CN106524517B - A water heater control method - Google Patents

Abstract

The invention relates to a water heater, which comprises a shell, wherein an inner container is arranged in the shell, the inner container consists of a left end enclosure, a right end enclosure and an inner container middle barrel, the bottom of the inner container is provided with a water inlet pipe, a water outlet pipe and a drain outlet, the drain outlet is connected with a drain pipe, the drain pipe is provided with a drain valve for controlling the connection and disconnection of the drain pipe, the water outlet pipe extends from the bottom of the inner container to the top space of the inner container, the drain outlet is arranged at the lowest point of the bottom of the inner container, and the bottom of the inner container is upwards inclined along. The water heater utilizes the action of gravity of impurities and water scales to deposit near the sewage outlet, and the impurities and the water scales in the inner container can be discharged out of the inner container through the sewage discharge pipe, so that the functions of sewage discharge and cleaning are achieved. The water heater has the advantages of simple structure, good pollution discharge effect, strong practicability and low cost, and is suitable for production and popularization.

Description

A water heater control method

technical field

The invention relates to the field of water heaters, in particular to a control method of a water heater that is convenient for sewage discharge and free of cleaning.

Background technique

Water heaters bring great convenience to life. However, since domestic tap water contains various impurities and minerals, the water heater will produce a lot of scale and impurities after a period of use. At this time, the water heater needs to be drained. If the sewage treatment is not carried out for a long time, the inside of the water heater will not only become more and more dirty, thus affecting our health; it will also affect the service life and safety of the water heater, especially the inner tank of the water heater, which is the core component of the water heater. It directly affects the safety performance, service performance and working life of the water heater, so the internal cleaning of the water heater is the cleaning of the inner tank of the water heater.

As shown in FIG. 1 , the water heater currently used includes a shell, an inner tank, and a sewage pipe, a water inlet pipe and a water outlet pipe are arranged on the inner tank, and the water outlet pipe extends from the bottom of the inner tank to the top space of the inner tank. The sewage outlet of the inner tank is provided with a sewage valve, and the sewage valve controls the on-off state of the sewage pipe, and the sewage is discharged through the sewage pipe. However, the inner tank of the currently used water heater is composed of left and right heads and a barrel in the inner tank. The barrel in the inner tank is cylindrical. During the production process, the inner tank is placed vertically into the outer shell, which is easy to install and locate, and the production process After production, the water heater is installed horizontally and at the position specified by the user. During use, the scale on the inner wall and the heating tube will be deposited at the bottom of the inner tank, but if the inner tank is in a horizontal state, the scale will be affected by gravity. The bottom will naturally settle on the bottom surface of the entire middle bucket. During the sewage discharge process, only the dirt in a small range around the sewage outlet can be discharged. The dirt in other positions will flow out under the action of the flow of water, even if a cleaning device is installed. It can comprehensively discharge the impurities and scale in the inner tank, the scope of sewage discharge is limited to a small area around the cleaning device, and the long-term deposited scale is difficult to be cleaned by flushing, so the sewage discharge effect is not ideal.

The present invention has been made in view of this.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a water heater, which can ensure that the sewage outlet is arranged at the lowest part of the inner tank by placing the inner tank incline in the outer shell, so that impurities can flow to the direction of gravity under the action of gravity. The sewage outlet is discharged from the sewage pipe, and the invention also overcomes the problem of the installation of the inner liner in the production process. The water heater provided by the invention can facilitate sewage discharge and avoid the process of cleaning, and has the advantages of simple structure, low cost and convenient use.

In order to achieve this purpose, the present invention adopts the following technical scheme: a water heater, including a shell, an inner tank is arranged in the outer shell, the inner tank is composed of left and right sealing heads and a barrel in the inner tank, and the bottom of the inner tank is provided with a water inlet pipe, A water outlet pipe and a sewage outlet, the sewage outlet is connected with the sewage pipe, the sewage pipe is provided with a sewage valve for controlling the connection and disconnection of the sewage pipe, and the water outlet pipe extends from the bottom of the inner tank to the top space of the inner tank, the said The sewage outlet is set at the lowest point of the bottom of the inner tank, and the bottom of the inner tank is inclined upward along the sewage outlet.

Further, the upward inclination angle of the bottom of the inner tank along the sewage outlet is less than 15°.

Further, the sewage outlet is arranged on the inner liner head or the inner liner barrel.

Preferably, when the sewage outlet is arranged on the inner tank head, the distance between the sewage outlet and the bottom end point of the inner tank head is less than 15 cm.

Further, the barrel in the inner tank is a cylindrical structure, and an angle β is set between the central axis of the barrel in the inner tank and the horizontal plane of the bottom of the shell, and 2°<β<10°.

Further, the distance between the sewage outlet and the bottom of the shell is L1, the distance between the highest part of the middle barrel of the inner tank and the bottom of the shell is L2, and the L1 is less than L2.

Preferably, the ratio of L1 to L2 is not less than 3 mm.

Further, the distance between the top of the inner tank and the top of the outer shell is not less than 25mm.

Further, the barrel in the inner tank is configured as a conical structure, and the conical structure is provided with a sewage outlet where the radius of the radial cross-section is the largest.

Further, in the sealing cone, the radius of the inner bladder head with the largest radial radius of the barrel is R1, and the radius of the inner bladder head at the other end of the plugging is R2, and the ratio of R2 to R1 is not less than 3 mm.

Further, the plane where the top of the middle barrel of the inner liner is located is a horizontal plane.

Further, a sedimentation tank is arranged at the bottom of the inner tank, and the sewage outlet is arranged at the bottom of the tank. The settling tank can be used to deposit impurities and scales, further ensuring the function of sewage.

The invention relates to the field of water heaters, in particular to a water heater with a sewage discharge function. In the invention, the sewage discharge port of the water heater is located at the lowest point of the bottom of the inner tank, and the bottom of the inner tank is inclined upward, which can facilitate the impurities and scale of the water heater to be discharged to the bottom of the water heater through its own gravity. Sedimentation at the sewage outlet, one of the solutions in the present invention is to make the barrel in the inner tank a cylindrical structure, and the entire inner tank is inclined to set an angle between the central axis of the barrel in the inner tank and the plane where the bottom of the shell is located to ensure that The impurities in the inner tank can be deposited at the sewage outlet. Another solution of the present invention is to set the barrel in the inner tank as a conical structure, and the radial section radius of the barrel in the inner tank changes gradually. For better installation, the plane where the top of the barrel in the inner tank is located is set as a horizontal plane , which is convenient for installation and positioning in the production process. In addition, a settling tank is arranged at the sewage outlet, and the sewage outlet is arranged at the bottom of the tank, which further ensures that impurities can be deposited at the sewage outlet of the inner tank and increases the storage space for impurities and scale. Valve, impurities are discharged through the sewage pipe, which realizes the function of convenient sewage discharge and no cleaning. At the same time, the present invention can also increase the cleaning steps to further ensure the effect of sewage discharge. The water heater of the invention has the advantages of simple structure, good sewage discharge effect, strong practicability and low cost, and is suitable for production and promotion.

After adopting the technical scheme of the present invention, the following beneficial effects are brought:

1. The water heater of the present invention is convenient for sewage discharge, and has a good sewage discharge effect, which ensures the service life of the water heater.

2. The water heater of the present invention is deposited on the sewage outlet by the gravity of the material, and the inner tank is directly discharged through the sewage pipe, so as to avoid the problem that impurities and scales are deposited on the bottom of the entire inner tank and it is difficult to clean the sewage.

3. The water heater of the present invention has simple structure, low cost and wide application range.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

Figure 1: Schematic diagram of the inner tank installation structure of the existing water heater;

Figure 2: a schematic diagram of the installation structure of the inner tank of the water heater provided by the present invention;

Figure 3: Schematic diagram of the installation structure of the water heater inner tank with cleaning function provided by the present invention;

Figure 4: Another solution provided by the present invention is a schematic diagram of the installation structure of the water heater inner tank;

Among them: 1. Outer shell, 2. Inner tank, 3. Water inlet pipe, 4. Water outlet pipe, 5. Sewage pipe, 6. Sewage valve, 7. Mixing valve, 8. Safety valve, 9. Solenoid valve, 10. Power supply board, 11, control board, 12, water pipeline, 13, heating pipe.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 2 to 4, a water heater provided by the present invention includes an outer shell 1, and the outer shell 1 is provided with an inner tank 2. The inner tank 2 is composed of left and right heads and a barrel in the inner tank. The head is used to block the left and right ends of the barrel in the inner tank 2. The left and right heads are arc structures. The bottom of the inner tank 2 is provided with a water inlet pipe 3, a water outlet pipe 4 and a sewage outlet. The sewage outlet is connected with the sewage pipe 5. The pipe 5 is provided with a sewage valve 6 for controlling the connection and disconnection of the sewage pipe 5, the water outlet pipe 4 extends from the bottom of the inner bladder 2 to the top space of the inner bladder 2, and the sewage outlet is arranged in the inner bladder 2. At the lowest point of the bottom, the bottom of the inner tank 2 slopes upward along the sewage outlet.

