CN215412501U - Electric water heater - Google Patents

Abstract

The utility model discloses an electric water heater, comprising: the device comprises a shell, an electric heating device, a water inlet flow metering assembly and a connecting hose; the electric heating device is arranged in the inner cavity of the shell and is provided with a first water inlet nozzle and a first water outlet nozzle; the water inlet flow metering component is arranged on one side of the electric heating device and is provided with a second water inlet nozzle and a second water outlet nozzle, and the outer side wall of the second water outlet nozzle is provided with external threads; one end of the connecting hose is connected with the first water inlet nozzle, the other end of the connecting hose is provided with a switching sleeve, the switching sleeve is rotatably arranged on the connecting hose, the second water outlet nozzle is inserted into the switching sleeve, the switching sleeve is provided with an internal thread, and the internal thread is in threaded connection with the external thread. The electric water heater provided by the utility model can simplify the connecting and assembling process of the electric heating device and the water inlet flow component, and improve the connecting stability of the electric heating device and the water inlet flow component.

Description

Electric water heater

Technical Field

The utility model relates to the technical field of household appliances, in particular to an electric water heater.

Background

Some current electric water heaters heat the water in the pipeline through electric heating device, and one side of electric heating device is connected with into water flow measurement subassembly, and mainly used record flows into electric heating device's discharge, and electric heating device's water inlet nozzle and the faucet of the flow subassembly of intaking pass through the jump ring assembly fixedly, and this kind of assembly mode has following defect: on one hand, the clamp spring is easy to loosen, so that the connection between the electric heating device and the water inlet flow assembly is not stable enough; on the other hand, when the clamp spring is disassembled and assembled, the clamp spring is small and easy to lose, and the assembly is inconvenient.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an electric water heater, which can simplify the connecting and assembling process of an electric heating device and a water inlet flow component and improve the connecting stability of the electric heating device and the water inlet flow component.

The electric water heater according to the embodiment of the utility model comprises: the device comprises a shell, an electric heating device, a water inlet flow metering assembly and a connecting hose; the electric heating device is arranged in the inner cavity of the shell and is provided with a first water inlet nozzle and a first water outlet nozzle; the water inlet flow metering component is arranged on one side of the electric heating device and provided with a second water inlet nozzle and a second water outlet nozzle, and the outer side wall of the second water outlet nozzle is provided with external threads; one end of the connecting hose is connected with the first water inlet nozzle, the other end of the connecting hose is provided with a switching sleeve, the switching sleeve is rotatably arranged on the connecting hose, the second water outlet nozzle is inserted in the switching sleeve, the switching sleeve is provided with an internal thread, and the internal thread is in threaded connection with the external thread.

The electric water heater according to the embodiment of the utility model at least has the following beneficial effects: the electric heating device and the water inlet flow measuring assembly are connected through the connecting hose, after the electric heating device and the water inlet flow measuring assembly are fixed in the shell, the connecting pipeline of the electric heating device and the water inlet flow measuring assembly can be assembled, the adapter sleeve can be easily sleeved on the second water outlet nozzle through the deformable characteristic of the connecting hose, then the adapter sleeve is rotated to enable the external thread and the internal thread to be matched with each other, in the process of screwing and matching, the second water outlet nozzle and the adapter sleeve move relatively, the second water outlet nozzle extends into the adapter sleeve, and due to the tight occlusion of the external thread and the internal thread, the pipeline connection of the electric heating device and the water inlet flow measuring assembly is more stable and is not easy to loosen; in addition, other fastening fittings are not needed to be additionally used, so that the assembly process is simplified, the fastening fittings are not needed to be lost, and the connection assembly of the electric heating device and the water inlet flow metering assembly is facilitated.

According to some embodiments of the utility model, a sealing sleeve is arranged between the adapter sleeve and the connecting hose, one end of the sealing sleeve is fixedly connected with the end part of the connecting hose, a sealing groove is arranged at the other end of the sealing sleeve, the adapter sleeve is rotatably connected with the other end of the sealing sleeve, a sealing ring is arranged in the sealing groove, the sealing ring is abutted against the end wall of the sealing groove, the inner cavity of the sealing ring is communicated with the inner cavity of the connecting hose, a sealing flange is arranged at the end part of the second water outlet nozzle, and the sealing flange is in sealing fit with the sealing ring.

