CN101561307B - 电子液体位置检测和显示装置的应用方法 - Google Patents
电子液体位置检测和显示装置的应用方法 Download PDFInfo
- Publication number
- CN101561307B CN101561307B CN2009101074622A CN200910107462A CN101561307B CN 101561307 B CN101561307 B CN 101561307B CN 2009101074622 A CN2009101074622 A CN 2009101074622A CN 200910107462 A CN200910107462 A CN 200910107462A CN 101561307 B CN101561307 B CN 101561307B
- Authority
- CN
- China
- Prior art keywords
- liquid
- program
- microprocessor
- liquid position
- liquid level
- 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.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000009835 boiling Methods 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 230000006698 induction Effects 0.000 claims description 49
- 238000009841 combustion method Methods 0.000 claims description 6
- 230000005574 cross-species transmission Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 28
- 230000002265 prevention Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 47
- 239000010949 copper Substances 0.000 description 12
- 229910052802 copper Inorganic materials 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 9
- 239000004020 conductor Substances 0.000 description 9
- 239000011810 insulating material Substances 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- 241000644035 Clava Species 0.000 description 1
- 101100339482 Colletotrichum orbiculare (strain 104-T / ATCC 96160 / CBS 514.97 / LARS 414 / MAFF 240422) HOG1 gene Proteins 0.000 description 1
- 101000868045 Homo sapiens Uncharacterized protein C1orf87 Proteins 0.000 description 1
- 102100032994 Uncharacterized protein C1orf87 Human genes 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/268—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Cookers (AREA)
Abstract
Description
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101074622A CN101561307B (zh) | 2009-05-21 | 2009-05-21 | 电子液体位置检测和显示装置的应用方法 |
| PCT/CN2009/074978 WO2010133067A1 (zh) | 2009-05-21 | 2009-11-17 | 电子液体位置检测和显示装置及其应用方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101074622A CN101561307B (zh) | 2009-05-21 | 2009-05-21 | 电子液体位置检测和显示装置的应用方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101561307A CN101561307A (zh) | 2009-10-21 |
| CN101561307B true CN101561307B (zh) | 2011-10-26 |
Family
ID=41220204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101074622A Active CN101561307B (zh) | 2009-05-21 | 2009-05-21 | 电子液体位置检测和显示装置的应用方法 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101561307B (zh) |
| WO (1) | WO2010133067A1 (zh) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561307B (zh) * | 2009-05-21 | 2011-10-26 | 晶辉电器(深圳)有限公司 | 电子液体位置检测和显示装置的应用方法 |
| GB2475324A (en) * | 2009-11-17 | 2011-05-18 | Kenwood Ltd | Boiling sensor for water-boiling appliances |
| US8521495B2 (en) * | 2010-12-10 | 2013-08-27 | The Boeing Company | Calculating liquid levels in arbitrarily shaped containment vessels using solid modeling |
