CN201407834Y - Split type solar water heater with hot water storage tank with a plurality of water storage chambers - Google Patents
Split type solar water heater with hot water storage tank with a plurality of water storage chambers Download PDFInfo
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- CN201407834Y CN201407834Y CN2009200138919U CN200920013891U CN201407834Y CN 201407834 Y CN201407834 Y CN 201407834Y CN 2009200138919 U CN2009200138919 U CN 2009200138919U CN 200920013891 U CN200920013891 U CN 200920013891U CN 201407834 Y CN201407834 Y CN 201407834Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Abstract
The utility mode relates to the filed of solar water heaters, in particular to a split type solar water heater with a hot water storage tank with a plurality of water storage chambers. Two or more than two water storage chambers are arranged in the hot water storage tank, a communicating pipe orifice is arranged on each water storage chamber, and the communicating pipe orifice is connected with acommunicating pipeline; a water stop breather valve is installed on the upper end of the high temperature water storage chamber arranged in the hot water storage tank, so as to achieve that two statuses that pressure does not exist in the hot water storage tank and the pressure exists in the hot water storage tank when hot water is used are automatically converted when the split type solar water heater circularly exchanges heat, and the water in a circulation line discharges and flows into the hot water storage tank after the heat-exchange circulation; in addition, when the hot water is used,the running water with the pressure is driven into a low temperature water storage chamber, the water in the low temperature water storage chamber is driven into the bottom of the high temperature water storage chamber through the communicating pipe orifice and the communicating pipeline form bottom to top, and the water in the high temperature water storage chamber is driven out of a water mixingvalve through a hot water discharging pipeline connected with the water outlet of the hot water storage tank form bottom to top. The split type solar water heater solves the problem that the temperature is integrally reduced after the low temperature running water enters into the hot water storage tank and mixes with the hot water in the hot water storage tank.
Description
Technical field
The utility model relates to the solar water heater field, specifically is the separated type solar hot-water apparatus that a kind of heat storage water tank has a plurality of reservoir chambers.
Background technology
At present, the solar water heater that people use in life mainly contains whole machine installing type, centralized and split type etc.Its principle all is to absorb solar energy by solar thermal collector, utilize the heat exchange circulation of water or heat-conducting medium indirect heat exchange form with the heating of the water at low temperature in the heat storage water tank for people's use of living.But because in use all there are certain practical problem in the building structure and the various water heater self structure problem of residential building.For example, whole machine formula: because its model and specification disunity, cause and put in disorderly at the dwelling house roof, influence the appearance of the city, destroying the waterproof aspect of roof in varying degrees again, all have certain hidden danger for safety, lightning protection, the shock resistance of building.Whole machine solar water heater hot water delivery pipe line length need bleed off a large amount of cold water during use, causes the waste of water resource, heat energy; In addition, night, the heat waste amount was big in the winter time to place outdoor heat storage water tank.Separated type solar hot-water apparatus in the past, no matter be pressure-bearing type or non-bearing type, be water direct heat-exchange or medium heat conduction, the heat-energy losses of heat exchange circulation line is very big in heat exchanging process, cause the solar energy hot-water apparatus heating efficiency low, heating efficiency can be lower under the situation that environment temperature is lower especially in the winter time; In the winter time, steam distillation, freeze the stifled vapour booster that expands that produces, antifreeze heating tape improper use and quality problems easy firing are on fire; In addition, rely on band to press running water to eject the separated type solar hot-water apparatus of the hot water in the heat storage water tank, when using hot water, low temperature running water jacking heat storage water tank, hot water is ejected mixed water valve, when hot water use to finish in the jacking heat storage water tank of back the low temperature running water with the hot water integral body in the water tank is lowered the temperature after hot water in the water tank mixes, water temperature is reduced to the bathing temperature when following in mixing rear cabinet, must start electrical heating before the bathing, but the water in the water tank is heated to the bathing temperature, has therefore caused unnecessary waste of energy.
The utility model content
At above-mentioned situation, the separated type solar hot-water apparatus that the utility model provides a kind of heat storage water tank to have a plurality of reservoir chambers, to solve existing whole machine installing type, solar water heater product such as centralized and split type, in use low, the pipeline of the heating efficiency of Cun Zaiing freeze stifled, vapour expands, and bombing is leaked, the low temperature running water enters heat storage water tank, problem such as stops using hot water in the hot water rear cabinet to mix with running water to cause that the interior hot water integral body of water tank is lowered the temperature significantly.
The technical solution of the utility model is:
A kind of heat storage water tank has the separated type solar hot-water apparatus of a plurality of reservoir chambers, be provided with two or more reservoir chambers in the heat storage water tank in the separated type solar hot-water apparatus, on each reservoir chamber, be provided with the connection mouth of pipe, be connected with connecting pipeline on the connection mouth of pipe; Reservoir chamber is divided into high temperature reservoir chamber and one or more low temperature reservoir chamber, in the high temperature reservoir chamber upper end of heat storage water tank the sealing breather valve is housed.
Described separated type solar hot-water apparatus, this device is provided with the watering pipeline that links to each other with the water inlet of heat storage water tank, and water control valve is being housed on the watering pipeline; Heat storage water tank also is connected with circulation watering pipeline and circulation drainage pipeline respectively, and circulation line control valve and water circulating pump are housed on the circulation watering pipeline; On the circulation drainage pipeline, check-valves is housed; The delivery port of heat storage water tank is connected with hot water effluent's pipeline, and the water tank temperature sensor is housed in heat storage water tank.
Described separated type solar hot-water apparatus at the circulation watering pipeline of water circulating pump inlet end with stride across between the watering pipeline of circulation line control valve and be connected with the emptying pipeline, is equipped with emptying pipeline check-valves on the emptying pipeline.
Described separated type solar hot-water apparatus is connected with water ponding discharge pipe down between circulation watering pipeline and circulation drainage pipeline; On the water ponding discharge pipe non-return valve is being housed down, on the circulation watering pipeline, be connected with the ponding discharge pipe, the ponding discharge pipe communicates with following water ponding discharge pipe, and the ponding pipe-line control valve is housed on the ponding discharge pipe, on the ponding discharge pipe fault alarm is housed.
