CN111121272B - Double-channel voltage-stabilizing water heating device - Google Patents
Double-channel voltage-stabilizing water heating device Download PDFInfo
- Publication number
- CN111121272B CN111121272B CN202010007206.2A CN202010007206A CN111121272B CN 111121272 B CN111121272 B CN 111121272B CN 202010007206 A CN202010007206 A CN 202010007206A CN 111121272 B CN111121272 B CN 111121272B
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- Prior art keywords
- heating
- pipe
- driving
- water
- block
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000010438 heat treatment Methods 0.000 title claims abstract description 75
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000005485 electric heating Methods 0.000 claims abstract description 24
- 230000000670 limiting effect Effects 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000007790 scraping Methods 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
- F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0042—Cleaning arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/14—Arrangements for connecting different sections, e.g. in water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention belongs to the field of water heating devices, and particularly relates to a double-channel pressure-stabilizing water heating device which comprises two heating pipes arranged side by side, wherein a one-way water inlet pipe is fixedly communicated on the side wall of each heating pipe, an electric heating rod is fixedly installed in each heating pipe, a piston block is connected in the heating pipes in a sealing and sliding manner, the lower ends of the two heating pipes are fixedly communicated with a driving pipe, the two piston blocks and the driving pipe jointly form a closed space, a threaded rod is rotatably connected in each driving pipe along the axis of the driving pipe, a driving block is connected to the threaded rod in a sealing manner, the driving block and the side wall of the driving pipe are in sealing and sliding manner, a limiting mechanism for limiting the driving block is arranged on the side wall of the driving pipe, and a motor for driving the threaded rod to rotate is arranged outside the driving pipe. Compared with the traditional water heater, the water heater can greatly reduce the heating time of hot water and improve the performance of the water heater on the premise of ensuring sufficient supply of the hot water.
Description
Technical Field
The invention belongs to the field of water heating devices, and particularly relates to a double-channel pressure-stabilizing water heating device.
Background
The existing water heating devices such as water heaters generally comprise an instant heating type water heater and a water storage type water heater, wherein the instant heating type water heater is used for discharging hot water and adding cold water at the same time, so that on one hand, a large amount of cold water continuously flows into the water heater to cool the original hot water, on the other hand, the requirement on power for rapidly heating and warming the cold water is large, and the power consumption burden is increased; and the water storage type water heater is after the big water of storage, carries out the concentrated heating to water, and along with the water yield reduction of retaining intracavity, the condition that water pressure is not enough can appear to influence user's normal use, and, the use of retaining type water heater receives the influence of retaining volume great.
To this end, we propose a two-channel pressure stabilizing type water heating apparatus to solve the above problems.
Disclosure of Invention
The invention aims to provide a double-channel pressure stabilizing water heating device with low power aiming at the problems of incomplete heating mode, high heating power, insufficient water pressure of hot water and the like of the existing water and electric heating device.
In order to achieve the purpose, the invention adopts the following technical scheme: a double-channel pressure stabilizing water heating device comprises two heating pipes arranged side by side, wherein a one-way water inlet pipe is fixedly communicated with the side walls of the heating pipes, an electric heating rod is fixedly installed in each heating pipe, a piston block is connected in the heating pipes in a sealing and sliding mode, a driving pipe is fixedly communicated with the lower ends of the two heating pipes, the two piston blocks and the driving pipe jointly form a closed space, a threaded rod is connected in the driving pipe in a rotating mode along the axis of the driving pipe, a driving block is connected on the threaded rod in a sealing mode, the driving block and the side walls of the driving pipes in a sealing and sliding mode, a limiting mechanism used for limiting the driving block is arranged on the side walls of the driving pipes, a motor used for driving the threaded rod to rotate is arranged outside the driving pipes, transition pipes are fixedly communicated with the upper ends of the two heating pipes, a water outlet pipe is fixedly communicated with the middle of each transition pipe, and a sealing plate is rotatably connected on the side walls of the water outlet pipes, and a sealing groove corresponding to the sealing plate is arranged on the side wall of the water outlet pipe.
