CN201269571Y - Heat supply system of multifunctional distributed variable-frequency two-stage pump - Google Patents
Heat supply system of multifunctional distributed variable-frequency two-stage pump Download PDFInfo
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- CN201269571Y CN201269571Y CNU200820136105XU CN200820136105U CN201269571Y CN 201269571 Y CN201269571 Y CN 201269571Y CN U200820136105X U CNU200820136105X U CN U200820136105XU CN 200820136105 U CN200820136105 U CN 200820136105U CN 201269571 Y CN201269571 Y CN 201269571Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
A multifunctional distribution-typed frequency-conversion secondary pump heating system comprises an indoor hot water circulation loop and an outer network hot water circulation loop and is characterized in that the outer network hot water circulation loop comprises a plurality of direct heat supply circulation loops and indirect heat supply circulation loops which are connected in parallel; a sharing decoupling pipe is connected between the water supply pipeline and the backwater pipeline of the indoor hot water circulation loop and the outer network hot water circulation loop; an electric two-way valve is arranged on the sharing decoupling pipe; the direct heat supply circulation loops are connected in series with a confluent electric three-way valve, a secondary circulation pump, a terminal direct heat use device and a check valve; the indirect heat supply circulation loops are connected in series with the secondary circulation pump, a terminal indirect heat use device and the check valve; the secondary circulation pump is connected with a frequency control device; the two sides of the terminal indirect heat use device are connected in series with the secondary circulation pump and the heat user; the system is provided with an outdoor environment sensor which conducts real-time monitoring, a control circuit, a water temperature sensor and a water pressure sensor; and the system reduces the power consumption of a heat supply system and the bearing pressure of a boiler, so the boiler has long service life and good security and practicality.
Description
Technical field
The utility model relates to a kind of heating system, particularly relate to a kind of entire system heating efficiency that improves, be applicable to that with fire coal, combustion gas, fuel oil be fuel, adopt the multi-functional distributed frequency conversion two stage pump heating system of direct-type, indirect type or hybrid hot water heating mode.
Background technology
At present, the hot water heating mode is delivered directly to hot user by pipeline with the hot water that boiler produces, or is transported to hot user again after sending heat to the secondary heat supply pipeline by the heat exchanger in the heat exchange station.Heating system provides hot water circuit power by the circulating pump that is located at the boiler room.Because area of heat-supply service is bigger usually, the heating tube line length, heat exchange station is many, complicated layout, so the general selection of circulating pump is more high-lift to overcome the resistance of whole heating system.For the indirect heating system, its heat exchange station secondary side must be provided with the secondary water-circulating pump, and its lift and flow must satisfy unfavorable user's heating demand.
This heating system mode has following shortcoming: because circulating pump provides enough available pressure heads must for the hot user of outer net index circuit (being generally distal-most end), therefore nearer hot user just has too much available pressure from the boiler room, need to install flow control valve and consume this part energy, the energy that consumes finally comes from circulating pump, make that heating system power consumption is big, the defeated ratio of specific heat of power consumption is big; Boiler is located at circulating-pump outlet, makes that (0.5～1.3MPa) time work because the air that dissolves in the water in the use can corrode boiler, descends the bearing strength of boiler to boiler gradually, and boiler exists the potential safety hazard of bearing capacity deficiency at high pressure always; For the boiler room in the work, in case the loss of power accident takes place, the water in the boiler will stop circulation at once, and boiler afterheat can continue heat hot water, and security incidents such as pot water vapor even the generation bursting of boilers may take place; For the direct heating system, boiler operating parameter and hot user's operational factor gap are bigger, general boiler design water temperature is more than 100 ℃, and hot user only needs 50～60 ℃, tradition direct heating system boiler is in cold operation, and general heat supply water temperature is no more than 60 ℃, causes boiler efficiency low, quantity of circulating water is big, and the defeated ratio of specific heat of power consumption is big; For the indirect heating system, because its secondary water-circulating pump can't be regulated flow, cause first, last cold phase quantity of circulating water big easily, the defeated ratio of specific heat of power consumption is big.
