CN209181043U - The Novel heating system that solar thermal collector is combined with electric heating equipment - Google Patents
The Novel heating system that solar thermal collector is combined with electric heating equipment Download PDFInfo
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- CN209181043U CN209181043U CN201821945335.0U CN201821945335U CN209181043U CN 209181043 U CN209181043 U CN 209181043U CN 201821945335 U CN201821945335 U CN 201821945335U CN 209181043 U CN209181043 U CN 209181043U
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- solar thermal
- water
- thermal collector
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- electric heating
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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]
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model discloses the Novel heating systems that a kind of solar thermal collector is combined with electric heating equipment, including heat collection water tank, water inlet line is connected on the heat collection water tank, water pipeline is connected on the water inlet line, the lower part of the heat collection water tank is connected to the water inlet end of solar thermal collector by solar thermal collector water inlet pipe, and the water outlet of the solar thermal collector is connected to the top of heat collection water tank by solar thermal collector outlet pipe；The solar thermal collector includes at least one header.The utility model can eliminate accessory interlayer stomata and sand holes phenomenon, prevent the generation of ontology leakage scenarios；It assembles and is easy between all parts, maintenance is convenient；And noise reduction is small, meets national noise-reduction requirement；Industrial building roof and other positions that are fixedly mounted is adapted for mount on to install；Link pipeline and other accessories facilitate installation, convenient for installation and maintenance；Pipeline installation is beautiful and generous；Antiseptic property is strong, and heat insulation effect is good.
Description
Technical field
The utility model relates to a kind of heating systems, specifically, are related to a kind of solar thermal collector and electric heating equipment
The Novel heating system combined belongs to heating equipment technical field.
Background technique
With the continuous upgrading of the environmental problems such as haze, about coal-burning stove for heating the problem of is increasingly prominent, and consumption of coal is recognized
To be that haze pollutes most important source, cleaning heating increasingly becomes the inevitable choice of China's energy development transition.
For solar energy as a kind of new energy, it has three big features compared with conventional energy resource:
First: it is the utilizable the most abundant energy of the mankind.
Second: anywhere having solar energy on the earth.
Third: solar energy is a kind of energy of cleaning.
It is being selected by more and more users using solar heating.
Currently, existing heating generally selects coal to heat, air is polluted, leakage problems also easily occurs between pipe fitting, is protected
The problems such as temp effect is general is emerged one after another.
In summary, the existing technology has inconveniences and defects in actual use, so it is necessary to be improved.
Utility model content
The technical problems to be solved in the utility model is against the above deficiency, to provide a kind of solar thermal collector and electric heating
The Novel heating system that equipment combines can eliminate accessory interlayer stomata and sand holes phenomenon, prevent the generation of ontology leakage scenarios；
It assembles and is easy between all parts, maintenance is convenient；And noise reduction is small, meets national noise-reduction requirement；It is adapted for mount on
Industrial building roof and other positions that are fixedly mounted are installed；Link pipeline and other accessories facilitate installation, installation maintenance side
Just；Pipeline installation is beautiful and generous；Antiseptic property is strong, and heat insulation effect is good.
In order to solve the above technical problems, the utility model uses following technical scheme: solar thermal collector is set with electric heating
The standby Novel heating system combined, including heat collection water tank, connect water inlet line on the heat collection water tank, on the water inlet line
Water pipeline is connected, the lower part of the heat collection water tank is connected to the water inlet of solar thermal collector by solar thermal collector water inlet pipe
End, the water outlet of the solar thermal collector is connected to the top of heat collection water tank by solar thermal collector outlet pipe；
The solar thermal collector includes at least one header, and the header is rectangular parallelepiped structure, the header
The opposite face of two of them be square.Header water inlet is provided on one square face, header water inlet is used
In connection solar thermal collector water inlet pipe；Header water outlet is provided on the face of another square, header water outlet is used
In connection solar thermal collector outlet pipe, header water inlet is connected with header water outlet to be made to form water channel in header；
The opposite face of the wherein another two of the header is rectangle, and two opposite faces are multiple to be provided on rectangular face
Nozzle；Two opposite faces are that the nozzle on rectangular face is symmetrical arranged；The nozzle is connected to the water channel inside header,
Glass tube with vacuum is sealedly connected on the nozzle, the tail portion of the glass tube with vacuum is fixed by base plate；The header
It is obliquely installed with glass tube with vacuum, the side where header water inlet is lower than the side where header water outlet；
The lower part of the heat collection water tank also passes through pipeline and is connected with electric heating equipment and interior radiator in parallel；The electricity
Heating equipment and interior radiator are connected to the top of heat collection water tank by pipeline.