In foretell binary channels steady voltage type water heating device, stop gear is including setting up the bar spout on the driving tube inside wall, the bar spout is parallel with driving tube axis direction, be equipped with the arch on the lateral wall of driving block, the arch is located the bar spout and slides with the bar spout is sealed.
In the above-mentioned two-channel pressure-stabilizing water heating apparatus, the heating wire is installed in the water outlet pipe.
In the above-mentioned double-channel pressure stabilization type water heating device, the upper end of the piston block is fixedly connected with a scraping ring through a connecting rod, the position of the scraping ring corresponds to the position of the electric heating rod, and the inner diameter of the scraping ring is the same as the diameter of the electric heating rod.
Compared with the prior art, this binary channels steady voltage type water heating device's advantage lies in:
1. compared with the traditional water heater, the water heater can greatly reduce the heating time of hot water and improve the performance of the water heater on the premise of ensuring sufficient supply of the hot water.
2. According to the invention, the piston block and the driving block are arranged, the motor is used for driving the threaded rod to rotate, the threaded rod drives the driving block to move in the driving pipe, and the driving block can drive the piston block to move up and down due to the closed space between the driving block and the piston block, so that sufficient water pressure can be ensured.
3. According to the invention, by arranging the two piston blocks, when one piston block moves upwards to drain water from the heating pipe, the other piston block moves downwards to feed water into the other heating pipe, so that seamless connection between the two is ensured, and continuous and uninterrupted supply of hot water is ensured.
4. According to the invention, by arranging the sealing plate, when the two piston blocks move upwards and downwards respectively, one side of the sealing plate is subjected to thrust and the other side of the sealing plate is subjected to suction, so that the sealing plate is attached to one side of the transition pipe, cold water and hot water are isolated from each other, and the whole device is simple and convenient and has high response speed.
5. According to the invention, the electric heating wire is arranged, so that the temperature of hot water can be raised again after the electric heating rod finishes heating the water body once, and the electric heating wire is matched with the electric heating rod to realize staged heating, thereby reducing the power of the heater.
6. According to the invention, the scraping ring is arranged, so that when the scraping ring moves upwards along with the piston block, the surface of the electric heating rod can be scraped, the existence of scale on the surface of the electric heating rod is reduced, the heating efficiency of a water body is improved, and the scraping ring has a limiting effect on the piston block, so that the collision between the piston block and the electric heating rod is avoided.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of a two-channel pressure-stabilizing water heating apparatus provided by the present invention;
FIG. 2 is a schematic structural view of an embodiment 2 of a two-channel pressure-stabilizing water heating apparatus according to the present invention;
fig. 3 is a schematic structural diagram of an embodiment 3 of a two-channel pressure stabilizing water heating device provided by the invention.
In the figure, 1 a heating tube; 2, a one-way water inlet pipe; 3, electrically heating a rod; 4, a piston block; 5 driving the tube; 6, a threaded rod; 7 driving the block; 8, a motor; 9 a transition pipe; 10, discharging a water pipe; 11 sealing plates; 12 heating wires; 13 scraping ring.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1, a binary channels steady voltage type water heating device, including two heating pipes 1 that set up side by side, fixed intercommunication has one-way inlet tube 2 on the lateral wall of heating pipe 1, install the check valve on the one-way inlet tube 2, this check valve only allows the water to get into in the heating pipe 1 by the outside, and the end and the outside water source intercommunication of intaking of this one-way inlet tube 2, fixed mounting has electric heating rod 3 in the heating pipe 1, sealed sliding connection has piston block 4 in the heating pipe 1, the fixed intercommunication of the lower extreme of two heating pipes 1 has drive tube 5, two piston blocks 4 and drive tube 5 form airtight space jointly, it is connected with threaded rod 6 to rotate along its axis in the drive tube 5, threaded rod 6 goes up threaded seal and is connected with drive block 7, drive block 7 slides with the lateral wall seal of drive tube 5.