Utility model patent 200720169829.X " distributed frequency conversion two stage pump hot-water boiler heating system " can't solve the direct heating system and mix the problems referred to above that exist in the heating system.
In view of this, in order to address the above problem, this creator is according to oneself practical experience and technical concept, after deliberation, exploitation, and has the utility model to produce eventually.
The utility model content
The utility model is that multi-functional distributed frequency conversion two stage pump heating system will be provided, and reduces the technical problem of the defeated ratio of specific heat of power consumption, reduction boiler bearing requirements, raising hot-water boiler service life and the security of direct-type, indirect type and hybrid hot-water boiler heating system with solution.
It is such solving the problems of the technologies described above the technical scheme that is adopted:
A kind of multi-functional distributed frequency conversion two stage pump heating system, the indoor hot water circulation loop and the outer net hot water circulation loop that comprise the boiler room, indoor hot water circulation loop comprises boiler, water supply line, return piping, main circulation pump, the RHVC of main circulation pump and control module, the outer net hot water circulation loop includes the water supply line that is connected with the boiler water supply pipeline, return piping that is connected with the boiler blow-down water pipeline and hot user, it is characterized in that: this outer net hot water circulation loop comprises a plurality of direct heating closed circuits that are connected in parallel and indirect heating closed circuit, each direct heating closed circuit is through water supply line, return piping is connected in series with the terminal thermic devices of directly using, each indirect heating closed circuit is through water supply line, return piping is connected in series with end and uses thermic devices indirectly, and this end is in series with secondary water-circulating pump and hot user with the thermic devices secondary side indirectly;
Be connected a shared decoupling zero pipe between the water supply line of indoor hot water circulation loop in boiler room and outer net hot water circulation loop junction and the return piping, be equiped with an electric two-way valve on the decoupling zero pipe, each directly is in series with check-valves, interflow electric T-shaped valve and secondary circulating pump with soft circulation circuit, each is in series with check-valves and secondary circulating pump with soft circulation circuit indirectly, and above-mentioned each secondary circulating pump connects a RHVC;
Be provided with control module and outdoor environment sensor in this boiler room, boiler export is provided with the boiler water supply cooling-water temperature sensor, the main circulation pump inlet is provided with main circulation pump inlet water temperature sensor, wherein, control module is connected with the RHVC of outdoor environment sensor, boiler water supply cooling-water temperature sensor, main circulation pump inlet water temperature sensor, electric two-way valve and main circulation pump respectively by control circuit;
This end directly is provided with outdoor environment sensor, inlet water temperature sensor, inlet pressure transducer, outlet pressure sensor and the terminal hot weather compensation arrangement of using with the thermic devices place, wherein, the terminal hot weather compensation arrangement of using links to each other with the RHVC of outdoor environment sensor, inlet water temperature sensor, inlet pressure transducer, outlet pressure sensor, interflow electric T-shaped valve and secondary circulating pump respectively by control circuit;
This end is provided with outdoor environment sensor, secondary water-supply temperature sensor, secondary return water temperature sensor and the terminal hot weather compensation arrangement of using with the secondary side of thermic devices indirectly, wherein, the terminal hot weather compensation arrangement of using links to each other with the RHVC of outdoor environment sensor, secondary water-supply temperature sensor, secondary return water temperature sensor, secondary circulating pump and the RHVC of secondary water-circulating pump respectively by control circuit.
The multi-functional distributed frequency conversion two stage pump heating system that the utility model provides, RHVC by control module and main circulation pump, user's temperature according to outdoor environment parameter (as temperature, wind speed, radiation at sunshine etc.), boiler water supply and the main circulation pump inlet water temperature difference and setting, automatically the load of boiler and the frequency of main circulation pump are controlled in real time, at the gross heat input of the basic adjusted boiler that guarantees the minimum discharge of boiler, reach the effect of " heating according to need ", fuel savings and electric weight.
This heating system, directly use the RHVC of hot weather compensation arrangement and secondary circulating pump with the end at thermic devices place by end, temperature according to outdoor environment parameter (as temperature, wind speed, radiation at sunshine etc.), outer net water supply and return water temperature and user's setting, automatically the frequency of secondary circulating pump and the aperture of interflow electric T-shaped valve are controlled in real time, satisfy end and directly use hot needs, reach the effect of " heat-obtaining as required " and save power simultaneously.
This heating system, use the RHVC of hot weather compensation arrangement and secondary circulating pump indirectly with the end at thermic devices place by end, temperature according to outdoor environment parameter (as temperature, wind speed, radiation at sunshine etc.), outer net water supply and return water temperature and user's setting, automatically the frequency of secondary circulating pump is controlled in real time, satisfy end and use hot needs indirectly, reach the effect of " heat-obtaining as required " and save power simultaneously; Simultaneously, use the RHVC of the secondary water-circulating pump of thermic devices secondary side indirectly by end, according to heating season different times to the different demands of the secondary cycle water yield, frequency to the secondary water-circulating pump is controlled in real time, satisfy hot user's the heat demand of using, reach the effect of save power simultaneously.
The utility model is simple in structure, and its advantage is as follows:
1, the utility model can make the boiler room main circulation pump rated power than the remarkable reduction of conventional boiler room circulating pump more than 50%, the total specified power of main circulation pump of the present utility model and secondary circulating pump is suitable with conventional boiler room circulating pump, and by control module, with the control work of hot weather compensation arrangement and RHVCs at different levels, the power that consumes during the utility model real work also will obviously reduce, and can significantly reduce the defeated ratio of specific heat of power consumption of heating system.
2, the utility model can make the boiler pressure-bearing 0.1～0.8MPa that descends, but therefore prolonged boiler service life has practicality.
3, the utility model can rely on end to keep boiler with the secondary circulating pump at thermic devices place and reach trouble free service discharge when accident be cut off the power supply for boiler, to avoid the danger of boiler vaporization even blast, has security.
4, but the utility model flexible Application has practicality in direct-type heating system, indirect type heating system and direct, indirect hybrid heating system.
5, the utility model can improve the boiler water supply temperature, helps reducing the circulating water flow of whole heating system, reduces the defeated ratio of specific heat of power consumption.
6, the utility model can reduce the terminal of indirect heating closed circuit and reduce the defeated ratio of specific heat of power consumption indirectly with the circulating water flow of thermic devices (heat exchange station) secondary side, and the tool practicality.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, be structural representation of the present utility model, this multi-functional distributed frequency conversion two stage pump heating system, the indoor hot water circulation loop 100 and the outer net hot water circulation loop 200 that comprise boiler room 1, indoor hot water circulation loop 100 comprises boiler 10, water supply line 11, return piping 12, main circulation pump 13, the RHVC 18 of main circulation pump 13 and control module 16, outer net hot water circulation loop 200 includes the water supply line 31 that is connected with boiler water supply pipeline 11, return piping 32 that is connected with boiler blow-down water pipeline 12 and hot user 69, wherein, this outer net hot water circulation loop 200 comprises a plurality of direct heating closed circuits 201 that are connected in parallel and indirect heating closed circuit 202, each direct heating closed circuit 201 is through water supply line 31, return piping 32 is connected in series with terminal directly with thermic devices 30, each indirect heating closed circuit 202 is through water supply line 31, return piping 32 is connected in series with terminal indirectly with thermic devices 50, and this end is in series with secondary water-circulating pump 63 and hot user 69 with thermic devices 50 secondary sides indirectly;
Be connected a shared decoupling zero pipe 14 between the water supply line 11,31 of boiler room 1 indoor hot water circulation loop 100 and outer net hot water circulation loop 200 junctions and the return piping 12,32, be equiped with an electric two-way valve 15 on the decoupling zero pipe 14, each directly is in series with check-valves 35, interflow electric T-shaped valve 34 and secondary circulating pump 33 with soft circulation circuit 201, each is in series with check-valves 35 and secondary circulating pump 33 with soft circulation circuit 202 indirectly, and above-mentioned each secondary circulating pump 33 connects a RHVC 41;
