CN214996577U - Four-pipe heating activation building enclosure structure - Google Patents
Four-pipe heating activation building enclosure structure Download PDFInfo
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- CN214996577U CN214996577U CN202120253872.4U CN202120253872U CN214996577U CN 214996577 U CN214996577 U CN 214996577U CN 202120253872 U CN202120253872 U CN 202120253872U CN 214996577 U CN214996577 U CN 214996577U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 11
- 230000004913 activation Effects 0.000 title description 24
- 238000005553 drilling Methods 0.000 claims abstract description 111
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims abstract description 6
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 description 26
- 239000007924 injection Substances 0.000 description 26
- 238000001994 activation Methods 0.000 description 23
- 238000009825 accumulation Methods 0.000 description 15
- 238000005338 heat storage Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000001052 transient effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000007725 thermal activation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The utility model discloses a four-pipe heating activated building envelope structure, which comprises a wall body base body, a plurality of double-U-shaped heat exchange pipelines and a temperature monitoring system, wherein a plurality of drilling groups are arranged in the wall body base body, each drilling group consists of four special-shaped drilling holes which are symmetrically arranged in a cross shape, each special-shaped drilling hole consists of a first circular drilling hole, a second circular drilling hole and a rectangular drilling hole, each double-U-shaped heat exchange pipeline consists of a first U-shaped pipe, a second U-shaped pipe and a heat exchange working medium positioned in the first U-shaped pipe and the second U-shaped pipe, the first U-shaped pipe is arranged in a second round drill hole in the vertical direction in the drill hole group, the second U-shaped pipe is arranged in a second round drill hole in the horizontal direction in the drill hole group, a U-pipe fixing rubber strip is arranged in the rectangular drill hole, a special fixing piece is arranged in the first round drill hole, and the special fixing piece is attached to the U-pipe fixing rubber strip tightly to enable the first U-shaped pipe and the second U-shaped pipe to be attached to the wall body base body tightly. The utility model discloses can realize higher natural energy utilization and effectively reduce the corresponding initial investment of source end and pumping system and working costs.
Description
Technical Field
The utility model belongs to the technical field of the energy-conserving technique of building and specifically relates to a four-pipe heats activation building envelope.
Background
The thermally activated building system is a high-efficiency building energy-saving and energy-supplying system, however, the technology still has some problems to be solved urgently due to the limitations of the existing construction forms and construction modes. Firstly, in the operation process of a heat activated building system, due to the mismatch between the heat injection capacity of the system and the heat diffusion capacity of the building envelope, the peripheral area of the embedded pipe has a serious heat accumulation phenomenon. The heat accumulation phenomenon is continuously intensified along with the continuous operation of a heat-activated building system, the temperature difference between the heat injection temperature and the peripheral area of the embedded pipe is rapidly reduced, and the heat injection capacity and the operation efficiency of the system are finally greatly reduced. Secondly, because the accumulated heat cannot be transferred to the surrounding area, especially the inner surface of the wall body in time, the response speed of the thermal activation building system in the process of treating the transient load in the building room is poor, and therefore, part of the buildings using the thermal activation building system still need to be provided with an additional transient load treatment system. In addition, the existence of the hot accumulation phenomenon can cause the building envelope to face the potential safety hazard of uneven heating for a long time, and the building envelope is easy to crack so as to influence the overall structural safety and use experience of the building. However, effective technical measures and methods for solving the heat accumulation phenomenon in the heat-activated building envelope are not available at present, and the main countermeasures are to intermittently operate the heat-activated building system and to relieve the adverse effects caused by the heat accumulation phenomenon by means of pulse heat injection. Intermittent operation, while proven effective in increasing heat injection and reducing system operating power consumption for thermally activated building systems, is not always suitable for all thermally activated building systems. For those heat activated building systems using natural energy as a source of cold and heat, the inability to continue operation in a time period when natural energy is abundant to wait for the heat accumulation to be relieved will result in a great waste of natural energy. Meanwhile, in order to inject enough natural energy when the thermal accumulation phenomenon is recovered, the pumping system power and the source end capacity have to be additionally increased, so that the cost for coping with the thermal accumulation phenomenon is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical defect who exists among the prior art, and provide a four-pipe heating activation building envelope, can effectively alleviate the production and the influence of hot pile up phenomenon in the heat activation building envelope, improve the response speed that heat activation building envelope corresponds transient load, improve the uneven problem of being heated of heat activation building envelope, finally reach the purpose of strengthening heat activation building system heat injection ability and operating efficiency.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
