CN112797611B - Ground heating system - Google Patents
Ground heating system Download PDFInfo
- Publication number
- CN112797611B CN112797611B CN202011238814.0A CN202011238814A CN112797611B CN 112797611 B CN112797611 B CN 112797611B CN 202011238814 A CN202011238814 A CN 202011238814A CN 112797611 B CN112797611 B CN 112797611B
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- Prior art keywords
- air
- air supply
- skirting line
- return
- pipeline
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 22
- 230000017525 heat dissipation Effects 0.000 claims description 17
- 238000009423 ventilation Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F13/075—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser having parallel rods or lamellae directing the outflow, e.g. the rods or lamellae being individually adjustable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Central Heating Systems (AREA)
- Floor Finish (AREA)
Abstract
The application discloses a ground heating system, which comprises an air supply assembly, a first air supply pipe and a second air supply pipe, wherein the air supply assembly comprises an air supply pipeline paved along a first indoor wall; the hollow metal floor assembly comprises an air inlet end and an air return end, and the air inlet end is connected with the air supply pipeline; the air return end is connected with an air return pipeline formed on the indoor second wall body; skirting line subassembly, the skirting line subassembly includes air supply skirting line and return air skirting line. The ground heating system provided by the application has the advantages of simple and reasonable structure and convenience in installation and use. The air supply pipeline can be utilized to supply hot air in the air outlet of the central air conditioner through the air supply hose and the air supply pipeline, and according to the opening state of the special skirting line, low-level heat supply can be carried out according to three states, so that the hot air is accumulated from the indoor low position, the heating effect is good, the use comfort level is high, the heat conversion efficiency is improved, and the energy conservation and the environmental protection are realized. And the three heating modes can be flexibly switched according to the needs, so that the applicability is strong.
Description
Technical Field
The invention relates to the technical field of heating equipment, in particular to a ground heating system capable of realizing switching of three heating states.
Background
As is well known, compared with the heat radiation fin heating mode, the floor radiant heating is widely applied due to the characteristic that the floor radiant heating accords with the development of the building energy-saving technology. Specifically, the whole ground is uniformly heated by the heating medium in the floor, and the heating purpose is achieved by conducting from bottom to top by utilizing the law of ground radiation.
The traditional floor heating adopts water floor heating or electric floor heating, needs a separate heating system, has complex construction, high manufacturing cost, easy occurrence of quality hidden troubles such as water leakage and the like, and is extremely difficult to maintain. In addition, in the conventional floor heating system using hot water, a metal or synthetic resin material drain pipe is mainly buried underground, and water is heated by a heat source generated by a boiler installed indoors or outdoors, so that a heat medium circulation is established. The method is limited by the buried pipeline in concrete construction, when a water leakage fault occurs, a correct water leakage point cannot be easily found, the repair is convenient even if the water leakage point is found, and the construction cost is high.
The leakage problem that traditional water heating exists can be effectively avoided by adopting air conditioning heat, but because the central air conditioner and the hanging air conditioner are higher in air outlet position, hot air is blown out from the top air outlet under a heating mode, and the heated air is influenced by the rising physical property and is suspended at the indoor top, so that the indoor space is high in top temperature and low in bottom temperature, the head and the foot of people are cold, the use feeling is poor, and the heating mode is wasteful in energy consumption and low in heat conversion rate.
Disclosure of Invention
The invention provides a ground heating system.
The invention provides the following scheme:
a floor heating system comprising:
The air supply assembly comprises an air supply pipeline paved along the first indoor wall;
the hollow metal floor assembly comprises an air inlet end and an air return end, and the air inlet end is connected with the air supply pipeline; the air return end is connected with an air return pipeline formed on the indoor second wall body;
The skirting line assembly comprises an air supply skirting line and an air return skirting line, the air supply skirting line is connected with the first wall and communicated with the air supply pipeline, and the air return skirting line is connected with the second wall and communicated with the air return pipeline; the air supply skirting line and the return air skirting line are respectively connected with movable shutters capable of being opened and closed in a rotating mode.
Preferably: and heat insulation layers are respectively formed on two sides of the air supply pipeline.
Preferably: and a panel layer is formed on the surface of the heat preservation layer far away from the first wall body and the surface of the second wall body.
Preferably: the top of each air supply skirting line and each return air skirting line is fixedly connected with the fixing piece which is connected with the first wall body and the second wall body in a clamping mode, and the bottom of each air supply skirting line and each return air skirting line is connected with the first wall body and the second wall body through screws respectively. .
Preferably: the fixing piece is connected with the wall body through a screw.