Be provided with control module 16 and outdoor environment sensor 17 in this boiler room 1, boiler 1 outlet is provided with boiler water supply cooling-water temperature sensor 19, main circulation pump 13 inlets are provided with main circulation pump inlet water temperature sensor 20, wherein, control module 16 is connected with the RHVC 18 of outdoor environment sensor 17, boiler water supply cooling-water temperature sensor 19, main circulation pump inlet water temperature sensor 20, electric two-way valve 15 and main circulation pump respectively by control circuit 21;
This end directly is provided with outdoor environment sensor 36, inlet water temperature sensor 37, inlet pressure transducer 42, outlet pressure sensor 38 and terminal with hot weather compensation arrangement 39 with thermic devices 30 places, wherein, the terminal hot weather compensation arrangement 39 of using links to each other 41 with the RHVC of outdoor environment sensor 36, inlet water temperature sensor 37, inlet pressure transducer 42, outlet pressure sensor 38, interflow electric T-shaped valve 34 and secondary circulating pump 33 respectively by control circuit 40;
This end is provided with outdoor environment sensor 36, secondary water-supply temperature sensor 57, secondary return water temperature sensor 58 and terminal with hot weather compensation arrangement 39 with the secondary side of thermic devices 50 indirectly, wherein, the terminal hot weather compensation arrangement 39 of using links to each other with the RHVC 41 of outdoor environment sensor 36, secondary water-supply temperature sensor 57, secondary return water temperature sensor 58, secondary circulating pump 33 and the RHVC 62 of secondary water-circulating pump 63 respectively by control circuit 40.
When this multi-functional distributed frequency conversion two stage pump heating system turned round, the indoor hot water circulation loop 100 and the outer net hot water circulation loop 200 of boiler room 1 can be worked respectively or simultaneously.
During work, control module 16 in the indoor hot water circulation loop 100 of boiler room 1 is by collecting by outdoor environment sensor 17, boiler water supply cooling-water temperature sensor 19, the signal that main circulation pump inlet water temperature sensor 20 is gathered also compares and calculates with the parameter of setting, determine the ideal operation frequency of main circulation pump 13, again this frequency signal is sent to the RHVC 18 of main circulation pump 13, automatically the frequency of main circulation pump 13 is controlled in real time, gross heat input at the basic adjusted boiler 1 of the minimum discharge of maintenance bond reaches " heating according to need ", the effect of fuel savings and electric weight.
Directly using in the soft circulation circuit 201 of outer net hot water circulation loop 200, the terminal hot weather compensation arrangement 39 of using is by collecting by outdoor environment sensor 36, inlet pressure transducer 42, inlet temperature sensor 37, the signal that outlet pressure sensor 38 is gathered also compares and calculates with the parameter of end with 39 settings of hot weather compensation arrangement, determine the ideal operation frequency of secondary circulating pump 33 and the aperture of interflow electric T-shaped valve 34, again frequency signal is sent to the RHVC 41 of secondary circulating pump 33, automatically the frequency of secondary circulating pump 33 is controlled in real time, the aperture signal is sent to interflow electric T-shaped valve 34, automatically the aperture of interflow electric T-shaped valve 34 is implemented control, reach the effect of " heat-obtaining as required " and save power.
Use in the soft circulation circuit 202 the indirect of outer net hot water circulation loop 200, end compares and calculates by collecting by the signal of outdoor environment sensor 36, secondary water-supply temperature sensor 57 and with the parameter of end with 39 settings of hot weather compensation arrangement with hot weather compensation arrangement 39, determine the ideal operation frequency of secondary circulating pump 33, again this frequency signal is sent to the RHVC 41 of secondary circulating pump 33, automatically the frequency of secondary circulating pump 33 is controlled in real time, reached the effect of " heat-obtaining as required " and save power.
Use the secondary side of thermic devices 50 endways indirectly, end compares and calculates by collecting by the signal of outdoor environment sensor 36, secondary water-supply temperature sensor 57, secondary return water temperature sensor 58, employing and with the parameter of end with 39 settings of hot weather compensation arrangement with hot weather compensation arrangement 39, determine the ideal operation frequency of secondary water-circulating pump 63, again this frequency signal is sent to the RHVC 62 of secondary water-circulating pump 63, automatically the frequency of secondary water-circulating pump 63 is controlled in real time, reached the effect of " heating according to need " and amount of electricity saving.
In sum, effect of the present utility model has tangible lifting, has practicality, meets each important document of utility model patent, so propose utility application in accordance with the law.
Claims (4)
1, a kind of multi-functional distributed frequency conversion two stage pump heating system, the indoor hot water circulation loop and the outer net hot water circulation loop that comprise the boiler room, indoor hot water circulation loop comprises boiler, water supply line, return piping, main circulation pump, the RHVC of main circulation pump and control module, the outer net hot water circulation loop includes the water supply line that is connected with the boiler water supply pipeline, return piping that is connected with the boiler blow-down water pipeline and hot user, it is characterized in that: this outer net hot water circulation loop comprises a plurality of direct heating closed circuits that are connected in parallel and indirect heating closed circuit, each direct heating closed circuit is through water supply line, return piping is connected in series with the terminal thermic devices of directly using, each indirect heating closed circuit is through water supply line, return piping is connected in series with end and uses thermic devices indirectly, and this end is in series with secondary water-circulating pump and hot user with the thermic devices secondary side indirectly;
Be connected a shared decoupling zero pipe between the water supply line of indoor hot water circulation loop in boiler room and outer net hot water circulation loop junction and the return piping, be equiped with an electric two-way valve on the decoupling zero pipe, each directly is in series with check-valves, interflow electric T-shaped valve and secondary circulating pump with soft circulation circuit, each is in series with check-valves and secondary circulating pump with soft circulation circuit indirectly, and above-mentioned each secondary circulating pump connects a RHVC.
2, multi-functional distributed frequency conversion two stage pump heating system according to claim 1, it is characterized in that: be provided with control module and outdoor environment sensor in this boiler room, boiler export is provided with the boiler water supply cooling-water temperature sensor, the main circulation pump inlet is provided with main circulation pump inlet water temperature sensor, wherein, control module is connected with the RHVC of outdoor environment sensor, boiler water supply cooling-water temperature sensor, main circulation pump inlet water temperature sensor, electric two-way valve and main circulation pump respectively by control circuit.
3, multi-functional distributed frequency conversion two stage pump heating system according to claim 2, it is characterized in that: this end directly is provided with outdoor environment sensor, inlet water temperature sensor, inlet pressure transducer, outlet pressure sensor and the terminal hot weather compensation arrangement of using with the thermic devices place, wherein, the terminal hot weather compensation arrangement of using links to each other with the RHVC of outdoor environment sensor, inlet water temperature sensor, inlet pressure transducer, outlet pressure sensor, interflow electric T-shaped valve and secondary circulating pump respectively by control circuit.
4, multi-functional distributed frequency conversion two stage pump heating system according to claim 3, it is characterized in that: this end is provided with outdoor environment sensor, secondary water-supply temperature sensor, secondary return water temperature sensor and the terminal hot weather compensation arrangement of using with the secondary side of thermic devices indirectly, wherein, the terminal hot weather compensation arrangement of using links to each other with the RHVC of outdoor environment sensor, secondary water-supply temperature sensor, secondary return water temperature sensor, secondary circulating pump and the RHVC of secondary water-circulating pump respectively by control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200820136105XU CN201269571Y (en) | 2008-09-28 | 2008-09-28 | Heat supply system of multifunctional distributed variable-frequency two-stage pump |
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| CNU200820136105XU CN201269571Y (en) | 2008-09-28 | 2008-09-28 | Heat supply system of multifunctional distributed variable-frequency two-stage pump |
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| CN201269571Y true CN201269571Y (en) | 2009-07-08 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777959A (en) * | 2012-08-24 | 2012-11-14 | 江苏联宏自动化系统工程有限公司 | Heat supply regulating and controlling method based on water mixing device |
| CN102913991A (en) * | 2012-06-11 | 2013-02-06 | 北京金房暖通节能技术有限公司 | Central heating distributive frequency conversion two-stage pump system energy-saving control method |
| CN102944034A (en) * | 2012-11-28 | 2013-02-27 | 哈尔滨工业大学 | Multistage distributed water pump heat supply system and design method thereof |
| CN102966991A (en) * | 2012-12-19 | 2013-03-13 | 哈尔滨工业大学 | Distributed water mixing and pressurized heat supply system having decoupling function and design method of system |
| CN103528110A (en) * | 2013-10-12 | 2014-01-22 | 新疆明和节能科技有限公司 | Heat supply system for community |
| CN104930576A (en) * | 2015-06-29 | 2015-09-23 | 北京合利能科技有限公司 | Highly-stable anticorrosion complete set heat supply system |
| CN107543229A (en) * | 2017-09-06 | 2018-01-05 | 天津市爱默森电气科技有限公司 | Control device, the method and apparatus of heating heat-exchange station pipe network |
| CN115823639A (en) * | 2022-12-05 | 2023-03-21 | 哈尔滨无双利能科技发展有限公司 | Direct heat supply and indirect heat supply system based on boiler |
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2008
- 2008-09-28 CN CNU200820136105XU patent/CN201269571Y/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102913991A (en) * | 2012-06-11 | 2013-02-06 | 北京金房暖通节能技术有限公司 | Central heating distributive frequency conversion two-stage pump system energy-saving control method |
| CN102913991B (en) * | 2012-06-11 | 2017-11-10 | 北京金房暖通节能技术股份有限公司 | Central heating distributive frequency conversion two-stage pump system energy-saving control method |
| CN102777959A (en) * | 2012-08-24 | 2012-11-14 | 江苏联宏自动化系统工程有限公司 | Heat supply regulating and controlling method based on water mixing device |
| CN102777959B (en) * | 2012-08-24 | 2014-11-26 | 江苏联宏自动化系统工程有限公司 | Heat supply regulating and controlling method based on water mixing device |
| CN102944034A (en) * | 2012-11-28 | 2013-02-27 | 哈尔滨工业大学 | Multistage distributed water pump heat supply system and design method thereof |
| CN102944034B (en) * | 2012-11-28 | 2015-05-13 | 哈尔滨工业大学 | Multistage distributed water pump heat supply system and design method thereof |
| CN102966991B (en) * | 2012-12-19 | 2014-12-10 | 哈尔滨工业大学 | Distributed water mixing and pressurized heat supply system having decoupling function and design method of system |
| CN102966991A (en) * | 2012-12-19 | 2013-03-13 | 哈尔滨工业大学 | Distributed water mixing and pressurized heat supply system having decoupling function and design method of system |
| CN103528110A (en) * | 2013-10-12 | 2014-01-22 | 新疆明和节能科技有限公司 | Heat supply system for community |
| CN104930576A (en) * | 2015-06-29 | 2015-09-23 | 北京合利能科技有限公司 | Highly-stable anticorrosion complete set heat supply system |
| WO2017000588A1 (en) * | 2015-06-29 | 2017-01-05 | 北京合利能科技有限公司 | Complete set of highly stable anti-corrosive heat supply systems |
| CN104930576B (en) * | 2015-06-29 | 2018-02-09 | 北京合利能科技有限公司 | The complete heating system of high steady anti-corrosion |
| CN107543229A (en) * | 2017-09-06 | 2018-01-05 | 天津市爱默森电气科技有限公司 | Control device, the method and apparatus of heating heat-exchange station pipe network |
| CN115823639A (en) * | 2022-12-05 | 2023-03-21 | 哈尔滨无双利能科技发展有限公司 | Direct heat supply and indirect heat supply system based on boiler |
| CN115823639B (en) * | 2022-12-05 | 2023-06-06 | 哈尔滨无双利能科技发展有限公司 | Direct heating and indirect heating system based on boiler |
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Address after: 100021, Beijing, Chaoyang District Warwick North 18 floor Patentee after: Beijing Kingfore HVAC Energy Saving Technology Co., Ltd. Patentee after: Changping District Beijing heating service management department Address before: 100021, Beijing, Chaoyang District Warwick North 18 floor Patentee before: Beijing Kingfore HVAC Energy-Saving Technology Co.,Ltd. Patentee before: Changping District Beijing heating service management department |
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Granted publication date: 20090708 |
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