CN110131783B - High-efficiency energy-saving central heating automatic control device - Google Patents
High-efficiency energy-saving central heating automatic control device Download PDFInfo
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- CN110131783B CN110131783B CN201910403812.3A CN201910403812A CN110131783B CN 110131783 B CN110131783 B CN 110131783B CN 201910403812 A CN201910403812 A CN 201910403812A CN 110131783 B CN110131783 B CN 110131783B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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Abstract
The invention discloses an efficient energy-saving centralized heating automatic control device, and belongs to the field of centralized heating automatic control devices. The utility model provides an energy-efficient centralized heating automated control device, advance structural design to the centralized heating device, make the device possess the heat supply transfer, three kinds of functions of secondary circulation collection and water supply rate adjustment again, through saying that the effectual synthesis of these three, can play energy-efficient effect, make the inside constant voltage that keeps of device through setting up a plurality of force pumps, thereby make the inside regulation to the water supply flow of device more simple and convenient, it is too big to the inside pressure of device in order to guarantee outside centralized heating, thereby be provided with the case of intaking, make things convenient for the secondary circulation pipe network to transport, through the circulating water with in the secondary circulation pipe network, reprocess through shell and tube heat exchanger, both can the recovery of energy assurance, also can reduce the energy of transportation consumption, and it can effectually adjust the water supply circulation volume of device to be provided with pipeline adjustment mechanism.
Description
Technical Field
The invention relates to the field of centralized heating automatic control devices, in particular to a high-efficiency energy-saving centralized heating automatic control device.
Background
At present, the urban central heating is to heat cold water to a specified temperature by a thermal power plant or a boiler room in a form of burning coal, and then send hot water to an end user for heating by a local heating company in a heat exchange mode again. However, in the process of delivering cold water to a user through a pipeline by the heat exchange station, the hot water is leaked, overflowed and dripped, and for this reason, cold water needs to be continuously supplemented into the heating system. The hot water heated to a specified temperature by cold water needs a thermal power plant or a boiler room to burn more coal, so that not only is the coal burning cost and environmental pollutants increased, but also the comfort level in a user room is greatly influenced, and the circulating water circulating in the home of the user cannot be reused.
The existing high-efficiency energy-saving centralized heating automatic control device cannot effectively recycle circulating water in a secondary circulating pipe network.
Disclosure of Invention
The invention aims to solve the problem that circulating water in a secondary circulating pipe network cannot be effectively recycled, and provides an efficient energy-saving centralized heating automatic control device.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic control device for efficient energy-saving centralized heating comprises: fixed shell and tube heat exchanger keep warm still includes: the water inlet tank and the water outlet tank are fixedly arranged on the left side and the right side of the front end in the heat-insulating fixed shell, the circulating water tank is fixedly arranged on the rear end in the heat-insulating fixed shell, connecting holes are formed in the middle parts of the front sides of the water inlet tank and the water outlet tank, the tube type heat exchanger is fixedly arranged on the inner side in the heat-insulating fixed shell, the rear end of the water inlet tank is fixedly connected with a circulating water inlet hole of the tube type heat exchanger through a circulating hot water inlet pipe, the circulating water outlet hole of the tube type heat exchanger is fixedly connected with the circulating water tank through a circulating hot water outlet pipe, the heat exchange water inlet hole of the tube type heat exchanger is fixedly connected with the circulating water tank through a secondary circulating water inlet pipe, the heat exchange water outlet hole of the tube type heat exchanger is fixedly connected with the water inlet tank and the water outlet, the front end of the circulating water tank is fixedly connected with a circulating water inlet mechanism.
Preferably, the primary water outlet mechanism comprises: the water inlet tank comprises a primary water outlet pipe and a multi-interface water outlet pipe, wherein the primary water outlet pipe is fixedly connected with the rear side of the water inlet tank, the outlet of the primary water outlet pipe is fixedly connected with the pipeline adjusting mechanism, the pipeline adjusting mechanism is fixedly connected with the multi-interface water outlet pipe, and the outlet of the multi-interface water outlet pipe is fixedly connected with the heat-insulating fixed shell.
