CN209524638U - A kind of gas heater - Google Patents
A kind of gas heater Download PDFInfo
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- CN209524638U CN209524638U CN201822280049.3U CN201822280049U CN209524638U CN 209524638 U CN209524638 U CN 209524638U CN 201822280049 U CN201822280049 U CN 201822280049U CN 209524638 U CN209524638 U CN 209524638U
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- heat
- exchange component
- burner
- reflecting plate
- board
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Abstract
The utility model discloses a kind of gas heaters, including combustion heat-exchange component, blower, air exhaust passage and reflective insulation device, wherein, combustion heat-exchange component includes burner and heat exchanger, the lower part of heat exchanger is arranged in burner, the inside outer wall of combustion heat-exchange component is equipped with reflective insulation device, and covering burner and heat exchanger from bottom to top, the hot gas that burner generates can encounter the middle part that reflective insulation device is reflected into combustion heat-exchange component, blower is equipped in the lower part of combustion heat-exchange component, the top of combustion heat-exchange component is equipped with air exhaust passage, wind is sent into combustion heat-exchange component by blower to be blowed to heat exchanger for the hot gas for gathering at middle part upwards and heats to heat exchanger, it is discharged again by air exhaust passage, simultaneously, heat insulation path is additionally provided in reflective insulation device, its internal hot gas can also be sent at heat exchanger by wind by heat insulation path.
Description
Technical field
The utility model relates to technical field of water heaters, especially a kind of gas heater.
Background technique
Currently, gas heater reaches the maximization utilized for the heat for generating burner, it is by firing mostly
The indoor setting of burning prevents heat loss by the insulating frame that insulation heat-barrier material forms, although playing heat-insulated effect,
The specific heat capacity of many heat-barrier materials is larger, and storage a large amount of heat can be also absorbed while heat-insulated, and the heat absorbed can not
Dissipation is just hoarded in the combustion chamber, in water heater start and stop, be will lead to water temperature and is continued to increase, when opening water heater again,
Leaving water temperature is excessively high, will cause undesirable user experience.
Utility model content
The insulating frame being made of heat-insulating material is arranged in portion to existing gas heater in the combustion chamber, although playing heat-insulated
Purpose, but heat-insulating material can absorb heat and hoard portion in the combustion chamber, the water outlet after causing water heater start and stop in this way
Temperature is higher, leads to undesirable user experience.
To overcome the above deficiency, the utility model adopts the following technical solution:
A kind of gas heater, including combustion heat-exchange component, the inside of the combustion heat-exchange component are equipped with burner and change
Hot device, the burner are located at the lower part of the heat exchanger, which is characterized in that the inside outer wall of the combustion heat-exchange component is equipped with
Reflective insulation device, the covering burner and heat exchanger of the reflective insulation device from bottom to top, the combustion heat-exchange group
The lower part of part is equipped with blower, and the top of the combustion heat-exchange component is equipped with air exhaust passage, and wind is sent to the combustion by the blower
It burns in heat-exchanging component, the heat that the burner generates is blowed into the heat exchanger upwards, then be discharged by the air exhaust passage.
In the inside of combustion heat-exchange component, combustion chamber is formed between burner and heat exchanger, in burner operation, is located at
The blower of burner lower part is blown upwards, and the hot gas assembled in combustion chamber is sent to heat exchanging device at heat exchanger and is heated, Zhi Houre
Gas is discharged by air exhaust passage again.Wherein, the covering burner and heat exchanger of reflective insulation device from bottom to top, in this way in hot gas
When spreading to outer wall, reflective insulation device can be encountered to be reflected into combustion chamber, and be brought to the centre around burner
Region, then as the wind that blower is sent out is sent at heat exchanger, the thermal efficiency is so improved, while being also prevented from combustion heat-exchange group
Part outer wall absorbs heat, plays heat-insulated effect.
Further, the reflective insulation device includes reflecting plate, and the reflecting plate is located at the burner and the combustion
Between the outer wall for burning heat-exchanging component, the reflecting plate forms reflecting surface towards the side of the burner.