Described separated type solar hot-water apparatus, with hot water effluent's pipeline that the delivery port of heat storage water tank links to each other on sensor is housed; Perhaps, the use that makes at the water of indoor water tank is equipped with gauge tap.
Described separated type solar hot-water apparatus, circulation watering pipeline that is connected with heat storage water tank and circulation drainage pipeline upper end are connected with solar thermal collector, in the upper end of circulation drainage pipeline or in the upper end of circulation watering pipeline or in heat collector water tank upper end, respirator is housed.
Described separated type solar hot-water apparatus, in the heat collector upper end heat collector water tank is arranged, in upper end, heat collector water tank both sides plug-in type water inlet pipe mouth and plug-in type effluent pipe mouth are housed respectively, the plug-in type water inlet pipe mouth links to each other with the circulation drainage pipeline with the circulation watering pipeline respectively with the plug-in type effluent pipe mouth; Below the heat collector water tank that plug-in type water inlet pipe mouth and plug-in type effluent pipe mouth are housed, vacuum heat collection pipe is housed, the metal heat exchanger tube is equipped with in the vacuum heat collection pipe the inside, horn mouth sealing tube head is arranged on the metal heat exchanger tube, one end of horn mouth sealing tube head is the heat exchanger tube mouth of pipe, the other end of horn mouth sealing tube head is connected with the heat exchange tube body of bottom shutoff, and the metal heat exchanger tube links to each other with the water tank connector by sealing ring in the position of horn mouth sealing tube head.
The beneficial effects of the utility model are:
1, the utility model is owing to adopted the design of a plurality of reservoir chambers and the connecting pipeline that is connected by the connection mouth of pipe on each reservoir chamber in heat storage water tank, make this device can finish system's heat exchange circulation, in the time of function programs such as circulation line emptying, when using hot water, avoided low temperature running water jacking heat storage water tank, hot water stops using the back running water to mix the whole cooling problem of the water that makes in the heat storage water tank with hot water in the case, guaranteed that the water in the high-temperature cabinet can not be directly by low temperature running water hybrid cooling in the heat storage water tank, thereby the hot water that higher temperature can be arranged when using hot water, make heat storage water tank keep bathing and other to use the temperature of hot water to greatest extent, reduce and start electrical heating, saves energy to greatest extent.
2, the utility model is by the pressure bearing stored boiler, the heat exchange circulation line, water circulating pump and various control, the heat storage water tank combination accessory device of switchable pressure in a kind of novel separated type solar hot-water apparatus that sensing element and intelligence control system are formed, can make the solar thermal collector in the separated type solar hot-water apparatus of each household unify centralized arrangement in architectural realization, heat storage water tank is placed indoor, putting of having solved that existing product in use exists is in disorder, influence the appearance of the city, destroy a series of problems such as waterproof aspect of roof, realize solar energy and architecture-integral.
3, the utility model is when heat exchange circulation of solar energy hot water system and circulation line emptying, and heat storage water tank is in the normal pressure recurrent state; When hot water used, heat storage water tank was in artesian condition.Because the heat storage water tank band pressure two states design of conversion automatically when heat storage water tank does not have pressure and uses hot water when having adopted the systemic circulation heat exchange, make that the water in the circulation line flows into heat storage water tank by the nature drop behind the cycle heat exchange, allow the heat exchange circulation line be able to emptying; When using hot water, band setting-out (running water) injects heat storage water tank through watering pipeline, hot water in the heat storage water tank is ejected mixed water valve by delivery port through hot water effluent's pipeline, allow the user when using hot water, as using convenient, comfortable, the safety of pressure-bearing water-storage electric heater.
4, the utility model is owing to realized the circulation line emptying, solved in the past the separated type solar hot-water apparatus when adopting the direct cycle heat exchange form of water, when heat energy loss that water turns cold in the circulation line after the heat exchange and employing heat transferring medium indirect heat exchange form, heat energy loss problem in heat transfer process has improved solar energy hot water efficient greatly.
5, the utility model is because realized the circulation line emptying, circulation line is when system's heat exchange, heat energy loss is considerably less, circulation line can appropriateness extend, being positioned over away from solar thermal collector of making that heat storage water tank can be relative is indoor, having solved in the past, the solar water heater water storage tank when using hot water, need bleed off the problem of a large amount of cold water from far away with water spot.
6, the emptying circuit design in the utility model (Fig. 1, Fig. 2), make the water in circulation drainage pipeline and the circulation watering pipeline flow to heat storage water tank simultaneously, improved the circulation line intestine evacuation velocity, reduced in the utility model system the control valve delay time that needs delayed start-up, closes, promptly energy-conservation again can not be because of cycle heat exchange and the long normal use that influences hot water of circulation line emptying time.
7, in the utility model device, circulation line has been realized emptying, there is not water behind the cycle heat exchange in the circulation line, do not freeze stifled phenomenon so can not produce pipeline, having solved the past freezes the stifled heating tape, the security hidden trouble of energy loss that causes and heating tape improper use catching fire of adding for preventing pipeline.
