CN110906029B

CN110906029B - Reversing valve for water heater, water mixing device and water heater

Info

Publication number: CN110906029B
Application number: CN201811088503.3A
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: 2024-01-09
Anticipated expiration: 2038-09-18
Also published as: CN110906029A

Abstract

The invention discloses a reversing valve for a water heater, a water mixing device and the water heater, wherein the reversing valve comprises: the valve body is provided with a water inlet, a first water outlet, a 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 the initial position and the reversing position and is linked with the first valve core, and when the first valve core is positioned at the first position and the second valve core is positioned at the initial position, 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 container, the first valve core moves to the second position and drives the second valve core to move to the reversing position, and the second valve core is only communicated with the water inlet and the second water outlet. The reversing valve for the water heater is beneficial to realizing the zero cold water function of the water heater, and has the advantages of simple structure and high reliability.

Description

Reversing valve for water heater, water mixing device and water heater

Technical Field

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

Background

Related art water heaters having a "zero cold water" function generally circulate water in a hot water pipe by a water pump to perform preheating, so that a user can directly use hot water. The water heater with the water return pipe forms a loop by using the water return pipe and the hot water pipe, and the water heater without the water return pipe constructs the loop by a device with a check valve like an H valve.

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

In addition, 70% of users are not provided with a water return pipeline, the users can use a cold water pipe and an H valve to construct a loop, hot water flows through the cold water pipe in the circulation process, and when a cold water tap is opened after preheating, hot water flows out, and 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 ℃, the RO membrane of the water purifier may be directly damaged.

In addition, the unnecessary waterway is heated in the cyclic preheating process, and the waste gas and the energy are not saved; moreover, because the circulation flow is smaller, the minimum temperature rise of the water heater is required, otherwise, when the water inlet temperature is higher in summer, the condition that the water inlet temperature exceeds the temperature and cannot be used can occur. In addition, due to the ageing of the pipelines and the large pipeline resistance, part of users have smaller circulating flow and cannot use the zero cold water function.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the reversing valve for the water heater, which has the advantages of simple structure, high reliability and the like and is beneficial to realizing the zero cold water function of the water heater.

The invention also provides a water mixing device for the water heater, which is provided with the reversing valve for the water heater.

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

According to an embodiment of the first aspect of the invention, a diverter valve for a water heater is switchable between an initial state and a diverter state and comprises: the water mixing valve comprises a valve body, a water inlet, a first water outlet, a second water outlet, a first action cavity and a second action cavity, wherein the water inlet is suitable for being communicated with a water mixing valve or a water outlet of a water valve of the water heater, the first water outlet is suitable for being selectively communicated with a water storage container, and the second water outlet is suitable for being connected with a shower head of the water heater; 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 positioned at the first position, the second valve core is positioned 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 container, 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 is only communicated with the water inlet and the second water outlet, and the reversing valve is switched to the reversing state.

According to the reversing valve for the water heater, disclosed by the embodiment of the invention, the direction of a waterway is changed by utilizing the linkage of the first valve core and the second valve core, so that water entering from the water inlet flows out from the first water outlet firstly, and then flows out from the second water outlet when the first water outlet is disconnected from the water storage container, thereby being beneficial to realizing the zero cold water function of the water heater, and the reversing valve is simple in structure and high in reliability.

In addition, the reversing valve for the water heater according to the embodiment of the invention has the following additional technical characteristics:

according to some embodiments of the invention, the reversing valve for a water heater further comprises: the connecting rod is rotatably arranged on the valve body and connected with the second valve core, and the first valve core is propped against the connecting rod in the initial state; when the first water outlet is disconnected from the water storage container, 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.

Further, in the reverse state, the first spool is separable from the link to move to the first position.

Advantageously, the first and second spools are located on the same side of the rotational center of the connecting rod.

In some embodiments of the invention, the central axis of the first spool is parallel to the central axis of the second spool, and the central axis of rotation of the connecting rod is perpendicular to the central axis of the second spool.

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

According to some embodiments of the invention, the first valve element is provided with a first elastic member, and the first elastic member has a force for normally driving the first valve element to the first position.

According to some embodiments of the invention, a second elastic member is provided on the second valve element, and the second elastic member has a force for normally driving the second valve element to the initial position.

According to some embodiments of the invention, the central axis of the first spool coincides with the central axis of the first actuation chamber and the central axis of the second spool coincides with the central axis of the second actuation chamber.

According to some embodiments of the invention, the reversing valve for a water heater further comprises: and one end of the water inlet connector is connected with the water inlet, and the other end of the water inlet connector is suitable for being connected with the water outlet of the water mixing valve or the water valve.

According to some embodiments of the invention, the reversing valve for a water heater further comprises: the water outlet connector, one end of the water outlet connector is connected with the second water outlet, the other end of the water outlet connector is suitable for being connected with the water inlet end of the shower head, the second valve core is used for plugging one end of the water outlet connector when in the initial position, and the second valve core is used for opening one end of the water outlet connector when in the reversing position.

According to a second aspect of the present invention, a water mixing device for a water heater includes: a water storage container having a water storage inlet and a water supply outlet; according to the reversing valve for the water heater, provided by the embodiment of the first aspect of the invention, the first water outlet and the water storage inlet can be selectively communicated; the water level detection device is used for disconnecting the first water outlet from the water storage inlet when the water level of water in the water storage container reaches a preset high water level.

