CN105698242A - High-rise direct-connected heating cycle system - Google Patents
High-rise direct-connected heating cycle system Download PDFInfo
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- CN105698242A CN105698242A CN201610155303.XA CN201610155303A CN105698242A CN 105698242 A CN105698242 A CN 105698242A CN 201610155303 A CN201610155303 A CN 201610155303A CN 105698242 A CN105698242 A CN 105698242A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 230000008859 change Effects 0.000 claims description 40
- 230000017525 heat dissipation Effects 0.000 claims description 17
- 230000017531 blood circulation Effects 0.000 claims description 14
- 230000003068 static effect Effects 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 4
- 238000005381 potential energy Methods 0.000 claims description 4
- 238000009834 vaporization Methods 0.000 claims description 4
- 230000008016 vaporization Effects 0.000 claims description 4
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract 1
- 231100000817 safety factor Toxicity 0.000 abstract 1
- 239000008400 supply water Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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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
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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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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- 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
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
A high-rise direct-connected supply heating cycle system for a heating system comprises a high-area water supply pipe, a high-area radiating device and a high-area water return pipe. A filter, a thermometer, a pressure gauge, a variable-speed pressurized circulating water pump, a standby variable-speed pressurized circulating water pump, a pressure guiding pipe, check valves, a secondary pressurized circulating water pump, a flowmeter and a pressure sensor are mounted on the high-area water return pipe. A by-pass pipe is mounted between the high-area water supply pipe and the high-area water return pipe. The check valves are mounted on the by-pass pipe. An exhaust valve is mounted at the top of the high-area radiating device. Hydro-generators, an electric control valve, a barrier, a constant flow control valve, an expansion tank, a safety valve, a drain tank, the thermometer and the pressure gage are mounted on the high-area water return pipe. Compared with the prior art, the high-rise direct-connected heating cycle system has the advantages that energy is utilized more reasonably and conveniently, the control technology is more reasonable, the safety factors are higher, and the practicability of the whole system is higher.
Description
Technical field
The present invention relates to a kind of high-rise direct-connected heating cycle system for fluid regulation and control。
Background technology
In the system that central heating (cold) etc. needs fluid to carry, need to consider depth of building, according to system running pressure, it is designed to the section cyclic system of different pressures grade, such as high, in, low three section cyclic systems, if not carrying out split plot design at the beginning of the design of central heating (cold) source, the top layer of this region tall buildings will cannot ensure heat supply (cold) effect owing to pressure of supply water is not enough, need to be separately provided pressurization cycle device, ensure the pressure of supply water demand of skyscraper top layer, simultaneously need to eliminate the high static pressure of high district backwater, and reclaim high district backwater potential energy, prevent low district backwater superpressure。In order to realize above-mentioned functions, existing patented technology is " a kind of high-rise straight-connection heating apparatus ", CN201420123043.4, its operation principle is: is reduced pressure by the hydraulic turbine by high district backwater and is converted into kinetic energy, it is delivered directly to one-level pressurization cycle pump by tumbler, water supply after the pressurization of one-level pressurization cycle pump, by two stage speed change pressurization cycle pump pressure-increasing unit again to high district circulation line, meets the pressure of supply water demand of skyscraper top layer。The shortcoming of this technology is:1. the rotating speed of the hydraulic turbine can fluctuate in actual applications, affects the rotating speed of one-level pressurization cycle, causes whole circulatory system pressure, instability of flow, again affects the rotating speed of the hydraulic turbine, causes that systems stay shakes；2. the machine driving heat exchanging stage space between the hydraulic turbine and one-level pressurization cycle pump requires higher, it is necessary to individually customize, if supplying water return pipeline spacing excessive or being separated by other equipment, then machine driving is difficult to carry out；3. system lacks dynamic flow control device, and two stage speed change pressurization cycle water pump can change system circular flow when stable high-floor feedwater pressure, causes dynamic state hydraulic disorder, causes the fluctuation of heating load, also other users of the unified heat supply network of impact；4. block device lacks protection device, once block device is malfunctioning, directly results in low district backwater superpressure, affects whole blood circulation。
Summary of the invention
Can the device kind of drive be unreasonable, flow system flow can not the problem of dynamic regulation in order to overcome existing high-rise direct-connected heating cycle system to return, it is an object of the invention to provide a kind of rational in infrastructure, easy to operate, high-rise direct-connected heating cycle system that exploitativeness is higher, adopt hydrogenerator that high district backwater potential energy is converted directly into electric energy, drive two-stage supercharging circulating pump, constant flow control valve is adopted to control high district blood circulation flow, adopting block device, expansion drum, relief valve to prevent low district backwater superpressure, the present invention is more suitable for China's central heating (cold) system。
This invention address that what its technical problem was realized in:
High-rise direct-connected heating cycle system includes: high district feed pipe (1), high district heat dissipation equipment (12), high district feed pipe (1) is upper installs: filter (2), thermometer (3), Pressure gauge (4), speed change pressurization cycle water pump (5), standby speed change pressurization cycle water pump (6), connecting pipe (17), check-valves (7), two-stage supercharging water circulating pump (8), effusion meter (9), pressure transducer (10), bypass pipe (13) is installed between high district feed pipe (1) and high district return pipe (22), bypass pipe (13) is installed check-valves (7) high district heat dissipation equipment (12) highest point air bleeding valve (11) is installed, high district return pipe (22) installs hydrogenerator (14), electric control valve (15), block device (18), constant flow control valve (16), expansion drum (19), relief valve (21), sluicing pond (20), thermometer (3), Pressure gauge (4)。When system is run, consumer heat inlet supplies water by speed change pressurization cycle water pump (5) and two-stage supercharging water circulating pump (8) pressure-increasing unit to high district heat dissipation equipment (12), prevent high district top layer pipeline and heat dissipation equipment from vaporization and turned letter occurring, high district backwater is reduced pressure by hydrogenerator (14), high district circular flow is controlled by constant flow control valve (16), high district backwater flows to consumer heat inlet return pipe by block device (18), relief valve (21), expansion drum (19), prevent low district blood circulation superpressure, ensure that high district heat dissipation equipment is properly functioning simultaneously。
High district return pipe (22) is without arranging air relief valve, the high-pressure static pressure potential energy of high district backwater is eliminated by the hydrogenerator (14) being arranged in high district return pipe (22), and generate electricity, hydrogenerator can be mixed-flow, axial-flow type, diagonal flow type, tubular, hydrogenerator (14) can multiple stage in parallel use, hydrogenerator is furnished with stable-pressure device, can drive installation two-stage supercharging water circulating pump (8) in high district feed pipe (1), at flow system flow, two-stage supercharging water circulating pump (8) stabilization of speed can be kept when pressure change, two-stage supercharging water circulating pump (8) is by the recirculated water pressure-increasing unit of suction inlet height to top layer, ensure top-level cycle water pressure, prevent vaporization and turned letter, hydrogenerator (14) can also provide electric energy for other electrical equipments in standing。
Speed change pressurization cycle water pump (5) metered flow and lift meet flow and the high district top layer pressure demand of high-rise direct-connected heating cycle system, speed change pressurization cycle pump (5) receives pressure transducer (10) signal, pass through automatic speed regulation, it is possible to control the force value of high district top layer。
The driving power supply of two-stage supercharging water circulating pump (8) is from municipal administration power supply and hydrogenerator (14), and can switch at any time, two-stage supercharging water circulating pump (8) can be arranged on booster station, the floor in high district heat dissipation equipment (12) can also be disposed proximate to, if placed at the floor close to high district heat dissipation equipment (12), two-stage supercharging water circulating pump (8) metered flow and lift need to meet circular flow and the high district top layer pressure demand of self suction inlet paramount district this part pipeline of top layer。
Installing constant flow control valve (16) in high district return pipe (22), application self-operated type principle controls flow system flow, when system produces pressure oscillation or speed change pressurization cycle water pump adjusts rotating speed, keeps blood circulation flow constant。
High district return pipe (22) installs block device (18), block device (18) is furnished with connecting pipe (17), pipeline UNICOM between connecting pipe (17) and speed change pressurization cycle water pump (5) outlet and check-valves (7), gather speed change pressurization cycle water pump (5) outlet pressure, block device (18) is internal is provided with bascule, bascule is connected with turning off flap, bascule gathers speed change pressurization cycle water pump (5) outlet pressure and block device (18) inlet pressure, under the active force of adjustable spring, keep balance, shutoff flap is made to be maintained at open position, when speed change pressurization cycle water pump (5) due to fault out of service time, the check-valves that speed change pressurization cycle water pump (5) exports can shield the static pressure that high district supplies water, speed change pressurization cycle water pump (5) outlet pressure is caused to reduce, the connecting pipe (17) of block device (18) gathers pressure to be reduced, the bascule of block device (18) inside is by force unbalance, make shutoff flap action to closed position, fast shut-off height district backwater, the high district backwater preventing high static pressure enters low district water return pipeline。
High district return pipe (22) installs expansion drum (19), the downstream return pipe of expansion drum (19) installs relief valve (21), relief valve (21) is connected with sluicing pond (20), when block device (18) breaks down and is not normally functioning, the high district backwater of high static pressure will be introduced into expansion drum (19), the high district backwater of high static pressure is cushioned by expansion drum (19), reduced pressure treatment, if high district backwater exceedes safety valve setting force value, relief valve (21) will be opened, high district backwater is entered sluicing pond (20), until high district pressure of return water is lower than relief valve (21) setup pressure value, the high district backwater preventing high static pressure enters low district water return pipeline。
High district heat dissipation equipment (12) can be radiator, floor heating, fan coil。
The present invention can be applied in the fluid control systems in the fields such as central heating, central air-conditioning, tap water, natural gas and oil。
Below in conjunction with drawings and Examples, the present invention is further described。
Accompanying drawing explanation:
Fig. 1 is the structural representation of one embodiment of the invention；
Fig. 2 is the structural representation of block device
In figure: 1. high district feed pipe, 2. filter, 3. thermometer, 4. Pressure gauge, 5. speed change pressurization cycle water pump, 6. standby pressurization cycle water pump, 7. check-valves, 8. two-stage supercharging water circulating pump, 9. effusion meter, 10. pressure transducer, 11. air bleeding valves, 12. high district heat dissipation equipments, 13. bypass pipe, 14. hydrogenerators, 15. electric control valves, 16. constant flow control valves, 17. connecting pipe, 18. block devices, 19. expansion drums, 20. sluicing pond, 21. relief valve, 22. high district return pipes。
Detailed description of the invention
In Fig. 1, municipal administration heat distribution pipeline is divided into two set blood circulation after entering consumer heat inlet, low district blood circulation and high district blood circulation, the operational process of high district blood circulation is: set the aperture of constant flow control valve (16), reach the metered flow value needed for high district blood circulation, open speed change pressurization cycle water pump (5) and two-stage supercharging water circulating pump (8) simultaneously, time two-stage supercharging water circulating pump (8) reaches rated speed, automatic speed governing device can regulate the rotating speed of speed change pressurization cycle water pump (5), until the pressure transducer (10) being arranged on high district top layer measures pressure reaches top layer desirable pressure value, and stablize top layer desirable pressure value by being automatically adjusted speed change pressurization cycle water pump (5) rotating speed。
High district backwater drives hydrogenerator (14) to reach stabilized (steady-state) speed, hydrogenerator can export the electric energy of rated power by stable-pressure device, hydrogenerator is greatly reduced high district pressure of return water, unnecessary pressure is consumed by constant flow control valve (16), Shi Gao district return pipe (22) force value is identical with low district return pipe force value, and system reaches steady operational status。
After high district blood circulation is stable, switch to hydrogenerator (14) to power the mains-supplied of two-stage supercharging water circulating pump (8), reduce the high-rise direct-connected total power consumption of heating cycle system。
When system needs variable-flow operation, the flow first setting constant flow control valve (16) reaches target flow value, hydrogenerator (14) opens the number of units of coupling according to target flow value size, the generated output that output is corresponding, number of units or generated output that two-stage supercharging water circulating pump (8) runs according to hydrogenerator (14) adjust rotating speed automatically, make two-stage supercharging water circulating pump (8) output generated output less than hydrogenerator (14), speed change pressurization cycle water pump (5) stablizes high district top layer pressure by pressure transducer (10) and automatic speed governing device。
When speed change pressurization cycle water pump (5) breaks down out of service, check-valves (7) cuts out, pressure between speed change pressurization cycle water pump (5) outlet and check-valves (7) is greatly reduced, approximate consumer heat inlet pressure of supply water value, what gather under speed change pressurization cycle water pump (5) normal operation due to connecting pipe (17) is high pressure, when speed change pressurization cycle water pump (5) breaks down out of service, what connecting pipe (17) gathered is low pressure, the flap making block device (18) internal produces out-of-balance force, flap will be closed under the active force of spring force, prevent high district backwater from flowing into low district return pipe。When speed change pressurization cycle water pump (5) is fixed a breakdown and is continued to run with or switch to standby speed change pressurization cycle water pump (6) to run, connecting pipe (17) gathers high pressure, overcome block device (18) contained spring elastic force so that block device (18) internal flap is opened, and high district blood circulation is properly functioning。
When block device (18) breaks down, if speed change pressurization cycle water pump (5) breaks down out of service, block device (18) will be unable to block the high pressure backwater in high district, high pressure backwater will enter expansion drum (19) decompression, if still superpressure, then relief valve (21) is opened, superpressure water in high district return pipe (22) is entered sluicing pond (20), until high district pressure of return water is lower than safety valve setting force value, prevent high pressure backwater from flowing into low district return pipe, ensure that low district blood circulation is properly functioning。
Claims (8)
1. one kind is used for high-rise direct-connected heating cycle system, it is characterized in that: high-rise direct-connected heating cycle system includes: high district feed pipe (1), high district heat dissipation equipment (12), high district return pipe (22), high district feed pipe (1) is upper installs: filter (2), thermometer (3), Pressure gauge (4), speed change pressurization cycle water pump (5), standby speed change pressurization cycle water pump (6), connecting pipe (17), check-valves (7), two-stage supercharging water circulating pump (8), effusion meter (9), pressure transducer (10), bypass pipe (13) is installed between high district feed pipe (1) and high district return pipe (22), bypass pipe (13) is installed check-valves (7) high district heat dissipation equipment (12) highest point air bleeding valve (11) is installed, high district return pipe (22) installs hydrogenerator (14), electric control valve (15), block device (18), constant flow control valve (16), expansion drum (19), relief valve (21), sluicing pond (20), thermometer (3), Pressure gauge (4)；When system is run, consumer heat inlet supplies water by speed change pressurization cycle water pump (5) and two-stage supercharging water circulating pump (8) pressure-increasing unit to high district heat dissipation equipment (12), prevent high district top layer pipeline and heat dissipation equipment from vaporization and turned letter occurring, high district backwater is reduced pressure by hydrogenerator (14), high district circular flow is controlled by constant flow control valve (16), high district backwater flows to consumer heat inlet return pipe by block device (18), relief valve (21), expansion drum (19), prevent low district blood circulation superpressure, ensure that high district heat dissipation equipment is properly functioning simultaneously。
2. high-rise direct-connected heating cycle system according to claim 1, it is characterized in that: high district return pipe (22) is without arranging air relief valve, the high-pressure static pressure potential energy of high district backwater is eliminated by the hydrogenerator (14) being arranged in high district return pipe (22), and generate electricity, hydrogenerator can be mixed-flow, axial-flow type, diagonal flow type, tubular, hydrogenerator (14) can select multiple stage in parallel to run according to high district recirculated water variable-flow operation situation, ensure the flow that every hydrogenerator (14) runs, pressure reduction, rotating speed reaches rated value, hydrogenerator (14) is furnished with stable-pressure device, can drive installation two-stage supercharging water circulating pump (8) in high district feed pipe (1), two-stage supercharging water circulating pump (8) is by the recirculated water pressure-increasing unit of suction inlet height to top layer, ensure top-level cycle water pressure, prevent vaporization and turned letter, hydrogenerator (14) can also provide electric energy for interior electrical equipment of standing。
3. high-rise direct-connected heating cycle system according to claim 1, it is characterized in that: speed change pressurization cycle water pump (5) metered flow and lift meet flow and the high district top layer pressure demand of high-rise direct-connected heating cycle system, speed change pressurization cycle pump (5) receives pressure transducer (10) signal, pass through automatic speed regulation, it is possible to control the force value of high district top layer。
4. high-rise direct-connected heating cycle system according to claim 1, it is characterized in that: the driving power supply of two-stage supercharging water circulating pump (8) is from municipal administration power supply and hydrogenerator (14), and can switch at any time, two-stage supercharging water circulating pump (8) is furnished with automatic speed governing device, the quantity run according to hydrogenerator (14) or generating general power automatically set the rotating speed of two-stage supercharging water circulating pump (8), two-stage supercharging water circulating pump (8) can be arranged on booster station, the floor in high district heat dissipation equipment (12) can also be disposed proximate to, if placed at the floor close to high district heat dissipation equipment (12), two-stage supercharging water circulating pump (8) metered flow and lift need to meet circular flow and the high district top layer pressure demand of self suction inlet paramount district this part pipeline of top layer。
5. high-rise direct-connected heating cycle system according to claim 1, it is characterized in that: high district return pipe (22) installs constant flow control valve (16), application self-operated type principle controls flow system flow, when system produces pressure oscillation or speed change pressurization cycle water pump adjusts rotating speed, keep blood circulation flow constant。
6. high-rise direct-connected heating cycle system according to claim 1, it is characterized in that: high district return pipe (22) installs block device (18), block device (18) is furnished with connecting pipe (17), pipeline UNICOM between connecting pipe (17) and speed change pressurization cycle water pump (5) outlet and check-valves (7), gather speed change pressurization cycle water pump (5) outlet pressure, block device (18) is internal is provided with bascule, bascule is connected with turning off flap, bascule gathers speed change pressurization cycle water pump (5) outlet pressure and block device (18) inlet pressure, under the active force of adjustable spring, keep balance, shutoff flap is made to be maintained at open position, when speed change pressurization cycle water pump (5) due to fault out of service time, the check-valves that speed change pressurization cycle water pump (5) exports can shield the static pressure that high district supplies water, speed change pressurization cycle water pump (5) outlet pressure is greatly reduced, the connecting pipe (17) of block device (18) gathers pressure to be reduced, the bascule of block device (18) inside is by force unbalance, make shutoff flap action to closed position, fast shut-off height district backwater, the high district backwater preventing high static pressure enters low district water return pipeline。
7. high-rise direct-connected heating cycle system according to claim 1, it is characterized in that: high district return pipe (22) installs expansion drum (19), the downstream return pipe of expansion drum (19) installs relief valve (21), relief valve (21) is connected with sluicing pond (20), when block device (18) breaks down and is not normally functioning, the high district backwater of high static pressure will be introduced into expansion drum (19), the high district backwater of high static pressure is cushioned by expansion drum (19), reduced pressure treatment, if high district backwater exceedes safety valve setting force value, relief valve (21) will be opened, high district backwater is entered sluicing pond (20), until high district pressure of return water is lower than relief valve (21) setup pressure value, the high district backwater preventing high static pressure enters low district water return pipeline。
8. high-zone directly-connected heating cycle system according to claim 1, it is characterised in that: high district heat dissipation equipment (12) can be radiator, floor heating, fan coil。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610155303.XA CN105698242A (en) | 2016-03-18 | 2016-03-18 | High-rise direct-connected heating cycle system |
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| CN201610155303.XA CN105698242A (en) | 2016-03-18 | 2016-03-18 | High-rise direct-connected heating cycle system |
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| CN105698242A true CN105698242A (en) | 2016-06-22 |
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| CN201610155303.XA Pending CN105698242A (en) | 2016-03-18 | 2016-03-18 | High-rise direct-connected heating cycle system |
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Cited By (6)
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| CN107555706A (en) * | 2016-07-01 | 2018-01-09 | 中国石油化工股份有限公司 | A kind of device and method of oilfield sewage biochemical treatment temperature control |
| CN109469942A (en) * | 2018-11-06 | 2019-03-15 | 西安市建筑设计研究院有限公司 | A kind of classification multifunctional pump user unit low applied to building topography |
| CN110686307A (en) * | 2019-09-25 | 2020-01-14 | 石河子大学 | Time-sharing heating system capable of avoiding gas collection |
| CN110887103A (en) * | 2018-09-07 | 2020-03-17 | 宁波方太厨具有限公司 | Heating loop fault judgment method |
| CN111765508A (en) * | 2020-06-28 | 2020-10-13 | 柳林县靖德供热设备有限公司 | Heat supply pressurizing unit |
| CN112169237A (en) * | 2020-10-20 | 2021-01-05 | 山东朗晖石油化学股份有限公司 | Fire water system salvagees emptying devices |
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| CN110887103A (en) * | 2018-09-07 | 2020-03-17 | 宁波方太厨具有限公司 | Heating loop fault judgment method |
| CN110887103B (en) * | 2018-09-07 | 2021-02-26 | 宁波方太厨具有限公司 | Heating loop fault judgment method |
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Application publication date: 20160622 |