Preferably: the movable shutter contained in the air supply skirting line can be switched among three position states, wherein the three position states comprise a first position state, a second position state and a third position state, and the first position state is used for closing a vent of the air supply skirting line so that all hot air enters the hollow metal floor assembly and is discharged by the air return skirting line; the second position state is used for partially opening the ventilation opening of the air supply skirting line, so that part of hot air enters the hollow metal floor assembly and is discharged by the air return skirting line, and the other part of hot air is discharged by the ventilation opening of the air supply skirting line; the third position state is used for blocking the air supply channel so that all hot air is discharged from the ventilation openings of the air supply skirting line.
Preferably: when the movable shutter contained by the air supply skirting line is in a first position state and a second position state, the movable shutter contained by the air return skirting line is in an open state, and when the movable shutter contained by the air supply skirting line is in a third position state, the movable shutter contained by the air return skirting line is in a closed state.
Preferably: the hollow metal floor assembly comprises a heat dissipation floor assembly, and the heat dissipation floor assembly is respectively connected with the air supply pipeline and the return air pipeline.
Preferably: the heat dissipation floor assembly comprises a heat dissipation floor plug and a heat dissipation floor slot, wherein the heat dissipation floor plug is connected with the air supply slot at the bottom of the air supply pipeline, and the heat dissipation floor slot is connected with the air return plug at the bottom of the air return pipeline.
Preferably: the air supply assembly comprises an air conditioner fan, and an air outlet of the air conditioner fan is connected with an air supply pipeline through a hose.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
By the application, a floor heating system can be realized, and in one implementation, the system can comprise an air supply assembly, wherein the air supply assembly comprises an air supply pipeline paved along a first indoor wall; the hollow metal floor assembly comprises an air inlet end and an air return end, and the air inlet end is connected with the air supply pipeline; the air return end is connected with an air return pipeline formed on the indoor second wall body; the skirting line assembly comprises an air supply skirting line and an air return skirting line, the air supply skirting line is connected with the first wall and communicated with the air supply pipeline, and the air return skirting line is connected with the second wall and communicated with the air return pipeline; the air supply skirting line and the return air skirting line are respectively connected with movable shutters capable of being opened and closed in a rotating mode. The ground heating system provided by the application has the advantages of simple and reasonable structure and convenience in installation and use. The air supply pipeline can be utilized to supply hot air in the air outlet of the central air conditioner through the air supply hose and the air supply pipeline, and according to the opening state of the special skirting line, low-level heat supply can be carried out according to three states, so that the hot air is accumulated from the indoor low position, the heating effect is good, the use comfort level is high, the heat conversion efficiency is improved, and the energy conservation and the environmental protection are realized. And the three heating modes can be flexibly switched according to the needs, so that the applicability is strong.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a first structure of a ground heating system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second structure of a ground heating system according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a third structure of a ground heating system according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a fixing member according to an embodiment of the present invention;
Fig. 5 is a schematic view of a fastener installation process according to an embodiment of the present invention.
In the figure: air supply pipeline 1, cavity metal floor assembly 2, return air pipeline 3, air supply skirting line 4, movable tripe 41 that the air supply skirting line contained, return air skirting line 5, movable tripe 51 that the return air skirting line contained, first wall body 6, second wall body 7, heat preservation 8, panel layer 9, air conditioner fan 10, hose 11, mounting 12.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
Examples
Referring to fig. 1, 2, 3, 4 and 5, a floor heating system according to an embodiment of the present invention, as shown in fig. 1, 2 and 3, includes an air supply assembly including an air supply duct 1 laid along an indoor first wall 6; the air supply duct can be used as a part of a wall body, and the air supply duct can be fully distributed on the surface of the wall body along the width direction of the wall body during manufacturing. In order to prevent the heat loss of the air supply duct, a heat insulation layer 8 is formed around the air supply duct 1. In order to achieve the decorative effect at the wall surface of the system, a panel layer 9 is formed on the surface of the heat insulation layer far away from the first wall body and the surface of the second wall body. The panel layer may be a decorative panel layer having a decorative pattern. Specifically, the air supply assembly comprises an air conditioner fan 10, and an air outlet of the air conditioner fan 10 is connected with the air supply pipeline 1 through a hose 11.
The hollow metal floor assembly 2 comprises an air inlet end and an air return end, and the air inlet end is connected with the air supply pipeline 1; the return air end is connected with a return air pipeline 3 formed on the indoor second wall 7; the hollow metal flooring assembly may be disposed on an upper portion of the ground insulation layer. Specifically, the hollow metal floor assembly comprises a heat dissipation floor assembly, and the heat dissipation floor assembly is respectively connected with the air supply pipeline and the return air pipeline. The heat dissipation floor assembly comprises a heat dissipation floor plug and a heat dissipation floor slot, wherein the heat dissipation floor plug is connected with the air supply slot at the bottom of the air supply pipeline, and the heat dissipation floor slot is connected with the air return plug at the bottom of the air return pipeline. The system can be spliced and installed according to the size and the shape of the ground to be paved, and has high speed, integral heat dissipation and good attractive effect.
