CN220958950U - Corrosion-resistant assembly and water heater - Google Patents

Abstract

The application relates to an anti-corrosion component and a water heater, comprising: the anti-corrosion rod is internally provided with mounting holes penetrating through two ends of the anti-corrosion rod along the extending direction of the anti-corrosion rod; the guide rod is penetrated through the mounting hole and comprises a detection rod and an insulating layer, and the insulating layer coats the detection rod so as to isolate the detection rod from the anti-corrosion rod; one end of the detection rod extends out of the insulating layer and the anti-corrosion rod to form a detection part. The anti-corrosion rod is self-consumed, so that the inner container is protected, and meanwhile, the detection part of the detection rod is utilized to detect water in the inner container, so that functions of the anti-corrosion assembly are more abundant, mounting hole sites on the inner container can be reduced, the assembly efficiency is improved, and the water leakage risk is reduced.

Description

Corrosion-resistant assembly and water heater

Technical Field

The application relates to the technical field of water heaters, in particular to an anti-corrosion assembly and a water heater.

Background

In the field of water heaters, an inner container of an electric water heater is used as a hot water generating and storing container, because the water in the inner container of the electric water heater is not pure, and some impurities contained in the inner container of the electric water heater have certain corrosiveness, the inner container of the electric water heater is easy to corrode, and in order to avoid water leakage of the inner container due to corrosion perforation, a magnesium rod is often arranged on the inner container; meanwhile, in order to detect the working state of the electric water heater, hole sites are additionally arranged on the inner container for installing various detection elements, so that the risk of water leakage of the inner container is increased.

Disclosure of utility model

One of the technical problems to be solved by the application is to provide an anti-corrosion assembly which solves the problem of single function of a magnesium rod and can reduce the mounting hole sites on the liner.

The second technical problem to be solved by the application is to provide the water heater, and the anti-corrosion assembly not only can realize anti-corrosion protection on the inner container, but also can prevent the heating pipe from dry burning, and reduces the mounting hole sites on the inner container.

The first technical problem is solved by the following technical scheme: a corrosion protection assembly comprising:

The anti-corrosion rod is internally provided with mounting holes penetrating through two ends of the anti-corrosion rod along the extending direction of the anti-corrosion rod;

The guide rod is penetrated through the mounting hole and comprises a detection rod and an insulating layer, and the insulating layer coats the detection rod so as to isolate the detection rod from the anti-corrosion rod; one end of the detection rod extends out of the insulating layer and the anti-corrosion rod to form a detection part; the detection part is used for contacting with water in the inner container.

Compared with the background technology, the anti-corrosion component has the beneficial effects that: when the anti-corrosion component is applied to the electric water heater, the self consumption of the anti-corrosion rod in the protection process is utilized to realize the protection of the liner; meanwhile, the detection rod is integrated on the anti-corrosion component, the detection part is used for detecting water in the liner, so that the mounting hole site on the liner can be reduced, the functions of the anti-corrosion component are more abundant, the assembly efficiency is improved, and the water leakage risk is reduced.

In one embodiment, the insulating layer is removably attached to the corrosion protection rod.

In one embodiment, the mounting hole is a round hole, and the inner wall of the mounting hole is provided with internal threads; the insulating layer is cylindrical, is equipped with the locking screw thread of being connected with the internal thread cooperation on the insulating layer.

In one embodiment, the internal thread is provided on an inner wall of one end of the mounting hole, and the locking thread is provided on a side surface of the insulating layer, which is far away from the protruding end of the detecting rod.

In one embodiment, the device further comprises a plug connected with the guide rod, wherein the plug is provided with a through locking hole;

the leading rod is arranged in the locking hole in a penetrating way, and the other end of the detecting rod extends out of the insulating layer and the plug to form a terminal part.

In one embodiment, the locking hole is a circular hole, and the locking thread is connected with the locking hole, so that the guide rod is fixedly connected with the plug.

In one embodiment, the plug comprises a body and a step, the guide rod is sleeved with a guide rod sealing ring, the guide rod sealing ring is located between the body and the step, and the body and the step can clamp the guide rod sealing ring.

In one embodiment, a groove is formed in one side, away from the step, of the body, a plug sealing ring is arranged at the bottom of the groove, and sealing threads are formed in the inner wall of the groove.

The second technical problem is solved by the following technical scheme: a water heater, comprising:

Comprising the following steps:

The inner container is internally provided with a water storage cavity;

the heating pipe is arranged in the water storage cavity; and

The anti-corrosion assembly in the embodiment is arranged in the inner container, and the guide rod is vertically arranged in the water storage cavity.

In one embodiment, the detecting rod is a corrosion-resistant metal rod, the detecting portion is higher than the heating pipe, and a gap is formed between the detecting portion and the inner wall of the liner.

Compared with the background technology, the water heater has the beneficial effects that: when the anti-corrosion component is applied to the electric water heater, the self-consumption of the anti-corrosion rod in the protection process is realized, so that the protection of the liner is realized. Meanwhile, the detection part of the detection rod is higher than the heating pipe, the detection part can be used for monitoring the water level of water in the inner container to judge whether the water level is beyond the heating pipe or not so as to prevent the heating pipe from dry burning, a corresponding water level sensor is not required to be installed in an additional hole, and the water leakage risk of the inner container is reduced.

Drawings

Fig. 1 is a cross-sectional view of a corrosion protection assembly according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of an anti-corrosion bar and a guide bar in an anti-corrosion assembly according to an embodiment of the present application.

Fig. 3 is a bottom view of an inner plug of a corrosion protection assembly according to an embodiment of the present application.

Fig. 4 is a partial cross-sectional view of a corrosion protection assembly provided in accordance with an embodiment of the present application.

FIG. 5 is a simplified schematic diagram of a water heater according to an embodiment of the present application.

FIG. 6 is a schematic diagram of a heating tube in a water heater according to an embodiment of the application.

Reference numerals:

101. An inner container; 102. a top temperature sensor; 103. a water outlet pipe; 104. a water inlet pipe; 105. an electricity-proof wall; 106. heating pipes; 107. a control board; 108. a liner temperature sensor; 109. a temperature limiter;

1051. A flow sensor;

1061. A lower heating pipe; 1062. an upper heating pipe; 1063. a blind pipe; 1064. a heat collecting cup;

20. An anti-corrosion component;

21. An anti-corrosion bar; 22. a guide bar; 23. a plug; 24. a guide rod sealing ring; 25. a plug sealing ring;

211. An internal thread; 212. a mounting hole;

221. A detection rod; 222. An insulating layer; 223. Locking threads;

2211. A detection unit; 2212. A terminal portion;

2221. A connection part;

231. a locking hole; 232. a step; 233. a body;

2331. a groove; 2332. sealing the screw thread.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center," "thickness," "upper," "lower," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present application and simplifying the description, but do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 1 and 2, in some embodiments of the application, the application provides a corrosion protection assembly 20 comprising: a corrosion protection bar 21 and a guide bar 22. The anti-corrosion bar 21 is connected with the guide bar 22. Specifically, the antiseptic bar 21 has therein mounting holes 212 penetrating both ends thereof in the extending direction thereof. The guide bar 22 is installed in the installation hole 212, the guide bar 22 includes a detection bar 221 and an insulation layer 222, and the insulation layer 222 covers the detection bar 221.

The material of the corrosion preventing rod 21 may be selected from zinc, aluminum, magnesium alloy, aluminum alloy, and active metals such as zinc alloy. The active metal of the corrosion prevention rod 21 may preferentially react with corrosive substances in water. Preferably, the insulating layer 222 is formed by casting an insulating material on the surface of the detection rod 221. The insulating layer 222 is formed on the surface of the detecting rod 221 by injection molding, so that the connection between the detecting rod 221 and the insulating layer 222 is tighter, and liquid is prevented from leaking from the gap between the detecting rod 221 and the insulating layer 222.

One end of the detecting rod 221 extends out of the insulating layer 222 and the anti-corrosion rod 21, and one end of the detecting rod 221 extends out of the insulating layer 222 and the anti-corrosion rod 21 to form a detecting portion 2211, wherein the detecting portion 2211 is used for contacting with water in the liner 101. One end of the insulating layer 222 protrudes from the corrosion prevention rod 21 to form a connection portion 2221, and the detection portion 2211 protrudes from the connection portion 2221.

Alternatively, the detecting portion 2211 may be used for detecting the temperature of water in the inner container 101 or for detecting the water level of water in the inner container 101; when the detecting portion 2211 is used for detecting the temperature of the water in the liner 101, the detecting portion 2211 may be a temperature probe.

With reference to fig. 5, the preservative assembly 20 of the above embodiment is adapted for use in a water heater comprising: a liner 101 and a heating tube 106. The inner container 101 is provided with a water storage cavity, and the heating pipe 106 is arranged in the water storage cavity. The liquid in the reservoir can be heated by the heating tube 106. The preservative assembly 20 is also disposed within the water storage chamber. Specifically, the anti-corrosion assembly 20 is installed in the inner container 101, and the anti-corrosion rod 21 is vertically disposed in the water storage cavity.

Illustratively, when the detecting portion 2211 is used to detect the water level of the water in the inner container 101, the detecting portion 2211 is higher than the heating pipe 106, and a gap is provided between the detecting portion 2211 and the inner wall of the inner container 101.

Further, the detection rod 221 is a corrosion-resistant metal rod. The material of the detecting rod 221 may be selected from corrosion-resistant metals such as titanium, stainless steel, etc., and the detecting rod 221 has a conductive property while the insulating layer 222 is not conductive.

More specifically, the other end of the detection rod 221 also protrudes from the insulating layer 222 to form a terminal portion 2212. It can be appreciated that the terminal portion 2212 is used for connecting with a power wire, so that the detecting rod 221, the liner wall of the liner 101, the power source and the detector are electrically connected, the detector is electrically connected with the heating tube 106 through the control board 107, the voltage or current signal is detected through the detector, and the control board 107 determines that the heating tube 106 can work according to the detection result of the detector.

It should be noted that the manner in which the detecting rod 221 is electrically connected to the power source includes, but is not limited to, that the portion of the other end of the detecting rod 221 extending out of the insulating layer 222 is connected to the power source wire. The other end of the detection rod 221 is housed in the insulating layer 222, and the detection rod 221 is electrically connected to the power supply in the same manner as the manner in which the conductor is connected to the power supply by passing through the insulating layer 222 and contacting the detection rod 221.

The principle of controlling the operation of the heating pipe 106 according to the detection result of the detector is that: the horizontal plane where the connection position of the detection portion 2211 and the connection portion 2221 is located is a preset water level, when the liquid level in the water storage cavity is lower than the preset water level, the liquid in the water storage cavity can only contact with the insulating layer 222, and the insulating layer 222 is not conductive, the detection rod 221, the liner wall of the liner 101, the power supply and the detector can not form a circuit path, at this time, the detector sends a first signal to the control board 107, and when the control board 107 receives the first signal, the control board 107 outputs an instruction that the heating pipe 106 can not work. When the liquid level in the water storage cavity is not lower than the preset water level, the liquid in the water storage cavity is contacted with the detection rod 221, in general, the water used in daily life contains impurities, the impurities are actually a conductor, when the liquid in the water storage cavity is contacted with the detection rod 221, the liner wall of the liner 101, the power supply and the detector can form a circuit path, at the moment, the detector can detect a voltage or current signal, the detector sends a second signal to the control board 107, and the control board 107 outputs an instruction that the heating pipe 106 can work after receiving the second signal.

The control board 107 outputs instructions that the heating pipe 106 can work or not work, which can be forced instructions or prompt instructions.

And the gap between the detecting rod 221 and the inner wall of the inner container 101 can avoid the direct contact between the detecting rod 221 and the inner wall of the inner container 101 to realize the electric connection, which affects the accuracy of the detecting result of the voltage detector.

In this scheme, because the detection rod 221 that stretches out in insulating layer 222 is higher than heating pipe 106, presets the water level and is higher than heating pipe 106 promptly, when the liquid level is not less than preseting the water level, the liquid in the water storage chamber can fully submerge heating pipe 106, can effectively prevent the dry combustion method of heating pipe 106. Meanwhile, the function of the anti-corrosion component 20 in the scheme is more abundant, and the anti-corrosion component is not only used for corrosion prevention, but also used for water level detection. Due to the multifunctional use of the anti-corrosion assembly 20, the number of mounting holes reserved on the liner 101 for the water level sensor can be reduced, the assembly steps are simplified, the tightness of the liner 101 is improved, and the water leakage risk is reduced.

Further, as shown in fig. 5 in combination with fig. 6, the heating pipe 106 includes an upper heating pipe 1062 and a lower heating pipe 1061 arranged vertically up and down, the upper heating pipe 1062 being located above the lower heating pipe 1061. The upper heating pipe 1062 and the lower heating pipe 1061 are controlled by the control board 107 to facilitate heating alone.

Illustratively, the height of the preset water level is at least 1cm higher than the highest point of the upper heating pipe 1062 in the vertical direction, ensuring that the liquid can completely submerge the upper heating pipe 1062 and the lower heating pipe 1061 when the liquid level reaches the preset water level.

The water heater further comprises: a flow sensor 1051 and a top temperature sensor 102, the flow sensor 1051 being configured to detect a flow rate value within the bladder 101, the top temperature sensor 102 being mounted on the bladder wall adjacent the bladder 101 adjacent the upper heating tube 1062. The heating pipe 106 further comprises a blind pipe 1063, wherein the blind pipe 1063 is internally provided with a liner temperature sensor 108 and a temperature limiter 109, and the flow sensor 1051, the liner temperature sensor 108, the temperature limiter 109 and the top temperature sensor 102 are respectively and electrically connected with the control board 107.

In this scheme, heating pipe 106 still includes gathers hot cup 1064, gathers hot cup 1064 and covers and establish heating pipe 1062, and the one end of the outlet pipe 103 of this water heater is located gathers hot cup 1064, gathers hot cup 1064 and can reduce thermal diffusion for gather the liquid temperature in the hot cup 1064 and rise fast.

Preferably, the working steps of the water heater include:

injecting water into the inner container 101, and judging whether the inner container 101 is full of water;

if the liquid level is lower than the preset water level, the detector sends a first signal to the control panel 107, judges that the water is not filled, and outputs an instruction that the machine cannot be started;

If the liquid level is not lower than the preset water level, the detector sends out a second signal of the control panel 107, judges that the water is filled, and outputs a command for starting up;

After normal start-up, the lower heating pipe 1061 works and the upper heating pipe 1062 is closed;

When the signals detected by the flow sensor 1051 and the top temperature sensor 102 simultaneously meet the preset flow and top temperature set values in the control panel 107, the upper heating pipe 1062 is switched to work, and the lower heating pipe 1061 is closed.

The lower heating pipe 1061 is used for preheating the liquid in the liner 101, and the upper heating pipe 1062 can quickly raise the temperature of the liquid in the heat collecting cup 1064, so as to achieve the effect of rapid heating.

Furthermore, the water storage cavity is also provided with a power-proof wall 105, and the power-proof wall 105 is arranged on the liner wall of the liner 101. The anti-electricity wall 105 adopts a water resistance attenuation isolation method to reduce the current in water. Specifically, the water channel is prolonged through the arrangement of the electricity-proof wall 105, so that the resistance of water is increased, and the current passing through the water is reduced on the premise that the total passing voltage is unchanged, so that the electricity-proof function is realized. Illustratively, the anti-electricity wall 105 is disposed between the anti-corrosion assembly 20 and the heating tube 106. The flow sensor 1051 is installed on the electricity prevention wall 105 to detect the flow rate of the liquid in the waterway extended by the electricity prevention wall 105.

In some embodiments of the present application, as shown in fig. 1 and 2, the anti-corrosion bar 21 and the guide bar 22 are connected by threads. Wherein, the mounting hole 212 is a round hole, and the insulating layer 222 is cylindrical. The inner wall of the mounting hole 212 is provided with an internal thread 211, and the insulating layer 222 is provided with a locking thread 223 which is in fit connection with the internal thread 211. The guide rod 22 is arranged in the mounting hole 212 in a penetrating way, and the internal thread 211 and the locking thread 223 can be meshed by rotating the anti-corrosion rod 21, so that the anti-corrosion rod 21 and the guide rod 22 are fixedly connected. Meanwhile, the internal threads 211 are meshed with the locking threads 223, so that the limiting capacity of the anti-corrosion rod 21 relative to the guide rod 22 along the axis direction of the anti-corrosion rod 21 can be enhanced, and the connection between the anti-corrosion rod 21 and the guide rod 22 is more stable. In addition, the engagement of the internal thread 211 and the locking thread 223 can further complicate the structure of the gap between the anti-corrosion bar 21 and the guide bar 22, and has the effect of sealing the gap between the anti-corrosion bar 21 and the guide bar 22.

Specifically, the internal thread 211 is provided on the inner wall of one end of the mounting hole 212, and the locking thread 223 is provided on the side of the insulating layer 222 which is away from the protruding end of the detection rod 221.

Further, as shown in fig. 3 and 4, the anti-corrosion component 20 further includes a plug 23, where the plug 23 is used to improve the tightness of the connection between the anti-corrosion component 20 and the liner 101, and prevent the liquid of the liner 101 from leaking. The plug 23 is connected with the guide rod 22. The plug 23 has a through circular hole locking hole 231, the guide rod 22 is inserted into the locking hole 231, the terminal portion 2212 extends out of the insulating layer 222 and the plug 23 at the same time, and the exposed terminal portion 2212 is convenient to be connected with an external power wire.

Specifically, the locking screw 223 is connected to the locking hole 231 so that the guide bar 22 is fixedly connected to the plug 23. The locking hole 231 is a round hole, a thread matched with the locking thread 223 is arranged in the locking hole 231, the connection of the locking hole 231 and the anti-corrosion rod 21 is the same as that of the guide rod 22, the thread in the locking hole 231 is pressed with the locking thread 223, so that the stability of the guide rod 22 and the plug 23 can be improved, and the tightness between the guide rod 22 and the locking hole 231 can be improved.

Further, the plug 23 includes a step 232 and a body 233, and the step 232 and the body 233 are independent from each other to be separated. The locking hole 231 is provided at both the step 232 and the body 233, and the locking hole 231 is provided at the center of the body 233 and the step 232. The guide rod 22 is sleeved with the guide rod sealing ring 24, the guide rod sealing ring 24 is located between the body 233 and the step 232, the body 233 and the step 232 can move in relative positions through threaded connection of the locking hole 231 and the locking thread 223, so that the body 233 and the step 232 can apply a clamping force to the guide rod sealing ring 24 located between the body 233 and the step 232, and the tightness between the guide rod 22 and the locking hole 231 can be effectively improved by matching with threaded connection of the locking hole 231 and the locking thread 223. Illustratively, a mounting position of the rod sealing ring 24 is further provided on the body 233, and the rod sealing ring 24 can be embedded on the body 233 and approach the body 233 by the step 232 to clamp the rod sealing ring 24. The body 233 is also provided with a mounting position of the guide rod sealing ring 24, so that the position of the guide rod sealing ring 24 is more accurate, and the pressing sealing effect is better.

In some embodiments of the present application, as shown in fig. 4 and 5, a drain is provided at the bottom of the inner container 101, and the drain communicates with the water storage chamber. The anti-corrosion component 20 stretches into the water storage cavity from the sewage outlet, so that the number of holes in the inner container 101 is reduced, the risk of water leakage is reduced, and the cost is saved. Illustratively, the bottom of the liner 101 is also provided with a water outlet pipe 103 and a water inlet pipe 104, such that the water outlet pipe 103 and the water inlet pipe 104 extend into the water storage cavity from the bottom of the liner 101. Wherein, in the vertical direction, the end surface of the water inlet pipe 104 extending into the water storage cavity is lower than the heating pipe 106.

More specifically, the body 233 has a recess 2331, the recess 2331 being provided on a side of the body 233 facing away from the step 232. The recess 2331 is formed with an opening in the surface of the plug 23, with the open end of the recess 2331 facing the corrosion protection rod 21. The drain bottom of recess 2331 is installed and is equipped with end cap sealing washer 25, in addition, is equipped with seal screw thread 2332 on the inner wall of recess 2331, and the drain is packed into in recess 2331 to through seal screw thread 2332 with anticorrosive subassembly 20 fixed connection on the drain, and the drain can pressfitting on end cap sealing washer 25 in order to guarantee the leakproofness of anticorrosive subassembly 20 and drain, prevent the liquid seepage of inner bag 101.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A corrosion protection assembly, comprising:

the anti-corrosion rod (21) is internally provided with mounting holes (212) penetrating through two ends of the anti-corrosion rod (21) along the extending direction;

The guide rod (22), the guide rod (22) is arranged in the mounting hole (212) in a penetrating mode, the guide rod (22) comprises a detection rod (221) and an insulating layer (222), and the insulating layer (222) covers the detection rod (221) so as to isolate the detection rod (221) from the anti-corrosion rod (21); one end of the detection rod (221) extends out of the insulating layer (222) and the anti-corrosion rod (21) to form a detection part (2211); the detection unit (2211) is used for contacting with water in the inner container (101).

2. The corrosion protection assembly according to claim 1, wherein the insulating layer (222) is detachably connected to the corrosion protection rod (21).

3. The corrosion protection assembly according to claim 2, wherein the mounting hole (212) is a circular hole, and an inner thread (211) is provided on an inner wall of the mounting hole (212); the insulating layer (222) is cylindrical, and the insulating layer (222) is provided with locking threads (223) which are connected with the internal threads (211) in a matching way.

4. A corrosion protection assembly according to claim 3, wherein the internal thread (211) is provided on the inner wall of one end of the mounting hole (212), and the locking thread (223) is provided on the side of the insulating layer (222) which is remote from the end of the detecting rod (221) which protrudes.

5. The corrosion protection assembly according to claim 3 or 4, further comprising a plug (23) connected to the guide bar (22), the plug (23) having a locking hole (231) therethrough;

The guide rod (22) is arranged in the locking hole (231) in a penetrating mode, and the other end of the detection rod (221) extends out of the insulating layer (222) and the plug (23) to form a terminal part (2212).

6. The corrosion protection assembly according to claim 5, wherein the locking hole (231) is a circular hole, and the locking thread (223) is connected with the locking hole (231) so that the guide rod (22) is fixedly connected with the plug (23).

7. The corrosion protection assembly according to claim 6, wherein the plug (23) comprises a body (233) and a step (232), the guide rod (22) is sleeved with a guide rod sealing ring (24), the guide rod sealing ring (24) is located between the body (233) and the step (232), and the body (233) and the step (232) can clamp the guide rod sealing ring (24).

8. The anti-corrosion assembly according to claim 7, wherein a groove (2331) is arranged on one side of the body (233) facing away from the step (232), a plug sealing ring (25) is arranged at the bottom of the groove (2331), and sealing threads (2332) are arranged on the inner wall of the groove (2331).

9. A water heater, comprising:

the inner container (101) is internally provided with a water storage cavity;

The heating pipe (106) is arranged in the water storage cavity; and

The anti-corrosion assembly according to any one of claims 1-8, being mounted in the liner (101), the guide bar (22) being vertically arranged in the water storage chamber.

10. The water heater according to claim 9, wherein the detection rod (221) is a corrosion-resistant metal rod, the detection portion (2211) is higher than the heating pipe (106), and a gap is provided between the detection portion (2211) and an inner wall of the inner container (101).