According to the water mixing device for the water heater, the reversing valve for the water heater is utilized, and the zero cold water function can be realized without establishing a circulation 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, so that the structure is simple, and the installation procedure is few; because no water path is circulated, the situation that a cold water pipe is mixed with hot water and other water treatment equipment is damaged is avoided, and the safety and the reliability are high; the condition that the pipelines except the hot water pipeline are heated is avoided, so that the gas and energy are saved; the water outlet flow is normal water flow because no water way is circulated, and the minimum temperature rise of the water heater is not particularly required; as long as the water pressure and the flow are in the normal range, the water mixing device can be adopted in the case of pipeline aging, and has strong applicability.

According to a third aspect of the invention, the water heater comprises a water mixing device for the water heater according to the second 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, less in installation procedure, safe and 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 view of a water mixing device for a water heater according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the operation of a water 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 diagram of a water absorbing device according to an embodiment of the present invention;

fig. 5 is a perspective view of a tube body of the 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 present invention;

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

fig. 9 is a sectional view of the reversing valve in an initial state according to an embodiment of the present invention;

fig. 10 is a sectional view during switching of the reversing valve from the initial state to the reversing state according to the embodiment of the present invention;

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

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 the shut-off device in a water supplementing state according to an embodiment of the present invention;

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

fig. 15 is a sectional view of the shut-off device in a water supply state according to an embodiment of the present invention;

fig. 16 is a sectional view of the shut-off device in a water supply state according to an embodiment of the present invention;

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

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

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

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

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

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

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

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

Reference numerals:

a water mixing device 10, a sealing member 11, a sealing gasket 12,

A water storage container 100, a fixing ring 101,

A water absorbing device 200, a jet inlet 201, a jet outlet 202, a venturi flow channel 203, a water absorbing port 204, a pipe body 210, a convergent flow channel 211, a mixing flow channel 212, an divergent flow channel 213, a nozzle 220, a jet flow channel 221,

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

Shut-off device 400, communication port 401, water supply port 402, water replenishment port 403, shut-off seal ring 404, base 410, float ball 420, piston 430, water passing hole 431, water passing channel 432, shielding part 433, top cover 440, water passing hole 441,

The water level detecting device 500, the inlet 501, the outlet 502, the control port 503, the water gap 504, the water box 510, the opening 511, the water outlet 512, the screw hole 513, the housing chamber 514, the float 520, the water level control member 530, the hook 531, the water level adjusting member 540, the adjusting operation groove 541, the elastic control member 550, the water inlet seat 560, the click 561, the support rib 562, the upper cover 570, the boss 571, the guide post 572, the mounting bracket 573, the rocker arm 580, the misoperation adjusting structure 581,

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

Detailed Description

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

A reversing valve 300 for a water heater according to an embodiment of the first aspect of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, 2 and 7 to 11, the reversing valve 300 for a water heater according to an embodiment of the present invention is switchable between an initial state and a reversing state and includes: a valve body 310, a first spool 320, and a second spool 330.

Specifically, the valve body 310 has a water inlet 301, a first water outlet 302, a second water outlet 303, a first actuation chamber, and a second actuation chamber. The water inlet 301 is adapted to communicate with a water mixing valve of the water heater or a water outlet of the water valve 20, the first water outlet 302 is adapted to selectively communicate with the water reservoir 100, and the second water outlet 303 is adapted to be connected with a shower head 30 of the water heater.

The first spool 320 is movably disposed in the first actuating chamber between a first position shown in fig. 9 and a second position shown in fig. 11, the second spool 330 is movably disposed in the second actuating chamber between an initial position shown in fig. 9 and a reversing position shown in fig. 11, and the second spool 330 is interlocked with the first spool 320.

In the 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 is only communicated with the water inlet 301 and the first water outlet 302 to feed water into the water storage container 100; when the first water outlet 302 is disconnected from the water storage container 100, 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 with 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 reversing valve 300 is in an initial state; when water enters the valve body 310 from the water inlet 301, the 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 container 100, the first valve core 320 is linked with the second valve core 330 to change the direction of the water path, so that water from the water inlet 301 is discharged from the second water outlet 303, and the cold water discharged first is collected by the water storage container 100, and the hot water discharged later can directly flow out of the shower 30 for use by a user.

According to the reversing valve 300 for the water heater, the direction of a waterway 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 flows out from the first water outlet 302 first, and flows out from the second water outlet 303 when the first water outlet 302 is disconnected from the water storage container 100, thereby being beneficial to realizing the zero cold water function of the water heater, 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 to 11, the reversing valve 300 for a water heater further includes: the water inlet connector 340, one end of the water inlet connector 340 is connected with the water inlet 301 and the other end is adapted to be connected with the water outlet of the mixing valve or valve 20. Advantageously, in order to ensure tightness and reliability, a sealing element 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 to 11, the reversing valve 300 for a water heater further includes: the water outlet connector 350, wherein one end of the water outlet connector 350 is connected with the second water outlet 303, the other end of the water outlet connector 350 is suitable for being connected with the water inlet end of the shower head 30, the head of the second valve core 330 is used for plugging the one end of the water outlet connector 350 when in an initial position, and the one end of the water outlet connector 350 is opened when in a reversing position.

Advantageously, in order to ensure tightness and reliability, a sealing element 11, for example an O-ring, is provided between the outlet fitting 350 and the valve body 310, a sealing element 11, for example an O-ring, is provided between the head of the first valve cartridge 320 and the valve body 310, a sealing element 11, for example a profiled sealing ring, is provided between the head of the second valve cartridge 330 and the outlet fitting 350, and a sealing element 11, for example an O-ring, is provided between the body of the second valve cartridge 330 and the valve body 310.