A kind of prioritization scheme is provided with water-temperature water-level sensor T2 in heat collection water tank；The solar thermal collector water inlet pipe
Upper one end close to header water inlet is provided with water temperature sensor T3；Close to header on the solar thermal collector outlet pipe
One end of water outlet is provided with water temperature sensor T1；Pipe between in parallel electric heating equipment, interior radiator and heat collection water tank
Water temperature sensor T4 is provided on road, the water temperature sensor T1, water-temperature water-level sensor T2, water temperature sensor T3, water temperature pass
Sensor T4 is electrically connected on control cabinet.
Further, the water inlet line, water pipeline, solar thermal collector water inlet pipe, solar thermal collector outlet pipe,
The top of pipeline, heat collection water tank between the lower part of heat collection water tank and electric heating equipment in parallel, interior radiator with it is in parallel
Pipeline between electric heating equipment, interior radiator selects hot galvanized steel pipe.
Further, on the solar thermal collector water inlet pipe close to heat collection water tank one end be provided with the first blass stop valve,
First check-valve, the first collection hot recycle pump, the second blass stop valve.
Further, it is successively set on the pipeline between the heat collection water tank and electric heating equipment in parallel, interior radiator
It is equipped with third blass stop valve, second check-valve, the second collection hot recycle pump, the 4th blass stop valve.
Further, the 5th is provided on the pipeline between electric heating equipment in parallel, interior radiator and heat collection water tank
Blass stop valve.
Further, the bottom of the header is provided with fixed-wing.
Further, the 6th blass stop valve is provided on water pipeline.
Further, header water inlet and header water outlet are the outer silk mouth of a river.
The utility model after the above technical solution is adopted, compared with prior art, has the advantage that
The utility model can eliminate accessory interlayer stomata and sand holes phenomenon, prevent the generation of ontology leakage scenarios；Each portion
It assembles and is easy between part, maintenance is convenient；And noise reduction is small, meets national noise-reduction requirement；Pressure-resistant, resistance to mechanical impact,
Heat shock resistance etc. meets national standard；Industrial building roof and other positions that are fixedly mounted is adapted for mount on to install；Heat collector connects
Mouth design specification, links pipeline and other accessories are convenient, convenient for installation and maintenance；Heat collector model multiplicity, can meet any space
Installation, client select diversification.Circuit design specification, selection economical rationality are installed beautiful and generous；Fitting designs specification, market
Purchase is convenient, strong operability；Heat collection water tank is patent engineering water tank, and antiseptic property is strong, and water nozzle design specification is reasonable, chain adapter tube
Road is convenient；Insulating layer is enclosed on the outside of heat collection water tank, insulating layer is polyurethane foam one-pass molding, uniform in foaming, heat preservation effect
Fruit is good.
The utility model is described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model heating system；
Fig. 2 is header side view；
Fig. 3 is the main view of header；
Fig. 4 is solar thermal collector cross-sectional view；
In figure,
The first blass stop valve of 1-, 2- first check-valve, 3- first collect hot recycle pump, the second blass stop valve of 4-, 5- control cabinet, 6- the
Two check-valves, 8- heat collection water tank, 9- header, 10- glass tube with vacuum, 11- solar thermal collector, 12- solar thermal collector into
Water pipe, 13- solar thermal collector outlet pipe, 14- electric heating equipment, 15- interior radiator, 16- third blass stop valve, 17- second
Collect hot recycle pump, the 4th blass stop valve of 18-, the 5th blass stop valve of 19-, the 6th blass stop valve of 20-, T1- water temperature sensor, T2- water temperature water
Level sensor, T3- water temperature sensor, T4- water temperature sensor.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now compareing Detailed description of the invention
Specific embodiment of the present utility model.
