CN106724852A - A kind of pre-warmed instant heating type water boiler of interior circulation - Google Patents
A kind of pre-warmed instant heating type water boiler of interior circulation Download PDFInfo
- Publication number
- CN106724852A CN106724852A CN201710146564.XA CN201710146564A CN106724852A CN 106724852 A CN106724852 A CN 106724852A CN 201710146564 A CN201710146564 A CN 201710146564A CN 106724852 A CN106724852 A CN 106724852A
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- Prior art keywords
- water
- water tank
- preheating
- boiler
- heating type
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- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 308
- 238000010438 heat treatment Methods 0.000 title claims abstract description 80
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 42
- 230000005611 electricity Effects 0.000 claims description 3
- 238000009835 boiling Methods 0.000 abstract description 20
- 230000035622 drinking Effects 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 238000009841 combustion method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting devices
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting devices
- A47J31/462—Dispensing spouts, pumps, drain valves or like liquid transporting devices with an intermediate liquid storage tank
- A47J31/465—Dispensing spouts, pumps, drain valves or like liquid transporting devices with an intermediate liquid storage tank for the heated water
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/54—Water boiling vessels in beverage making machines
- A47J31/547—Water boiling vessels in beverage making machines using microwave energy for heating the water
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention relates to a kind of pre-warmed instant heating type water boiler of interior circulation, including the preheating water tank, water pump, thermoelectric heating device and the three-way solenoid valve that are sequentially connected by pipeline, the water inlet end of the three-way solenoid valve is connected by pipeline with the water side of thermoelectric heating device, its first water side is delivery port, its second water side is connected by pipeline with preheating water tank, is internally provided with for switching the valve body that the first water side or the second water side connect with water inlet end.The switching that the present invention passes through three-way solenoid valve, enable instant heating type water boiler in idle thermoelectric heating device for the water in preheating water tank is preheating to higher temperature, again by the switching of three-way solenoid valve, enable thermoelectric heating device that water is heated rapidly to boiling water state, higher state is in because the water in preheating water tank has been preheated with temperature, makes the boiling water water flow of instant heating type water boiler big, save the stand-by period, the power of thermoelectric heating device is small needed for simultaneously, and distribution requirement is low.
Description
Technical field
The present invention relates to a kind of instant heating type drinking machine, specifically a kind of pre-warmed instant heating type water boiler of interior circulation.
Background technology
The instant heating type water boiler of prior art, is made up of water tank, water pump and thermoelectric heating device, and they are sequentially communicated composition i.e. heat
Formula heats water route, and the water in water tank enters thermoelectric heating device under water pump effect, is flowed out after being heated into boiling water.Water in water tank is general
In normal temperature state, when directly heating into boiling water, either water-carrying capacity is very small, or the power of thermoelectric heating device is very big, the former
The too long of time is needed to wait, the latter needs very big distribution requirement, practical effect is bad, it is necessary to further change
Enter.
The content of the invention
It is an object of the invention to overcome the shortcomings of that above-mentioned prior art is present, and it is pre-warmed i.e. to provide a kind of interior circulation
Hot type boiled water machine, it can be preheated to water, make boiling water water flow big, while the power of required thermoelectric heating device is small.
The object of the present invention is achieved like this：
A kind of pre-warmed instant heating type water boiler of interior circulation, its architectural feature is, including the preheating being sequentially connected by pipeline
Water tank, water pump, thermoelectric heating device and three-way solenoid valve, the water inlet end of the three-way solenoid valve pass through the water outlet of pipeline and thermoelectric heating device
End connection, its first water side is delivery port, and its second water side is connected by pipeline with preheating water tank, be internally provided with for
Switch the valve body that the first water side or the second water side connect with water inlet end.
Preheating water tank's check valve or preheating are provided between the preheating water tank and water pump and/or between water pump and thermoelectric heating device
Water tank electromagnetic valve.
Water tank temperature sensor is provided with the preheating water tank, thermoelectric heating device TEMP is provided with the thermoelectric heating device
Device.
The instant heating type water boiler also includes raw water water tank, and it passes through pipeline and is connected with preheating water tank, water pump respectively, described
The second raw water water tank electromagnetic valve is provided between raw water water tank and water pump.
The first raw water water tank electromagnetic valve is provided between the raw water water tank and preheating water tank.
