction flange and outlet(discharge) flange |
| US10711800B2 (en) | 2015-11-03 | 2020-07-14 | Howden Turbo Gmbh | Turbo compressor supported only by its inlet and outlet flanges |
| CN105805821A (en) * | 2016-06-03 | 2016-07-27 | 浙江昆仑电气有限公司 | Heater and slide rail device thereof |
| CN105805821B (en) * | 2016-06-03 | 2019-01-25 | 浙江昆仑电气有限公司 | A kind of heater and its railroad |
| CN106196292A (en) * | 2016-08-24 | 2016-12-07 | 中国扬子集团滁州扬子空调器有限公司 | Improve the air-conditioner of air channel structure |
| CN106196294A (en) * | 2016-08-24 | 2016-12-07 | 中国扬子集团滁州扬子空调器有限公司 | Air channel module and air-conditioner |
| CN107477031A (en) * | 2017-09-20 | 2017-12-15 | 四川宇康供水设备有限公司 | A kind of anti-cavitation hydraulic chamber suitable for centrifugal pump |
| CN107701512A (en) * | 2017-10-18 | 2018-02-16 | 珠海格力电器股份有限公司 | Spiral case, compressor and air conditioner |
| CN107525007A (en) * | 2017-10-24 | 2017-12-29 | 李海峰 | A kind of headlight for vehicles assembly and its heat abstractor |
| CN107795517A (en) * | 2017-10-30 | 2018-03-13 | 明达实业(厦门)有限公司 | A kind of air pump with multi-channel structure |
| CN108612674A (en) * | 2018-03-22 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of centrifugal blower and air conditioner |
| CN109798256A (en) * | 2019-01-04 | 2019-05-24 | 东莞市旭恒电子有限公司 | A kind of ventilating fan and its usage mode |
| CN109798256B (en) * | 2019-01-04 | 2024-01-12 | 东莞市旭恒电子有限公司 | Ventilation fan and use mode thereof |
| CN110319062A (en) * | 2019-06-14 | 2019-10-11 | 蔡祈坤 | It is a kind of can be from the air blower of Physical temperature-lowering |
| CN110486308A (en) * | 2019-08-22 | 2019-11-22 | 上海氦修网络科技有限公司 | A kind of blower and the car washer with the blower |
| US11199197B2 (en) | 2019-09-06 | 2021-12-14 | Delta Electronics, Inc. | Centrifugal fan |
| CN112160928A (en) * | 2020-09-28 | 2021-01-01 | 浙江风神风机制造有限公司 | Fan capable of automatically switching air outlets according to temperature |
| CN113074457A (en) * | 2021-04-16 | 2021-07-06 | 瑞美(中国)热水器有限公司 | Heat pump type water heater |
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Application publication date: 20151007 |
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