CN207589212U - Power input assembly, electromagnetic heating device and induction cooker - Google Patents
Power input assembly, electromagnetic heating device and induction cooker Download PDFInfo
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- CN207589212U CN207589212U CN201721848145.2U CN201721848145U CN207589212U CN 207589212 U CN207589212 U CN 207589212U CN 201721848145 U CN201721848145 U CN 201721848145U CN 207589212 U CN207589212 U CN 207589212U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 230000006698 induction Effects 0.000 title 1
- 230000005611 electricity Effects 0.000 claims description 22
- 239000013081 microcrystal Substances 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a power input subassembly, electromagnetic heating device and electromagnetism stove, wherein, the power input subassembly includes: the circuit board is provided with a live wire and a zero line, and the live wire is connected with a differential mode inductor in series; and the live wire and the zero wire are crossed at the position of the differential mode inductor. The utility model provides a power input subassembly, electric heater unit and electromagnetism stove can solve current power input subassembly and receive the interference of electromagnetic wave and then influence the problem of municipal electric network stability more easily.
Description
Technical field
The utility model is related to a kind of circuit engineering more particularly to power input component, electric heater unit and electromagnetic ovens.
Background technology
The small kitchens household electrical appliances such as electric cooker, electric pressure cooking saucepan, electromagnetic oven have become article indispensable in huge numbers of families,
Its common ground is that inside is both provided with electrical heating elements.By controlling the heating power of electrical heating elements, heating speed can be adjusted
Degree.
By taking electromagnetic oven as an example, electromagnetic oven includes：Housing and microcrystal face plate, microcrystal face plate are arranged on the top of housing, are used for
Carry cookware.Coil panel is equipped in housing as electrical heating elements.Coil panel passes through power input component and externally fed power supply
It is connected, to receive the driving electrical heating elements work of 220V Alternating Current Power Supplies.220V AC rectifications are in direct current by power input component
Then electricity is converted into high-frequency, high current signal by high-frequency inverter, emit electromagnetic wave for driving coil disk, with to pot
Tool is heated.But the electromagnetic wave that coil panel is sent out can also generate coupled interference to the inside cabling of electromagnetic oven.
Power input component includes：Circuit board, longer length is usually laid on circuit board and the firewire that is mutually parallel and
Zero curve, it is easier to be interfered by electromagnetic wave, and the longer interference being subject to of length of arrangement wire is more serious.Interference signal passes through zero curve
It is conducted with firewire into electricity network, can also influence the normal work of other electrical appliances.
Utility model content
The utility model provides a kind of power input component, electric heater unit and electromagnetic oven, for solving existing power supply
The problem of input module is easier to the interference by electromagnetic wave and then influences electricity network stability.
The utility model first aspect provides a kind of power input component, including：Circuit board is provided on the circuit board
Firewire and zero curve concatenate differential mode inductance in the firewire；The firewire and zero curve intersect at the position of the differential mode inductance.
Power input component as described above, the firewire include：First Line section and the second part of path；The First Line
Section is used to receive external power supply；The differential mode inductance is connected between First Line section and the second part of path；
The zero curve includes：Tertiary circuit section, the 4th part of path and the 5th part of path being sequentially connected；The tertiary circuit
Section is used to receive external power supply；
The tertiary circuit section is parallel with First Line section, and the 5th part of path is parallel with the second part of path；4th line
It arranges with differential mode inductance along perpendicular to the direction of circuit board surface in section.
Power input component as described above, the 4th part of path is between the differential mode inductance and circuit board.
Power input component as described above, second part of path are conllinear with the extending direction of tertiary circuit section.
Power input component as described above, the 5th part of path are conllinear with the extending direction in First Line section.
The utility model second aspect provides a kind of power input component, including：Circuit board is provided on the circuit board
Firewire and zero curve concatenate differential mode inductance in the zero curve；The firewire and zero curve intersect at the position of the differential mode inductance.
Power input component as described above, the zero curve include：First Line section and the second part of path；The First Line
Section is used to receive external power supply；The differential mode inductance is connected between First Line section and the second part of path；
The firewire includes：Tertiary circuit section, the 4th part of path and the 5th part of path being sequentially connected；The tertiary circuit
Section is used to receive external power supply；
The tertiary circuit section is parallel with First Line section, and the 5th part of path is parallel with the second part of path；4th line
It arranges with differential mode inductance along perpendicular to the direction of circuit board surface in section.
Power input component as described above, the 4th part of path is between the differential mode inductance and circuit board.