According to some embodiments of the present invention, as shown in fig. 7 to 11, the reversing valve 300 for a water heater further includes: a link 360, the link 360 being rotatably provided on the valve body 310, and the link 360 being 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 body provided with an assembly hole 331 and the link 360 is provided with a through hole 362 and an assembly hole 363, the assembly shaft 305 passes through the through hole 362 and the assembly hole 331, and the assembly shaft 305 is engaged with a nut to fix the tail end of the second spool 330 in the assembly hole 363.

Wherein, in the initial state, the first valve core 320 is propped against the connecting rod 360; when the first water outlet 302 is disconnected from the water storage container 100, 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. Thus, the first and second spools 320 and 330 are interlocked with a simple structure.

Further, as shown in fig. 11, in the reversing state, the first valve cartridge 320 may be separated from the link 360 to move to the first position, thereby achieving the reset of the first valve cartridge 320. For example, a cap nut 306 may be disposed on the upper cap 570 of the valve body 310, the cap nut 306 and the valve body 310 together define a first actuating chamber, the cap nut 306 is provided with an actuating port 307, and the tail end of the first valve element 320 extends from 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, and a sealing pad 12, such as a rubber pad, is disposed in the receiving cavity 364, and the tail end of the first valve element 320 abuts against the sealing pad 12 in the initial state of the reversing valve 300, so as to facilitate buffering and vibration damping.

Advantageously, as shown in fig. 9 to 11, the first and second spools 320 and 330 are located at the same side of the rotation center of the link 360, so that the structure is more compact and the reversing reliability is more easily ensured.

According to some embodiments of the invention, the first valve spool 320 moves from the first position to the second position under the hydrostatic pressure of water. Thus, when the first water outlet 302 is disconnected from the water storage container 100, the pressure of the water in the valve body 310 is rapidly increased from dynamic pressure to static pressure, the increased water pressure pushes the first valve body 320 to move, and then the first valve body 320 links the second valve body 330 to switch the reversing valve 300 to the reversing state. Therefore, the reversing valve 300 changes the direction of the waterway by utilizing the pressure change of the water, and the reversing valve 300 does not need external electricity or gas, so that the reversing valve is simpler in structure and higher in reliability, and is particularly suitable for household tap water with the water pressure in the range of 0.1-1 MPa.

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

Thus, when the reversing valve 300 is in the initial state, the first valve core 320 is pressed against the inner side of the valve body 310 under the action of the first elastic member 371, and the second valve core 330 is pressed against the one end of the water outlet connector 350 under the action of the second elastic member 372 to block the second water outlet 303; when water flows into the water inlet joint 340, both the pressure of the water and the force of the second elastic member 372 act on the head of the second valve cartridge 330 so that the head of the second valve cartridge 330 blocks the one 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 container 100 is disconnected from the first water outlet 302, the pressure inside the valve body 310 increases as the dynamic pressure becomes static pressure, when [ (P) ₁ *S ₁ -F ₁ -f ₁ )*1.4]>(P ₂ *S ₂ +F ₂ +f ₂ ) When the first valve element 320 pushes the connecting rod 360, the connecting rod 360 drives the second valve element 330 to move, and the reversing valve 300 is switched to the reversing state. Wherein P is ₁ The static pressure S applied to the head of the first valve element 320 ₁ F is the force-bearing area of the head of the first valve element 320 ₁ Is a first bulletForce of sex member 371, f ₁ Is the friction force, P, applied by the first valve element 320 ₂ The static pressure S applied to the head of the second spool 330 ₂ Is the force bearing area of the head of the second valve element 330, F ₂ Is the force of the second elastic member 372, f ₂ The friction force applied to the second spool 330 is the value 1.4, which is the pressure ratio generated by the lever principle of the connecting rod 360.

When the head of the second valve element 330 opens the water outlet connector 350, 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 exerted by the first valve element 320 is reduced again, and the thrust force is pressed back to the first position by the first elastic element 371; after the water outlet connector 350 is opened by the second valve element 330, the force bearing area of the left side of the head of the second valve element 330 is larger than the force bearing area of the right side, so that the second valve element 330 continues to move rightward until the special-shaped sealing ring seals the waterway between the water inlet 301 and the first water outlet 302 under the action of water pressure, and the reversing action is completed.

After closing the water, the second valve element 330 returns to the initial position under the elastic force of the second elastic element 372, and waits for the next boiled water use.

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

As shown in fig. 1 to 26, a water mixing device 10 for a water heater according to an embodiment of a second aspect of the present invention includes: the water storage container 100, the water absorbing device 200, and the reversing valve 300 according to the embodiment of the first aspect of the present invention.

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 glycol terephthalate, polyethylene terephthalate)) member, the water storage container 100 having a water storage inlet and a water supply outlet, the volume of the water storage container 100 not exceeding 15L.

The water absorbing device 200 is provided with a jet inlet 201, a jet outlet 202 and a venturi flow channel 203 which are respectively communicated with the jet inlet 201 and the jet outlet 202, the jet outlet 202 is suitable for being connected with the shower head 30 of the water heater, a water absorbing mouth 204 is arranged at the joint of the jet inlet 201 and the venturi flow channel 203, and the water absorbing mouth 204 is communicated with a water supply outlet so as to supply water to the venturi flow channel 203. It will be understood that the venturi flow channel 203 refers to a flow channel designed according to the venturi principle, that is, water entering through the jet inlet 201 generates negative pressure when flowing through the venturi flow channel 203, and the negative pressure is transferred to the water suction port 204, so that the water suction port 204 generates a water suction effect.

