CN2709856Y

CN2709856Y - Water-storage water heater

Info

Publication number: CN2709856Y
Application number: CN 200420046781
Authority: CN
Inventors: 麦广海
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-03
Filing date: 2004-06-03
Publication date: 2005-07-13
Anticipated expiration: 2014-06-03

Abstract

The utility model relates to a water-storage water heater which has the advantages of easy and safe utilization, long service life, and comprises a water tank, an expander, a discharge valve, an overflow pipe, a cold water pipe, a hot water pipe and an admitting pipe. The water-storage water heater is characterized in that the discharge valve is a mixing faucet whose hot water inlet is connected to the hot water pipe, and the cold water inlet of the mixing faucet is connected with a siphoneum. Control blocks are connected with the expansion wall of the expander, which makes the blocks motion with the wall, with the inner cavity of the expander being communicated with the siphoneum. An inlet valve is provided between the siphoneum and the admitting pipe, and a control flap is provided between the siphoneum and the cold water pipe, with a spilling water valve being arranged between the cold water pipe and the overflow pipe. The inlet valve, control flap, and spilling water valve are controlled by the respective switch block, with the switch blocks being linked with the control blocks.

Description

The storage water heater

Technical field

The utility model relates to a kind of water heater, particularly a kind of storage water heater.

Background technology

The water-storage electric heater that existing family or hotel guest-room are used, the pyrogenicity element that comprises water tank, temperature control element, the water in the water tank is heated (as electrothermal tube, electromagnetic field eddy-current heating body---utilize principle, the microwave generator of electromagnetic stove---principle of utilizing micro-wave oven to water heat, the hot system of refrigerant system---the reverse work of refrigeration system is about to the condenser of refrigeration system as heater), during normality, running water pipe, water tank, hot-water line, tap constitute an obturator, and hot-water line can join to realize that central authorities supply water with a plurality of taps; The tap of fetching boiling water during use extrudes water under the hydraulic pressure effect of the hot water in the water tank in running water pipe through tap; The advantage of this closed electrical water heater is to realize that remote central authorities supply water, but shortcoming is short a, poor stability of life-span, reason is that water tank bears high hydraulic pressure for a long time, metal water tank under the HTHP effect very easily by corrosion, thereby shortened its life-span, and can blast when too high or temperature controller is malfunctioning, and cause danger when hydraulic pressure.

Summary of the invention

The purpose of this utility model is in order to solve the problem of short, poor stability of the life-span that exists among the existing storage water heater, and a kind of easy to use, safe, storage water heater that the life-span is long is provided.

Technical scheme:

First technical scheme that realizes the utility model purpose is: a kind of storage water heater, comprise water tank, expander, outlet valve, overflow pipe, cold water pipe, hot-water line and water inlet pipe, wherein hot and cold water pipe communicates with water tank respectively, water inlet pipe communicates with running water pipe, it is characterized in that described outlet valve is for mixing water valve, the hot water inlet that should mix water valve connects described hot-water line, and the cooling water inlet that mixes water valve is connected to connecting leg; The expansion wall of expander is connected with controll block, and controll block is moved with expansion wall, and the expander inner chamber communicates with described connecting leg; Be provided with inlet valve between described connecting leg and the water inlet pipe, be provided with by-pass valve control between connecting leg and the cold water pipe, be provided with the spilling water valve between cold water pipe and the overflow pipe; Described inlet valve, by-pass valve control, spilling water valve are controlled by switch block separately respectively, each switch block and the interlock of described controll block; Open when mixing water valve, the water of expander inner chamber flows out through mixing water valve, expander shrinks because of interior drops, controll block moves down, thereby driving each switch block rotates, the sequence of movement of each valve is: (have only one road running water through water inlet pipe this moment to open inlet valve gradually, inlet valve, connecting leg, mixing water valve flows out, be the cold water road, because of the opening of inlet valve less, be not enough to replenish through mixing the water yield that water valve flows out, controll block continues to move down)---close the spilling water valve---opening by-pass valve control---open fully inlet valve (this moment another road running water appears through water inlet pipe, inlet valve, connecting leg, by-pass valve control, cold water pipe enters water tank, hot water in the water tank flows into the hot water inlet that mixes water valve through hot-water line, be the hot water road, mix with above-mentioned cold water road on the hot water road after the use for the user is flowed out in the outlet of mixed water valve), at this moment, the openings of sizes of inlet valve is relevant with mixed water valve water yield, water yield greatly then presses continuation to reduce in the expander, controll block continues to move down the opening that makes inlet valve and increases, press in the little then expander of water yield and increase, move on the controll block and make the inlet valve openings get smaller, thereby the hydraulic pressure that makes water tank and expander inner chamber is controlled in the less range hydraulic pressure, and this range hydraulic pressure is determined by the reset force of expander expansion wall and the malleation area of expansion wall; Close when mixing water valve, also be closed between hot-water line and the connecting leg, the water that enters the expander inner chamber through inlet valve makes to press in the expander and increases rapidly and expand, move on the controll block, thereby drive each switch block counter-rotating, the sequence of movement of each valve is: the opening of inlet valve diminishes rapidly, and---closing control valve---is opened the spilling water valve---and is closed inlet valve fully, controll block is moved on stopping, at this moment, water tank is through cold water pipe, the spilling water valve, overflow pipe communicates with atmosphere, if the water in the water tank then can be through the spilling water valve because of expanded by heating, overflow pipe overflows, and makes water tank be operated in the open type state.

Described storage water heater is characterized in that described controll block is provided with tooth bar, described each switch block be provided with controll block on the mutually meshing tooth of tooth bar.

Described storage water heater is characterized in that described by-pass valve control and spilling water valve are arranged in the switching valve, and this switching valve uses a switch block.

Described storage water heater is characterized in that described inlet valve, by-pass valve control and spilling water valve are arranged in the switching valve, and this switching valve uses a switch block.

Described storage water heater is characterized in that described expander is a ball.

Described storage water heater is characterized in that described expander is made up of lower casing, upper casing, diaphragm, and diaphragm is sandwiched between upper casing and the lower casing, constitutes the inner chamber of expander between diaphragm and the lower casing, constitutes the air cavity of sealing between diaphragm and the upper casing.When chamber pressure during greater than air cavity pressure, diaphragm is to the motion of air cavity direction, otherwise opposite.

Second technical scheme that realizes the utility model purpose is: a kind of storage water heater, comprise water tank, expander, outlet valve, overflow pipe, cold water pipe, hot-water line and water inlet pipe, wherein hot and cold water pipe communicates with water tank respectively, water inlet pipe communicates with running water pipe, the water inlet that it is characterized in that described outlet valve is connected to mixed water pipe, should mix to be connected between water pipe and the described hot-water line flowing to the check valve that mixes the water pipe direction, also be connected to the tapping pipe that communicates with connecting leg on this mixed water pipe; The expansion wall of expander is connected with controll block, and controll block is moved with expansion wall, and the expander inner chamber communicates with described connecting leg; Be provided with inlet valve between described connecting leg and the water inlet pipe, be provided with by-pass valve control between connecting leg and the cold water pipe, be provided with the spilling water valve between cold water pipe and the overflow pipe; Described inlet valve, by-pass valve control, spilling water valve are controlled by switch block separately respectively, each switch block and the interlock of described controll block; When opening outlet valve, the water of expander inner chamber is through connecting leg, tapping pipe, mix water pipe, outlet valve flows out, expander shrinks because of interior drops, controll block moves down, thereby driving each switch block rotates, the sequence of movement of each valve is: (have only one road running water through water inlet pipe this moment to open inlet valve gradually, inlet valve, connecting leg, tapping pipe, mixed water pipe flows to the water inlet of outlet valve, be the cold water road, because of the opening of inlet valve less, be not enough to replenish the water yield that flows out through outlet valve, controll block continues to move down)---close the spilling water valve---opening by-pass valve control---open fully inlet valve (this moment another road running water appears through water inlet pipe, inlet valve, connecting leg, by-pass valve control, cold water pipe enters water tank, hot water in the water tank is through hot-water line, check valve, mixed water pipe flows to the import of outlet valve, be the hot water road, mix in mixing water pipe after the use for the user is flowed out in the outlet of outlet valve with above-mentioned cold water road on the hot water road), at this moment, the openings of sizes of inlet valve is relevant with the outlet valve water yield, water yield greatly then presses continuation to reduce in the expander, controll block continues to move down the opening that makes inlet valve and increases, press in the little then expander of water yield and increase, move on the controll block and make the inlet valve openings get smaller, thereby the hydraulic pressure that makes water tank and expander inner chamber is controlled in the less range hydraulic pressure, and this range hydraulic pressure is determined by the reset force of expander expansion wall and the malleation area of expansion wall; When closing outlet valve, the water that enters the expander inner chamber through inlet valve makes to press in the expander and increases rapidly and expand, move on the controll block, thereby drive each switch block counter-rotating, the sequence of movement of each valve is: the opening of inlet valve diminishes rapidly, and---closing control valve---is opened the spilling water valve---and is closed inlet valve fully, controll block is moved on stopping, at this moment, water tank communicates with atmosphere through cold water pipe, spilling water valve, overflow pipe, if the water in the water tank is because of expanded by heating, then can overflow, make water tank be operated in the open type state through spilling water valve, overflow pipe.

Described storage water heater is characterized in that the minimum sluicing bore of described tapping pipe is not more than the hot water channel's of the connecting leg of flowing through, by-pass valve control, cold water pipe, water tank, hot-water line, check valve lowest calibre.In order to avoid tapping pipe causes the short circuit in water route and can not go out hot water the hot water channel.

Expander described in the utility model can be a prior art, also discloses a kind of " bellows-type expander " in October 4 nineteen ninety-five among the disclosed Chinese patent bulletin CN2209380Y; Expansion wall wherein described in the utility model is meant a wherein wall of expander, during this wall motion the volume of expander is changed.

Beneficial effect:

Owing to adopted technical scheme described in the utility model, the storage water heater is when not water outlet, water tank communicates with atmosphere, water tank becomes pressure-bearing duty in short-term by original long-term pressure-bearing duty, and the hydraulic pressure when its water outlet is to be determined by the reset force of expander expansion wall and the malleation area of expansion wall, so, pressure design in the time of the water tank pressure-bearing can being worked is in lower scope, make water tank be unlikely to long-term work at high pressure conditions, water tank is difficult for by corrosion, prolong the service life of water tank, improve its security performance; Though this storage water heater is the open type state when not water outlet, can realize that equally central authorities supply water, so, long, safety of life-span not only, and easy to use, simple in structure.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of storage water heater embodiment one described in the utility model.

Fig. 2 is the structural representation of storage water heater embodiment two described in the utility model.

Fig. 3 is the structural representation of storage water heater embodiment three described in the utility model.

Fig. 4 be expander among Fig. 3 along A---the profile of A line.

Fig. 5 is another state diagram in expander when action among Fig. 4.

Fig. 6 is the internal structure schematic diagram of another expander used among Fig. 3 embodiment.

Fig. 7 is the outward appearance zoomed-in view of the still that switching valve uses among the embodiment three.

Fig. 8 is the outside drawing with the supporting moving plate of Fig. 7.

Fig. 9 is the outward appearance zoomed-in view of the still that stop valve uses among the embodiment three.

Figure 10 is the outside drawing with the supporting moving plate of Fig. 9.

Among the figure 21, expander, 24, switch block, 28, overflow pipe, 241, cold water pipe, 23, controll block, 27, water tank, 262, hot-water line, 22, water inlet pipe, 25, stop valve, 251, connecting leg, 26, mix water valve, 261, outlet pipe; 38, overflow pipe, 34, switch block, 331, the top, 31, expander, 36, mix water valve, 361, check valve, 362, hot-water line, 363, pipe, 368, connecting leg, 369, outlet pipe, 35, switch block, 32, water inlet pipe, 33, controll block, 37, water tank; 441, cold water pipe, 48, overflow pipe, 9, switching valve, 451, connecting leg, 452, tapping pipe, 461, outlet pipe, 46, outlet valve, 42, water inlet pipe, 1, stop valve, 464, mix water pipe, 43, expander, 463, check valve, 462, hot-water line, 47, water tank; 510, inner chamber, 51, shell, 54, switch block, 52, diaphragm, 53, bearing, 58, screw, 57, spring, 531, spine, 55, switch block, 56, controll block, 511, the feed water inlet; 61, lower casing, 610, inner chamber, 65, switch block, 62, baffle plate, 621, through hole, 64, upper casing, 63, diaphragm, 640, air cavity, 66, switch block, 611, the feed water inlet, 67, controll block; 91, still, 94, cold water channel, 95, the connecting leg passage, 98, the spilling water passage; 92, moving plate, 921, groove; 11, still, 111, intake tunnel, 112, stern notch; 12, moving plate, 121, the inlet opening.

The specific embodiment:

Embodiment one, Fig. 1 are the structural representations of storage water heater embodiment one described in the utility model.Belong to first technical scheme, as can be seen from Fig. 1, described storage water heater comprises water tank 27, expander 23, mixes water valve 26, overflow pipe 28, cold water pipe 241, hot-water line 262 and water inlet pipe 22, the hot water inlet that mixes water valve 26 connects hot-water line 262, and the cooling water inlet that mixes water valve is connected to connecting leg 251; The outer side of expanding wall of expander 21 is connected with controll block 23, makes controll block 23 with the expansion wall motion, and controll block 23 both sides are provided with tooth bar, and the expander inner chamber communicates with connecting leg 251; Be provided with inlet valve between connecting leg 251 and the water inlet pipe 22, the switch block 25 of control inlet valve switch be one with controll block 23 on the gear that matches of tooth bar; By-pass valve control and spilling water valve are arranged in the switching valve, and this switching valve uses a switch block 24, switch block 24 for controll block 23 another sides on the gear that matches of tooth bar.Open when mixing water valve 26, the water of expander 21 inner chambers is through mixing water valve and outlet pipe 261 outflows, expander is because of interior drops, controll block 23 moves down, thereby driving switch block 24 and 25 rotates, the sequence of movement of each valve is: (have only one road running water through water inlet pipe 22 this moment to open inlet valve gradually, inlet valve, connecting leg 251, mix water valve 26, outlet pipe 261 flows out, be the cold water road)---close the spilling water valve---opening by-pass valve control---open fully inlet valve (this moment another road running water appears through water inlet pipe 22, inlet valve, connecting leg 251, by-pass valve control, cold water pipe 241 enters water tank 27, hot water in the water tank flows into the hot water inlet that mixes water valve 26 through hot-water line 262, mixes with above-mentioned cold water road after the outlet outflow that mixes on the water valve outlet pipe 261 is used for the user); Close when mixing water valve, also be closed between hot-water line 262 and the connecting leg 251, the water that enters the expander inner chamber through inlet valve makes to press in the expander and increases rapidly and expand, move on the controll block 23, thereby drive switch block 24 and 25 counter-rotatings, the sequence of movement of each valve is: the opening of inlet valve diminishes rapidly, and---closing control valve---is opened the spilling water valve---and is closed inlet valve fully, on stopping, controll block 23 moves, at this moment, water tank communicates with atmosphere through cold water pipe 241, spilling water valve, overflow pipe 28.A plurality of mixed water valves in parallel can realize that central authorities supply water on connecting leg 251 and hot-water line 262.

In the present embodiment by-pass valve control and spilling water valve are synthesized the switching valve of a shared switch block 24, inlet valve uses a switch block 25 separately, rather than by-pass valve control, spilling water valve, inlet valve three be synthesized together, be for make switching valve be easy to produce.Wherein the structure of still in switching valve and the water intaking valve and moving plate can be referring to the Fig. 7 that discusses later, Fig. 8, Fig. 9, Figure 10.

When the mixed water valve 26 of present embodiment cuts out, be that the hot and cold water inlet between connecting leg 251 and the hot-water line 262 is cut off; If add a check valve that flow to mix the water valve direction between hot-water line 262 and mixed water valve, the structure that then should mix water valve also can be need not cut off the hot and cold water inlet who mixes water valve in off position the time.Certainly, because the opening action of check valve, be actually by opening in the switching valve to increase behind the by-pass valve control and press in the water tank and it is backed down, so, opening of check valve can think synchronous with opening of by-pass valve control, therefore can on switching valve, increase by one and replace check valve with the synchronous valve of by-pass valve control, this is that those skilled in the art are all attainable on the utility model basis, and be a kind of simple replacement on the utility model basis, be comprised in the scope of the present utility model.

Embodiment two, Fig. 2 are the structural representations of storage water heater embodiment two described in the utility model.Compare with embodiment one, expander 31 among the embodiment two is a ball, this ball is placed in the spacing bucket, the top 331 that controll block 33 lower ends are provided with sphere is used to withstand ball, in the expander during drops, controll block can be leaned on self gravitation or at the controll block upside the downward spring of elastic force is set and realize moving down, and its operating principle is identical with embodiment one; Between hot water inlet that mixes water valve 36 and hot-water line 362, check valve 361 is set in addition, so, when the mixed water valve 36 of embodiment two cuts out, the pipe 363 with expander 31 between can communicate, its benefit is to mix water valve 36 to can be designed as the mixed water valve of the electric operated thermostatic that is built in the water heater, the data that relevant electric operated thermostatic mixes water valve is not done to state at this on November 29th, 2000 disclosed Chinese patent bulletin CN2408396Y more.

Also can be with 36 cancellations of the mixed water valve among Fig. 2 embodiment, directly will manage 363, connecting leg 368, outlet pipe 369 be communicated with, outlet pipe 369 is realized that as the hot water supply pipe of a plurality of mixed water valves easy central authorities supply water, and this moment, the cold water pipe of each mixed water valve directly connect running water pipe.Certainly, also can realize central water supply at a plurality of mixed water valves 36 in parallel on pipe 363 and the connecting leg 368.

Embodiment three, Fig. 3 are the structural representations of storage water heater embodiment three described in the utility model.Belong to second technical scheme, the storage water heater comprises water tank 47, expander 43, outlet valve 46, overflow pipe 48, cold water pipe 441, hot-water line 462 and water inlet pipe 42; The water inlet of taking the outlet valve 46 of water pipe 461 out of is connected to and mixes water pipe 464, mix between water pipe 464 and the hot-water line 462 and be connected to check valve 463, mix between water pipe 464 and the connecting leg 451 and join with tapping pipe 452, the internal diameter of tapping pipe 452 is less, in order to avoid tapping pipe causes the short circuit in water route to the hot water channel; Be provided with the stop valve 1 that uses as inlet valve between connecting leg 451 and the water inlet pipe 42, the spilling water valve between the by-pass valve control between connecting leg 451 and the cold water pipe 441, cold water pipe 441 and the overflow pipe 48 is integrated in the switching valve 9.In conjunction with Fig. 4 as seen, expander 43 is made of shell 51, bearing 53, diaphragm 52 and spring 57, diaphragm 52 is sandwiched between shell 51 and the bearing 53, diaphragm and shell surround inner chamber 510, diaphragm 52 central authorities as expansion wall are fixed with the controll block 56 that tooth bar is established in both sides, the switch block 54 and 55 of corresponding conversion valve 9 and stop valve 1 stretches in the inner chamber 510 meshing with the tooth bar of controll block 56 both sides respectively respectively, the delivery port of stop valve directly communicates with inner chamber 510, feed water inlet 511 on the shell communicates with connecting leg 451 (Fig. 3), and screw 58 is used for the elastic force of regulating spring 57.Close outlet valve 46 back expanders and be transformed into state shown in Figure 5 from Fig. 4 state, in its process, diaphragm 52 drives on the controll block 56 and moves, switch block 55 clockwise rotates, and switch block 54 rotates counterclockwise, and when the expansion amplitude of diaphragm 52 was excessive, sharp perverse 531 on the bearing pierced through it.

Fig. 7 and Fig. 8 are respectively the still of switching valve use among the embodiment three and the outward appearance zoomed-in view of moving plate.Still 91 is provided with three through holes corresponding cold water channel 94, connecting leg passage 95, spilling water passage 98 respectively, wherein cold water channel 94 communicates with cold water pipe 441 (Fig. 3), connecting leg passage 95 communicates with connecting leg 451 (Fig. 3), and spilling water passage 98 communicates with overflow pipe 48 (Fig. 3); Moving plate 92 is provided with groove 921 over against a side of still 91, moving plate among Fig. 8 92 is moved to the state that is expander 43 switching valve 9 when being in Fig. 4 behind still 91 tops among Fig. 7, this time slot 921 is communicated with cold water channel 94 and connecting leg passage 95, being equivalent to by-pass valve control opens, and spilling water passage 98 is obstructed with cold water channel 94, is equivalent to the spilling water valve closing; Switch block 54 drive moving plates 92 rotate counterclockwise up to groove 921 and are communicated with cold water channel 94 and spilling water passages 98 when moving on the controll block, and cut off cold water channel 94 and connecting leg passage 95.

Fig. 9 and Figure 10 are respectively the still of stop valve use among the embodiment three and the outward appearance zoomed-in view of moving plate.Have the intake tunnel 111 that communicates with water inlet pipe 42 (Fig. 3) on the still 11, its surface also is provided with a less stern notch 112, have into water through hole 121 on the moving plate 12, when being moved to still 11 tops among Fig. 9, moving plate 12 is the state of stop valve 1 when being in Fig. 4, the stop valve opening maximum of this moment, water inlet pipe 42, intake tunnel 111, water inlet through hole 121, inner chamber 510 (Fig. 4), feed water inlet 511 (Fig. 4), connecting leg 451 (Fig. 4) order are communicated with; Controll block 56 drive switch blocks 55 clockwise rotate when closing outlet valve 46 (Fig. 3), moving plate 12 is also done motion clockwise simultaneously, the opening of stop valve reduces rapidly, enter in the scope of stern notch 112 with intake tunnel 111 dislocation up to through hole 121, at this moment, the groove 921 of switching valve moving plate 92 forwards connection cold water channel 94 and spilling water passage 98 to by being communicated with cold water channel 94 and connecting leg passage 95, intake tunnel 111 can also communicate with water inlet through hole 121 by less stern notch 112 and continue to supply water to inner chamber 510 this moment, cross stern notch 112 on the still up to the water inlet through hole 121 of stop valve moving plate, stop valve is closed fully.Connect a plurality of outlet valves 46 or mixed water valve and can realize that central authorities supply water on mixed water pipe 464, wherein the cooling water inlet of each mixed water valve connects running water pipe.

Fig. 6 is the internal structure schematic diagram of another expander used among Fig. 3 embodiment.As can be seen from Fig. 6, expander is made up of lower casing 61, upper casing 64, diaphragm 63, and diaphragm 63 is sandwiched between upper casing 61 and the lower casing 64, constitutes the inner chamber 610 of expander between diaphragm 63 and the lower casing 61, constitute the air cavity 640 of sealing between diaphragm 63 and the upper casing 64, can filling compressed air in the air cavity 640; Controll block 67 is fixed on diaphragm 63 central authorities, and the diaphragm inboard also is provided with the baffle plate 62 of band through hole 621.Its essence is with the spring among the replacement of the air pressure in the air cavity 640 Fig. 4.

Claims

1, a kind of storage water heater, comprise water tank, expander, outlet valve, overflow pipe, cold water pipe, hot-water line and water inlet pipe, wherein hot and cold water pipe communicates with water tank respectively, water inlet pipe communicates with running water pipe, it is characterized in that described outlet valve is for mixing water valve, the hot water inlet that should mix water valve connects described hot-water line, and the cooling water inlet that mixes water valve is connected to connecting leg; The expansion wall of expander is connected with controll block, and controll block is moved with expansion wall, and the expander inner chamber communicates with described connecting leg; Be provided with inlet valve between described connecting leg and the water inlet pipe, be provided with by-pass valve control between connecting leg and the cold water pipe, be provided with the spilling water valve between cold water pipe and the overflow pipe; Described inlet valve, by-pass valve control, spilling water valve are controlled by switch block separately respectively, each switch block and the interlock of described controll block.

2, according to the described storage water heater of claim 1, it is characterized in that described controll block is provided with tooth bar, described each switch block be provided with controll block on the mutually meshing tooth of tooth bar.

3, according to the described storage water heater of claim 1, it is characterized in that described by-pass valve control and spilling water valve are arranged in the switching valve, this switching valve uses a switch block.

4, according to the described storage water heater of claim 1, it is characterized in that described inlet valve, by-pass valve control and spilling water valve are arranged in the switching valve, this switching valve uses a switch block.

5, according to the described storage water heater of claim 1, it is characterized in that described expander is made up of lower casing, upper casing, diaphragm, diaphragm is sandwiched between upper casing and the lower casing, constitutes the inner chamber of expander between diaphragm and the lower casing, constitutes the air cavity of sealing between diaphragm and the upper casing.

6, a kind of storage water heater, comprise water tank, expander, outlet valve, overflow pipe, cold water pipe, hot-water line and water inlet pipe, wherein hot and cold water pipe communicates with water tank respectively, water inlet pipe communicates with running water pipe, the water inlet that it is characterized in that described outlet valve is connected to mixed water pipe, should mix to be connected between water pipe and the described hot-water line flowing to the check valve that mixes the water pipe direction, also be connected to the tapping pipe that communicates with connecting leg on this mixed water pipe; The expansion wall of expander is connected with controll block, and controll block is moved with expansion wall, and the expander inner chamber communicates with described connecting leg; Be provided with inlet valve between described connecting leg and the water inlet pipe, be provided with by-pass valve control between connecting leg and the cold water pipe, be provided with the spilling water valve between cold water pipe and the overflow pipe; Described inlet valve, by-pass valve control, spilling water valve are controlled by switch block separately respectively, each switch block and the interlock of described controll block.

7, according to the described storage water heater of claim 6, it is characterized in that described controll block is provided with tooth bar, described each switch block be provided with controll block on the mutually meshing tooth of tooth bar.

8, according to the described storage water heater of claim 6, it is characterized in that described by-pass valve control and spilling water valve are arranged in the switching valve, this switching valve uses a switch block.

9, according to the described storage water heater of claim 6, it is characterized in that described inlet valve, by-pass valve control and spilling water valve are arranged in the switching valve, this switching valve uses a switch block.

10, according to the described storage water heater of claim 6, it is characterized in that described expander is made up of lower casing, upper casing, diaphragm, diaphragm is sandwiched between upper casing and the lower casing, constitutes the inner chamber of expander between diaphragm and the lower casing, constitutes the air cavity of sealing between diaphragm and the upper casing.