In the hot gas that burner generates to when external diffusion, the reflecting surface of reflecting plate can be encountered, by reflective surface to combustion
The middle part of heat-exchanging component is burnt, and the hot gas gathered in the middle part of combustion heat-exchange component is sent at heat exchanger upwards together, it is bigger in this way
Scattering and disappearing for heat is reduced in degree, improves heat exchange efficiency.
Further, there is the first heat insulation path, institute between the reflecting plate and the outer wall of the combustion heat-exchange component
The wind for stating blower flows through first heat insulation path from bottom to top, and is discharged by the air exhaust passage.
Reflecting plate also has hot gas and is attached on reflecting plate while reflecting hot gas, in this way the first heat insulation path of setting, will
The outer wall of hot gas and combustion heat-exchange component, which is spaced, to be come, and heat-blocking action is played.Meanwhile between reflecting plate and the first heat insulation path
There can be hot gas, when blower is started to work, wind passes upward through the first heat insulation path from the lower part of combustion heat-exchange component, will reflect
Heat of depositing inside heat and the first heat insulation path on plate is all taken at heat exchanger, and hot gas is further carried out benefit in this way
With, improve the thermal efficiency in this way, while also being radiated to reflective insulation device, can be avoided in this way water heater stopping open again
The higher situation of leaving water temperature occurs when dynamic.
Further, at least one thermal insulation board is additionally provided in the reflective insulation device, the thermal insulation board is located at described
It is heat-insulated logical that second is formed between reflecting plate and the outer wall of the combustion heat-exchange component, between the thermal insulation board and the reflecting plate
Road.
The second heat insulation path is formd between thermal insulation board and reflecting plate, further enhances heat insulation, in reflecting plate
It is divided into two channels between combustion heat-exchange component outer wall and also improves heat dissipation effect in channel.
Further, what the thermal insulation board and the reflecting plate were integrally bent to form up and down is described second heat-insulated logical
Road.
Reflective insulation device can be to carry out being bent to form reflecting plate and thermal insulation board by one piece of panel, then in reflecting plate
The gap formed between thermal insulation board is exactly the second heat insulation path, and the integraty for improving reflective insulation device is arranged in this way,
It ensure that the intensity of reflective insulation device.
Further, the thermal insulation board is provided with multi-disc, and it is heat-insulated logical that described second is formed between thermal insulation board described in multi-disc
Road has between the thermal insulation board and the reflecting plate and between thermal insulation board described in multi-disc and forms second heat insulation path
Support construction.
Between reflecting plate and the outer wall of combustion heat-exchange component can be equipped with multiple thermal insulation boards, between thermal insulation board and reflecting plate and
The support construction for being used to be spaced apart from each other is equipped between thermal insulation board and thermal insulation board, in this way between thermal insulation board and reflecting plate, thermal insulation board
It is formed the second heat insulation path between thermal insulation board, further enhances heat insulation.
Further, the reflecting plate towards the burner be coated on one side high luminescent material or for smooth mirror surface with
Form the reflecting surface.
Being coated with high luminescent material in the reflecting surface of reflecting plate makes reflecting surface that reflecting surface are made into mirror surface in wet look or directly,
Reflecting effect is enhanced in this way, by the hot gas middle part as much as possible for being reflected into combustion heat-exchange component, is reduced thermal loss, is promoted
The thermal efficiency.
Further, the bottom of the combustion heat-exchange component is equipped with the air inlet for connecting the blower, the air inlet with
Isolation board is equipped between the burner, the isolation board is equipped with several air inlet holes, and the reflective insulation device is located at described
The top of isolation board.
Blower is located at the air inlet of combustion heat-exchange component bottom, makes wind being sent at heat exchanger from bottom to top.Work as blower
When work, hot gas is generated in combustion chamber, the hot gas for having part is spread around, this part hot gas can encounter reflective insulation device
To be reflected into the middle part of combustion heat-exchange component, heat exchanger can be sent to by the wind of air inlet hole by gathering the hot gas at middle part
Place.Meanwhile also having part wind and can pass through reflective insulation device from bottom to top, internal hot gas is passed at heat exchanger, is subtracted
Few thermal loss, promotes the thermal efficiency.
