CN110906555A

CN110906555A - Water mixing device for water heater and water heater

Info

Publication number: CN110906555A
Application number: CN201811087699.4A
Authority: CN
Inventors: 巴喜亮; 梁国荣; 黄官贤
Original assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2018-09-18
Filing date: 2018-09-18
Publication date: 2020-03-24
Anticipated expiration: 2038-09-18
Also published as: CN110906555B

Abstract

The invention discloses a water mixing device for a water heater and the water heater. A mixing device for a water heater comprises: the water storage container is provided with a water inlet interface, a water outlet interface, a water storage inlet and a water supply outlet; the water absorption device is arranged outside the water storage container and is provided with a jet flow inlet, a jet flow outlet, a Venturi flow channel and a water absorption port; the reversing valve is arranged in the water storage container and is provided with a water inlet, a first water outlet and a second water outlet, the water inlet is connected with the water inlet interface, and the second water outlet is communicated with the jet inlet through the water outlet interface; and the water level detection device is arranged in the water storage container and disconnects the first water outlet and the water storage inlet when the water level of water in the water storage container reaches a preset high water level. The water mixing device for the water heater has the function of 'zero cold water', and has the advantages of simple structure, low cost, few installation procedures, safety, reliability, energy conservation, low use requirement and strong applicability.

Description

Water mixing device for water heater and water heater

Technical Field

The invention relates to the technical field of water heaters, in particular to a water mixing device for a water heater and the water heater with the water mixing device for the water heater.

Background

In the related art, a water heater having a "zero cold water" function generally uses a water pump to circulate water in a hot water pipe for preheating, so that a user can directly use hot water. In the water heater with the return pipe, a return pipe and a hot water pipe are used to form a loop, and the water heater without the return pipe is provided with a device which is similar to an H valve and is provided with a one-way valve to form the loop.

However, the two methods both need a water pump, a pipe fitting matched with the water pump is needed in the water heater, and components related to the water pump are also needed in the controller part, so that the matching cost is high; meanwhile, parts similar to an H valve are needed to construct a loop, and the installation process is multiple.

In addition, 70% of users do not install a water return pipeline, the users can use a cold water pipe and an 'H valve' to construct a loop, hot water can flow through the cold water pipe in the circulation process, and when a cold water faucet is turned on after preheating, the hot water can flow out, so that the users can be scalded; meanwhile, when a user receives other water treatment products (such as a water purifier), if the temperature of water in the cold water pipe exceeds 38 ℃, damage to the RO membrane of the water purifier may be directly caused.

In addition, in the circulating preheating process, an unnecessary water path is heated, waste gas is generated, and energy is not saved; and, because circulation flow is less, have the requirement to the minimum temperature rise of water heater, otherwise, can appear the condition that can't use because of the overtemperature when summer intake water temperature is higher. In addition, part of users have small circulating flow due to aging of pipelines and large pipeline resistance, and cannot use the 'zero cold water' function.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the water mixing device for the water heater, which has the function of 'zero cold water', and has the advantages of simple structure, low cost, few installation procedures, safety, reliability, energy conservation, low use requirement and strong applicability.

The invention also provides a water heater with the water mixing device for the water heater.

According to a first aspect of the invention, a water mixing device for a water heater comprises: the water storage container is provided with a water inlet interface, a water outlet interface, a water storage inlet and a water supply outlet, and the water inlet interface is suitable for being communicated with a water outlet of a water mixing valve or a water valve of the water heater; the water absorption device is arranged outside the water storage container and is provided with a jet flow inlet, a jet flow outlet and a Venturi flow channel which is respectively communicated with the jet flow inlet and the jet flow outlet, and a water absorption port is arranged at the joint of the jet flow inlet and the Venturi flow channel; the reversing valve is arranged in the water storage container and is provided with a water inlet, a first water outlet and a second water outlet, the water inlet is connected with the water inlet interface, the first water outlet is selectively communicated with the water storage inlet, the second water outlet is communicated with the jet flow inlet through the water outlet interface, and the reversing valve is constructed to control water entering from the water inlet to flow out from the first water outlet firstly and flow out from the second water outlet when the first water outlet is disconnected from the water storage inlet; the water level detection device is arranged in the water storage container and disconnects the first water outlet and the water storage inlet when the water level of water in the water storage container reaches a preset high water level; a shut-off device installed in the water storage container and having a communication port communicating with an inner space of the water storage container and a water supply interface communicating with the water suction port through the water supply outlet, the shut-off device being configured to close the communication port when a level of water in the water storage container is lower than a preset low level.

According to the water mixing device for the water heater, the zero cold water function can be realized without establishing a circulating loop, so that a water pump and components matched with the water pump are not needed, and the cost is optimal; the user with or without the water return pipe does not need to use an H valve to construct a loop, and the water return device is simple in structure and few in installation procedures; because no waterway circulates, the situations that the cold water pipe is mixed with hot water and other water treatment equipment is damaged do not exist, and the safety and the reliability are high; the condition that the pipelines except the hot water pipeline are heated is avoided, and the gas and the energy are saved; the water outlet flow is the normal water flow because no water path circulates, and no special requirement is made on the minimum temperature rise of the water heater; as long as water pressure and flow are in normal range, the water mixing device can be used in the occasions with ageing pipelines, and the applicability is strong.

In addition, the water mixing device for the water heater according to the embodiment of the invention also has the following additional technical characteristics:

according to some embodiments of the invention, the water level detection device is switchable between a water-in state and an off state and comprises: a water box having an open mouth and a drain opening, the open mouth being located above the drain opening; a float floatably provided in the water tank and exposed from the opening; a water level control member provided at the drain opening and configured to control water to enter the water cartridge from the open opening and to exit the water cartridge from the drain opening; the water inlet control assembly is arranged on the water box and is provided with an inlet, a control port and an outlet positioned between the inlet and the control port, the inlet is respectively communicated with the control port and the first water outlet, and the outlet forms the water storage inlet; the rocker arm is rotatably arranged on the top wall of the floater and is connected with the water inlet control assembly, and in the water inlet state, the rocker arm opens the control port and the water inlet control assembly is communicated with the inlet and the outlet; when the water inlet control assembly is in the stop state, the rocker arm closes the control port, and the water inlet control assembly disconnects the inlet and the outlet.

In some embodiments of the invention, the water inlet control assembly comprises: the water inlet seat is arranged in a containing cavity formed on the side wall of the water box, and the inlet and the outlet are arranged on the water inlet seat; the upper cover is detachably arranged on the water inlet seat and defines a water inlet cavity together with the water inlet seat, and the control port is arranged on the upper cover; the elastic control piece is clamped between the upper cover and the water inlet seat and is positioned in the water inlet cavity, and the elastic control piece is communicated with the inlet and the outlet in the water inlet state and blocks the inlet in the cut-off state through self elastic deformation.

Optionally, the upper cover is provided with a guide post, and a part of the elastic control member, which corresponds to the inlet, is sleeved on the guide post and defines a water passing gap between the guide post and the inlet, which communicates with the control port.

Advantageously, the outlets are arranged at intervals along the circumferential direction of the inlet, a support rib is defined between two adjacent outlets, and the elastic control member abuts against the support rib in the cut-off state.

In some embodiments of the present invention, the water level detecting apparatus further comprises: the water level adjusting piece is rotatably arranged in the water storage container, the water box is abutted to the inner wall of the water storage container, and the water level adjusting piece is in threaded fit with the water box so as to convert the self rotary motion into the lifting motion of the water box.

According to some embodiments of the present invention, the venturi flow channel includes a converging flow channel, a mixing flow channel and a diverging flow channel connected in sequence in a direction from the jet flow inlet to the jet flow outlet, a flow area of the converging flow channel decreases in the direction from the jet flow inlet to the jet flow outlet and a flow area of the diverging flow channel increases in the direction from the jet flow inlet to the jet flow outlet, and the water suction port is disposed at a connection of the jet flow inlet and the converging flow channel.

According to some embodiments of the invention, the water absorbing device comprises: the jet flow inlet, the jet flow outlet and the Venturi flow channel are respectively arranged on the pipe body; a nozzle mounted to the tube body and in communication with the jet inlet, the nozzle having a jet flow channel with a reduced flow area in a direction from the jet inlet to the jet outlet.

According to some embodiments of the invention, the reversing valve is switchable between an initial state and a reversing state and comprises: the valve body is provided with the water inlet, the first water outlet, the second water outlet, a first action cavity and a second action cavity; the first valve core is movably arranged in the first action cavity between a first position and a second position; the second valve core is movably arranged in the second action cavity between an initial position and a reversing position and is linked with the first valve core, wherein in the initial state, the first valve core is located at the first position, the second valve core is located at the initial position, and the second valve core is only communicated with the water inlet and the first water outlet so as to feed water into the water storage container; when the first water outlet is disconnected from the water storage inlet, the first valve core moves to the second position and drives the second valve core to move to the reversing position, the second valve core only communicates the water inlet and the second water outlet, and the reversing valve is switched to the reversing state.

Further, the direction valve further comprises: the connecting rod is rotatably arranged on the valve body and is connected with the second valve core, and the first valve core is abutted against the connecting rod in the initial state; when the first water outlet is disconnected with the water storage inlet, the first valve core pushes the connecting rod to rotate, and the connecting rod drives the second valve core to move to the reversing position.