The operation of the water 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 from the first water outlet 302 and 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;

when the water storage inlet of the water storage container 100 is disconnected from the first water outlet 302, the reversing valve 300 changes the direction of the water path, and water from the water inlet 301 flows out from the second water outlet 303 and enters the jet inlet 201;

in the case of water flow, the water absorbing device 200 generates negative pressure through the venturi flow channel 203 inside, the water is absorbed from the water supply outlet of the water storage container 100 through the water absorbing port 204, and the absorbed water and the hot water flowing out of the water heater are mixed and flow into the shower 30 together, namely, the shower 30 discharges water, and meanwhile, the shower is prompted to be able to take a bath;

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

According to the water mixing device 10 for a water heater of the embodiment of the invention, cold water (usually, water with the temperature lower than 30 ℃ is cold water) is collected by the water storage container 100, when the hot water reaches a water consumption point, the 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 suction device 200 for use, so that a 'zero cold water' function can be realized without establishing a circulation loop, namely, no cold water flows out of the shower head 30 when a user opens the water mixing valve or uses water after the water valve 20, and the purpose of saving water and protecting the environment is achieved.

Therefore, the water mixing device 10 for the water heater does not need a water pump and components matched with the water pump, and has optimal cost; the user with or without the water return pipe does not need to use an H valve to construct a loop, so that the structure is simple, and the installation procedure is few; because no water path is circulated, the situation that a cold water pipe is mixed with hot water and other water treatment equipment is damaged is avoided, and the safety and the reliability are high; the condition that the pipelines except the hot water pipeline are heated is avoided, so that the gas and energy are saved; the water outlet flow is normal water flow because no water way is circulated, and the minimum temperature rise of the water heater is not particularly required; the water mixing device 10 can be used in the case of pipeline aging as long as the water pressure and the flow are in the normal range, and has strong applicability.

It should be understood that the water sucking device 200 and the reversing valve 300 may be provided inside the water storage container 100 or may be provided outside the water storage container 100, and the present invention is not limited thereto. Advantageously, the water absorbing means 200 are provided outside the water storage container 100 so as to be conveniently connected to the sprinkler 30; the reversing valve 300 is provided in the water storage container 100, so that the water mixing device 10 is compact in structure and good in integrity.

According to some embodiments of the present invention, as shown in fig. 1, 2 and 17-26, the water mixing device 10 for a water heater further includes a water level detection device 500, where 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 may be set according to the amount of cold water required by different users), so as to achieve selective on-off of the first water outlet 302 from the water storage container 100.

In some embodiments of the present invention, as shown in fig. 1, 2, and 17-26, the water level detection device 500 is switchable between a water inlet state and a cut-off state and includes: a water box, a float 520, a water level control 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 has an open mouth 511 and a drain opening 512, the open mouth 511 being located above the drain opening 512, for example, a top wall of the water box is open to form the open mouth 511. The float 520 is floatably provided in the water box. A water level control 530 is provided at the water outlet 512, and the water level control 530 is configured to control water to enter the water box from the open mouth 511 and to drain the water box from the water outlet 512. The water inlet control component is arranged on the water box. 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 being in communication with the control port 503.

22-25, in the water inlet state, the float 520 opens the control port 503 and the water inlet control assembly is communicated 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 detecting device 500 is switched to a cut-off state as shown in fig. 26, the float 520 floats up to close the control port 503 by buoyancy, and the water inlet control assembly disconnects the inlet 501 and the outlet 502, thereby stopping water inflow into the water storage container 100.

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

Therefore, the water level detection device 500 can reliably cut off the waterway when the water level reaches the preset high water level, so that after a user opens the water mixing valve or the water valve 20 of the water heater, the water storage container 100 collects cold water which flows out first, and when the collected cold water reaches the set water level (namely the preset high water level), the water inlet to the water storage container 100 can be stopped to supply hot water to the shower head 30, thereby being beneficial to realizing the zero cold water function of the water heater, and having simple structure and low cost.

According to some embodiments of the present invention, as shown in fig. 17 and 18, the water level detection apparatus 500 further includes: the water level adjusting member 540, the water level adjusting member 540 is installed in the water storage container 100, the water box 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 to convert the rotation motion of the water box into the lifting motion of the water box, and the adjusting operation groove 541 is arranged at the top end of the water level adjusting member 540. Therefore, the height of the water box can be conveniently adjusted without detaching the water box, and the structure for positioning the water box is not needed, so that the height of the preset high water level can be conveniently adjusted, the structure is very simple, and the number of parts is very small.

For example, the water tank is provided with a threaded hole 513, the water level adjusting member 540 is a screw, the screw 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 tank can be quickly adjusted by using a tool such as a screwdriver to rotate, 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 collar 101 for positioning the screw, which is hung in the water storage container 100 by the fixing collar 101.

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

Specifically, in the water intake state, the elastic control member 550 is in an undeformed original state, and water from the inlet 501 flows into the water storage container 100 through the outlet 502 while flowing into the water storage container 100 through the water gap 504 from the control port 503; in the cut-off state, since the control opening 503 is closed, the pressure in the water inlet cavity increases, the elastic control member 550 will deform downward under the action of the water pressure and finally prop against the water inlet body, at this time, the elastic control member 550 blocks the inlet 501, and the function of cutting off the waterway is achieved. Therefore, an external circuit is not needed, and the structure is very simple.