According to some embodiments of the utility model, a sidewall of the sealing flange abuts a sidewall of the sealing groove.

According to some embodiments of the utility model, an annular groove is formed at an end edge of the sealing groove, the adapter sleeve is provided with a rotating ring, the rotating ring is inserted into the annular groove, a limiting groove is formed in a side wall of the annular groove, a limiting convex rib is arranged on a side wall of the rotating ring, the limiting convex rib is located in the limiting groove, a limiting cover is further arranged at an end portion of the sealing sleeve, the limiting cover is provided with an avoiding hole through which the rotating ring penetrates, and the limiting cover can limit the limiting convex rib to prevent the limiting rib from being separated from the limiting groove.

According to some embodiments of the present invention, the water inlet flow metering assembly includes a booster pump and a flow meter, both the booster pump and the flow meter are connected to the housing in a snap-fit manner, the booster pump is connected to the flow meter, the second water outlet nozzle is disposed on the booster pump, and the second water inlet nozzle is disposed on the flow meter.

According to some embodiments of the utility model, at least two first support columns are arranged on the inner side wall of the shell, first buckles are arranged at the end parts of the first support columns, first clamping holes corresponding to the first support columns are arranged on the booster pump, and the first buckles are clamped and matched with the first clamping holes.

According to some embodiments of the utility model, at least two second support columns are arranged on the inner side wall of the casing, second buckles are arranged at the end parts of the second support columns, second clamping holes corresponding to the second support columns are arranged on the flowmeter, and the second buckles are clamped and matched with the second clamping holes.

According to some embodiments of the utility model, the water inlet flow metering assembly comprises a flow meter and a direction-changing elbow, the direction-changing elbow is connected with the flow meter, the second water inlet nozzle is arranged on the flow meter, and the second water outlet nozzle is arranged on the direction-changing elbow.

According to some embodiments of the utility model, the power supply further comprises a main control board, the main control board is arranged in the inner cavity of the shell, and the main control board is connected with the shell in a clamping manner.

According to some embodiments of the utility model, the portable electronic device further comprises a control panel, the control panel is connected with the shell in a clamping manner, a display screen and a control button are arranged on the control panel, an avoidance port communicated with an inner cavity of the shell is arranged on the shell, the display screen and the control button are located at the avoidance port, and the control panel is respectively and electrically connected with the main control panel, the display screen and the control button.

According to some embodiments of the utility model, the electric heating device further comprises a temperature controller, the temperature controller is arranged on the side wall of the electric heating device, and the temperature controller is electrically connected with the main control board.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of an electric water heater according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the end of the connection hose of the electric water heater shown in FIG. 1;

FIG. 3 is an enlarged schematic view of area A shown in FIG. 2;

fig. 4 is a schematic diagram of an electric water heater according to another embodiment of the present invention.

Reference numerals:

a housing 100, a first buckle 110, a second buckle 120, a third buckle 130, a fourth buckle 140,

An electric heating device 200, a first water inlet nozzle 210, a first water outlet nozzle 220,

A booster pump 310, a first clamping hole 311, a flowmeter 320, a second clamping hole 321, a direction-changing bent pipe 330, a second water inlet nozzle 301, a second water outlet nozzle 302, external threads 303, a sealing flange 304,

A connecting hose 400, an adapter sleeve 410, an internal thread 411, a rotating ring 412, a limit convex rib 413, a sealing sleeve 420, an annular groove 421, a limit groove 422, a sealing ring (430)430, a limit cover 440,

The main control panel 500, the third engaging hole 510, the control panel 600, the display screen 610, the control button 620, the fourth engaging hole 630, and the temperature controller 700.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1 and 2, an electric water heater according to an embodiment of the present invention includes: a housing 100, an electric heating device 200, a water inlet flow metering assembly and a connecting hose 400; the electric heating device 200 is arranged in the inner cavity of the shell 100, and the electric heating device 200 is provided with a first water inlet nozzle 210 and a first water outlet nozzle 220; the water inlet flow metering component is arranged on one side of the electric heating device 200, the water inlet flow metering component is provided with a second water inlet nozzle 301 and a second water outlet nozzle 302, and the outer side wall of the second water outlet nozzle 302 is provided with an external thread 303; one end of the connecting hose 400 is connected with the first water inlet nozzle 210, the other end of the connecting hose 400 is provided with an adapter sleeve 410, the adapter sleeve 410 is rotatably arranged on the connecting hose 400, the second water outlet nozzle 302 is inserted into the adapter sleeve 410, the adapter sleeve 410 is provided with an internal thread 411, and the internal thread 411 is in threaded connection with the external thread 303.

Specifically, the connecting hose 400 can be a common metal hose and has good flexible bending deformation characteristics, one end of the connecting hose 400 is connected with the electric heating device 200, so that the connecting hose is easy to heat due to a heat transfer effect and heat up, and the connecting hose 400 is made of a metal material and can bear larger water pressure and higher water temperature, so that the performance of the electric water heater is not influenced while the adapter sleeve 410 is convenient to move; the electric heating device 200 can use a common stainless steel cup type heating body or a red copper heating body and the like, a water body flows into the water inflow metering assembly from the second water inlet nozzle, enters the connecting hose from the second water outlet nozzle, flows into an inner cavity of the electric heating device through the connecting hose and the first water inlet nozzle, the electric heating device can be electrified to heat the water body flowing into the inner cavity, and finally flows out of the water body with higher temperature from the first water outlet nozzle.

In the above embodiment, the electric heating device 200 and the water inlet flow measuring assembly are connected through the connection hose 400, and after the electric heating device 200 and the water inlet flow measuring assembly are fixed in the housing 100, the connection pipeline between the two can be assembled, the adapter sleeve 410 can be easily sleeved on the second water outlet nozzle 302 through the deformable characteristic of the connection hose 400, and then the adapter sleeve 410 is rotated to enable the external thread 303 and the internal thread 411 to be matched with each other, in the process of screwing and matching, the second water outlet nozzle 302 and the adapter sleeve 410 move relatively, so that the second water outlet nozzle 302 extends deeply into the adapter sleeve 410, and as the external thread 303 and the internal thread 411 are tightly engaged, the pipeline connection between the electric heating device 200 and the water inlet flow measuring assembly is more stable and is not easy to loosen; in addition, other fastening fittings are not needed in the dismounting process of the electric heating device 200 and the water inflow metering assembly, so that the assembling and dismounting processes are simplified, the fastening fittings are not needed to be lost, and the connection assembly and the daily maintenance of the electric heating device 200 and the water inflow metering assembly are facilitated.

In some embodiments of the present invention, as shown in fig. 2, a sealing sleeve 420 is disposed between the adapter sleeve 410 and the connection hose 400, one end of the sealing sleeve 420 is fixedly connected to the end of the connection hose 400, the other end of the sealing sleeve 420 is provided with a sealing groove, the adapter sleeve 410 is rotatably connected to the other end of the sealing sleeve 420, a sealing ring 430 is disposed in the sealing groove, the sealing ring 430 abuts against an end wall of the sealing groove, an inner cavity of the sealing ring 430 is communicated with an inner cavity of the connection hose 400, a sealing flange 304 is disposed at an end of the second water outlet nozzle 302, and the sealing flange 304 is in sealing fit with the sealing ring 430. In the actual assembly process, along with the rotation of the adapter sleeve 410, the second water outlet nozzle 302 extends into the sealing groove, and the sealing flange 304 is tightly attached to the sealing ring 430, so that the connection sealing performance of the electric heating device 200 and the water inlet flow metering assembly is improved.

Further, the lateral wall of sealing flange 304 and the lateral wall laminating of seal groove, more common screw thread revolves the cover and establishes on coupling hose 400 for the screw thread revolves usually, and preset certain clearance between screw thread revolves the cover and coupling hose 400, make the screw thread revolve the cover and can remove relative coupling hose 400, and can rotate, coupling hose 400's tip is equipped with the flange, the flange can restrict the screw thread revolve the cover and break away from coupling hose 400, also can play sealed effect simultaneously, this kind of setting is owing to have the clearance between screw thread revolves the cover and coupling hose 400, consequently, the relative volume of rocking of switching cover 410 and coupling hose 400 is great, lead to coupling hose 400 and second faucet 302's butt joint to be accurate inadequately easily, thereby influence the leakproofness. In the embodiment of the utility model, the sealing sleeve 420 is arranged, the adapter sleeve 410 is rotatably connected with the sealing sleeve 420, and the side wall of the sealing flange 304 is attached to the side wall of the sealing groove, so that the second water outlet nozzle 302 can keep radial stability when extending into the sealing groove, the sealing flange 304 is more accurately and tightly matched with the sealing ring 430, and the connection sealing performance is further improved.