Raw water water tank temperature sensor is provided with the raw water water tank.
Level sensor is provided with the raw water water tank.
The preheating water tank is provided with the first water source magnetic valve being connected with water source.
First water side of the three-way solenoid valve is provided with water mixing valve, hot water water inlet end and the electromagnetism three of the water mixing valve
The first water side connection of port valve, the cold water water inlet end of water mixing valve is connected by second water source magnetic valve with water source；Described second
The water inlet end of water source magnetic valve or water side are provided with water source temperature sensor.
Level sensor is provided with the preheating water tank.
The present invention has the beneficial effect that：
By the switching of three-way solenoid valve, instant heating type water boiler is set to be the water preheating in preheating water tank in idle thermoelectric heating device
To higher temperature, then the switching for passing through three-way solenoid valve, enable thermoelectric heating device that water is heated rapidly to boiling water state, due to pre-
Water in boiler has been preheated with temperature and is in higher state, makes the boiling water water flow of instant heating type water boiler big, save etc.
The time is treated, while the power of required thermoelectric heating device is small, distribution requirement is low.
Instant heating type drinking machine of the invention can be widely used on domestic or commercial instant heating type drinking machine.
Brief description of the drawings
Fig. 1 is the schematic diagram of first embodiment of the invention.
Fig. 2 is the schematic diagram of second embodiment of the invention.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
First embodiment
Referring to Fig. 1, the pre-warmed instant heating type water boiler of this interior circulation, including the preheating water tank 1, water pump being sequentially connected by pipeline
2nd, thermoelectric heating device 3 and three-way solenoid valve 4, the water inlet end of the three-way solenoid valve 4 are connected by pipeline with the water side of thermoelectric heating device 4
Connect, its first water side is delivery port, and its second water side is connected with preheating water tank 1 by pipeline, is internally provided with for cutting
Change the valve body that the first water side or the second water side connect with water inlet end.Switched by the valve body of three-way solenoid valve 4, it is Instant heating type to open
Water dispenser connects water inlet end and second water side of three-way solenoid valve 4 in idle, and in the presence of water pump 2, the energy of thermoelectric heating device 3
Enough for the water in preheating water tank 1 is preheating to higher temperature（Such as 65 degree）.Again by the switching of three-way solenoid valve, instant heating type water boiler
In normal work, water inlet end and second water side of three-way solenoid valve 4 are connected, and in the presence of water pump 2, make thermoelectric heating device
4 can be heated rapidly to boiling water state the water in preheating water tank 1, because the water in preheating water tank 1 is had been preheated with temperature
In higher state, make the boiling water water flow of instant heating type water boiler big, the stand-by period is saved, while the power of required thermoelectric heating device
Small, distribution requirement is low.
Further, the present embodiment is provided with preheating water tank's magnetic valve 72 between preheating water tank 1 and water pump 2, and it can be single
Go out water passage to opening preheating water tank 1, it is to avoid boiling water flows backwards and damages associated appliance element.In addition, certainly can also be in water pump 2
Extra preheating water tank's check valve or preheating water tank's magnetic valve is further set between thermoelectric heating device 3, it is also possible to only in water pump 2
Single preheating water tank's check valve or preheating water tank's magnetic valve are set between thermoelectric heating device 3, and anti-backflow is better, this area
Technical staff be appreciated that.
Further, it is provided with preheating water tank 1 in water tank temperature sensor 11, the thermoelectric heating device 3 and is provided with thermoelectric heating device
Temperature sensor 31, is contrasted by the water temperature of water tank temperature sensor 11 and leaving water temperature sensors 31, can learn electric heating
Whether device 3 can be completely heated up to boil condition the water for flowing through, if thermoelectric heating device 3 can be completely heated up extremely the water for flowing through
Boil condition, you can the water that increase water flow can just flow through water to it is completely heated up to boiling, if electricity heating
Device 3 can not be completely heated up to boil condition the water for flowing through, that is, reduce the water that water flow can just flow through water to it
It is completely heated up to boiling.Wherein, described thermoelectric heating device 3 is using thick film thermoelectric heating device, metal electric heating tube, metal electricity hair
Hot plate or quartzy electric heating tube etc..