The Novel heating system that 1 solar thermal collector of embodiment is combined with electric heating equipment
As shown in Figs 1-4, what the utility model provided that a kind of solar thermal collector combines with electric heating equipment novel adopts
Heating system, including heat collection water tank 8 are provided with water-temperature water-level sensor T2 in heat collection water tank 8.
Water inlet line is connected on the heat collection water tank 8, and water pipeline is connected on the water inlet line, is arranged on water pipeline
There is the 6th blass stop valve 20.
The lower part of the heat collection water tank 8 is connected to the water inlet of solar thermal collector 11 by solar thermal collector water inlet pipe 12
End, the water outlet of the solar thermal collector 11 are connected to the top of heat collection water tank 8 by solar thermal collector outlet pipe 13.
The solar thermal collector includes at least one header 9, and the header 9 is rectangular parallelepiped structure, the collection
The face that the two of them of case 9 are opposite is square.Header water inlet, header water inlet are provided on one square face
For connecting solar thermal collector water inlet pipe 12；Header water outlet, header water outlet are provided on the face of another square
Mouth is for connecting solar thermal collector outlet pipe 13.Header water inlet is connected with header water outlet makes shape in header 9
At water channel.Header water inlet and header water outlet are the outer silk mouth of a river.
One end on the solar thermal collector water inlet pipe 12 close to header water inlet is provided with water temperature sensor T3.
One end on the solar thermal collector water inlet pipe 12 close to heat collection water tank 8 is provided with the first blass stop valve 1, first stops
It returns valve 2, first and collects hot recycle pump 3, the second blass stop valve 4.First blass stop valve 1, first check-valve 2, first collect hot recycle pump 3, the
Two blass stop valves 4 far from heat collection water tank 8 to the direction close to heat collection water tank 8 successively by being arranged.
One end on the solar thermal collector outlet pipe 13 close to header water outlet is provided with water temperature sensor T1.
The opposite face of the wherein another two of the header 9 is rectangle, and two opposite faces are equal on rectangular face
It is provided with multiple nozzles.Two opposite faces are that the nozzle on rectangular face is symmetrical arranged.Between adjacent 2 central point of nozzle
Distance is 90mm.2 diameter of nozzle is 68mm.
The nozzle is connected to the water channel inside header 9.Glass tube with vacuum 10 is sealedly connected on the nozzle, it is described
The tail portion of glass tube with vacuum 10 is fixed by base plate.
The header 9 is obliquely installed with glass tube with vacuum 10.Side where header water inlet goes out lower than header
Side where the mouth of a river.
The bottom of the header 9 is provided with fixed-wing, and the fixed-wing can increase the contact surface of header 9 Yu stationary plane
Product keeps header 9 more firm.
The lower part of the heat collection water tank 8 also passes through pipeline and is connected with electric heating equipment 14 and interior radiator 15 in parallel.
The electric heating equipment 14 and interior radiator 15 are connected to the top of heat collection water tank 8 by pipeline.
It is disposed on pipeline between the heat collection water tank 8 and electric heating equipment 14 in parallel, interior radiator 15
Third blass stop valve 16, second check-valve 6, second collect hot recycle pump 17, the 4th blass stop valve 18.
Water temperature sensing is provided on pipeline between in parallel electric heating equipment 14, interior radiator 15 and heat collection water tank 8
Device T4 and the 5th blass stop valve 19.
The water temperature sensor T1, water-temperature water-level sensor T2, water temperature sensor T3, water temperature sensor T4 are electrically connected with
On control cabinet 5.