a four-pipe heating activation building envelope structure comprises a wall body base body, a plurality of double-U-shaped heat exchange pipelines and a temperature monitoring system, wherein a plurality of drilling hole groups are arranged in the wall body base body, each drilling hole group consists of four special-shaped drilling holes which are symmetrically arranged in a cross shape, each special-shaped drilling hole consists of a first circular drilling hole, a second circular drilling hole and a rectangular drilling hole, the first circular drilling hole is close to the center of the wall body base body, the second circular drilling holes are distributed on the outer side of the first circular drilling hole and communicated with the first circular drilling hole through the rectangular drilling holes, the diameter of the first circular drilling hole is larger than that of the second circular drilling hole, the width of the rectangular drilling hole is the same as that of the second circular drilling hole, each double-U-shaped heat exchange pipeline consists of a first U-shaped pipe, a second U-shaped pipe and a heat exchange working medium positioned in the first U-shaped pipe and the second U-shaped pipe, and the heat exchange working medium positioned in the first U-shaped pipe are positioned in the second circular drilling hole groups in the vertical direction, the second U-shaped pipe is arranged in a second round drilling hole in the horizontal direction in the drilling hole group, a U-pipe fixing adhesive tape is arranged in the rectangular drilling hole, a special fixing piece is arranged in the first round drilling hole, and the special fixing piece is tightly attached to the U-pipe fixing adhesive tape to enable the first U-shaped pipe and the second U-shaped pipe to be tightly attached to the wall body base body; the temperature monitoring system is by being located inside first temperature sensor, the second temperature sensor of wall body base member and external controller constitute, the second temperature sensor is located the horizontal drilling extension line of special-shaped drilling crowd to the distance of second temperature sensor and horizontal drilling tip and wall body base member internal surface equals, first temperature sensor is located the vertical drilling extension line of special-shaped drilling crowd, and the distance of first temperature sensor apart from vertical drilling tip is unanimous with the distance of second temperature sensor and horizontal drilling tip.
Preferably, one end of the wall body base body is provided with a cylindrical reserved cavity and forms a first operation bin by enclosing with the first operation bin cover, and the other end is provided with a second operation bin cover and forms a second operation bin by enclosing.
Preferably, the first U-shaped pipe and the second U-shaped pipe in the double U-shaped heat exchange pipeline are respectively connected in series or in parallel in the second operation bin, and further communicated with the cold and heat source and the pumping system through fluid pipeline inlets and outlets arranged at the upper end and the lower end of the second operation bin.
Preferably, an outer heat-insulating layer and an outer plastering layer are sequentially arranged on the outer sides of the wall body base body, the first operation cabin and the second operation cabin.
Compared with the prior art, the beneficial effects of the utility model are that: 1. the utility model discloses heat activation building envelope need not to carry out intermittent type control to heat activation building system and can effectively solve the heat that traditional heat activation building envelope is inside to be extensively existed and pile up the phenomenon, consequently can realize higher natural energy utilization and rate and effectively reduce the corresponding initial investment of source end and pumping system and working costs. 2. Heat, heat accumulation and heat release in turn through wall body base member central zone and both sides edge area, the utility model discloses a heat activation building envelope can also be when overcoming the influence of heat accumulation phenomenon, ensures that heat activation building system's heat injection ability can not take place to attenuate by a wide margin, therefore heat injection ability and operating efficiency compare traditional heat activation building system and obtain showing the promotion. 3. Through the alternate heat injection, heat storage and heat release of the central area and the edge areas at the two sides of the wall body substrate, the problem of uneven heating of the heat-activated building envelope structure can be effectively solved, the potential risk of cracks in the heat-activated building envelope structure is reduced, and the structure safety and the use experience are correspondingly improved. 4. Under the directional heat injection, heat accumulation and exothermic mode of carrying out wall body base member both sides edge zone, the utility model discloses a heat activation building envelope can also in time respond to the transient load of building, and response speed compares traditional heat activation building envelope rapider, therefore can effectively reduce system installation capacity, initial investment and the working costs that is used for handling the instantaneous load of building. 5. Under the heat injection, heat accumulation and exothermic mode are reinforceed in the whole region of carrying out wall body base member central zone and both sides edge area, the utility model discloses a heat activation building envelope can pour into the heat with the heat injection ability that is higher than traditional heat activation building system into envelope, consequently the performance is more superior when the area that the weather is abominable or use in equal climatic zone. 6. The utility model discloses a heat activation building envelope has realized the modularized design and the construction of heat activation building system, need not to carry out extensive destruction to the wall body bearing layer after establishing and can accomplish maintenance and fortune dimension, overhauls the degree of difficulty and fortune dimension work load and can obtain descending by a wide margin.