The utility model third aspect provides a kind of electromagnetic heater, including：Electrical heating elements and electricity as described above
Source input module；The electrical heating elements are electrically connected with the power input component.
The utility model fourth aspect provides a kind of electromagnetic oven, including：Housing, the microcrystal face plate for being arranged on case top；
Electromagnetic heater as described above is provided in the housing.
Technical solution provided by the utility model by setting firewire and zero curve on circuit boards, and concatenates in firewire
Differential mode inductance, and firewire and zero curve is made to intersect at the poor position of differential mode inductance, the common mode interference signal at crossover location both ends
It cancels out each other, reduces the common-mode signal interference for entering electricity network by power input component.In addition, using differential mode inductance also
The DM EMI between firewire and zero curve can be eliminated, further reduces the difference for entering electricity network by power input component
Mould signal interference improves the Products Compatibility energy of electromagnetic oven.
Description of the drawings
Attached drawing herein is incorporated into specification and forms the part of this specification, shows and meets the utility model
Embodiment, and for explaining the principle of the utility model together with specification.
Fig. 1 is the structure diagram of power input component that the utility model embodiment one provides.
Reference numeral：
1- circuit boards；2- firewires；
21- First Lines section；The second part of paths of 22-；
3- zero curves；31- tertiary circuit sections；
The 4th part of paths of 32-；The 5th part of paths of 33-；
4- differential mode inductances.
Pass through above-mentioned attached drawing, it has been shown that the specific embodiment of the utility model will be hereinafter described in more detail.These
Attached drawing and word description are not intended to the range for limiting the utility model by any mode and conceiving, but by reference to specific
Embodiment illustrates the concept of the utility model for those skilled in the art.
Specific embodiment
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, those of ordinary skill in the art's all other embodiments obtained without making creative work, belongs to
The range of the utility model protection.
Embodiment one
The present embodiment provides a kind of power input component, available for that in the electrical heating utensil such as electromagnetic oven, can reduce to city
The interference of electric network.The present embodiment is described in detail the realization method of power input component by taking electromagnetic oven as an example.Electromagnetic oven
Employed in electrical heating elements be coil panel.
Fig. 1 is the structure diagram of power input component that the utility model embodiment one provides.As shown in Figure 1, this reality
It applies example and a kind of power input component is provided, including：Circuit board 1 is provided with firewire 2 and zero curve 3 on circuit board 1, is concatenated in firewire 2
Differential mode inductance 4.Firewire 2 and zero curve 3 intersect at the position of differential mode inductance 4.
The firewire 2 and zero curve 3 set on circuit board 1 is used to be connected with external power supply.There are two connect for the tool of differential mode inductance 4
End, concatenates into firewire 2.At the position of differential mode inductance 4, firewire 2 and zero curve 3 are intersected.
The electromagnetic wave that coil panel generates can promote firewire and zero curve to generate common mode interference.Firewire 2 and the intersection of zero curve 3 are set
It puts, then since firewire 2 and zero curve 3 are intersecting front and rear polarity on the contrary, the polarity of the equivalent capacity formed is on the contrary, then intersect position
The common mode interference signal for putting front-end and back-end is cancelled out each other.
Technical solution provided in this embodiment, by setting firewire and zero curve on circuit boards, and concatenation is poor in firewire
Mould inductance, and firewire and zero curve is made to intersect at the poor position of differential mode inductance, the common mode interference signal phase at crossover location both ends
It mutually offsets, reduces the common-mode signal interference for entering electricity network by power input component.It in addition, can also using differential mode inductance
The DM EMI between firewire and zero curve is enough eliminated, further reduces the differential mode for entering electricity network by power input component
Signal interference improves the Products Compatibility energy of electromagnetic oven.
Embodiment two
The present embodiment is on the basis of above-described embodiment, and power input component is optimized, especially to 2 He of firewire
The mode of 3 arranged crosswise of zero curve is further optimized.
As shown in Figure 1, be described in detail for the ease of the interleaved mode to firewire 2 and zero curve 3, in the present embodiment, fire
Line 2 includes：21 and second part of path 22 of First Line section, wherein, First Line section 21 is used to receive external power supply.Second circuit
Section 22 is used to be connected with subsequent conditioning circuit, such as：Rectification circuit (not shown).
Differential mode inductance 4 is connected between 21 and second part of path 22 of First Line section.Specifically, differential mode inductance 4 has two
A connecting pin is connected respectively with 21 and second part of path 22 of First Line section.
Zero curve 3 includes：Tertiary circuit section 31, the 4th part of path 32 and the 5th part of path 33 being sequentially connected, wherein, third
For receiving external power supply, the 5th part of path 33 is used to be connected with subsequent conditioning circuit part of path 33, such as：Rectification circuit is (in figure not
It shows).The second part of path 22 and the 5th part of path 33 is equivalent to two input terminals of rectification circuit to be connected.
Tertiary circuit section 31 is parallel with First Line section 21, and is sticked on the surface of circuit board 1.5th part of path 33 and
Two part of paths 22 are parallel, and are sticked on the surface of circuit board 1." being sticked " herein does not indicate that manufacturing process is stickup or other,
And representing that each part of path is the copper sheet for being formed in 1 surface of circuit board, thickness is smaller, is equivalent to and is adjacent on the surface of circuit board 1
On.
4th part of path 32 is arranged with differential mode inductance 4 along perpendicular to the direction on 1 surface of circuit board, i.e.,：From along perpendicular to electricity
On the direction on 1 surface of road plate, the 4th part of path 32 is located at the top of differential mode inductance 4, is equivalent to the 4th part of path 32 from differential mode electricity
Sense 4 top across.Alternatively, the 4th part of path 32 is located at the lower section of differential mode inductance 4.In the present embodiment, the 4th part of path 32
Between differential mode inductance 4 and circuit board 1 namely：From along on the direction on 1 surface of circuit board, the 4th part of path 32 is located at
The lower section of differential mode inductance 4.
Technical solution provided in this embodiment, by setting firewire and zero curve on circuit boards, and concatenation is poor in firewire
Mould inductance, and firewire and zero curve is made to intersect at the poor position of differential mode inductance, the common mode interference signal phase at crossover location both ends
It mutually offsets, reduces the common-mode signal interference for entering electricity network by power input component.It in addition, can also using differential mode inductance
The DM EMI between firewire and zero curve is enough eliminated, further reduces the differential mode for entering electricity network by power input component
Signal interference improves the Products Compatibility energy of electromagnetic oven.
Embodiment three
The present embodiment is on the basis of above-described embodiment, and power input component is optimized, especially to 2 He of firewire
The mode of 3 arranged crosswise of zero curve is further optimized.
According to the wires design of circuit board 1, above-mentioned First Line section 21 is parallel with tertiary circuit section 31, the second part of path 22
It is parallel with the 5th part of path 33.And can be parallel between First Line section 21 and the second part of path 22, can also be in certain angle
Degree.
In the present embodiment, the second part of path 22 is conllinear with the extending direction of tertiary circuit section 31, the 5th part of path 33 and
The extending direction of one part of path 21 is conllinear.
From the point of view of the viewing angles of Fig. 1, tertiary circuit section 31 is located at 21 top of First Line section, and the two is arranged in parallel.
The right end in First Line section 21 is connected with one end of differential mode inductance 4, and the other end of differential mode inductance 4 is connected with the second part of path 22,
Second part of path 22 is conllinear with the extending direction of tertiary circuit section 31.
The right end of tertiary circuit section 31 is connected with the 4th part of path 32, and the 4th part of path 32 is located at the bottom of differential mode inductance 4
And extend to the right, then it is connected with the 5th part of path 33, the extending direction of the 5th part of path 33 and First Line section 21 are common
Line.
Certainly, other than the said program that the present embodiment is provided, the second part of path 22 can be with tertiary circuit section 31
Between in set angle, and between the 5th part of path 33 and First Line section 21 be in set angle.
Alternatively, the distance between First Line section 21 and tertiary circuit section 31 and the second part of path 22 and the 5th part of path 33
The distance between it is unequal, i.e.,：From the point of view of the viewing angles of Fig. 1, the second part of path 22 is higher or lower than tertiary circuit section 31, the
Five part of paths 33 are higher or lower than First Line section 21.
Technical solution provided in this embodiment, by setting firewire and zero curve on circuit boards, and concatenation is poor in firewire
Mould inductance, and firewire and zero curve is made to intersect at the poor position of differential mode inductance, the common mode interference signal phase at crossover location both ends
It mutually offsets, reduces the common-mode signal interference for entering electricity network by power input component.It in addition, can also using differential mode inductance
The DM EMI between firewire and zero curve is enough eliminated, further reduces the differential mode for entering electricity network by power input component
Signal interference improves the Products Compatibility energy of electromagnetic oven.
Example IV
The present embodiment provides another power input components, can be applied in the electrical heating utensil such as electromagnetic oven.This implementation
Example illustrates the realization method of power input component only by taking electromagnetic oven as an example.