Preferably, the circulating water inlet mechanism comprises: secondary wet return and many interfaces inlet tube, secondary wet return exit and circulating water tank front side fixed connection, secondary wet return import department and pipeline adjustment mechanism fixed connection, pipeline adjustment mechanism and many interfaces inlet tube water inlet fixed connection, many interfaces inlet tube water outlet department and heat preservation fixed casing fixed connection.
Preferably, the automatic adjustment mechanism comprises: the automatic water heater comprises a secondary circulation water outlet pipe, an automatic temperature control valve, a secondary circulation water drain pipe and a secondary circulation recovery pipe, wherein the heat exchange water outlet hole of the tube type heat exchanger is fixedly connected with the water inlet of the automatic temperature control valve through the secondary circulation water outlet pipe, the upper end of the automatic temperature control valve is fixedly connected with the upper end of the secondary circulation recovery pipe, and the middle part of the automatic temperature control valve is fixedly connected with a water outlet tank through the secondary circulation water drain pipe.
Preferably, the duct adjusting mechanism includes: the device comprises a fixed shell, a servo motor, a rotating gear, a transmission gear, a thread rotating gear ring, a moving block, a limiting block, a locking arc-shaped block, a rotating shaft and a rotating bevel gear, wherein the outlet of a primary water outlet pipe and the water inlet of a multi-interface water inlet pipe are fixedly connected with one side of the upper end and the lower end of the fixed shell, the other side of the upper end and the lower end of the fixed shell is fixedly connected with the inlet of a multi-interface water outlet pipe and a secondary water return pipe, the servo motor is fixedly arranged at the middle end in the fixed shell, the front end of a main shaft of the servo motor is fixedly connected with the axis of the rotating gear, the upper side and the lower side of the rotating gear are all meshed and connected with the transmission gear, the axis of the transmission gear is fixedly connected with one end in the rotating shaft, one end, the front side of the threaded rotating gear ring is in threaded connection with a moving block, one end, close to the inner side, of the moving block is fixedly connected with one end, close to the outer side, of the locking arc-shaped block, a limiting block is fixedly mounted on the left side of the moving block, and the servo motor is electrically connected with the central control system.
Preferably, the limiting block is movably sleeved inside the fixed block, the right side of the fixed block is fixedly connected with the fixed ring, and the fixed ring is movably sleeved inside the upper end and the lower end of the fixed shell.
Preferably, pressure pumps are fixedly mounted on the secondary circulation water inlet pipe, the circulation hot water inlet pipe and the primary water outlet pipe, and the pressure pumps are electrically connected with the central control system.
Compared with the prior art, the invention provides an efficient energy-saving centralized heating automatic control device, which has the following beneficial effects:
1. the invention structurally designs a centralized heating device, so that the device has three functions of heat supply transfer, secondary circulation recollection and water supply rate adjustment, and can achieve the effect of high efficiency and energy saving by effectively integrating the three functions.
2. When the automatic regulating mechanism is used, primary hot water in the water inlet tank enters the tubular heat exchanger to exchange heat and reprocess circulating water in a secondary circulating pipe network, so that the circulating water in the secondary circulating pipe network can be reused.
3. When the device is used, the servo motor is started to drive the rotating gear to rotate, the transmission gear is driven to rotate, the rotating shaft is driven to rotate, the rotating bevel gear is driven to rotate, the threaded rotating gear ring is driven to rotate, and the moving block is driven to move along a threaded groove in the threaded rotating gear ring, so that the locking arc-shaped block moves inwards, the inner diameter of the pipeline is changed, the inner diameters of the pipeline of the water outlet pipe and the secondary water return pipe in sequence are adjusted simultaneously, the water supply flow and the water inlet flow can be adjusted simultaneously, the treatment efficiency of the device on circulating water is changed, and the internal circulation adjustment of the device in idling is effectively guaranteed.