In order that instant heating type water boiler can possess warm water/water at low temperature（I.e. its water temperature is than the water temperature in preheating water tank 1
It is low）Function, further, instant heating type water boiler also include raw water water tank 5（For holding the filtering that can be directly drunk by filtering
Water）, it passes through pipeline and is connected with preheating water tank 1, water pump 2 respectively, and the second raw water is provided between the raw water water tank 5 and water pump 2
Water tank electromagnetic valve 52, the second raw water water tank electromagnetic valve 52 can unidirectionally open raw water water tank 5 and go out water passage to water pump 2.In pressure
In the presence of strong, preheating water tank 1 spends the water of many a small amount of, and raw water water tank 5 toward preheating water tank 1 with regard to directly can again supplement many a small amount of
Water, the pressure of two water tanks 1 is at poised state all the time.
Further, the first raw water water tank electromagnetic valve 51 is provided between the raw water water tank 5 and preheating water tank 1, first is former
Water tank magnetic valve 51 can unidirectionally open raw water water tank 5 and go out water passage to preheating water tank 1, and instant-heating water drinking machine can be made more to have
Plan ground carries out moisturizing to preheating water tank 1, and the water in preheating water tank 1 can be avoided often full, prevents from causing pressure because of preheating
Excessive phenomenon, security performance is more preferable, it is also possible to play a part of to prevent hot water from flowing backwards.
Further, raw water water tank temperature sensor 53 is provided with raw water water tank 5, it can be detected in raw water water tank 5
Temperature, can more accurately go out the function of the warm water/water at low temperature of required temperature.
In addition, being provided with level sensor 6 in raw water water tank 5, when the water level of raw water water tank 5 is low, thermoelectric heating device 4 will stop work
Make, it is to avoid dry combustion method occur, due to raw water water tank 5 can actively to the moisturizing of preheating water tank 1, therefore, under the technical scheme, preheating
Water tank 1 can no longer set level sensor, with cost-effective.
Operation principle of the invention is：When going out boiling water state, preheating water tank's magnetic valve 72, water pump 2 and the work of thermoelectric heating device 3
Make, the first water side of three-way solenoid valve 4 with water inlet end for channel status, i.e. three-way solenoid valve 4 go out boiling water, now, electromagnetism three
Port valve 4 goes out water temperature and can be sensed by leaving water temperature sensors 31.During the pre- Warm status of interior circulation, preheating water tank's magnetic valve 72,
Water pump 2 and thermoelectric heating device 3 work, and the second water side and the water inlet end of three-way solenoid valve 4 are channel status, now preheating water tank 1
Interior water is heated in interior circulation state, the water in preheating water tank 1 is preheating to higher temperature levels（Such as 65 degree）, now, water tank 1
Interior preheating temperature can be sensed by water tank temperature sensor 11；I.e. idle state when, the water in preheating water tank 1 can be preheating to compared with
High-temperature, because the water in preheating water tank 1 had been warmed up, instant heating type water boiler can be with larger water outlet water when boiling water is gone out
Outflow boiling water, save the boiling water time, at the same effectively reduce thermoelectric heating device 3 peak power, make instant heating type water boiler be in compared with
Low power is that can be used, distribution requirement it is lower, be particularly suitable for the big use occasion of boiling water consumption and use, such as many people have a dinner party, wine
Shop, hotel, restaurant etc..When using the technical scheme for setting up raw water water tank 5, instant heating type water boiler is also equipped with out warm water/low temperature
The function of water, when the function is used, the second raw water water tank electromagnetic valve 52, water pump 2 and thermoelectric heating device 3 work, three-way solenoid valve 4
First water side and water inlet end go out warm water/water at low temperature for channel status, i.e. three-way solenoid valve 4, and now, three-way solenoid valve 4 goes out
The temperature for going out warm water/water at low temperature can be sensed by leaving water temperature sensors 31.
Second embodiment
Referring to Fig. 2, the pre-warmed instant heating type water boiler of this interior circulation, it is differred primarily in that with first embodiment：
First, preheating water tank's check valve 71 is provided between preheating water tank 1 and water pump 2, it can unidirectionally open going out for preheating water tank 1
Water passage, it is to avoid boiling water flows backwards and damages associated appliance element.In addition, certainly also one can be entered between water pump 2 and thermoelectric heating device 3
Step sets extra preheating water tank's check valve or preheating water tank's magnetic valve, it is also possible to only set between water pump 2 and thermoelectric heating device 3
Single preheating water tank's check valve or preheating water tank's magnetic valve, anti-backflow are better, and those skilled in the art is appreciated that.