| CN102589644B (zh) * | 2011-01-14 | 2014-08-20 | 苏州路之遥科技股份有限公司 | 一种电容式液位传感器 |
| CN102928048A (zh) * | 2012-10-17 | 2013-02-13 | 广东顺德星原电子实业有限公司 | 非接触式电子液位检测装置及其操作方法 |
| CN106352950B (zh) * | 2015-07-13 | 2019-03-19 | 桓达科技股份有限公司 | 雷达物液位量测装置及雷达物液位量测方法 |
| FR3040484B1 (fr) | 2015-08-26 | 2019-01-25 | Akwel | Dispositif de mesure sans contact d'un niveau dans un reservoir |
| CN105259422B (zh) * | 2015-10-22 | 2018-03-30 | 宁波力芯科信息科技有限公司 | 电容测量电路、液位检测电路及其使用方法、液位高度检测电路、热水器、智能家居设备 |
| CN106889881B (zh) * | 2015-12-17 | 2018-12-18 | 广东美的生活电器制造有限公司 | 水壶及其加热控制方法 |
| CN107198446A (zh) * | 2016-03-16 | 2017-09-26 | 林增辉 | 一种带有水温水位检测装置的电热快速壶 |
| EP3446112B1 (en) | 2016-04-21 | 2021-06-02 | Hewlett-Packard Development Company, L.P. | Fluid property sensing with electrodes |
| CN108062116A (zh) * | 2017-05-03 | 2018-05-22 | 王智荣 | 液位感应超限告警提示式注水补液控制器 |
| CN107126088B (zh) * | 2017-06-12 | 2022-07-08 | 浙江绍兴苏泊尔生活电器有限公司 | 加热容器 |
| CN107374347A (zh) * | 2017-07-14 | 2017-11-24 | 广西浙缘农业科技有限公司 | 一种防溢电热壶 |
| CN108073196A (zh) * | 2017-08-21 | 2018-05-25 | 王智荣 | 液位感应自动补液控制模块 |
| CN108209572A (zh) * | 2017-12-05 | 2018-06-29 | 浙江绍兴苏泊尔生活电器有限公司 | 加热控制方法和电水壶 |
| EP3720326A4 (en) * | 2017-12-07 | 2021-08-11 | Pitco Frialator, Inc. | FLUID SENSOR AND CONTROL SYSTEM |
| JP7050554B2 (ja) * | 2018-04-04 | 2022-04-08 | リンナイ株式会社 | 被加熱物の状態監視装置 |
| CN109748427A (zh) * | 2019-03-12 | 2019-05-14 | 武汉丽辉新技术有限公司 | 一种多功能饮用水站的控制系统 |
| US11674838B2 (en) | 2019-04-04 | 2023-06-13 | Poseidon Systems Llc | Capacitive fringe field oil level sensor with integrated humidity and temperature sensing |
| CN112133077A (zh) * | 2019-06-24 | 2020-12-25 | 北京亚华意诺斯新能源科技有限公司 | 一种红外数据接收电路 |
| CN110187392A (zh) * | 2019-07-15 | 2019-08-30 | 湖南长城医疗科技有限公司 | 计算频率方式的电容感应型液体检测的方法及装置 |
| CN110269510A (zh) * | 2019-07-18 | 2019-09-24 | 陈毅强 | 一种具有水位检测功能的电热水壶 |
| CN110558835A (zh) * | 2019-08-26 | 2019-12-13 | 陈毅强 | 一种电容式液位检测结构及其电热水壶 |
| CN110849440B (zh) * | 2019-12-03 | 2024-11-08 | 佛山金田申电子有限公司 | 夹管液位侦测装置 |
| CN110946336A (zh) * | 2019-12-31 | 2020-04-03 | 深圳市锐谷科技有限公司 | 一种嘴唇感应加热系统及电子烟 |
| CN111220233A (zh) * | 2020-02-05 | 2020-06-02 | 威海高登旅游休闲用品有限公司 | 一种液位检测电路、装置及其安装方法 |
| CN111665281B (zh) * | 2020-03-24 | 2025-04-15 | 广东吉宝电器科技有限公司 | 一种用于即热式开水机的沸点判断机构 |
| CN112697228A (zh) * | 2020-12-30 | 2021-04-23 | 华北有色工程勘察院有限公司 | 锚索孔注浆液体液面检测装置及检测方法 |
| CN113432668B (zh) * | 2021-06-03 | 2021-12-28 | 施都凯仪器设备(上海)有限公司 | 一种高温高压下灭菌锅加热管防干烧检测方法及系统 |
| CN113640336B (zh) * | 2021-08-23 | 2023-07-14 | 广东纯米电器科技有限公司 | 沸点检测方法、装置、电路及烹饪器具 |
| CN116182497A (zh) * | 2021-11-26 | 2023-05-30 | 青岛海尔电冰箱有限公司 | 储水容器的水位检测方法与计算机存储介质 |
| CN115615515B (zh) * | 2022-12-19 | 2023-03-10 | 河北卧牛净水设备有限公司 | 一种饮水机控制系统及饮水机 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2087356U (zh) * | 1991-01-21 | 1991-10-23 | 兰毅 | 感应式液物位无级调定自动控制仪 |
| CN2580415Y (zh) * | 2002-10-29 | 2003-10-15 | 李志刚 | 液位报警器 |
| CN2699257Y (zh) * | 2003-11-07 | 2005-05-11 | 穆汝太 | 电容感应式液位指示控制装置 |
| CN101169661A (zh) * | 2007-11-22 | 2008-04-30 | 广东亿龙电器股份有限公司 | 一种液位感应控制装置及具有该液位感应控制装置的电器 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2358789A (en) * | 2000-02-07 | 2001-08-08 | Otter Controls Ltd | Liquid heating device with excessive or insufficient water level protection means. |
| KR100794125B1 (ko) * | 2006-07-27 | 2008-01-10 | 웅진코웨이주식회사 | 비접촉식 수위 제어 장치 |
| CN200986461Y (zh) * | 2006-07-28 | 2007-12-05 | 华南农业大学 | 智能电容式液位测量仪 |
| CN200947052Y (zh) * | 2006-09-12 | 2007-09-12 | 李炳蔚 | 插入式圆柱型电容传感器液位测量装置 |
| CN101561307B (zh) * | 2009-05-21 | 2011-10-26 | 晶辉电器(深圳)有限公司 | 电子液体位置检测和显示装置的应用方法 |
-
2009
- 2009-05-21 CN CN2009101074622A patent/CN101561307B/zh active Active
- 2009-11-17 WO PCT/CN2009/074978 patent/WO2010133067A1/zh not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2087356U (zh) * | 1991-01-21 | 1991-10-23 | 兰毅 | 感应式液物位无级调定自动控制仪 |
| CN2580415Y (zh) * | 2002-10-29 | 2003-10-15 | 李志刚 | 液位报警器 |
| CN2699257Y (zh) * | 2003-11-07 | 2005-05-11 | 穆汝太 | 电容感应式液位指示控制装置 |
| CN101169661A (zh) * | 2007-11-22 | 2008-04-30 | 广东亿龙电器股份有限公司 | 一种液位感应控制装置及具有该液位感应控制装置的电器 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101561307A (zh) | 2009-10-21 |
| WO2010133067A1 (zh) | 2010-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101561307B (zh) | 电子液体位置检测和显示装置的应用方法 | |
| CN201548288U (zh) | 电子液体位置检测和显示装置 | |
| CN110558835A (zh) | 一种电容式液位检测结构及其电热水壶 | |
| CN205849315U (zh) | 料理机及其水位检测电路 | |
| CN101191622B (zh) | 一种具有称重功能自动控制火力大小的燃气灶 | |
| CN109744856A (zh) | 无线测温装置、无线测温锅具及无线测温锅灶系统 | |
| CN108309039A (zh) | 电烹饪器及其防溢出加热控制方法和装置 | |
| CN109419315A (zh) | 液体溢出检测方法及装置、锅具、电磁加热组件 | |
| CN203207773U (zh) | 电饭煲 | |
| CN201624537U (zh) | 一种豆浆机用多功能传感器 | |
| CN213842455U (zh) | 一种用于烤箱的食物温度无线探测器 | |
| CN210922766U (zh) | 一种电容式连续液位检测结构及其电热水壶 | |
| CN109419316A (zh) | 液体溢出检测方法及装置、锅具、电磁加热组件 | |
| CN211324365U (zh) | 一种电容式液位检测结构及其电热水壶 | |
| CN108309020A (zh) | 电烹饪器及其防溢出加热控制方法和装置 | |
| CN210408090U (zh) | 一种具有水位检测功能的电热水壶 | |
| CN215893733U (zh) | 一种不锈钢烧水壶电容式水位检测装置及不锈钢烧水壶 | |
| WO2011061482A1 (en) | Boiling sensor | |
| CN212382490U (zh) | 一种电热水壶的多功能检测模块 | |
| CN211909215U (zh) | 一种电磁炉的全自动加热系统 | |
| CN206950058U (zh) | 电烹饪器及其防溢出显示系统 | |
| CN209678213U (zh) | 防溢探头及烹饪器具 | |
| CN108309043B (zh) | 电烹饪器及其防溢出显示系统和防溢出显示方法 | |
| CN212180092U (zh) | 带红外测温的白色家电结构 | |
| CN208957623U (zh) | 烹饪用锅具 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN BEIDING JINGHUI TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CRASTAL TECHNOLOGY (SHENZHEN) CO., LTD. Effective date: 20131226 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131226 Address after: 3, Guangdong, Shenzhen province Nanshan District Xian Xian Road, 2 industrial building, No. 518055, B Patentee after: Shenzhen Beiding Jinghui Science & Technology Co., Ltd. Address before: 518055, No. 4 factory building, Shenzhen Industrial Street, Taoyuan, Nanshan District, Guangdong Patentee before: Crastal Electric (Shenzhen) Co., Ltd. |