CN109758624A - A kind of high reliability draft regulator - Google Patents
A kind of high reliability draft regulator Download PDFInfo
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- CN109758624A CN109758624A CN201811647313.0A CN201811647313A CN109758624A CN 109758624 A CN109758624 A CN 109758624A CN 201811647313 A CN201811647313 A CN 201811647313A CN 109758624 A CN109758624 A CN 109758624A
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- negative pressure
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- valve body
- draft regulator
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Abstract
The invention discloses high reliability draft regulators comprising: valve body；Diaphragm type compensates negative pressure regulating mechanism, negative pressure adjusting knob automatically, and diaphragm type compensates negative pressure regulating mechanism automatically and progress negative pressure setting is arranged in valve body and carries out negative pressure induction；On negative pressure adjusting knob setting valve body and diaphragm type is driven to compensate negative pressure regulating mechanism automatically；The negative pressure indicator for indicating negative pressure value is provided with according to negative pressure adjusting knob rotation position between the negative pressure adjusting knob and valve body.Draft regulator provided by the invention realizes the function of negative pressure indicator using negative pressure adjusting knob position and scale；Simultaneously negative pressure regulating mechanism is compensated not only when negative pressure setting device using diaphragm type automatically, but also make negative pressure sensing device, degree of regulation and reliability is effectively ensured.
Description
Technical field
The present invention relates to pressure regulation technologies, and in particular to a kind of draft regulator.
Background technique
In medical and clinical therapy field, currently used blowdown or exclusion body fluid protocol are the methods for using vacuum suction.
With the continuous renewal of Medical Devices, Electric negative pressure aspirator is gradually by naughty state, and wall type vacuum extractor is due to application side
Just and it is not take up ground space, it is commonly used in the whole nation.Wall type vacuum extractor is to pass through the negative pressure gas source in terminal
Pressure stabilizing regulating mechanism carries out the regulating device of negative pressure and flow control, then is used for clinical fluid after forming attraction system with liquid-collecting bottle
Attract and use, can satisfy the use of clinical (respiratory tract, the oral cavity, operation) vacuum suction of general curative.
Draft regulator structure composition mainly includes that runner integrates parent, switching knob, vacuum meter and voltage-stablizer etc. at present
Component, structural principle are as shown in Figure 1.Negative pressure source is introduced by negative pressure source connector, and switching switch is pushed open position, is switched at this time
Negative pressure source runner is connected the U-type groove of knob bottom with the upper parent centre bore runner of installation pressure regulator, and output negative pressure value passes through
It blocks inlet end and is adjusted using pressure regulator.Pressure regulator side-lower is then towards the logical of draft regulator output screw thread mouth
Road, vacuum table and tonifying Qi hole runner are communicated with inlet end runner, for showing draft regulator in the negative pressure value of inlet end, tonifying Qi
Kong Ze is used to extraneous gas import adjuster inlet end, and cooperation adjuster is completed negative pressure and adjusted.
Thus in the cost of the draft regulator constituted, common vacuum table accounting nearly 1/3, vacuum micromanometer cost is very
To accounting for the 1/2 of equipment cost.And the elastic sensing element of pressure gauge is such as shaken and external force will affect its accuracy and return
The performances such as difference, maintenance and replacement cost are very high, and the components volume such as vacuum table scale and bourdon tube is larger in addition, leads to negative pressure
Adjuster entirety figure is huge, and aesthetics is poor.
To ensure patient safety, patient is not injured, clinically has very high requirement to the negative pressure value of output.Especially similar
The operation application field such as throat and thoracic cavity, excessively high negative pressure can cause irreversible injury to patient, and because adjusting pressuring knob rotates
Random larger, easy to operate by mistake to cause moment negative pressure value excessive, risk is higher, and safety is poor.
Summary of the invention
For the problems of existing draft regulator, a kind of new draft regulator scheme is needed.
For this purpose, not using vacuum table, and property the purpose of the present invention is to provide a kind of high reliability draft regulator
It can be reliable and stable.