In some embodiments of the present invention, as shown in fig. 2 and 3, an annular groove 421 is formed at an end edge of the sealing groove, the adapter sleeve 410 is provided with a rotating ring 412, the rotating ring 412 is inserted into the annular groove 421, a limiting groove 422 is formed in a sidewall of the annular groove 421, a limiting convex rib 413 is formed on a sidewall of the rotating ring 412, the limiting convex rib 413 is located in the limiting groove 422, a limiting cover 440 is further provided at an end portion of the sealing sleeve 420, the limiting cover 440 is provided with an avoiding hole through which the rotating ring 412 penetrates, and the limiting cover 440 can limit the limiting convex rib 413 to prevent the limiting rib from being separated from the limiting groove 422. The conventional screw thread socket is limited by the flange, and is difficult to detach and detach from the connection hose 400, which is not convenient for maintenance. When the adapter sleeve 410 and the sealing sleeve 420 are assembled, the rotating ring 412 penetrates through the avoiding hole of the limiting cover 440, then the rotating ring 412 of the adapter sleeve 410 is inserted into the accommodating groove, the limiting convex rib 413 is located in the limiting groove 422, and finally the limiting cover 440 is covered and fixed on the sealing sleeve 420, so that the limiting convex rib 413 is limited in the limiting groove 422, and the adapter sleeve 410 is rotatably connected with the sealing sleeve 420. Because the limiting convex rib 413 is limited by the limiting cover 440, the adapter sleeve 410 can be conveniently disassembled and assembled while the adapter sleeve 410 is rotatably connected with the sealing sleeve 420, so that the adapter sleeve 410 is conveniently maintained. Wherein, the inner chamber wall of spacing lid 440 is equipped with internal thread 411, and the lateral wall of sealing sleeve 420 is equipped with external screw thread 303, through spacing lid 440 and sealing sleeve 420 screw-thread fit, fixes spacing lid 440 on sealing sleeve 420, and of course, spacing lid 440 also can be fixed on sealing sleeve 420 through the mode of beating the bolt.

It is easy to think that in other embodiments, the adapter sleeve 410 can also be configured as a common threaded sleeve, and as described above, the adapter sleeve is sleeved on the end of the connection hose 400 to realize the rotatable connection with the connection hose 400, so that the configuration can simplify the structures of the adapter sleeve 410 and the connection hose 400 and reduce the cost.

It should be noted that, in the embodiment of the present invention, the water inflow metering assembly includes a plurality of optional assembly schemes, different water inflow metering assemblies can be replaced according to different requirements during the production and assembly of the water heater, and the different water inflow metering assemblies are connected to the electric heating device 200 in the same manner, so that the water heater has a modular assembly and disassembly effect, and can be conveniently selected and assembled.

In some embodiments, as shown in fig. 1, the water inlet flow metering assembly includes a booster pump 310 and a flow meter 320, the booster pump 310 and the flow meter 320 are connected to the housing 100 in a snap-fit manner, so as to facilitate assembly of the booster pump 310 and the flow meter 320, the booster pump 310 is connected to the flow meter 320, the second water outlet nozzle 302 is disposed on the booster pump 310, and the second water inlet nozzle 301 is disposed on the flow meter 320, wherein the booster pump 310 can boost the water flow in the pipe, and by actively increasing the water pressure in the electric water heater, the problem that heating cannot be started in a low water pressure environment is solved, the flow meter 320 can monitor and record the water inlet flow and the water inlet flow rate of the electric water heater, so as to facilitate subsequent adjustment and control of the electric heating apparatus 200 according to the obtained data, specifically, the flow meter 320 may be a common hall flow meter 320, and the hall flow meter 320 is a flow meter 320 combined with hall elements, the impeller is driven by fluid to rotate to drive the screw rod to rotate, so that the magnetic system moves up and down, the displacement is large when the flow rate is high, the displacement is detected by the Hall element to obtain the flow rate and the flow, and the device has the characteristics of high accuracy, high reliability, simple structure and the like.

In the above embodiment, the booster pump 310 and the flow meter 320 are fixed on the casing 100 in a clamping manner, and compared with the conventional bolt assembly, the assembling process of the booster pump 310 and the flow meter 320 is simplified by reducing assembling fastening fittings such as bolts, thereby facilitating the assembling process of the water inlet flow meter assembly.

Further, in the above embodiment, at least two first support columns are disposed on the inner side wall of the casing 100, the end portion of each first support column is provided with a first buckle 110, the booster pump 310 is provided with a first clamping hole 311 corresponding to the first support column, and the first buckle 110 is in clamping fit with the first clamping hole 311. The first clamping column is matched with the first clamping hole 311, so that the booster pump 310 is connected with the shell 100 in a clamping manner. Specifically, the side wall of the booster pump 310 is provided with a connecting rib piece, and the first clamping hole 311 is formed in the connecting rib piece, so that the first clamping hole 311 can be conveniently machined. Of course, in some embodiments, the positions of the first buckle 110 and the first buckle hole 311 can be interchanged, and the effect is the same.

Similarly, in some embodiments, the inner side wall of the casing 100 is provided with at least two second supporting columns, the end portions of the second supporting columns are provided with second fasteners 120, the flowmeter 320 is provided with second fastening holes 321 corresponding to the second supporting columns, and the second fasteners 120 are fastened and matched with the second fastening holes 321. The flowmeter 320 is connected to the casing 100 by the engagement of the second locking pin with the second locking hole 321. Specifically, the side wall of the booster pump 310 is provided with a connecting rib piece, and the second clamping hole 321 is formed in the connecting rib piece, so that the second clamping hole 321 can be conveniently machined. Of course, in some embodiments, the positions of the second latch 120 and the second latch hole 321 can be interchanged, and the effect is the same.

In some embodiments of the present invention, as shown in fig. 4, the inflow water flow measuring assembly may also include a flow meter 320 and a direction-changing elbow 330, the direction-changing elbow 330 is connected to the flow meter 320, the second inflow nozzle 301 is disposed on the flow meter 320, and the second outflow nozzle 302 is disposed on the direction-changing elbow 330. The water inflow metering assembly of the embodiment omits a booster pump 310, reduces production cost, can be used in a region where water pressure is stable and normal for a long time, and can be assembled with different water inflow metering assemblies according to different requirements in practical application.

In some embodiments of the present invention, the main control board 500 is further included, the main control board 500 is disposed in the inner cavity of the casing 100, the main control board 500 is connected to the casing 100 in a clamping manner, and the main control board 500 is configured to receive signals of the relevant sensors and control and adjust various execution elements in the electric water heater, for example, in some embodiments described above, the hall element of the hall flowmeter 320 may transmit relevant flow data to the main control board 500, and the main control board 500 performs temperature adjustment on the electric heating apparatus 200. Wherein, also can set up the third joint hole 510 on main control board 500, the inside wall of casing 100 sets up in the third buckle 130 that the third joint hole 510 cooperatees, realizes the joint cooperation of main control board 500 and casing 100.

In some embodiments of the present invention, the electric water heater further includes a control panel 600, the control panel 600 is connected to the housing 100 in a clamping manner, the control panel 600 is provided with a display screen 610 and a control button 620, the housing 100 is provided with an avoidance port communicated with an inner cavity of the housing 100, the display screen 610 and the control button 620 are located at the avoidance port, the control panel 600 is electrically connected to the main control panel 500, the display screen 610 and the control button 620, the display screen 610 displays relevant parameters, a user can touch the control button 620 to transmit an electric signal to the main control panel 500, and the main control panel 500 controls relevant executing elements to achieve an effect of adjusting parameters of the electric water heater. Wherein, control panel 600 also can be fixed on casing 100 through the mode of joint, for example set up fourth joint hole 630 on control panel 600, the inside wall of casing 100 sets up in fourth buckle 140 of fourth joint hole 630 complex, realizes the joint cooperation of control panel 600 and casing 100.

In some embodiments of the present invention, the temperature controller 700 is further included, the temperature controller 700 is disposed on a side wall of the electric heating apparatus 200, the temperature controller 700 is electrically connected to the main control board 500, the temperature controller 700 senses the temperature of the electric heating apparatus 200 to obtain the overall temperature of the water body in the electric heating apparatus 200, and transmits the temperature information to the main control board 500, the main control board 500 processes the information and feeds the information back to the temperature controller 700, and the temperature controller 700 cuts off or connects to a circuit of the electric heating apparatus 200 to achieve the temperature control effect of heating up or stopping heating up.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiment has been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the present invention.

Claims (10)

1. An electric water heater, comprising:

a housing (100);

the electric heating device (200) is arranged in the inner cavity of the shell (100), and the electric heating device (200) is provided with a first water inlet nozzle (210) and a first water outlet nozzle (220);

the water inlet flow metering component is arranged on one side of the electric heating device (200), the water inlet flow metering component is provided with a second water inlet nozzle (301) and a second water outlet nozzle (302), and the outer side wall of the second water outlet nozzle (302) is provided with an external thread (303);

connecting hose (400), the one end of connecting hose (400) with first water inlet nozzle (210) are connected, the other end of connecting hose (400) is equipped with switching cover (410), switching cover (410) rotationally locate on connecting hose (400), second water outlet nozzle (302) are inserted and are located in switching cover (410), switching cover (410) are equipped with internal thread (411), internal thread (411) with external screw thread (303) spiro union cooperation.

2. The electric water heater of claim 1,

adapter sleeve (410) with be equipped with sealing sleeve (420) between coupling hose (400), the one end of sealing sleeve (420) with the tip fixed connection of coupling hose (400), the other end of sealing sleeve (420) is equipped with the seal groove, just adapter sleeve (410) with the other end of sealing sleeve (420) rotates to be connected, be equipped with sealing ring (430) in the seal groove, sealing ring (430) with the end wall butt of seal groove, the inner chamber of sealing ring (430) with the inner chamber intercommunication of coupling hose (400), the tip of second faucet (302) is equipped with sealing flange (304), sealing flange (304) with sealing ring (430) sealed laminating.

3. The electric water heater of claim 2,

the side wall of the sealing flange (304) is attached to the side wall of the sealing groove.

4. The electric water heater of claim 2,

the end of seal groove is along being equipped with ring channel (421), switching cover (410) are equipped with swivel becket (412), swivel becket (412) are inserted and are located in ring channel (421), the lateral wall of ring channel (421) is equipped with spacing groove (422), the lateral wall of swivel becket (412) is equipped with spacing protruding muscle (413), spacing protruding muscle (413) are located in spacing groove (422), the tip of sealing sleeve (420) still is equipped with spacing lid (440), spacing lid (440) are equipped with the confession the hole of dodging that swivel becket (412) were worn to establish, spacing lid (440) can be right spacing in order to prevent that spacing muscle breaks away from spacing groove (422).

5. The electric water heater of claim 1,

the inflow water flow metering assembly comprises a booster pump (310) and a flowmeter (320), the booster pump (310) and the flowmeter (320) are connected with the casing (100) in a clamping mode, the booster pump (310) is connected with the flowmeter (320), the second water outlet nozzle (302) is arranged on the booster pump (310), and the second water inlet nozzle (301) is arranged on the flowmeter (320).

6. The electric water heater of claim 5,

the inside wall of casing (100) is equipped with two at least first buckles (110), be equipped with on booster pump (310) with first joint hole (311) that first buckle (110) correspond, first buckle (110) with first joint hole (311) joint cooperation.

7. The electric water heater of claim 5,

the inside wall of casing (100) is equipped with two at least second buckles (120), be equipped with on flowmeter (320) with second joint hole (321) that second buckle (120) correspond, second buckle (120) with second joint hole (321) joint cooperation.

8. The electric water heater of claim 1,

still include main control board (500), main control board (500) are located the inner chamber of casing (100), main control board (500) with casing (100) joint links to each other.

9. The electric water heater of claim 8,

still include control panel (600), control panel (600) with casing (100) joint links to each other, be equipped with display screen (610) and control button (620) on control panel (600), be equipped with on casing (100) with the mouth of dodging of the inner chamber intercommunication of casing (100), display screen (610) with control button (620) are located dodge the mouth department, control panel (600) respectively with main control board (500), display screen (610) and control button (620) electricity is connected.

10. The electric water heater of claim 8,

the electric heating device is characterized by further comprising a temperature controller (700), wherein the temperature controller (700) is arranged on the side wall of the electric heating device (200), and the temperature controller (700) is electrically connected with the main control board (500).

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