Advantageously, in the reverse state, the first spool is separable from the connecting rod to move to the first position.

In some embodiments of the invention, the first spool moves from the first position to the second position under the hydrostatic pressure of the water.

Optionally, a first elastic element is arranged on the first valve core, and the first elastic element has a force for normally driving the first valve core to the first position; and a second elastic part is arranged on the second valve core and has a force for normally driving the second valve core to the initial position.

According to some embodiments of the invention, the blocking device is provided with a water charging interface, the blocking device is configured to be switchable between a water charging state and a water supplying state, the blocking device blocks the communication port and communicates the water supplying interface and the water charging interface when in the water charging state, and the blocking device blocks the water charging interface and opens the communication port to communicate the water supplying interface and the communication port when in the water supplying state, wherein the water charging interface is communicated with the second water outlet, or the water charging interface is communicated with a cold water inlet of a water mixing valve or a water valve of the water heater.

In some embodiments of the invention, the cut-off device comprises: the base is provided with the communication port, the water supply interface and the water replenishing interface; the floating assembly is arranged on the base in a floating mode between the water supplementing position and the water supplying position, the floating assembly falls to the water supplementing position under the action of self gravity, the stopping device is switched to the water supplementing state, and the floating assembly floats to the water supplying position under the action of buoyancy of water, and the stopping device is switched to the water supplying state.

Optionally, the float assembly comprises: the floating ball is arranged at the communication port in a vertically floating manner to open and close the communication port; the piston is movably arranged in the base and connected with the floating ball, the floating assembly is arranged at the water supplementing position, the piston is communicated with the water supplementing interface and the water supply interface, and the floating assembly is arranged at the water supply position, and the piston covers the water supplementing interface.

According to some embodiments of the present invention, the water inlet port and the water outlet port are provided on a bottom wall of the water storage container, a portion of the bottom wall of the water storage container protrudes downward to form a drain groove, the water supply outlet is provided on an inner wall of the drain groove and the shut-off device is installed in the drain groove.

According to some embodiments of the present invention, the jet inlet is communicated with the second water outlet through a water outlet pipe, the water suction port is communicated with the water supply port through a water suction pipe, the water suction pipe includes a positioning section, a water running section and a connecting section, which are sequentially connected, a gear is disposed at a top of the water storage container, the positioning section is hung on the gear, the water running section is disposed in the water outlet pipe, the connecting section is located outside the water outlet pipe to be connected with the water suction port, or the jet inlet is connected with the second water outlet through a flange, and the water suction port is communicated with the water supply port through the water suction pipe.

The water heater according to the second aspect of the invention comprises the water mixing device for the water heater according to the first aspect of the invention.

According to the water heater provided by the embodiment of the invention, the water mixing device for the water heater has the function of 'zero cold water', and is simple in structure, low in cost, few in installation procedures, safe, reliable, energy-saving, low in use requirement and strong in applicability.

Additional aspects and advantages of the invention 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 invention.

Drawings

Fig. 1 is a schematic structural view of a water mixing device for a water heater according to an embodiment of the present invention;

fig. 2 is an operational schematic diagram of a mixing device for a water heater according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a water absorbing device according to an embodiment of the present invention;

FIG. 4 is a schematic view of a water absorbing device according to an embodiment of the present invention;

FIG. 5 is a perspective view of a tube body of a water absorbing device according to an embodiment of the present invention;

FIG. 6 is a perspective view of a tube body of a water absorbing device according to an alternative embodiment of the present invention;

FIG. 7 is a perspective view of a reversing valve according to an embodiment of the invention;

FIG. 8 is an exploded view of a diverter valve according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of a reversing valve according to an embodiment of the invention in an initial state;

FIG. 10 is a cross-sectional view of the reversing valve during a transition from the initial condition to the reversing condition in accordance with an embodiment of the present invention;

FIG. 11 is a cross-sectional view of a reversing valve according to an embodiment of the invention in a reversing state;

FIG. 12 is an exploded view of a shut off device according to an embodiment of the present invention;

fig. 13 is a sectional view of a shut-off means according to an embodiment of the present invention in a water replenishing state;

fig. 14 is a sectional view of a shut-off means according to an embodiment of the present invention in a water replenishing state;

fig. 15 is a sectional view of a stopping means according to an embodiment of the present invention in a water supplying state;

fig. 16 is a sectional view of a stopping means according to an embodiment of the present invention in a water supplying state;

FIG. 17 is an assembled view of a water storage container and a water level detecting means according to an embodiment of the present invention;

FIG. 18 is an assembled view of a water storage container and a water level detecting means according to an embodiment of the present invention;

fig. 19 is a perspective view of a water level detecting apparatus according to an embodiment of the present invention;

fig. 20 is a perspective view of a water level detecting apparatus according to an embodiment of the present invention;

fig. 21 is an exploded view of a water level detecting apparatus according to an embodiment of the present invention;

fig. 22 is a sectional view of a water level detecting apparatus according to an embodiment of the present invention in a water inlet state;

fig. 23 is a sectional view of a water level detecting apparatus according to an embodiment of the present invention in a water inlet state;

fig. 24 is a sectional view of a water level detecting apparatus according to an embodiment of the present invention in a water inlet state;

fig. 25 is a sectional view of a water level detecting apparatus according to an embodiment of the present invention in a water inlet state;

fig. 26 is a sectional view of a water level detecting apparatus according to an embodiment of the present invention in a cut-off state;

fig. 27 is an exploded view of a mixing device for a water heater according to an embodiment of the present invention;

fig. 28 is a schematic structural view of a mixing device for a water heater according to an embodiment of the present invention;

fig. 29 is a schematic structural view of a mixing device for a water heater according to an embodiment of the present invention;

fig. 30 is a schematic structural view of a mixing device for a water heater according to an embodiment of the present invention;

fig. 31 is a schematic view of a mixing device for a water heater according to an alternative embodiment of the present invention.

Reference numerals:

a water mixing device 10, a sealing element 11, a sealing gasket 12, a water level detecting pipe 13, a handle 14, a water outlet pipe 15, a positioning section 16, a connecting section 17, a water suction pipe 18, a stop pipe 19,

Water storage container 100, fixing ring buckle 101, water storage cavity 110, water inlet 111, water outlet 112, water supply outlet 113, water discharge groove 114, gear 115, water storage cover 120, wire casing 121,

A water absorbing device 200, a jet inlet 201, a jet outlet 202, a venturi channel 203, a water suction port 204, a tube body 210, a contraction channel 211, a mixing channel 212, an expansion channel 213, a nozzle 220, an injection channel 221, a water jet flow path,

The water supply device comprises a reversing valve 300, a water inlet 301, a first water outlet 302, a second water outlet 303, a mounting shaft 304, a mounting shaft 305, a cap nut 306, an action port 307, a valve body 310, a fixing support 311, a mounting hole 312, a first valve core 320, a second valve core 330, a mounting hole 331, a water inlet joint 340, a water outlet joint 350, a connecting rod 360, a positioning hole 361, a through hole 362, an adapting hole 363, a containing cavity 364, a first elastic piece 371, a second elastic piece 372,

A stopping device 400, a communication port 401, a water supply interface 402, a water supplementing interface 403, a stopping sealing ring 404, a base 410, a floating ball 420, a piston 430, a water through hole 431, a water through channel 432, a shielding part 433, a top cover 440, a water through hole 441, a water outlet pipe,

The water level detection device 500, an inlet 501, an outlet 502, a control port 503, a water passing gap 504, a water box 510, an opening 511, a water outlet 512, a threaded hole 513, a containing cavity 514, a floater 520, a water level control member 530, a hook 531, a water level adjusting member 540, an adjusting operation groove 541, an elastic control member 550, a water inlet seat 560, a buckling position 561, a support rib 562, an upper cover 570, a protrusion 571, a guide column 572, a mounting bracket 573, a rocker arm 580, a misoperation adjusting structure 581, a water outlet cover, a water inlet cover and a water outlet cover,

A mixing or water valve 20, a shower head 30.

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.

A mixing device 10 for a water heater according to an embodiment of the first aspect of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 26, a mixing device 10 for a water heater according to an embodiment of the present invention includes: water storage container 100, water suction device 200, switching valve 300, stop device 400 and water level detection device 500.

Specifically, the water storage container 100 may be a stainless steel member or a plastic (e.g., PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene), PP (Polypropylene), PET (polyethylene terephthalate)) member, the water storage container 100 includes a water storage cavity 110 and a water storage lid 120, and the water storage lid 120 is covered on the water storage cavity 110. The water storage cavity 110 has a water inlet 111, a water outlet 112, a water storage inlet and a water supply outlet 113, and the water inlet 111 is adapted to be connected to the water outlet of the mixing valve or water valve 20 of the water heater. Advantageously, the volume of the water storage container 100 does not exceed 15L.

The water absorbing device 200 is arranged outside the water storage container 100, the water absorbing device 200 is provided with a jet flow inlet 201, a jet flow outlet 202 and a venturi flow channel 203 which is respectively communicated with the jet flow inlet 201 and the jet flow outlet 202, the jet flow outlet 202 is suitable for being connected with a shower head 30 of a water heater, and a water suction port 204 is arranged at the joint of the jet flow inlet 201 and the venturi flow channel 203. It is understood that the venturi channel 203 refers to a channel designed according to the venturi principle, that is, when water entering from the jet inlet 201 flows through the venturi channel 203, negative pressure is generated, and the negative pressure is transmitted to the water suction port 204, so that the water suction port 204 generates a water suction effect.