The side wall of the driving tube 5 is provided with a limiting mechanism for limiting the driving block 7, specifically, the limiting mechanism comprises a strip-shaped chute arranged on the inner side wall of the driving tube 5, the strip-shaped chute is parallel to the axial direction of the driving tube 5, the side wall of the driving block 7 is provided with a bulge, the bulge is positioned in the strip-shaped chute and slides in a sealing manner with the strip-shaped chute, the driving tube 5 is externally provided with a motor 8 for driving a threaded rod 6 to rotate, the motor 8 is a servo motor, the power supply of the motor 8 is connected with a control panel, the motor 8 can be controlled to rotate forwards and reversely intermittently through the control panel, the upper ends of the two heating tubes 1 are fixedly communicated with a transition tube 9, the middle part of the transition tube 9 is fixedly communicated with a water outlet tube 10, the transition tube 9 is rotatably connected with a sealing plate 11 on the side wall opposite to the water outlet tube 10, specifically, the transition tube 9 is fixedly connected with a fixing seat corresponding to the axial position of the water outlet tube 10, and one end of the sealing plate 11 is rotatably connected with the fixing seat, the side wall of the water outlet pipe 10 is provided with a sealing groove corresponding to the sealing plate 11.
The working principle of the embodiment is as follows:
this embodiment is when using, starter motor 8, make motor 8 drive threaded rod 6 slow rotation, because drive block 7 and 6 threaded connection of threaded rod, and drive block 7 is spacing by protruding and bar spout, so threaded rod 6 can drive block 7 round trip movement, two piston blocks 4 of drive block 7 drive move along heating pipe 1, rebound's piston block 4 extrudees hot water to outlet pipe 10 in, the piston block 4 of lapse inhales cold water in heating pipe 1, along with drive block 7 round trip movement, can realize that two heating pipes 1 inhale water in turn, the drainage, this device not only can provide stable water pressure, and, adopt supply hot water in turn, the mode of binary channels heating, can satisfy hydrothermal continuation, stable supply.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that: an electric heating wire 12 is arranged in the water outlet pipe 10.
In the present embodiment, the heating wire 12 is added, so that after the electric heating rod 3 completes one-time heating of the water body, the temperature of the hot water can be raised again, and the heating wire 12 is matched with the electric heating rod 3 to realize staged heating, thereby reducing the power of the heater.
Example 3
As shown in fig. 3, the present embodiment is different from embodiment 2 in that: the upper end of the piston block 4 is fixedly connected with a scraping ring 13 through a connecting rod, the position of the scraping ring 13 corresponds to the position of the electric heating rod 3, and the inner diameter of the scraping ring 13 is the same as the diameter of the electric heating rod 3.
In this embodiment, when scraping ring 13 moves upwards along with piston block 4, can scrape the surface of electric heating rod 3 to reduce the existence of electric heating rod 3 surface scale deposit, thereby improve the heating efficiency to the water, and because scraping ring 13's existence, can play spacing effect to piston block 4, avoid taking place the conflict between piston block 4 and the electric heating rod 3.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The utility model provides a binary channels steady voltage type water heating device, its characterized in that includes two heating pipes (1) that set up side by side, fixed intercommunication has one-way inlet tube (2) on the lateral wall of heating pipe (1), fixed mounting has electrical heating rod (3) in heating pipe (1), sealed sliding connection has piston block (4) in heating pipe (1), two the fixed intercommunication of lower extreme of heating pipe (1) has drive tube (5), two piston block (4) and drive tube (5) form airtight space jointly, it is connected with threaded rod (6) to rotate along its axis in drive tube (5), threaded rod (6) are gone up screw thread sealing and are connected with drive block (7), the lateral wall sealing of drive block (7) and drive tube (5) slides, be equipped with the stop gear who is used for restricting drive block (7) on the lateral wall of drive tube (5), the utility model discloses a heating pipe, including driving pipe (5), transition pipe (9), sealing plate (11), drive block, be equipped with on the lateral wall of outlet pipe (10) and be used for driving threaded rod (6) pivoted motor (8), two outside drive pipe (5) the fixed intercommunication in upper end of heating pipe (1) has transition pipe (9), the fixed intercommunication in middle part of transition pipe (9) has outlet pipe (10), transition pipe (9) just rotate on the lateral wall of outlet pipe (10) and are connected with sealing plate (11), be equipped with the seal groove corresponding with sealing plate (11) on the lateral wall of outlet pipe (10), realize two heating pipes through the round trip movement of drive block and absorb water, drainage in turn.