Further, the outer wall of the combustion heat-exchange component includes cover and cover board, and the reflective insulation device includes position
The first reflective insulation device on the inside of cover longitudinal side wall and the second reflective insulation device on the inside of cover board, described first
Reflective insulation device is in U-shape, and the second reflective insulation device is in plate shaped.
The first reflective insulation device and the second reflective insulation device are equipped between combustion heat-exchange component and burner, first is anti-
It penetrates heat-proof device and is in U-shape and be centered around around cover, the second reflective insulation device is in the plate shaped inside for being located at cover board, in this way,
In combustion heat-exchange component all around around setting reflective insulation device, it can accomplish comprehensive reflection hot gas and prevent heat-insulated.
Meanwhile reflective insulation device is provided separately in the outer wall of combustion heat-exchange component, when dismantling cover board in this way, maintenance burning is facilitated to change
Hot component.
Further, the first reflective insulation device of the U-shaped is integrated bending forming；Alternatively, the first of the U-shaped
Reflective insulation device is formed by multi-disc flat plate splicing.
The first reflective insulation device for being in U-shape can be to be bent to form by one piece of panel, improve in this way reflection every
The integraty of hot component also ensures the intensity of reflective insulation device, is also possible to be formed by multi-disc panel splicing, in this way
Simplify the manufacture craft of reflective insulation device.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawing:
Fig. 1 is the schematic diagram of the utility model gas heater main body；
Fig. 2 is the diagrammatic cross-section of the utility model gas heater main body；
Fig. 3 is scheme of installation of the utility model reflective insulation device in combustion heat-exchange component；
Fig. 4 is the scheme of installation of the utility model reflecting plate and thermal insulation board；
Fig. 5 is the utility model integral type reflective insulation schematic device；
Fig. 6 is the gas heater main body schematic diagram of the utility model embodiment two.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen
The feature in embodiment and embodiment please can be combined with each other.
Many details are explained in the following description in order to fully understand the utility model, still, this is practical
Novel to be implemented using other than the one described here other modes, therefore, the protection scope of the utility model is simultaneously
It is not limited by the specific embodiments disclosed below.
Embodiment one
As depicted in figs. 1 and 2, a kind of gas heater, including combustion heat-exchange component, the combustion heat-exchange component include combustion
Burner 2 and heat exchanger 3, the burner 2 are located at the lower section of the heat exchanger 3, and burning is formed between the heat exchanger 3
Room, the bottom air inlet mouth of the combustion heat-exchange component, the air inlet are connected with blower 1, the air inlet and the burner 2
Between be equipped with isolation board 10, several air inlet holes 12 are additionally provided on the isolation board 10, the top of the heat exchanger 3 be equipped with row
Wind channel 4, in burner operation, the wind of blower blowout passes through isolation board and enters in combustion chamber, by what is generated in combustion chamber
Hot gas is sent to upwards at heat exchanger to be heated to heat exchanger, is finally discharged again by air exhaust passage.
The inside outer wall of the combustion heat-exchange component is equipped with reflective insulation device, and the reflective insulation device is arranged described
The top of isolation board 10, and the covering burner 2 and the heat exchanger 3 from bottom to top are expanded in hot gas towards outer wall in this way
When dissipating, hot gas can be reflected into the middle part of combustion chamber by reflective insulation device, be sent at heat exchanger, exchanged heat then as wind
The heat supply of device.The hot gas that the setting of reflective insulation device will diffuse into combustion heat-exchange component surrounding is reflected into the middle part of burner,
And as the hot gas at middle part is sent at heat exchanger together, reduces thermal loss, improve the thermal efficiency, while also having blocked heat
Gas is contacted with outer wall, causes bad user experience.
The outer wall of the combustion heat-exchange component includes the cover 8 and cover board 9 around combustion heat-exchange component setting.At this
In embodiment, the longitudinal side wall of the cover 8 is equipped with the first reflective insulation device 5 of U-shaped.The cover board 9 is equipped with plate shaped
The second reflective insulation device 6, the longitudinal side wall of the cover 8 is equipped with the second reflective insulation device 6 of U-shaped.It is burning in this way
The whole setting reflective insulation devices of the surrounding of heat-exchanging component, can be reflecting towards the hot gas that surrounding is spread and be brought to combustion chamber
Middle part, during blower is blown upwards, can it is as much as possible by burner generate hot gas be sent at heat exchanger into
Row heating, reduces thermal loss, improves the thermal efficiency.Certainly, reflective insulation device also may be mounted at the side of cover, two sides
Or three sides, it can equally play the role of reflective insulation.Meanwhile described second is separately provided instead in the inside of the cover board 9
Heat-proof device 6 is penetrated, combustion heat-exchange component can be directly contacted when opening cover board, facilitate maintenance.
The reflective insulation device is equipped with reflecting plate, and the reflecting plate is located at the burner 2 and the combustion heat-exchange group
Between the outer wall of part, the reflecting plate towards the burner 2 one side be reflecting surface, the reflecting surface be coated with high luminescent material or
Reflecting surface described in person is formed by smooth mirror surface, enhances reflecting effect in this way, being capable of reflection hot gas as much as possible.It is described
At least one thermal insulation board is additionally provided in reflective insulation device, the thermal insulation board is located at the reflecting plate and the combustion heat-exchange component
Outer wall between.Wherein, reflecting plate and thermal insulation board can be discrete item, then by being fixedly connected to form reflective insulation device；
Alternatively, reflecting plate and thermal insulation board are also possible to be bent to form by a panel.
As described in Fig. 2 and Fig. 3, in the present embodiment, set between the reflecting plate and the heat-exchanging component there are two heat-insulated
Plate is equipped with the first reflective insulation device 5 around the cover 8, and the first reflective insulation device 5 includes reflecting plate 5-1, heat-insulated
Plate 5-2 and thermal insulation board 5-3 is equipped with the second reflective insulation shape on the inside of the cover board 9 and sets 6, and the second reflective insulation device 6 wraps
Include reflecting plate 6-1, thermal insulation board 6-2 and thermal insulation board 6-3.The reflecting plate 5-1 and thermal insulation board 5-2 and thermal insulation board 5-2
It is separated with the second heat insulation path respectively between the thermal insulation board 5-3, in burner operation, hot gas is full of in combustion chamber, although
In the middle part of the hot gas to combustion chamber of reflecting plate meeting reflective portion, but heat can stay on reflecting plate, in this way in user's start and stop hot water
Hot gas, which may be discharged, when device, on reflecting plate causes water temperature to rise, and when user is again turned on water heater, will lead to leaving water temperature mistake
Height sets in this way there are two the second heat insulation path between reflecting plate and combustion heat-exchange component outer wall, in blower work, blows air over
Second heat insulation path takes its internal heat at heat exchanger to, can not only play the role of heat dissipation to reflective insulation device,
Heat-insulated effect is played to the outer wall of combustion heat-exchange component, can also be heated to heat exchanger, be improved the thermal efficiency.Likewise, institute
The inside for stating the second reflective insulation device 6 also is provided with the second heat insulation path and used baffle reflection hot gas to combustion heat-exchange
The middle part of component, as the hot gas at middle part is sent at heat exchanger together, while some wind can be heat-insulated logical by second
Road takes its internal hot gas at heat exchanger to, is thermally shielded in this way and mode radiate and the first reflective insulation device 5
It is identical, be not just described in detail one by one here.