The reversing valve 300 is arranged in the water storage container 100, the reversing valve 300 is provided with a water inlet 301, a first water outlet 302 and a second water outlet 303, the water inlet 301 is connected with the water inlet interface 111, the first water outlet 302 is selectively communicated with the water storage inlet, the second water outlet 303 is communicated with the jet flow inlet 201 through the water outlet interface 112, and the reversing valve 300 is constructed to control water entering from the water inlet 301 to flow out from the first water outlet 302 firstly and flow out from the second water outlet 303 when the first water outlet 302 is disconnected with the water storage inlet.

The water level detection device 500 is disposed in the water storage container 100, and the water level detection device 500 disconnects the first water outlet 302 from the water storage inlet when the water level of the water in the water storage container 100 reaches a preset high water level (which can be set according to the amount of cold water required by different users), so as to realize selective connection and disconnection of the first water outlet 302 and the water storage container 100.

Since the suction port 204 of the water suction device 200 generates a large noise when air flows, the cut-off device 400 is used to detect whether or not no water is supplied to the suction port 204 in the water storage container 100, as shown in fig. 1, 2, and 12 to 16.

Specifically, the shut-off device 400 is installed at the bottom of the water storage container 100, and the shut-off device 400 has a communication port 401 and a water supply interface 402, the communication port 401 communicating with the inner space of the water storage container 100, the water supply interface 402 communicating with the water suction port 204 through the water supply outlet 113, the shut-off device 400 being configured to close the communication port 401 when the water level of the water in the water storage container 100 is lower than a preset low water level.

The operation of the mixing device 10 for a water heater according to the embodiment of the present invention will be described with reference to the accompanying drawings.

After the water mixing valve or the water valve 20 is opened, water flows into the water inlet 301 of the reversing valve 300 through a pipeline, flows out of the first water outlet 302, enters the inlet 501 of the water level detection device 500 through the water level detection pipe 13, and then flows into the water storage container 100 through the outlet 502 of the water level detection device 500;

when the water level of the water in the water storage container 100 reaches a preset high water level, the water storage inlet is disconnected from the first water outlet 302, at the moment, the direction of the water path is changed by the reversing valve 300, and the water from the water inlet 301 flows out of the second water outlet 303 and enters the incident flow inlet 201;

when water flows through the water suction device 200, negative pressure is generated through the inner Venturi flow passage 203, water is sucked from the water supply outlet 113 of the water storage container 100 through the water suction port 204, the sucked water and hot water flowing out of the water heater are mixed in the water suction device 200 and then flow into the shower head 30, namely the shower head 30 discharges water, and meanwhile, shower is prompted;

as the water level of the water in the water storage container 100 gradually decreases, when the water level reaches a preset low water level, the cut-off device 400 cuts off the water path between the communication port 401 and the water supply port 402, so that the shower head 30 does not generate large noise due to the suction of a large amount of air, and the bathing experience is ensured;

after bathing is finished, the water mixing valve or the water valve 20 is closed, and the reversing valve 300 is changed into a water outlet state of the first water outlet 302 to wait for next use.

According to the water mixing device 10 for the water heater of the embodiment of the invention, cold water (generally, water with a temperature lower than 30 ℃ is cold water) is collected by using the water storage container 100, when hot water (for example, water with a temperature higher than 35 ℃) reaches a water consumption point, water is automatically switched to be discharged from the shower head 30, and the collected cold water is sucked back to the front end of the shower head 30 through the water sucking device 200 to be used, so that a 'zero cold water' function can be realized without establishing a circulation loop, that is, no cold water flows out of the shower head 30 when a user opens the water mixing valve or the water valve 20 and uses water, and no cold water is separately discharged, so that the purposes of saving water and protecting environment are achieved.

Therefore, the water mixing device 10 for the water heater according to the embodiment of the invention has the advantages of compact structure, good integrity, no need of a water pump and components matched with the water pump, and optimal cost; the user with or without the water return pipe does not need to use an H valve to construct a loop, and the water return device is simple in structure and few in installation procedures; because no waterway circulates, the situations that the cold water pipe is mixed with hot water and other water treatment equipment is damaged do not exist, and the safety and the reliability are high; the condition that the pipelines except the hot water pipeline are heated is avoided, and the gas and the energy are saved; the water outlet flow is the normal water flow because no water path circulates, and no special requirement is made on the minimum temperature rise of the water heater; as long as the water pressure and the flow are within the normal range, the water mixing device 10 can be used in the occasions with aged pipelines, and various types of water heaters can be used as the water mixing device 10 is applied to the water using end of the water heater, so that the applicability is very strong.

According to some embodiments of the present invention, as shown in fig. 27 to 31, a water inlet port 111 and a water outlet port 112 are provided on a bottom wall of the water holding chamber 110, a portion of the bottom wall of the water holding chamber 110 protrudes downward to form a water discharge groove 114, a water supply outlet 113 is provided on an inner wall of the water discharge groove 114, and a shut-off device 400 is installed in the water discharge groove 114. Therefore, the water flow is smoother, and the water drainage effect is good.

According to some embodiments of the present invention, as shown in fig. 1, 2, and 17-26, the water level detection apparatus 500 is switchable between a water inlet state and an off state and includes: a water tank 510, a float 520, a water level control member 530, and a water inlet control assembly.

Specifically, the water level detection device 500 is installed in the water storage container 100. The water box 510 has an open opening 511 and a drain port 512, the open opening 511 being located above the drain port 512, for example, a top wall of the water box 510 is opened to form the open opening 511. The float 520 is floatably provided in the water tank 510. The water level control member 530 is provided at the drain port 512, and the water level control member 530 is configured to control water to enter the water cartridge 510 from the open port 511 and to drain the water cartridge 510 from the drain port 512. The water inlet control assembly is mounted to the water box 510. And the inlet control assembly has an inlet 501, a control port 503, and an outlet 502 between the inlet 501 and the control port 503, the inlet 501 communicating with the control port 503.

As shown in fig. 22-25, in the water inlet state, the float 520 opens the control port 503 and the water inlet control assembly communicates with the inlet 501 and the outlet 502, water enters the water inlet control assembly from the inlet 501 and then flows out of the outlet 502 and the control port 503 into the water storage container 100, and the water storage container 100 starts to store water; when the water level of the water in the water storage container 100 rises to a preset high level, the water level detection device 500 is switched to a cut-off state as shown in fig. 26, the float 520 floats under the buoyancy to close the control port 503, and the water inlet control assembly disconnects the inlet 501 and the outlet 502, thereby stopping the water inlet into the water storage container 100.

It should be noted that, when the water level in the water storage container 100 reaches the vicinity of the water discharge port 512, as shown in fig. 25, the water level control member 530 closes the water discharge port 512, and water does not enter the water box 510 from the water discharge port 512, but enters the water box 510 through the open port 511, so that the water level can reach a preset high water level; when the water storage container 100 is drained to the outside, the water level control member 530 opens the drain port 512 to facilitate the drainage of the water in the water box 510.

From this, water level detection device 500 can reliably end the water route when the water level reachs and predetermine the high water level, like this, after the user opened the muddy water valve or the water valve 20 of water heater, the cold water that flows out earlier is collected to water storage container 100, when the cold water volume of collecting reaches the settlement water yield (predetermine the high water level promptly), can stop to water storage container 100 and intake and supply hot water gondola water faucet 30 to do benefit to the "zero cold water" function that realizes the water heater, and, simple structure, with low costs.

According to some embodiments of the present invention, as shown in fig. 17 and 18, the water level detecting apparatus 500 further includes: a water level adjusting member 540, the water level adjusting member 540 is installed in the water storage container 100, the water box 510 abuts against the inner wall of the water storage container 100, the water level adjusting member 540 is in threaded fit with the water box 510 to convert the rotation motion of itself into the lifting motion of the water box 510, and the top end of the water level adjusting member 540 is provided with an adjusting operation groove 541. Like this, need not to pull down water box 510 alright with conveniently adjusting the height of water box 510 to, need not to set up the structure of fixing a position water box 510, thereby can conveniently adjust the height of predetermineeing high water level, the structure is very simple, and the quantity of spare part is very few.

For example, the water box 510 is provided with a threaded hole 513, the water level adjusting member 540 is a screw rod, the screw rod is matched with the threaded hole 513, and the adjusting operation groove 541 is configured as a cross groove, so that the height of the water box 510 can be quickly adjusted by rotating a tool such as a screw driver, so as to achieve the purpose of adapting to different water storage capacities, for example, the water storage capacity is 2L-15L. Advantageously, the inner wall of the water storage container 100 is provided with a fixing buckle 101 for positioning a screw, which is hung in the water storage container 100 by the fixing buckle 101.

According to some embodiments of the present invention, as shown in fig. 19-26, the water inlet control assembly includes: a water inlet body and an elastic control member 550. The water inlet body is internally provided with a water inlet cavity which is provided with an inlet 501, a control opening 503 and an outlet 502. The elastic control member 550 is arranged in the water inlet cavity, a water passing gap 504 for communicating the inlet 501 and the control port 503 is defined between the elastic control member 550 and the water inlet body, the elastic control member 550 communicates the inlet 501 and the outlet 502 in the water inlet state, and the inlet 501 is blocked by the elastic deformation of the elastic control member 550 in the cut-off state.

