CN104896634B - The compensation shallow layer geothermal energy of geothermal energy central air-conditioning is the same as well conversion equipment - Google Patents
The compensation shallow layer geothermal energy of geothermal energy central air-conditioning is the same as well conversion equipment Download PDFInfo
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- CN104896634B CN104896634B CN201510220172.4A CN201510220172A CN104896634B CN 104896634 B CN104896634 B CN 104896634B CN 201510220172 A CN201510220172 A CN 201510220172A CN 104896634 B CN104896634 B CN 104896634B
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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
- Y02B10/40—Geothermal heat-pumps
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Abstract
The invention discloses a kind of compensation shallow layer geothermal energy of geothermal energy central air-conditioning with well conversion equipment, including water supply well and well lid, interior well casing and outer well tube, outlet pipe, return pipe and immersible pump, wherein, outer well tube is sleeved on the inside of water supply well, interior well casing is set in outer well tube center, and at least two layers of taper is provided between interior well casing and outer well tube and isolates supporting layer；Outlet pipe carries immersible pump and is lifted on below the waterline in interior well casing, and multiple return pipes are drained between each taper isolation supporting layer in region respectively；Interior well casing is provided with collocation structure.The present invention can allow interior well casing and outer well tube length to be not completely equivalent, and reduce difficulty of construction, have wider allowed band to cutting error and welding error, improve operating efficiency.Overcome multiple isolation supporting layer docking imprecision problems and load inequality problem in the blind area of underground.
Description
Technical field
The invention belongs to ground（Heat）In energy field of central air-conditioning on shallow-layer（Heat）It can utilize with well conversion equipment, especially
It is related to a kind of ground（Heat）Energy central air-conditioning（Heat）It can utilize with well conversion equipment.
Background technology
Ground（Heat）Energy central air-conditioning, it is using temperature underground water constant all the year round as geothermal energy medium is transmitted, passes through heat pump machine
Group, water temperature is improved or reduced to reach refrigeration, heating purpose, the central air-conditioning of cold and heat source is provided for building.Due to its efficiency
Than high, than traditional other forms central air-conditioning energy 40~60%, energy conservation and consumption reduction effects significantly and progressively by government, office,
The favor of business unit, while reached the accreditation of most user.At present, have been carried out that water-source heat-pump central air conditioner is installed
Return water mode uses " more well recharges " mode.Drawn water from a bite water supply well, by the heat exchanger of heat pump main frame by water
Cold or heat discharge water after taking away, to two mouthfuls or more than two mouthfuls of water supply well recharge.This mode advantage is Energy Efficiency Ratio height, but
In the presence of discharge water can not in time whole recharges to underground the problem of.Firstly, since backwater be well head open type no pressure from
So trickling, not only back-flow velocity is slow, and easily causes backwater pollution.And the water of underground can not be returned in time, it can be overflow from well head
Go out or ground is directly discharged to by pipeline.Long-term discharge, the waste of water resource is not only resulted in, it is also possible to cause under level of ground water
Drop is even exhausted, and then has influence on the safety of surrounding building；Secondly, it is necessary to which the well number beaten is more, the land area that need to be taken
Greatly, in the less groups of building of floor space（Thing）In can not use.The disadvantages mentioned above of " more well recharges " mode so that water resource heat pump
The power savings advantages of central air-conditioning are cancelled, and are promoted in water-source heat-pump central air conditioner, implement process that is energy-saving, improving environment
In a bottleneck problem, and the behavior that national hydraulic department is strictly forbidden.
Due to its drawback, large area shows, and 100% whole recharges can not be accomplished extremely by being mainly manifested in the underground water taken
Underground, then earthward discharge, cause water supply well to silt up, water level decreasing.This mode is while " taking " underground water temperature, also
" use " underground water, the water resource for causing preciousness greatly waste, while make water-source heat-pump central air conditioner because anhydrous available
And whole system is caused to be paralysed.Therefore.What the shortcomings that " more well recharges " mode, promoted and developed as water-source heat-pump central air conditioner
Bottleneck.
In existing same well recharging technique, by the way of inner and outer pipes are installed respectively, such as Patent publication No is CN
In 103982956 A patent document, the same well recharging technique by interior well casing and outer well tube is disclosed, it is necessary first under into well
Enter outer well tube, in place after it is lower again in well casing.Outer well tube be internally provided with the contact surface that is cooperated between interior well casing outer wall and
Isolation structure, the length of only each contact-segment is identical could to keep sealingly coupled with each other, but because well depth is generally up to a hundred
Rice, outer well tube and interior well casing independently many sections are by being welded to form, and different well depth situation difference needs scenes are entered
Row cutting and weld job, inside and outside well casing go into the well respectively after because displacement, cutting error or welding error etc. factor influence, error
The contact sealing property that accumulation degree is big to be caused between interior well casing and outer well tube is bad, and actual is difficult to accomplish whole separation layers
All realize and be tightly connected.Because sealing docking operation occurs in underground, in blind area, can not servant safeguard and detection, more make
Support degree and sealing tightness are unpredictable, and this is same well recharge equipment important problem present in construction, and the program exists
Immersible pump in the future is time-consuming, takes a lot of work, and influences the use of air-conditioning for a long time.
In the A of Patent publication No CN 103982955 patent document, all have preferably to reach multiple isolation structures
Sealing, cartridge type suit sealing structure is employed, because the core structure has certain length, in the scope of underground blind area, because
Inner and outer pipes error in length or because displacement and welding error can allow in a big way.However, due to well depth rice generally up to a hundred, outer well
Pipe and interior well casing are independently welded to form, and the interior well casing in the structure is with outer well tube without load relation, up to a hundred meters of interior well casing
Quality is very big, and very big technical problem can be had by providing powerful support force by well lid merely, either installation or maintenance difficulty
All very big, wellhead sealing layer also easily reduces service life very much greatly because well lid is pressurized.The implementation of the program also needs to many spies
Different design could be up to standard, there is great difficulty in actual applications.
The content of the invention
The defects of present invention will not only overcome " more well recharges " completely, enables 100% whole recharges of backwater to underground, moreover it is possible to
Leaving water temperature is set to remain at suitable temperature；Using the compensation package assembly of inner tube product specification can be made unified simultaneously
Change and standardize, avoid inside and outside borehole axis that butt-joint operation can be made to be in outside well and carried out, it is ensured that sealed connection is grasped to problem of misalignment
The property made, improve sealing joint quality and efficiency of construction.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of water-source heat-pump central air conditioner water supply well connection
Formula is the same as well backflow device, including water supply well and well lid, interior well casing and outer well tube, outlet pipe, return pipe and immersible pump, the outer well
For pipe sleeve on the inside of water supply well, interior well casing is set in outer well tube center, and at least two layers cone is provided between interior well casing and outer well tube
Shape isolates supporting layer；Outer well tube, which is located on the tube wall between taper isolation supporting layer, sets permeable hole；Outlet pipe carries immersible pump
It is lifted on below the waterline in interior well casing, multiple return pipes are drained between each taper isolation supporting layer in region respectively；
The interior well casing is provided with collocation structure, and the collocation structure is to set sleeve pipe in the port of interior well casing one, at the end of interior well casing two
Block machine in mouth setting, interior block machine are located in sleeve pipe and are set with O-ring seal, and add block machine after sleeve port is fixed with.
After collocation structure, interior well casing and outer well tube length can be allowed to be not completely equivalent, reduce difficulty of construction, can be with
Allow have cutting error and welding error, reduce difficulty of processing, improve operating efficiency.In compared with great error range, inner tube
Can realize it is automatic stretch or truncate is repaid, overcome multiple isolation supporting layers docking imprecision problems and load in the blind area of underground unequal
Problem.In the case of with collocation structure, each interior well casing section is independent weight bearing structure, and each supporting layer of isolating only undertakes its upside
The gravity of one section of inner tube, without sharing the gravity of other each section of inner tube, so as to avoid being sealed caused by local support dynamics is excessive
Face premature aging problem, also avoid because of local support dynamics not enough seepy question.The program is in implementation process, it is possible to increase
Efficiency of construction several times, and ensure that same well backflow device has the most long life.Moreover, interior well casing is being gone out into well servicing or replacing
During, although interior well casing is oversize, cut without internal well casing main body, additional block machine need to be only cut with regard to that can be interior well
Pipe is changed into independent each internal diameter pipeline section, it is to be replaced after in the additional block machine of repair welding.
