CN203586373U - Solar centralized water heating system - Google Patents

Solar centralized water heating system Download PDF

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Publication number
CN203586373U
CN203586373U CN201320755861.1U CN201320755861U CN203586373U CN 203586373 U CN203586373 U CN 203586373U CN 201320755861 U CN201320755861 U CN 201320755861U CN 203586373 U CN203586373 U CN 203586373U
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China
Prior art keywords
water
water tank
heating
pump
circulating
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CN201320755861.1U
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Chinese (zh)
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高秀峰
刘佳
贺国凌
李震
李云
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Suzhou Academy of Xian Jiaotong University
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Suzhou Academy of Xian Jiaotong University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/20Solar thermal
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/70Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies

Abstract

The utility model discloses a solar centralized water heating system. The solar centralized water heating system comprises a solar thermal collector array, a heat pump unit, an electric auxiliary heater, a water tank, a circulating pump, an electromagnetic valve and the like. The heat pump unit in the system has two working modes including direct-heating water production and circular heating, and is correspondingly provided with two water inlets and a water outlet. Circular heating circuits are formed by the solar thermal collector array and the water tank and by the heat pump unit and the water tank respectively. Direct-heating water production routes are formed by the solar thermal collector array and a tap water supply pipeline and by the heat pump unit and the tap water supply pipeline respectively. The externally electric auxiliary heater and the water tank form a circular heating circuit. According to the construction of system circuits, system components are controlled based on a comprehensive optimization strategy, the direct-heating water production comes first, the circular heating ranks second, and the system only has to be provided with one water tank; the system collects solar energy preferentially, heat-pump heat production is provided on the condition of insufficient solar energy, and the auxiliary heater is started on the condition of severe weather or high water consumption, so that electric-energy consumption is reduced to the greatest extent, system composition is simplified to the greatest extent, and all-weather hot water supply is guaranteed.

Description

A kind of solar energy central hot water system
Technical field
the utility model relates to a kind of project scale solar energy utilization technique field, is specifically related to a kind of heating system with multi-eat sources system take solar energy as master of optimization.
Background technology
along with the day by day minimizing of traditional fossil energies such as oil, coal, natural gas, and use the increasingly severe environmental problem that these fossil energies bring, develop all kinds of clean energy resourcies and renewable energy utilization technology has been subject to increasing attention.Wherein, use the solar energy heat collector of scale on building, for building centralizedly supply domestic hot-water is a kind of effectively renewable energy utilization means, and have good environmental-protecting performance, therefore, its development and application is very fast in recent years.Owing to being limited by climatic factor, solar energy can not be supplied with continually and steadily, therefore in solar energy central hot water supply system, be often provided with the auxiliary heat production devices such as source pump, electric heating device, thereby form heating system with multi-eat sources system, especially solar heat pump is concentrated hot-water heating system, and development in recent years application is very fast.The various ways that is configured with take solar energy as main heating system with multi-eat sources system, different System Construction flow processs has determined the difference of system operating mode and control strategy, has also determined the height difference of system synthesis Energy Efficiency Ratio; Under homoclime condition and service condition, construct rational system, its average annual comprehensive energy efficiency ratio may be up to 6~10, and construct irrational system, and its average annual comprehensive energy efficiency ratio may only have 3~5.Therefore the different system energy consumption significant difference of operation throughout the year, system cost also has notable difference.
this class can be divided into two large classes substantially take solar energy as hot water production and the method for supplying of main heating system with multi-eat sources system: a class is that cold water is filled into water tank, then by solar thermal collector, source pump, electric heating device, water tank is carried out to circulating-heating, until reach the coolant-temperature gage of using of user's requirement, this system is called circulating-heating water production system; This System Construction scheme mainly contains two limitations greatly: the one, and water tank fills into heat temperature raising stage after cold water can not hot-water supply, this time period often needs several even tens hours, so this system can not be applicable to require the occasion (as hotel) of 24 hours hot-water supplies, can only be applicable to user's (as collective bathroom of house, timing open etc.) of the section of fixing time water; Multiple water tanks are set, or adopt some special operational modes may realize water supply in 24 hours, but will cause system complex and energy consumption index to rise.Than circulating-heating water production system, another kind of system formation scheme is once flow through solar thermal collector or source pump of cold water, just can be elevated to that user requires with coolant-temperature gage, fill into water tank stand-by, corresponding system is called directly-heated water production system; Solar thermal collector, source pump, electric heating device and the water tank of this system also form closed circuit, when the water in water tank reduces because of heat radiation temperature, utilize the closed circuit forming, then the water circulation in water tank is heated to desired temperature; Directly-heated water production system only just can be realized 24 hours hot-water supplies with a water tank, and system synthesis Energy Efficiency Ratio is higher.