Drawings
Fig. 1 is a schematic view of the overall structure of an automatic control device for efficient energy-saving central heating according to the present invention;
FIG. 2 is a schematic view of the overall structure of an automatic control device for efficient energy-saving central heating according to the present invention;
FIG. 3 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
FIG. 4 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
FIG. 5 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
FIG. 6 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
FIG. 7 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
FIG. 8 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
FIG. 9 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
FIG. 10 is a schematic view of a part of the structure of an automatic control device for central heating with high efficiency and energy saving proposed by the present invention;
fig. 11 is a schematic view of a part of the structure of an automatic control device for efficient energy-saving central heating according to the present invention.
The reference numbers in the figures illustrate:
101 heat preservation fixed shell, 102 tubular heat exchanger, 103 secondary circulation inlet pipe, 104 inlet tank, 105 outlet tank, 106 circulation water tank, 107 connecting hole, 108 circulation hot water inlet pipe, 109 circulation hot water outlet pipe, 201 primary outlet pipe, 202 multi-interface outlet pipe, 301 secondary return pipe, 302 multi-interface inlet pipe, 401 secondary circulation outlet pipe, 402 automatic temperature control valve, 403 secondary circulation outlet pipe, 404 secondary circulation recovery pipe, 501 fixed shell, 502 servo motor, 503 rotating gear, 504 transmission gear, 505 thread rotating gear ring, 506 moving block, 507 limiting block, 508 locking arc block, 509 rotating shaft, 510 rotating bevel gear, 601 fixed block, 602 fixed ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
an automatic control device for efficient energy-saving centralized heating comprises: fixed shell 101 and shell and tube heat exchanger 102 keep warm still includes: a water inlet tank 104, a water outlet tank 105 and a circulating water tank 106, wherein the left side and the right side of the front end in the heat-insulating fixed shell 101 are fixedly provided with the water inlet tank 104 and the water outlet tank 105, the rear end in the heat-insulating fixed shell 101 is fixedly provided with the circulating water tank 106, the middle parts of the front sides of the water inlet tank 104 and the water outlet tank 105 are both provided with a connecting hole 107, the inner side in the heat-insulating fixed shell 101 is fixedly provided with a tubular heat exchanger 102, the rear end of the water inlet tank 104 is fixedly connected with a circulating water inlet hole of the tubular heat exchanger 102 through a circulating hot water inlet pipe 108, the circulating water outlet hole of the tubular heat exchanger 102 is fixedly connected with the circulating water tank 106 through a circulating hot water outlet pipe 109, the heat exchange water inlet hole of the tubular heat exchanger 102 is fixedly connected with the circulating water tank 106 through a secondary circulating water inlet pipe 103, the heat exchange water, the front end of the circulating water tank 106 is fixedly connected with a circulating water inlet mechanism.
The mechanism of once going out water includes: the water inlet tank comprises a primary water outlet pipe 201 and a multi-interface water outlet pipe 202, wherein the primary water outlet pipe 201 is fixedly connected with the rear side of the water inlet tank 104, the outlet of the primary water outlet pipe 201 is fixedly connected with a pipeline adjusting mechanism, the pipeline adjusting mechanism is fixedly connected with the multi-interface water outlet pipe 202, and the water outlet of the multi-interface water outlet pipe 202 is fixedly connected with the heat-preservation fixed shell 101.
The circulation mechanism of intaking includes: secondary wet return 301 and many interfaces inlet tube 302, secondary wet return 301 exit and circulating water tank 106 front side fixed connection, secondary wet return 301 import department and pipeline adjustment mechanism fixed connection, pipeline adjustment mechanism and many interfaces inlet tube 302 water inlet fixed connection, many interfaces inlet tube 302 water outlet department and heat preservation fixed casing 101 fixed connection.