As shown in Figure 1 and Figure 4, in the present embodiment, it is anti-for being located at the second reflective insulation device 6 of 9 inside of cover board
It penetrates plate and mutually fixes formation with thermal insulation board, the reflecting plate 6-1 is equipped with fixed part 6-11, institute towards the thermal insulation board 6-2 on one side
State the fixinig plate 6-112, the fixinig plate 6- that fixed part 6-11 includes protrusion 6-111 and connection protrusion protruding upward
112 are equipped with through-hole, and the thermal insulation board 6-2 is equipped with the fixation hole 6-22 of position opposite with the fixed part 6-11.It is worn by screw
The fixed part 6-11 and the fixation hole 6-22 are crossed, and then the reflecting plate 6-1 and the thermal insulation board 6-2 phase are fixed, together
When protrusion setting also ensure and be equipped with the second heat insulation path between the reflecting plate and thermal insulation board of the second reflective insulation device.Institute
State thermal insulation board 6-2 and be equipped with support edge 6-21 on one side towards the thermal insulation board 6-3, the support edge 6-21 it is in T shape to it is described every
Hot plate 6-3 protrusion setting, is equipped with the blocked hole of opposite position, institute on the second thermal insulation board 6-3 of the second reflective insulation device
It states support edge 6-21 and is stuck in the fixation for completing the thermal insulation board 6-2 and the thermal insulation board 6-3 in the blocked hole, while being also spaced
The second heat insulation path is gone out.The thermal insulation board 6-3 is towards the mounting portion 6- for being additionally provided with protrusion on the side wall of 9 one side of cover board
31, through-hole 91 is equipped on the opposite position of the cover board 9, and in the side that the cover 8 is connect with the cover board
Relative position also is provided with mounting hole 81, passes through the through-hole 91, the mounting portion 6-31 and the installation by screw in this way
The cover board 9, the second reflective insulation device 6 are fixed together by hole 81 together with the cover 8, have both completed so anti-
Penetrate the fixation of heat-proof device and cover board, at the same with the fixation that completes cover board and cover.Certainly, between reflecting plate and thermal insulation board
Fixation is not limited only to both the above method, and screw can also be directly punched through on panel and fixes or is consolidated by welding
It is fixed.
As shown in figure 5, reflective insulation device can also be bent to form reflecting plate and thermal insulation board shape by one piece of panel
Integrated reflective insulation device, the integral type reflective insulation device 7 are equipped with support portion 71, will by the support portion 71
Reflective insulation device is fixed on the inside of combustion heat-exchange component outer wall, and fixed form therein can be clamping, welding or logical
Cross screw fixation etc..
Embodiment two
As shown in fig. 6, the present embodiment and embodiment one the difference is that, in the present embodiment, the reflective insulation dress
Set 6 and be provided only with reflecting plate, then the reflecting plate is located between the burner and the outer wall of the combustion heat-exchange component, also with institute
It states and is equipped with first heat-insulated logical 11 between the outer wall of combustion heat-exchange component, when burner is started to work, be full of hot gas in combustion chamber,
Hot gas can encounter reflecting plate when spreading towards surrounding, and hot gas is reflected into the middle part of combustion chamber by reflecting plate, reduce heat damage
It loses, when blower is blown upwards, the hot gas gathered in combustion heat-exchange component can be sent at heat exchanger, meanwhile, reflecting plate
Also heat can be absorbed, is also had in this way in heat insulation path there are hot gas, bottom-up first heat insulation path that passes through of wind will be attached to instead
It penetrates hot gas and the hot gas being present in heat insulation path on plate to be sent at heat exchanger together, reflective insulation device is radiated,
This avoid improve the thermal efficiency.
The preferred embodiment of the utility model has already been described in detail above, it should be appreciated that reading the utility model
After above-mentioned teaching content, those skilled in the art can be made various changes or modifications the utility model.Such equivalent forms
It also falls within the scope of the appended claims of the present application.
Claims (10)
1. the inside of a kind of gas heater, including combustion heat-exchange component, the combustion heat-exchange component is equipped with burner and heat exchange
Device, the burner are located at the lower part of the heat exchanger, which is characterized in that the inside outer wall of the combustion heat-exchange component is equipped with anti-
Penetrate heat-proof device, the covering burner and heat exchanger of the reflective insulation device from bottom to top, the combustion heat-exchange component
Lower part be equipped with blower, the top of the combustion heat-exchange component is equipped with air exhaust passage, and wind is sent to the burning by the blower
In heat-exchanging component, the heat that the burner generates is blowed into the heat exchanger upwards, then be discharged by the air exhaust passage.
2. a kind of gas heater according to claim 1, which is characterized in that the reflective insulation device includes reflection
Plate, the reflecting plate are located between the burner and the outer wall of the combustion heat-exchange component, and the reflecting plate is towards the combustion
The side of burner forms reflecting surface.
