Electric water heater for train

Abstract

The electric water heater for the train comprises a heating box and a water storage tank, a water supply pipe is arranged between the heating box and the water storage tank, a partition plate is arranged in the heating box and divides the heating box into an upper cavity and a lower cavity from top to bottom, a through hole is formed in the partition plate, and a pressure relief assembly is arranged on the partition plate; the pressure relief assembly enables the upper cavity to be communicated with the lower cavity, a guide plate is arranged in the water storage tank and divides the water storage tank into a condensation chamber and a water storage chamber from top to bottom, and the upper cavity is connected with the condensation chamber through a pipeline. The electric water heater has the effect of improving the safety of the electric water heater for the train.

Description

Technical Field

[0001] This application relates to the technical field of drinking water equipment, and particularly to an electric water heater for trains. Background Art

[0002] An electric water heater refers to a water heater that uses electricity as an energy source for heating. With the continuous development of the times, people's demand for the supply of drinking water on trains has gradually increased.

[0003] In the prior art, the drinking fountains provided on trains are mainly divided into two parts, one is a water filtration device, and the other is an electric heating device. The filtration device is used to filter the drinking water source of the train, and then it reaches the heating tank through a pipeline, and the heating device heats it.

[0004] In order to facilitate people's use of hot water at any time, the drinking fountains on trains need to continuously heat the water. During this process, a lot of hot air will be generated in the heating tank, and then the pressure of the heating tank will continuously increase, exceeding the safety threshold of the heating tank, causing potential safety hazards. Utility Model Content

[0005] In order to improve the safety of the electric water heater for trains, this application provides an electric water heater for trains.

[0006] The electric water heater for trains provided by this application adopts the following technical solutions:

[0007] An electric water heater for trains includes a heating tank and a water storage tank. A water supply pipe is provided between the heating tank and the water storage tank. A partition plate is arranged in the heating tank, and the partition plate divides the heating tank into an upper chamber and a lower chamber from top to bottom. Through holes are formed in the partition plate, and a pressure relief component is arranged on the partition plate. The pressure relief component communicates the upper chamber with the lower chamber. A guide plate is arranged in the water storage tank, and the guide plate divides the water storage tank into a condensation chamber and a water storage chamber from top to bottom. The upper chamber is connected to the condensation chamber through a pipeline.

[0008] By adopting the above technical solutions, when the water in the heating tank is almost used up, the water in the water storage tank can add water to the heating tank through the water supply pipe. When the water in the heating tank is continuously heated, a lot of water vapor will be generated, which will cause the pressure in the lower chamber to rise. The water vapor in the lower chamber is transmitted to the upper chamber through the pressure relief component, and then diffused to the condensation chamber through the pipeline to complete pressure relief, thereby improving the safety of the electric water heater. When the water vapor reaches the condensation chamber, the water vapor is liquefied into water through condensation, and then through the guide plate, the water converges into the water storage chamber to realize circulation, thereby saving resources.

[0009] Optionally, the pressure relief assembly includes a sealing plate and a guide cylinder, the guide cylinder is fixedly connected to the through hole, the outer diameter of the guide cylinder is consistent with the through hole, a plurality of receiving blocks are fixedly connected to the guide cylinder, the sealing plate is slidably arranged in the guide cylinder, and the outer diameter of the sealing plate is consistent with the inner diameter of the guide cylinder, the sealing plate is fitted with the receiving block, a connecting rod is passed through the receiving block, one end of the connecting rod close to the lower chamber is fixedly connected to a first float, and the other end is fixedly connected to a stop block, the first float and the stop block correspond one-to-one to the receiving block, and the sealing plate is located between the stop block and the receiving block.

[0010] By adopting the above technical scheme, when the water in the lower chamber is not used by guests, the first float rises with the rising water level, and the connecting rod slides on the block, so the connecting rod fixedly connected to the first float will also rise accordingly. The continuous heating of water will generate a large amount of water vapor. Due to the air pressure, the pressure will push open the sealing plate slidably connected in the guide cylinder, and the connecting rod on the sealing plate provides an upward sliding stroke for the sealing plate, so that the sealing plate can only slide with the connecting rod without rotating. When the height of the sealing plate exceeds that of the guide cylinder, the water vapor in the lower chamber will come to the upper chamber, thereby completing the pressure relief of the lower chamber, thereby improving the safety of the electric water heater.

[0011] Optionally, a distance sensor is provided on the side of the stopper away from the blocking plate, a solenoid valve is provided on the water supply pipe, and the distance sensor is electrically connected to the solenoid valve.

[0012] By adopting the above technical solution, when the hot water in the lower chamber is almost used up, the first float will descend with the connecting rod, and the block will also descend accordingly. The value read by the distance sensor on the block will increase. However, considering that the train will be bumpy during the journey, causing the water in the lower chamber to shake, the float will also slide up and down. Therefore, when the value read by the distance sensor reaches a predetermined value and remains for a period of time, the solenoid valve electrically connected to the distance sensor will open, allowing the water in the water storage chamber to reach the lower chamber through the water supply pipe.

[0013] Optionally, a refrigeration plate is provided in the condensing chamber, a pressure relief pipe is provided in the condensing chamber, the pressure relief pipe is located at the top of the water storage tank, and a safety pressure relief valve is provided on the pressure relief pipe.

[0014] By adopting the above technical solution, water vapor will reach the condensation chamber through the pipeline, and the refrigeration plate will quickly cool the water vapor in the condensation chamber to liquefy it. When the pressure is too high or the refrigeration plate is damaged, the pressure in the condensation chamber is close to the pressure in the upper and lower chambers, and the safety valve on the condensation chamber will open to release the pressure, thereby improving the safety of the electric water heater when in use.

[0015] Optionally, a water outlet is provided on the deflector, and a water collecting cylinder is fixedly connected to the water outlet. A water discharging cylinder is fixedly connected inside the water collecting cylinder. One end of the water discharging cylinder is open and the opening end faces the water storage chamber. A number of water discharging holes are provided along the axial direction of the water discharging cylinder and away from the opening end. A plugging cylinder is slidably sleeved outside the water discharging cylinder. The inner diameter of the plugging cylinder is the same as the outer diameter of the water discharging cylinder, and the outer diameter of the plugging cylinder is smaller than the inner diameter of the water collecting cylinder. One end of the plugging cylinder facing the water storage chamber is open, and a number of plugging holes are provided along its axial direction near the opening. The plugging holes correspond to the water discharging holes one by one. A second floating ball is provided at the end of the plugging cylinder away from the opening. A cord is provided between the second floating ball and the plugging cylinder. One end of the cord is fixedly connected to the plugging cylinder, and the other end is fixedly connected to the second floating ball.

[0016] By adopting the above technical solution, water vapor reaches the condensation chamber through the pipeline. The refrigerating sheet reduces the temperature in the condensation chamber, thereby liquefying the water vapor into water. The water is concentrated in the water collecting cylinder through the deflector. When the water level in the condensation chamber rises slowly, the second floating ball will also rise accordingly. Under the influence of buoyancy, the second floating ball drives the plugging cylinder to slide on the water discharging cylinder and move upward along the axial direction of the water discharging cylinder. When the plugging holes on the plugging cylinder correspond to the water discharging holes on the water discharging cylinder, the water in the condensation chamber reaches the water storage chamber through the plugging holes and the water discharging holes, thus realizing the recycling of resources.

[0017] Optionally, a plugging block is fixedly connected to the end of the water collecting cylinder away from the water storage chamber.

[0018] By adopting the above technical solution, when the second floating ball drives the plugging cylinder to rise under the influence of buoyancy, the plugging block fixedly connected to the inner side of the water collecting cylinder can make the plugging cylinder always slide on the water discharging cylinder, thereby reducing the possibility of the plugging cylinder slipping off the water discharging cylinder.

[0019] Optionally, a water collecting pipe is inclined on the upper chamber. One end of the water collecting pipe is communicated with the upper chamber, and the other end is connected to the water supply pipe. The partition plate is inclined in the heating box, and the side close to the water collecting pipe is lower than the opposite side of the water collecting pipe.

[0020] By adopting the above technical solution, when the lower chamber is depressurized, the water vapor will come to the upper chamber and then reach the condensation chamber. However, the water vapor in the upper chamber will also liquefy after a long time, thus liquefying into water and then dripping onto the partition plate. Since one end of the partition plate is high and the other end is low, the water falling on the partition plate will be concentrated at the lower part of the partition plate and then reach the water supply through the water collecting pipe, thus realizing the recycling of resources.

[0021] Optionally, an inner tank is provided in the lower chamber, and the inner tank fits with each inner side surface of the lower chamber.

[0022] By adopting the above technical solution, the inner tank in the lower chamber can increase its pressure threshold.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the water in the heating box is almost used up, the water in the water storage tank can be used to add water to the heating box through the water supply pipe. When the water in the heating box is heated, a lot of water vapor will be generated, which will cause the pressure in the lower chamber to increase. The water vapor in the lower chamber is transferred to the upper chamber through the pressure relief component, and then the water vapor is diffused to the condensation chamber through the pipeline to complete the pressure relief, thereby improving the safety of the electric water heater. When the water vapor reaches the condensation chamber, it is liquefied into water through condensation, and then the water is gathered into the water storage chamber through the guide plate to realize circulation, thereby saving resources;

[0025] 2. When the water in the lower chamber is not used by guests, the first float rises with the rise of water level, and the connecting rod slides on the block, so the connecting rod fixedly connected to the first float will also rise. The water will continue to be heated to generate a large amount of water vapor. Due to the air pressure, the pressure will push open the sealing plate slidably connected in the guide cylinder, and the connecting rod on the sealing plate provides an upward sliding stroke for the sealing plate, so that the sealing plate can only slide with the connecting rod without rotating. When the height of the sealing plate exceeds the guide cylinder, the water vapor in the lower chamber will come to the upper chamber, thereby completing the pressure relief of the lower chamber, thereby improving the safety of the electric water heater;

[0026] 3. Water vapor reaches the condensation chamber through the pipeline, and the refrigeration plate reduces the temperature in the condensation chamber, thereby liquefying the water vapor into water, and the water is concentrated in the water collecting cylinder through the guide plate. When the water level in the condensation chamber slowly rises, the second float will also rise accordingly. Under the influence of buoyancy, the second float carries the blocking cylinder to slide on the drain cylinder and moves upward along the axial direction of the drain cylinder. When the blocking hole on the blocking cylinder corresponds to the drain hole on the drain cylinder, the water in the condensation chamber reaches the water storage chamber through the blocking hole and the drain hole, thereby realizing the recycling of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the connection between the heating box and the water storage tank.

[0028] Figure 2 It is a schematic diagram of the half-section structure of the heating box and the water storage tank.

[0029] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0030] Figure 4 room Figure 2 Enlarged view of point B in the middle.

[0031] Description of reference numerals: 1. Heating box; 11. Upper chamber; 12. Lower chamber; 2. Water storage tank; 21. Condensation chamber; 211. Refrigeration sheet; 212. Pressure relief pipe; 213. Safety pressure relief valve; 22. Water storage chamber; 3. Pressure relief assembly; 31. Guide cylinder; 32. First floating ball; 33. Connecting rod; 34. Block; 35. Distance sensor; 36. Sealing plate; 37. Bearing block; 4. Water collecting cylinder; 41. Sealing cylinder; 411. Sealing hole; 42. Wire rope; 43. Second floating ball; 44. Drainage cylinder; 441. Drainage hole; 45. Sealing block; 5. Inner tank; 6. Water collecting pipe; 7. Water supply pipe; 8. Partition plate; 9. Flow guide plate. Detailed implementation manners

[0032] The following further describes the present application in conjunction with the attached Figures 1 - 4 drawings.

[0033] An embodiment of the present application discloses an electric water heater for trains.

[0034] Referring to Figure 1 and Figure 2 , an electric water heater for trains includes a heating box 1 and a water storage tank 2. A partition plate 8 is arranged in the heating box 1, and the partition plate 8 divides the heating box 1 into an upper chamber 11 and a lower chamber 12 from top to bottom. A flow guide plate 9 is arranged in the water storage tank 2, and the flow guide plate 9 divides the water storage tank 2 into a condensation chamber 21 and a water storage chamber 22 from top to bottom. The partition plate 8 is provided with a pressure relief assembly 3, and the pressure relief assembly 3 communicates the upper chamber 11 with the lower chamber 12. A pipeline is connected between the upper chamber 11 and the condensation chamber 21, and a water supply pipe 7 is connected between the lower chamber 12 and the water storage chamber 22. A water pump is arranged on one side of the water supply pipe 7 close to the water storage tank 2, and a first solenoid valve is arranged on one side close to the heating box 1. The water in the water storage chamber 22 reaches the lower chamber 12 through the water supply pipe 7. After the water in the lower chamber 12 is heated and raised in temperature, it can be normally used by people on the train. During the heating process, more and more water vapor is generated in the lower chamber 12, resulting in an increase in pressure in the lower chamber 12. When a certain threshold is reached, the pressure relief assembly 3 relieves the pressure. The water vapor in the lower chamber 12 reaches the upper chamber 11 through the pressure relief assembly 3, and then reaches the condensation chamber 21 through the pipeline, thereby realizing the pressure relief of the lower chamber 12, and improving the safety of the electric water heater. The water vapor cools down in the condensation chamber 21, liquefies the water vapor into water, and then through the flow guide plate 9, the water is converged into the water storage chamber 22 to realize circulation, thereby saving resources.

[0035] Referring to Figure 2 and Figure 3, the pressure relief component 3 includes a plugging plate 36 and a guiding cylinder 31. A through hole is formed in the partition plate 8. The guiding cylinder 31 is fixedly connected to the partition plate 8 and is coaxially arranged with the through hole. A plurality of receiving blocks 37 are fixedly connected to the inner side of the guiding cylinder 31 and close to the lower chamber 12. The plugging plate 36 is arranged on the receiving blocks 37. A connecting rod 33 is slidably inserted through the plugging plate 36 along the height direction of the heating box 1. One end of the connecting rod 33 is fixedly connected with a first floating ball 32, and the other end is fixedly connected with a stop block 34. The first floating ball 32 is located in the lower chamber 12. The plurality of receiving blocks 37 correspond to the connecting rod 33 one by one and the connecting rod 33 is slidably connected to the receiving blocks 37. A distance sensor 35 is fixedly connected to the side of the stop block 34 close to the inner top wall of the upper chamber 11. An inner container 5 is arranged in the lower chamber 12, and the inner container 5 is attached to each inner side surface of the lower chamber 12. One end of the partition plate 8 facing the upper chamber 11 is high and the other end is low. A water collecting pipe 6 is arranged on the heating box 1 close to the lower side of the partition plate 8. A second solenoid valve is arranged on the water collecting pipe 6, and a pressure relief pipe 212 is arranged on the top wall of the condensation chamber 21. A safety pressure relief valve 213 is arranged on the pressure relief pipe 212.

[0036] Refer to Figure 2 and Figure 3 , when the water in the lower chamber 12 is heated, a large amount of water vapor will be generated, thereby increasing the pressure in the lower chamber 12. At this time, when the water in the lower chamber 12 reaches the rated water level, the first floating ball 32 floats on the water surface under the action of buoyancy. Due to the sliding connection between the receiving block 37 and the connecting rod 33, the first floating ball 32 can rise or fall with the height of the water level in the lower chamber 12 and will not be affected by the shaking of the water caused by the bumps during the train's travel. When the pressure in the lower chamber 12 reaches a certain threshold value, and the inner container 5 can increase the pressure threshold value, the air pressure pushes the plugging plate 36 to slide in the guiding cylinder 31. At this time, the connecting rod 33 gives the displacement stroke of the plugging plate 36. When the plugging plate 36 slides out of the guiding cylinder 31 under the action of air pressure, the upper chamber 11 is communicated with the lower chamber 12, and the water vapor passes through the guiding cylinder 31 to reach the upper chamber 11, and then reaches the condensation chamber 21 through the pipeline to achieve pressure relief. The water vapor in the upper chamber 11 will also liquefy into water. When it falls on the partition plate 8, the water will flow to the lower place and then reach the water supply pipe 7 through the water collecting pipe 6 to achieve circulation.

[0037] Refer to Figure 2 and Figure 3, when using hot water, the water level in the lower chamber 12 will decrease accordingly, and the first floating ball 32 will also decrease. The connecting rod 33 fixedly connected to the first floating ball 32 will move downward along the height direction of the heating tank 1. At this time, the stop block 34 also moves downward following the connecting rod 33, and the value read by the distance sensor 35 fixedly connected to the stop block 34 changes. Since the train may jolt during driving, when it drops to a certain height, when the value read by the distance sensor 35 is within a certain range and remains for a period of time, the solenoid valve and the water pump electrically connected to the water supply pipe 7 are opened, so that the water in the water storage chamber 22 reaches the lower chamber 12 through the water supply pipe 7, thus realizing the function of water replenishment. When the pressure is too high or the refrigeration sheet 211 is damaged, causing the water vapor in the condensation chamber 21 to not be liquefied in time, when the pressures in the upper chamber 11, the lower chamber 12 and the condensation chamber 21 are close to being the same, the safety valve on the condensation chamber 21 opens to relieve pressure, thereby improving the safety of using the electric water heater.

[0038] Refer to Figure 2 and Figure 4 , a flow guide plate 9 is arranged in the water storage tank 2. The flow guide plate 9 divides the water storage tank 2 into a condensation chamber 21 and a water storage chamber 22 from top to bottom. A refrigeration sheet 211 is arranged in the condensation chamber 21. There is a water outlet on the flow guide plate 9. A water collecting cylinder 4 is fixedly connected at the water outlet. A drain cylinder is fixedly connected in the water collecting cylinder 4. One end of the drain cylinder is open and the open end faces the water storage chamber 22. A plurality of drain holes are arranged along the axial direction of the drain cylinder and away from the open end. A plugging cylinder 41 is slidably sleeved outside the drain cylinder. The inner diameter of the plugging cylinder 41 is the same as the outer diameter of the drain cylinder and the outer diameter of the plugging cylinder 41 is smaller than the inner diameter of the water collecting cylinder 4. One end of the plugging cylinder 41 facing the water storage chamber 22 is open, and a plurality of plugging holes 411 are arranged along its axial direction near the opening. The plugging holes 411 correspond to the drain holes one by one. A plugging block 45 is fixedly connected to the end of the water collecting cylinder 4 away from the water storage chamber 22. A wire rope 42 is arranged on the side of the plugging cylinder 41 close to the condensation chamber 21. One end of the wire rope 42 is fixedly connected to the plugging cylinder 41, and the other end is fixedly connected to a second floating ball 43.

[0039] Refer to Figure 2 and Figure 4 , when the water vapor reaches the condensation chamber 21 through the pipeline, the refrigeration sheet 211 works to cool down the water vapor, so that the water vapor is liquefied into water and falls onto the flow guide plate 9. At this time, since the plugging cylinder 41 is attached to the drain cylinder 44, it converges in the water collecting cylinder 4. When the water accumulates more, the water level begins to rise, and the second floating ball 43 begins to rise following the rise of the water level. When it reaches the length of the wire rope 42, under the action of buoyancy, the second floating ball 43 drives the wire rope 42 and the plugging cylinder 41 to move upward. When the drain holes 441 are communicated with the plugging holes 411, the water in the water collecting cylinder 4 reaches the water storage chamber 22 through the plugging holes 411 and the drain holes 441, thus realizing the recycling of resources.

[0040] The implementation principle of an electric water heater for trains in an embodiment of this application is as follows:

[0041] When the water pump and the first solenoid valve on the water supply pipe 7 are opened, the water in the water storage chamber 22 flows through the water supply pipe 7 towards the lower chamber 12 of the heating tank 1, and the lower chamber 12 heats the water to meet the water usage requirements of the train passengers. When the water in the water storage chamber 22 flows into the lower chamber 12, the first float ball 32 will rise as the water level rises. At this time, the connecting rod 33 will also rise. When continuously heating the water in the lower chamber 12, the water vapor in the lower chamber 12 will increase, and the pressure will also increase, resulting in a pressure difference between the pressure in the lower chamber 12 and the pressure in the upper chamber 11. At this time, under the action of the pressure, the sealing plate 36 will slide on the connecting rod 33. When the sliding distance exceeds the guide cylinder 31, the water vapor in the lower chamber 12 will flow through the guide cylinder 31 into the upper chamber 11, and the upper chamber 11 allows the water vapor to flow into the condensation chamber 21 through a pipe. The refrigerating sheet 211 in the condensation chamber 21 makes the temperature in the condensation chamber 21 lower than that of other chambers, thereby liquefying the water vapor into water.

[0042] When the passengers on the train are using water, the water level in the lower chamber 12 begins to drop, and the first float ball 32 will also drop accordingly, and the connecting rod 33 will also drop. When the first float ball 32 drops to a certain height, the distance sensor 35 installed on the stop block 34 can measure the distance to the inner top wall of the heating tank 1. Since the train is prone to jolting during forward movement, the water in the lower chamber 12 is likely to shake, and the shaking will make the value of the distance sensor 35 inaccurate. Therefore, when measuring the data, a certain value needs to be within a certain range and maintained for a period of time to accurately control the first solenoid valve on the water supply pipe 7.

[0043] When the water vapor in the condensation chamber 21 liquefies into water, it will be concentrated in the guide tube through the guide plate 9. When the water in the guide tube reaches a certain water level, the second float ball 43 on the plugging tube 41 will rise as the water level rises, causing the plugging tube 41 to slide on the drain tube 44. When the second float ball 43 drives the plugging tube 41 to rise to a certain position, an intersecting area appears between the plugging hole 411 and the drain hole 441. At this time, the water gathered in the gathering tube will reach the water storage chamber 22 through the plugging hole 411 and the drain hole 441.

[0044] The water vapor in the upper chamber 11 will also liquefy, and the liquefied water will flow along the guide of the partition plate 8, causing the water to gather at the lower part of the partition plate 8. A water collecting pipe 6 is provided at the lower end of the partition plate 8, and the water reaches the water supply pipe 7 through the water collecting pipe 6.

[0045] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An electric water heater for trains, characterized in that: The invention comprises a heating box (1) and a water storage tank (2), wherein a water supply pipe (7) is arranged between the heating box (1) and the water storage tank (2), a partition plate (8) is arranged inside the heating box (1), and the partition plate (8) divides the heating box (1) from top to bottom into an upper chamber (11) and a lower chamber (12), a through hole is opened on the partition plate (8), a pressure relief component (3) is arranged on the partition plate (8), and the pressure relief component (3) makes the upper chamber (11) communicate with the lower chamber (12), a guide plate (9) is arranged inside the water storage tank (2), and the guide plate (9) divides the water storage tank (2) from top to bottom into a condensation chamber (21) and a water storage chamber (22), and the upper chamber (11) and the condensation chamber (21) are connected by a pipeline.

2. The electric water heater for train according to claim 1, characterized in that: The pressure relief assembly (3) comprises a blocking plate (36) and a guide cylinder (31). The guide cylinder (31) is fixedly connected to the partition plate (8). The outer diameter of the guide cylinder (31) is consistent with the through hole. A plurality of receiving blocks (37) are fixedly connected to the guide cylinder (31). The blocking plate (36) is slidably arranged in the guide cylinder (31). The outer diameter of the blocking plate (36) is consistent with the inner diameter of the guide cylinder (31). The blocking plate (36) fits the receiving block (37). A connecting rod (33) is passed through the receiving block (37). One end of the connecting rod (33) close to the lower chamber (12) is fixedly connected to a first floating ball (32), and the other end is fixedly connected to a stopper (34). The first floating ball (32) and the stopper (34) both correspond to the receiving block (37) one by one. The blocking plate (36) is located between the stopper (34) and the receiving block (37).

3. The electric water heater for train according to claim 2, characterized in that: A distance sensor (35) is provided on the side of the stopper (34) away from the blocking plate (36), a solenoid valve is provided on the water supply pipe (7), and the distance sensor (35) is electrically connected to the solenoid valve.

4. The electric water heater for train according to claim 1, characterized in that: A refrigeration plate (211) is provided in the condensing chamber (21), a pressure relief pipe (212) is provided in the condensing chamber (21), the pressure relief pipe (212) is located at the top of the water storage tank (2), and a safety pressure relief valve (213) is provided on the pressure relief pipe (212).

5. The electric water heater for train according to claim 1, characterized in that: The guide plate (9) is provided with a water outlet, a water collecting cylinder (4) is fixedly connected to the water outlet, a drain cylinder (44) is fixedly connected inside the water collecting cylinder (4), one end of the drain cylinder (44) is open and the open end faces the water storage chamber (22), a plurality of drain holes (441) are provided along the axial direction and away from the open end of the drain cylinder (44), a sealing cylinder (41) is provided on the outer sliding sleeve of the drain cylinder (44), the inner diameter of the sealing cylinder (41) is consistent with the outer diameter of the drain cylinder (44) and the outer diameter of the sealing cylinder (41) is smaller than the outer diameter of the collecting cylinder (4). The inner diameter of the water cylinder (4), the sealing cylinder (41) is opened at one end toward the water storage chamber (22), and a plurality of sealing holes (411) are opened along its axial direction near the opening, the sealing holes (411) correspond one to one with the drain holes (441), a second float (43) is provided at the end of the sealing cylinder (41) away from the opening, a string (42) is provided between the second float (43) and the sealing cylinder (41), one end of the string (42) is fixedly connected to the sealing cylinder (41), and the other end is fixedly connected to the second float (43).

6. The electric water heater for trains according to claim 5, characterized in that: One end of the water collecting cylinder (4) away from the water storage chamber (22) is fixedly connected to a blocking block (45).

7. The electric water heater for train according to claim 1, characterized in that: A water collecting pipe (6) is obliquely arranged on the upper chamber (11), one end of the water collecting pipe (6) is connected to the upper chamber (11), and the other end is connected to the water supply pipe (7), and the partition plate (8) is obliquely arranged in the heating box (1), and the side close to the water collecting pipe (6) is lower than the opposite side of the water collecting pipe (6).

8. The electric water heater for train according to claim 1, characterized in that: An inner liner (5) is arranged in the lower chamber (12), and the inner liner (5) is in contact with each inner side surface of the lower chamber (12).

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