Wherein, preheating water tank's check valve 71 is that mechanical, first embodiment preheating water tank's magnetic valve 72 is electric-controlled type, the work for being played
With all same, those skilled in the art is appreciated that.
2nd, preheating water tank 1 is provided with the first water source magnetic valve 12 being connected with water source, can be carried out certainly for preheating water tank 1
Dynamic moisturizing, is now preferably provided with level sensor 6 in preheating water tank 1, and when the water level of preheating water tank 1 is low, thermoelectric heating device 4 will stop work
Make, it is to avoid dry combustion method occurs.
3rd, the first water side of three-way solenoid valve 4 is provided with water mixing valve, hot water water inlet end and the electromagnetism three of the water mixing valve
The first water side connection of port valve 4, the cold water water inlet end of water mixing valve is connected by second water source magnetic valve 13 with water source.The technology
Scheme makes this instant heating type water boiler equally can possess warm water/water at low temperature（That is its water temperature is lower than water temperature in preheating water tank 1）
Function, now described water source, preferably direct drinking type water source certainly.Need to open water mixing valve, the first of three-way solenoid valve 4 goes out
Water end (W.E.) goes out boiling water, and second water source magnetic valve 13 opens out cold water, and both become warm water/water at low temperature outflow after mixing.Work as water mixing valve
Further be electronics water mixing valve when, in order to ensure leaving water temperature, can further second water source magnetic valve 13 water inlet end or
Water side is provided with water source temperature sensor 131, now according to the contrast of water source temperature and water temperature, you can automatic dispensing institute
Need the warm water/water at low temperature of temperature.
Other not described parts, same first embodiment is not repeated.
Above-described embodiment is preferred scheme of the invention, and the present invention can also have other embodiments.The technology of this area
Personnel can also make equivalent variations or replacement on the premise of without prejudice to spirit of the invention, and these equivalent modifications or replacement are wrapped
It is contained in the scope set by the application claim.
Claims (10)
1. the pre-warmed instant heating type water boiler of a kind of interior circulation, it is characterised in that including the preheating water being sequentially connected by pipeline
Case（1）, water pump（2）, thermoelectric heating device（3）And three-way solenoid valve（4）, the three-way solenoid valve（4）Water inlet end by pipeline with
Thermoelectric heating device（4）Water side connection, its first water side be delivery port, its second water side pass through pipeline and preheating water tank
（1）Connection, is internally provided with for switching the valve body that the first water side or the second water side connect with water inlet end.
2. the pre-warmed instant heating type water boiler of interior circulation according to claim 1, it is characterised in that：The preheating water tank（1）
With water pump（2）Between and/or water pump（2）With thermoelectric heating device（3）Between be provided with preheating water tank's check valve（71）Or preheating water tank's electricity
Magnet valve（72）.
3. the pre-warmed instant heating type water boiler of interior circulation according to claim 1, it is characterised in that：The preheating water tank（1）
Inside it is provided with water tank temperature sensor（11）, the thermoelectric heating device（3）Inside it is provided with thermoelectric heating device temperature sensor（31）.
4. the pre-warmed instant heating type water boiler of interior circulation according to claim 1, it is characterised in that：The instant heating type water boiler
Also include raw water water tank（5）, its pass through pipeline respectively with preheating water tank（1）, water pump（2）Connection, the raw water water tank（5）With water
Pump（2）Between be provided with the second raw water water tank electromagnetic valve（52）.
5. the pre-warmed instant heating type water boiler of interior circulation according to claim 4, it is characterised in that：The raw water water tank（5）
With preheating water tank（1）Between be provided with the first raw water water tank electromagnetic valve（51）.
6. the pre-warmed instant heating type water boiler of interior circulation according to claim 4, it is characterised in that：The raw water water tank（5）
Inside it is provided with raw water water tank temperature sensor（53）.
7. the pre-warmed instant heating type water boiler of interior circulation according to claim 4, it is characterised in that：The raw water water tank（5）
Inside it is provided with level sensor（6）.
8. the pre-warmed instant heating type water boiler of interior circulation according to claim 1, it is characterised in that：The preheating water tank（1）
It is provided with the first water source magnetic valve being connected with water source（12）.