Further, as shown in fig. 19 to 26, the water intake body includes: a water inlet seat 560 and an upper cover 570. The water inlet seat 560 is provided in the housing cavity 514 formed on the side wall of the water box, and the inlet 501 and the outlet 502 are provided on the water inlet seat 560. The upper cover 570 is detachably mounted on the water inlet seat 560, for example, a plurality of protrusions 571 are disposed on the upper cover 570 at intervals along the circumferential direction of the upper cover 570, a plurality of buckling positions 561 are disposed on the water inlet seat 560 at intervals along the circumferential direction of the upper cover, the plurality of protrusions 571 are in one-to-one correspondence with the plurality of buckling positions 561, and each protrusion 571 is matched in the corresponding buckling position 561. Wherein a plurality of tabs 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 located 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 clamping groove, the rubber pad is assembled in the clamping groove, 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 post 572, a portion of the elastic control member 550 corresponding to the position of the inlet 501 is sleeved on the guide post 572, and a water passing gap 504 is defined between the portion of the elastic control member 550 and the guide post 572. In this manner, the resilient control 550 may be reliably pressed against the inlet 501 under the guidance of the guide post 572.

In some embodiments of the present invention, as shown in fig. 22 and 23, the plurality of outlets 502 are arranged at intervals along the circumferential direction of the inlet 501, and a supporting rib 562 is defined between two adjacent outlets 502, and in the cut-off state, the elastic control member 550 abuts against the supporting rib 562, so that not only the water flow is smooth in water inlet, but also the tightness in water channel cut-off can be ensured.

According to some embodiments of the present invention, as shown in fig. 24 to 26, the float 520 is exposed from the opening 511, and a rocker 580 is provided between the float 520 and the upper cover 570, the rocker 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 opening 503. For example, the upper cover 570 is provided with a mounting bracket 573, and one end of the rocker arm 580 connected to the upper cover 570 is mounted on the mounting bracket 573.

Advantageously, as shown in fig. 21 and 24 to 26, the rocker 580 is provided with a gasket 12, and the gasket 12 seals the control port 503 in the closed state, so that the sealing performance is good, and the vibration reduction can be also buffered. It will be appreciated that, to further simplify the construction, the portion of the rocker 580 that is connected to the float 520 is on the same side of the portion of the rocker 580 that is connected to the upper cover 570 that is used to block the control port 503.

Alternatively, as shown in fig. 19, the end of the rocker 580 connected to the float 520 is provided with a malfunction adjustment structure 581, and after the user turns off the water by mistake during the water use, the malfunction adjustment structure 581 lifts the rocker 580 to close the control port 503, thereby preventing water from being supplied into 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, and the notch is connected with a pull wire to the outside of the water storage container 100, so that the pull wire can be manually pulled to stop the waterway.

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 box, the water level control 530 is provided on the water box to be movable up and down, and the water level control 530 is constructed as a hollow member with 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 under the self-gravity and opens the water discharge opening 512; when water in the water storage container 100 passes through the water level control member 530, air inside the water level control member 530 floats up the water level control member 530 and is pushed up against the bottom of the water box, so that the water level control member 530 closes the water outlet 512 so that water does not enter the water box from the water outlet 512. For example, the top wall of the water level control member 530 is provided with a plurality of hooks 531 spaced apart 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 hooks on the water box under the self-gravity.

In some embodiments of the present invention, the water box, the float 520, the water level control 530, the rocker 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, thereby being more cost-effective. Wherein the float 520 may be constructed as a hollow member so as to be easily floated and simply constructed.

The operation of the water level detecting apparatus 500 according to one 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 box, the float 520 falls to the bottom of the water box under the action of gravity, and the float 520 pulls the rocker 580 so that one end of the rocker 580 connected to the upper cover 570 is lifted up, thereby opening the control port 503 at the top of the upper cover 570; meanwhile, the water level control member 530 at the lower portion of the water box is hooked on the water box under the action of 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 opening 512.

As shown in fig. 22 to 25, the water level detecting means 500 is in a water-in state, and when water flows in from the inlet 501, water flows out through the outlet 502 and then into the water storage container 100; at the same time, 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 water entering the water storage container 100 slowly increases, the level of the water gradually increases. When the liquid level overflows 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 pushed up to the bottom of the water box so that water does not enter the water box from the water outlet 512, as shown in fig. 25;

when the liquid level rises to the top of the water box, water rapidly flows in from the opening 511 at the top of the water box, so that the liquid level in the water box rises, the float 520 floats under the action of buoyancy, the rocker 580 connected with the float 520 is jacked up, and the control opening 503 is covered by the sealing gasket 12 arranged at one end of the rocker 580 connected with the upper cover 570; as the control port 503 is sealed, the pressure between the upper cover 570 and the elastic control member 550 increases, the elastic control member 550 is deformed downwardly 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 blocking the waterway as shown in fig. 26.

The water in the water storage container 100 can be discharged through the water supply outlet, when the water storage container 100 is drained, the water level control member 530 at the bottom of the water box can fall back to the hooked state when the liquid level is lower than the water level control member 530, as shown in fig. 26, at this time, the water in the water box can flow out from the gap between the water level control member 530 and the water box, and the water level detection device 500 is reset to the water inlet 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 flow path 203 includes a constricted flow path 211, a mixed flow path 212, and an expanded flow path 213 connected in this order in a direction from the jet inlet 201 to the jet outlet 202, the flow area of the constricted flow path 211 decreases in the direction from the jet inlet 201 to the jet outlet 202 and the flow area of the expanded flow path 213 increases in the direction from the jet inlet 201 to the jet outlet 202, and a water suction port 204 is provided at the junction of the jet inlet 201 and the constricted flow path 211.

In this way, when the water flows through the contraction flow passage 211 at a high speed, a entrainment effect is generated, and a negative pressure is generated in the area, and the negative pressure is transferred 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 outlet 202 through the expansion flow passage 213. The mixing channel 212 and the expanding channel 213 provide sufficient space to mix and expand, so as to ensure the pressure (i.e. pressure resistance) of the jet outlet 202, and avoid backflow of water back to the water suction port 204 when the external end of the jet outlet 202 has resistance. Therefore, the water absorbing device 200 generates better negative pressure in the pipeline resistance range of the shower head 30 and the shower head 30, ensures the water absorbing 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 path 211 gradually decreases, and the longitudinal cross-sectional profile of the constricted flow path 211 is configured in an arc shape protruding toward the central axis; the flow area of the expanding flow passage 213 is gradually increased, and the expanding 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 constricted flow path 211, and the flow area of the jet outlet 202 is larger than the maximum flow area of the expanded 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 flow path 203 are provided in the pipe body 210, respectively. The nozzle 220 is mounted to the pipe body 210, and a sealing member 11, such as an O-ring, may be provided between the nozzle 220 and the pipe body 210 to enhance sealability. The nozzle 220 communicates with the jet inlet 201, and the nozzle 220 has a jet flow passage 221 having a flow area decreasing in a direction from the jet inlet 201 to the jet outlet 202.

Due to the tapering effect of the injection flow passage 221, the water flow is accelerated by the water pressure as it flows 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 passage 221 is gradually reduced, and the injection flow passage 221 is configured in a truncated cone shape. Advantageously, the minimum diameter of the injection runner 221 is less than 4mm, so that the injection speed is faster and the injection range is further.

It will be appreciated that as shown in fig. 5, the water absorbing device 200 may be installed at the front end of the shower head 30, the water outlet end of the pipe body 210 is provided with internal threads to be connected with the shower head 30, and the water inlet end of the nozzle 220 is provided with external threads to be connected with the water pipe; alternatively, as shown in fig. 6, the water absorbing device 200 may be installed at the second water outlet 303 of the reversing valve 300, the water outlet end of the pipe body 210 is provided with internal threads to be connected with the shower 30, and the water inlet end of the nozzle 220 is provided with a flange structure to be connected with the reversing valve 300; or, the water absorbing device 200 is installed between the shower 30 and the reversing valve 300, and the water absorbing device 200 is connected with the shower 30 and the reversing valve 300 through water pipes respectively; of course, the water absorbing device 200 may also be built into the shower 30.

Wherein the tube body 210 may be a copper piece, PPS (polyphenylene sulfide,polyphenylene sulfide) Fiberglass pieces, ABS (Acrylonitrile Butadiene Styrene ), PET (polyethylene glycol terephthalate, polyethylene terephthalate), POM (polyoxymethylene) or PP (Polypropylene) pieces. The nozzle 220 may be a copper piece, PPS (polyphenylene sulfide,polyphenylene sulfide Ethers) Glass fibre-adding piece, ABS (Acrylonitrile Butadiene Styrene ), PET (polyethylene glycol terephthalat e, polyethylene terephthalate), POM (polyoxymethylene) or PP (Polypropylene) parts.

According to some embodiments of the present invention, as shown in fig. 3, 5 and 6, the central axis of the water suction port 204 is inclined with respect to the central axis of the venturi flow channel 203, thereby facilitating reduction of disturbance to water flow and reduction of loss.

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

According to some embodiments of the present invention, as shown in fig. 3, the outlet 502 of the injection flow channel 221 is disposed toward the constricted flow channel 211 and adjacent to the water suction port 204. Thus, the fluid loss is reduced, and the water mixing effect is ensured. Advantageously, the outlet 502 of the injection flow channel 221 is directly opposite to the constricted flow channel 211 in the axial direction of the tube body 210 and directly opposite to 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 constricted flow path 211, the diameter of the mixing flow path 212, and the minimum diameter of the diverging flow path 213 are d. That is, the flow area of the mixing flow passage 212 is constant in the direction from the jet inlet 201 to the jet outlet 202, thereby producing a good negative pressure and pressure resistance effect.

Alternatively, the ratio of the maximum diameter to the minimum diameter of the constricted flow path 211 is 2 to 2.5, and the ratio of the maximum diameter to the minimum diameter of the expanded flow path 213 is 1.5 to 2; the expansion angle of the expansion runner 213 is 3 ° -5 °; the length of the convergent flow path 211 is 1d-3d, the length of the mixing flow path 212 is 1d-3d, and the length of the divergent flow path 213 is 2d-5d. In this way, the water absorbing device 200 can be optimized with a comprehensive consideration of fluid loss, pressure resistance, negative pressure strength, water absorbing effect, and flow rate.

According to some embodiments of the present invention, as shown in fig. 3, the central axis of the venturi flow channel 203, the central axis of the pipe body 210 and the central axis of the injection flow channel 221 are coincident, so that the structure is simpler, the water absorbing effect and the fluid loss are better.

Since the water suction port 204 of the water suction device 200 generates a large noise when the air flows in, the water mixing device 10 for a water heater further includes a shut-off device 400 for detecting whether no water is supplied to the water 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 port 402, the communication port 401 communicates with the inner space of the water storage container 100, the water supply port 402 communicates with the water supply outlet, and the shut-off device 400 is 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.

In order to ensure that the water flow used by the user is not excessively affected by the anhydrous suction, further, as shown in fig. 1 and 12-16, the shut-off device 400 is further provided with a water replenishment interface 403, and the water replenishment interface 403 is communicated with the second water outlet 303. The shut-off device 400 is configured to be switchable between a water replenishment state as shown in fig. 13 and 14 and a water supply state as shown in fig. 15 and 16, the shut-off device 400 blocks the communication port 401 and communicates the water supply port 402 and the water replenishment port 403 in the water replenishment state, and the shut-off device 400 blocks the water replenishment port 403 and opens the communication port 401 to communicate the water supply port 402 and the communication port 401 in the water supply state, so that when the water storage container 100 is not supplied with the water suction port 204, the water suction port 204 can suck hot water from the second water outlet 303 to replenish the shower 30, increase the water flow rate of the shower 30, and ensure the bathing experience. Advantageously, the refill socket 403 communicates with the second outlet 303 through a waterway having a diameter of not more than 3 mm.