Skirting line subassembly, the skirting line subassembly includes air supply skirting line 4 and return air skirting line 5, air supply skirting line 4 with first wall body 6 links to each other and with air supply pipeline 1 switches on. The return air skirting line 5 is connected with the second wall 7 and communicated with the return air pipeline 3; the air supply skirting line 4 and the return air skirting line 5 are respectively connected with movable shutters which can be opened and closed in a rotating way.
In practical application, in order to make things convenient for the skirting line fixed with the wall body, supply air skirting line 4 with the respective top of return air skirting line 5 respectively with first wall body 6 with the mounting 12 card that second wall body 7 links to each other is fixedly connected, supply air skirting line 4 with the respective bottom of return air skirting line 5 respectively through the screw with first wall body 6 with second wall body 7 links to each other. The fixing piece is connected with the wall body through a screw. The mounting process of the skirting line comprises the step of taking the mounting of the air supply skirting line as an example. As shown in fig. 5a, 1, mounting fixture: the fixing piece is arranged on the wall surface by bolts. As shown in fig. 5b, 2, plug skirting line: the skirting line is inserted into the fixing piece from top to bottom. As shown in fig. 5 c, 3, movable shutter: pressing and opening the movable shutter, and exposing the inner screw hole after the movable shutter rotates. As shown in fig. 5 d, 4, mounting screws: through the mounting hole, fix skirting line in the wall with the screw.
The system provided by the application can realize heating in three different modes, in particular, the movable shutter 41 contained in the air supply skirting line can be switched among three position states, wherein the three position states comprise a first position state, a second position state and a third position state, as shown in fig. 1, the first position state is used for closing a vent of the air supply skirting line 4 so that all hot air enters the hollow metal floor assembly 2 and is discharged by the return air skirting line 5; as shown in fig. 2, the second position is used for partially opening the ventilation opening of the air supply skirting line 4, so that a part of hot air enters the hollow metal floor assembly 2 and is discharged by the air return skirting line 5, and the other part of hot air is discharged by the ventilation opening of the air supply skirting line 4; as shown in fig. 3, the third position is used for blocking the air supply channel 1 and discharging all the hot air from the ventilation openings of the air supply skirting line 4. Specifically, when the movable shutter contained in the air supply skirting line is in a first position state and a second position state, the movable shutter contained in the air return skirting line is in an open state, and when the movable shutter contained in the air supply skirting line is in a third position state, the movable shutter contained in the air return skirting line is in a closed state.
The first heating mode is floor heating, the air supply end skirting line is closed, the air return end skirting line is opened, at this time, the air conditioner hot air is blown out from the opening fan of the air return end skirting line through the air supply hose, the air supply pipeline, the hollow metal floor and the air return pipeline, and returns to the air conditioner air return port. The state uses the hollow metal floor as a main fan heat source, can realize the effect of ground heating, dissipates heat on the ground, has high comfort level, but has slower heating speed than skirting line heating in a transition state. Meanwhile, the problem that the traditional central air conditioner is poor in heat comfort level and low in heat conversion efficiency is solved.
The second heating mode is double heating, the air supply end skirting line and the air return end skirting line are moderately opened at a certain angle, at this time, after the air conditioner hot air passes through the air supply hose and the air supply pipeline, part of the air conditioner hot air is blown out from the opening fan of the air supply end skirting line and returns to the air conditioner air return port, and the other part of the air conditioner hot air passes through the hollow metal floor and the air return pipeline and is blown out from the opening fan of the air return end skirting line and returns to the air conditioner air return port. The distribution amount of the hot air in the two ways is changed according to the opening angles of skirting lines at two ends. The state is characterized in that part of hot air is blown out from the skirting line directly, so that the time for improving the indoor temperature is shortened, and part of hot air flows through the hollow metal floor to keep the floor warm, and the state of floor heating and skirting line heating is a compromise. Meanwhile, the problem that the traditional central air conditioner is poor in heat comfort level and low in heat conversion efficiency is solved.
The third heating mode is skirting line heating, opening the air supply end skirting line, blocking the air supply channel entering the hollow metal floor and closing the air return end skirting line, at this time, the air conditioner hot air is blown out from the opening fan of the air supply end skirting line through the air supply hose and the air supply pipeline, and returns to the air conditioner air return opening. The state is characterized in that the indoor temperature is rapidly increased by rapidly blowing hot air from the skirting line. Meanwhile, the problem that the traditional central air conditioner is poor in heat comfort level and low in heat conversion efficiency is solved.