Power input component provided in this embodiment includes：Circuit board, is provided with firewire and zero curve on circuit board, in zero curve
Concatenate differential mode inductance.Firewire and zero curve intersect at the position of differential mode inductance.
The firewire and zero curve set on circuit board is used to be connected with external power supply.There are two connecting pin, strings for differential mode inductance tool
It is connected in zero curve.At the position of differential mode inductance, firewire and zero curve are intersected.
The electromagnetic wave that coil panel generates can promote firewire and zero curve to generate common mode interference.Firewire and zero curve is arranged in a crossed manner,
Then since firewire and zero curve are intersecting front and rear polarity on the contrary, the polarity of the equivalent capacity formed is on the contrary, then before crossover location
The common mode interference signal of end and rear end is cancelled out each other.
Technical solution provided in this embodiment, by setting firewire and zero curve on circuit boards, and concatenation is poor in zero curve
Mould inductance, and firewire and zero curve is made to intersect at the poor position of differential mode inductance, the common mode interference signal phase at crossover location both ends
It mutually offsets, reduces the common-mode signal interference for entering electricity network by power input component.It in addition, can also using differential mode inductance
The DM EMI between firewire and zero curve is enough eliminated, further reduces the differential mode for entering electricity network by power input component
Signal interference improves the Products Compatibility energy of electromagnetic oven.
The technical solution that the various embodiments described above are provided is arranged on for differential mode inductance on firewire, and what the present embodiment was provided
Technical solution is arranged on for differential mode inductance on zero curve, remaining realization method can refer to the various embodiments described above.
Specifically, zero curve includes：First Line section and the second part of path, wherein, First Line section is used to receive external electrical
Source, the second part of path are used to be connected with subsequent conditioning circuit, such as：Rectification circuit.
Differential mode inductance is connected between First Line section and the second part of path.Specifically, there are two connect for differential mode inductance tool
End, is connected respectively with First Line section and the second part of path.
Firewire includes：Tertiary circuit section, the 4th part of path and the 5th part of path being sequentially connected.Wherein, tertiary circuit section
For receiving external power supply, the 5th part of path is used to be connected with subsequent conditioning circuit, such as：Rectification circuit.It is equivalent to the second part of path
It is connected with the 5th part of path with two input terminals of rectification circuit.
Tertiary circuit section is parallel with First Line section, and is sticked on the surface of circuit board.5th part of path and the second circuit
Duan Pinghang, and be sticked on the surface of circuit board.
4th part of path is arranged with differential mode inductance along perpendicular to the direction of circuit board surface.I.e.：From along perpendicular to circuit board
On the direction on surface, the 4th part of path is located at the top of differential mode inductance, be equivalent to the 4th part of path from the top of differential mode inductance across
It crosses.Alternatively, the 4th part of path is located at the lower section of differential mode inductance.In the present embodiment, the 4th part of path is located at differential mode inductance and circuit
Between plate namely：From along on the direction of circuit board surface, the 4th part of path is located at the lower section of differential mode inductance.
Further, the second part of path is conllinear with the extending direction of tertiary circuit section, the 5th part of path and First Line section
Extending direction it is conllinear.
Certainly, other than the said program that the present embodiment is provided, the second part of path can be between tertiary circuit section
It is in set angle in set angle, and between the 5th part of path and First Line section.
Alternatively, between the distance between First Line section and tertiary circuit section and the second part of path and the 5th part of path away from
From unequal.
Embodiment five
The present embodiment provides a kind of electromagnetic heater, including：Electrical heating elements and as above-mentioned any embodiment provides
Power input component, which is electrically connected with power input component.
Electrical heating elements can be coil panel.Power input component is used to receive external power supply, and provide drive for coil panel
Dynamic circuit, so that coil panel emits electromagnetic wave.
Electromagnetic heater provided in this embodiment, using above-mentioned power input component, by setting fire on circuit boards
Line and zero curve, and differential mode inductance is concatenated in zero curve, and firewire and zero curve is made to intersect at the poor position of differential mode inductance, intersect
The common mode interference signal at position both ends is cancelled out each other, and is reduced and is entered the common-mode signal of electricity network by power input component and do
It disturbs.In addition, also being able to eliminate the DM EMI between firewire and zero curve using differential mode inductance, further reduce defeated by power supply
Enter the difference mode signal interference that component enters electricity network, improve the Products Compatibility energy of electromagnetic oven.