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 provided on the base 410 between the water replenishing position and the water supplying position, the shut-off device 400 is switched to the water replenishing state when the floating assembly falls to the water replenishing position under the action of self gravity, and the shut-off device 400 is switched to the water supplying state when the floating assembly floats to the water supplying position under the action of buoyancy of water.

Thus, the shut-off device 400 can ensure that the water in the water storage container 100 flows to the water suction port 204 preferentially when the water storage container 100 has the water supply water suction port 204, and can supply the water from the second water outlet 303 to the water suction port 204 through the water supplementing connector 403 when the water storage container 100 does not have the water supply water suction port 204, and ensure that the continuous water flows out from the water supply outlet, so that the shut-off device 400 realizes the preferential water supply and continuous water outlet of the water storage container 100 by utilizing the buoyancy and the gravity, is beneficial to realizing the zero cold water function of the water heater, and has simple structure and high reliability.

It should be understood that in the description of the present invention, the water-free supply of the water storage container 100 includes both the complete absence of water in the water storage container 100 and the residual portion of water in the water storage container 100.

Further, as shown in fig. 12-16, the floating assembly includes: a float ball 420 and a piston 430. It is understood that the float ball 420 is a sealing ball filled with gas, and the float ball 420 is provided at the communication port 401 to be floated up and down to open and close the communication port 401. For example, a stop seal 404 may be disposed at the communication port 401 to enhance the sealing between the base 410 and the float 420. The piston 430 is movably disposed in the base 410, and the piston 430 is connected to the floating ball 420, and the piston 430 moves up and down under the driving of the floating ball 420. The piston 430 communicates with the refill port 403 and the water supply port 402 when the float assembly is in the refill position, and the piston 430 blocks the refill port 403 when the float 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 passing hole 431, a water passing channel 432 communicating the water passing hole 431 with the water supply port 402, and a shielding portion 433, and the water passing hole 431 communicates with the water supply port 403 when the float assembly is in the water supply position, and the shielding portion 433 shields the water supply port 403 when the float assembly is in the water supply position.

Thus, when the water storage container 100 is not supplied to the water suction port 204, the float ball 420 falls on the stop seal ring 404 under the action of gravity, so that the seal base 410 and the internal space of the water storage container 100 are sealed at the water supplementing position shown in fig. 13 and 14, at this time, the water passing hole 431, the water passing channel 432 and the water supplementing port 403 on the piston 430 to which the float ball 420 is connected are communicated, and the water passing hole 431 and the water passing channel 432 are further communicated with the water supplying port 402, so that when the water supplementing port 403 is supplied with water, the stop device 400 is in the water supplementing state, and the water flow path is shown by the arrows in fig. 13 and 14.

When water is introduced into the water storage container 100, the liquid level gradually rises, as shown in fig. 15 and 16, the floating ball 420 floats under the buoyancy force, and at the same time, the piston 430 connected with the floating ball 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 up by the floating ball 420 shields the water supply port 403 at this time, thus having the function of intercepting, only a small amount of water can flow from the water supply port 403, ensuring that the water stored in the water storage container 100 flows out of the water supply port 402 preferentially, and the stop device 400 is in the water supply state at this time, and the water flow path is shown by the arrows in fig. 15 and 16.

When the water level in the water storage container 100 drops to the height of the shut-off seal ring 404, the floating ball 420 will block the upper part of the base 410 again with the drop of the liquid level, close the channel, and the shut-off device 400 will switch to the water-replenishing state.

In some embodiments of the present invention, as shown in fig. 12 to 16, the water passing holes 431 are plural, and the plural water passing holes 431 are spaced apart along the circumference of the piston 430, and each water passing hole 431 is configured as an elongated shape extending along the axial direction of the piston 430, so that the water flow can be ensured to be unobstructed.

Advantageously, as shown in fig. 12 to 16, the water passing hole 431 is located above the shielding part 433, and the water passing passage 432 penetrates the shielding part 433 in the axial direction of the piston 430. In this way, the blocking portion 433 faces the water supply port 403 after the piston 430 moves upward, so that the blocking effect is good, and water is facilitated to 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 supply port 403, and the water supply port 403 is located above the water supply port 402, so that the structure is compact, the space utilization 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 water replenishment port 403, and the central axis of the water supply port 402 are disposed 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 replenishment port 403 and the central axis of the water supply port 402 are both in the horizontal direction, and the central axis of the water replenishment port 403 is perpendicular to the central axis of the water supply port 402. Thus, the smooth flow of water is facilitated, and the water path arrangement is simpler.

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 being separated from the base 410, and the stopper 400 abuts against the base 410 in a water supply state, thereby limiting the floating ball 420.

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

It can be understood that the reversing valve 300 may also be an electromagnetic reversing valve 300, a motor driving rocker 580, a motor driving screw, or other electric reversing valve 300, so long as the reversing function can be ensured; the stop device 400 may also be an electromagnetic water valve, so long as the anhydrous stop function can be ensured to be realized; the water level detection device 500 may also be a structure of electronic liquid level detection matched with an electromagnetic switch valve. The present invention is not particularly limited in this regard.

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

when the liquid level gradually rises to a preset high water level of the water level detecting device 500, the float 520 of the water level detecting device 500 floats, and the outlet 502 is closed by the internal connection structure thereof, so that the water pressures of the water level detecting device 500 and the reversing valve 300 rapidly rise;

the rising water pressure pushes the first valve core 320 of the reversing valve 300 to move, and 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 from the second water outlet 303 and enters the nozzle 220 of the water absorbing device 200;

in the bathing process, the water level of the water in the water storage container 100 gradually drops, when the liquid level reaches a preset low water level, the floating ball 420 in the stop device 400 drops and blocks the communication port 401, the piston 430 is communicated with the water supplementing port 403 and the water supplying port 402, and the water sucking port 204 sucks water flowing out from the second water outlet 303;

After the bath is finished, the water mixing valve or the water valve 20 is closed, the reversing valve 300 is reset under the action of the spring force (i.e. is switched to an initial state), the reversing valve 300 becomes a water outlet state of the first water outlet 302, and the water level detection device 500 is also automatically reset (i.e. is switched to a water supplementing state) after the liquid level is lowered, so that the next use is waited.

In the above process, when the bath temperature (i.e. the water outlet temperature of the shower head 30) is set at 40 ℃, the water pressure is 0.2MPa, the flow of the water mixing valve or the water valve 20 is 6L/min, the water absorption flow is 1.0L/min, and after the cold water sucked by the water absorption port 204 is mixed with the hot water, the following mixing temperature is provided:

water absorption temperature	Temperature of mixed water
		5℃	35℃
10℃	35.7℃
		20℃	37.1℃
30℃	38.5℃

In the actual use process of the user, the water absorption temperature in winter is lower, so that the set bath temperature, such as 41 ℃ or 42 ℃, can be properly adjusted to ensure comfortable water consumption; the outlet water temperature can also be increased by reducing the flow of cold water drawn in, but is in line with the actual usage habits of the user and the stored cold water can be recycled in a bath cycle. When the water absorption temperature reaches 20 ℃ in spring, autumn and even summer, after the previously stored cold water is used for mixing water, the water mixing temperature can reach 37 ℃, and the condition that the bath can be directly performed is completely achieved.

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

According to the water mixing device 10 for the water heater, the problem of cold water outlet at the front end of a bath can be solved by directly connecting the water mixing device with a waterway system in series, so that a water mixing valve or a water valve 20 and a shower head 30 in the home of a user do not need to be modified.

The water heater according to the embodiment of the third aspect of the present invention comprises the water mixing device 10 for the water heater according to the embodiment of the second aspect of the present invention. For example, the water heater can be a gas water heater, an electric water heater, a wall-mounted boiler water heater, an air energy water heater and other water heaters with larger flow.

The water heater according to the embodiment of the invention has the function of zero cold water by utilizing the water mixing device 10 for the water heater, and has the advantages of simple structure, low cost, fewer installation procedures, safety, reliability, energy conservation, low use requirement and strong 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 should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

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

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

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

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

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

Claims

1. A diverter valve for a water heater, the diverter valve being switchable between an initial state and a diverter state and comprising:

the water mixing valve comprises a valve body, a water inlet, a first water outlet, a second water outlet, a first action cavity and a second action cavity, wherein the water inlet is suitable for being communicated with a water mixing valve or a water outlet of a water valve of the water heater, the first water outlet is suitable for being selectively communicated with a water storage container, and the second water outlet is suitable for being connected with a shower head of the water heater;

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,

when in the initial state, the first valve core is positioned at the first position, the second valve core is positioned 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 container, 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 is only communicated with the water inlet and the second water outlet, and the reversing valve is switched to the reversing state.

2. The diverter valve for a water heater as recited in claim 1, further comprising:

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

when in the initial state, the first valve core is propped against the connecting rod; when the first water outlet is disconnected from the water storage container, 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.

3. The diverter valve for a water heater as recited in claim 2, wherein in the diverting state, the first spool is separable from the linkage to move to the first position.

4. The reversing valve for a water heater according to claim 2, wherein the first valve cartridge and the second valve cartridge are located on the same side of a rotational center of the connecting rod.

5. The reversing valve for a water heater according to claim 2, wherein a central axis of the first spool is parallel to a central axis of the second spool, and a rotational central axis of the connecting rod is perpendicular to the central axis of the second spool.

6. The diverter valve for a water heater as recited in claim 1, wherein the first valve spool moves from the first position to the second position under hydrostatic pressure of water.

7. The reversing valve for a water heater of claim 1, wherein the first valve cartridge is provided with a first resilient member having a force that normally urges the first valve cartridge toward the first position.

8. The reversing valve for a water heater according to claim 1, wherein a second elastic member is provided on the second spool, the second elastic member having a force to normally urge the second spool toward the initial position.

9. The diverter valve for a water heater as recited in claim 1, wherein a central axis of the first spool coincides with a central axis of the first actuation chamber and a central axis of the second spool coincides with a central axis of the second actuation chamber.

10. The diverter valve for a water heater as recited in claim 1, further comprising:

and one end of the water inlet connector is connected with the water inlet, and the other end of the water inlet connector is suitable for being connected with the water outlet of the water mixing valve or the water valve.

11. The diverter valve for a water heater as recited in claim 1, further comprising:

the water outlet connector, one end of the water outlet connector is connected with the second water outlet, the other end of the water outlet connector is suitable for being connected with the water inlet end of the shower head, the second valve core is used for plugging one end of the water outlet connector when in the initial position, and the second valve core is used for opening one end of the water outlet connector when in the reversing position.

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

a water storage container having a water storage inlet and a water supply outlet;

the diverter valve for a water heater according to any one of claims 1-11, the first water outlet being in selective communication with the water storage inlet;

The water level detection device is used for disconnecting the first water outlet from the water storage inlet when the water level of water in the water storage container reaches a preset high water level.

13. A water heater comprising a water mixing device according to claim 12.