CN1243233A - Combined drinking-water heater and cyclic heating system - Google Patents

Abstract

A combined potable water heater and hydronic heating system including:a water tank for holding hydronic heating water;a flue extending through the tank;a burner below the flue so that heat and exhaust gases generated by the burner pass through the flue to heat the water in the tank; anda potable water container mounted in the tank so that the hydronic heating water heats the water in the potable water container and so that the hydronic water is separated from the potable water.

Description

Combined drinking-water heater and loop heating system

The present invention relates to drinking water heater and circulating heater.

Existing dwelling house comprises that with gas heater one is drunk water tank, combustion chamber, the gas burner in the combustion chamber under water tank, also has a flue that is upward through water tank from the combustion chamber, so that use from the water in the heat heating water tank of flue.

Existing dwelling house comprises the boiler that utilizes pipeline to link to each other with radiator with loop heating system.

The invention provides a kind of assembled drinking water combustion heater and loop heating system.The inventive system comprises an existing gas heater, and just circulating hot water heats in water tank, rather than drinking water heats in water tank with the flue that extends through water tank.Drinking water heats in heat exchanger or drinking water container, preferably heats in the helical pipe around flue in water tank.Drinking water is heated by circulating hot water in water tank like this, and maintenance separates with circulating hot water.

Combined drinking-water heater and loop heating system preferably are arranged in the operating room that relative few people enter, and this device is particularly useful for apartment or other little life residence.This device is fit to polytype combustion gas, comprises natural gas, liquefied petroleum gas (LP) and manufactured gas, manufactured fuel gas.This device low cost of manufacture and easy operating and maintenance.

The present invention also is provided for keeping the isolator of the helix pitch of helical pipe in the delivery transportation, this isolator is fixed on the flue.

The present invention also provides a kind of special joint, is used to connect helical pipe inlet end and the outer pipeline of water tank.This special joint comprises that is installed in the outer external screw thread spud of water tank, and the outer end of this spud has interior chamfering.The end of helical pipe extends through spud, and this special joint also comprises the sealing shroud around the helical pipe end, and its interior section be threaded onto on the spud, around adapter piece sealing shroud and that have interior chamfering.Sealing shroud is compacted between these two chamferings, and sealing ring is around the sealing of the end of helical pipe as a result, and sealed spud and and adapter piece, thereby get up with respect to tank seal in the end of helical pipe.Adapter piece also has an exterior section, is tightly connected with external pipe, and external pipe is sealedly connected with the helical pipe end like this.The internal diameter of external pipe is bigger than the external diameter of helical pipe end, like this if the helical pipe end extends beyond adapter piece and then can extend in the external pipe.

By following detailed description, claims and accompanying drawing, other features and advantages of the present invention can become very clear to the relevant technologies personnel.

Accompanying drawing comprises:

Fig. 1 implements schematic representation of apparatus of the present invention.

Fig. 2 is the partial perspective view of this device.

Fig. 3 is that this device removes front view behind the door.

Fig. 4 is the cutaway view of water tank

Fig. 5 is the partial sectional view that water tank amplifies.

Fig. 6 is the cutaway view of special joint.

Fig. 7 is a manipulated or operated apparatus.

Fig. 8 is the vertical view of operating room's base assembly, comprises annulus and end plate.

Fig. 9 is the front view of operating room's base assembly, burner and Control Component.

Figure 10 is a manipulated or operated apparatus.

Figure 11 is the stereogram of manufactured gas, manufactured fuel gas's burner.

Figure 12 is the vertical view of manufactured gas, manufactured fuel gas's burner.

Figure 13 is the cutaway view of manufactured gas, manufactured fuel gas's burner.

Figure 14 is the cutaway view of neat gas burner.

Figure 15 is to use the view of the flame shape of natural gas burning device.

Figure 16 is to use the view of flame shape of manufactured gas, manufactured fuel gas's burner.

Before in detail explaining embodiments of the invention, be to be understood that the present invention is not limited to describe below or accompanying drawing provides detailed construction and arrangement.The present invention can have other embodiment and practical application or embodied in other.Should also be appreciated that used wording or term are just in order to illustrate rather than to limit here.Used " comprising " and " comprising " and change thereof mean and contain project and its equivalents and the addition item of hereinafter enumerating.

Device 10 of the present invention is shown in Fig. 1-3.Should be understood that Fig. 1 is not the accurate expression of member relative position and distance in the device 10, but be useful the operation principle of understanding device 10.Device 10 is a kind of combined drinking-water heater and loop heating system.Device 10 comprises an operating room 14, operating room 14 comprises a rear wall 18 that cardinal principle is vertical, extend forward from rear wall 18 relative both sides, common parallel, vertical sidewall 22 and 26 substantially, one is extended forward from rear wall 18 bottoms and the substrate 30 of the common level between two side 22,26, and one is extended forward from rear wall 18 tops and the roof 34 of the common level between the two side.Operating room 14 comprises that also one is extended forward and the shelf 38 of common level between two side 22,26 from rear wall 18, thereby constitutes upper space 42 between shelf 38 and roof 34, constitutes lower space 46 between shelf 38 and substrate 30.Operating room 14 also comprises detachable 50 (part is shown in Fig. 3) to the doorstep that are used for closing upper space 42 fronts, a detachable Xiamen 54 that is used for closing lower space 46 fronts.Operating room 14 also comprise one to the doorstep 50 and Xiamen 54 between panel 56.Panel 56 is pivotally lowered into the position (being shown in Fig. 2) of common level around pivot, makes to enter the inside of operating room 14 in order to maintain Feedwater Heater and loop heating system, and can be used as the shelf of attendant's place tool and part.Circuit diagram shown in Figure 7 preferably is arranged in the inner surface of panel 56, and panel 56 changes following time and can see circuit like this.The width of operating room 14 is preferably about 20 inches, and highly is approximately 66 inches.

A common vertical end plate 58 (Fig. 2 and Fig. 8) is fixed in the substrate 30 in the rear wall 18 of operating room 14.End plate 58 (Fig. 2) comprises the first, second, third, fourth, the 5th, the 6th water or the gas joint 61,62,63,64,65 and 66 that extends through operating room's rear wall 18 respectively.First joint 61 links to each other with gas source, and second joint 62 is decompression gas outlets, and the 3rd joint 63 is drinking water inlets, and the 4th joint 64 is drinking water outlets, and the 5th joint 65 is circulating hot water inlets, and the 6th joint 66 is circulating hot water outlets.The function of these joints is explained below.

Device 10 also comprises (referring to Fig. 2-5,8,9) ring-shaped sleeve 70 that is fixed in substrate 30 centers usually, the opening that has air intake 72 and burner assembly to pass through on the ring-shaped sleeve 70.Ring-shaped sleeve 70 is used for supporting heating water tank, creates the combustion space, and the combustion air opening is provided, and allows near burner and combustion space.

Emission shield 74 (see figure 9)s are arranged in the substrate 30 of ring-shaped sleeve 70.Design emission shield 74 be used for shielding from burner radiant energy, thereby the ground plate temperature is minimized.Emission shield 74 is plate-likes, to collect condensation product.Footing can be installed in bottom at emission shield, leaves the distance of 14 bottoms, operating room with adjusting.With following burner keeper together, emission shield 74 also can be adjusted the height of burner.

On emission shield 74, connecting an inner annular sleeve 76.Design inner annular sleeve 76 allows circulation of air to cross the top and the bottom of inner annular sleeve 76, prevents that simultaneously radiation from passing through the combustion air opening 72 on the ring-shaped sleeve 70.This makes minimumization of temperature of operating room.

Water tank 78 is arranged on ring-shaped sleeve 70 tops, thereby constitutes burner space 82 with ring-shaped sleeve 70 inside below water tank 78.Water tank 78 preferably highly is approximately 48 inches, and diameter is 12 inches.In this used, circulating hot water was stored in the water tank 78.Because hot water in closed system, belongs to " stagnant water " (seldom oxygen), thereby 78 corrosion of steel water tank seldom.Therefore, do not need glass-lined usually.Water tank 78 comprises drinking water inlet 86 (Fig. 4), drinking water outlet 90 (Fig. 4), recirculated water inlet 94 (Fig. 1), a circulating water outlet 98 (Fig. 1,4), a water tank relief outlet 102 (Fig. 1) and draining valve outlet 106 (Fig. 1).Draining valve 110 and draining valve outlet 106 communicate.Preferably make water tank 78 thermal insulation by the thick fiberglass packing 112 of 3 ＂ that are covered with vinyl.This thermal insulation preferably has the specified adiabatic factor of R-10.

General flue 114 vertical, drum type brake extends through water tank 78, thereby is formed in the water tank 78 inner and flue 114 outside recirculated water operating rooms 118 that form.Flue 114 preferably has about 5 inches diameter.Flue 114 preferably extends through shelf 38, and the upper end of flue 114 is fixed on correct position by shelf 38 as a result.The lower end of flue 114 and burner space 82 communicate.A dividing plate 120 (referring to Fig. 4,5) is arranged in flue 114.Dividing plate 120 is preferably strand shape dividing plate, each flat position welding blade in the both sides of dividing plate 120.Dividing plate 120 is suspended in the notch at flue 114 tops.Recommend to use stainless steel or other high-temperature material to make the bottom or the whole dividing plate of dividing plate.

Device 10 also comprises (referring to Fig. 5,9,11-13 and 16) burner assembly 121, and this burner assembly 121 comprises a gas burner 122 that is arranged in the burner space 82 of flue 114 lower ends.Burner assembly 121 enters by the opening on the ring-shaped sleeve 70 73, and burner door 124 (seeing Fig. 2,5) is closed opening 73.Shown burner 122 especially is fit to use the manufactured gas, manufactured fuel gas.Burner 122 has a cylindrical portions may 126 (referring to Figure 11-13) usually, and its center is on the central axis of flue 114, and cylindrical portions may 126 has an inner space 130 (Figure 13).Burner 122 has a frustoconical part 134 on cylindrical portions may 126 tops.Frustoconical part 134 has some holes 138 outside and positive pitch, the outer surface of linking up inner space 130 and frustoconical part 134.Hole 138 evenly is distributed on the frustoconical part 134, and has interval (preferably as shown in figure 12) between the hole of per 90 degree.In burner operation just often, the flame of burner 122 can not impact any outer surface of flue 114, as water tank 78 bottom surfaces or bottom.As shown in figure 16, irregular spacing, promptly the interval between the hole 138 allows air to be drawn into burner flame 140 centers on the burner 122.This causes improving the mixing of air and fuel, reduces the temperature of recirculation and bottom and reduces the deposition of carbon on burner 122.

With reference to Figure 12,13, there are several variablees to influence the performance of burner.The angle in hole 138 " A " has determined the direction of the fuel gas injection that exhales from burner 122.The fuel gas injection direction changes the shape and the size of flame modes.Angle " A " can change to 90 degree, the bigger less flame diameter of angle generation from 0.When 0 spent, horizontal-jet produced maximum flame diameter.When 90 spent, the vertical injection produced minimum flame diameter.Usually, need the angular range of 30～60 degree more satisfactory.The diameter in the number of burner aperture 138 and each hole 138 is in given combustion gas and pressure its peak power output of having made decision.Can change them and change the mode of combustion gas and air mixed combustion and the shape of flame.Generally, the higher gas-flow speed of 138 outputs can make air and combustion gas mix preferably from the hole.The diameter that comes selecting hole according to the number and the power output in hole 138.These holes do not have burr, and preferably do not carry out chamfering.

Burner assembly 121 also comprises the gas pipeline 142 (Fig. 5,9) that the inner space 130 of its port of export and burner 122 is connected.Gas pipeline 142 is supported by the part 144 that is fixed on the emission shield 74, and burner 122 is fixing with respect to flue 114 like this.Burner 122 obtains suitable fixing very important, and flame needn't contact with flue 114 like this.Gas pipeline 142 has an arrival end, and this arrival end links to each other with gas source via gas valve 146, gas pipeline 148 and the first end plate joint 61.Gas valve 146 is preferably made by White Rogers.Thermosistor 150 (seeing Fig. 3,5) is installed in water tank 78 outsides, but and links to each other with gas valve 146 with mode of operation by ignition module 154.Ignition module 154 is HoneywellS8600M preferably.Thermosistor 150 is preferably set and is kept about 85 ℃ of water temperature, and this is very important to the circulation heating.The high limit switch 155 (schematically illustrating at Fig. 7,10) that install on the hand-reset surface preferably is positioned at the side of water tank 78, controls the highest water temperature at 90 ℃.When thermosistor required heat supply, system's start-up control valve also carried out spark ignition.When indicator lamp was lighted and detect flame, gas valve 146 was opened.

Burner assembly 121 also comprises (see figure 9) control electrode assembly 156, and this control electrode assembly 156 is Johnson Controls J984DDW preferably.Also can use other control structure, but its selection can not influence the flame or the burning of main burner.

Be particularly suitable for using natural gas burning device 122a to be shown in Figure 14,15.Burner 122a is different from burner 122 parts and is to have increased a deflector 157 on hole 138.And other part provides identical label.

A T-shape pipeline 158 (Fig. 2,3) has been installed on the upper end of the flue on the shelf 38 114.T-shape pipeline 158 have below that one and flue 114 upper ends communicate or flue discharging gas enter the mouth 160 (see figure 4)s, ambient air inlet 162 that communicates with upper space 42, also have a discharging gas/surrounding air mixed gas outlet 164 that enters the mouth and communicate with exhaust blower 166.The CO/CO that inlet 162 fixed air flow measurement holes preferably, its size are set in the combustion testing during by overfire ₂The limiting value decision.Discharging feed channel 170 has one and exhaust blower outlet inlet communicating.Pipeline 170 extends through the roof 34 of operating room 14 and the wall wall 172 of building, and this pipeline also has an outlet that communicates with atmosphere.T-shape pipeline 158 mixes cold air and flue discharging gas, and the result makes colder relatively gas by pipeline 170.In the another kind structure (not illustrating), can utilize bend pipe (not having ambient air inlet 162) to replace T-shape pipeline 158, and flue 114 on shelf 38 opening is arranged so that surrounding air cooling stack discharging gas.

Air enters pipeline 174 and extends through the wall wall 172 of building and one and atmosphere inlet communicating are arranged.Air enters pipeline 174 and also extends through roof 34 and shelf 38, and as shown in figs. 1 and 3, also has an outlet 176 that communicates with near the lower space 46 of ring-shaped sleeve 70.Settle near ring-shaped sleeve 70 outlets 176 to improve to burner 122 supply air.Otherwise air may be sucked out by T-shape pipeline 158, thereby hinders burning.

Device 10 also comprises a pressure switch 178 that communicates with exhaust blower 166, gas valve 146, is used for closing when the pressure of exhaust blower 166 is lower than setting value gas valve.Pressure switch 178 is installed on shelf 38 tops.Usually, the installation of part all is beneficial to the maintenance and the maintenance of device on shelf 38.On shelf 38 tops a water pump 182 is installed also.Water pump 182 (Fig. 3) have one via the circulating water outlet 98 of air air outlet valve 186 and water tank 78 with recirculated water operating room 118 inlet communicating 184.Water pump 182 also has an outlet 188 that communicates with end plate joint 66 via circulating water outlet pipeline 190.

Gas relief line 194 is connected between the water tank relief outlet 102 and end plate joint 62 of water tank.There is a pressure-reducing valve 198 gas relief line 194 inside and communicates with break pressure cistern 202 above being installed in shelf 38.Recirculated water inlet duct 206 is connected between end plate joint 65 and the recirculated water operating room 118 via the recirculated water inlet 94 of water tank 78.There is a family of power and influence 210 recirculated water inlet duct 206 (seeing Fig. 1,2) inside, is used for opening or closing circulating water pipeline near the recirculated water inlet 94 of water tank 78.

Automatically water injection valve 214 (see figure 2)s have an outlet 216 that communicates with recirculated water inlet duct 206 between the family of power and influence 210 and end plate joint 65.Automatically water injection valve 214 has one via pipeline 218 and end plate joint 63 inlet communicating 217.Like this, when the hydraulic pressure of loop heating system was lower than setting value, water injection valve 214 can the supply additional water enter loop heating system automatically.Most of circulations can be owing to evaporation or the leakage located at valve, water pump packing, air vent etc. produce a spot of water loss.For keeping the pressure of system, must replace water.Automatically the purpose of water injection valve use just is being this.This class valve has many companies to provide.

Device 10 comprises that also (see figure 4) spiral in recirculated water operating room 118 centers on the drinking water pipeline 220 of flue 114.Spiral drinking water pipeline 220 has an arrival end 222 that extends through the drinking water inlet 86 of water tank 78, and a port of export 226 that extends through the drinking water outlet 90 of water tank 78 is arranged.Also has an isolator 230 that is used for keeping the helix pitch of pipeline 220 in the delivery transportation.This isolator 230 is fixed on the flue 114 to keep the position of pipeline 220 with respect to flue 114.

Existing mixing valve 234 (see figure 2) have hot water inlet's 240 (see figure 1)s that cooling water outlet that a cold water inlet that communicates via the arm and the end plate joint 63 of pipeline 218 235, one communicate via cold water pipes 238 and helical pipe arrival end 222 236, one communicate via the hot water pipeline 241 and the helical pipe port of export 226, also have a hot water that communicates via pipeline 244 and end plate joint 64 to export 242 with cold water mix.Can omit mixing valve in other embodiments of the invention.

As shown in Figure 6, a special joint 246 that connects cold water pipes 238 and helical pipe arrival end 222 is arranged.This special joint 246 comprises an external screw thread spud 250 on the water tank drinking water inlet 86 that is installed in outside the water tank 78.The outer end of this spud 250 has interior chamfering 254.The inlet end 222 of helical pipe extends through spud 250, and this special joint 246 also comprises the sealing shroud 258 around helical pipe inlet end 222, and its interior section be threaded onto on the spud 250, around adapter piece 262 sealing shroud 258 and that interior chamfering 266 is arranged.Sealing shroud 258 is compacted between these two chamferings 254,266, and sealing shroud 258 seals around helical pipe inlet end 222 as a result, and has sealed spud 250 and adapter piece 262, thereby helical pipe inlet end 222 seals with respect to water tank 78.Adapter piece 262 also has an exterior section, by joint 270 and cap nut cold water pipes 238 is tightly connected.Cold water pipes 238 is sealedly connected with helical pipe inlet end 222 like this.The internal diameter of cold water pipes 238 is bigger than the external diameter of helical pipe inlet end 222, like this if helical pipe end 222 extends beyond 262 of adapter pieces and can extend to (Fig. 6) in the cold water pipes 238.Identical substantially special joint 246 (Fig. 4) is sealedly connected hot water pipeline 241 with helical pipe outlet end 226.

Automatically water injection valve 214 is pressure regulators that have partial pressure valve.Under system's normal operation condition, if existing, the circulatory system leaks, then valve can keep system pressure constant substantially.Automatically water injection valve 214 also has the setting value through its pressure regulator overflow, so that system can fill with water rapidly.When the empty and water source of water tank was at first opened, owing to have gas pressure in water tank operating room 118 and circulating line inside, water injection valve 214 can make in the water inflow system automatically.When system starts, the 118 beginning water fillings of water tank operating room, and air escapes into the upstream of water pump 182 by air air outlet valve 186.When water level arrived the top of water tank, water level rose float and closes air air outlet valve 186.Water tank is full now.If water level surpasses desired location, be generally 30psi, pressure-reducing valve 198 can drain water so.This water level is too high may to be caused owing to too high water temperature or the too high hydraulic pressure when automatically quick water filling of water injection valve or the overflow.

, common meeting residual a considerable amount of air (in Fig. 1, schematically representing) in the heat supply pipeline of radiator by label 300.These residual airs can produce and hinder the gas lock that recirculated water enters system.Can open the air venthole on the radiator, the water that still enters automatic water injection valve 214 can be selected the path of resistance minimum, promptly tends to enter water tank, and oppositely by the pressure-reducing valve 186 rather than the reverse circulatory system that enters.Water is upwards by water tank, and water is not to make it along other direction by system by water pump 182 and impinging air, but leaves pressure-reducing valve 198.

The family of power and influence 210 has solved this problem.The family of power and influence 210 is arranged between automatic water injection valve 214 and the water tank 78, and the family of power and influence 210 directly links to each other with water tank 78, and links to each other with automatic water injection valve 214 at opposite side.Recirculated water inlet duct 206 is connected between the automatic water injection valve 214 and the family of power and influence 210.In case water tank is full of water and air is discharged from water tank fully, then the family of power and influence 210 closes.This can prevent that sealing enters water tank by recirculated water inlet duct 206, prevents that wet concentration from selecting the path of resistance minimum and leave by pressure-reducing valve 198.Water must flow through radiator system now, and water promotes most of or all air pass through water pump 182.Air runs into air air outlet valve 186 herein, and wherein this air air outlet valve 186 vertically is arranged in the extreme higher position of system.Can get rid of abundant air like this with the gas lock in the elimination system.Water pump 182 circulates water, and any additional air can be emitted by air air outlet valve 186.

Two on-off switches 304 and 308 (Fig. 3,7,10) are arranged on panel 56.The power of switch 304 control device 10.When switch 304 was connected, water heater can be worked and drinking water is heated.Switch 308 is handled the circulatory system.When switch 304 and switch 308 are all connected, and when thermosistor required heat, water pump 182 can work.Lamp was bright when these switches were preferably in connection.On panel 56, also arrange an indicator lamp 312, be used to refer to the operation of burner.

Further feature of the present invention is listed in the appending claims.

Claims (25)

1. combined drinking-water heater and loop heating system, it comprises:

A water tank that holds circulating hot water;

A flue that extends through water tank;

Burner below flue is so that heat that is produced by burner and emission gases are by the water in this flue heating water tank; And

A drinking water container that is installed in the water tank, so that the water in the circulating hot water heating drinking water container, and recirculated water and drinking water are separated.

2. the system as claimed in claim 1 is characterized in that also comprising a ring-shaped sleeve that is fixed in the substrate center usually, air intake is arranged on the ring-shaped sleeve, and burner is arranged in ring-shaped sleeve.

3. system as claimed in claim 2 is characterized in that water tank is located on the ring-shaped sleeve top, so that constitute burner space with ring-shaped sleeve inside below water tank.

4. the system as claimed in claim 1 is characterized in that also comprising an operating room that water tank is installed therein.

5. system as claimed in claim 4 is characterized in that this operating room comprises a common vertical rear wall; Extend forward from the relative both sides of rear wall, common parallel to each other, vertical sidewall substantially; The substrate of extension and the common level between the two side forward from the rear wall bottom; One is extended forward from the rear wall top and the roof of the common level between the two side; One is extended forward and the shelf of common level between the two side from rear wall, thereby forms a upper space between shelf and roof, forms a lower space between shelf and substrate; One is used for closing the to the doorstep detachable of upper space front; And detachable Xiamen that is used for closing the lower space front; Wherein water tank is arranged in lower space.

6. system as claimed in claim 5, it is characterized in that also comprising one common vertical, in the rear wall of operating room, be fixed on suprabasil end plate, end plate comprises the first, second, third, fourth, the 5th and the 6th water or the gas joint that extends through operating room's rear wall respectively, first joint links to each other with gas source, second joint is a relief outlet, the 3rd joint is the drinking water inlet, the 4th joint is the drinking water outlet, the 5th joint is the circulating hot water inlet, and the 6th joint is the circulating hot water outlet.

7. system as claimed in claim 5 is characterized in that flue extends through shelf, so that the upper end of flue is located by shelf.

8. system as claimed in claim 5, it is characterized in that also comprising a T-shape pipeline that is installed in the flue upper end on the shelf, T-shape pipeline has the flue discharging gas inlet, an ambient air inlet that communicates with upper space and the flue discharging gas/surrounding air mixed gas outlet that communicate with the flue upper end.

9. system as claimed in claim 8 is characterized in that also comprising an exhaust blower, and this exhaust blower has one and flue discharging gas/surrounding air mixed gas outlet inlet communicating; And the discharging feed channel that its inlet communicates with the exhaust blower outlet, this discharging feed channel extends through the roof of operating room, and an outlet that communicates with atmosphere is arranged.

10. system as claimed in claim 9 it is characterized in that the gas pipeline that comprises that also its port of export and burner communicate, and this gas pipeline has an arrival end that is connected with gas source via gas valve; But also comprise its working condition that links to each other with exhaust blower and detect and be connected with gas valve and when the pressure of exhaust blower is lower than setting value, close the pressure switch of gas valve.

11. system as claimed in claim 5, it is characterized in that also comprising that an air that extends through roof and shelf enters pipeline, this air enter pipeline have one with the atmosphere inlet communicating, and this air enters pipeline and also has an outlet that communicates with near the lower space of burner.

12. system as claimed in claim 5 is characterized in that also comprising installation water pump on the shelf, this water pump has one via air air outlet valve and water tank inlet communicating.

13. the system as claimed in claim 1 is characterized in that described drinking water container is a heat exchanger.