8, the utility model has adopted fault alarm on time water ponding discharge pipe and ponding discharge pipe and the pipeline (generally can be water flow sensing unit) design when using: (as Fig. 1, shown in Figure 2) after cycle heat exchange and the circulation line emptying, though the water in heat collector water tank and the heat storage water tank still keeps the water yield of filling with before the heat exchange circulation, but the artesian condition that has the preceding heat storage water tank of heat exchange circulation in circulation drainage pipeline and the circulation watering pipeline switches to a small amount of swelling water that produces in the atmospheric pressure state process of heat exchange circulation back, water ponding discharge pipe and ponding discharge pipe discharge system down can be passed through during the expansion hypervolia, the generation of the normal emptying problem of circulation line can be avoided to realize because of the phenomenon that swelling water is accumulated in the circulation line; In addition, when the check-valves on the circulation drainage pipeline damaged, when last water control valve was in opening, the check-valves that the band setting-out damages on circulation drainage pipeline and circulation drainage pipeline, following water ponding discharge pipe, ponding discharge pipe emitted; And the control valve between watering pipeline and circulation watering pipeline, during as circulation line control valve or the damage of emptying check-valves, when last water control valve is in opening, band setting-out in the watering pipeline or band are pressed a part of preadmission heat storage water tank of running water, and a part of water emits by the ponding discharge pipe through the circulation watering pipeline; When last water control valve damages, before systemic circulation heat exchange, purge routine finish, band setting-out or band are pressed running water to enter heat storage water tank by watering pipeline and are also entered circulation watering pipeline and circulation drainage pipeline, when the systemic circulation heat exchange, when purge routine finishes, this part water can emit by the ponding discharge pipe; When the ponding pipe-line control valve damaged, during the systemic circulation heat exchange, cycle heat exchange water can emit by the ponding discharge pipe through the circulation watering pipeline; Therefore, the design of following water ponding discharge pipe and ponding discharge pipe, avoided being full of water in circulation drainage pipeline that damage or expansion hypervolia because of the various control valve members of system cause or the circulation watering pipeline and can not realize normal emptying, caused the winter circulation line to freeze the generation of stifled problem; On this apparatus system ponding discharge pipe, fault alarm is housed, when system certain control valve member damage produce undesired current by the time in time report to the police, the control valve member of damage is safeguarded as early as possible; And, if producing the high temperature swelling water of high temperature expanding gas and trace, solar thermal collector can both discharge smoothly by circulation line, time water ponding discharge pipe and the ponding discharge pipe of emptying and discharge, changed the history that solar thermal collector in the past can only be breathed by breather valve, avoided solar thermal collector in the winter time breather valve freeze the stifled generation that produces the bloated booster of vapour, splits accidents such as courage because of steam distillation.
Adopt vacuum heat collection pipe to absorb solar energy when 9, the utility model is used, stewing solarization is the water in the metal heat exchanger tube wherein, make its heat up with heat collector water tank in water at low temperature carry out heat exchange, finish heat collector and heat the water process.Because anhydrous in the vacuum heat collection pipe, do not adopt the direct water storage of vacuum heat collection pipe to carry out heat exchange so do not exist in the past, and occur because cold and hot difference big, freeze, produce booster drainage, heat collector heating operation safety and reliability under the situation such as vapour expands.
When 10, the utility model is used, plug-in type water inlet pipe mouth and plug-in type effluent pipe mouth are owing to all insert a segment length (5-20mm) in the heat collector water tank from heat collector water tank upper end, therefore after the circulation line emptying, still keep the original water yield in the heat collector water tank, produced simultaneously siphonage is also come out the water of heat collector water tank upper end by siphon, under special cold conditions, water freezing wherein expands and has reserved the safe space.
11, heat storage water tank possesses the basic function of electric heater by pressure-bearing water-storage electric heater standard design in the utility model, when the solar energy hot coolant-temperature gage is not enough under weather effect, can adopt the auxiliary heating of electricity to guarantee the continuous use of hot water at any time.Simultaneously, heat storage water tank also possesses the superpressure pressure relief in the utility model.
Description of drawings
Fig. 1 is the utility model structural representation;
The 1-heat storage water tank; 2-sealing breather valve; The 3-watering pipeline; The last water control valve of 4-; 5-is communicated with the mouth of pipe; 6-circulation watering pipeline; 7-circulation line control valve; The 8-water circulating pump; The 9-gauge tap; The 10-sensor; 11-downcomer mouth; The 12-heat collector; 13-circulation drainage pipeline; The 14-check-valves; 15-emptying pipeline; 16-emptying pipeline check-valves; 17-ponding discharge pipe; 18-ponding pipe-line control valve; The 19-fault alarm; 20-heat collector water tank; The 21-respirator; 22-plug-in type water inlet pipe mouth; 23-plug-in type effluent pipe mouth; 24-heat collector water tank temperature sensor; The 25-vacuum heat collection pipe; The 26-connecting pipeline; 27-water tank temperature sensor; The 28-intelligent controller; 29-valve group connects plate body; The 30-electric heater; 31-mixes water valve; 32-hot water effluent pipeline; 33-metal heat exchanger tube; The 34-water inlet; The 35-delivery port; Water ponding discharge pipe under the 41-; The 42-non-return valve; The 46-floor drain.
Fig. 2 is the another kind of implementation of an application example of the utility model.
The 1-heat storage water tank; 2-sealing breather valve; The 3-watering pipeline; The last water control valve of 4-; 5-is communicated with the mouth of pipe; 6-circulation watering pipeline; 7-circulation line control valve; The 8-water circulating pump; The 9-gauge tap; The 10-sensor; 11-downcomer mouth; The 12-heat collector; 13-circulation drainage pipeline; The 14-check-valves; 15-emptying pipeline; 16-emptying pipeline check-valves; 17-ponding discharge pipe; 18-ponding pipe-line control valve; The 19-fault alarm; 20-heat collector water tank; The 21-respirator; 22-plug-in type water inlet pipe mouth; 23-plug-in type effluent pipe mouth; 24-heat collector water tank temperature sensor; The 25-vacuum heat collection pipe; The 26-connecting pipeline; 27-water tank temperature sensor; The 28-intelligent controller; 29-valve group connects plate body; The 30-electric heater; 31-mixes water valve; 32-hot water effluent pipeline; 33-metal heat exchanger tube; The 34-water inlet; Water ponding discharge pipe under the 41-; The 42-non-return valve; The 46-floor drain.
Fig. 3 is the true heat exchange tube structure schematic diagram of metal in the heat collector vacuum heat collection pipe in the utility model implementation of an application example;
33-metal heat exchanger tube; 36-horn mouth sealing tube head; The 37-heat exchange tube body; The 38-heat exchanger tube mouth of pipe.
Fig. 4 is that the heat collector water tank is connected profile with vacuum heat collection pipe, metal heat exchanger tube in the utility model implementation of an application example;
20-heat collector water tank; The 25-vacuum heat collection pipe; 33-metal heat exchanger tube; The 38-heat exchanger tube mouth of pipe; The 39-sealing ring; 40-water tank connector.
A represents swelling water storage area in the utility model system among Fig. 1, Fig. 2; G represents the high temperature reservoir chamber in the heat storage water tank 1 among Fig. 1, Fig. 2; D represents the low temperature reservoir chamber in the heat storage water tank 1.