9. the pre-warmed instant heating type water boiler of interior circulation according to claim 7, it is characterised in that：The three-way solenoid valve
（4）The first water side be provided with water mixing valve, the hot water water inlet end and three-way solenoid valve of the water mixing valve（4）The first water side
Connection, the cold water water inlet end of water mixing valve passes through second water source magnetic valve（13）It is connected with water source；The second water source magnetic valve
（13）Water inlet end or water side be provided with water source temperature sensor（131）.
10. the pre-warmed instant heating type water boiler of interior circulation according to claim any one of 1-9, it is characterised in that：It is described pre-
Boiler（1）Inside it is provided with level sensor（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710146564.XA CN106724852A (en) | 2017-03-13 | 2017-03-13 | A kind of pre-warmed instant heating type water boiler of interior circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710146564.XA CN106724852A (en) | 2017-03-13 | 2017-03-13 | A kind of pre-warmed instant heating type water boiler of interior circulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106724852A true CN106724852A (en) | 2017-05-31 |
Family
ID=58960989
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710146564.XA Pending CN106724852A (en) | 2017-03-13 | 2017-03-13 | A kind of pre-warmed instant heating type water boiler of interior circulation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107969916A (en) * | 2017-11-14 | 2018-05-01 | 珠海格力电器股份有限公司 | A kind of water dispenser and its control method |
| CN108088089A (en) * | 2017-12-05 | 2018-05-29 | 莱克电气股份有限公司 | A kind of water purifier heating means |
| CN108224750A (en) * | 2018-03-16 | 2018-06-29 | 上海六滴智能科技有限公司 | A kind of drinking equipment heating system |
| CN108903656A (en) * | 2018-09-28 | 2018-11-30 | 广州海科电子科技有限公司 | Water dispenser and Water source switching device |
| CN113712435A (en) * | 2021-10-14 | 2021-11-30 | 广东摩飞科技有限公司 | Control method and instant heating type water dispenser |
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| CN203749196U (en) * | 2014-02-27 | 2014-08-06 | 美是德实业有限公司 | Safety drinking water system with automatic water adding function |
| CN104873102A (en) * | 2014-02-27 | 2015-09-02 | 美是德实业有限公司 | Drinking water system with automatic water adding function and safety control method thereof |
| CN104921597A (en) * | 2015-06-24 | 2015-09-23 | 广东众辰科技有限公司 | Temperature-adjustable rapid heating water boiler |
| CN204734347U (en) * | 2015-06-08 | 2015-11-04 | 莱克电气绿能科技(苏州)有限公司 | Speed hot purifier of function is preheated from area |
| CN207544922U (en) * | 2017-03-13 | 2018-06-29 | 佛山吉宝信息科技有限公司 | The pre-warmed instant heating type water boiler of cycle in a kind of |
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| CN203749196U (en) * | 2014-02-27 | 2014-08-06 | 美是德实业有限公司 | Safety drinking water system with automatic water adding function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107969916A (en) * | 2017-11-14 | 2018-05-01 | 珠海格力电器股份有限公司 | A kind of water dispenser and its control method |
| CN108088089A (en) * | 2017-12-05 | 2018-05-29 | 莱克电气股份有限公司 | A kind of water purifier heating means |
| CN108224750A (en) * | 2018-03-16 | 2018-06-29 | 上海六滴智能科技有限公司 | A kind of drinking equipment heating system |
| CN108903656A (en) * | 2018-09-28 | 2018-11-30 | 广州海科电子科技有限公司 | Water dispenser and Water source switching device |
| CN108903656B (en) * | 2018-09-28 | 2024-04-19 | 广州海科电子科技有限公司 | Water dispenser and water source conversion device |
| CN113712435A (en) * | 2021-10-14 | 2021-11-30 | 广东摩飞科技有限公司 | Control method and instant heating type water dispenser |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.301, block 1, gaojun science and technology innovation center, No.1 Chaogui South Road, Ronggui xiaohuangpu neighborhood committee, Shunde District, Foshan City, Guangdong Province Applicant after: GUANGDONG JIBAO ELECTRICAL APPLIANCE TECHNOLOGY Co.,Ltd. Address before: 528305 Guangdong province Foshan city Shunde District Ronggui Huangpu small neighborhood of Shunde hi tech Zone (Ronggui) Jianye Road No. 7 the first floor of the four Applicant before: FOSHAN JIBAO INFORMATION TECHNOLOGY Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |