CN109488776B

CN109488776B - water heater

Info

Publication number: CN109488776B
Application number: CN201710818915.7A
Authority: CN
Inventors: 张庆堂
Original assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2017-09-12
Filing date: 2017-09-12
Publication date: 2023-10-13
Anticipated expiration: 2037-09-12
Also published as: CN109488776A

Abstract

The application discloses a water heater, comprising: an inner container with a drain outlet; the blowoff valve, the blowoff valve is installed on the inner bag and forms the water outlet passageway with the drain intercommunication, and the blowoff valve includes: a valve body; a valve cartridge, the valve cartridge comprising: the ceramic tile comprises a fixed ceramic tile and a movable ceramic tile, wherein the fixed ceramic tile is provided with a first through hole, and the movable ceramic tile is provided with a second through hole; the valve cover is provided with a propping part which is propped against the movable ceramic chip to apply a pressing force to the movable ceramic chip and the fixed ceramic chip, and is provided with a third through hole penetrating through the upper surface and the lower surface of the valve cover; the rotating shaft penetrates through the third through hole, one end of the rotating shaft is exposed out of the lower end face of the valve cover, the other end of the rotating shaft is provided with a first connecting part, and the movable ceramic chip is provided with a second connecting part matched with the first connecting part; and a drive assembly. The water heater provided by the embodiment of the application has the advantages that the structure of the blow-down valve is simple, and the blow-down process is easy to operate and realize.

Description

Water heater

Technical Field

The application relates to the technical field of household appliances, in particular to a water heater.

Background

In the use process of the water heater, sediment is easy to generate, the pollution discharge effect of the water heater in the related technology is poor, and the pollution discharge valve is inconvenient to use.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art.

Therefore, the application provides the water heater, and the blow-down valve of the water heater is convenient, simple and easy to realize.

According to an embodiment of the present application, a water heater includes: an inner container with a drain outlet; the blowoff valve, the blowoff valve install in on the inner bag and with drain intercommunication forms out the water passageway, the blowoff valve includes: a valve body; a valve cartridge, the valve cartridge comprising: the ceramic valve comprises a fixed ceramic chip and a movable ceramic chip, wherein the fixed ceramic chip is provided with a first through hole, the movable ceramic chip is provided with a second through hole, the fixed ceramic chip is non-rotatably arranged in the valve body, the movable ceramic chip is rotatably arranged in the valve body, and the fixed ceramic chip and the movable ceramic chip are contacted with each other and abutted against the valve body; the valve cover is provided with a propping part which is propped against the movable ceramic chip to apply a pressing force to the movable ceramic chip and the fixed ceramic chip, and the valve cover is provided with a third through hole penetrating through the upper surface and the lower surface of the valve cover; the rotating shaft penetrates through the third through hole, one end of the rotating shaft is exposed out of the lower end face of the valve cover, the other end of the rotating shaft is provided with a first connecting part, and the movable porcelain piece is provided with a second connecting part matched with the first connecting part; the driving assembly is connected with one end of the rotating shaft to drive the rotating shaft to rotate, so that the movable ceramic chip is driven to switch between a first position and a second position, when the movable ceramic chip is located at the first position, the first through hole of the fixed ceramic chip is completely overlapped with the second through hole of the movable ceramic chip, the water outlet passage is conducted, and when the movable ceramic chip is located at the second position, the first through hole of the fixed ceramic chip is staggered with the second through hole of the movable ceramic chip, and the water outlet passage is disconnected.

According to the water heater provided by the embodiment of the application, the rotating shaft connected with the movable ceramic chip and the driving component is arranged in the third through hole of the valve cover, and the driving component drives the rotating shaft to rotate so as to drive the movable ceramic chip to synchronously rotate, so that the matching state of the first through hole and the second through hole is changed, and the water outlet passage is further connected or disconnected.

The water heater according to the embodiment of the application can also have the following technical characteristics:

in some embodiments of the application, the drive assembly is electrically driven.

In some embodiments of the application, the drain valve is a bottom outlet.

In some embodiments of the present application, a water outlet is formed on the valve cover, and when the first through hole of the fixed ceramic tile is completely overlapped with the second through hole of the movable ceramic tile, the water outlet is communicated with the second through hole.

In some embodiments of the present application, the rotating shaft has a fourth through hole, the fourth through hole is coaxially disposed with the third through hole, the outer peripheral surface of the rotating shaft is attached to the peripheral surface of the third through hole, and when the first through hole of the fixed ceramic chip is completely overlapped with the second through hole of the movable ceramic chip, the second through hole is communicated with the fourth through hole.

In some embodiments of the present application, an end portion at the other end of the rotating shaft is formed with an upwardly open cavity structure, a bottom surface of the cavity structure is abutted against the abutting portion of the valve cover, a top surface of the cavity structure is abutted against a lower surface of the movable ceramic chip, and when the water outlet passage is conducted, the cavity of the cavity structure is respectively communicated with the second through hole and the fourth through hole.

In some embodiments of the application, the drain valve is a side water outlet, a water outlet penetrating through the peripheral wall of the valve body and communicating with the second through hole is formed on the peripheral wall of the valve body, and the rotating shaft seals the third through hole.

In some embodiments of the present application, an end portion at the other end of the rotating shaft is formed with an upwardly open cavity structure, a bottom surface of the cavity structure is abutted against the abutting portion of the valve cover, a top surface of the cavity structure is abutted against a lower surface of the movable ceramic chip, and when the water outlet passage is conducted, a cavity of the cavity structure is communicated with the water outlet and the second through hole.

In some embodiments of the application, the cavity structure comprises: the ceramic tile comprises a bottom plate, a top plate and a connecting body arranged between the bottom plate and the top plate, wherein a diversion hole is formed between the connecting bodies, and when a first through hole of a fixed ceramic tile is completely overlapped with a second through hole of a movable ceramic tile, the diversion hole is opposite to a water outlet.

In some embodiments of the present application, a gasket is disposed between the bottom surface of the cavity structure and the valve cover, and the gasket is sleeved on the rotating shaft.

In some embodiments of the present application, one of the first connection portion and the second connection portion is a protrusion, and the other is a groove, and the protrusion is embedded in the groove, so that the rotating shaft drives the movable ceramic chip to rotate synchronously.

In some embodiments of the application, the second connection is formed on a peripheral wall of the moving tile porcelain.

In some embodiments of the application, the second connection portion is formed at the bottom of the movable tile.

In some embodiments of the application, the drive assembly has a drive motor and a transmission mechanism, the drive motor driving the shaft to rotate through the transmission mechanism.

In some embodiments of the application, the transmission is a gear transmission comprising: the driving gear is connected with a motor shaft of the driving motor; and the driven gear is connected with one end of the rotating shaft and is meshed with the driving gear.

In some embodiments of the application, the drive assembly further comprises: a housing, the housing comprising: the upper shell is arranged on the valve body and is opened downwards, and the driving motor is arranged in the shell; the lower shell is connected to the upper shell and used for sealing the upper shell, a motor shaft of the driving motor penetrates through the lower shell, and the driving gear is connected to the motor shaft and located on the lower surface of the lower shell.

In some embodiments of the application, the drive assembly further comprises: and a gear cover coupled to the valve body and the bottom of the lower housing to define a receiving chamber for receiving the driving gear and the driven gear.

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

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a water heater according to an embodiment of the present application;

FIG. 2 is a perspective view of a trapway according to some embodiments of the application;

FIG. 3 is a cross-sectional view of a trapway according to some embodiments of the application;

fig. 4 is an enlarged view at a in fig. 3;

FIG. 5 is a top view of a blow down valve according to some embodiments of the application;

FIG. 6 is an exploded view of a trapway according to some embodiments of the application;

FIG. 7 is a perspective view of a valve shaft and a driven gear according to some embodiments of the application.

Reference numerals:

a water heater 100;

an inner container 10; a water inlet chamber 11; a water inlet pipe 12; a water outlet pipe 13;

a drain valve 20;

a valve body 21; a water inlet 211; a water outlet 212;

a spool 22; setting a ceramic tile 221; a first through hole 2211; a movable tile 222; a second through hole 2221; grooves 2222;

a valve cover 23; a holding portion 231; a third through hole 2311;

a rotating shaft 24; a cavity structure 241; a top plate 2411; a projection 24111; a connector 2412; a diversion aperture 24121; a bottom plate 2413;

a drive assembly 25; a driving motor 251; a drive structure 252; a drive gear 2521; a driven gear 2522; an upper housing 253; a lower housing 254; a gear cover 255;

a spacer 26.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, features defining "first", "second" may include one or more of the described features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

A water heater 100 according to an embodiment of the present application will be described with reference to fig. 1 to 7, and as shown in fig. 1, the water heater 100 includes: the sewage treatment device comprises a liner 10, a water inlet pipe 40, a water outlet pipe 50 and a sewage discharge valve 20.

As shown in fig. 1, the inner container 10 defines a water storage cavity 11, wherein the inner container 10 is provided with a water inlet pipe 12 communicated with the water storage cavity 11 and an external pipeline, the inner container 10 is provided with a water outlet pipe 13 communicated with the water storage cavity 11 and the external pipeline, and a water outlet end of the water outlet pipe 13 can be connected with a spraying device for a user to use.

That is, in normal use of the water heater 100, water is introduced through the water inlet pipe 12, heated in the water storage chamber 11, and then flows out of the water outlet pipe 13. It will be appreciated that as the hot water goes up and the cold water goes down, the outlet end of the inlet pipe 12 is generally lower than the inlet end of the outlet pipe 13, thereby ensuring that the outlet pipe 13 always discharges hot water. Therefore, the water in the water storage chamber 11 cannot be drained through the water outlet pipe 13.

It will be appreciated that, in general, after a period of use of the water heater 100, a large amount of dirt will be deposited on the bottom of the liner 10, and if the dirt cannot be cleaned in time, the quality of the water used will be affected, and the skin health of the user will be affected.

Therefore, the water heater 100 of the present application is provided with the drain valve 20 at the drain of the liner 10, and the water of the liner 10 is drained through the drain valve 20, thereby achieving the purpose of renewing and cleaning the liner 10. The water facing end surface of the blow-down valve 20 connected with the inner container 10 may be lower than or equal to the bottom surface of the inner container 10, so that the dirty substances at the bottom of the inner container 10 are thoroughly discharged along with the water flow, and the cleaning effect is improved.

In some embodiments of the present application, as shown in fig. 3 in combination with fig. 6, the drain valve 20 may include: a valve body 21, a valve core 22, a valve cover 23, a rotating shaft 24 and a driving assembly 25.

Specifically, the valve body 21 is a cylindrical structure having a water inlet 211 and a water outlet 212, and the spool 22 includes: fixed tile 221 and movable tile 222. The fixed ceramic piece 221 has a first through hole 2211, the movable ceramic piece 222 has a second through hole 2221, the fixed ceramic piece 221 is non-rotatably mounted in the valve body 21, the movable ceramic piece 222 is rotatably mounted in the valve body 21, and the fixed ceramic piece 221 and the movable ceramic piece 222 are in contact with each other and abut against each other in the valve body 21.

The valve cover 23 has a holding portion 231, the holding portion 231 is held against the movable tile 222 to apply a pressing force to the movable tile 222 and the fixed tile 221, and the valve cover 23 has a third through hole 2311 penetrating the upper and lower surfaces of the valve cover 23. The rotating shaft 24 passes through the third through hole 2311, one end (e.g., the lower end in fig. 3) of the rotating shaft 24 is exposed out of the lower end surface of the valve cover 23, the other end (e.g., the upper end in fig. 3) of the rotating shaft 24 has a first connecting portion, and the movable ceramic chip 222 is provided with a second connecting portion 2222 matching with the first connecting portion.

In other words, the valve cover 23 applies an upward pressing force to the movable ceramic tile 222 and the fixed ceramic tile 221, so as to limit the degree of freedom of the movable ceramic tile 222 and the fixed ceramic tile 221 in the axial direction, so that the opposite surfaces of the movable ceramic tile 222 and the fixed ceramic tile 221 can be tightly attached, and the tightness between the movable ceramic tile 222 and the fixed ceramic tile 221 is improved.

The driving assembly 25 is connected to one end of the rotating shaft 24 to drive the rotating shaft 24 to rotate, so as to drive the movable ceramic tile 222 to switch between the first position and the second position, when the first through hole 2211 of the fixed ceramic tile 221 is completely overlapped with the second through hole 2221 of the movable ceramic tile 222, the water outlet passage is conducted, and when the movable ceramic tile 222 is located at the second position, the first through hole 2211 of the fixed ceramic tile 221 is staggered with the second through hole 2221 of the movable ceramic tile 222, and the water outlet passage is disconnected.

Namely, the rotating shaft 24 penetrates through the upper end surface and the lower end surface of the valve cover 23, the part exposed out of the lower end surface of the valve cover 23 is connected with the driving assembly 25, the driving assembly 25 drives the rotating shaft 24 to rotate, and the first connecting part and the second connecting part are matched, so that the moving ceramic chip 222 can be driven to synchronously rotate in the rotating process of the rotating shaft 24, the matching state of the first through hole 2211 and the second through hole 2221 is changed, and the on-off control of a water outlet passage is realized.

Wherein, when the movable ceramic chip 222 is located at the first position, the water outlet channel is completely conducted, and at this time, the water outlet amount of the drain valve 20 is maximum; when the movable ceramic piece 222 is located at the second position, the water outlet passage is disconnected, and at this time, the drain valve 20 cannot discharge water; when the movable ceramic tile 222 is located between the first position and the second position, the first through hole 2211 and the second through hole 2221 are partially overlapped and partially staggered, and the water outlet passage is partially opened, at this time, the water outlet amount of the drain valve 20 is smaller than the maximum water outlet amount.

Therefore, according to the water heater 100 of the embodiment of the application, the rotating shaft 24 connected with the movable ceramic chip 222 and the driving component 25 is arranged in the third through hole 2311 of the valve cover 23, and the driving component 25 drives the rotating shaft 24 to rotate so as to drive the movable ceramic chip 222 to synchronously rotate, so that the matching state of the first through hole 2211 and the second through hole 2221 is changed, and the water outlet passage is further connected or disconnected.

In an alternative embodiment, the driving assembly 25 is driven by electricity, that is, the rotation shaft 24 is driven by electricity, so that the blow-down valve 20 is simpler to open and close, and the user can use the blow-down valve more easily.

In some embodiments of the present application, the drain valve 20 is a bottom outlet. That is, the water flowing out of the drain enters the valve body 21 through the water inlet 211 of the drain valve 20, then sequentially passes through the first through hole 2211 and the second through hole 2221, and finally flows out of the bottom of the valve body 21.

In some alternative embodiments, the valve cover 23 is formed with the water outlet 212, and when the first through hole 2211 of the fixed ceramic tile 221 is completely overlapped with the second through hole 2221 of the movable ceramic tile 222, the water outlet 212 is communicated with the second through hole 2221.

One of the first connecting portion and the second connecting portion is a protrusion 24111, the other is a groove, and the protrusion 24111 is embedded into the groove, so that the rotating shaft 24 drives the movable ceramic tile 222 to rotate synchronously.

In a further alternative embodiment, the second connection portion 2222 is formed at the bottom of the movable tile 222. The rotating shaft 24 is disposed at the center of the valve cover 23, and the central axis of the rotating shaft 24 coincides with the rotation centers of the movable ceramic chip 222 and the fixed ceramic chip 221. The end of the other end of the rotating shaft 24 is provided with a concave groove, the bottom center of the movable ceramic chip 222 extends downwards to form a protrusion 24111, and the protrusion 24111 extends into the groove, so that connection between the rotating shaft 24 and the movable ceramic chip 222 is realized, and in this way, the rotating shaft 24 can drive the movable ceramic chip 222 to rotate in the rotating process, so that the matching state of the first through hole 2211 and the second through hole 2221 is changed.

In other alternative embodiments, the rotating shaft 24 has a fourth through hole (not shown) coaxially disposed with the third through hole 2311, and the outer peripheral surface of the fourth through hole is attached to the inner peripheral surface of the third through hole 2311, so that the second through hole 2221 is communicated with the fourth through hole when the first through hole 2211 of the fixed ceramic tile 221 is completely overlapped with the second through hole 2221 of the movable ceramic tile 222. In other words, when the water outlet passage is turned on, the water flows downward through the first through hole 2211, the second through hole 2221, and the fourth through hole in this order.

In a further alternative embodiment, a cavity structure 241 is formed at the end of the other end of the rotating shaft 24, the bottom surface of the cavity structure 241 is abutted to the abutting portion 231 of the valve cover 23, the top surface of the cavity structure 241 is attached to the lower surface of the movable ceramic tile 222, and when the water outlet passage is conducted, the cavity of the cavity structure 241 is respectively communicated with the second through hole 2221 and the fourth through hole. That is, the abutting portion of the valve cover 23 abuts against the bottom surface of the cavity structure 241, and applies a pressing force to the movable tile 222 through the top surface of the cavity structure 241, so that the movable tile 222 and the fixed tile 221 are abutted against each other.

In the case that the first through hole 2211 of the fixed ceramic tile 221 is staggered with the second through hole 2221 of the movable ceramic tile 222, the cavity is not communicated with the second through hole 2221; when the first through hole 2211 of the fixed tile 221 and the second through hole 2221 of the movable tile 222 are completely overlapped, the chamber is communicated with the second through hole 2221, and the water flows into the chamber and then flows downwards in the fourth through hole direction to be discharged.

In still other embodiments of the present application, as shown in fig. 2 and 3, the drain valve 20 is a side-outlet type, the water outlet 212 penetrates the peripheral wall of the valve body 21 and communicates with the second through hole 2221, and the rotating shaft 24 closes the third through hole 2311. One of the first connecting portion and the second connecting portion is a protrusion 24111, the other is a groove 2222, and the protrusion 24111 is embedded into the groove 2222, so that the rotating shaft 24 drives the movable ceramic tile 222 to rotate synchronously. That is, the valve cover 23 and the rotary shaft 24 close the bottom of the valve body 21, and the water flow is discharged from the side wall of the valve body 21 when the water outlet passage is opened.

In some alternative embodiments, as shown in fig. 4, 6 and 7, a cavity structure 241 is formed at the end of the other end of the rotating shaft 24, the bottom surface of the cavity structure 241 is abutted against the abutting portion 231 of the valve cover 23, the top surface of the cavity structure 241 is attached to the lower surface of the movable ceramic tile 222, and when the water outlet passage is conducted, the cavity of the cavity structure 241 is communicated with the water outlet 212 and the second through hole 2221. That is, the abutting portion of the valve cover 23 abuts against the bottom surface of the cavity structure 241, and applies a pressing force to the movable tile 222 through the top surface of the cavity structure 241, so that the movable tile 222 and the fixed tile 221 are abutted against each other.

In a further alternative embodiment, cavity structure 241 includes: the bottom plate 2413, the top plate 2411 and the connecting body 2412 arranged between the bottom plate 2413 and the top plate 2411, the connecting body 2412 is formed with a diversion hole 24121, and when the first through hole 2211 of the fixed ceramic tile 221 is completely coincident with the second through hole 2221 of the movable ceramic tile 222, the diversion hole 24121 is opposite to the water outlet 212.

In a further alternative embodiment, the second connection portion 2222 is formed in the peripheral wall of the movable tile 222. Specifically, the top plate 2411 is an annular plate body, the upper surface of the top plate 2411 extends upward to form a protrusion 24111, and the peripheral wall of the movable tile 222 is formed with a groove 2222 in which the protrusion 24111 mates. When the protrusions 24111 are fitted into the grooves 2222, the lower surface of the movable tile 222 abuts against the upper surface of the top plate 2411, and the abutting portion of the cover 23 abuts against the lower surface of the bottom plate 2413, thereby pressing the movable tile 222 against the fixed tile 221.

In one embodiment, as shown in fig. 3 and fig. 4 and fig. 6, the bottom surface of the cavity structure 241 and the valve cover 23 are provided with a gasket 26, and the gasket 26 is sleeved on the rotating shaft 24. That is, the abutting portion of the valve cover 23 is not directly in contact with the lower surface of the bottom plate 2413, and thus, during the rotation of the rotation shaft 24, the friction between the valve cover 23 and the bottom plate 2413 can be reduced, thereby reducing the torque required to drive the rotation shaft 24 to rotate, and thus, the drain valve 20 can be opened or closed more easily.

Wherein the projection of the gasket 26 in the horizontal direction covers the projection of the third through hole 2311 in the horizontal direction. Thus, water is prevented from flowing out of the fit gap between the rotation shaft 24 and the third through hole 2311, and sealability of the drain valve 20 is improved.

In still other embodiments of the present application, the drive assembly 25 has a drive motor 251 and a transmission 252, the drive motor 251 driving the rotation of the shaft 24 via the transmission 252.

In some alternative embodiments, gear train 252 is a gear train, and gear train 252 includes: a driving gear 2521 and a driven gear 2522, the driving gear 2521 being connected with a motor shaft of the driving motor 251; the driven gear 2522 is coupled to one end of the rotation shaft 24 and intermeshes with the driving gear 2521. The other end of the rotating shaft 24 may have a square cross section, and the driven gear 2522 may be provided with a square hole, so that the stability of the connection between the rotating shaft 24 and the driven gear 2522 may be improved.

It will be appreciated that the above embodiments are illustrative only and not limiting to the scope of the application, and that the drive mechanism 252 may be a belt drive mechanism.

In a further alternative embodiment, as shown in fig. 6, the driving assembly 25 may further include: a housing. The housing may include: an upper housing 253 and a lower housing 254. The upper housing 253 is mounted on the valve body 21 and opened downward, and the driving motor 251 is mounted in the housing. The lower housing 254 is connected to the upper housing 253 for closing the upper housing 253, a motor shaft of the driving motor 251 penetrates through the lower housing 254, and the driving gear 2521 is connected to the motor shaft and is positioned at the lower surface of the lower housing 254.

In a further alternative embodiment, as shown in fig. 6, the driving assembly 25 further includes: a gear cover 255, the gear cover 255 being coupled to the valve body 21 and the bottom of the lower housing 254 to define a receiving cavity for receiving the driving gear 2521 and the driven gear 2522. Thereby preventing the exposure of the driving gear 2511 and the driven gear 2512 and improving the safety of the use of the drain valve 20.

Other constructions and operations of the water heater 100 according to embodiments of the present application are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A water heater, comprising:

an inner container with a drain outlet; the inner container defines a water storage cavity, and is provided with a water inlet pipe communicated with the water storage cavity and an external pipeline;

a drain valve which is arranged on the inner container and communicated with the drain outlet to form a water outlet passage,

the blowdown valve includes:

a valve body;

a valve cartridge, the valve cartridge comprising: the ceramic valve comprises a fixed ceramic chip and a movable ceramic chip, wherein the fixed ceramic chip is provided with a first through hole, the movable ceramic chip is provided with a second through hole, the fixed ceramic chip is non-rotatably arranged in the valve body, the movable ceramic chip is rotatably arranged in the valve body, and the fixed ceramic chip and the movable ceramic chip are contacted with each other and abutted against the valve body;

the valve cover is provided with a propping part which is propped against the movable ceramic chip to apply a pressing force to the movable ceramic chip and the fixed ceramic chip, and the valve cover is provided with a third through hole penetrating through the upper surface and the lower surface of the valve cover;

the rotating shaft penetrates through the third through hole, one end of the rotating shaft is exposed out of the lower end face of the valve cover, the other end of the rotating shaft is provided with a first connecting part, and the movable porcelain piece is provided with a second connecting part matched with the first connecting part;

the driving assembly is connected with one end of the rotating shaft to drive the rotating shaft to rotate, so that the movable ceramic chip is driven to switch between a first position and a second position, when the movable ceramic chip is positioned at the first position, the first through hole of the fixed ceramic chip is completely overlapped with the second through hole of the movable ceramic chip, the water outlet passage is conducted, and when the movable ceramic chip is positioned at the second position, the first through hole of the fixed ceramic chip is staggered with the second through hole of the movable ceramic chip, and the water outlet passage is disconnected; the drain valve is of a lower water outlet type; the rotary shaft is provided with a fourth through hole, the fourth through hole is coaxially arranged with the third through hole, the peripheral surface of the rotary shaft is attached to the peripheral surface of the third through hole, when the first through hole of the fixed ceramic chip is completely attached to the second through hole of the movable ceramic chip, the second through hole is communicated with the fourth through hole, the end part of the other end of the rotary shaft is provided with an upward open cavity structure, the bottom surface of the cavity structure is mutually abutted to the abutting part of the valve cover, the top surface of the cavity structure is attached to the lower surface of the movable ceramic chip, and when the water outlet passage is conducted, the cavity of the cavity structure is respectively communicated with the second through hole and the fourth through hole.

2. The water heater of claim 1, wherein the drive assembly is electrically driven.

3. The water heater according to claim 1, wherein a water outlet is formed in the valve cover, and the water outlet is communicated with the second through hole when the first through hole of the fixed ceramic sheet is completely overlapped with the second through hole of the movable ceramic sheet.

4. A water heater, comprising:

an inner container with a drain outlet;

the blowdown valve includes:

a valve body;

the driving assembly is connected with one end of the rotating shaft to drive the rotating shaft to rotate, so that the movable ceramic chip is driven to switch between a first position and a second position, when the movable ceramic chip is positioned at the first position, the first through hole of the fixed ceramic chip is completely overlapped with the second through hole of the movable ceramic chip, the water outlet passage is conducted, and when the movable ceramic chip is positioned at the second position, the first through hole of the fixed ceramic chip is staggered with the second through hole of the movable ceramic chip, and the water outlet passage is disconnected; the inner container defines a water storage cavity, and is provided with a water inlet pipe communicated with the water storage cavity and an external pipeline;

the drain valve is a side water outlet type, a water outlet penetrating through the peripheral wall of the valve body and communicated with the second through hole is formed in the peripheral wall of the valve body, and the rotating shaft seals the third through hole; the end part of the other end of the rotating shaft is provided with an upward open cavity structure, the bottom surface of the cavity structure is mutually abutted with the abutting part of the valve cover, the top surface of the cavity structure is attached to the lower surface of the movable ceramic chip, and when the water outlet passage is communicated, the cavity of the cavity structure is communicated with the water outlet and the second through hole; the cavity structure comprises: the ceramic tile comprises a bottom plate, a top plate and a connecting body arranged between the bottom plate and the top plate, wherein a diversion hole is formed between the connecting bodies, and when a first through hole of a fixed ceramic tile is completely overlapped with a second through hole of a movable ceramic tile, the diversion hole is opposite to a water outlet.

5. The water heater of claim 4, wherein the bottom surface of the cavity structure and the valve cover are provided with gaskets, and the gaskets are sleeved on the rotating shaft.

6. The water heater as claimed in any one of claims 1-5, wherein one of the first and second connection portions is a protrusion and the other is a recess, the protrusion being embedded in the recess so that the shaft drives the moving ceramic tile to rotate synchronously.

7. The water heater according to claim 6, wherein the second connection portion is formed at a peripheral wall of the movable tile.

8. The water heater of claim 6, wherein the second connection portion is formed at a bottom of the movable tile.

9. The water heater as claimed in any one of claims 1-5 or 7-8, wherein the driving assembly has a driving motor and a transmission mechanism, the driving motor driving the rotation shaft to rotate through the transmission mechanism.

10. The water heater of claim 9, wherein the transmission is a gear transmission,

the gear transmission structure comprises:

the driving gear is connected with a motor shaft of the driving motor;

and the driven gear is connected with one end of the rotating shaft and is meshed with the driving gear.

11. The water heater of claim 10, wherein the drive assembly further comprises: the shell body is provided with a plurality of grooves,

the housing includes:

the upper shell is arranged on the valve body and is opened downwards, and the driving motor is arranged in the shell;

the lower shell is connected to the upper shell and used for sealing the upper shell, a motor shaft of the driving motor penetrates through the lower shell, and the driving gear is connected to the motor shaft and located on the lower surface of the lower shell.

12. The water heater of claim 11, wherein the drive assembly further comprises: and a gear cover coupled to the valve body and the bottom of the lower housing to define a receiving chamber for receiving the driving gear and the driven gear.