And pressure pumps are fixedly arranged on the secondary circulation water inlet pipe 103, the circulation hot water inlet pipe 108 and the primary water outlet pipe 201 and are electrically connected with the central control system.
The central heating device is structurally designed, so that the central heating device has three functions of heat supply transfer, secondary circulation recollection and water supply rate adjustment, the three functions are effectively integrated, the high-efficiency and energy-saving effects can be achieved, the constant pressure is kept in the device by arranging a plurality of pressure pumps, the adjustment of the water supply flow in the device is simpler and more convenient, the water inlet tank 104 is arranged for ensuring that the pressure of external central heating on the inside of the device is too large, the transportation of a secondary circulation pipe network is facilitated, the energy recovery can be ensured, the energy consumed by transportation can be reduced by retreating the circulating water in the secondary circulation pipe network through the tubular heat exchanger 102, and the pipeline adjusting mechanism can effectively adjust the water supply circulation amount of the device.
Example 2: the difference is based on example 1;
the automatic adjustment mechanism includes: the device comprises a secondary circulation water outlet pipe 401, an automatic temperature control valve 402, a secondary circulation water outlet pipe 403 and a secondary circulation recovery pipe 404, wherein a heat exchange water outlet hole of the shell and tube heat exchanger 102 is fixedly connected with a water inlet of the automatic temperature control valve 402 through the secondary circulation water outlet pipe 401, the upper end of the automatic temperature control valve 402 is fixedly connected with the upper end of the secondary circulation recovery pipe 404, and the middle part of the automatic temperature control valve 402 is fixedly connected with the water outlet tank 105 through the secondary circulation water outlet pipe 403.
When the automatic regulating device is used, primary hot water in the water inlet tank 104 enters the tubular heat exchanger 102 to exchange heat and reprocess circulating water in a secondary circulating pipe network, so that the circulating water in the secondary circulating pipe network can be reused, the circulating water in the tubular heat exchanger 102 passes through the secondary circulating water outlet pipe 401 and then is transported to the water inlet tank 104 or the water outlet tank 105 through the automatic temperature control valve 402 to reprocess the circulating water in the secondary circulating pipe network, and the circulating consumption in the pipe network and the transportation consumption during reheating can be effectively saved.
Example 3: the difference is based on examples 1 and 2;
the pipeline adjustment mechanism includes: the device comprises a fixed shell 501, a servo motor 502, a rotating gear 503, a transmission gear 504, a thread rotating gear ring 505, a moving block 506, a limiting block 507, a locking arc block 508, a rotating shaft 509 and a rotating bevel gear 510, wherein an outlet of a primary water outlet pipe 201 and a water inlet of a multi-interface water inlet pipe 302 are fixedly connected with one side of the upper end and the lower end of the fixed shell 501, the other side of the upper end and the lower end of the fixed shell 501 is fixedly connected with an inlet of a multi-interface water outlet pipe 202 and a secondary water return pipe 301, the servo motor 502 is fixedly installed at the middle end inside the fixed shell 501, the front end of a main shaft of the servo motor 502 is fixedly connected with the axle center of the rotating gear 503, the upper side and the lower side of the rotating gear 503 are both meshed with the transmission gear 504, the axle center of, the thread rotating gear ring 505 is movably sleeved inside the upper end and the lower end of the fixed shell 501, the front side of the thread rotating gear ring 505 is in threaded connection with the moving block 506, the moving block 506 is fixedly connected with the locking arc-shaped block 508 through the inner end and the outer end, the left side of the moving block 506 is fixedly provided with a limiting block 507, and the servo motor 502 is electrically connected with the central control system.
The stopper 507 activity is cup jointed inside fixed block 601, and fixed block 601 right side and retainer plate 602 fixed connection, retainer plate 602 activity cup joint inside both ends about fixed shell 501.