The specific embodiment
As Fig. 1-shown in Figure 2, the utility model structure is mainly by heat storage water tank 1, be communicated with the mouth of pipe 5, connecting pipeline 26, sealing breather valve 2, circulation watering pipeline 6, circulation drainage pipeline 13, water circulating pump 8 and various control valves etc. partly constitute, heat storage water tank 1 is connected with circulation watering pipeline 6 and circulation drainage pipeline 13 respectively, heat storage water tank 1 can be provided with connector separately respectively with being connected of circulation watering pipeline 6 and circulation drainage pipeline 13 on heat storage water tank 1, also can utilize the delivery port of heat storage water tank and water inlet respectively as the connector of circulation watering pipeline 6 and circulation drainage pipeline 13, its concrete structure is as follows:
As Fig. 1-shown in Figure 2, this device is provided with on each reservoir chamber in heat storage water tank 1 and is communicated with the mouth of pipe 5; Reservoir chamber is divided into high temperature reservoir chamber G and low temperature reservoir chamber D, the connecting pipeline 26 that is communicated with each reservoir chamber is housed on the connection mouth of pipe 5 on each reservoir chamber, can be provided with multistage high and low temperature reservoir chamber in the heat storage water tank 1, sealing breather valve 2 is equipped with in high temperature reservoir chamber G upper end at heat storage water tank 1, in high temperature reservoir chamber G, be provided with downcomer mouth 11, downcomer mouth 11 is connected with circulation drainage pipeline 13, check-valves 14 is housed on circulation drainage pipeline 13, water tank temperature sensor 27 and electric heater 30 are housed in heat storage water tank 1; The low temperature reservoir chamber D lower end of heat storage water tank 1 is provided with water inlet 34, and water inlet 34 is connected with circulation watering pipeline 6, and circulation watering pipeline 6 communicates with watering pipeline 3, and water control valve 4 (generally can be magnetic valve) is being housed on the watering pipeline 3; Circulation line control valve 7 (generally can be magnetic valve) is housed on circulation watering pipeline 6; Water circulating pump 8 is housed on circulation watering pipeline 6; The delivery port 35 of heat storage water tank 1 is connected with hot water effluent's pipeline 32, and sensor 10 is housed on hot water effluent's pipeline 32; Perhaps, the water of heat storage water tank 1 make use be equipped with that gauge tap 9 (generally can be near the switching regulator sensor) links to each other by control line with intelligent controller 28 or by the control that links to each other of wireless remote control signal form; Be equipped with on the pipeline between hot water effluent's pipeline 32 and the watering pipeline 3 and mix water valve 31; Be provided with each function valve member below heat storage water tank 1 on the pipeline: water control valve 4, water flow sensing unit 10, circulation line control valve 7 etc., the junction of each function valve member have a valve group to connect plate body 29.
As Fig. 1-shown in Figure 2, respirator 21 is housed in the upper end of circulation drainage pipeline 13; Perhaps, in the upper end of circulation watering pipeline 6; Perhaps, in heat collector water tank 20 upper ends respirator 21 is housed.
The circulation drainage pipeline 13 of this device and the upper end of circulation watering pipeline 6 are connected with heat collector 12, and heat collector 12 is provided with heat collector water tank 20, and heat collector water tank temperature sensor 24 is housed in heat collector water tank 20; On top, heat collector water tank 20 both sides plug-in type water inlet pipe mouth 22 and plug-in type effluent pipe mouth 23 are housed respectively, plug-in type water inlet pipe mouth 22 and plug-in type effluent pipe mouth 23 all insert the inboard segment distance (generally can be 5-20mm) of inner water tank from heat collector water tank 20 tops, they link to each other with circulation drainage pipeline 13 with circulation watering pipeline 6 respectively.
As Fig. 3-shown in Figure 4, one vacuum pumping thermal-collecting tube 25 is housed below heat collector water tank 20, metal heat exchanger tube 33 is equipped with in vacuum heat collection pipe 25 the insides, horn mouth sealing tube head 36 is arranged on the metal heat exchanger tube 33, one end of horn mouth sealing tube head 36 is the heat exchanger tube mouth of pipe 38, the other end of horn mouth sealing tube head 36 is connected with the heat exchange tube body 37 of bottom shutoff, and metal heat exchanger tube 33 links to each other with water tank connector 40 by sealing ring 39 in the position of horn mouth sealing tube head 36.
As Fig. 1-shown in Figure 2, at the circulation watering pipeline 6 of water circulating pump 8 inlet end with stride across between the watering pipeline 3 of circulation line control valve 7 and be connected with emptying pipeline 15; Emptying pipeline check-valves 16 is housed on emptying pipeline 15; Between circulation watering pipeline 6 and circulation drainage pipeline 13, be connected with water ponding discharge pipe 41 down, on the following water ponding discharge pipe 41 non-return valve 42 is housed, on circulation watering pipeline 6, be connected with ponding discharge pipe 17, ponding discharge pipe 17 communicates with following water ponding discharge pipe 41, and ponding pipe-line control valve 18 (generally can be magnetic valve) is housed on ponding discharge pipe 17; Fault alarm 19 (generally can be water flow sensing unit) is housed on ponding discharge pipe 17, and ponding discharge pipe 17 communicates with floor drain 46.
As Fig. 1-shown in Figure 2, in the utility model, intelligent controller 28 joins with the electrical control lines of last water control valve 4, circulation line control valve 7, water circulating pump 8, heat collector water tank temperature sensor 24, water tank temperature sensor 27, ponding pipe-line control valve 18, fault alarm 19, electric heater 30 respectively by automatically controlled circuit.
This utility model device receives the signal that sensory package sends by its control system, command parts actions such as each control valve, water circulating pump, water at low temperature in the heat storage water tank and heat collector in the utility model device are absorbed solar energy, and high-temperature water that the back produces carries out cycle heat exchange, through the several cycle heat exchange coolant-temperature gage in the heat storage water tank is raise, finish solar energy hot water process.And because when having adopted the systemic circulation heat exchange, heat storage water tank does not have the two states design of conversion automatically of pressure and heat storage water tank band pressure use hot water, make that the water in the circulation line flows into heat storage water tank by the nature drop behind the cycle heat exchange, allow the heat exchange circulation line be able to emptying; When using hot water, band setting-out (running water) at first enters the bottom of low temperature reservoir chamber D (low-temperature space) in the heat storage water tank, the water of the higher temperature on low-temperature space top is headed into the bottom of high temperature reservoir chamber G (high-temperature region) earlier by connecting pipeline, finally be that high-temperature-hot-water with top, high-temperature region ejects mixed water valve through delivery port, allow the user when using hot water, as using convenient, comfortable, the safety of pressure-bearing water-storage electric heater, and the low temperature running water just is introduced into low-temperature space after entering heat storage water tank, and the high-temperature region hot water temperature bigger variation can not take place.Simultaneously, solar thermal collector can discharge through the ponding discharge pipe by the circulation line and the emptying pipeline of emptying smoothly as producing the high temperature expanding gas, and having changed the past solar thermal collector can only be by the history of breather valve breathing.
When system installed, the course of work of the present utility model was:
One, aqueous mode on the indoor water tank:
Open intelligent controller 28 power supplys, system enters aqueous mode on the heat storage water tank (restart Shi Douhui after intelligent controller 28 each outages and carry out this pattern) automatically:
Scheme one, when the last water control valve 4 on the watering pipeline 3 is normally open valve (being generally normally open solenoid valve):
1, band setting-out or band press running water to enter heat storage water tank 1 low temperature reservoir chamber D through watering pipeline 3 and last water control valve 4, to mix water valve 31 and be threaded to the unlatching of hot water end, low temperature reservoir chamber D enters heat storage water tank 1 high temperature reservoir chamber G after filling with water, high temperature reservoir chamber G fills with water, closes after mixed water valve 31 water outlets and mixes water valve 31.
2, among Fig. 1-Fig. 2, circulation line control valve 7 (being generally normally closed solenoid valve) cut-out heat storage water tank 1 of closing on the circulation watering pipeline 6 and watering pipeline 3 are communicated with circulation watering pipeline 6; The circulation drainage pipeline 13 that circulation drainage pipeline 13 upper check valves 14 cut off its upper end is by the line segments of check, at the circulation watering pipeline 6 of water circulating pump 8 inlet end with stride across between the watering pipeline 3 of circulation line control valve 7 and be connected with emptying pipeline 15; Emptying pipeline check-valves 16 on emptying pipeline 15 cuts off its connected circulation watering pipeline 6 in upper end, right side by the line segments of check.Cause in this utility model apparatus system when last water and non-heat exchange recurrent state, band setting-out or band press running water to enter heat storage water tank 1 by watering pipeline, and can not enter circulation watering pipeline 6 and circulation drainage pipeline 13;
Scheme two, the last water control valve 4 on the watering pipeline 3 be during for normally close valve (being generally normally closed solenoid valve), as Fig. 1-shown in Figure 2:
1, in system during water, aqueous mode in the startup, to mix water valve 31 and be threaded to the unlatching of hot water end, last water control valve 4 on the watering pipeline 3 is opened and time-delay (closing after generally delaying time 3-10 minute), band setting-out or band press running water to enter low temperature reservoir chamber D in the heat storage water tank 1 through watering pipeline 3 and last water control valve 4, enter again among the high temperature reservoir chamber G of heat storage water tank 1, high temperature reservoir chamber G fills with water, close mixed water valve 31 after mixing water valve 31 water outlets, last water control valve 4 is opened time-delay and is finished, and last water control valve 4 is closed automatically.
Circulation line control valve 7 (being generally normally closed solenoid valve) cut-out heat storage water tank 1 of 2, closing on the circulation watering pipeline 6 and watering pipeline 3 are communicated with circulation watering pipeline 6; Circulation drainage pipeline 13 upper check valves 14 cut off the circulation drainage pipeline 13 of its upper end by the line segments of check; At the circulation watering pipeline 6 of water circulating pump 8 inlet end with stride across between the watering pipeline 3 of circulation line control valve 7 and be connected with emptying pipeline 15; Emptying pipeline check-valves 16 on emptying pipeline 15 cuts off its connected circulation watering pipeline 6 in upper end, right side by the line segments of check; Cause in this utility model device, water tank is when last water, and band setting-out or band press running water to enter heat storage water tank by watering pipeline, and can not enter in circulation watering pipeline 6 and the circulation drainage pipeline 13;
Two, heat exchange circulation, hot water use pattern:
As Fig. 1-shown in Figure 2:
1, the automatic temperature difference heat exchange, circulation, the emptying pattern: the vacuum heat collection pipe 25 on heat collector 12 absorbs solar energy, water in the metal heat exchanger tube 33 wherein boiled in a covered pot over a slow fire shine heating, the water at low temperature that produces in hot water and the heat collector water tank 20 is carried out the cold and hot exchange of gravity type, its temperature is risen, when rise to heat storage water tank 1 in water temperature temperature difference when setting value, intelligent controller 28 is accepted each assembly action of signal command system that heat collector water tank temperature sensor 24 and water tank temperature sensor 27 send, automatically start temperature difference cycle heat exchange program (, pressing intelligent controller 28 cocycle keys) as hand-operated forced circulation time.
Scheme one, when the last water control valve 4 on the watering pipeline 3 is normally open valve (being generally normally open solenoid valve): temperature difference cycle heat exchange program start, last water control valve 4 is closed, and cuts off watering pipeline 3, and band setting-out in the watering pipeline 3 or band press running water can't enter in the heat storage water tank 1; Circulation line control valve 7 is opened, water circulating pump 8 startings, water in the heat storage water tank 1 among the low temperature water tank D is drawn out of, water among the high-temperature water tank G is by connecting pipeline 26 on the connection mouth of pipe 5 of high temperature reservoir chamber G and low temperature reservoir chamber D, that reach high-temperature water tank G bottom simultaneously, enter among the low temperature water tank D, heat storage water tank 1 is by sealing breather valve 2 suck air of upper end simultaneously; Simultaneously, water lines control valve 18 is closed, cut off ponding discharge pipe 17, following water ponding discharge pipe 41 highway sections in non-return valve 42 left sides on the following water ponding discharge pipe 41 are cut off 6 connections to circulation drainage pipeline 13 directions of circulation watering pipeline by non-return valve 42 unidirectional checks; During the circulation watering pipeline 6 of the water that in heat storage water tank 1, is drawn out of the low temperature water tank D by being drained after the circulation last time, can not enter ponding discharge pipe 17, can not directly enter circulation drainage pipeline 13 by water ponding discharge pipe 41 down; Can only be in circulation watering pipeline 6 enters heat collector water tank 20, high-temperature water in the heat collector water tank 20 is ejected, the circulation drainage pipeline 13 that has been drained after circulating last time is through check-valves 14, downcomer mouth 11 by heat storage water tank 1 flows into earlier among the heat storage water tank 1 interior high-temperature water tank G, water among the high-temperature water tank G enters among the low temperature water tank D by the connecting pipeline 26 that reaches high-temperature water tank G bottom on the connection mouth of pipe 5 of high temperature reservoir chamber G and low temperature reservoir chamber D; When the water in heat collector water tank 20 and the heat storage water tank 1 drops to setting value through the temperature difference behind the cycle heat exchange, perhaps to default cycle heat exchange during the concluding time, intelligent controller 28 sends signal, each assembly auto-action of command system (manually pressing intelligent controller 28 cocycle keys again);
As Fig. 1-shown in Figure 2, water circulating pump 8 stops, and circulation line control valve 7 is closed, and drainage pipeline 13 water that circulate this moment rely on the nature drop to flow among the high-temperature water tank G of heat storage water tank 1 through the downcomer mouth 11 of check-valves 14 by heat storage water tank 1; Water in the circulation watering pipeline 6 also relies on the nature drop through water circulating pump 8, emptying pipeline 15, emptying pipeline check-valves 16, enter by watering pipeline 3 among the low temperature reservoir chamber D of heat storage water tank 1, the water yield among high temperature reservoir chamber G and the low temperature reservoir chamber D is by connecting pipeline 26 balances, and heat storage water tank 1 is discharged the gas of inspiration in the cycle heat exchange process by the sealing breather valve 2 of high temperature reservoir chamber G upper end again; After the water emptying in circulation watering pipeline 6, the circulation drainage pipeline 13, ponding pipe-line control valve 18 and last water control valve 4 are opened again automatically; Connecting band presses running water watering pipeline 3 open-minded, and heat storage water tank 1 switches to artesian condition by the atmospheric pressure state in cycle heat exchange and the heat exchanging pipe evacuation procedure; Except circulation line has the swelling water of trace, water in heat collector water tank 20 and the heat storage water tank 1 still keeps the water yield of filling with before the heat exchange circulation basically, system is by above-mentioned situation action, automatically finish heat exchange circulation and heat exchange circulation back circulation line evacuation procedure successively repeatedly, water among high temperature reservoir chamber G in the heat storage water tank 1 and the low temperature reservoir chamber D is heated up, finish solar energy hot water process;
Scheme two, when the last water control valve 4 on the watering pipeline 3 is normally close valve:
Temperature difference cycle heat exchange program start, circulation line control valve 7 is opened, water circulating pump 8 startings, the last water control valve 4 of closing on the watering pipeline 3 cuts off watering pipelines 3, and band setting-out in the watering pipeline 3 or band pressure running water can't the inlet chamber inner water tanks; Water in the heat storage water tank 1 among the low temperature water tank D is drawn out of, water among the high-temperature water tank G is by the connecting pipeline 26 on the connection mouth of pipe 5 on high temperature reservoir chamber G and the low temperature reservoir chamber D simultaneously, the mouth of pipe of the connecting pipeline 26 bottom reaching high-temperature water tank G enters the low temperature water tank D, and heat storage water tank 1 is by sealing breather valve 2 suck air of upper end simultaneously; Simultaneously, ponding pipe-line control valve 18 cuts out, cut off ponding discharge pipe 17, following water ponding discharge pipe 41 highway sections in non-return valve 42 left sides on the following water ponding discharge pipe 41 are cut off 6 connections to circulation drainage pipeline 13 directions of circulation watering pipeline by non-return valve 42 unidirectional checks; When making circulation watering pipeline 6 by being drained after the circulation last time of the water that in heat storage water tank 1, is drawn out of the low temperature water tank D, can not enter ponding discharge pipe 17 and can not directly enter circulation drainage pipeline 13 by water ponding discharge pipe 41 down; Can only be in circulation watering pipeline 6 enters heat collector water tank 20, high-temperature water in the heat collector water tank 20 is ejected, the circulation drainage pipeline 13 that has been drained after last time circulation flows in the heat storage water tanks 1 among the high-temperature water tank G through the downcomer mouth 11 of check-valves 14 by heat storage water tank 1, again among the mouth of pipe inflow low temperature water tank D of the connecting pipeline 26 by reaching high-temperature water tank G bottom; When the water in heat collector water tank 20 and the heat storage water tank 1 drops to setting value through the temperature difference behind the cycle heat exchange, perhaps to default cycle heat exchange during the concluding time, intelligent controller 28 sends signal, each assembly auto-action of command system (perhaps manually pressing intelligent controller 28 cocycle keys again).As Fig. 1-shown in Figure 2, water circulating pump 8 stops, and circulation line control valve 7 is closed, and drainage pipeline 13 water that circulate this moment rely on the nature drop to flow among the high-temperature water tank G of heat storage water tank 1 through the downcomer mouth 11 of check-valves 14 by heat storage water tank 1; Water in the circulation watering pipeline 6 also relies on the nature drop through water circulating pump 8, emptying pipeline 15, emptying pipeline check-valves 16, enter among the low temperature reservoir chamber D of heat storage water tank 1 by watering pipeline 3, the water yield among high temperature reservoir chamber G and the low temperature reservoir chamber D is by connecting pipeline 26 balances, and heat storage water tank 1 is discharged the gas of inspiration in the cycle heat exchange process by the sealing breather valve 2 of high temperature reservoir chamber G upper end again; Circulation watering pipeline 6, after the water emptying in the circulation drainage pipeline 13, ponding pipe-line control valve 18 is opened automatically, last water control valve 4 still is in closed condition, cut off heat storage water tank 1 and press being communicated with of running water watering pipeline 3 with band, heat storage water tank 1 is by in cycle heat exchange and the heat exchanging pipe evacuation procedure still being atmospheric pressure state, water in heat collector water tank 20 and the heat storage water tank 1 still keeps the water yield of filling with before the heat exchange circulation basically, system is by above-mentioned situation action, automatically finish heat exchange circulation and heat exchange circulation back circulation line evacuation procedure successively repeatedly, water among high temperature reservoir chamber G in the heat storage water tank 1 and the low temperature reservoir chamber D is heated up, finish solar energy hot water process;
2, hot water use:
Scheme one, when the last water control valve 4 on the watering pipeline 3 is normally open valve: open mixed water valve 31 and go to the hot water end, band setting-out or band press running water by among the low temperature water tank D in the watering pipeline 3 jacking heat storage water tanks 1, with the bottom of the water of the low temperature water tank D upper strata higher temperature connecting pipeline 26 jacking high-temperature water tank G by reaching high-temperature water tank G bottom, the high-temperature water of high-temperature water tank G upper end ejected by hot water effluent's pipeline 32 through the delivery port 35 of heat storage water tank 1 mix water valve 31; Stop using hot water, close and mix water valve 31, finish and use the hot water process, heat storage water tank 1 is an atmospheric pressure state in systemic circulation heat exchange and circulation line evacuation procedure, is artesian condition in the hot water use;
Scheme two, when the last water control valve 4 on the watering pipeline 3 is normally close valve: open mixed water valve 31 and go to the hot water end, hot water effluent's pipeline 32 of heat storage water tank 1 and the water in the circulation drainage pipeline 13 flow out by the nature drop and mix water valve 31, signal is sent in sensor 10 on hot water effluent's pipeline 32 (generally can be water flow switch) action, and intelligent controller 28 is accepted the signal that sensor 10 sends and opened water control valve 4; Perhaps, gauge tap 9 (generally can be near the switching regulator sensor) sends wire signal or wireless remote control signal, intelligent controller 28 acknowledge(ment) signals are opened water control valve 4, be with this moment setting-out or band to press running water by among the low temperature water tank D in the watering pipeline 3 jacking heat storage water tanks 1, with the bottom of the water of the low temperature water tank D upper strata higher temperature connecting pipeline 26 jacking high-temperature water tank G by reaching high-temperature water tank G bottom, the high-temperature water of high-temperature water tank G upper end ejected by hot water effluent's pipeline 32 through the delivery port 35 of heat storage water tank 1 mix water valve 31; Stop using hot water, close and mix water valve 31, sensor 10 actions, or gauge tap 9 (generally can be) action near the switching regulator sensor, intelligent controller 28 acknowledge(ment) signals commander goes up water control valve 4 and closes, cut off watering pipeline 3, finish and use the hot water process, heat storage water tank 1 is in artesian condition in this process;
Circulation line control valve 7 has interlock function with last water control valve 4, and promptly when systemic circulation heat exchange ON cycle pipe-line control valve 7, last water control valve 4 can not be unlocked; And when water control valve 4 was opened on using hot water, circulation line control valve 7 can not be unlocked;
Three, safe, the warning of the discharging of swelling water and ponding discharge pipe:
After systemic circulation heat exchange emptying, though the water in heat collector water tank 20 and the heat storage water tank 1 still keeps the water yield of filling with before the heat exchange circulation, but the heat storage water tank 1 of artesian condition before the cycle heat exchange is switched to the heat storage water tank 1 of heat exchange circulation back atmospheric pressure state, a small amount of swelling water that can produce in this process is (among Fig. 1-Fig. 2, A represents swelling water storage area in the utility model system), can be accumulated in the circulation line as discharging at once not, make the water in the circulation line of heat storage water tank 1 upper end can not realize thorough emptying;
1, the discharging of swelling water:
Scheme one, when the last water control valve 4 on the watering pipeline 3 is normally open valve:
As Fig. 1-shown in Figure 2, circulation watering pipeline 6, when the water emptying in the circulation drainage pipeline 13 finishes, last water control valve 4 on the watering pipeline 3 is opened again, connecting band presses running water watering pipeline 3 open-minded, heat storage water tank 1 switches to artesian condition by the atmospheric pressure state in cycle heat exchange and the heat exchanging pipe evacuation procedure, heat storage water tank 1 switches to the micro-swelling water that atmospheric pressure state can produce once more during next time systemic circulation heat exchange, accumulating when too much when swelling water can be by water ponding discharge pipe 41 down, non-return valve 42, ponding discharge pipe 17 gives off outside the system, guarantee that no swelling water is accumulated in the circulation line, realize the normal emptying of circulation line;
Scheme two, when the last water control valve 4 on the watering pipeline 3 is normally close valve:
As Fig. 1-shown in Figure 2, after this device cycle heat exchange and the circulation line emptying, though the water in heat collector water tank 20 and the heat storage water tank 1 still keeps the water yield of filling with before the heat exchange circulation, but in the time of may having cycle heat exchange in circulation drainage pipeline 13 and the circulation watering pipeline 6, use the artesian condition of heat storage water tank 1 behind the hot water to switch to a small amount of swelling water that produces in the atmospheric pressure state process behind the cycle heat exchange; Accumulate when too much and can give off outside the system when swelling water, guarantee that no swelling water is accumulated in the circulation line, the normal emptying of realization circulation line by water ponding discharge pipe 41, non-return valve 42, ponding discharge pipe 17 down;
2, the safety of ponding discharge pipe and warning:
When the check-valves on the circulation drainage pipeline 13 14 damages, when last water control valve 4 was in opening, the check-valves 14 that the band setting-out damages on circulation drainage pipeline 13 and circulation drainage pipeline, following water ponding discharge pipe 41, ponding discharge pipe 17 emitted; And the control valve between watering pipeline 3 and circulation watering pipeline 6, during as circulation line control valve 7 or 16 damages of emptying pipeline check-valves, under heat storage water tank 1 artesian condition, and when going up water control valve 4 and being in opening, band setting-out in the watering pipeline 3 or band are pressed a part of preadmission heat storage water tank 1 of running water, and a part of water emits by ponding discharge pipe 17 through circulation watering pipeline 6; When last water control valve 4 damaged, before systemic circulation heat exchange, purge routine finished, band setting-out or band pressed running water to enter heat storage water tank 1 by watering pipeline, also enter circulation watering pipeline 6 and circulation drainage pipeline 13.When the systemic circulation heat exchange, when purge routine finishes, this part water can emit by ponding discharge pipe 17; When ponding pipe-line control valve 18 damaged, during the systemic circulation heat exchange, cycle heat exchange water can emit by ponding discharge pipe 17 through circulation watering pipeline 6; Can be during the expansion hypervolia that produces in the atmospheric pressure state of heat storage water tank 1 and the artesian condition handoff procedure by water ponding discharge pipe 41 and ponding discharge pipe 17 discharge systems down; Therefore, the design of following water ponding discharge pipe 41 and ponding discharge pipe 17, avoided being full of water in circulation drainage pipeline 13 that damage or expansion hypervolia because of the various control valve members of system cause or the circulation watering pipeline 6 and can not realize normal emptying, caused the winter circulation line to freeze the generation of stifled problem; On this apparatus system ponding discharge pipe 17, fault alarm 19 is housed, when system certain control valve member damage produce undesired current by the time in time report to the police, the control valve member of damage is safeguarded as early as possible; And, if producing the high temperature swelling water of high temperature expanding gas and trace, solar thermal collector 12 can both discharge smoothly by circulation line, time water ponding discharge pipe 41 and the ponding discharge pipe 17 of emptying and discharge, changed the history that solar thermal collector 12 in the past can only be breathed by breather valve, avoided solar thermal collector 12 in the winter time breather valve freeze the stifled generation that produces the bloated booster of vapour, splits accidents such as courage because of steam distillation.
On this apparatus system ponding discharge pipe 17, fault alarm 19 is housed, when system certain control valve member damage produce undesired current by the time in time report to the police, the control valve member of damage is safeguarded as early as possible.
Claims (7)
1, a kind of heat storage water tank has the separated type solar hot-water apparatus of a plurality of reservoir chambers, it is characterized in that: the heat storage water tank in the separated type solar hot-water apparatus is provided with two or more reservoir chambers in (1), on each reservoir chamber, be provided with the connection mouth of pipe (5), be connected with connecting pipeline (26) on the connection mouth of pipe (5); Reservoir chamber is divided into high temperature reservoir chamber and one or more low temperature reservoir chamber, in the high temperature reservoir chamber upper end of heat storage water tank sealing breather valve (2) is housed.
2, according to the described separated type solar hot-water apparatus of claim 1, it is characterized in that: this device is provided with the watering pipeline (3) that links to each other with the water inlet (34) of heat storage water tank (1), and water control valve (4) is housed on watering pipeline (3); Heat storage water tank (1) also is connected with circulation watering pipeline (6) and circulation drainage pipeline (13) respectively, and circulation line control valve (7) and water circulating pump (8) are housed on circulation watering pipeline (6); Check-valves (14) is housed on circulation drainage pipeline (13); The delivery port (35) of heat storage water tank (1) is connected with hot water effluent's pipeline (32), and water tank temperature sensor (27) is housed in heat storage water tank (1).
3, according to the described separated type solar hot-water apparatus of claim 2, it is characterized in that: at the circulation watering pipeline (6) of water circulating pump (8) inlet end with stride across between the watering pipeline (3) of circulation line control valve (7) and be connected with emptying pipeline (15), emptying pipeline check-valves (16) is housed on emptying pipeline (15).
4, according to the described separated type solar hot-water apparatus of claim 2, it is characterized in that: between circulation watering pipeline (6) and circulation drainage pipeline (13), be connected with water ponding discharge pipe (41) down; On the water ponding discharge pipe (41) non-return valve (42) is being housed down, on circulation watering pipeline (6), be connected with ponding discharge pipe (17), ponding discharge pipe (17) communicates with following water ponding discharge pipe (41), ponding pipe-line control valve (18) is housed on ponding discharge pipe (17), fault alarm (19) is housed on ponding discharge pipe (17).
5, according to the described separated type solar hot-water apparatus of claim 2, it is characterized in that: with hot water effluent's pipeline that the delivery port (35) of heat storage water tank (1) links to each other on sensor (10) is housed; Perhaps, the use that makes at the water of indoor water tank is equipped with gauge tap (9).
6, according to the described separated type solar hot-water apparatus of claim 2, it is characterized in that: circulation watering pipeline (6) that is connected with heat storage water tank (1) and circulation drainage pipeline (13) upper end are connected with solar thermal collector (12), in the upper end of circulation drainage pipeline (13) or in the upper end of circulation watering pipeline (6) or in heat collector water tank upper end, respirator (21) is housed.
7, according to the described separated type solar hot-water apparatus of claim 6, it is characterized in that: heat collector water tank (20) is arranged in heat collector (12) upper end, in upper end, heat collector water tank (20) both sides plug-in type water inlet pipe mouth (22) and plug-in type effluent pipe mouth (23) are housed respectively, plug-in type water inlet pipe mouth (22) links to each other with circulation drainage pipeline (13) with circulation watering pipeline (6) respectively with plug-in type effluent pipe mouth (23); Below the heat collector water tank (20) that plug-in type water inlet pipe mouth (22) and plug-in type effluent pipe mouth (23) are housed, vacuum heat collection pipe (25) is housed, metal heat exchanger tube (33) is equipped with in vacuum heat collection pipe (25) the inside, horn mouth sealing tube head (36) is arranged on the metal heat exchanger tube (33), one end of horn mouth sealing tube head (36) is the heat exchanger tube mouth of pipe (38), the other end of horn mouth sealing tube head (36) is connected with the heat exchange tube body (37) of bottom shutoff, and metal heat exchanger tube (33) links to each other with water tank connector (40) by sealing ring (39) in the position of horn mouth sealing tube head (36).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200138919U CN201407834Y (en) | 2009-05-22 | 2009-05-22 | Split type solar water heater with hot water storage tank with a plurality of water storage chambers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200138919U CN201407834Y (en) | 2009-05-22 | 2009-05-22 | Split type solar water heater with hot water storage tank with a plurality of water storage chambers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813390A (en) * | 2010-03-31 | 2010-08-25 | 昆明顶好太阳能科技有限公司 | Separated type solar heat storage water tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813390A (en) * | 2010-03-31 | 2010-08-25 | 昆明顶好太阳能科技有限公司 | Separated type solar heat storage water tank |
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Granted publication date: 20100217 Termination date: 20110522 |