The taper isolation supporting layer is that outer well tube inwall relevant position is provided with rubber ring frustum, and outside interior well casing
Rubber cone piece is set on wall, and the upper side of rubber cone piece has additional metal backing, the rubber cone piece and rubber ring frustum
The conical surface can match suit and support；Taper isolation supporting layer is to set inside support ring, interior branch in outer well tube inwall relevant position
Fixed rubber ring frustum on the outside of pushing out ring.Rubber cone piece external diameter positioned at lower floor is not more than upper rubber ring frustum internal diameter.
, can by setting rubber ring frustum, and the rubber cone piece external diameter of lower floor to be not more than upper rubber ring frustum internal diameter
So that easily interior well casing is put into outer well tube, and easily interior well casing is taken out from outer well tube, for dress well and dimension
Shield is brought convenience, and is improved efficiency of construction and is reduced maintenance cost and difficulty.The present invention has tri-level construction structure, its outer well tube one
Secondary property forever uses after going into the well；The Rational structure of interior well casing and outer well tube ensures that interior well casing can be during several years even many decades
Carry out out well servicing；The immersible pump being lifted in interior well casing, can according to be actually needed at any time lifted decline or safeguarded.
Can be air heat-insulation layer between outlet pipe and interior well casing, or in the interlayer between outlet pipe and interior well casing
Irrigate heat-barrier material and form thermal insulation layer, to avoid recharge water from producing cold and hot exchange with water outlet.
Annular permeable layer is provided between the borehole wall and outer well tube of water supply well, the annular permeable layer oozes for integral annular
Water material, either annular permeable layer be provided with inside and outside supporting network and including, fill in outer support net sandwich seepage material or
Annular permeable layer is the gravel material being filled between support water-permeable pipe and soil horizon.
The beneficial effects of the invention are as follows：
1. design structure of the present invention is more reasonable, interior well casing and outer well tube length can be allowed to be not completely equivalent, reduce construction
Difficulty, there is wider allowed band to cutting error and welding error, improve operating efficiency.In compared with great error range,
Inner tube can realize it is automatic stretch or truncate is repaid, overcome in the blind area of underground multiple isolation supporting layers docking imprecision problems and load not
Average problem.Avoid error or displacement caused by axial disunity, it can be ensured that every section of docking is all in Best link state.
Avoid, because underlying well casing is improper, causing soil cave-in, causing water supply well to scrap.
2. each interior well casing section is independent weight bearing structure, each gravity isolated supporting layer and only undertake its one section of inner tube in upside, no
With the gravity for sharing other each section of inner tube, so as to avoid the sealing surface premature aging problem caused by local support dynamics is excessive,
Avoid because of local support dynamics not enough seepy question.Efficiency of construction several times can be improved, it is ensured that have with well backflow device most long
Service life.Moreover, go out by interior well casing in well servicing or Renewal process, although interior well casing is oversize, without internal well casing master
Body is cut, and need to only be cut additional block machine with regard to that can be that interior well casing is changed into independent each internal diameter pipeline section, it is to be replaced after in repair welding
Additional block machine.
, can by setting rubber ring frustum, and the rubber cone piece external diameter of lower floor to be not more than upper rubber ring frustum internal diameter
So that easily interior well casing is put into outer well tube, and easily interior well casing is taken out from outer well tube, for dress well and dimension
Shield is brought convenience, and is improved efficiency of construction and is reduced maintenance cost and difficulty.The present invention has tri-level construction structure, its outer well tube one
Secondary property forever uses after going into the well；The Rational structure of interior well casing and outer well tube ensures that interior well casing can be during several years even many decades
Carry out out well servicing；The immersible pump being lifted in interior well casing, can according to be actually needed at any time lifted decline or safeguarded.
4. by the industrialized manufacture in workshop and processing, make product specification unitized and standardize, avoid inside and outside borehole axis
To problem of misalignment, it is ensured that the operability of sealed connection, improve sealing joint quality.It is fast that the standard component of industrialization is beneficial to scene
Speed, it is accurately positioned and constructs.Tubulature speed at least doubles.
5. immersible pump height can be promoted to interior well casing medium position, and without being connected to interior well casing bottom, save
Length of pipe and cable line length, also reduce maintenance difficulties.
Water outlet, the backwater of equivalent are realized in same well, and makes backwater after sufficient heat exchange is carried out with soil, temperature
Degree reaches the leaving water temperature of starting stage；Make simultaneously in backwater and water outlet tube wall contact process, not with having reached initial water outlet
The water outlet of temperature produces new heat exchange, so as to greatly improve water source heat pump units efficiency.Multipair sealing isolation layer composition
Multilayer backwater space, multichannel while the purpose of backwater are realized, then by means of high pressure backwater, it is ensured that individual well can complete whole backwater
Task.By means of annular permeable layer and soil horizon, water return flow speed is reduced, is fully entered so as to backwater and the stratum of temperature height
Backwater is being summarized in underground water after the cold and hot exchange of row, is being finally reached the purpose of same well water resources circulation.So as to avoid water resource
Waste, avoid level of ground water from declining because mobile even exhausted, it is ensured that subsurface structure stably and surrounding building safety.This
Mode makes underground water be in air-tight state all the time, and first, to water in itself without any pollution；Second, underground water is not wasted at all；
3rd, due to going out water source well casing using combined type, by the backwater of the cold taken away or heat by air exclusion, thoroughly shut out
Contact between absolutely, so as not to produce new heat exchange because going out, the temperature difference of backwater, maintain the perseverance of leaving water temperature
It is fixed.The present invention by the water of extraction by whole recharges to underground, veritably accomplished the only heat of " utilization " underground water and cold and
The groundwater resources of preciousness are not wasted.Floor space is small, ensure that level of ground water is normal, and does not interfere with the basis of building,
So that the narrow and small place of area can also use the water-source heat-pump central air conditioner of energy-conservation.
Brief description of the drawings
Fig. 1 is the cross-sectional view of the present invention.
Label 1 is outer well tube in figure, and 2 be interior well casing, and 3 be outlet pipe, and 4 be return pipe, and 5 be well lid, and 6 be that rubber ring is bored
Platform, 7 be liner plate, and 8 be rubber cone piece, and 9 be sleeve pipe, and after 10 are plus block machine, 11 be interior block machine, and 12 be O-ring seal, and 13 is dive under water
Pump, 14 be inside support ring, and 15 be annular permeable layer.
Embodiment：
Embodiment：Referring to Fig. 1, a kind of water-source heat-pump central air conditioner water supply well interconnection system is the same as well backflow device, including water source
Well and well lid 5, interior well casing 2 and outer well tube 1, outlet pipe 3, return pipe 4 and immersible pump 13, annular permeable layer 15 etc..
Wherein, outer well tube 1 is sleeved on the inside of water supply well, and being provided with annular between the borehole wall and outer well tube 1 of water supply well oozes
Water layer 15.Various informative, such as following three kinds of structures of annular permeable layer 15：（1）Integral annular seepage material can be made；
（2）Annular permeable layer 15 can be set inside and outside supporting network and including, in outer support net sandwich fill seepage material；（3）Annular
Permeable layer 15 is the gravel material being filled between support water-permeable pipe and soil horizon.
Outer well tube 1, which is located on the tube wall between taper isolation supporting layer, sets permeable hole.