When the device is used, the servo motor 502 is started to drive the rotating gear 503 to rotate, the transmission gear 504 is driven to rotate, the rotating shaft 509 is driven to rotate, the rotating bevel gear 510 is driven to rotate, the threaded rotating gear ring 505 is driven to rotate, and the moving block 506 is driven to move along a threaded groove in the threaded rotating gear ring 505, so that the locking arc block 508 moves inwards, the inner diameter of the pipeline is changed, the water supply flow and the water inlet flow can be simultaneously adjusted by simultaneously adjusting the inner diameters of the pipeline of the water outlet pipe 201 and the secondary water return pipe 301 in sequence, the treatment efficiency of the device on circulating water is changed, and the internal circulation adjustment of the device in idling is effectively ensured.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. An automatic control device for efficient energy-saving centralized heating comprises: fixed shell (101) and shell and tube heat exchanger (102) keep warm, its characterized in that still includes: the water inlet tank (104), the water outlet tank (105) and the circulating water tank (106) are fixedly arranged on the left side and the right side of the inner front end of the heat-insulating fixed shell (101), the circulating water tank (106) is fixedly arranged on the rear end of the inner part of the heat-insulating fixed shell (101), connecting holes (107) are formed in the middle parts of the front sides of the water inlet tank (104) and the water outlet tank (105), the shell-and-tube heat exchanger (102) is fixedly arranged on the inner side of the heat-insulating fixed shell (101), the rear end of the water inlet tank (104) is fixedly connected with a circulating water inlet hole of the shell-and-tube heat exchanger (102) through a circulating hot water inlet pipe (108), the circulating water outlet hole of the shell-and-tube heat exchanger (102) is fixedly connected with the circulating water tank (106) through a circulating hot water outlet pipe (109), and the heat exchange water inlet hole of the shell-and, the heat exchange water outlet of the shell and tube heat exchanger (102) is fixedly connected with a water inlet tank (104) and a water outlet tank (105) through an automatic adjusting mechanism, the rear end of the water inlet tank (104) is fixedly connected with a primary water outlet mechanism, and the front end of a circulating water tank (106) is fixedly connected with a circulating water inlet mechanism.
2. An automatic control device for high-efficiency energy-saving central heating according to claim 1, characterized in that: the primary water outlet mechanism comprises: primary water outlet pipe (201) and many interfaces outlet pipe (202), primary water outlet pipe (201) and water inlet tank (104) rear side fixed connection, primary water outlet pipe (201) exit and pipeline adjustment mechanism fixed connection, pipeline adjustment mechanism and many interfaces outlet pipe (202) fixed connection, many interfaces outlet pipe (202) exit and fixed shell (101) fixed connection that keeps warm.
3. An automatic control device for high-efficiency energy-saving central heating according to claim 1, characterized in that: the circulation mechanism of intaking includes: secondary wet return (301) and multi-interface inlet tube (302), secondary wet return (301) exit and circulating water tank (106) front side fixed connection, secondary wet return (301) import department and pipeline adjustment mechanism fixed connection, pipeline adjustment mechanism and multi-interface inlet tube (302) water inlet fixed connection, multi-interface inlet tube (302) water outlet department and heat preservation fixed shell (101) fixed connection.
4. An energy-efficient central heating automation control device as claimed in claim 3, characterised in that: the automatic adjustment mechanism includes: the automatic water-saving device comprises a secondary circulation water outlet pipe (401), an automatic temperature control valve (402), a secondary circulation water outlet pipe (403) and a secondary circulation recovery pipe (404), wherein a heat exchange water outlet hole of the shell and tube heat exchanger (102) is fixedly connected with a water inlet of the automatic temperature control valve (402) through the secondary circulation water outlet pipe (401), the upper end of the automatic temperature control valve (402) is fixedly connected with the upper end of the secondary circulation recovery pipe (404), and the middle part of the automatic temperature control valve (402) is fixedly connected with a water outlet box (105) through the secondary circulation water outlet pipe (403).