In a word, the ground heating system provided by the application has a simple and reasonable structure and is convenient to install and use. The air supply pipeline can be utilized to supply hot air in the air outlet of the central air conditioner through the air supply hose and the air supply pipeline, and according to the opening state of the special skirting line, low-level heat supply can be carried out according to three states, so that the hot air is accumulated from the indoor low position, the heating effect is good, the use comfort level is high, the heat conversion efficiency is improved, and the energy conservation and the environmental protection are realized. And the three heating modes can be flexibly switched according to the needs, so that the applicability is strong.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (5)
1. A floor heating system, comprising:
the air supply assembly comprises an air supply pipeline paved along the first indoor wall; an insulation layer is formed around the air supply pipeline;
the hollow metal floor assembly comprises an air inlet end and an air return end, and the air inlet end is connected with the air supply pipeline; the air return end is connected with an air return pipeline formed on the indoor second wall body;
The skirting line assembly comprises an air supply skirting line and an air return skirting line, the air supply skirting line is connected with the first wall and communicated with the air supply pipeline, and the air return skirting line is connected with the second wall and communicated with the air return pipeline; the air supply skirting line and the return air skirting line are respectively connected with movable shutters capable of being opened and closed in a rotating mode;
The top parts of the air supply skirting line and the air return skirting line are respectively and fixedly connected with the fixing pieces connected with the first wall body and the second wall body in a clamping way, and the bottom parts of the air supply skirting line and the air return skirting line are respectively connected with the first wall body and the second wall body through screws;
The movable shutter contained in the air supply skirting line can be switched among three position states, wherein the three position states comprise a first position state, a second position state and a third position state, and the first position state is used for closing a vent of the air supply skirting line so that all hot air enters the hollow metal floor assembly and is discharged by the air return skirting line; the second position state is used for partially opening the ventilation opening of the air supply skirting line, so that part of hot air enters the hollow metal floor assembly and is discharged by the air return skirting line, and the other part of hot air is discharged by the ventilation opening of the air supply skirting line; the third position state is used for blocking the air supply pipeline to enable all hot air to be discharged through the ventilation openings of the air supply skirting line; when the movable shutter contained in the air supply skirting line is in a first position state and a second position state, the movable shutter contained in the air return skirting line is in an open state, and when the movable shutter contained in the air supply skirting line is in a third position state, the movable shutter contained in the air return skirting line is in a closed state;
The hollow metal floor assembly comprises a heat dissipation floor assembly, and the heat dissipation floor assembly is respectively connected with the air supply pipeline and the return air pipeline.
2. The seed floor heating system of claim 1, wherein a surface of the insulation layer located away from the first wall and a surface of the second wall are each formed with a panel layer.
3. The seed floor heating system of claim 1, wherein the fixing member is connected to the wall body by a screw.
4. The seed floor heating system of claim 1, wherein the heat sink floor assembly comprises a heat sink floor plug and a heat sink floor socket, the heat sink floor plug being connected to the air supply socket at the bottom of the air supply duct, the heat sink floor socket being connected to the return air plug at the bottom of the return air duct.
5. The seed floor heating system of claim 1, wherein the air supply assembly comprises an air conditioning fan, an air outlet of the air conditioning fan being connected to an air supply duct by a hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238814.0A CN112797611B (en) | 2020-11-09 | 2020-11-09 | Ground heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238814.0A CN112797611B (en) | 2020-11-09 | 2020-11-09 | Ground heating system |
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| Publication Number | Publication Date |
|---|---|
| CN112797611A CN112797611A (en) | 2021-05-14 |
| CN112797611B true CN112797611B (en) | 2024-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011238814.0A Active CN112797611B (en) | 2020-11-09 | 2020-11-09 | Ground heating system |
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| Country | Link |
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| CN (1) | CN112797611B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183905B (en) * | 2021-12-20 | 2023-05-02 | 珠海格力电器股份有限公司 | House air conditioner air supply system, control method thereof and house structure |
| CN115046252B (en) * | 2022-07-11 | 2023-07-25 | 珠海格力电器股份有限公司 | Multidimensional implicit air-out air conditioner |
| CN115899919B (en) * | 2022-11-04 | 2024-10-01 | 苏州美瑞德建筑装饰有限公司 | Assembly type ultrahigh steel structure space sinking type air supply design structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112797611A (en) | 2021-05-14 |
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Address after: Room 185-190, 1st Floor, Building 5, No. 199 Shuanglong Street, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Greentown Construction Technology Group Co.,Ltd. Address before: Room 185-190, 1st floor, building 5, 199 Shuanglong street, Xihu District, Hangzhou, Zhejiang 310000 Applicant before: GREENTOWN DECORATION ENGINEERING GROUP Co.,Ltd. |
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