2. The double-channel pressure stabilizing water heating device according to claim 1, wherein the limiting mechanism comprises a strip-shaped sliding groove arranged on the inner side wall of the driving tube (5), the strip-shaped sliding groove is parallel to the axial direction of the driving tube (5), a protrusion is arranged on the side wall of the driving block (7), and the protrusion is positioned in the strip-shaped sliding groove and slides in a sealing manner with the strip-shaped sliding groove.
3. The dual channel pressure stabilizing water heating apparatus as claimed in claim 2, wherein the water outlet pipe (10) is internally provided with an electric heating wire (12).
4. The dual-channel pressure stabilizing water heating device according to claim 3, wherein the upper end of the piston block (4) is fixedly connected with a scraping ring (13) through a connecting rod, the position of the scraping ring (13) corresponds to the position of the electric heating rod (3), and the inner diameter of the scraping ring (13) is the same as the diameter of the electric heating rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010007206.2A CN111121272B (en) | 2020-01-04 | 2020-01-04 | Double-channel voltage-stabilizing water heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010007206.2A CN111121272B (en) | 2020-01-04 | 2020-01-04 | Double-channel voltage-stabilizing water heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111121272A CN111121272A (en) | 2020-05-08 |
| CN111121272B true CN111121272B (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010007206.2A Expired - Fee Related CN111121272B (en) | 2020-01-04 | 2020-01-04 | Double-channel voltage-stabilizing water heating device |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206916Y (en) * | 1994-11-09 | 1995-09-06 | 方宝荣 | Voltage-stabilizing device for heating supply pipe system |
| DE19716376A1 (en) * | 1996-04-24 | 1997-10-30 | Huang Tien Tsai | Thermostatic control device for a gas-operated water heater |
| CN2289167Y (en) * | 1997-06-16 | 1998-08-26 | 吴红海 | Water-storage type electric heating shower device with piston |
| CN103335405A (en) * | 2013-07-10 | 2013-10-02 | 镇江市博林光电科技有限公司 | Water flow scale cleaner |
| FR3002493A1 (en) * | 2013-02-28 | 2014-08-29 | Valeo Systemes Thermiques | ELECTRIC HEATER FOR A VEHICLE HEATING CIRCUIT |
| CN203964416U (en) * | 2014-07-01 | 2014-11-26 | 张玉强 | A kind of solar water heater with apparatus for eliminating sludge |
| CN105996786A (en) * | 2016-07-29 | 2016-10-12 | 芜湖艾尔达科技有限责任公司 | Instant-heating temperature-controllable beverage dispenser |
| CN107101363A (en) * | 2017-06-06 | 2017-08-29 | 上海口渡文化传播有限公司 | A kind of double electrical heat tracing water tank boilers of alternately switching |
| DE102017105962A1 (en) * | 2017-03-20 | 2018-09-20 | Christof Schulte-Göbel | heater |
| CN108826661A (en) * | 2018-06-11 | 2018-11-16 | 岳广琴 | A kind of water heater with self-cleaning heat-insulating internal container and heating rod scale function |
| CN208884623U (en) * | 2018-08-17 | 2019-05-21 | 李春宇 | A kind of movable type secondary water-supply device |
| CN209309384U (en) * | 2019-01-23 | 2019-08-27 | 中国港湾工程有限责任公司 | Seawater fresh water dual system fire-fighting switching valve |
| CN110273267A (en) * | 2018-03-16 | 2019-09-24 | 青岛海尔洗衣机有限公司 | Pipeline assembly and clothes treatment device comprising the pipeline assembly |