Embodiment six
The present embodiment provides a kind of electromagnetic oven, including：Housing and the microcrystal face plate for being arranged on case top, microcrystal face plate
For carrying cookware.The electromagnetic heater provided such as above-described embodiment is provided in housing.
Electromagnetic oven provided in this embodiment using above-mentioned electromagnetic heater, passes through the circuit board in power input component
Upper setting firewire and zero curve, and differential mode inductance is concatenated in zero curve, and make firewire and zero curve at the poor position of differential mode inductance
Intersect, the common mode interference signal at crossover location both ends cancels out each other, reduces and enter electricity network by power input component
Common-mode signal is interfered.In addition, also being able to eliminate the DM EMI between firewire and zero curve using differential mode inductance, further reduce
The difference mode signal for entering electricity network by power input component interferes, and improves the Products Compatibility energy of electromagnetic oven.
In the description of the present invention, it is to be appreciated that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
The fingers such as degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer "
The orientation or position relationship shown be based on orientation shown in the drawings or position relationship, be for only for ease of description the utility model and
Simplify description rather than instruction or imply that signified device or element there must be specific orientation, with specific azimuth configuration
And operation, therefore it is not intended that limitation to the utility model.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature." multiple " are meant that at least two in the description of the present invention, example
Such as two, three etc., unless otherwise specifically defined.
In the utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
Mechanical connection or electrical connection can communicate with one another；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, can be the interaction relationship of connection inside two elements or two elements.For those of ordinary skill in the art
For, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, those of ordinary skill in the art should
Understand：It can still modify to the technical solution recorded in foregoing embodiments either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacement, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of power input component, which is characterized in that including：Circuit board is provided with firewire and zero curve on the circuit board, institute
It states and differential mode inductance is concatenated in firewire；The firewire and zero curve intersect at the position of the differential mode inductance.
2. power input component according to claim 1, which is characterized in that the firewire includes：First Line section and
Two part of paths；The First Line section is used to receive external power supply；The differential mode inductance is connected to First Line section and the second line
Between section；
The zero curve includes：Tertiary circuit section, the 4th part of path and the 5th part of path being sequentially connected；The tertiary circuit section is used
In reception external power supply；
The tertiary circuit section is parallel with First Line section, and the 5th part of path is parallel with the second part of path；4th part of path
It arranges with differential mode inductance along perpendicular to the direction of circuit board surface.
3. power input component according to claim 2, which is characterized in that the 4th part of path is located at differential mode electricity
Between sense and circuit board.
4. power input component according to claim 3, which is characterized in that second part of path and tertiary circuit section
Extending direction is conllinear.
5. power input component according to claim 4, which is characterized in that the 5th part of path and First Line section
Extending direction is conllinear.
6. a kind of power input component, which is characterized in that including：Circuit board is provided with firewire and zero curve on the circuit board, institute
It states and differential mode inductance is concatenated in zero curve；The firewire and zero curve intersect at the position of the differential mode inductance.
7. power input component according to claim 6, which is characterized in that the zero curve includes：First Line section and
Two part of paths；The First Line section is used to receive external power supply；The differential mode inductance is connected to First Line section and the second line
Between section；
The firewire includes：Tertiary circuit section, the 4th part of path and the 5th part of path being sequentially connected；The tertiary circuit section is used
In reception external power supply；
The tertiary circuit section is parallel with First Line section, and the 5th part of path is parallel with the second part of path；4th part of path
It arranges with differential mode inductance along perpendicular to the direction of circuit board surface.
8. power input component according to claim 7, which is characterized in that the 4th part of path is located at differential mode electricity
Between sense and circuit board.
9. a kind of electromagnetic heater, which is characterized in that including：Electrical heating elements and such as claim 1-8 any one of them
Power input component；The electrical heating elements are electrically connected with the power input component.
10. a kind of electromagnetic oven, which is characterized in that including：Housing, the microcrystal face plate for being arranged on case top；It is set in the housing
It is equipped with electromagnetic heater as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848145.2U CN207589212U (en) | 2017-12-26 | 2017-12-26 | Power input assembly, electromagnetic heating device and induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848145.2U CN207589212U (en) | 2017-12-26 | 2017-12-26 | Power input assembly, electromagnetic heating device and induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207589212U true CN207589212U (en) | 2018-07-06 |
Family
ID=62740422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721848145.2U Expired - Fee Related CN207589212U (en) | 2017-12-26 | 2017-12-26 | Power input assembly, electromagnetic heating device and induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207589212U (en) |
-
2017
- 2017-12-26 CN CN201721848145.2U patent/CN207589212U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180706 |