Drawings
Fig. 1 is a schematic view of a four-pipe heating activated building envelope of the present invention;
fig. 2 is a top view of a four-pipe heat activated building envelope of the present invention;
FIG. 3 is a cross-sectional view along AA of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3;
FIG. 5 is a cross-sectional view taken along line BB of FIG. 2;
fig. 6 is a partially enlarged view of fig. 5.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model discloses a four pipe heats activation building envelope's schematic diagrams is shown in fig. 1-5, including wall body base member 11, a plurality of two U type heat transfer pipeline, temperature monitoring system and outer heat preservation and inside and outside plastering layer. One end of the wall body base body 11 is provided with a cylindrical reserved cavity and is enclosed with the first operation bin cover 13 to form a first operation bin 12, and the other end of the wall body base body is provided with a second operation bin cover 15 and is enclosed to form a second operation bin 14. A plurality of drilling groups 19 consisting of four symmetrically arranged special-shaped drilling holes are arranged between the first operating cabin 12 and the second operating cabin 14. The drilling group is composed of four special-shaped drilling holes which are symmetrically arranged in a cross shape, each special-shaped drilling hole is composed of a first circular drilling hole, a second circular drilling hole and a rectangular drilling hole, the first circular drilling hole is close to the center of the wall body base body, the second circular drilling holes are distributed on the outer side of the first circular drilling hole and communicated with the rectangular drilling holes through the rectangular drilling holes, the diameter of the first circular drilling hole is larger than that of the second circular drilling hole, and the width of each rectangular drilling hole is the same as that of the second circular drilling hole. And an outer heat-insulating layer 18 and an outer plastering layer 17 are sequentially arranged on the outer sides of the wall body base body 11, the first operating bin 12 and the second operating bin 14, and an inner plastering layer 16 is arranged on the corresponding inner side. Each heat exchange tube route consists of a first U-shaped tube 21, a second U-shaped tube 22 and a heat exchange working medium, wherein the first U-shaped tube 21 is arranged in a vertical drilling hole of the drilling group 19 through the first operation cabin 12, and the second U-shaped tube 22 is also arranged in a horizontal drilling hole of the drilling group 19 through the first operation cabin 12. The first U-shaped pipe 21 and the second U-shaped pipe 22 in the double U-shaped heat exchange pipeline are respectively connected in series or in parallel in the second operation cabin 14, and further communicated with a cold and heat source and a pumping system through fluid pipeline inlets and outlets 25 arranged at the upper end and the lower end of the second operation cabin 14. The first U-shaped pipe 21 and the second U-shaped pipe 22 placed in the special-shaped drilled holes are fixed at the positions of the small-diameter circular drilled holes in the special-shaped drilled holes through special fixing pieces 24 with the diameter equal to that of the large-diameter circular drilled holes and provided with mounting holes and U-shaped pipe fixing rubber strips 23, and are kept in close contact with the wall body 11. When the device is installed, the U-shaped pipeline and the U-shaped pipe fixing adhesive tape are placed in the first drilling hole, and the U-shaped pipeline and the U-shaped pipe fixing adhesive tape are pressed into the second drilling hole and the rectangular drilling hole on one side of the first operation cabin; then, the special fixing piece is placed into the first drilling hole through the first operation cabin, a long screw with threads is additionally connected with the mounting hole of the special fixing piece, and the special fixing piece is pushed to the side of the second operation cabin along the first drilling hole by the aid of the long screw. In the pushing process, the U-shaped pipe is pushed into the second drilling hole and is in close contact with the peripheral surface of the second drilling hole under the extrusion action of the U-shaped pipe fixing rubber strip.
If only four drill holes with the same size as the diameter of the U pipe are arranged, although the close contact between the pipeline and the drill holes and good heat exchange effect can be ensured, the pipeline is very difficult to install, overhaul and replace in a narrow (small drill hole) with the same diameter as the U pipe; similarly, if only four drill holes with the size larger than the diameter of the U pipe are arranged, the installation, overhaul and replacement efficiency can be preferentially ensured, but the contact between the pipeline and the drill holes is undoubtedly poor, and a larger gap is undoubtedly reserved between the pipeline and the drill holes, so that the heat exchange effect of the fluid pipeline is greatly reduced.