5. An energy-efficient central heating automation control device as claimed in claim 3, characterised in that: the pipeline adjustment mechanism includes: the water-saving device comprises a fixed shell (501), a servo motor (502), a rotating gear (503), a transmission gear (504), a threaded rotating gear ring (505), a moving block (506), a limiting block (507), a locking arc-shaped block (508), a rotating shaft (509) and a rotating bevel gear (510), wherein an outlet of a primary water outlet pipe (201) and a water inlet of a multi-interface water inlet pipe (302) are fixedly connected with one side of the upper end and the lower end of the fixed shell (501), the other side of the upper end and the lower end of the fixed shell (501) is fixedly connected with a multi-interface water outlet pipe (202) and an inlet of a secondary water return pipe (301), the servo motor (502) is fixedly installed at the middle end in the fixed shell (501), the front end of a main shaft of the servo motor (502) is fixedly connected with the axis of the rotating gear (503), the upper side and the lower side of the rotating gear (503), the utility model discloses a well control system, including axis of rotation (509), rotation axis (509) lean on outer one end and rotate helical gear (510) fixed connection, it is connected with screw thread rotation gear circle (505) meshing to rotate helical gear (510), screw thread rotation gear circle (505) activity cup joints inside both ends about fixed shell (501), screw thread rotation gear circle (505) front side and movable block (506) threaded connection, movable block (506) lean on interior one end and lock arc piece (508) and lean on outer one end fixed connection, movable block (506) left side fixed mounting has stopper (507), servo motor (502) and center control system electric connection.
6. An energy-efficient central heating automation control device as claimed in claim 5, wherein: the limiting block (507) is movably sleeved inside the fixing block (601), the right side of the fixing block (601) is fixedly connected with the fixing ring (602), and the fixing ring (602) is movably sleeved inside the upper end and the lower end of the fixing shell (501).
7. An energy-efficient central heating automation control device as claimed in claim 2, characterised in that: and pressure pumps are fixedly mounted on the secondary circulation water inlet pipe (103), the circulation hot water inlet pipe (108) and the primary water outlet pipe (201), and are electrically connected with the central control system.
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| CN104848295A (en) * | 2014-10-28 | 2015-08-19 | 青岛万力科技有限公司 | Self-adaption intelligent heat exchange station |
| CN204730470U (en) * | 2015-05-22 | 2015-10-28 | 广州豪特电器设备有限公司 | A kind of hot water supply system |
| CN205717513U (en) * | 2016-03-08 | 2016-11-23 | 浙江凯姆热能设备有限公司 | The indoor temperature controlling machine of domestic hot-water is provided |
| CN205939652U (en) * | 2016-08-24 | 2017-02-08 | 中山市卡洛力热能科技有限公司 | Dual -purpose type water heater of bushing type heating bathing |
| CN106839064A (en) * | 2017-03-25 | 2017-06-13 | 王彤宇 | Heat energy water circulation system |
| CN207279790U (en) * | 2017-07-05 | 2018-04-27 | 天津滨海新区大港长江散热器有限公司 | A kind of dual circuit heating heat radiator with barrier net |
| CN207006324U (en) * | 2017-07-13 | 2018-02-13 | 浙江安扬新能源科技有限公司 | A kind of big volume Two-way Cycle heating system |
| CN207515028U (en) * | 2017-10-18 | 2018-06-19 | 中山市恒乐电器有限公司 | A kind of central water heating device integrated for warm domestic hot-water |
| CN207455702U (en) * | 2017-11-27 | 2018-06-05 | 武汉玛格斯科技有限公司 | A kind of hot-water central heating system wall hung gas boiler |
| CN207962828U (en) * | 2017-12-19 | 2018-10-12 | 郑州需求侧能源管理有限公司 | A kind of energy-saving solar heating system |
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