The upward inclination angle of the bottom of the inner pot 2 along the sewage outlet according to the present invention is less than 15°.

The sewage outlet according to the present invention is arranged at the head of the inner bladder 2 or the barrel in the inner bladder 2. Preferably, when the sewage outlet is arranged at the head of the inner bladder 2, the distance between the sewage outlet and the bottom end of the head of the inner bladder 2 is less than 15cm. It further ensures that the sewage outlet is at the lowest point at the bottom of the inner tank 2 .

Example 1

As shown in FIG. 2 , the water heater described in this embodiment further includes a heating pipe 13, which is connected to the power board 10. The heating pipe 13 is arranged on the higher side of the bottom of the inner tank 2 away from the outer casing 1, and enters the The water pipe 3 is arranged on the side of the inner tank 2 close to the heating pipe 13, the water inlet pipe 2 is provided with a water inlet valve and a safety valve 8, and the water outlet pipe 4 is provided with a water outlet valve, which leads to the water outlet valve to discharge the hot water in the inner tank 2. for users to use.

Alternatively, the water heater also includes a water mixing valve 7 and a tap water pipe, the mixing valve 7 is the water outlet valve, the water mixing valve 7 is a two-in and one-out regulating valve, and the two water inlets are respectively connected with the water outlet pipe 4 , the water pipe is connected, the water outlet is connected with the water outlet pipe, the other end of the water outlet pipe is connected with the nozzle, the warm water side is connected with the water outlet pipe, the water pipe is also connected with the water inlet pipe 3, the user can use the mixing valve 7 to mix the tap water and the hot water. The water is mixed to become the warm water of the temperature required by the user and is discharged through the water outlet pipe. In the long-term use process, impurities and scales are generated. The deposited impurities and scales are not easy to clean, and the problem that some dead corners of the inner tank 2 cannot be cleaned cannot be avoided. Therefore, in this embodiment, the scales and impurities are deposited by gravity. At the sewage outlet, then it is convenient to discharge sewage.

The barrel in the inner pot 2 in this embodiment is a cylindrical structure, and an angle β is defined between the central axis of the barrel in the inner pot 2 and the horizontal plane where the bottom of the outer shell 1 is located, and 2°<β<10°.

In this embodiment, the distance between the sewage outlet and the bottom of the outer casing 1 is L1, and the distance between the highest part of the barrel in the inner tank 2 and the bottom of the outer casing 1 is L2, and the L1 is smaller than the L2. L2 is not less than 3mm.

In this embodiment, the inner tank 2 of the water heater is installed in the outer shell 1 obliquely during the production process, and then the whole water heater is installed horizontally at the position required by the user, so as to ensure that the inner tank 2 of the water heater is in the bucket. There is an included angle between the axis and the horizontal plane where the bottom of shell 1 is located,

In this embodiment, the distance between the top of the inner tank 2 and the top of the outer shell 1 is not less than 25 mm, which further ensures the thermal insulation effect of the inner tank 2 of the water heater.

The structure of the water heater inner tank 2 in this embodiment leads to the sewage valve 6, and the impurities deposited around the sewage outlet are discharged through the sewage in the inner tank 2, so as to realize the function of water heater sewage discharge and no cleaning.

Embodiment 2

In this embodiment, a water pipe 12 is provided between the water inlet pipe 3 and the water outlet pipe 4 of the water heater, and an on-off control valve is arranged on the water pipe 12 to control the water heater to clean the inner tank 2 from the water inlet pipe 3 and the water pipe. At the same time, the water outlet pipe 4 is fed with water to flush the inner bladder 2, and the sewage is discharged from the sewage pipe 5.

In addition, the water outlet pipe 4 described in this embodiment is provided with a water outlet valve, and one end of the water conduit 12 connected to the water outlet pipe 4 is arranged between the water outlet valve and the water outlet of the inner bladder 2. When the inner bladder 2 is cleaned and drained, the water outlet The valve is closed.

In this embodiment, the water outlet valve is first closed, the on-off control valve is turned on, and then the water enters through the water inlet pipe 3, and the tap water enters the water outlet pipe 4 through the water inlet pipe 12, then the water inlet pipe 3 and the water outlet pipe 4 of the water heater are connected to the inner tank at the same time. 2 Enter the water, clean the inner tank 2, and finally discharge the sewage through the sewage pipe 5.

In this embodiment, the water outlet pipes 4 of the water heaters all extend from the bottom of the inner pot 2 to the top of the inner pot 2. The water outlet pipes 4 can spray water from a high place to form an umbrella shape, spread out to the surrounding, and can wash the inner pot in a wide range. 2, and then the bottom of the inner liner 2 is washed with water through the water inlet pipe 3, so as to realize the all-round cleaning of the inner liner 2 and ensure the cleaning effect of the inner liner 2.

Alternatively, the water heater described in this embodiment further includes a water mixing valve 7, a water outlet conduit and a tap water pipe. The water outlet is connected with the water outlet pipe 4 and the water pipe respectively, the water outlet is connected with the water outlet pipe, the warm water side is connected with the water outlet pipe, and the water pipe is also connected with the water inlet pipe 3. When the inner tank 2 is cleaned and drained, the mixing valve 7 is closed.

The water inlet pipe 3 described in this embodiment is provided with a safety valve 8 and a water inlet valve. The water inlet valve controls the on-off state of the tap water entering the inner pot 2. Before cleaning the inner pot 2, close the water inlet valve and open the drain valve 6. Drain the water in the inner tank 2.

In this embodiment, the water mixing valve 7 is closed, the water inlet valve and the on-off control valve are turned on, the tap water flows into the water inlet pipe 3 and the water outlet pipe 4 at the same time to clean the inner tank 2, and the sewage discharge valve 6 is turned on to remove the sewage from the sewage. Pipe 5 drains the sewage away. In this embodiment, the water heater uses the water outlet pipe 4 and the water inlet pipe 3 to simultaneously feed water into the inner bladder 2 to flush the inner bladder 2 wall.

Alternatively, the water inlet valve is arranged between the water passage 12 and the bottom of the inner tank 2, the on-off control valve is turned on, and the tap water flows into the inner tank 2 through the water inlet pipe 3, the water passage 12 and the water outlet pipe 4 for cleaning. This method mainly cleans the wall of the inner tank 2, and the effect of cleaning the water outlet pipe 4 and the water inlet pipe 3 at the same time is slightly worse, but this method can reduce part of the cleaning water and achieve the effect of water saving.

The barrel in the inner pot 2 in this embodiment is a cylindrical structure, and an angle β is defined between the central axis of the barrel in the inner pot 2 and the horizontal plane where the bottom of the outer shell 1 is located, and 2°<β<10°.

In this embodiment, the distance between the sewage outlet and the bottom of the outer casing 1 is L1, and the distance between the highest part of the barrel in the inner tank 2 and the bottom of the outer casing 1 is L2, and the L1 is smaller than the L2. L2 is not less than 3mm.

In this embodiment, the inner tank 2 of the water heater is installed in the outer shell 1 obliquely during the production process, and then the whole water heater is installed horizontally at the position required by the user, so as to ensure that the inner tank 2 of the water heater is in the bucket. There is an included angle between the axis and the horizontal plane where the bottom of shell 1 is located,

In this embodiment, the distance between the top of the inner tank 2 and the top of the outer shell 1 is not less than 25mm, and the thickness of the thermal insulation layers of other parts of the inner tank 2 is greater than a set value, which further ensures the thermal insulation effect of the inner tank 2 of the water heater. .

In this embodiment, not only impurities and scales are deposited near the sewage outlet through the inclined setting of the inner tank 2, but also the water inlet pipe 3 and the water outlet pipe 4 are simultaneously fed into the inner tank 2 to flush the inner tank 2, so as to further ensure the effect of sewage discharge. , and clean the inner tank 2 in all directions, while ensuring the overall cleanliness of the inner tank 2, prolonging the service life of the inner tank 2 and ensuring the user's health.

Embodiment 3

The water heater described in the second embodiment first discharges the water in the inner tank, and then enters the water to clean the sewage. During the drainage process, a drainage time can be set according to the water storage in the inner tank or a water level sensor can be set to detect and control the drainage time. The water heater includes a power supply board 10 and a control board 11. The power supply board 10 supplies power to each part of the water heater, the control board 11 is connected to the power supply board, and the on-off control valve is connected to the control board 11. Turn on and off the control valve. The control panel 11 can control the working mode of the water heater.

The method for cleaning sewage from the water heater described in this embodiment includes the following steps:

S1. The water heater stops heating, closes the mixing valve 7 and the water inlet valve, and stops the water supply to the inner tank 2;

S2, turn on the sewage valve 6, and the sewage and impurities in the inner tank 2 are discharged from the sewage pipe 5;

S3. After the sewage in the inner tank 2 is drained, turn on the on-off control valve and the water inlet valve, and start to feed water into the inner tank 2;

S4. The cold water in the tap water pipe enters the water inlet pipe 3, and passes through the water passage 12 to the water outlet pipe 4, so that the tap water enters the water from the water outlet pipe 4 and the water inlet pipe 3 at the same time and cleans the inner bladder, and discharges the sewage from the sewage pipe 5;

S5. After cleaning, close the on-off control valve and the water inlet valve, stop the water inlet, and close the drain valve 6 until all the water in the inner tank 2 is drained;

S6, turn on the water inlet valve, and start to feed water into the inner tank 2 until the target water level, the cleaning and sewage process ends, and the water heater enters the standby state.

In this embodiment, since a large amount of water is stored in the inner tank 2 of the water heater, if a certain amount of water is not discharged before cleaning, the water stored in the inner tank 2 will produce a great pressure on the water entering the water inlet pipe 3 and the water outlet pipe 4 , the water cannot be fed through the water outlet pipe 4, and the wall of the inner bladder 2 cannot be washed through the water inlet pipe 3 and the water outlet pipe 4. Therefore, in this embodiment, a certain amount of water should be discharged from the inner tank 2 before the cleaning process is performed.

Embodiment 4

As shown in FIG. 4 , the barrel in the inner tank 2 is configured as a conical structure, and the conical structure is provided with a sewage outlet at the largest radial section radius.

In this embodiment, the radius of the head of the inner bladder 2 with the largest radial radius of the barrel in the blocking cone is R1, and the radius of the head of the inner bladder 2 at the other end is R2, and the ratio of R2 to R1 is not less than 3mm . The left and right sealing heads and the inner liner 2 middle barrels form a closed space for the inner liner.

In this embodiment, the water heater is provided with a heating pipe 13, the heating pipe 13 is provided on the side of the head whose radius is R2, the heating pipe 13 is connected with the power board 10, and the water inlet pipe 3 is provided in the inner tank 2. The middle bucket is close to the side of the heating pipe 13. The water inlet pipe 3 is provided with a water inlet valve and a safety valve. .

Alternatively, the water heater also includes a water mixing valve 7 and a tap water pipe, the mixing valve 7 is the water outlet valve, the water mixing valve 7 is a two-in and one-out regulating valve, and the two water inlets are respectively connected with the water outlet pipe 4 , The tap water pipe is connected, the water outlet is connected with the water outlet pipe, the warm water side is connected with the water outlet pipe, the tap water pipe is also connected with the water inlet pipe 3, the user can use the mixing valve 7 to mix the tap water and hot water into the warm water of the temperature required by the user through the outlet water Catheter discharge. The water heater will generate a lot of impurities and scale during the long-term use of the user, and the impurities and scale will be deposited on the wall of the inner tank 2, which is not easy to clean. Even if the device for cleaning the inner tank 2 is used, it is still unavoidable The problem that some dead corners of the gallbladder 2 cannot be cleaned, so in this embodiment, the scale and impurities generated in the gallbladder 2 are deposited on the sewage outlet by the action of gravity, and then easily discharged through the sewage discharge pipe 5, thereby avoiding the large size of the gallbladder 2. area cleaning.