The water inlet line, water pipeline, solar thermal collector water inlet pipe 12, solar thermal collector outlet pipe 13, thermal-arrest
The top of pipeline, heat collection water tank 8 between the lower part of water tank 8 and electric heating equipment 14 in parallel, interior radiator 15 with it is in parallel
Electric heating equipment 14, the pipeline between interior radiator 15 select hot galvanized steel pipe, with lower temperature resistance, at -40 DEG C
Under the conditions of, physical property does not change, and cross-ventilation is small, therefore the coefficient of heat conduction is small (0.03Kcal/m2h DEG C)；Flame retardancy；Construction party
Just: abscess is fine, and ontology is soft, can arbitrarily shear, be bonded, work progress is non-hazardous to human body and environment.
Electric heating equipment selects electric heating furnace.
Operation logic
Solar heating system draws the heat of the sun, the medium in heating pipe, after heating by solar thermal collector
Medium by Pipeline transport to heat-storing device, will be in heat-storing device using water circulating pump using indoor original heating equipment
Heating agent is transported to indoor heating equipment, and coil pipe radiations heat energy improves room temperature.When solar absorption heat is not able to satisfy heating
When demand heat, electric heating furnace starting provides institute's calorific requirement.
The utility model is tested by taking two headers 9 as an example.
The calorific value of 1KWH is 3600KJ, and the transformation efficiency of electric boiler is 0.93--0.98, and taking its efficiency herein is 0.96.
Obtaining 65000KJ heat needs power consumption 18.8KWH.
The demonstration solar energy -- electric heating furnace heating system can save 18.8KWH, a Heating Season in Heating Season daily
It is interior to save 2256KWH.
With compared with capacity coal-fired power plant, coal coal consumption 370g/kwh, meter are marked with power generation.Standard coal per ton can produce dioxy
Change 2.62 tons of carbon, sulfur dioxide 8.5Kg, nitrogen oxides 7.4Kg.Coal 6.956KG can be saved daily in the system Heating Season, subtracted
Carbon dioxide 18.225KG, sulfur dioxide 0.059KG, nitrogen oxides 0.051KG are discharged less；One Heating Season can save standard coal
834.7KG reduces discharge carbon dioxide 2187KG, sulfur dioxide 7.08KG, nitrogen oxides 6.12KG.
One tree can absorb 18.5KG carbon dioxide every year, and tree planting 118 is equivalent in a Heating Season.
The utility model can eliminate accessory interlayer stomata and sand holes phenomenon, prevent the generation of ontology leakage scenarios；Each portion
It assembles and is easy between part, maintenance is convenient；And noise reduction is small, meets national noise-reduction requirement；Pressure-resistant, resistance to mechanical impact,
Heat shock resistance etc. meets national standard；Industrial building roof and other positions that are fixedly mounted is adapted for mount on to install；Heat collector connects
Mouth design specification, links pipeline and other accessories are convenient, convenient for installation and maintenance；Heat collector model multiplicity, can meet any space
Installation, client select diversification.Circuit design specification, selection economical rationality are installed beautiful and generous；Fitting designs specification, market
Purchase is convenient, strong operability；Heat collection water tank is patent engineering water tank, and antiseptic property is strong, and water nozzle design specification is reasonable, chain adapter tube
Road is convenient；Insulating layer is enclosed on the outside of heat collection water tank, insulating layer is polyurethane foam one-pass molding, uniform in foaming, heat preservation effect
Fruit is good.
The above is the citing of the utility model preferred forms, wherein the part that do not address in detail is this field
The common knowledge of those of ordinary skill.The protection scope of the utility model is based on the contents of the claims, any to be based on this reality
The equivalent transformation carried out with novel technical inspiration, is also within the protection scope of the utility model.