| WO2019215602A1 (en) * | 2018-05-07 | 2019-11-14 | I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini | Electric heater |
| CN110470047A (en) * | 2019-09-10 | 2019-11-19 | 丰自越 | A kind of multitube pressure stabilizing electric heater |
-
2020
- 2020-01-04 CN CN202010007206.2A patent/CN111121272B/en not_active Expired - Fee Related
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206916Y (en) * | 1994-11-09 | 1995-09-06 | 方宝荣 | Voltage-stabilizing device for heating supply pipe system |
| DE19716376A1 (en) * | 1996-04-24 | 1997-10-30 | Huang Tien Tsai | Thermostatic control device for a gas-operated water heater |
| CN2289167Y (en) * | 1997-06-16 | 1998-08-26 | 吴红海 | Water-storage type electric heating shower device with piston |
| FR3002493A1 (en) * | 2013-02-28 | 2014-08-29 | Valeo Systemes Thermiques | ELECTRIC HEATER FOR A VEHICLE HEATING CIRCUIT |
| CN103335405A (en) * | 2013-07-10 | 2013-10-02 | 镇江市博林光电科技有限公司 | Water flow scale cleaner |
| CN203964416U (en) * | 2014-07-01 | 2014-11-26 | 张玉强 | A kind of solar water heater with apparatus for eliminating sludge |
| CN105996786A (en) * | 2016-07-29 | 2016-10-12 | 芜湖艾尔达科技有限责任公司 | Instant-heating temperature-controllable beverage dispenser |
| DE102017105962A1 (en) * | 2017-03-20 | 2018-09-20 | Christof Schulte-Göbel | heater |
| CN107101363A (en) * | 2017-06-06 | 2017-08-29 | 上海口渡文化传播有限公司 | A kind of double electrical heat tracing water tank boilers of alternately switching |
| CN110273267A (en) * | 2018-03-16 | 2019-09-24 | 青岛海尔洗衣机有限公司 | Pipeline assembly and clothes treatment device comprising the pipeline assembly |
| WO2019215602A1 (en) * | 2018-05-07 | 2019-11-14 | I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini | Electric heater |
| CN108826661A (en) * | 2018-06-11 | 2018-11-16 | 岳广琴 | A kind of water heater with self-cleaning heat-insulating internal container and heating rod scale function |
| CN208884623U (en) * | 2018-08-17 | 2019-05-21 | 李春宇 | A kind of movable type secondary water-supply device |
| CN209309384U (en) * | 2019-01-23 | 2019-08-27 | 中国港湾工程有限责任公司 | Seawater fresh water dual system fire-fighting switching valve |
| CN110470047A (en) * | 2019-09-10 | 2019-11-19 | 丰自越 | A kind of multitube pressure stabilizing electric heater |
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| Publication number | Publication date |
|---|---|
| CN111121272A (en) | 2020-05-08 |
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Effective date of registration: 20211018 Address after: 322200 No. 5, District 8, Fengchan village, Zhengzhai Town, Pujiang County, Jinhua City, Zhejiang Province Applicant after: Zheng Junfeng Address before: 450001 new campus of Zhengzhou University, No.100, science Avenue, high tech Zone, Zhengzhou City, Henan Province Applicant before: Shack |
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Effective date of registration: 20221123 Address after: 276000 west head of Shuhe street, Linshu County, Linyi City, Shandong Province Patentee after: Linshu Jicai Human Resources Service Co.,Ltd. Address before: 322200 No. 5, District 8, Fengchan village, Zhengzhai Town, Pujiang County, Jinhua City, Zhejiang Province Patentee before: Zheng Junfeng |
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Granted publication date: 20211105 |