Alternatively, in this embodiment, a water pipe 12 is provided between the water inlet pipe 3 and the water outlet pipe 4 described in the water heater, and an on-off control valve is provided on the water pipe 12 to control the water heater from the water inlet pipe when cleaning the inner tank 2 3 and the water outlet pipe 4 simultaneously enter the water to wash the inner tank 2, and the sewage is discharged from the sewage pipe 5.

In addition, the water outlet pipe 4 described in this embodiment is provided with a water outlet valve, and one end of the water conduit 12 connected to the water outlet pipe 4 is arranged between the water outlet valve and the water outlet of the inner bladder 2. When the inner bladder 2 is cleaned and drained, the water outlet The valve is closed.

In this embodiment, the water outlet valve is first closed, the on-off control valve is turned on, and then the water enters through the water inlet pipe 3, and the tap water enters the water outlet pipe 4 through the water inlet pipe 12, then the water inlet pipe 3 and the water outlet pipe 4 of the water heater are connected to the inner tank at the same time. 2 Enter the water, clean the inner tank 2, and finally discharge the sewage through the sewage pipe 5. The sewage discharge effect of the inner tank 2 is further ensured, and some impurities and scales adhering to the inner tank 2 are washed away, so that the sewage discharge effect of the inner tank 2 is better.

In this embodiment, the water outlet pipe 4 of the water heater is used to extend from the bottom of the inner pot 2 to the top of the inner pot 2. The water outlet pipe 4 can spray water from a high place to form an umbrella shape, spread out to the surrounding, and can wash the inner pot 2 in a wide range. Then, the bottom of the inner tank 2 is washed with water through the water inlet pipe 3, so as to realize the all-round cleaning of the inner tank and ensure the cleaning effect of the inner tank.

Alternatively, the water heater described in this embodiment further includes a water mixing valve 7, a water outlet conduit and a tap water pipe. The water outlet is connected with the water outlet pipe 4 and the water pipe respectively, the water outlet is connected with the water outlet pipe, the warm water side is connected with the water outlet pipe, and the water pipe is also connected with the water inlet pipe 3. When the inner tank 2 is cleaned and drained, the mixing valve 7 is closed.

The water inlet pipe 3 described in this embodiment is provided with a safety valve 8 and a water inlet valve. The water inlet valve controls the on-off state of the tap water entering the inner pot 2. Before cleaning the inner pot 2, close the water inlet valve and open the drain valve 6. The water in the inner bladder 2 is discharged through the sewage pipe 5 .

In this embodiment, the water mixing valve 7 is closed, the water inlet valve and the on-off control valve are turned on, the tap water flows into the water inlet pipe 3 and the water outlet pipe 4 at the same time to clean the inner tank 2, and the sewage discharge valve 6 is turned on to remove the sewage from the sewage. Pipe 5 drains the sewage away. In this embodiment, the water heater uses the water outlet pipe 4 and the water inlet pipe 3 to simultaneously feed water into the inner bladder 2 to flush the inner bladder 2 wall.

Alternatively, the water inlet valve is arranged between the water passage 12 and the bottom of the inner tank 2, the on-off control valve is turned on, and the tap water flows into the inner tank 2 through the water inlet pipe 3, the water passage 12 and the water outlet pipe 4 for cleaning. This method mainly cleans the wall of the inner bladder 2, and the effect of cleaning the water outlet pipe 4 and the water inlet pipe 3 at the same time is slightly worse, but this method can achieve the effect of water saving.

Embodiment 5

As shown in FIG. 4 , the plane where the top of the middle barrel of the inner container 2 is located is a horizontal plane. It is beneficial to the installation process in the production process and ensures that the water heater is accurately installed in the predetermined position.

Embodiment 6

As shown in Figure 4, a sedimentation tank is arranged at the bottom of the inner tank 2, and a sewage outlet is arranged at the bottom of the tank. The settling tank can be used for the deposition of impurities and scale, and can accumulate some of the impurities and scale, which is beneficial to the discharge of sewage impurities.

Embodiment 7

As shown in FIG. 4 , the water heater water inlet pipe 3 is provided with a water inlet buffer pipe, the bottom of the water inlet buffer pipe is provided with a plurality of water inlet holes, and the water inlet buffer tank can buffer the water inlet pipe 3 . The punching pressure of the water inlet prevents damage to the heating pipe 13 , and at the same time controls the water inlet amount of the water inlet pipe 3 .

To sum up, in the present invention, the sewage outlet is arranged at the lowest point of the bottom of the inner pot 2, and the bottom of the inner pot 2 is inclined upward, which can facilitate the precipitation of impurities and scales of the water heater to the sewage outlet by its own gravity. One solution is to make the barrel in the inner tank 2 a cylindrical structure, and set the entire inner tank 2 inclined, so that the central axis of the barrel in the inner tank 2 and the plane at the bottom of the outer shell 1 are at an angle to ensure that the inner tank 2 The impurities can be deposited in the sewage outlet. Another solution of the present invention is to set the barrel in the inner pot 2 as a conical structure, and the radial section radius of the barrel in the inner pot 2 changes gradually. For better installation, the plane where the top of the middle barrel of the inner pot 2 is located is set. It is set as a horizontal plane, and a settling tank is arranged at the bottom of the inner tank 2, and the sewage outlet is arranged at the bottom of the tank to further ensure that impurities can be deposited at the sewage outlet of the inner tank 2, then only the sewage valve 6 needs to be turned on, Impurities are discharged through the sewage pipe 5, which realizes the function of convenient sewage discharge and no cleaning. In the present invention, a water passage 12 is arranged between the water inlet pipe 3 and the water outlet pipe 4, and an on-off control valve is arranged on the water passage 12 to control the water heater from the water inlet pipe 3 and the water outlet pipe when cleaning the inner tank 2. 4. At the same time, the inner tank 2 is washed with water, and the sewage is discharged from the sewage discharge pipe 5. The present invention increases the cleaning step to further ensure the effect of sewage, ensures that the inner tank 2 of the water heater is cleaned in all directions and washes the scale and impurities attached to it. And discharged from the sewage pipe 5. The water heater of the invention has the advantages of simple structure, good sewage discharge effect, strong practicability and low cost, and is suitable for production and promotion.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, various modifications and improvements can be made without departing from the principles of the present invention, which should also be regarded as the present invention. the scope of protection of the invention.

Claims (10)

1. A control method of a water heater comprises a shell, wherein a liner is arranged in the shell and consists of a left end socket, a right end socket and a liner middle barrel, a water inlet pipe, a water outlet pipe and a drain outlet are arranged at the bottom of the liner, the drain outlet is connected with the drain outlet, a drain valve for controlling connection and disconnection of the drain outlet is arranged on the drain outlet, the water outlet pipe extends to the top space of the liner from the bottom of the liner, the drain outlet is arranged at the lowest point of the bottom of the liner, and the bottom of the liner inclines upwards along the drain outlet;

the control method comprises the following steps: when the liner is cleaned, the control unit of the water heater controls the water heater to simultaneously feed water from the water inlet pipe and the water outlet pipe through controlling the control valve on the water pipeline to flush the liner.

2. The control method of a water heater according to claim 1, wherein: the bottom of the inner container is inclined upwards by less than 15 degrees along the sewage draining outlet.

3. The control method of a water heater according to claim 1, wherein: the drain sets up at inner bag head or inner bag well bucket, when the drain setting was in the inner bag head, drain and inner bag head bottom end point distance were less than 15 cm.

4. The control method of a water heater according to claim 1, wherein: the distance from the sewage outlet to the bottom of the shell is L1, the distance from the highest position of the middle barrel of the inner container to the bottom of the shell is L2, and L1 is smaller than L2.

5. The control method of a water heater according to claim 4, wherein: the L1 is not less than 3mm than L2.

6. The control method of a water heater according to claim 1, wherein: the distance between the top of the inner container and the top of the outer shell is not less than 25 mm.

7. The control method of a water heater according to claim 1, wherein: the two ends of the inner container middle barrel of the conical structure are provided with inner container sealing heads, the radius of the inner container sealing head blocked at one end of the inner container middle barrel is R1, the radius of the inner container sealing head blocked at the other end of the inner container middle barrel is R2, and R2 is smaller than R1.

8. The control method of a water heater according to claim 7, wherein: the ratio of R2 to R1 is not less than 3 mm.

9. The control method of a water heater according to claim 1, wherein: the plane of the top of the middle barrel of the inner container is a horizontal plane.

10. The control method of a water heater according to claim 1, wherein: the bottom of the inner container is provided with a settling tank, and the drain outlet is arranged at the bottom of the tank.

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