In order to achieve the above object, high reliability draft regulator provided by the invention, comprising:
Valve body；
Diaphragm type compensates negative pressure regulating mechanism automatically, and the diaphragm type compensates negative pressure regulating mechanism automatically and is arranged in valve body
It carries out negative pressure setting and carries out negative pressure induction；
Negative pressure adjusting knob, the negative pressure adjusting knob, which is arranged on valve body and diaphragm type is driven to compensate negative pressure automatically, adjusts machine
Structure；The negative pressure for indicating negative pressure value is provided with according to negative pressure adjusting knob rotation position between the negative pressure adjusting knob and valve body
Indicator.
Further, the diaphragm type compensate automatically in negative pressure regulating mechanism include adjustment axis, adjusting set, pressure spring,
Diaphragm unit and valve rod, the adjustment axis are connect with negative pressure adjusting knob, and can be rotated with negative pressure adjusting knob；The tune
Section set is spirally connected with adjustment axis, and the position-limit mechanism for preventing adjusting set from rotating with setting cooperates, and the rotation of adjustment axis will drive adjusting
Set moves in a straight line；One end of the valve rod is threaded through in adjusting set, and the other end can be matched by sealing ring with the valve port on valve body
It closes and forms sealing；The pressure spring is set on valve rod, and between valve rod and adjusting set, both ends respectively with valve rod one
End and adjusting set abut, and are in preloading condition, and when adjusting set moves in a straight line, the decrement of pressure spring can constantly become
Change, the power acted on valve rod also constantly changes；The diaphragm unit is arranged on valve rod, and matches with the sealing of valve body uuper valve chamber
It closes；
The adjustment axis then drives adjusting set to move in a straight line with the rotation of negative pressure adjusting knob, and adjusting set moves in a straight line
When, the decrement of pressure spring will be adjusted, then makes valve rod that diaphragm unit can be driven mobile relative to valve chamber, the moving process
The diaphragm equivalent forced area in diaphragm unit and the valve port area on valve body will be made to change.
Further, the negative pressure indicator is by being arranged in negative pressure scale value between negative pressure adjusting knob and valve body and referring to
Indicating will is constituted.
Further, the diaphragm in the diaphragm unit is the revolving body with centre bore, and with annular projection and groove.
Further, also set up in the draft regulator by a straight-through valve group, can input terminal runner on valve body with it is defeated
Outlet runner is directly connected without valve chamber.
Further, the straight-through valve group includes that the connection that input terminal runner and output end runner are connected on valve body is arranged in
Chamber, is arranged in the straight-through adjusting valve bar in connection connecting cavity, reset spring and button, and the straight-through adjusting valve bar is threaded
Column, one end is external screw thread, and other end band installs the groove of O-ring seals, and has a word open-end wrench position；Button and straight
Logical regulating valve stem is threadedly coupled, and is provided with sealing ring on button, and reset spring is set on straight-through adjusting valve bar, both ends respectively with
Step and button in valve body connecting cavity abut；Button and reset spring cooperate, and drive straight-through adjusting valve bar in connecting cavity
Movement, while the O-ring seals on straight-through adjusting valve bar play position-limiting action simultaneously, by input terminal runner and output end runner
It separates, is also prevented from the components such as valve rod and button and deviates from from valve body.
Further, the limit assembly that limitation negative pressure adjusting knob excessively rotates is additionally provided in the draft regulator.
Draft regulator provided by the invention realizes the function of negative pressure indicator using negative pressure adjusting knob position and scale
Energy；Simultaneously negative pressure regulating mechanism is compensated not only when negative pressure setting device using diaphragm type automatically, but also make negative pressure sensing device, effectively protected
Demonstrate,prove degree of regulation and reliability.
Meanwhile draft regulator stability provided by the invention is more excellent, manufacturing cost is lower, and Product Safety is more
It is high.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is existing draft regulator structure principle chart；
Fig. 2 is the schematic diagram of negative pressure indicator in present example；
Fig. 3 is the structural schematic diagram of draft regulator in present example；
Fig. 4 is the decomposition diagram of draft regulator in present example；
Fig. 5 is valve rod Force principle figure in draft regulator in present example；
Fig. 6 is that draft regulator direct mode operation opens (logical) status diagram in present example；
Fig. 7 is that draft regulator direct mode operation closes (disconnected) status diagram in present example.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
The draft regulator provided in this example does not use vacuum table, but for the effective principle of Safe of Medical Device, negative pressure
Output valve must show and monitor.In the draft regulator structure that this example provides, negative pressure adjusting knob position and scale are used
To realize the function of negative pressure indicator.
Meanwhile negative pressure regulating mechanism is compensated automatically using diaphragm type in the draft regulator structure of this example offer, it is adjusting
Required negative pressure scale value is set in section knob outer plate surface as required, arrow is set on valve body, and knob indicating positions exists
It is locked after verification, it is ensured that it is suitable with vacuum table measuring accuracy that precision is arranged in negative pressure.
Furthermore the diaphragm type in the draft regulator structure that this example provides compensates negative pressure regulating mechanism automatically and both works as negative pressure
Device is set, and makees negative pressure sensing device, thus using can directly be closed by the way that knob high scale value is corresponding with the arrow on valve body
System, directly setting output negative pressure value.
Referring to Fig. 3 and Fig. 4 which shows based on the above principles, a kind of structure for draft regulator that this example provides is shown
Example.
As seen from the figure, this draft regulator is mainly by knob (1), front cover (2), adjustment axis (3), adjusting set (4), pressure regulation bullet
Spring (5), valve deck (6), diaphragm (7), valve body (8), button (9), valve rod (10), preceding valve rod (11), membrane baffle (12), rear valve rod
(13), open washer (14) and dial (15), which cooperate, is constituted.
Wherein, knob (1) is the multi-step column with inner hole, and exterior contour is set by theoretical basis of ergonomics
It counts, uniformly distributed three threaded holes on circumference, interior side is counterbore, and the other side is rectangular tongue-and-groove, is communicated with through hole.
Front cover (2) is the cuboid with turned cavities, and inside contains threaded hole in hollow cover shape, top tape groove, inside grooves,
There are boss and through hole in center, and the threaded hole of bottom surface four is for positioning.
Adjustment axis (3) is the column with turned cavities, and big end is external screw thread, and small end is rectangular tongue-and-groove, and internal one end is
Counterbore, center are run through with threaded hole.
Adjusting set (4) is the revolving body with step inner cavity, and one end is internal screw thread, and the other end is stepped hole, and penetrates ring
The radial screw bore of shape.
Pressure spring (5) is standard cylindrical spring.
Valve deck (6) is the cuboid with step inner cavity, and there is through-hole in the position at four angles, and two sides are round boss, interior
Portion is stepped hole, and there are two grooves on center hole.
Diaphragm (7) is the revolving body with centre bore, band annular projection and groove.
Valve body (8) is the cuboid with step inner cavity, and the position of lower end surface quadrangle is through-hole, and four, top face is beaten
Hole, remaining is all screw hole in addition to a counterbore, and inside is stepped hole, and central bore is connected to top radial hole, and top is obstructed, separately
There are annular cavity and aperture also to communicate with gas outlet.
Button (9) is tapped column, and big end side does concave configuration, meets ergonomic design, small end
Side band installs the groove of O-ring seals (20), and has threaded hole.
Valve rod (10) is threaded column, and one end is external screw thread, and other end band installs the ditch of O-ring seals (22)
Slot, and have a word open-end wrench position.
Preceding valve rod (11) is threaded six face cylinder, and one end is hex wrench position, and head band installs O-ring seals
(23) groove, the other end are external screw thread.
Membrane baffle (12) is the revolving body with centre bore, top tape annular boss.
Valve rod (13) is column with threaded hole afterwards, and big end side has groove, and small end side is threaded hole.
Open washer (14) is the ring bodies of rectangular cross section, one side band open slot.
Dial (15) is the revolving body of internal with groove, and big end side band boss, groove, small end side boss are arranged at bottom
Band groove and the conical surface, center is through hole.
The component of such structure, when constituting draft regulator, knob (1) is interior by tongue-and-groove and adjustment axis (3) one end
The tenon of screw thread is fixed by screw (16), drives adjustment axis to make rotating motion by rotation knob.
Adjustment axis (3) big end is threadedly coupled with adjusting set (4), hexagon socket cap head screw (19) be fixed on adjusting set it
On, position-limit mechanism is formed with the groove of valve deck (6), prevents adjusting set from rotating.Therefore, the rotation of adjustment axis will drive adjusting set and do
Linear motion.
Pressure spring (5) one end is withstood on rear valve rod (13), and the other side is on adjusting set (4) step, when adjusting set is done
When linear motion, the decrement of spring can constantly change, and the power acted on rear valve rod also constantly changes.
Valve rod (13) is threadedly coupled with preceding valve rod (11) afterwards, and diaphragm pressing plate (24), diaphragm (7) and membrane baffle (12) are pressed from both sides
It fastens, preceding valve rod and membrane baffle end face seal, head are formed by O-ring seals (23) and valve body (8) and sealed.Valve rod afterwards
One side trench of big end is sequentially placed elastic spring (25) and open washer (14), increases damping by way of increasing frictional force,
Substantially the oscillation phenomenon of regulating valve can be eliminated.
Dial (15) small end boss and knob (1) groove cooperate, and are fixed by three holding screws (17), simultaneously
Dial small end boss side band groove and the conical surface act on the tightening of screw more efficient, to realize knob and scale
Disk rotates together.The bottom with groove of dial constitutes position limiting structure with the screw (18) being mounted on front cover (2), ensure that
Knob and dial can only rotate 3/4 circle, effectively prevent medical worker's maloperation, and the setting of repair process negative pressure value is excessively high, causes
Malpractice.
Button (9) is threadedly coupled with valve rod (10), installs O-ring seals (20) in button groove, and O is installed in valve rod groove
Shape sealing ring (22), prevents gas from leaking.The button active force upward by reset spring (21), band ovable valve stem form upward fortune
Dynamic trend, O-ring (22) play position-limiting action simultaneously, valve air inlet/outlet are separated, and are also prevented from zero, valve rod and button etc.
Part abjection from valve body (8).
Thus the draft regulator constituted, diaphragm type therein compensate negative pressure regulating mechanism automatically and mainly pass through adjusting by rear
The stress on valve rod that valve rod (13) and preceding valve rod (11) connect and compose is adjusted to complete to compensate negative pressure automatically.
Referring to Fig. 5 which shows the force diagram in this example draft regulator on valve rod.
As seen from the figure, return spring force:
Fs=kx (k is stiffness coefficient, and x is length variable quantity)；
Active force of the atmospheric pressure to diaphragm:
F0=P0·A2 (A2For diaphragm equivalent forced area, P0For absolute pressure)；
Active force of the admission pressure to valve rod:
F1=P1·A1 (A1For valve port area, P1For absolute pressure)；
Active force of the outlet pressure to diaphragm:
F2=P2·(A2-A1) (A2For diaphragm equivalent forced area, A1For valve port area, P2For absolute pressure)；
Assuming that ignore frictional resistance, stress balance equation are as follows:
F0=Fs+F1+F2 ——(1)
That is: F2=F0-Fs-F1 ——(2)
By parameter substitution formula (2)
That is: P2·(A2-A1)=P0·A2-k·x-P1·A1——(3)；
Arrangement can obtain: P2=(P0·A2-k·x-P1·A1)/(A2-A1)。
Due under same operating, it is believed that atmospheric pressure and admission pressure are constant, i.e. P0, P1It is constant, and
Its stiffness coefficient k is also constant after spring is selected, according to formula (3) it was determined that influencing the mainly valve port face of outlet pressure variation
Product A1And diaphragm equivalent forced area A2With length variable quantity x.
And overleaf in the structure of draft regulator, adjustment axis (3) rotation is driven by turning knob (1), is driven with this
Adjusting set (4) moves in a straight line, and causes the variation of spring (5) decrement x, while appropriate increase diaphragm area A2, reduce valve port
Area A1, outlet pressure P2Stability increase.
In use, negative pressure source, by valve body (8) side access device, gas successively enters annular chamber through runner Qf5, Qf4
Qf3, then vacuum suction is completed through Qf2, Qf1, communicating with inlet end runner Qf5 is tonifying Qi hole runner Qf6, and tonifying Qi hole is on the one hand
Cooperate vacuum extractor to carry out negative pressure adjusting, in addition also prevent under failure mode that negative pressure value is excessive, ensure that medical instrument
Securely and reliably.
Referring to fig. 2, required negative pressure scale value is marked on the dial in this draft regulator (15) panel, in valve body
(8) arrow is set on, and dial indicating positions is locked it with knob (1) using holding screw (17) after verification, both
It ensure that knob and dial rotate synchronously, while ensuring that negative pressure setting precision is suitable with vacuum table measuring accuracy, to use
The arrow corresponding relationship in knob high scale value and valve body, setting output negative pressure value can directly be passed through.
This draft regulator does not use vacuum table, and negative pressure indicator function is realized using negative pressure adjusting knob position and scale
The draft regulator of energy, range of regulation can be realized by the way that different spring rates is arranged, and be adopted in example as shown in Figure 2
With the specification of 0~70mmHg.The knob of adjuster can only rotate 3/4 circumference, effectively prevent medical worker's maloperation, repair process
Negative pressure value setting is excessively high, causes malpractice, while the present invention increases a straight-through function, can by the input terminal runner of valve with it is defeated
Outlet runner fast conducting meets emergency demand clinically.
Furthermore it is additionally provided with high-speed switch in this draft regulator, in operating process, as long as pressing lower button (9), overcomes bullet
The elastic force of spring (21) acts on, and the input terminal runner Qf1 of valve and output end runner Qf5 fast conducting can be formed straight-through function
(as shown in Figure 6).
When release button, under the effect of reset spring elastic force, button will drive valve rod (10) reset, input terminal runner Qf1
Quickly separated (as shown in Figure 7) with output end runner Qf5.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. high reliability draft regulator characterized by comprising
Valve body；
Diaphragm type compensates negative pressure regulating mechanism automatically, and the diaphragm type compensates negative pressure regulating mechanism setting automatically and carries out in valve body
Negative pressure setting and progress negative pressure induction；
Negative pressure adjusting knob, the negative pressure adjusting knob are arranged on valve body and diaphragm type are driven to compensate negative pressure regulating mechanism automatically；
It is provided between the negative pressure adjusting knob and valve body according to negative pressure adjusting knob rotation position and indicates that the negative pressure of negative pressure value refers to
Show device.
2. high reliability draft regulator according to claim 1, which is characterized in that the diaphragm type compensates negative pressure automatically
It include adjustment axis, adjusting set, pressure spring, diaphragm unit and valve rod in regulating mechanism, the adjustment axis and negative pressure, which are adjusted, revolves
Button connection, and can be rotated with negative pressure adjusting knob；The adjusting set is spirally connected with adjustment axis, and prevents adjusting set from rotating with setting
Position-limit mechanism cooperation, the rotation of adjustment axis will drive adjusting set and move in a straight line；One end of the valve rod is threaded through in adjusting set,
The other end can cooperatively form sealing with the valve port on valve body by sealing ring；The pressure spring is set on valve rod, and is located at
Between valve rod and adjusting set, both ends are abutted with one end of valve rod and adjusting set respectively, and are in preloading condition, when adjusting set is done
When linear motion, the decrement of pressure spring can constantly change, and the power acted on valve rod also constantly changes；The diaphragm group
Part is arranged on valve rod, and seals and cooperate with valve body uuper valve chamber；
The adjustment axis then drives adjusting set to move in a straight line with the rotation of negative pressure adjusting knob, will when adjusting set moves in a straight line
The decrement for adjusting pressure spring then makes valve rod that diaphragm unit can be driven mobile relative to valve chamber, which will make
The valve port area obtained on diaphragm equivalent forced area and valve body in diaphragm unit changes.
3. high reliability draft regulator according to claim 1, which is characterized in that the negative pressure indicator is by being arranged in
Negative pressure scale value and Warning Mark are constituted between negative pressure adjusting knob and valve body.