3. a kind of gas heater according to claim 2, which is characterized in that the reflecting plate and the combustion heat-exchange group
There is the first heat insulation path, the wind of the blower flows through first heat insulation path from bottom to top, and by institute between the outer wall of part
State air exhaust passage discharge.
4. a kind of gas heater according to claim 2, which is characterized in that be additionally provided in the reflective insulation device to
A few thermal insulation board, the thermal insulation board are located between the reflecting plate and the outer wall of the combustion heat-exchange component, the thermal insulation board
The second heat insulation path is formed between the reflecting plate.
5. a kind of gas heater according to claim 4, which is characterized in that the thermal insulation board and reflecting plate one
Bending forms second heat insulation path up and down.
6. a kind of gas heater according to claim 4, which is characterized in that the thermal insulation board is provided with multi-disc, multi-disc
Second heat insulation path is formed between the thermal insulation board, it is heat-insulated between the thermal insulation board and the reflecting plate and described in multi-disc
There is the support construction for forming second heat insulation path between plate.
7. a kind of gas heater according to claim 2, which is characterized in that the reflecting plate is towards the burner
Be coated on one side high luminescent material or for smooth mirror surface to form the reflecting surface.
8. a kind of gas heater according to claim 1, which is characterized in that the bottom of the combustion heat-exchange component is equipped with
The air inlet of the blower is connected, isolation board is equipped between the air inlet and the burner, if the isolation board is equipped with
Dry air inlet hole, the reflective insulation device are located at the top of the isolation board.
9. a kind of gas heater according to claim 1-8, which is characterized in that the combustion heat-exchange component
Outer wall includes cover and cover board, and the reflective insulation device includes the first reflective insulation device on the inside of cover longitudinal side wall
And the second reflective insulation device on the inside of cover board, the first reflective insulation device are in U-shape, the second reflective insulation dress
It sets in plate shaped.
10. a kind of gas heater according to claim 9, which is characterized in that the first reflective insulation device of the U-shaped
It is integrated bending and forming；Alternatively, the first reflective insulation device of the U-shaped is formed by multi-disc flat plate splicing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822280049.3U CN209524638U (en) | 2018-12-29 | 2018-12-29 | A kind of gas heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822280049.3U CN209524638U (en) | 2018-12-29 | 2018-12-29 | A kind of gas heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209524638U true CN209524638U (en) | 2019-10-22 |
Family
ID=68228240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822280049.3U Active CN209524638U (en) | 2018-12-29 | 2018-12-29 | A kind of gas heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209524638U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113310216A (en) * | 2021-06-15 | 2021-08-27 | 上海林内有限公司 | Combustion system of gas water heater using heat exchanger without body |
| CN113375338A (en) * | 2021-07-23 | 2021-09-10 | 李军 | Combustion heat exchange water heater |
| CN113390187A (en) * | 2021-06-15 | 2021-09-14 | 上海林内有限公司 | Heat exchanger of domestic gas water heater |
| WO2022152278A1 (en) * | 2021-01-15 | 2022-07-21 | 芜湖美的厨卫电器制造有限公司 | Gas apparatus and gas water heater |
-
2018
- 2018-12-29 CN CN201822280049.3U patent/CN209524638U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022152278A1 (en) * | 2021-01-15 | 2022-07-21 | 芜湖美的厨卫电器制造有限公司 | Gas apparatus and gas water heater |
| CN113310216A (en) * | 2021-06-15 | 2021-08-27 | 上海林内有限公司 | Combustion system of gas water heater using heat exchanger without body |
| CN113390187A (en) * | 2021-06-15 | 2021-09-14 | 上海林内有限公司 | Heat exchanger of domestic gas water heater |
| CN113375338A (en) * | 2021-07-23 | 2021-09-10 | 李军 | Combustion heat exchange water heater |
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Effective date of registration: 20230523 Address after: Building 2, No. 52, 22nd Street, Baiyang Street, Qiantang New District, Hangzhou City, Zhejiang Province, 310000 Patentee after: Hangzhou Jiuchuang Home Appliances Co.,Ltd. Address before: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee before: JOYOUNG Co.,Ltd. |