The utility model is provided with a second round drilling hole (small drilling hole) and a U-shaped pipe fixing rubber strip so as to lead the fluid pipeline and the drilling hole to be in close contact and keep higher contact and heat exchange effects; the first round bore (large bore) is provided to allow for quick and easy installation, repair or replacement of the U-tube. The combination of the first circular bore (large bore) and the second circular bore (small bore) serves the purpose of technical effect 6.
In addition, the existence of the four first round drill holes (large drill holes) can also prevent heat in the fluid pipeline in the second round drill hole (small drill hole) from being transferred to one side of the four first round drill holes (large drill holes) (because the side is not only the air in the first round drill holes (large drill holes) but also the air in the intermittent special fixing piece, the transfer effect is poor), so that the mutual interference of heat transfer among the four drill holes can be avoided, and a certain effect of relieving the heat accumulation effect can be achieved.
The operation cabin is arranged to avoid the problem that the pipeline is directly exposed to outdoor air, so that the building appearance is influenced on one hand, and on the other hand, if the U pipe is not protected by the operation cabin, the U pipe is easy to damage and the like.
This device adopts the interval to set up several special mounting, rather than directly using a special mounting, and the purpose has two: one is for the purpose of material saving, because the U-shaped pipe fixing rubber strip and the rectangular drill hole have certain interference fit, the U-shaped pipe fixing rubber strip cannot deform or loosen under the ordinary condition after being extruded, and the U-shaped pipe fixing rubber strip and the rectangular drill hole can be extremely extruded; another object is that the plurality of fixing mounts are easier to mount and dismount than one integrated fixing mount.
The temperature monitoring system is composed of a first temperature sensor 3, a second temperature sensor 4 and an external controller 6 which are positioned inside the wall body base body 11. The second temperature sensor 4 is positioned on the extension line of the horizontal drilling holes of the special-shaped drilling hole group 12, and the distances between the second temperature sensor 4 and the end part of the horizontal drilling hole and the inner surface 5 of the wall body are equal. The first temperature sensor 3 is located on a vertical drilling extension line of the special-shaped drilling group 12, and the distance from the first temperature sensor 3 to the end part of the vertical drilling is consistent with the distance from the second temperature sensor 4 to the end part of the horizontal drilling.
The operation control method of the four-pipe heating activated building envelope structure comprises three modes, namely an intermittent heat injection mode, a heat storage and heat release mode, a directional heat injection mode, a heat storage and heat release mode and a reinforced heat injection mode, a heat storage mode and a heat release mode.
Intermittent heat injection, heat accumulation and heat release modes: after controller 6 received heat activation building system and carried out energy-conserving preferred operation instruction, the utility model discloses a heat activation building envelope lasts heat injection, heat accumulation and heat release according to the regional alternative mode of horizontal drilling behind the vertical drilling earlier. First, a control signal is sent to the thermally activated building system through the controller 6 to turn on the first U-shaped tubes 21, at which time the thermally activated building system performs intermittent heat injection, heat storage, and heat release modes of the vertical drilled area. In this mode, the thermally activated building system continuously injects heat into the central region of the wall substrate 11 through the first U-shaped pipe 21, while continuously monitoring the temperature change of the central region of the wall substrate 11 through the first temperature sensor 3. When the temperature difference between the real-time temperature monitoring value of the first temperature sensor 3 and the heat exchange working medium is smaller than a set value, the controller 6 sends a control signal to the heat activated building system again to switch the heat exchange pipeline and connect the second U-shaped pipe 22, and at the moment, the heat activated building system executes the intermittent heat injection, heat storage and heat release modes of the horizontal drilling area. In this mode, the thermally activated building system continuously injects heat into the two side edge regions of the wall body 11 through the second U-shaped heat exchange tubes 22, and simultaneously continuously monitors the temperature change of the two side edge regions through the second temperature sensor 4. When the temperature difference between the real-time temperature monitoring value of the second temperature sensor 4 and the heat exchange working medium is smaller than the set value, the controller 35 sends a control signal to the heat activated building system again to switch on the first U-shaped pipe 21 again, and the intermittent heat injection, heat storage and heat release modes of the vertical drilling area are executed again. Thus, the vertical drilling area and the horizontal drilling area alternately perform the processes of continuously injecting heat, accumulating heat and releasing heat until the controller 6 issues a system stop instruction.