at present actual use take solar energy as main heating system with multi-eat sources system mostly is circulating-heating water production system, there are more above-described application limitations.Often complex structure of the disclosed directly-heated water production system of some practical application example or document, causes system Construction cost and maintenance management high expensive; Unreasonable system flow has determined that its mode of operation is also unreasonable, can not reach the target that maximally utilises solar energy, raising source pump Energy Efficiency Ratio, the system heat loss that reduces, raising system synthesis Energy Efficiency Ratio, the long-term operation energy consumption of reduction system.
Utility model content
the utility model object is: provide a kind of simple in structure, can directly-heated produce solar energy that water, operational efficiency are high and the concentrated hot-water heating system of heat pump and electric heater associated working, for building domestic hot-water's centralized production and supply.
the technical solution of the utility model is:
a kind of solar energy central hot water system, comprise solar thermal collector array and water tank, the first circulating outlet on water tank, heat collector circulating pump, solar thermal collector array loop back the mouth of a river with first on water tank and are connected successively by pipeline, and water tank is connected with hot water water pipe network; Between described heat collector circulating pump and solar thermal collector array, be provided with check valve, between described check valve and solar thermal collector array, by top water solenoid valve, be connected with tap water supply pipeline.
preferably, described system also comprises source pump, and described source pump is provided with circulating-heating water inlet, directly-heated produces water water inlet and delivery port; On water tank, offer the second circulating outlet, second and loop back the mouth of a river, the second circulating outlet is connected by pipeline successively with unit circulating pump, circulating-heating water inlet, and delivery port and second loops back mouth of a river pipeline and is connected; Directly-heated produces water water inlet and is connected with tap water supply pipeline; Water tank is connected with hot water water pipe network.
preferably, offer the 3rd circulating outlet and the 3rd and loop back the mouth of a river on described water tank, the 3rd circulating outlet, electric auxiliary hot recycle pump, electric heating device, the 3rd loop back the mouth of a river and connect in turn by pipeline.
preferably, described solar thermal collector array arranges heat collector top water temperature sensor along the port of export of the end heat collector of water (flow) direction; In described water tank, be provided with Water in Water Tank temperature sensor and cistern water level sensor; Described each sensor is connected with system controller part.
preferably, between the circulating-heating water inlet of described source pump and unit circulating pump, near-thermal pump assembly place is provided with heat pump cycle pipeline temperature sensor and the first water flow switch; Between described electric heating device and electric auxiliary hot recycle pump, be provided with electric auxiliary heating circulation line temperature sensor and the second water flow switch; On tap water supply pipeline in described system, be provided with antifreeze electric-heating belt; Described each sensor is connected with system controller part.
preferably, the end of described hot water water pipe network loops back the mouth of a river with the 5th of water tank and is connected, described solar thermal collector array inlet duct is provided with heat collector bottom cooling-water temperature sensor, the end of hot water water pipe network is provided with return pipe cooling-water temperature sensor, described tap water supply pipeline is provided with cold water pipes temperature sensor, and described each sensor is connected with system controller part.
preferably, the peak of described water tank is provided with the anti-overflow protection switch being connected with system controller part, and the bottom of water tank is provided with high temperature protection drain solenoid valve, and the 4th of water tank loops back the mouth of a river and is connected with tap water supply pipeline by fast repairing water solenoid valve.
preferably, described source pump and water supply pipe junction are provided with unit cold water water supply booster pump.
preferably, the front end of described hot water water pipe network water (flow) direction is provided with water supply booster pump, is provided with water pipe network backwater magnetic valve between hot water water pipe network and water tank.
preferably, the end of described hot water water pipe network is provided with user's pipeline return circulating pump.
the above solar thermal collector can be vacuum tube collector, flat plate collector, heat pipe collector etc.; Described source pump is air source heat pump, water resource heat pump etc.; Described electric heating device is external or built-in heater.
in the utility model, the first circulating outlet, heat collector circulating pump, check valve, solar thermal collector array, first loop back the mouth of a river, water tank forms solar energy circulating-heating loop; Solar thermal collector array, top water solenoid valve and tap water supply pipeline form solar energy directly-heated and produce water route line; The second circulating outlet, unit circulating pump, source pump, second loop back the mouth of a river and water tank forms heat pump cycle heating circuit; Source pump and tap water supply pipeline form heat pump directly-heated and produce water route line; The 3rd circulating outlet, electric auxiliary hot recycle pump, electric heating device, the 3rd loop back the mouth of a river and water tank forms electric heating device circulating-heating loop.
the utility model has the advantages that:
one, the solar energy heat production unit in system and heat pump heat production unit all produce water mode as groundwork pattern take directly-heated, be cold water once flow through that heat collector or source pump just can be heated to that user sets with coolant-temperature gage (approximately 50~60 ℃), enter water tank storage, therefore system only need to arrange a water tank, just can realize 24 hours hot-water supplies, reduced equipment investment, also simplify System Construction and pipeline flow process, thereby reduced the initial cost of system Construction; System Construction is simple, simplify system controller part control logic, reduced the configuration quantity of various kinds of sensors, improve and control reliability.
two, solar thermal collector produces under aqueous mode at directly-heated, running water once flow through that heat collector is just raised to that user sets with coolant-temperature gage, enter water tank storage, therefore the average operating temperature of heat collector is roughly equivalent to cold water temperature and sets the mean value of using coolant-temperature gage.Adopt the heat collector of circulating-heating work pattern, daytime is in order to realize continuous water supply, generally in water tank, to fill into a small amount of cold water at every turn, make water tank temperature reduce the several years, and then by hydronic pattern, water tank temperature is returned on setting value, and then be blended into recirculation of cold water heating, and going round and beginning again, the heat collector of this mode of operation is approaching working with under coolant-temperature gage of user's setting all the time.Therefore, the heat collector that directly-heated produces water is lower approximately 15 ℃ than the average operating temperature of hydronic heat collector, and the operating temperature of solar thermal collector is lower, and its collecting efficiency is higher.Therefore, the main solar energy heating unit with the work of directly-heated mode in native system, its efficiency that absorbs solar energy is higher than circulating.
three, press directly-heated and produce the source pump of aqueous mode work, running water once flow through that the condenser of source pump is just warmed up to that user sets with coolant-temperature gage, enter water tank storage.By the source pump of circulating-heating work pattern, be first cold water to be put into water tank, and then circulating-heating is to design temperature, recirculated water is flowed through the general temperature rise of source pump at 4~8 ℃ at every turn, circulating heat pump is in the hydronic stage finally, unit inflow temperature is tending towards the coolant-temperature gage of using of user's setting, otherwise water tank temperature can not be heated to setting value.With 15 ℃ of running water temperature, finally producing 50 ℃ of coolant-temperature gages is example, if the intensification of the each circulation of circulating heat pump is 6 ℃, condenser is complete countercurrent flow, the temperature that approaches of condensation process cold-producing medium transformation temperature is 2 ℃, the temperature difference of condensator outlet cold-producing medium and water is 3 ℃, and the condensation process on the kind of refrigeration cycle pressure-enthalpy chart of two kinds of final operating modes of heat pump contrasts as shown in Figure 6.Visible heat pump directly-heated working method is than periodic duty mode, and condensation temperature is low approximately 10 ℃, and degree of supercooling is low approximately 35 ℃.According to the operating characteristic of compression heat pump system, condensation temperature reduction and degree of supercooling increase all can increase substantially Energy Efficiency Ratio and the refrigerating capacity of kind of refrigeration cycle, and compressor power consumption is constant, and therefore systematic energy efficiency ratio and quantity of heat production all increase.Therefore,, under identical compressor configuration condition, in native system, heat pump directly-heated working method can increase substantially Energy Efficiency Ratio and Thermogenesis than periodic duty mode.If weighed to reach the identical condensing pressure upper limit, in native system, the directly-heated of heat pump produces the comparable circulation of aqueous mode and produces the limit of aqueous mode and produce the high 10 ℃ of left and right of coolant-temperature gage, thereby provides higher supply water temperature for user.
four, the solar energy heating unit in system and heat pump heat production unit mainly produce the work pattern of water with directly-heated, therefore can utilize the pressure of running water as power, promoting flow through heat collector or heat pump of cold water enters water tank and completes directly-heated and produce water process, than circulating solar energy heating unit and heat pump heat production unit, saved the power consumption of circulating pump in two closed circuits, further the comprehensive energy efficiency of Hoisting System operation is than approximately 15% left and right.
five, the electric heating device arranging in native system, can be in environment temperature very low and do not have solar radiation extreme weather conditions under, or in the abnormal large situation of user's water consumption, provide auxiliary energy source, guarantee that user does not cut off the water supply.
six, by the rational control strategy of system controller part, the preferential solar energy that also gathers to greatest extent of system, heat pump only just comes into operation when solar energy is not enough to provide the necessary minimum amount of user, electric heater just comes into operation in extreme weather, therefore whole system can reach very high long-term operation comprehensive energy efficiency ratio, and can save weather from damage and supply water for 24 hours.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the utility model is further described:
fig. 1 is the schematic diagram of the utility model embodiment 1;
fig. 2 is the schematic diagram of the utility model embodiment 2;
fig. 3 is the schematic diagram of the utility model embodiment 3;
fig. 4 is the schematic diagram of water tank in the utility model;
fig. 5 is the schematic diagram of source pump in the utility model;
fig. 6 is that heat pump directly-heated produces water and circulating-heating produces under two kinds of working methods of water, the contrast of condenser heat transfer process pressure-enthalpy chart.Wherein: (a) heat pump directly-heated produces water condensation heat transfer process, (b) heat pump cycle heating-condensing heat transfer process.
wherein: 1. solar thermal collector array, 2. heat collector top water temperature sensor, 3. anti-overflow protection switch, 4. water tank, 5. electric heating device circulation line temperature sensor, 6. electric heating device, 7. heat pump cycle pipeline temperature sensor, 8. source pump, 9. unit cold water water supply booster pump, 10. water pipe network backwater magnetic valve, 11. fast repairing water solenoid valves, 12. return pipe cooling-water temperature sensors, 13. antifreeze electric-heating belts, 14. hot water water pipe networks, 15. first water flow switches, 16. second water flow switches, 17. water supply booster pumps, 18. unit circulating pumps, 19. electric auxiliary hot recycle pumps, 20. Water in Water Tank temperature sensors, 21. cistern water level sensors, 22. high temperature protection drain solenoid valves, 23. cold water pipes temperature sensors, 24. heat collector circulating pumps, 25. top water solenoid valves, 26. check valves, 27. heat collector bottom cooling-water temperature sensors, 28. user's pipeline return circulating pumps, 401. first circulating outlets, 402. second circulating outlets, 403. the 3rd circulating outlets, 404. first loop back the mouth of a river, 405. second loop back the mouth of a river, 406. the 3rd loop back the mouth of a river, 407. the 4th loop back the mouth of a river, 408. the 5th loop back the mouth of a river, 801. circulating-heating water inlets, 802. directly-heateds produce water water inlet, 803. delivery port.
The specific embodiment
embodiment:
embodiment 1:
if Fig. 1 is in conjunction with as shown in Fig. 4, Fig. 5, on the first circulating outlet 401 on water tank 4, heat collector circulating pump 24, check valve 26, solar thermal collector array 1, water tank 4 first loops back the mouth of a river 404 and connects successively by pipeline, forms solar energy circulating-heating loop; Pipeline between check valve 26 and solar thermal collector array 1 entrance, is connected with tap water supply pipeline by top water solenoid valve 25, forms solar energy directly-heated and produces water route line; Multiple source pump 8 form heat pump machine cohort, the quantity of source pump 8 can be determined according to actual conditions, source pump 8 itself possesses directly-heated and produces water and two kinds of mode of operations of circulating-heating, should there be mutually a circulating-heating water inlet 801, directly-heated to produce water water inlet 802, a delivery port 803, the second circulating outlet 402 on water tank 4, unit circulating pump 18, circulating-heating water inlet 801, source pump 8, delivery port 803, second loop back the mouth of a river 405 and connect successively by pipeline, form heat pump cycle heating circuit; The directly-heated of source pump 8 produces water water inlet 802 and is connected with tap water supply pipeline, forms heat pump directly-heated and produces water route line; On the 3rd circulating outlet 403 on water tank 4, electric auxiliary circulating pump 19, electric heating device 6, water tank 4 the 3rd loops back the mouth of a river 406 and connects successively by pipeline, forms electric heating device circulating-heating loop.Interior Water in Water Tank temperature sensor 20 and the cistern water level sensor 21 of arranging of water tank 4, Water in Water Tank temperature sensor 20 is measured the water temperature in water tank 4, and cistern water level sensor 21 detects the height of water level in water tank 4; Solar thermal collector array 1 arranges heat collector top water temperature sensor 2, the water temperature at its measure setup place along the port of export of the end heat collector of water (flow) direction; Each above-mentioned sensor and system controller part (as single-chip microcomputer, PLC etc., not shown) connect.
the method of work of the present embodiment is as follows:
one, solar energy directly-heated produces water: when the water yield in water tank 4 is less than full-water level (being defined as 100% water yield), water temperature T 1 in the solar thermal collector array 1 that heat collector top water temperature sensor 2 records be more than or equal to user set water temperature T S1(numerical value adjustable, generally between 50~55 ℃), and when the water tank temperature T3 that Water in Water Tank temperature sensor 20 records is also more than or equal to setting value TS1, top water solenoid valve 25 is opened, cold water enters collector array 1 hot water is wherein headed into water tank 4, until the water temperature T 1 in end heat collector 1 is lower 5 ℃ than setting value TS1, or water tank temperature T3 is less than or equal to TS1-5 ℃, or during water tank full water, top water solenoid valve 25 is closed, thereby realize the water outlet of heat collector constant temperature.
two, solar energy circulating-heating: to be greater than setting value TS2(numerical value adjustable as water temperature T 1 and the difference T1-T3 of water tank 4 temperature T 3 of the end of solar thermal collector array 1, generally be made as 7 ℃) time, heat collector circulating pump 24 is opened, with the slightly low slightly high water of water displacement solar thermal collector array 1 interior temperature of the interior temperature of water tank 4, until that solar thermal collector array 1 and the temperature difference T1-T3 of water tank 4 are less than setting value TS3(numerical value is adjustable, generally be made as 3 ℃) time, heat collector circulating pump 24 cuts out, and stops heat collector circulation.
three, heat pump directly-heated produces water: at a time (as point in afternoons 3); if the water yield in water tank 4 is adjustable lower than the lower limit HS1(numerical value of a certain setting; as 50% water yield); open source pump 8 and carry out directly-heated product water; until that the water yield in water tank 4 reaches the water level higher limit HS2(numerical value in the corresponding moment setting is adjustable; as 70% water yield), shut down.Water level bound setting value HS1, the HS2 of each time point is all default according to the minimum actual used water changes in demand of user rule, as long as the water tank water-holding quantity that is also a certain moment reaches between HS1 and HS2, just can meet the urban water demand of user within coming few hours, and needn't require heat pump to produce too many water, thereby wait for solar energy heat production, save heat pump energy consumption.
four, heat pump cycle heating: any moment, as long as the water temperature T 3 in water tank interior 4 is adjustable lower than a certain setting value TS4(numerical value, generally be made as 45~48 ℃), open the circulating-heating function of source pump 8, water tank 4 is carried out to circulating-heating, until the water temperature T 3 in water tank 4 is elevated to the water temperature T S1 that user sets.
five, water is produced in electric auxiliary thermal cycle: at a time, when the water yield in water tank 4 lower than set water level lower limit HS1 × 0.6 time, electric heating device 6 and circulating pump 19 thereof are opened, water in water tank 4 is carried out to circulating-heating, when water tank temperature T3 temperature is elevated to while being greater than TS1+5 ℃, open heat collector top water solenoid valve 25, the warm water by interior heat collector 1 temperature between cold water temperature and water tank 4 temperature is sent into water tank 4, until water tank temperature T3 drops to lower than TS1, closes top water solenoid valve 25; In this process, electric heating device 6, always in opening, along with constantly carrying out of heating and moisturizing, until the water level in water tank 4 reaches the upper limit set value HS2 in corresponding moment, is closed electric heating device 6 and circulating pump 19 thereof.
embodiment 2:
if Fig. 2 is in conjunction with as shown in Fig. 4, Fig. 5, on the system formation base of embodiment 1, the present embodiment loops back the mouth of a river 407 by the 4th of water tank 4 the and is connected by fast repairing water solenoid valve 11 with water supply pipe, forms the fast repairing water route line of water tank 4; Cistern water level sensor 21 in water tank 4 is used for the height of sensed water level; At the interior peak of water tank 4, an anti-overflow protection switch 3 is set, for cut off all water inlet routes of water tank 4 by system controller part when water tank 4 produces overflow because of abnormal conditions; Water tank bottom is provided with a high temperature protection drain solenoid valve 22, the draining protection during for water tank 4 interior water temperature over-high.Heat collector bottom cooling-water temperature sensor 27 is set on the closed circuit of described solar thermal collector array 1 bottom inlet duct; cold water pipes temperature sensor 23 is set on tap water supply pipeline; on the closed circuit of described source pump 8, nearly unit position arranges heat pump cycle Pipeline Water temperature sensor 7; on the closed circuit of electric heating device 6, nearly heater locations arranges electric heating device circulation line temperature sensor 5; above-mentioned each temperature sensor is connected with system controller part, for the anti-frost protection control of respective line.Antifreeze electric-heating belt 13 is set, for the anti-frost protection of cold water pipes on all cold water pipes of system.On electric heating device closed circuit, source pump closed circuit; after corresponding circulating pump; the first water flow switch 15, the second water flow switch 16 that are provided for respectively interlock protection electric heating device, source pump, water flow switch is connected with system controller part.When tap water supply pressure is lower, at the directly-heated of described source pump 8, produce the unit cold water water supply booster pump 9 that is provided for increasing source pump cold water pressure of supply water on water water inlet cold water pipeline, to guarantee unit intake pressure.The 5th of described water tank 4 loops back the mouth of a river 408 and is connected with the end pipeline of described hot water water pipe network 14, form hot water water pipe network closed circuit, on the end pipeline of described hot water water pipe network 14, be that return pipe front end is provided with the return pipe cooling-water temperature sensor 12 being connected with single-chip microcomputer, for controlling the backwater of hot water water pipe network 14.System is used water supply booster pump 17 to hot water water pipe net 14 hot-water supplies, on the water return pipeline that connects water tank the 5th and loop back the mouth of a river 408 and hot water water pipe network 14 ends, water pipe network backwater magnetic valve 10 is set, for controlling the backwater of water pipe network.
on the basis of the method for work of embodiment 1, the method for work that the present embodiment further increases is as follows:
one, the quick moisturizing of water tank: when the water level in water tank 4 lower than minimum HL(, be equivalent on the first~three circulating outlet along) time, fast repairing water solenoid valve 11 is opened, to moisturizing fast in water tank, until water level rises to HL+10cm.
two, water tank overflow protection: when the anti-overflow protection switch 3 of the interior peak setting of water tank 4 detects the water tank overflow causing due to various abnormal causes; by system control component, cut off the current route that makes water tank water intake; it is heat collector top water solenoid valve 25; or heat pump directly-heated product water line, or fast repairing water solenoid valve 11.
three, water tank high temperature protection: it is adjustable that the water tank temperature T3 detecting when Water in Water Tank temperature sensor 20 is greater than the protection temperature T S5(numerical value of setting; generally be made as 85 ℃) time; high temperature protection drain solenoid valve 22 is opened; the hot water of excess Temperature in water tank is discharged to 80% of current water level; then open fast repairing water solenoid valve 11; to water tank, fill into cold water, until water tank temperature T3 drops to than setting, protect temperature T S5 low more than 10 ℃, or water tank full water.
four, pipeline antifreeze function: it is adjustable that the heat collector bottom temp T2 that the heat collector head temperature T1 detecting when heat collector top water temperature sensor 2 or temperature sensor 27 detect is less than anti-frost protection design temperature TS7(numerical value; generally be made as 5 ℃) time, start heat collector circulating pump 24 anti-frost protection is carried out in heat collector loop.When the cold water pipes temperature T 5 detecting when the temperature sensor 23 on cold water pipeline is less than anti-frost protection design temperature TS7, opens electric-heating belt 13 and carry out cold water pipes anti-frost protection.When the temperature that detects source pump circulation line when the temperature sensor 7 on source pump closed circuit is less than anti-frost protection design temperature TS7, opens unit circulating pump 18 source pump 8 and circulation line thereof are carried out to anti-frost protection.When the temperature that detects electric auxiliary thermal cycle pipeline when the temperature sensor 5 on electric heating device closed circuit is less than anti-frost protection design temperature TS7, opens electric auxiliary hot recycle pump 19 electric heating device 6 and circulation line thereof are carried out to anti-frost protection.
five, source pump and electric heater current cutting protection: be arranged on the first water flow switch 15 on electric heating device closed circuit, the second water flow switch 16 on source pump closed circuit and link with the start stop signal of electric heating device 6 and source pump 8 respectively; when respective cycle pipeline is cut off the water supply; relevant device is shut down and maybe can not be started at once, to protect relevant device.
six, when tap water supply pressure is lower, at the directly-heated of described source pump 8, produce the booster pump 9 that is provided for increasing source pump cold water pressure of supply water on water water inlet cold water pipeline, to guarantee that unit intake pressure and directly-heated produce the flow of water, prevent the condensation temperature of source pump too high and compressor pressure ratio and excessive discharge temperature.
seven, system is used water supply booster pump 17 to hot water water pipe net 14 hot-water supplies, when the temperature sensor 12 on described hot water water pipe network 14 ends (being return pipe front end) pipeline, to detect water return pipeline water temperature T 4 adjustable lower than setting value TS6(numerical value, generally be set as 33 ℃) time, open backwater magnetic valve 10, the pressure producing by described hot water water supply booster pump 17, the water water of having lowered the temperature in hot water water pipe network is returned into water tank 4, keep the water temperature of hot water water pipe network.
embodiment 3:
if Fig. 3 is in conjunction with Fig. 4, shown in Fig. 5, the present embodiment is compared with embodiment 2, hot water water supply booster pump 17 and corresponding water pipe network backwater magnetic valve 10 have been cancelled, adopt gravity to water pipe network hot-water supply, corresponding water pipe network end pipeline minimum point is provided with user's pipeline return circulating pump 28, the water return pipeline water temperature T 4 start and stop user pipeline return circulating pumps 28 that user's pipeline return circulating pump 28 detects according to the temperature sensor 12 on return pipe, to keep the water temperature of water pipe network to be not less than setting value TS6, the setting of the present embodiment miscellaneous part and method of work are with embodiment 2.
above by reference to the accompanying drawings the preferred specific embodiment of described the utility model only for embodiment of the present utility model is described; rather than as the restriction to aforementioned utility model object and appended claims content and scope; every foundation technical spirit of the present utility model, to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs to the utility model technology and rights protection category.

Claims (10)

1. a solar energy central hot water system, comprise solar thermal collector array (1) and water tank (4), on the first circulating outlet (401), heat collector circulating pump (24), solar thermal collector array (1) and water tank (4) on water tank (4) first loops back the mouth of a river (401) and is connected successively by pipeline, and water tank (4) is connected with hot water water pipe network (14); It is characterized in that: between described heat collector circulating pump (24) and solar thermal collector array (1), be provided with check valve (26), between described check valve (26) and solar thermal collector array (1), by top water solenoid valve (25), be connected with tap water supply pipeline.
2. a kind of solar energy central hot water system according to claim 1, it is characterized in that: described system also comprises source pump (8), described source pump (8) is provided with circulating-heating water inlet (801), directly-heated produces water water inlet (802) and delivery port (803); On water tank (4), offer the second circulating outlet (402), second and loop back the mouth of a river (405), the second circulating outlet (402) is connected by pipeline successively with unit circulating pump (18), circulating-heating water inlet (801), and delivery port (803) and second loops back the mouth of a river (405) and is connected with pipeline; Directly-heated produces water water inlet (802) and is connected with tap water supply pipeline.
3. a kind of solar energy central hot water system according to claim 2, it is characterized in that: on described water tank (4), offer the 3rd circulating outlet (403) and the 3rd and loop back the mouth of a river (406), the 3rd circulating outlet (403), electric auxiliary hot recycle pump (19), electric heating device (6), the 3rd loop back the mouth of a river (406) and connect in turn by pipeline.
4. a kind of solar energy central hot water system according to claim 1, is characterized in that: described solar thermal collector array (1) arranges heat collector top water temperature sensor (2) along the port of export of the end heat collector of water (flow) direction; In described water tank (4), be provided with Water in Water Tank temperature sensor (20) and cistern water level sensor (21); Described each sensor is connected with system controller part.
5. a kind of solar energy central hot water system according to claim 3, is characterized in that: between the circulating-heating water inlet (801) of described source pump (8) and unit circulating pump (18), near-thermal pump assembly (8) locates to be provided with heat pump cycle pipeline temperature sensor (7) and the first water flow switch (15); Between described electric heating device (19) and electric auxiliary hot recycle pump (19), be provided with electric auxiliary heating circulation line temperature sensor (5) and the second water flow switch (16); On tap water supply pipeline in described system, be provided with antifreeze electric-heating belt (13); Described each sensor is connected with system controller part.
6. according to a kind of solar energy central hot water system described in claim 1 or 4, it is characterized in that: the end of described hot water water pipe network (14) loops back the mouth of a river (408) with the 5th of water tank (4) and is connected, described solar thermal collector array (1) inlet duct is provided with heat collector bottom cooling-water temperature sensor (27), the end of hot water water pipe network (14) is provided with return pipe cooling-water temperature sensor (12), described tap water supply pipeline is provided with cold water pipes temperature sensor (23), and described each sensor is connected with system controller part.
7. a kind of solar energy central hot water system according to claim 1; it is characterized in that: the peak of described water tank (4) is provided with the anti-overflow protection switch (3) being connected with system controller part; the bottom of water tank (4) is provided with high temperature protection drain solenoid valve (22), and the 4th of water tank (4) loops back the mouth of a river (407) and is connected with tap water supply pipeline by fast repairing water solenoid valve (11).
8. a kind of solar energy central hot water system according to claim 2, is characterized in that: described source pump (8) is provided with unit cold water water supply booster pump (9) with water supply pipe junction.
9. a kind of solar energy central hot water system according to claim 6, it is characterized in that: the front end of described hot water water pipe network (14) water (flow) direction is provided with water supply booster pump (17), between hot water water pipe network (14) and water tank (4), be provided with water pipe network backwater magnetic valve (10).
10. a kind of solar energy central hot water system according to claim 6, is characterized in that: the end of described hot water water pipe network (14) is provided with user's pipeline return circulating pump (28).
CN201320755861.1U 2013-11-25 2013-11-25 Solar centralized water heating system Expired - Fee Related CN203586373U (en)

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CN201320755861.1U CN203586373U (en) 2013-11-25 2013-11-25 Solar centralized water heating system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105946154A (en) * 2016-06-07 2016-09-21 安徽省华晟塑胶股份有限公司 Nylon 66 cord heating equipment
CN109990494A (en) * 2019-03-13 2019-07-09 湖南工业大学 Energy-efficient solar water supply system and its control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105946154A (en) * 2016-06-07 2016-09-21 安徽省华晟塑胶股份有限公司 Nylon 66 cord heating equipment
CN109990494A (en) * 2019-03-13 2019-07-09 湖南工业大学 Energy-efficient solar water supply system and its control method

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