Interior well casing 2 is set in the center of outer well tube 1, and it is close by multilayer taper to isolate supporting layer between interior well casing 2 and outer well tube 1
Envelope connection and support.Taper isolation supporting layer is that inside support ring 14 is set in the inwall relevant position of outer well tube 1, outside inside support ring 14
Rubber ring frustum 6 is fixed in side, and rubber cone piece 8 is set on the interior outer wall of well casing 2, and the upper side of rubber cone piece 8 has additional gold
Belong to liner plate 7, the rubber cone piece 8 can match suit and support with the conical surface of rubber ring frustum 6, reach and be tightly connected and can prop up
The effect of support.
Outlet pipe 3 carries immersible pump 13 and is lifted on below the waterline in interior well casing 2, and H1 is lower water level in Fig. 1, and H2 is upper
Water level, immersible pump 13 are located under lower water level.
Taper isolation supporting layer is provided with through hole so that return pipe 4 can pass through and seal.Multiple return pipes 4 pressurize respectively
After be drained between each taper isolation supporting layer in region, backwater is entered by the side wall permeable hole of outer well tube 1 under pressure
Enter annular permeable layer 15, then underground water is flowed downwardly into by annular permeable layer 15, or after annular permeable layer 15 enters soil horizon again
Underground water is flowed into, reaches heat exchange purpose.
Interior well casing 2 is provided with collocation structure.At least two kinds of the form of collocation structure：（1）The upper end of well casing 2 in bottom
Mouth setting sleeve pipe 9, block machine 11, interior block machine 11 are located in sleeve pipe 9 and are set with O-shaped in the lower port setting of well casing 2 in top
Sealing ring 12, and add block machine 10 after the upper port of sleeve pipe 9 is fixed with；（2）The lower port of well casing 2 sets sleeve pipe 9 in top,
Block machine 11, interior block machine 11 are located in sleeve pipe 9 and are set with O-ring seal 12 in the upper and lower port setting of well casing 2 in bottom, and
Add block machine 10 after the lower port of sleeve pipe 9 is fixed with.Collocation structure can make interior well casing 2 have certain telescopic extensions, so as to allow
Interior well casing 2 and outer well tube 1 length is not completely equivalent, and is influenceed so as to ignore error component, is simplified design requirement, reduces construction
Difficulty, there is provided efficiency of construction.The compensating action that inner tube is stretched or contracted automatically, multiple isolation supporting layers in the blind area of underground are overcome to dock not
Tight problem and load inequality problem, it is independent weight bearing structure to make each 2 sections of interior well casing, and each supporting layer of isolating only undertakes its upside
The gravity of one section of inner tube, without sharing the gravity of other each section of inner tube, so as to avoid being sealed caused by local support dynamics is excessive
Face premature aging problem, also avoid because of local support dynamics not enough seepy question.
Go out by interior well casing 2 in well servicing or Renewal process, although interior well casing 2 is up to hundred meters, led without internal well casing 2
Body is cut, and need to only be cut additional block machine with regard to that can be that interior well casing 2 is changed into independent each internal diameter pipeline section, it is to be replaced after in repair welding
Additional block machine.
The external diameter of rubber cone piece 8 of lower floor is not more than the internal diameter of upper rubber ring frustum 6, easily can put interior well casing 2
Enter in outer well tube 1, and easily take out interior well casing 2 from outer well tube 1, brought convenience for dress well and maintenance, raising is applied
Work efficiency rate and reduction maintenance cost and difficulty.
Outer well tube 1 forever uses after disposably going into the well；The Rational structure of interior well casing 2 and outer well tube 1 ensures that interior well casing 2 can be with
Well servicing is carried out out during several years even many decades；The immersible pump 13 being lifted in interior well casing 2, can according to be actually needed with
Shi Tisheng or decline are safeguarded.Furthermore it is also possible to be air heat-insulation layer between outlet pipe 3 and interior well casing 2, or going out
Perfusion heat-barrier material forms thermal insulation layer in interlayer between water pipe 3 and interior well casing 2, to avoid recharge water from producing cold and hot friendship with water outlet
Change.