Specifically, in the water inlet state, the elastic control member 550 is in an undeformed original state, and water entering from the inlet 501 flows into the water storage container 100 through the outlet 502 and simultaneously flows into the water storage container 100 through the water gap 504 from the control port 503; in the cut-off state, since the control port 503 is closed, the pressure in the water inlet chamber is increased, the elastic control member 550 is deformed downward under the action of the water pressure and finally abuts against the water inlet body, and at this time, the inlet 501 is blocked by the elastic control member 550, thereby playing a role of cutting off the water path. Therefore, an external circuit is not needed, and the structure is very simple.

Further, as shown in fig. 19 to 26, the water inlet body includes: a water inlet seat 560 and an upper cover 570. The inlet seat 560 is provided in the receiving chamber 514 formed on the sidewall of the water bucket 510, and the inlet 501 and the outlet 502 are provided on the inlet seat 560. The upper cover 570 is detachably mounted on the water inlet seat 560, for example, the upper cover 570 is provided with a plurality of protrusions 571 arranged at intervals along the circumferential direction thereof, the water inlet seat 560 is provided with a plurality of fastening positions 561 arranged at intervals along the circumferential direction thereof, the plurality of protrusions 571 correspond to the plurality of fastening positions 561 in a one-to-one manner, and each protrusion 571 is fitted in the corresponding fastening position 561. Wherein a plurality of catch 561 are disposed around the inlet 501.

The upper cover 570 and the water inlet seat 560 together define a water inlet chamber, the elastic control member 550 is clamped between the upper cover 570 and the water inlet seat 560, the control opening 503 is provided on the upper cover 570, and the control opening 503 is positioned above the elastic control member 550. For example, the elastic control member 550 is a rubber pad, the upper cover 570 is provided with a slot, the rubber pad is assembled in the slot, and the rubber pad is located above the inlet 501.

Advantageously, as shown in fig. 22-26, the upper cover 570 is provided with a guide column 572, a portion of the elastic control member 550 corresponding to the position of the inlet 501 is sleeved on the guide column 572, and a water gap 504 is defined between the portion of the elastic control member 550 and the guide column 572. In this manner, the elastic control member 550 can be reliably pressed against the inlet 501 under the guidance of the guide posts 572.

In some embodiments of the present invention, as shown in fig. 22 and 23, the outlet 502 is multiple, the multiple outlets 502 are arranged at intervals along the circumferential direction of the inlet 501, a support rib 562 is defined between two adjacent outlets 502, and the elastic control member 550 abuts against the support rib 562 in the cut-off state, so that the water flow is smooth in the water inlet process, and the sealing performance in the water path cut-off process can be ensured.

According to some embodiments of the present invention, as shown in fig. 24-26, the float 520 is exposed from the opening 511, and a swing arm 580 is provided between the float 520 and the upper cover 570, the swing arm 580 being rotatably installed on the top wall of the float 520 and connected to the upper cover 570 to open and close the control port 503. For example, the upper cover 570 is provided with a mounting bracket 573, and one end of the swing arm 580 connected to the upper cover 570 is mounted on the mounting bracket 573.

Advantageously, as shown in fig. 21 and 24-26, the rocker arm 580 is provided with a gasket 12, and in the off state, the gasket 12 blocks the control port 503, so that the sealing performance is good and the damping is also achieved. It will be appreciated that to further simplify the construction, the portion of the rocker arm 580 associated with the float 520 is on the same side of the portion of the rocker arm 580 associated with the upper cap 570 as the portion of the rocker arm 580 used to close off the control port 503.

Alternatively, as shown in fig. 19, the end of the swing arm 580 connected to the float 520 is provided with a mis-operation adjusting structure 581, and after the user turns off the water by mistake during the water use process, the mis-operation adjusting structure 581 lifts the swing arm 580 to close the control port 503, thereby preventing water from entering the water storage container 100 when not necessary and ensuring that the user continues to use the water. For example, the misoperation adjusting structure 581 can be a notch, the water storage cover 120 is provided with a wire casing 121, the notch is connected to the outside of the water storage container 100, and the outside of the water storage container 100 is provided with a handle 14 connected with the wire casing, so that the water way can be cut off by manually pulling the wire casing.

According to some embodiments of the present invention, as shown in fig. 21 to 26, the drain port 512 is located at the bottom wall of the water bucket 510, the water level control member 530 is provided to be movable up and down on the water bucket 510, and the water level control member 530 is constructed as a hollow member having an open bottom. When the water level of the water in the water storage container 100 is lower than the lower edge of the water level control member 530, the water level control member 530 moves downward by its own weight and opens the water discharge port 512; when water in the water storage container 100 overflows the water level control member 530, air inside the water level control member 530 floats up and pushes the water level control member 530 against the bottom of the water bucket 510, so that the water level control member 530 closes the water discharge port 512, so that water does not enter the water bucket 510 from the water discharge port 512. For example, the top wall of the water level control member 530 is provided with a plurality of hooks 531 spaced along the circumference thereof, and when the water level of the water in the water storage container 100 is lower than the lower edge of the water level control member 530, the water level control member 530 is hooked on the water box 510 by its own weight.

In some embodiments of the present invention, the water cartridge 510, the float 520, the water level control member 530, the swing arm 580, the upper cover 570, the water inlet seat 560, the fixing ring 101, and the water level adjusting member 540 are all plastic members, so that the cost is reduced. Wherein the float 520 may be constructed as a hollow member, thereby being easily floated and having a simple structure.

The operation of the water level detecting apparatus 500 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 24, when there is no water in the water tank 510, the float 520 drops down on the bottom of the water tank 510 under the action of gravity, and the float 520 pulls the rocker arm 580, so that the end of the rocker arm 580 connected with the upper cover 570 is lifted, and the control opening 503 on the top of the upper cover 570 is opened; meanwhile, the water level control member 530 at the lower portion of the water tub 510 is also hooked on the water tub 510 by gravity, and a gap is left between the outer circumferential wall of the water level control member 530 and the inner circumferential wall of the drain port 512.

As shown in fig. 22-25, the water level detecting device 500 is in a water inlet state, when water flows in from the inlet 501, water flows out through the outlet 502 and then flows into the water container 100; at the same time, the water flows from the water gap 504 into the space between the upper cover 570 and the elastic control member 550, and finally flows out through the control opening 503 at the top of the upper cover 570.

As the amount of water entering the water storage container 100 gradually increases, the level of the water gradually rises. When the liquid level crosses the water level control member 530, the air inside the water level control member 530 floats up the water level control member 530, and the water level control member 530 is seated against the bottom of the water tub 510, so that water does not enter the inside of the water tub 510 from the water discharge port 512, as shown in fig. 25;

when the liquid level rises to overflow the top of the water box 510, water flows in rapidly from the opening 511 at the top of the water box 510, so that the liquid level in the water box 510 rises, the floater 520 floats under the action of buoyancy, the rocker arm 580 connected with the floater 520 is jacked up, and the sealing gasket 12 arranged at one end of the rocker arm 580 connected with the upper cover 570 covers the control opening 503; since the control opening 503 is sealed, the pressure between the upper cover 570 and the elastic control member 550 is increased, and the elastic control member 550 is deformed downward by the water pressure, and finally, the lower portion of the elastic control member 550 presses the base 410 and blocks the inlet 501, thereby shutting off the water path, as shown in fig. 26.

When the water in the water storage container 100 is discharged through the water supply outlet 113, the water level control member 530 at the bottom of the water box 510 falls back to the hooked state when the water level is lower than the water level control member 530 as shown in fig. 26, and at this time, the water in the water box 510 flows out through the gap between the water level control member 530 and the water box 510, and the water level detecting means 500 is reset to the water input state shown in fig. 24 after the water is completely drained.

According to some embodiments of the present invention, as shown in fig. 3 and 4, the venturi channel 203 includes a contraction channel 211, a mixing channel 212, and an expansion channel 213 connected in sequence along a direction from the jet inlet 201 to the jet outlet 202, a flow area of the contraction channel 211 decreases along a direction from the jet inlet 201 to the jet outlet 202, a flow area of the expansion channel 213 increases along a direction from the jet inlet 201 to the jet outlet 202, and a water suction port 204 is provided at a connection of the jet inlet 201 and the contraction channel 211.

Thus, when water flows through the contraction flow channel 211 at a high speed, a suction effect is generated, and negative pressure is generated in the area and transmitted to the water suction port 204, so that the water suction port 204 has a water suction effect; the mixed water mixed with the sucked water finally flows out through the jet flow outlet 202 through the expanding flow passage 213. Wherein, the mixing channel 212 and the expanding channel 213 provide sufficient space for mixing and diffusion, so as to ensure the pressure (i.e. pressure resistance) of the jet outlet 202 and avoid the backflow to the water suction port 204 when the outer end of the jet outlet 202 has resistance water. Therefore, the water absorption device 200 generates better negative pressure in the pipeline resistance range of the shower head 30 and the shower head 30, ensures the water absorption flow, does not need external electricity or gas, and has simple structure and stable performance.

For example, as shown in fig. 3 and 4, the flow area of the constricted flow passage 211 is gradually reduced, and the longitudinal sectional profile line of the constricted flow passage 211 is configured in an arc shape protruding toward the central axis; the flow area of the expansion flow passage 213 is gradually increased, and the expansion flow passage 213 is configured in a truncated cone shape; the flow area of the jet inlet 201 is not smaller than the maximum flow area of the contraction flow path 211, and the flow area of the jet outlet 202 is larger than the maximum flow area of the expansion flow path 213.

According to some embodiments of the present invention, as shown in fig. 3 to 6, the water absorbing device 200 includes: a tube body 210 and a nozzle 220. The jet inlet 201, the jet outlet 202 and the venturi channel 203 are respectively arranged on the pipe body 210. The nozzle 220 is mounted to the pipe body 210, and a sealing member 11, such as an O-ring, may be disposed between the nozzle 220 and the pipe body 210 to enhance sealability. The nozzle 220 communicates with the jet inlet 201, the nozzle 220 having a jet channel 221 with a decreasing flow area in the direction from the jet inlet 201 to the jet outlet 202.

Due to the tapering action of the injection flow passage 221, the water flow is accelerated by the water pressure as it passes through the nozzle 220, so that the water flow can be injected into the venturi flow passage 203. For example, the flow area of the injection flow channel 221 is gradually reduced, and the injection flow channel 221 is configured in a truncated cone shape. Advantageously, the minimum diameter of the ejection flow channel 221 is less than 4mm, resulting in a faster ejection speed and a longer throw.

It can be understood that, as shown in fig. 5 and fig. 28-30, the water sucking device 200 can be installed at the front end of the shower head 30, the jet inlet 201 can communicate with the second water outlet 303 through the water outlet pipe 15, the water suction port 204 communicates with the water supply interface 113 through the water suction pipe, and the water suction pipe includes a positioning section 16, a water running section and a connecting section 17 which are connected in sequence, the upper portion of the water storage cavity 110 is provided with a stop 115, and the stop 115 is located above the highest water level of water in the water storage container 100. The positioning section 16 is hung on the gear 115, the water flowing section is arranged in the water outlet pipe 15, and the connecting section 17 is positioned outside the water outlet pipe 15 and connected with the water suction port 204. Thus, when the liquid level in the water storage container 100 is higher than the shower head 30, the water does not directly flow out of the shower head 30.

Alternatively, as shown in fig. 6 and 31, the water absorbing device 200 may be installed at the water outlet port 112, the jet inlet 201 is connected to the second water outlet 303 through a flange, and the suction port 204 is communicated with the water supply port 402 through the suction pipe 18.

Or, the water absorption device 200 is installed between the shower head 30 and the reversing valve 300, and the water absorption device 200 is connected with the shower head 30 and the reversing valve 300 through water pipes respectively; of course, the water absorbing device 200 may be built in the shower head 30 to improve performance.

The tube body 210 may be a copper member, a PPS (polyphenylene sulfide) and glass fiber member, an ABS (Acrylonitrile Butadiene Styrene), a PET (polyethylene terephthalate), a POM (polyoxymethylene) or a PP (Polypropylene). The nozzle 220 may be a copper piece, PPS (polyphenylene sulfide,polyphenylene sulfide Ether compounds) Glass fiber pieces, ABS (Acrylonitrile Butadiene Styrene), PET (polyethylene terephthalate), POM (polyoxymethylene) or PP (Polypropylene) pieces.

According to some embodiments of the present invention, as shown in fig. 3, 5 and 6, the central axis of the water scoops 204 is disposed obliquely with respect to the central axis of the venturi channel 203, thereby facilitating a reduction in turbulence to the water flow and a reduction in losses.

Further, as shown in fig. 3, the central axis of the water scoops 204 extends obliquely in a direction from the jet outlet 202 to the jet inlet 201 and radially outward of the pipe body 210, so that the flow direction of the water sucked by the water scoops 204 approaches the flow direction of the water injected by the nozzles 220, thereby further reducing the loss.

According to some embodiments of the present invention, as shown in fig. 3, the outlet 502 of the ejection flow channel 221 is disposed toward the constricted flow channel 211 and adjacent to the water suction port 204. So, do benefit to and reduce fluid loss, guarantee to mix the water effect. Advantageously, the outlet 502 of the injection flow passage 221 faces the contraction flow passage 211 in the axial direction of the tube body 210 and faces the water suction port 204 in the radial direction of the tube body 210.

According to some embodiments of the present invention, as shown in fig. 3 and 4, the minimum diameter of the convergent channel 211, the diameter of the mixing channel 212, and the minimum diameter of the divergent channel 213 are all d. That is, the flow area of the mixing channel 212 is constant in the direction from the jet inlet 201 to the jet outlet 202, resulting in better negative pressure and pressure resistance effects.

Optionally, the ratio of the maximum diameter to the minimum diameter of the contraction flow channel 211 is 2 to 2.5, and the ratio of the maximum diameter to the minimum diameter of the expansion flow channel 213 is 1.5 to 2; the expansion angle of the expansion flow channel 213 is 3 to 5 degrees; the length of the contraction flow channel 211 is 1d-3d, the length of the mixing flow channel 212 is 1d-3d, and the length of the expansion flow channel 213 is 2d-5 d. In this way, the water absorbing device 200 can be optimized while comprehensively considering the fluid loss, the pressure resistance, the negative pressure strength, the water absorbing effect, and the flow rate.

According to some embodiments of the present invention, as shown in fig. 3, the central axis of the venturi flow passage 203, the central axis of the tube body 210, and the central axis of the injection flow passage 221 coincide, so that the structure is simpler, and the water absorption effect and the fluid loss are more excellent.

According to some embodiments of the present invention, as shown in fig. 7 and 11, the direction valve 300 is switchable between an initial state and a direction state and the direction valve 300 includes: a valve body 310, a first valve spool 320, and a second valve spool 330.

The water inlet 301, the first water outlet 302 and the second water outlet 303 are arranged on the valve body 310, and the valve body 310 is provided with a first action cavity and a second action cavity. The first spool 320 is movably disposed within the first apply chamber between a first position shown in fig. 9 and a second position shown in fig. 11, the second spool 330 is movably disposed within the second apply chamber between an initial position shown in fig. 9 and a reverse position shown in fig. 11, and the second spool 330 is operatively associated with the first spool 320.

When the reversing valve 300 is in an initial state, the first valve core 320 is located at the first position and the second valve core 330 is located at the initial position, and the second valve core 330 only communicates the water inlet 301 and the first water outlet 302 to supply water to the water storage container 100; when the first water outlet 302 is disconnected from the water storage inlet, the first valve core 320 moves to the second position and drives the second valve core 330 to move to the reversing position, the second valve core 330 only communicates the water inlet 301 and the second water outlet 303, and the reversing valve 300 is switched to the reversing state.

Thus, when no water passes, the direction valve 300 is in the initial state; when water enters the valve body 310 from the water inlet 301, water flow firstly enters the water storage container 100 from the first water outlet 302; when the first water outlet 302 is disconnected from the water storage inlet, the first valve core 320 and the second valve core 330 are linked to change the direction of the water path, so that the water from the water inlet 301 is discharged from the second water outlet 303, and the cold water coming out first is collected by the water storage container 100, and the hot water coming out later can directly flow out from the shower head 30 for use.

According to the reversing valve 300 provided by the embodiment of the invention, the water path direction is changed by utilizing the linkage of the first valve core 320 and the second valve core 330, so that water entering from the water inlet 301 firstly flows out from the first water outlet 302 and then flows out from the second water outlet 303 when the first water outlet 302 is disconnected with the water storage container 100, the zero cold water function of the water heater is realized, and the reversing valve is simple in structure and high in reliability.

According to some embodiments of the present invention, as shown in fig. 7-11, the reversing valve 300 further comprises: and one end of the water inlet joint 340 is connected with the water inlet 301, and the other end of the water inlet joint 340 is connected with the water outlet of the water mixing valve or the water valve 20. Advantageously, in order to guarantee tightness and reliability, a sealing member 11, for example an O-ring, is provided between the water inlet fitting 340 and the valve body 310.

According to some embodiments of the present invention, as shown in fig. 7-11, the reversing valve 300 further comprises: and a water outlet joint 350, one end of the water outlet joint 350 is connected with the second water outlet 303, the other end of the water outlet joint 350 is connected with the nozzle 220, the head of the second valve spool 330 seals the end of the water outlet joint 350 when in the initial position and opens the end of the water outlet joint 350 when in the reversing position.

Advantageously, in order to ensure the sealing performance and reliability, a sealing member 11, such as an O-ring, is disposed between the outlet connector 350 and the valve body 310, a sealing member 11, such as an O-ring, is disposed between the head of the first valve spool 320 and the valve body 310, a sealing member 11, such as a profile ring, is disposed between the head of the second valve spool 330 and the outlet connector 350, and a sealing member 11, such as an O-ring, is disposed between the body of the second valve spool 330 and the valve body 310.

According to some embodiments of the present invention, as shown in fig. 7-11, the reversing valve 300 further comprises: a connecting rod 360, the connecting rod 360 is rotatably disposed on the valve body 310, and the connecting rod 360 is connected to the second spool 330. For example, the valve body 310 is provided with a fixing bracket 311, the connecting rod 360 is provided with a positioning hole 361, the fixing bracket 311 is provided with a mounting hole 312, the mounting shaft 304 passes through the mounting hole 312 and the positioning hole 361, and the mounting shaft 304 is matched with a nut to mount the connecting rod 360 on the fixing bracket 311; the second spool 330 has a fitting hole 331 formed in a main body thereof and a through hole 362 and an adaptation hole 363 formed in the connecting rod 360, the fitting shaft 305 passes through the through hole 362 and the fitting hole 331, and the fitting shaft 305 is engaged with a nut to fix the rear end of the second spool 330 in the adaptation hole 363.

When the direction valve 300 is in the initial state, the first valve core 320 abuts against the connecting rod 360; when the first water outlet 302 is disconnected from the water storage inlet, the first valve core 320 pushes the connecting rod 360 to rotate, and the connecting rod 360 drives the second valve core 330 to move to the reversing position. In this way, the interlocking of the first spool 320 and the second spool 330 is achieved with a simple structure.

Further, as shown in fig. 11, when the directional valve 300 is in the directional state, the first valve spool 320 may be separated from the connecting rod 360 to move to the first position, thereby achieving the reset of the first valve spool 320. For example, a cap nut 306 may be disposed on the cap 570 of the valve body 310, the cap nut 306 and the valve body 310 together define a first actuating chamber, and an actuating port 307 is disposed on the cap nut 306, and the tail end of the first valve element 320 extends out of the actuating port 307 to abut against the connecting rod 360.

Alternatively, as shown in fig. 8-11, the connecting rod 360 has a receiving cavity 364, a sealing pad 12 such as a rubber pad is disposed in the receiving cavity 364, and the tail end of the first valve core 320 is pressed against the sealing pad 12 in the initial state of the direction valve 300, so as to facilitate damping.

Advantageously, as shown in fig. 9 to 11, the first spool 320 and the second spool 330 are located on the same side of the rotation center of the connecting rod 360, so that the structure is more compact and the commutation reliability is more easily ensured.

According to some embodiments of the present invention, the first valve spool 320 moves from the first position to the second position under the static pressure of the water. Thus, when the first water outlet 302 is disconnected from the stored water inlet, the pressure of the water in the valve body 310 is rapidly increased from the dynamic pressure to the static pressure, the increased water pressure pushes the first valve spool 320 to move, and then the first valve spool 320 links the second valve spool 330 to switch the direction switching valve 300 to the direction switching state. Therefore, the direction of the water path is changed by the change of the pressure of the water through the reversing valve 300, and the reversing valve 300 does not need external electricity or gas, so that the structure is simpler, the reliability is higher, and the reversing valve is particularly suitable for household tap water with the water pressure within the range of 0.1MPa-1 MPa.

According to some embodiments of the present invention, as shown in fig. 9-11, the first valve spool 320 is provided with a first elastic member 371, and the first elastic member 371 has a force that normally urges the first valve spool 320 to the first position; the second valve body 330 is provided with a second elastic member 372, and the second elastic member 372 has a force for normally urging the second valve body 330 toward the initial position. For example, the first elastic member 371 and the second elastic member 372 are both springs. It will be appreciated that the head of the first valve spool 320 has a diameter greater than the diameter of the remainder of the first valve spool 320 and the head of the second valve spool 330 has a diameter greater than the diameter of the remainder of the second valve spool 330.

Thus, when the direction valve 300 is in the initial state, the first valve core 320 is pressed on the inner side of the valve body 310 by the first elastic member 371, and the second valve core 330 is pressed on the end of the water outlet joint 350 by the second elastic member 372 to block the second water outlet 303; when water flows into the water inlet joint 340, the pressure of the water and the force of the second elastic member 372 both act on the head of the second valve core 330, so that the head of the second valve core 330 blocks the end of the water outlet joint 350, and at this time, the water flows out of the first water outlet 302 and into the water storage container 100.

When the water storage inlet is disconnected from the first water outlet 302, the pressure inside the valve body 310 increases as the dynamic pressure becomes static pressure, and when it is disconnected from the first water outlet 302[(P₁*S₁-F₁-f₁)*1.4]>(P₂*S₂+F₂+f₂) When the first valve core 320 pushes the connecting rod 360, the connecting rod 360 drives the second valve core 330 to move, and the direction switching valve 300 is switched to the direction switching state. Wherein, P₁Is the static pressure, S, to which the head of the first valve spool 320 is subjected₁Is the force area of the head of the first valve spool 320, F₁Is the force of the first elastic member 371, f₁Is the friction force, P, experienced by the first valve element 320₂Is the static pressure, S, to which the head of the second spool 330 is subjected₂Is the force-receiving area of the head of the second spool 330, F₂Is the force of the second elastic member 372, f₂The friction force applied to the second spool 330 is represented by a value of 1.4, which is a pressure ratio generated by the lever principle of the connecting rod 360.

When the water outlet joint 350 is opened at the head of the second valve core 330, the water inlet 301 is communicated with the second water outlet 303, at this time, the water pressure is changed from static pressure to dynamic pressure, the pressure is reduced, the thrust force applied to the first valve core 320 is reduced again, and the first valve core is pressed back to the first position by the first elastic piece 371; after the water outlet joint 350 is opened by the second valve core 330, the force-bearing area of the left side of the head of the second valve core 330 is larger than that of the right side, so that under the action of water pressure, the second valve core 330 can continuously move rightwards until the special-shaped sealing ring seals the water path between the water inlet 301 and the first water outlet 302, and the reversing action is completed.

After the water is turned off, the second valve core 330 is reset to the initial position under the elastic force of the second elastic member 372 to wait for the next use of boiled water.

According to some embodiments of the present invention, as shown in fig. 9 to 11, the central axis of the first spool 320 coincides with the central axis of the first motion chamber, and the central axis of the second spool 330 coincides with the central axis of the second motion chamber, so that the structure is simple and the state switching of the direction valve 300 is smooth.

According to some embodiments of the present invention, as shown in fig. 9 to 11, the central axis of the first valve spool 320 is parallel to the central axis of the second valve spool 330, and the central axis of rotation of the connecting rod 360 is perpendicular to the central axis of the second valve spool 330, so that the structure is simpler and more compact, and the linkage between the first valve spool 320, the second valve spool 330 and the connecting rod 360 is smoother and more reliable.

In order to ensure that the water flow used by the user is not excessively affected by the suction of no water, further, as shown in fig. 1 and 12-16, the cut-off device 400 is further provided with a water replenishing interface 403, and the water replenishing interface 403 is communicated with the second water outlet 303. The cut-off device 400 is configured to be switchable between a water replenishing state shown in fig. 13 and 14 and a water supplying state shown in fig. 15 and 16, the cut-off device 400 blocks the communication port 401 and communicates the water supply interface 402 and the water replenishing interface 403 in the water replenishing state, and the cut-off device 400 blocks the water replenishing interface 403 and opens the communication port 401 to communicate the water supply interface 402 and the communication port 401 in the water supplying state, so that when the water storage container 100 is not supplied with water from the water suction port 204, the water suction port 204 can suck hot water from the second water outlet 303 to replenish the shower head 30, thereby increasing the water flow rate of the shower head 30 and ensuring the bathing experience.

Advantageously, the refill port 403 communicates with the second outlet 303 through a stop tube 19 having a diameter not greater than 3 mm. For example, the water level detecting pipe 13 may be a stainless steel hose or an explosion-proof plastic hose, and the cutoff pipe 19 may be a stainless steel hose or an explosion-proof plastic hose.

Of course, the water supplement interface 403 can also be connected to the cold water inlet of the water mixing valve or the water valve 20, so that the water temperature of the outlet water of the shower head 30 is not substantially fluctuated after the water in the water storage container 100 and the water in the water storage container 100 are consumed.

In some embodiments of the present invention, as shown in fig. 12-16, the cutoff device 400 includes: a base 410 and a floating assembly. The base 410 has a communication port 401, a water supply port 402, and a water replenishment port 403. The floating assembly is floatably disposed on the base 410 between a water replenishing position and a water supplying position, the cut-off means 400 is switched to a water replenishing state when the floating assembly falls to the water replenishing position under the action of its own gravity, and the cut-off means 400 is switched to a water supplying state when the floating assembly floats to the water supplying position under the action of buoyancy of water.

Therefore, the cut-off device 400 can ensure that water in the water storage container 100 preferentially flows to the water suction port 204 when the water storage container 100 has the water supply water suction port 204, and can ensure that water continuously flows out from the water supply outlet 113 by supplying water from the second water outlet 303 to the water suction port 204 through the water replenishing interface 403 when the water storage container 100 has no water supply water suction port 204, so that the cut-off device 400 realizes the preferential water supply and the continuous water outlet of the water storage container 100 by utilizing buoyancy and gravity, is favorable for realizing the 'zero cold water' function of the water heater, and has simple structure and high reliability.

It should be understood that the water storage container 100 is not supplied with water from the outside in the description of the present invention, including both the case where the water storage container 100 is completely empty of water and the case where a part of water remains in the water storage container 100.

Further, as shown in fig. 12 to 16, the floating assembly includes: a float 420 and a piston 430. It can be understood that the float 420 is a sealed ball filled with gas, and the float 420 is provided at the communication port 401 to open and close the communication port 401 while floating up and down. For example, a stop sealing ring 404 may be disposed at the communication port 401 to enhance the sealing property between the base 410 and the floating ball 420. The piston 430 is movably disposed in the base 410, and the piston 430 is connected to the float 420, and the piston 430 moves up and down under the driving of the float 420. The piston 430 is in communication with the refill port 403 and the water supply port 402 when the floating assembly is in the refill position, and the piston 430 blocks the refill port 403 when the floating assembly is in the water supply position.

In some embodiments of the present invention, as shown in fig. 12 to 16, the piston 430 has a water through hole 431, a water through channel 432 communicating the water through hole 431 with the water supply port 402, and a shielding portion 433, the water through hole 431 is communicated with the water supplement port 403 when the floating assembly is in the water supplement position, and the shielding portion 433 shields the water supplement port 403 when the floating assembly is in the water supply position.

Therefore, in the case that the water storage container 100 is not supplied with water to the water suction port 204, the float 420 falls down on the stop sealing ring 404 by gravity to seal the base 410 and the inner space of the water storage container 100, as shown in the water replenishing position shown in fig. 13 and 14, at this time, the water through hole 431, the water through passage 432 and the water replenishing port 403 on the piston 430 to which the float 420 is connected are communicated, and the water through hole 431 and the water through passage 432 are further communicated with the water supply port 402, so that when the water replenishing port 403 has water flowing, the stop device 400 is in the water replenishing state, and the water flow path is shown by the arrow in fig. 13 and 14.

After water enters the water storage container 100, the liquid level gradually rises, as shown in fig. 15 and 16, the float 420 floats under the action of buoyancy, and simultaneously, the piston 430 connected with the float 420 floats together, so that the originally sealed channel is opened, the water supply port 402 is communicated with the inside of the water storage container 100, and the piston 430 pulled by the float 420 shields the water supplement port 403 to play a role of intercepting, only a small amount of water can flow in from the water supplement port 403, so as to ensure that the water stored in the water storage container 100 preferentially flows out from the water supply port 402, at this time, the stopping device 400 is in a water supply state, and the water flow path is shown by arrows in fig. 15 and 16.

When the water level in the water container 100 drops to the height of the stop sealing ring 404, the float 420 blocks the upper portion of the base 410 again with the drop of the liquid level, the passage is closed, and the stop device 400 is switched to the water replenishing state.

In some embodiments of the present invention, as shown in fig. 12 to 16, the water through hole 431 is plural, the plural water through holes 431 are arranged at intervals along the circumferential direction of the piston 430, and each water through hole 431 is configured as a long bar shape extending along the axial direction of the piston 430, so that the water flow can be ensured to be smooth.

Advantageously, as shown in fig. 12 to 16, the water through hole 431 is located above the shielding portion 433, and the water through channel 432 passes through the shielding portion 433 in the axial direction of the piston 430. Thus, the shielding portion 433 faces the water charging port 403 after the piston 430 moves upwards, so that the flow stopping effect is good, and water can flow to the water supply port 402 from top to bottom.

According to some embodiments of the present invention, as shown in fig. 12 to 16, the communication port 401 is located above the water charging port 403, and the water charging port 403 is located above the water supply port 402, so that the structure is compact, the space utilization rate is high, and the flow path of water is short.

According to some embodiments of the present invention, as shown in fig. 12 to 16, the central axis of the communication port 401, the central axis of the refill port 403, and the central axis of the water supply port 402 are arranged perpendicular to each other. For example, the central axis of the communication port 401 and the axial direction of the piston 430 are both oriented in the up-down direction, the central axis of the water refill port 403 and the central axis of the water supply port 402 are both oriented in the horizontal direction, and the central axis of the water refill port 403 is perpendicular to the central axis of the water supply port 402. Therefore, the water can flow smoothly, and the water path arrangement is simple.

According to some embodiments of the present invention, the lower end of the piston 430 may be provided with a stopper for preventing the floating assembly from falling off the base 410, and the stopper abuts against the base 410 when the stopping device 400 is in the water supply state, so as to limit the floating ball 420.

According to some embodiments of the present invention, as shown in fig. 12-16, the cutoff device 400 for a water heater further includes: and the top cover 440 is used for limiting the floating assembly, the top cover 440 is installed on the base 410 and is positioned above the floating ball 420, and the top cover 440 is provided with a water through hole 441. For example, the top cover 440 covers the base 410, the float 420 is located in the top cover 440, when the water container 100 is filled with water, the water enters the top cover 440 through the water hole 441, and after the float 420 floats, the top cover 440 can limit the device of the float 420.

It can be understood that the reversing valve 300 can also be an electromagnetic reversing valve 300, a motor-driven rocker arm 580, a motor-driven screw rod and other electric reversing valves 300 as long as the reversing function can be realized; the cut-off device 400 may also be an electromagnetic water valve as long as the water-free cut-off function can be ensured; the water level detecting device 500 may also be configured to detect an electronic liquid level in cooperation with an electromagnetic switch valve. The present invention is not particularly limited in this regard.

The operation of the mixing device 10 for a water heater according to one embodiment of the present invention will be described with reference to the accompanying drawings.

When the water mixing device 10 is installed and used, firstly, the amount of cold water from the water heater to the shower head 30 is determined, and the height of the water level detection device 500 can be adjusted by rotating the water level adjusting piece 540, so that different liquid level heights, namely different volumes, are set;

when no water is used, the whole device is in a water-free reset state, at the moment, the reversing valve 300 is in an initial state, and the water level detection device is in a water inlet state;

after the water mixing valve or the water valve 20 is opened, water flows into the water inlet 301 of the reversing valve 300 through a pipeline, flows out of the first water outlet 302, enters the inlet 501 of the water level detection device 500, and flows into the water storage container 100 through the outlet 502 of the water level detection device 500;

since the suction pipe connected to the stopping means 400 is caught at the back of the water storage container 100, when water is present in the stopping means 400, although the float floats to open the passage communicating with the inside of the water storage container 100, no water flows out to the shower head 30 through the suction pipe, and thus the water level inside the water storage container 100 is gradually raised;

when the liquid level gradually rises to the preset high level of the water level detection device 500, water flows into the water tank 510, the float 520 of the water level detection device 500 floats up, and the water path is sealed by the elastic control member 550, so that the water pressure of the water level detection device 500 and the reversing valve 300 rapidly rises;

the rising water pressure pushes the first valve core 320 of the reversing valve 300 to move, the second valve core 330 is linked to change the direction of the water path, and the water from the water inlet 301 flows out of the second water outlet 303 and enters the nozzle 220 of the water suction device 200;

when water flows through the water suction device 200, negative pressure is generated through the internal Venturi channel 203, and the top of the stopping device 400 is communicated with the inside of the water storage container 100, so that water in the water storage container 100 is sucked through the water suction port 204 through the water suction pipe, and the sucked water and hot water flowing out of the water heater are mixed in the water suction device 200 and then flow into the shower head 30, namely the shower head 30 discharges water, and simultaneously, the shower is prompted to be available;

during bathing, the water level of the water in the water storage container 100 will gradually drop, and when the water level drops to be lower than the water level detection device 500, the water level detection device 500 will reset to a water inlet state; when the liquid level reaches a preset low water level, the floating ball 420 in the stopping device 400 falls down and blocks the communication port 401, the piston 430 is communicated with the water replenishing interface 403 and the water supplying interface 402, the water sucking port 204 sucks water flowing out of the second water outlet 303, the water outlet flow of the shower head 30 is ensured, and the influence of noise is avoided;

after bathing is finished, the water mixing valve or the water valve 20 is closed, the reversing valve 300 is reset (namely switched to the initial state) under the action of the spring force, and the reversing valve 300 is changed into the water outlet state of the first water outlet 302 to wait for next use.

Because the water in the pipeline is hot water when water is switched midway in bathing, the function of 'zero cold water' is not needed, therefore, when water is switched off in the bathing process and then boiled water is boiled, the water mixing device 10 is not needed to be used for collecting cold water, at the moment, the handle 14 is pulled by hands, the handle 14 is connected to the rocker 580 of the water level detection device 500 through a pull wire, after the rocker 580 is lifted up, the water channel passing through the water level detection device 500 is cut off, the reversing valve 300 can be in a reversing state, therefore, hot water can directly flow out from the shower head 30, and the function of quickly discharging water from the water shower head 30 which is switched midway is realized.

In the above process, when the bathing temperature (i.e. the water outlet temperature of the shower head 30) is set at 40 ℃, the water pressure is 0.2MPa, the flow rate of the shower head 30 is 6L/min, and the water suction flow rate is 1.0L/min, the stored water in the water storage container 100 sucked by the water suction port 204 is mixed with the hot water, and then the following mixing temperatures are obtained:

temperature of water storage	Water outlet temperature of shower head when water is consumed	The water outlet temperature of the shower head when the stored water is consumed	Temperature fluctuation
				5℃	35℃	40℃	-5℃
10℃	35.7℃	40℃	-4.3℃
				20℃	37.1℃	40℃	-2.9℃
30℃	38.5℃	40℃	-1.5℃

In the actual use process of a user, because the water absorption temperature in winter is lower, the set bath temperature can be properly increased, such as 41 ℃ or 42 ℃, so that comfortable water use is ensured; the temperature of the outlet water can also be increased by reducing the flow of the sucked cold water, but the temperature is in accordance with the practical use habit of the user and the stored cold water can be recycled in a bathing period. When the water absorption temperature reaches 20 ℃ in spring and autumn or even summer, the mixed water temperature reaches 37 ℃ after the previously stored cold water is mixed, and the condition that the bath can be directly carried out is completely achieved.

It will be appreciated that when the stored cold water has been absorbed, the outlet water temperature will return to normal.

The water mixing device 10 for the water heater according to the embodiment of the invention can be directly connected in series in a water path system to solve the problem of cold water outlet at the front end of a bath, so that a water mixing valve or a water valve 20 and a shower head 30 in a home of a user do not need to be modified.

The water heater according to the second aspect of the present invention includes the water mixing device 10 for a water heater according to the first aspect of the present invention. For example, the water heater may be a gas water heater, an electric water heater, a wall-hanging stove water heater, an air energy water heater, or other water heaters with a relatively large flow rate.

According to the water heater provided by the embodiment of the invention, the water mixing device 10 for the water heater has the function of 'zero cold water', and is simple in structure, low in cost, few in installation procedures, safe, reliable, energy-saving, low in use requirement and strong in applicability.

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

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. The first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "a specific embodiment," "an example" or "some examples" or the like are intended to mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A mixing device for a water heater, comprising:

the water storage container is provided with a water inlet interface, a water outlet interface, a water storage inlet and a water supply outlet, and the water inlet interface is suitable for being communicated with a water outlet of a water mixing valve or a water valve of the water heater;

the water absorption device is arranged outside the water storage container and is provided with a jet flow inlet, a jet flow outlet and a Venturi flow channel which is respectively communicated with the jet flow inlet and the jet flow outlet, and a water absorption port is arranged at the joint of the jet flow inlet and the Venturi flow channel;

the reversing valve is arranged in the water storage container and is provided with a water inlet, a first water outlet and a second water outlet, the water inlet is connected with the water inlet interface, the first water outlet is selectively communicated with the water storage inlet, the second water outlet is communicated with the jet flow inlet through the water outlet interface, and the reversing valve is constructed to control water entering from the water inlet to flow out from the first water outlet firstly and flow out from the second water outlet when the first water outlet is disconnected from the water storage inlet;

the water level detection device is arranged in the water storage container and disconnects the first water outlet and the water storage inlet when the water level of water in the water storage container reaches a preset high water level;

a shut-off device installed in the water storage container and having a communication port communicating with an inner space of the water storage container and a water supply interface communicating with the water suction port through the water supply outlet, the shut-off device being configured to close the communication port when a level of water in the water storage container is lower than a preset low level.

2. The mixing device for a water heater according to claim 1, characterized in that the water level detection means are switchable between a water inlet condition and a cut-off condition and comprise:

a water box having an open mouth and a drain opening, the open mouth being located above the drain opening;

a float floatably provided in the water tank and exposed from the opening;

a water level control member provided at the drain opening and configured to control water to enter the water cartridge from the open opening and to exit the water cartridge from the drain opening;

the water inlet control assembly is arranged on the water box and is provided with an inlet, a control port and an outlet positioned between the inlet and the control port, the inlet is respectively communicated with the control port and the first water outlet, and the outlet forms the water storage inlet;

a rocker arm rotatably mounted on a top wall of the float and connected to the water inlet control assembly, wherein,

when the water inlet state is realized, the rocker arm opens the control port, and the water inlet control assembly is communicated with the inlet and the outlet;

when the water inlet control assembly is in the stop state, the rocker arm closes the control port, and the water inlet control assembly disconnects the inlet and the outlet.

3. The mixing device for a water heater of claim 2, wherein the inlet control assembly comprises:

the water inlet seat is arranged in a containing cavity formed on the side wall of the water box, and the inlet and the outlet are arranged on the water inlet seat;

the upper cover is detachably arranged on the water inlet seat and defines a water inlet cavity together with the water inlet seat, and the control port is arranged on the upper cover;

the elastic control piece is clamped between the upper cover and the water inlet seat and is positioned in the water inlet cavity, and the elastic control piece is communicated with the inlet and the outlet in the water inlet state and blocks the inlet in the cut-off state through self elastic deformation.

4. The mixing device for a water heater according to claim 3, wherein the upper cover is provided with a guide post, a part of the elastic control piece corresponding to the inlet is sleeved on the guide post, and a water passing gap for communicating the inlet and the control port is defined between the elastic control piece and the guide post.

5. The mixing device for a water heater according to claim 3, wherein the outlets are arranged at intervals along the circumference of the inlet, a support rib is defined between two adjacent outlets, and the elastic control member abuts against the support rib in the cut-off state.

6. The mixing device for a water heater according to claim 2, characterized in that the water level detection device further comprises:

the water level adjusting piece is rotatably arranged in the water storage container, the water box is abutted to the inner wall of the water storage container, and the water level adjusting piece is in threaded fit with the water box so as to convert the self rotary motion into the lifting motion of the water box.

7. The water mixing device for the water heater according to claim 1, wherein the venturi flow passage comprises a contraction flow passage, a mixing flow passage and an expansion flow passage which are connected in sequence in the direction from the jet flow inlet to the jet flow outlet, the flow area of the contraction flow passage is reduced in the direction from the jet flow inlet to the jet flow outlet, the flow area of the expansion flow passage is increased in the direction from the jet flow inlet to the jet flow outlet, and the water suction port is arranged at the connection position of the jet flow inlet and the contraction flow passage.

8. The mixing device for a water heater according to claim 1, characterized in that said water suction device comprises:

the jet flow inlet, the jet flow outlet and the Venturi flow channel are respectively arranged on the pipe body;

a nozzle mounted to the tube body and in communication with the jet inlet, the nozzle having a jet flow channel with a reduced flow area in a direction from the jet inlet to the jet outlet.

9. The mixing device for a water heater according to claim 1, characterized in that the reversing valve is switchable between an initial state and a reversing state and comprises:

the valve body is provided with the water inlet, the first water outlet, the second water outlet, a first action cavity and a second action cavity;

the first valve core is movably arranged in the first action cavity between a first position and a second position;

a second valve core movably arranged in the second action cavity between an initial position and a reversing position and linked with the first valve core,

when in the initial state, the first valve core is located at the first position and the second valve core is located at the initial position, and the second valve core only communicates the water inlet and the first water outlet to feed water into the water storage container;

when the first water outlet is disconnected from the water storage inlet, the first valve core moves to the second position and drives the second valve core to move to the reversing position, the second valve core only communicates the water inlet and the second water outlet, and the reversing valve is switched to the reversing state.

10. The mixing device for a water heater of claim 9, wherein the diverter valve further comprises:

a connecting rod rotatably arranged on the valve body and connected with the second valve core, wherein,

in the initial state, the first valve core is abutted against the connecting rod; when the first water outlet is disconnected with the water storage inlet, the first valve core pushes the connecting rod to rotate, and the connecting rod drives the second valve core to move to the reversing position.

11. The mixing device for a water heater of claim 10, wherein the first spool is disengageable from the linkage rod to move to the first position in the switch state.

12. The mixing device for a water heater of claim 9, wherein the first valve spool moves from the first position to the second position under the static pressure of the water.

13. The mixing device for a water heater of claim 9, wherein the first valve element is provided with a first resilient member having a force urging the first valve element towards the first position;

and a second elastic part is arranged on the second valve core and has a force for normally driving the second valve core to the initial position.

14. The mixing device for a water heater according to claim 1, wherein the cut-off device is provided with a water charging port, the cut-off device is configured to be switchable between a water charging state and a water supplying state, the cut-off device blocks the communication port and communicates the water supplying port and the water charging port in the water charging state, and the cut-off device blocks the water charging port and opens the communication port to communicate the water supplying port and the communication port in the water supplying state, wherein the water charging port communicates with the second water outlet, or the water charging port communicates with a cold water inlet of a mixing valve or a water valve of the water heater.

15. The mixing device for a water heater according to claim 14, characterized in that the cut-off means comprise:

the base is provided with the communication port, the water supply interface and the water replenishing interface;

the floating assembly is arranged on the base in a floating mode between the water supplementing position and the water supplying position, the floating assembly falls to the water supplementing position under the action of self gravity, the stopping device is switched to the water supplementing state, and the floating assembly floats to the water supplying position under the action of buoyancy of water, and the stopping device is switched to the water supplying state.

16. The mixing device for a water heater of claim 15, wherein the floating assembly comprises:

the floating ball is arranged at the communication port in a vertically floating manner to open and close the communication port;

the piston is movably arranged in the base and connected with the floating ball, the floating assembly is arranged at the water supplementing position, the piston is communicated with the water supplementing interface and the water supply interface, and the floating assembly is arranged at the water supply position, and the piston covers the water supplementing interface.

17. A mixing device for a water heater according to any one of claims 1-15, wherein the water inlet and outlet connections are provided on a bottom wall of the water holding container, a portion of the bottom wall of the water holding container projecting downwardly to form a water discharge channel, the water supply outlet is provided on an inner wall of the water discharge channel and the cut-off device is mounted in the water discharge channel.

18. The mixing device for a water heater according to any one of the claims 1 to 15, wherein the jet inlet is communicated with the second water outlet through a water outlet pipe, the water suction port is communicated with the water supply port through a water suction pipe, the water suction pipe comprises a positioning section, a water running section and a connecting section which are connected in sequence, a gear is arranged at the top of the water storage container, the positioning section is hung on the gear and the water running section is arranged in the water outlet pipe, the connecting section is arranged outside the water outlet pipe to be connected with the water suction port, or,

the jet inlet is connected with the second water outlet through a flange, and the water suction port is communicated with the water supply interface through a water suction pipe.

19. A water heater comprising a mixing device for a water heater according to any one of claims 1-18.