4. high reliability draft regulator according to claim 2, which is characterized in that the diaphragm in the diaphragm unit is
Revolving body with centre bore, and with annular projection and groove.
5. high reliability draft regulator according to claim 1, which is characterized in that also set up in the draft regulator
By a straight-through valve group, can the input terminal runner on valve body be directly connected with output end runner without valve chamber.
6. high reliability draft regulator according to claim 5, which is characterized in that the straight-through valve group includes that setting exists
It is connected to the connecting cavity of input terminal runner and output end runner on valve body, the straight-through adjusting valve bar in connection connecting cavity is set, it is multiple
Position spring and button, the straight-through adjusting valve bar are threaded column, and one end is external screw thread, and other end band installs O shape
The groove of sealing ring, and have a word open-end wrench position；Button is threadedly coupled with straight-through adjusting valve bar, and sealing is provided on button
Circle, reset spring is set on straight-through adjusting valve bar, both ends respectively in valve body connecting cavity step and button abut；Button
Cooperate with reset spring, drives straight-through adjusting valve bar to move in connecting cavity, while the O-ring seals on straight-through adjusting valve bar are same
When play position-limiting action, input terminal runner and output end runner are separated, are also prevented from the components such as valve rod and button from valve body
Middle abjection.
7. high reliability draft regulator according to claim 1, which is characterized in that also set up in the draft regulator
The limit assembly that restricted negative pressure adjusting knob excessively rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811647313.0A CN109758624B (en) | 2018-12-30 | 2018-12-30 | High-reliability negative pressure regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811647313.0A CN109758624B (en) | 2018-12-30 | 2018-12-30 | High-reliability negative pressure regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109758624A true CN109758624A (en) | 2019-05-17 |
| CN109758624B CN109758624B (en) | 2022-07-01 |
Family
ID=66453301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811647313.0A Active CN109758624B (en) | 2018-12-30 | 2018-12-30 | High-reliability negative pressure regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109758624B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193451A1 (en) * | 2021-03-15 | 2022-09-22 | 蒋亮健 | Manual-adjustment-type device for adjusting swing angle of electric fan according to identifications |
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| CN202972068U (en) * | 2012-11-27 | 2013-06-05 | 凯迈（洛阳）气源有限公司 | Oxygen pressure reducer |
| CN207437916U (en) * | 2017-11-23 | 2018-06-01 | 新疆回水环保新材料有限公司 | A kind of steam autocontrol valve for semi-coke raw material |
| CN108799583A (en) * | 2018-08-27 | 2018-11-13 | 成都川力智能流体设备股份有限公司 | A kind of pressure reducing valve feedback gas balancer |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1401614A (en) * | 1971-07-06 | 1975-07-16 | British Oxygen Co Ltd | Pressure-reducing gas-flow regulator valves |
| CN2262147Y (en) * | 1995-12-09 | 1997-09-10 | 中外合资浙江新益空压机有限公司 | Pressure reducing valve |
| CN1837662A (en) * | 2006-04-17 | 2006-09-27 | 清华大学 | Powerless mechanical feedback type automatic adjustment valve of air-feed flow |
| CN101990655A (en) * | 2007-04-20 | 2011-03-23 | 费希尔控制产品国际有限公司 | Integral overpressure monitoring device |
| CN201539611U (en) * | 2009-10-20 | 2010-08-04 | 张亚东 | Visual adjusting automatic water replenishing valve |
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| CN207437916U (en) * | 2017-11-23 | 2018-06-01 | 新疆回水环保新材料有限公司 | A kind of steam autocontrol valve for semi-coke raw material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193451A1 (en) * | 2021-03-15 | 2022-09-22 | 蒋亮健 | Manual-adjustment-type device for adjusting swing angle of electric fan according to identifications |
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| Publication number | Publication date |
|---|---|
| CN109758624B (en) | 2022-07-01 |
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Address after: No. 499 Wenji Road, Songjiang District, Shanghai, 201616 Applicant after: GENTEC (SHANGHAI) Corp. Address before: 201600 No. 1988, Yushu Road, Shanghai, Songjiang District Applicant before: GENTEC (SHANGHAI) Corp. |
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