Claims (5)
1. a kind of compensation shallow layer geothermal energy of geothermal energy central air-conditioning is the same as well conversion equipment, including water supply well and well lid, interior well
Pipe and outer well tube, outlet pipe, return pipe and immersible pump, it is characterized in that：The outer well tube is sleeved on the inside of water supply well, interior well casing set
Loaded on outer well tube center, at least two layers of taper is provided between interior well casing and outer well tube and isolates supporting layer；Outer well tube is located at taper
Permeable hole is set on tube wall between isolation supporting layer；Outlet pipe carries immersible pump and is lifted on below the waterline in interior well casing,
Multiple return pipes are drained between each taper isolation supporting layer in region respectively；The interior well casing is provided with collocation structure, should
Collocation structure is to set sleeve pipe in the port of interior well casing one, and the block machine in the setting of the port of interior well casing two, interior block machine is located at sleeve pipe
In and be set with O-ring seal, and after sleeve port is fixed with plus block machine.
2. the compensation shallow layer geothermal energy of geothermal energy central air-conditioning according to claim 1 is the same as well conversion equipment, its feature
It is：The taper isolation supporting layer is that rubber ring frustum is provided with outer well tube inwall relevant position, and on interior well casing outer wall
Rubber cone piece is set, and the upper side of rubber cone piece has additional metal backing, the conical surface of the rubber cone piece and rubber ring frustum
Suit and support can be matched；Rubber cone piece external diameter positioned at lower floor is not more than upper rubber ring frustum internal diameter.
3. the compensation shallow layer geothermal energy of geothermal energy central air-conditioning according to claim 2 is the same as well conversion equipment, its feature
It is：Taper isolation supporting layer is to set inside support ring in outer well tube inwall relevant position, and the rubber ring frustum is fixed on interior branch
On the outside of pushing out ring.
4. the compensation shallow layer geothermal energy of geothermal energy central air-conditioning according to claim 1 is the same as well conversion equipment, its feature
It is：It is air heat-insulation layer between outlet pipe and interior well casing, or is irrigated in the interlayer between outlet pipe and interior well casing heat-insulated
Material forms thermal insulation layer, to avoid recharge water from producing cold and hot exchange with water outlet.
5. the compensation shallow layer geothermal energy of geothermal energy central air-conditioning according to claim 1 is the same as well conversion equipment, its feature
It is：Annular permeable layer is provided between the borehole wall and outer well tube of water supply well, the annular permeable layer is integral annular infiltration material
Material, seepage material or annular are filled including either annular permeable layer is provided with inside and outside supporting network simultaneously, in outer support net sandwich
Permeable layer is the gravel material being filled between support water-permeable pipe and soil horizon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510220172.4A CN104896634B (en) | 2015-05-04 | 2015-05-04 | The compensation shallow layer geothermal energy of geothermal energy central air-conditioning is the same as well conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510220172.4A CN104896634B (en) | 2015-05-04 | 2015-05-04 | The compensation shallow layer geothermal energy of geothermal energy central air-conditioning is the same as well conversion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104896634A CN104896634A (en) | 2015-09-09 |
| CN104896634B true CN104896634B (en) | 2018-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510220172.4A Expired - Fee Related CN104896634B (en) | 2015-05-04 | 2015-05-04 | The compensation shallow layer geothermal energy of geothermal energy central air-conditioning is the same as well conversion equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352210A (en) * | 2015-11-11 | 2016-02-24 | 河南润恒节能技术开发有限公司 | Shallow geothermal energy device with pumping and recharging in same well |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3652974B2 (en) * | 2000-09-26 | 2005-05-25 | ダイダン株式会社 | Primary pump heat source variable flow rate system |
| CN103982961A (en) * | 2014-03-25 | 2014-08-13 | 河南润恒节能技术开发有限公司 | Hose type water outlet and return device in same water source well for water source heat pump central air conditioner |
| CN104501464B (en) * | 2014-12-18 | 2017-02-01 | 河南润恒节能技术开发有限公司 | Inside-outside integral docking type same-well pumping and recharging device for water source well of water source heat pump type central air conditioning |
| CN204730370U (en) * | 2015-05-04 | 2015-10-28 | 河南润恒节能技术开发有限公司 | The compensation shallow layer geothermal energy of geothermal energy central air-conditioning is with well conversion equipment |
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