14. system as claimed in claim 13 is characterized in that described heat exchanger comprises a helical pipe around flue.

15. system as claimed in claim 14 is characterized in that also comprising an isolator that is used for keeping in the delivery transportation helix pitch of helical pipe, this isolator is fixed on the flue.

16. system as claimed in claim 14, it is characterized in that also comprising a mixing valve, this mixing valve has hot water inlet that cooling water outlet that cold water inlet that one and water source communicate, one communicate via cold water pipes and helical pipe arrival end, one communicate via the hot water pipeline and the helical pipe port of export, also has hot water and cold water mix to export.

17. system as claimed in claim 16 is characterized in that also comprising being used for respectively special joint that cold water pipes or hot water pipeline are coupled together with the helical pipe arrival end or the helical pipe port of export; This special joint comprises that is installed in the outer external screw thread spud of water tank, and the outer end of this spud has interior chamfering, and the end of helical pipe extends through spud; And this special joint also comprise around the sealing shroud of helical pipe end and its interior section be threaded onto on the spud, around adapter piece sealing shroud and that have interior chamfering, sealing shroud is compacted between these two chamferings, so that sealing ring is around the sealing of the end of helical pipe, and sealed spud and adapter piece, thereby get up with respect to tank seal in the end of helical pipe; Adapter piece also has an exterior section, is tightly connected with ventilating water pipe, and ventilating water pipe is sealedly connected with the helical pipe end like this; The internal diameter of cold water pipes is bigger than the external diameter of helical pipe end, like this if the helical pipe end extends beyond adapter piece and then can extend in the ventilating water pipe.

18. the system as claimed in claim 1 is characterized in that described water tank comprises a drinking water inlet, a drinking water outlet, a recirculated water inlet, a break pressure cistern outlet and a draining valve outlet.

19. the system as claimed in claim 1 is characterized in that also comprising a dividing plate that is arranged in flue.

20. the system as claimed in claim 1 it is characterized in that described burner has the cylindrical portions may of its center on the central axis of flue usually, and this cylindrical portions may has an inner space; Burner also has a frustoconical part on cylindrical portions may, this frustoconical partly have some outer surfaces that are used for being communicated with above-mentioned inner space and frustoconical part, outwards and the hole of positive pitch, these holes evenly are distributed on the frustoconical part, and exist at interval between the hole of per 90 degree.

21. the system as claimed in claim 1 it is characterized in that the gas pipeline that comprises that also its port of export communicates with burner, and this gas pipeline is fixed so that burner is fixed with respect to flue with respect to water tank.

22. the system as claimed in claim 1 is characterized in that described water tank has recirculated water inlet, and also comprises the family of power and influence that and recirculated water inlet communicate.

23. the system as claimed in claim 22, it is characterized in that also comprising the automatic water injection valve that its outlet and recirculated water enter the mouth and communicates, this automatic water injection valve has and the water source inlet communicating, like this, when the hydraulic pressure of loop heating system was lower than setting value, water injection valve can be supplied additional water and enter loop heating system automatically.

24. a water heater comprises:

A water tank;

A flue that extends through water tank;

Burner below flue, heat that is produced by burner and emission gases are by the water in this flue heating water tank like this;

Screw type heat exchanger and a waterpipe around flue, the water in the circulating hot water reheat heat exchanger as a result, heat exchanger has helix tube;

An isolator that is used for keeping in the delivery transportation helix pitch of helical pipe, this isolator is fixed on the flue.

25. a water heater comprises:

A water tank;

External pipe with end;

Internal pipeline in water tank, the external diameter of this internal pipeline is less than the internal diameter of external pipe;

A special joint, it comprises that is installed in the outer external screw thread spud of water tank, the outer end of this spud has interior chamfering, so that the end of internal pipeline extends through spud; One around the sealing shroud of internal pipeline end and its interior section be threaded onto on the spud, around adapter piece sealing shroud and that have interior chamfering, sealing shroud is compacted between these two chamferings, thereby sealing ring is around the sealing of the end of internal pipeline, and sealed spud and adapter piece, thereby get up with respect to tank seal in the end of interior conduit; Adapter piece also has an exterior section, is tightly connected with external pipe, and external pipe is sealedly connected with the internal pipeline end like this; Like this if the internal pipeline end extends beyond adapter piece and then can extend in the external pipe.

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