Claims (9)
1. the Novel heating system that solar thermal collector is combined with electric heating equipment, it is characterised in that: including heat collection water tank
(8), water inlet line is connected on the heat collection water tank (8), water pipeline, the heat collection water tank (8) is connected on the water inlet line
Lower part by solar thermal collector water inlet pipe (12) connection solar thermal collector (11) water inlet end, the solar thermal collector
(11) water outlet is connected to the top of heat collection water tank (8) by solar thermal collector outlet pipe (13)；
The solar thermal collector includes at least one header (9), and the header (9) is rectangular parallelepiped structure, the collection
The face that the two of them of case (9) are opposite is square；
Header water inlet is provided on one square face, header water inlet is for connecting solar thermal collector water inlet pipe
(12)；Header water outlet is provided on the face of another square, header water outlet goes out for connecting solar thermal collector
Water pipe (13), header water inlet and header water outlet, which are connected, to be made to form water channel in header (9)；The header (9)
The opposite face of wherein another two be rectangle, two opposite faces are to be provided with multiple nozzles on rectangular face；Two
Opposite face is that the nozzle on rectangular face is symmetrical arranged；The nozzle water channel internal with header (9) is connected to, the pipe
It is sealedly connected with glass tube with vacuum (10) on mouthful, the tail portion of the glass tube with vacuum (10) is fixed by base plate；The collection
Case (9) is obliquely installed with glass tube with vacuum (10), and the side where header water inlet is lower than one where header water outlet
Side；
The lower part of the heat collection water tank (8) also passes through pipeline and is connected with electric heating equipment (14) and interior radiator in parallel
(15)；The electric heating equipment (14) and interior radiator (15) are connected to the top of heat collection water tank (8) by pipeline.
2. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: water-temperature water-level sensor T2 is provided in heat collection water tank (8)；Close to header on the solar thermal collector water inlet pipe (12)
One end of water inlet is provided with water temperature sensor T3；Close to header water outlet on the solar thermal collector outlet pipe (13)
One end is provided with water temperature sensor T1；Between in parallel electric heating equipment (14), interior radiator (15) and heat collection water tank (8)
Water temperature sensor T4, the water temperature sensor T1, water-temperature water-level sensor T2, water temperature sensor T3, water temperature are provided on pipeline
Sensor T4 is electrically connected on control cabinet (5).
3. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: the water inlet line, water pipeline, solar thermal collector water inlet pipe (12), solar thermal collector outlet pipe (13), collection hot water
The top of pipeline, heat collection water tank (8) between the lower part of case (8) and electric heating equipment (14) in parallel, interior radiator (15)
Pipeline between electric heating equipment (14) in parallel, interior radiator (15) selects hot galvanized steel pipe.
4. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: one end on the solar thermal collector water inlet pipe (12) close to heat collection water tank (8) is provided with the first blass stop valve (1), first
Check-valves (2), the first collection hot recycle pump (3), the second blass stop valve (4).
5. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: it is disposed on the pipeline between the heat collection water tank (8) and electric heating equipment (14) in parallel, interior radiator (15)
Third blass stop valve (16), second check-valve (6), the second collection hot recycle pump (17), the 4th blass stop valve (18).
6. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: the 5th bronze medal lock is provided on the pipeline between electric heating equipment (14) in parallel, interior radiator (15) and heat collection water tank (8)
Valve (19).
7. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: the bottom of the header (9) is provided with fixed-wing.
8. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: the 6th blass stop valve (20) is provided on water pipeline.
9. the Novel heating system that solar thermal collector as described in claim 1 is combined with electric heating equipment, feature exist
In: header water inlet and header water outlet be the outer silk mouth of a river.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821945335.0U CN209181043U (en) | 2018-11-24 | 2018-11-24 | The Novel heating system that solar thermal collector is combined with electric heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821945335.0U CN209181043U (en) | 2018-11-24 | 2018-11-24 | The Novel heating system that solar thermal collector is combined with electric heating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209181043U true CN209181043U (en) | 2019-07-30 |
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ID=67374145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821945335.0U Expired - Fee Related CN209181043U (en) | 2018-11-24 | 2018-11-24 | The Novel heating system that solar thermal collector is combined with electric heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209181043U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926038A (en) * | 2019-10-28 | 2020-03-27 | 哈尔滨普华电力设计有限公司 | Butt joint structure convenient for connection of electric heating equipment and solar equipment |
-
2018
- 2018-11-24 CN CN201821945335.0U patent/CN209181043U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926038A (en) * | 2019-10-28 | 2020-03-27 | 哈尔滨普华电力设计有限公司 | Butt joint structure convenient for connection of electric heating equipment and solar equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee |