CN207299545U - Water heater - Google Patents

Abstract

The utility model discloses a water heater, comprising: an inner container with a sewage outlet; a sewage discharge pipe, the sewage discharge pipe includes: an extension rod pipe section, the side wall of the extension rod pipe section is formed with a water outlet hole; a fixed connection pipe section is connected to the The lower part of the extension rod pipe section, the outer peripheral surface of the lower end of the fixed connection pipe section is surrounded by a rotating connecting plate with a gripping part, the thickness of the rotating connecting plate is between 5-15mm; the drain valve pipe section, the drain valve pipe section is located at the lower part of the fixed connecting pipe section, The pipe section of the drain valve has a water outlet passage connected with the water outlet hole. A drain valve is installed in the pipe section of the drain valve. The pipe section of the drain valve is configured with a valve cavity. The drain valve includes: a fixed ceramic piece and a movable ceramic piece installed radially along the pipe section of the drain valve; cap. According to the water heater of the embodiment of the utility model, by setting a rotating connecting plate with a grip part around the outer peripheral surface of the lower end of the fixed connecting pipe section, the installation efficiency of the sewage pipe is effectively improved, the labor intensity of the workers is reduced, and the water heater is reduced. Cost of production.

Description

water heater

technical field

The utility model belongs to the technical field of household appliances, in particular to a water heater.

Background technique

In the water heater in the related art, since the sewage pipe is a metal part, the overall weight of the sewage pipe is relatively large. Workers generally feel inconvenient to hold the sewage pipe during assembly and disassembly, and the assembly and disassembly are time-consuming and laborious.

Utility model content

The utility model aims to solve one of the above-mentioned technical problems at least to a certain extent.

Therefore, the utility model proposes a water heater, which has high installation efficiency and low production cost.

The water heater according to the utility model comprises: an inner container having a sewage outlet; a sewage discharge pipe, the sewage discharge pipe includes: an extension rod pipe section extending into the inner container, and the side wall of the extension rod pipe section is formed with The water outlet hole, the water in the inner tank enters the sewage pipe through the water outlet hole and is discharged; the fixed connection pipe section used to connect with the sewage outlet of the inner tank, and the fixed connection pipe section is connected to the extension rod pipe section The lower part of the lower end of the fixed connection pipe section is surrounded by a rotating connecting plate with a grip, and the thickness of the rotating connecting plate is between 5-15mm; the drain valve pipe section is located at the The lower part of the pipe section is fixedly connected. The pipe section of the drain valve has a water outlet passage connected with the water outlet hole. A drain valve is installed in the pipe section of the drain valve. The fixed ceramic piece and the movable ceramic piece radially installed in the pipe section of the drain valve; the movable ceramic piece and the fixed ceramic piece are provided with drainage holes through the upper and lower surfaces of the movable ceramic piece and the fixed ceramic piece; the fixed ceramic piece is opposite to the The position of the valve cavity is fixed; the moving ceramic is rotatably installed in the valve cavity, and the moving ceramic is rotatable between the first position and the second position; when the moving ceramic is in the first position , the drainage holes of the moving ceramic piece and the fixed porcelain piece are connected, and the water outlet channel is connected. When the moving porcelain piece is in the second position, the The drain hole cannot be connected, and the water outlet passage is closed; the valve cover with a channel is connected to the lower part of the drain valve pipe wall to limit the axial direction of the moving ceramic piece and the fixed ceramic piece. degree of freedom, the channel communicates with the valve cavity.

According to the water heater of the utility model, by providing a rotating connecting plate with a holding part on the outer peripheral surface of the lower end of the fixed connecting pipe section, the installation efficiency of the sewage pipe is effectively improved, the labor intensity of workers is reduced, and the production cost of the water heater is reduced. .

In addition, the water heater according to the embodiment of the utility model may also have the following additional technical features:

According to an embodiment of the present invention, the rotating connecting plate is a hexagonal connecting plate, and the radial width from the outer circumference of the fixed connecting pipe section to the outer edge of the hexagonal connecting plate is 8mm-20mm.

According to an embodiment of the present invention, the upper surface of the hexagonal connecting plate is provided with an annular boss, and the annular boss is arranged around the outer peripheral surface of the fixed connection pipe section, and the inner surface of the sewage outlet and the An annular sealing ring is arranged between the outer surfaces of the fixedly connected pipe sections, and the annular sealing ring stops against the upper surface of the annular boss.

According to one embodiment of the present utility model, the height of the annular boss is 0.5-3MM

According to an embodiment of the present utility model, the diameter of the annular boss is in the range of 30-40mm.

According to one embodiment of the present invention, there is a first internal thread at the sewage outlet of the inner tank, the fixed connection pipe section is a hollow screw, the hollow screw communicates with the valve cavity, and the outer peripheral wall of the hollow screw is set There is a first external thread matched with the first internal thread of the sewage outlet.

According to an embodiment of the present invention, the pipe section of the extension rod is a U-shaped frame, and the U-shaped frame defines at least two symmetrical water outlet holes, and the longitudinal section of the water outlet holes is square.

According to an embodiment of the present invention, the pipe section of the extension rod includes: a first connecting arm and a second connecting arm, the lower ends of the first connecting arm and the second connecting arm are connected to the upper end surface of the fixed connecting pipe section a mounting plate, the mounting plate is connected to the upper ends of the first connecting arm and the second connecting arm, and a mounting hole is formed on the mounting plate, the water heater also includes a magnesium rod, the magnesium rod One end is installed in the installation hole.

According to an embodiment of the present invention, the magnesium rod includes: a thin diameter part, the thin diameter part extends into the installation hole, the upper end of the thin diameter part is higher than the upper surface of the installation plate; The large diameter portion is connected to the upper end of the small diameter portion, and a spring washer is provided between the lower end surface of the large diameter portion and the upper surface of the mounting plate.

According to an embodiment of the present invention, a second internal thread is provided in the installation hole, and a second external thread that cooperates with the second internal thread is provided on the outer peripheral wall of the small-diameter portion.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a sectional view of a water heater according to an embodiment of the present invention;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Fig. 3 is a partial enlarged view of place B in Fig. 1;

Fig. 4 is the cross-sectional view after the blowdown pipe and the magnesium rod are assembled according to one embodiment of the utility model;

Fig. 5 is an exploded view of a sewage pipe and a magnesium rod according to an embodiment of the present invention;

Fig. 6 is a perspective view of a sewage pipe according to an embodiment of the present invention.

Reference signs:

water heater 100;

Inner tank 10; water storage cavity 11;

Sewage pipe 20;

Extension rod pipe section 21;

Water outlet hole 211; first connecting arm 212; second connecting arm 213; mounting plate 214; mounting hole 2141;

Fixed connection pipe section 22;

The rotating connecting plate 221; the annular boss 2211; the grip part 2212;

Drain valve pipe section 23;

Moving tile 231; Fixed tile 232; Drain hole 233;

valve cover 24;

Magnesium rod 30; small diameter part 31; large diameter part 32;

Inlet pipe 40;

Outlet pipe 50;

spring washer 60;

Ring sealing ring 70.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The following describes a water heater 100 according to an embodiment of the present invention with reference to FIGS. 1-6 . As shown in FIG.

As shown in Figure 1, the liner 10 defines a water storage chamber 11 having a water inlet, a water outlet and a sewage outlet, wherein the water inlet is provided with a water inlet pipe 40 communicating with the water storage chamber 11 and the external pipeline, and the water outlet is provided with There is a water outlet pipe 50 communicating with the water storage chamber 11 and external pipelines, and the water outlet end of the water outlet pipe 50 can be connected with a sprinkler for use by users.

That is to say, when the water heater 100 is in normal use, water enters through the water inlet pipe 40 , and the water flows out from the water outlet pipe 50 after being heated in the water storage cavity 11 . It can be understood that since the hot water goes up and the cold water sinks, the water outlet end of the water inlet pipe 40 is usually lower than the inlet end of the water outlet pipe 50, so that the water outlet pipe 50 can always discharge hot water. Therefore, the water in the water storage chamber 11 cannot be emptied through the water outlet pipe 50 .

Usually, after the water heater 100 is used for a period of time, a large amount of dirt will be deposited on the bottom of the inner tank 10. If the dirt cannot be cleaned up in time, the water quality of the water used will be affected, and then the skin health of the user will be affected.

The inventor found after a long period of market research that the current water heater 100 either does not have a sewage discharge function, or has a simple sewage discharge function, but the sewage discharge is inconvenient and not thorough.

In view of the above problems, the inventors of the present application have carried out a lot of research and improvement on the structure of the sewage pipe 20, so that after the sewage pipe 20 cooperates with the sewage outlet of the inner tank 10, the water in the water storage chamber 11 can be completely emptied. This makes the water heater 100 have better sewage discharge function.

The sewage pipe 20 includes: an extension rod pipe section 21 , a fixed connection pipe section 22 and a drain valve pipe section 23 . As shown in FIG. 4 , the extension rod pipe section 21 , the fixed connection pipe section 22 and the drain valve pipe section 23 are sequentially connected from top to bottom. Wherein, the sewage pipe 20 may be made of a metal with better corrosion resistance, such as copper. The copper piece is integrally formed by a forging process to form a sewage pipe 20 with an extension rod pipe section 21 , a fixed connection pipe section 22 and a drain valve pipe section 23 .

The inventor found through experiments that by setting the sewage pipe 20 as an extension rod pipe section 21, a fixed connection pipe section 22 and a drain valve pipe section 23, a better water output is ensured, and the sewage pipe 20 is better installed with the inner tank 10 Cooperate.

Specifically, as shown in FIG. 1 in conjunction with FIG. 4 , FIG. 5 and FIG. 6 , the extension rod tube section 21 extends into the inner tank 10, and the side wall of the extension rod tube segment 21 is formed with a water outlet hole 211, and the water in the inner tank 10 passes through the water outlet hole. 211 into the sewage pipe 20 to be discharged. In other words, the water in the water storage chamber 11 flows into the sewage pipe 20 through the water outlet hole 211 . That is, the size of the water outlet hole 211 is related to the water output per unit time of the sewage pipe 20. The larger the water outlet hole 211, the greater the water output per unit time; the smaller the water outlet hole 211, the smaller the water output per unit time.

As shown in FIG. 1 in conjunction with FIG. 4 , the fixed connection pipe section 22 is used to connect with the sewage outlet of the inner tank 10 , and is connected to the lower part of the extension rod pipe section 21 . That is to say, the sewage pipe 20 is connected with the inner container 10 through the fixed connection pipe section 22 . Wherein, the connection mode between the fixed connection pipe section 22 and the sewage outlet can be threaded connection, buckle connection or riveting and the like.

Because the sewage pipe 20 is a metal piece, the overall weight of the sewage pipe 20 is relatively large. Workers generally feel inconvenient to hold the sewage pipe 20 during assembly and disassembly, and it takes time and effort to assemble and disassemble it.

Therefore, the inventors improved the structure of the fixedly connected pipe section 22 . Specifically, a rotating connecting plate 222 is provided on the outer peripheral surface of the lower end of the fixed connecting pipe section 22 , and a handle 2212 is provided on the outer periphery of the rotating connecting plate 222 , so that workers can hold the holding portion 2212 to install the sewage pipe 20 . Thus, the installation efficiency of the sewage pipe 20 is effectively improved, and the labor intensity of workers is reduced.

Wherein, the thickness of the rotating connecting plate 222 may be between 5-15 mm. In this way, it can be ensured that the rotating connecting plate 222 has sufficient strength and is easy to hold, and the overall weight of the waste discharge pipe 20 is less increased.

The drain valve pipe section 23 is connected to the lower part of the fixed connection pipe section 22. The drain valve pipe section 23 has a water outlet passage communicated with the water outlet hole 211. A drain valve is installed in the drain valve pipe section 23. The drain valve pipe section 23 is configured to have a valve cavity. To turn on or off the water outlet channel.

Specifically, the drain valve includes a fixed ceramic piece 232 and a moving ceramic piece 231 installed radially along the pipe section 23 of the drain valve. The movable tile 231 and the fixed tile 232 are provided with drainage holes 233 penetrating through the upper and lower surfaces of the movable tile 231 and the fixed tile 232 .

The fixed ceramic piece 232 is fixed relative to the position of the valve chamber. The moving ceramic piece 231 is rotatably installed in the valve chamber, and the moving ceramic piece 231 is rotatable between a first position and a second position. When the moving ceramic piece 231 is in the first position, the drain holes of the moving ceramic piece 231 and the fixed porcelain piece 232 are connected, and the water outlet channel is opened; The drain hole 233 is not connected, and the water outlet channel is closed. The valve cover 24 with a channel is connected to the lower part of the drain valve pipe section 23 to limit the freedom of the movable ceramic piece 231 and the fixed ceramic piece 232 in the axial direction, and the channel communicates with the valve cavity.

In other words, the movable ceramic piece 231 can rotate along the circumferential direction of the drain valve pipe section 23. When the movable ceramic piece 231 is in the first position, the drainage holes of the movable ceramic piece 231 and the fixed ceramic piece 232 extend along the water outlet passage. The directions are completely coincident, at this time, the water outlet channel is completely connected, and the sewage pipe 20 has the maximum water output; Completely separated, at this time, the water outlet passage is completely closed, and the sewage pipe 20 does not drain to the outside; The holes are partially overlapped. At this time, the water outlet passage is partially connected, and the water output of the sewage pipe 20 is less than the maximum water output.

Therefore, according to the water heater 100 of the embodiment of the present utility model, by setting the rotating connecting plate 222 with the gripping portion 2221 around the outer peripheral surface of the lower end of the fixed connecting pipe section 22, the installation efficiency of the sewage pipe 20 is effectively improved, and the labor force of the workers is reduced. The labor intensity is reduced, and the production cost of the water heater 100 is reduced.

In some embodiments of the present invention, as shown in FIG. 5 and FIG. 6 , the rotating connecting plate 221 is a hexagonal connecting plate. In this way, the sewage discharge pipe 20 can be installed and disassembled by means of an installation wrench matched with the hexagonal connecting plate, thereby further improving the installation efficiency of the sewage discharge pipe.

In an optional embodiment, the radial width from the outer periphery of the fixed connection pipe section 22 to the outer edge of the hexagonal connecting plate is between 8 mm and 20 mm. As a result, it is more favorable for the installation wrench to cooperate with the hexagonal connecting plate, and the efficiency of installation and disassembly is improved.

In an optional implementation example, the upper surface of the hexagonal connecting plate is provided with an annular boss 2211, and the annular boss 2211 is arranged around the outer peripheral surface of the fixed connection pipe section 22, and is provided between the inner surface of the sewage outlet and the outer surface of the fixed connection pipe section 22. An annular sealing ring 70 is provided, and the annular sealing ring 70 stops against the upper surface of the annular boss 2211 . Thus, the sealing performance of the joint between the fixed connection pipe section 22 and the sewage outlet can be effectively improved.

In a further optional example, the height of the annular boss 2211 is 0.5-3MM, and the diameter of the annular boss 2211 ranges from 30-40mm. The inventor found that by designing the height of the annular boss 2211 to be 0.5-3mm and the diameter to be 30-40mm, it is not only beneficial to the processing of the sewage pipe 20, but also can improve the structural strength of the entire sewage pipe 20.

In some other embodiments of the present invention, as shown in Fig. 1 in conjunction with Fig. 3, the inner peripheral wall of the sewage outlet is provided with a first internal thread, and the fixed connection pipe section 22 is a hollow screw, and the hollow screw communicates with the valve cavity. The outer peripheral wall is provided with a first external thread matched with the first internal thread. That is to say, the sewage pipe 20 and the sewage outlet can be quickly connected by screwing, thereby improving the installation efficiency of the sewage pipe 20 and reducing the production cost of the water heater 100 .

In a specific implementation, a connecting pipe is provided in the sewage outlet, one end of the connecting pipe is connected to the sewage outlet, and the other end of the connecting pipe extends downward, and a first internal thread is provided on the inner peripheral wall of the connecting pipe to fix the connecting pipe section 22. The outer peripheral wall is provided with a first external thread matched with the first internal thread. Thereby, the installation efficiency of the waste discharge pipe 20 can be further improved.

In some optional embodiments, as shown in Figure 4, Figure 5 and Figure 6, the extension rod pipe section 21 is a U-shaped frame, and the U-shaped frame is configured with at least two symmetrical water outlet holes 211, and the longitudinal section of the water outlet holes 211 is square . That is to say, the water in the water storage chamber 11 can enter into the sewage pipe through the two water outlet holes 211 at the same time, so as to speed up the drainage speed of the water heater 100 . It can be understood that the above-mentioned embodiments are only illustrative, and are not intended to limit the protection scope of the present utility model. The shape and structure of the extension rod pipe section 21 can be adaptively modified as required, for example, two or more water outlet holes 211 can be provided in the circumferential direction of the extension rod pipe section 21 .

In a specific embodiment of the present invention, the pipe section 21 of the extension rod may include: a first connecting arm 212 , a second connecting arm 213 and a mounting plate 214 .

Specifically, the lower ends of the first connecting arm 212 and the second connecting arm 213 are connected to the upper end of the fixed connecting pipe section 22 . The mounting plate 214 is connected to the upper ends of the first connecting arm 212 and the second connecting arm 213, and a mounting hole 2141 is formed on the mounting plate 214. The water heater 100 also includes a magnesium rod 30, and one end of the magnesium rod 30 is mounted in the mounting hole 2141.

As shown in FIG. 4 and FIG. 5 , the first connecting arm 212 , the second connecting arm 213 and the mounting plate 214 are connected to each other to form a substantially U-shaped frame structure. The U-shaped frame structure can be used to install magnesium rods 30, so that there is no need to install additional devices for installing magnesium rods 30 in the inner tank 10, so that the water storage space in the inner tank 10 is larger, and the number of separately installed magnesium rods 30 is reduced. The process of the device saves man-hours and reduces the production cost of the water heater 100 .

In some other embodiments of the present invention, as shown in FIG. 4 and FIG. 5 , the magnesium rod 30 includes: a small-diameter portion 31 and a large-diameter portion 32 . Specifically, the small-diameter portion 31 extends into the installation hole 2141 , and the upper end of the small-diameter portion 31 is higher than the upper surface of the installation plate 214 . The large-diameter portion 32 is connected to the upper end of the small-diameter portion 31 . The water heater 100 is affected by the water flow in the inner tank 10 during use, and the fit between the narrow diameter portion 31 and the mounting hole 2141 will become less firm, and the spring washer 60 can also prevent the magnesium rod 30 from detaching from the mounting hole 2141, thereby improving The connection stability between the magnesium rod 30 and the mounting plate 214.

Wherein, the installation hole 2141 is provided with a second internal thread, and the outer peripheral wall of the narrow portion 31 is provided with a second external thread matched with the second internal thread. Thus, the magnesium rod 30 can be quickly installed on the mounting plate 214, improving the installation efficiency of the magnesium rod.

Other configurations of the water heater 100 according to the present invention are well understood by those skilled in the art, and will not be repeated here.

In the description of the present utility model, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "bottom", "inner" and "outer" are based on the orientations or positions shown in the accompanying drawings. The relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the utility model.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "below" and "under" the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is less horizontal than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be construed as limitations of the present invention. The above-mentioned embodiments can be changed, modified, replaced and modified within the scope of the present utility model under the principle and purpose.

Claims (10)

1. A kind of 1. water heater, it is characterised in that including：

   Liner, the liner have sewage draining exit；

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

   Stretch into the extension rod pipeline section in the liner, the extension rod pipeline section side wall is formed with apopore, the water in the liner Discharged by the apopore into the blow-off pipe；

   For the pipeline section that is fixedly connected being connected with the sewage draining exit of the liner, the pipeline section that is fixedly connected is connected to the extension rod The lower part of pipeline section, the lower end periphery face for being fixedly connected with pipeline section are arranged with the rotary connection plate with grip part, the rotation The thickness of connecting plate is between 5-15mm；

   Drain valve pipeline section, the drain valve pipeline section are fixedly connected with pipeline section lower part positioned at described, and the drain valve pipeline section has with going out Water hole connection goes out water passage, drain valve is equiped with the drain valve pipeline section, the drain valve pipeline section structure sets out valve chamber, described Drain valve includes：

   Along the definite ceramic chip and dynamic porcelain piece of the drain valve pipeline section radially installed；The dynamic porcelain piece and definite ceramic chip are equipped with described in perforation The osculum of 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 installed in the valve chamber, described dynamic Tile 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 with the osculum of the definite ceramic chip, and the water outlet is led to Road turns on, and when the dynamic porcelain piece is in the second place, the dynamic porcelain piece can not be connected with the osculum of the definite ceramic chip, institute State water outlet path blockade；

   Valve deck with passage, the lower part that the valve deck is connected to the drain valve tube wall are used to limit the dynamic porcelain piece and described The free degree of definite ceramic chip in the axial direction, the passage are communicated with the valve chamber.
2. 2. water heater according to claim 1, it is characterised in that the rotary connection plate is six side's connecting plates, it is described from The radial width of the outer edge to the six sides connecting plate that is fixedly connected with pipeline section periphery is between 8mm-20mm.
3. 3. water heater according to claim 2, it is characterised in that the upper surface of the six sides connecting plate is equipped with convex annular Platform, the annular convex platform be set around it is described be fixedly connected with pipeline section outer circumferential surface, the sewage draining exit inner surface with it is described it is fixed even Ring type seal is equipped between the outer surface of nozzle belt, the ring type seal stops the upper surface for being butted on the annular convex platform.
4. 4. water heater according to claim 3, it is characterised in that the height of the annular convex platform is 0.5-3MM.
5. 5. water heater according to claim 3, it is characterised in that the diameter dimension scope of the annular convex platform is 30- 40mm。
6. 6. water heater according to claim 1, it is characterised in that

   The internal perisporium of the sewage draining exit is equipped with the first internal thread, and the pipeline section that is fixedly connected is hollow screw, the hollow screw Communicated with the valve chamber, the periphery wall of the hollow screw is equipped with the first external screw thread with first screw-internal thread fit.
7. 7. water heater according to claim 1, it is characterised 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.
8. 8. water heater according to claim 7, it is characterised 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 surface connection of pipeline section；

   Installing plate, the installing plate is connected to the upper end of first linking arm and second linking arm, in the installing plate On formed with mounting hole, the water heater further includes magnesium rod, and one end of the magnesium rod is installed in the mounting hole.
9. 9. water heater according to claim 8, it is characterised in that the magnesium rod includes：

   Small diameter part, the small diameter part are stretched into the mounting hole, and the upper end of the small diameter part is higher than the upper surface of the installing 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 installing plate Spring washer is equipped between surface.
10. 10. water heater according to claim 8, it is characterised in that the second internal thread is equipped with the mounting hole, it is described thin The periphery wall in footpath portion is equipped with the second external screw thread with second screw-internal thread fit.