Directional heat injection, heat storage and heat release modes: when the controller 6 receives the command for preferentially processing the indoor transient load during the operation of the above-described "intermittent heat injection, heat storage, and heat release mode", the controller 6 immediately gives a command to the thermally activated building system and performs the directional heat injection, heat storage, and heat release mode of the horizontal drilling area. In this mode, the thermally activated building system continuously injects heat into both side edge regions of the wall body 11 through the second U-shaped tubes 22 to preferentially cope with instantaneous load from the indoor.
Strengthening heat injection, heat storage and heat release modes: when the controller 6 receives an operation instruction of giving priority to the performance of the thermally activated building system, the controller 6 immediately gives a rapid heat injection instruction to the thermally activated building system and executes the enhanced heat injection, heat storage and heat release modes of the vertical drilling area and the horizontal drilling area. In this mode, the heat-activated building system continuously injects heat into the whole area including the central area and both side edge areas of the wall body 11 through the first U-shaped pipe 21 and the second U-shaped pipe 22 to ensure high thermal performance of the enclosure.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A four-pipe heating activated building envelope structure is characterized by comprising a wall body base body, a plurality of double-U-shaped heat exchange pipelines and a temperature monitoring system, wherein a plurality of drilling hole groups are arranged in the wall body base body, each drilling hole group is composed of four special-shaped drilling holes which are symmetrically distributed in a cross shape, each special-shaped drilling hole is composed of a first circular drilling hole, a second circular drilling hole and a rectangular drilling hole, the first circular drilling hole is close to the center of the wall body base body, the second circular drilling holes are distributed on the outer side of the first circular drilling hole and communicated with the first circular drilling holes through the rectangular drilling holes, the diameter of the first circular drilling hole is larger than that of the second circular drilling hole, the width of the rectangular drilling hole is the same as that of the second circular drilling hole, each double-U-shaped heat exchange pipeline is composed of a first U-shaped pipe, a second U-shaped pipe and a heat exchange working medium positioned in the first U-shaped pipe and the second U-shaped pipe, wherein the first U-shaped pipe is arranged in the second circular drilling hole in the vertical direction in the drilling hole groups, the second U-shaped pipe is arranged in a second round drilling hole in the horizontal direction in the drilling hole group, a U-pipe fixing adhesive tape is arranged in the rectangular drilling hole, a special fixing piece is arranged in the first round drilling hole, and the special fixing piece is tightly attached to the U-pipe fixing adhesive tape to enable the first U-shaped pipe and the second U-shaped pipe to be tightly attached to the wall body base body; the temperature monitoring system is by being located inside first temperature sensor, the second temperature sensor of wall body base member and external controller constitute, the second temperature sensor is located the horizontal drilling extension line of special-shaped drilling crowd to the distance of second temperature sensor and horizontal drilling tip and wall body base member internal surface equals, first temperature sensor is located the vertical drilling extension line of special-shaped drilling crowd, and the distance of first temperature sensor apart from vertical drilling tip is unanimous with the distance of second temperature sensor and horizontal drilling tip.
2. The four-pipe heat activated building envelope of claim 1, wherein the wall substrate has a cylindrical pre-cavity at one end and encloses with a first operating bin cover to form a first operating bin, and a second operating bin cover is mounted at the other end and encloses to form a second operating bin.
3. The four-pipe heating activated building envelope of claim 2, wherein the first U-pipe and the second U-pipe in the double U-shaped heat exchange pipeline are connected in series or in parallel in the second operation bin, and further communicated with the cold and heat source and the pumping system through fluid pipeline inlets and outlets arranged at the upper end and the lower end of the second operation bin.
4. The four-pipe heat activated building envelope of claim 3, wherein an outer insulating layer and an outer plastering layer are sequentially arranged on the outer sides of the wall body base body, the first operating cabin and the second operating cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120253872.4U CN214996577U (en) | 2021-01-29 | 2021-01-29 | Four-pipe heating activation building enclosure structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120253872.4U CN214996577U (en) | 2021-01-29 | 2021-01-29 | Four-pipe heating activation building enclosure structure |
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| Publication Number | Publication Date |
|---|---|
| CN214996577U true CN214996577U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120253872.4U Expired - Fee Related CN214996577U (en) | 2021-01-29 | 2021-01-29 | Four-pipe heating activation building enclosure structure |
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| Country | Link |
|---|---|
| CN (1) | CN214996577U (en) |
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2021
- 2021-01-29 CN CN202120253872.4U patent/CN214996577U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |