CN207688409U - Water heater - Google Patents

Abstract

The utility model discloses a kind of water heaters, including：Liner, liner have sewage draining exit；Blow-off pipe, blow-off pipe include：Extension rod pipeline section, extension rod pipeline section side wall are formed with apopore, and the water in liner enters blow-off pipe by apopore and is discharged, wherein；For being fixedly connected with pipeline section with what liner sewage draining exit was connect, it is fixedly connected with pipeline section and is connected to extension rod pipeline section lower part；Drain valve pipeline section, drain valve pipeline section, which is connected to, is fixedly connected with pipeline section lower part, drain valve pipeline section has what is be connected to apopore to go out water passage, it is installed with drain valve in drain valve pipeline section, drain valve tube wall structure sets out valve chamber, gradual increased taper surface from up to down is formed at the top of the valve chamber, recess is formed with first annular slot to the roof of valve chamber upwards, and the first sealing ring is equipped in first annular slot；Dynamic porcelain piece and definite ceramic chip；Valve deck.Water heater according to the present utility model, by gradual increased taper surface from up to down, improving water yield and reducing the flowing sound of flow the top design of valve chamber.

Description

Water heater

Technical field

The utility model belongs to an electro-technical field more particularly to a kind of water heater.

Background technology

The water yield of the blow-off pipe of water heater in the related technology is small.

Utility model content

The utility model is intended to solve one of above-mentioned technical problem at least to a certain extent.

For this purpose, the utility model proposes a kind of water heater, the water yield of the water heater is big.

Water heater according to the present utility model, including：Liner, the liner have sewage draining exit；Blow-off pipe, the blow-off pipe Including：The extension rod pipeline section in the liner is stretched into, the extension rod pipeline section side wall is formed with apopore, the water in the liner It is discharged into the blow-off pipe by the apopore；The pipeline section that is fixedly connected for being connect with the liner sewage draining exit, it is described It is fixedly connected with the lower part that pipeline section is connected to the extension rod pipeline section；Drain valve pipeline section, the drain valve pipeline section are connected to described solid Determine connecting tube pars infrasegmentalis, the drain valve pipeline section has the water passage that goes out being connected to apopore, installed in the drain valve pipeline section There are drain valve, the drain valve pipeline section structure to set out valve chamber, gradually increased taper is formed with from up to down at the top of the valve chamber Face, the drain valve include the definite ceramic chip and dynamic porcelain piece along the drain valve pipeline section radially installed；The dynamic porcelain piece and definite ceramic chip It is equipped with the osculum for penetrating through the dynamic porcelain piece and definite ceramic chip upper and lower surface；The relatively described valve chamber position of the definite ceramic chip is fixed； The dynamic porcelain piece is rotatably mounted in the valve chamber, and the dynamic porcelain piece is rotatable between the first position and the second position； When the dynamic porcelain piece is located at first position, the dynamic porcelain piece is connected to the osculum of the definite ceramic chip, it is described go out water passage lead Logical, when the dynamic porcelain piece is in the second position, the dynamic porcelain piece can not be connected to the osculum of the definite ceramic chip, and the water outlet is logical Road is closed；Valve deck with channel, the valve deck be connected to the lower part of the drain valve tube wall for limit the dynamic porcelain piece and The degree of freedom of the definite ceramic chip in the axial direction, the channel are communicated with the valve chamber.

According to the water heater of the utility model embodiment, by by the top design of valve chamber at gradually increased from up to down Taper surface improves water yield and reduces the flowing sound of flow.

In addition, according to the water heater of the utility model embodiment, there can also be following additional technical characteristic：

The internal perisporium of one embodiment according to the present utility model, the sewage draining exit is equipped with the first internal thread, described hollow The periphery wall of screw rod pipeline section is equipped with the first external screw thread with first screw-internal thread fit.

One embodiment according to the present utility model, the extension rod pipeline section are U-shaped frame, and the U-shaped frame structure is set out at least Two symmetrical apopores, the longitudinal section of the apopore are square.

One embodiment according to the present utility model, the apopore height are more than 20MM, are less than 30MM.

One embodiment according to the present utility model, the extension rod pipeline section include：First linking arm and the second linking arm, The lower end of first linking arm and second linking arm is connect with the upper end for being fixedly connected with pipeline section；Mounting plate, it is described Mounting plate is connected to the upper end of first linking arm and second linking arm, and mounting hole is formed on the mounting plate, The water heater further includes magnesium stick, and one end of the magnesium stick is installed in the mounting hole.

One embodiment according to the present utility model, the distance between first linking arm and the second linking arm are more than 13mm is less than 20mm.

One embodiment according to the present utility model, the installation plate top surface width are more than 8mm, are less than 13mm.

The length of one embodiment according to the present utility model, the installation plate top surface is more than 20mm, is less than 25mm.

One embodiment according to the present utility model, the upper end of the small diameter part are higher than the upper surface of the mounting plate；Slightly Diameter portion, the large diameter part are connected to the upper end of the small diameter part, the upper surface of the lower face of large diameter part and the mounting plate it Between be equipped with spring washer.

One embodiment according to the present utility model, the drain valve further include：Tile is supported, the bearing tile is along diameter It is used to support the definite ceramic chip and the dynamic porcelain piece to being installed in the valve chamber, wherein the bearing tile and the dynamic porcelain Piece contact surface is shiny surface.

One embodiment according to the present utility model, the bearing tile are hollow loop configuration or the bearing tile It is identical as the shape and structure of the dynamic porcelain piece.

One embodiment according to the present utility model, recess is formed with first annular slot, institute to the roof of the valve chamber upwards It states and is equipped with the first sealing ring in first annular slot.

One embodiment according to the present utility model, the upper end of the valve deck downwards concave shape at there is the second annular groove, The second sealing ring is equipped in second annular groove.

One embodiment according to the present utility model, second sealing ring include：Ring packing rib, the annular are close Envelope rib is caught in second annular groove；Tablet, the lower surface of the tablet fits in the upper surface of the valve deck, described flat The upper surface of plate fits in the lower surface of the bearing tile.

One embodiment according to the present utility model, the radial dimension etc. of first sealing ring and second sealing ring Radial dimension in the neighboring of the osculum.

The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description In become apparent, or recognized by the practice of the utility model.

Description of the drawings

The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination following accompanying drawings to embodiment Become apparent and is readily appreciated that, wherein：

Fig. 1 is the sectional view according to the water heater of the utility model one embodiment；

Fig. 2 is the partial enlarged view at A in Fig. 1；

Fig. 3 is the partial enlarged view at B in Fig. 1；

Blow-off pipes of the Fig. 4 according to the utility model one embodiment and the sectional view after the assembling of magnesium stick；

Fig. 5 is the enlarged drawing at C in Fig. 4；

Fig. 6 is the exploded view according to the blow-off pipe and magnesium stick of the utility model one embodiment；

Fig. 7 is the partial perspective view according to the blow-off pipe of the utility model one embodiment；

Fig. 8 is the stereogram according to the valve deck of the utility model one embodiment.

Reference numeral：

Water heater 100；

Liner 10；Water storage cavity 11；

Blow-off pipe 20；

Extension rod pipeline section 21；

Apopore 211；First linking arm 212；Second linking arm 213；Mounting plate 214；Mounting hole 2141；

It is fixedly connected with pipeline section 22；

Drain valve pipeline section 23；

Dynamic porcelain piece 231；Definite ceramic chip 232；Osculum 233；Support tile 234；Valve chamber 235；First annular slot 2351；

Taper surface 2352；

Valve deck 24；Second annular groove 241；Channel 242；

Magnesium stick 30；Small diameter part 31；Large diameter part 32；

Water inlet pipe 40；

Outlet pipe 50；

Spring washer 60；

First sealing ring 70；

Second sealing ring 80；

Annular sealing strip 81；Tablet 82.

Specific implementation mode

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.

Referring to Fig. 1-Fig. 8 descriptions according to the water heater 100 of the utility model embodiment, as shown in Figure 1, the water heater 100 include：Liner 10, water inlet pipe 40, outlet pipe 50 and blow-off pipe 20.

As shown in Figure 1, liner 10 limits the water storage cavity 11 with water inlet, water outlet and sewage draining exit, wherein water inlet Equipped with the water inlet pipe 40 with water storage cavity 11 and extraneous pipeline connection, water outlet is equipped with to be gone out with water storage cavity 11 and external world's pipeline connection The water outlet of water pipe 50, outlet pipe 50 can be connect with flusher with for users to use.

That is, water heater 100 in normal use, is intake by water inlet pipe 40, water heating in water storage cavity 11 Afterwards, it is flowed out from outlet pipe 50.It is understood that since hot water is up walked, cold water sinks, and the water outlet of water inlet pipe 40 is usual Less than the input end of outlet pipe 50, to ensure that outlet pipe 50 can discharge hot water always.Therefore, the water in water storage cavity 11 can not It is emptied by outlet pipe 50.

After used a period of time, the bottom of liner 10 can deposit a large amount of dirt to usual water heater 100, if can not Dirt is cleaned out in time, will necessarily influence to make quality of water, and then influence the skin health of user.

Inventor by prolonged market survey find, current water heater 100 however do not have dirt eliminating function or tool There is simple dirt eliminating function, but blowdown is inconvenient, is not thorough.

Present inventor is in view of the above-mentioned problems, the structure to blow-off pipe 20 has carried out numerous studies and improvement so that Blow-off pipe 20 can thoroughly empty the water in water storage cavity 11 so that water heater 100 with after the sewage draining exit cooperation of liner 10 With preferable dirt eliminating function.

As shown in Figure 4-Figure 6, which includes：Extension rod pipeline section 21 is fixedly connected with pipeline section 22 and drain valve pipeline section 23.As shown in figure 4, extension rod pipeline section 21, being fixedly connected with pipeline section 22 and drain valve pipeline section 23 is sequentially connected from top to bottom.Wherein, Blow-off pipe 20 can be that corrosion-resistant preferable metal is prepared, for example, copper.Copper piece by forge processing and forming technology one at The blow-off pipe 20 that type has extension rod pipeline section 21, is fixedly connected with pipeline section 22 and drain valve pipeline section 23.

Specifically, as shown in Fig. 1 combinations Fig. 4 and Fig. 7, extension rod pipeline section 21 stretches into liner 10,21 side of extension rod pipeline section Wall is formed with apopore 211, and the water in liner 10 enters blow-off pipe 20 by apopore 211 and is discharged.In other words, in water storage cavity 11 Water flowed in blow-off pipe 20 by apopore 211.That is the size of apopore 211 and the water yield in 20 unit interval of blow-off pipe Correlation, apopore 211 is bigger, and the water yield in the unit interval is bigger；Apopore 211 is smaller, and the water yield in the unit interval is got over It is small.

As shown in Fig. 1 combinations Fig. 3, pipeline section 22 is fixedly connected with for being connect with the sewage draining exit of liner 10, is connected to extension The lower part of rod tube section 21.That is, blow-off pipe 20 is connect by being fixedly connected with pipeline section 22 with liner 10.Wherein, it is fixedly connected Pipeline section 22 can be to be threadedly coupled, snap connection or rivet with sewage draining exit connection type.

Drain valve pipeline section 23, which is connected to, is fixedly connected with 22 lower part of pipeline section, and drain valve pipeline section 23 has to be connected to apopore 211 Go out water passage, drain valve is installed in drain valve pipeline section 23, drain valve tube wall structure sets out valve chamber 235.The drain valve is for leading Lead to or close out water passage.

Specifically, drain valve includes the definite ceramic chip 232 and dynamic porcelain piece 231 along 23 radially installed of drain valve pipeline section.Dynamic porcelain piece 231 and definite ceramic chip 232 be equipped with perforation dynamic porcelain piece 231 and 232 upper and lower surface of definite ceramic chip osculum 233.

Definite ceramic chip 232 is fixed with respect to 235 position of valve chamber.Dynamic porcelain piece 231 is rotatably mounted in valve chamber 235, dynamic porcelain piece 231 is rotatable between the first position and the second position.When dynamic porcelain piece 231 is located at first position, dynamic porcelain piece 231 and definite ceramic chip 232 osculum 233 is connected to, and goes out water passage opening, dynamic porcelain piece 231 is not connected to the osculum 233 of definite ceramic chip 232, when dynamic porcelain Piece 231 is discharged path blockade at the second position.It uses the lower part that valve deck 24 with channel 242 is connected to drain valve pipeline section 23 In limiting the degree of freedom of dynamic porcelain piece 231 and definite ceramic chip 232 in the axial direction, channel 242 is communicated with valve chamber 235.

In other words, dynamic porcelain piece 231 can be rotated along the circumferential direction of drain valve pipeline section 23, and dynamic porcelain piece 231 is located at first When position, the osculum of dynamic porcelain piece 231 is completely superposed with the osculum of definite ceramic chip 232 along the extending direction for going out water passage, this When, go out water passage and be fully turned on, blow-off pipe 20 has maximum water yield；When dynamic porcelain piece 231 is located at the second position, porcelain is moved The osculum of piece 231 and the osculum 233 of definite ceramic chip 232 are separated completely, are completely enclosed at this point, going out water passage, blow-off pipe 20 do not drain externally；Dynamic porcelain piece 231 between first position and the second postion when, the osculum 233 of dynamic porcelain piece 231 with it is fixed The osculum of tile 232 partially overlaps, at this point, going out, water passage is partially ON, the water yield of blow-off pipe 20 be less than it is maximum go out Water.

As shown in Figure 1 with Figure 2, the top of valve chamber 235 is formed with from up to down gradually increased taper surface 2352, to An aperture gradually increased intercommunicating pore is formed on the top for going out drain valve pipeline section 23, in this way, when drain valve is connected, flow can It to be entered in valve chamber by intercommunicating pore, and is discharged across the channel of valve deck 24, the taper surface 2352 of flaring increases the stream of flow Logical area, to improve the water yield of blow-off pipe 20.And the taper surface by the way that flaring is arranged at the top of valve chamber 235, it can be with So that it is more gentle in flow flow process, generate rustlingly singing of the stream under avoiding flow from coming down in torrents directly.

As a result, according to the water heater of the utility model embodiment 100, by by the top design of valve chamber at from up to down by Gradually increased taper surface improves water yield and reduces the flowing sound of flow.

In some embodiments of the utility model, as shown in Fig. 1 combinations Fig. 3, the internal perisporium of sewage draining exit is equipped in first Screw thread is fixedly connected with the periphery wall of pipeline section 22 equipped with the first external screw thread with the first screw-internal thread fit.That is, blow-off pipe 20 It can quickly be connect by way of screw-thread fit with sewage draining exit, to improve the installation effectiveness of blow-off pipe 20, reduce water heater 100 production cost.

In being embodied at one, connecting tube is equipped in sewage draining exit, one end of connecting tube is connected to sewage draining exit, connecting tube The other end extends downwardly, and is equipped with the first internal thread in the internal perisporium of connecting tube, the periphery wall for being fixedly connected with pipeline section 22 is equipped with and institute State the first external screw thread of the first screw-internal thread fit.Thus, it is possible to further increase the installation effectiveness of blow-off pipe 20.

In some optional embodiments, as shown in figs. 4 and 7, extension rod pipeline section 21 is U-shaped frame, and U-shaped frame structure is set out at least Two symmetrical apopores 211, the longitudinal section of apopore 211 are square.That is, the water in water storage cavity 11 can pass through simultaneously Two apopores 211 enter in blow-off pipe 20, to accelerate the drainage speed of water heater 100.It is understood that above-mentioned implementation Example is only illustrative, and is not the limitation for the range protected to the utility model.The shape and structure of extension rod pipeline section 21 can To make the modification of adaptability as needed, for example, the circumferential direction of extension rod pipeline section 21 can be equipped with two or more Apopore 211.

In some optional examples, inventor has found, 211 height H1 of apopore is set greater than 20MM, less than 30MM's Situation can make water yield be maintained at preferable level, and the processing of extension rod pipeline section 21 is made to be easier to be molded.

In one specific embodiment of the utility model, extension rod pipeline section 21 may include：First linking arm 212, second Linking arm 213 and mounting plate 214.

Specifically, the lower end of the first linking arm 212 and the second linking arm 213 is connect with the upper end for being fixedly connected with pipeline section 22. Mounting plate 214 is connected to the upper end of the first linking arm 212 and the second linking arm 213, and mounting hole is formed on mounting plate 214 2141, water heater 100 further includes magnesium stick 30, and one end of magnesium stick 30 is installed in mounting hole 2141.

As shown in Figure 4 and Figure 5, the first linking arm 212, the second linking arm 213 and mounting plate 214 are connected with each other structure and set out greatly Body U-shaped frame structure.The U-shaped frame structure can be used for installing magnesium stick 30, in this way, without additionally setting installation magnesium in liner 10 The device of stick 30, so that 10 inner storing water space bigger of liner, and reduce the process of separately installed 30 device of magnesium stick, it saves In working hour, reduce the production cost of water heater 100.

In alternative embodiment, as shown in figure 3, the distance between the first linking arm 212 and the second linking arm 213 W1 are arranged to More than 13mm, it is less than 20mm.214 top surface width of mounting plate is more than 8mm, is less than 13mm.The length of 214 top surface of mounting plate is more than 20mm is less than 25mm.Thus, it is possible to so that water yield is maintained at preferable level, and make the processing of extension rod pipeline section 21 more It is easy molding.

In other embodiments of the utility model, as shown in Figure 4 and Figure 6, magnesium stick 30 includes：Small diameter part 31 and particle size Portion 32.Specifically, small diameter part 31 stretches into mounting hole 2141, and the upper end of small diameter part 31 is higher than the upper surface of mounting plate 214.Particle size Portion 32 is connected to the upper end of small diameter part 31.Wherein, threaded hole can be equipped on mounting plate 214, small diameter part 31 is equipped with and mounting hole The helicitic texture of 2141 cooperations.Water heater 100 is influenced by flow in liner 10 in use, small diameter part 31 and installation The cooperation in hole 2141 will become that so securely, spring washer 60 is not also possible to prevent magnesium stick 30 and is detached from out of mounting hole 2141, To improve the connective stability between magnesium stick 30 and mounting plate 214.

In still other embodiments of the present invention, drain valve further includes：Support tile 234.It is radially mounted to support tile 234 It is interior for supporting definite ceramic chip 232 and dynamic porcelain piece 231 in valve chamber 235, wherein bearing tile 234 is light with 231 contact surface of dynamic porcelain piece Sliding surface.I.e. the upper surface of dynamic porcelain piece 231 is bonded with the lower surface of definite ceramic chip 232, lower surface and the bearing tile of dynamic porcelain piece 231 234 upper surface fitting, in other words, dynamic porcelain piece 231 is clamped between definite ceramic chip 232 and bearing tile 234.Tile will be supported 234 are arranged to shiny surface on one side with what dynamic porcelain piece 231 contacted, can make frictional force of the dynamic porcelain piece 231 in rotation process compared with It is small, be conducive to dynamic porcelain piece 231 and swimmingly rotate.

In alternative embodiment, bearing tile 234 is hollow loop configuration.In this way, the osculum 233 of dynamic porcelain piece 231 with The osculum 233 of definite ceramic chip 232 is partially overlapped or is completely superposed, and going out water passage, locally conducting or fully on situation, water can To be discharged across hollow bearing tile 234.

In other alternative embodiments, bearing tile 234 is identical as the shape and structure of dynamic porcelain piece 231.Support tile 234 Also have and support tile in the osculum 233 of dynamic porcelain piece 231 and the misaligned osculum of definite ceramic chip 232 with osculum 233 The osculum of 234 osculum and dynamic porcelain piece 231 is misaligned；In the draining of the osculum 233 and definite ceramic chip 232 of dynamic porcelain piece 231 When hole 233 overlaps, the osculum 233 of bearing tile 234 is also overlapped with the osculum of dynamic porcelain piece 231.

In a specific embodiment of the invention, with reference to shown in Fig. 5 and Fig. 8, blow-off pipe 20 further includes：Second sealing ring 80.The upper end of valve deck 24 the second annular groove 241 that the second sealing rings of concave shape Cheng Youyu 80 coordinate downwards.Thus, it is possible to anti- The only junction infiltration between valve deck and 24 drain valve pipeline sections 23, improves the leakproofness of blow-off pipe 20.

In optional implementation example, the second sealing ring 80 includes：Ring packing rib 81 and tablet 82.Ring packing rib 81 It is caught in the second annular groove 241.The lower surface of tablet 82 fits in the upper surface of valve deck 24, upper surface and the bearing porcelain of tablet 82 The shiny surface of piece 234 coordinates.Thus, it is possible to further increase the leakproofness of blow-off pipe 20.

In further optional implementation example, the radial dimension of the first sealing ring 70 and the second sealing ring 80 is equal to osculum The radial dimension of 233 neighboring.Thus, it is possible to further increase the leakproofness of blow-off pipe 20.

In addition, other of water heater 100 according to the present utility model are configured to what those skilled in the art were understood, here It repeats no more.

In the description of the present invention, it should be understood that the instructions such as term "upper", "lower" ", bottom ", "inner", "outside" Orientation or positional relationship be to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and letter Change description, do not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and Operation, therefore should not be understood as limiting the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features are in direct contact, and can also not be to be in direct contact but lead to including the first and second features Cross the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the One feature is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special Sign second feature " under ", " lower section " and " below " include fisrt feature right over second feature and oblique upper, or only Indicate that fisrt feature level height is less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be It can be combined in any suitable manner in any one or more embodiments or example.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and Modification.

Claims (15)

1. a kind of water heater, which is characterized in that including：

Liner, the liner have sewage draining exit；

Blow-off pipe, the blow-off pipe include：

The extension rod pipeline section in the liner is stretched into, the extension rod pipeline section side wall is formed with apopore, the water in the liner It is discharged into the blow-off pipe by the apopore

The pipeline section that is fixedly connected for being connect with the liner sewage draining exit, the pipeline section that is fixedly connected are connected to the extension rod tube The lower part of section；

Drain valve pipeline section, the drain valve pipeline section be connected to it is described be fixedly connected with pipeline section lower part, the drain valve pipeline section have with Apopore connection goes out water passage, drain valve is installed in the drain valve pipeline section, the drain valve pipeline section structure sets out valve chamber, institute It states and is formed with from up to down gradually increased taper surface at the top of valve chamber；

The drain valve includes the definite ceramic chip and dynamic porcelain piece along the drain valve pipeline section radially installed, the dynamic porcelain piece and definite ceramic chip It is equipped with the osculum for penetrating through the dynamic porcelain piece and definite ceramic chip upper and lower surface, the relatively described valve chamber position of the definite ceramic chip is fixed； The dynamic porcelain piece is rotatably mounted in the valve chamber, and the dynamic porcelain piece is rotatable between the first position and the second position； When the dynamic porcelain piece is located at first position, the dynamic porcelain piece is connected to the osculum of the definite ceramic chip, it is described go out water passage lead Logical, when the dynamic porcelain piece is in the second position, the dynamic porcelain piece can not be connected to the osculum of the definite ceramic chip, and the water outlet is logical Road is closed；

Valve deck with channel, the valve deck are connected to the lower part of the drain valve tube wall for limiting the dynamic porcelain piece and described The degree of freedom of definite ceramic chip in the axial direction, the channel are communicated with the valve chamber.

2. water heater according to claim 1, which is characterized in that the internal perisporium of the sewage draining exit is equipped with the first internal thread, The periphery wall for being fixedly connected with pipeline section is equipped with the first external screw thread with first screw-internal thread fit.

3. water heater according to claim 1, which is characterized in that the extension rod pipeline section is U-shaped frame, the U-shaped frame structure At least two symmetrical apopores are set out, the longitudinal section of the apopore is square.

4. water heater according to claim 3, which is characterized in that the apopore height is more than 20MM, is less than 30MM.

5. water heater according to claim 3, which is characterized in that the extension rod pipeline section includes：

The lower end of first linking arm and the second linking arm, first linking arm and second linking arm is fixedly connected with described The upper end of pipeline section connects；

Mounting plate, the mounting plate is connected to the upper end of first linking arm and second linking arm, in the mounting plate On be formed with mounting hole, the water heater further includes magnesium stick, and one end of the magnesium stick is installed in the mounting hole.

6. water heater according to claim 5, which is characterized in that between first linking arm and second linking arm Distance be more than 13mm, be less than 20mm.

7. water heater according to claim 5, which is characterized in that the installation plate top surface width is more than 8mm, is less than 13mm。

8. water heater according to claim 5, which is characterized in that the length of the installation plate top surface is more than 20mm, is less than 25mm。

9. water heater according to claim 5, which is characterized in that the magnesium stick includes：

Small diameter part, the small diameter part stretch into the mounting hole, and the upper end of the small diameter part is higher than the upper surface of the mounting plate；

Large diameter part, the large diameter part are connected to the upper end of the small diameter part, in the upper of the lower face of large diameter part and the mounting plate Spring washer is equipped between surface.

10. water heater according to claim 1, which is characterized in that the drain valve further includes：Support tile, the branch Hold tile it is radially mounted in the valve chamber for supporting the definite ceramic chip and the dynamic porcelain piece, wherein the bearing tile It is shiny surface with the dynamic porcelain piece contact surface.

11. water heater according to claim 10, which is characterized in that the bearing tile is hollow loop configuration or institute It is identical as the shape and structure of the dynamic porcelain piece to state bearing tile.

12. water heater according to claim 10, which is characterized in that recess is formed with first to the roof of the valve chamber upwards Annular groove, the first annular slot is interior to be equipped with the first sealing ring.

13. water heater according to claim 12, which is characterized in that the upper end of valve deck concave shape Cheng You downwards Second ring slot, second annular groove is interior to be equipped with the second sealing ring.

14. water heater according to claim 13, which is characterized in that second sealing ring includes：

Ring packing rib, the ring packing rib are caught in second annular groove；

Tablet, the lower surface of the tablet fit in the upper surface of the valve deck, and the upper surface of the tablet fits in the branch Hold the lower surface of tile.

15. water heater according to claim 13, which is characterized in that first sealing ring and second sealing ring Radial dimension is equal to the radial dimension of the neighboring of the osculum.