CN111237504B

CN111237504B - Thermostatic valve and water heater with thermostatic valve

Info

Publication number: CN111237504B
Application number: CN202010341096.3A
Authority: CN
Inventors: 肖卫军; 沈军才
Original assignee: Foshan Sundream Electronics Co ltd
Current assignee: Foshan Sundream Electronics Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-10-02
Anticipated expiration: 2040-04-27
Also published as: CN111237504A

Abstract

The invention discloses a thermostatic valve and a water heater with the thermostatic valve, wherein the thermostatic valve comprises a valve body, a valve core assembly and a driving motor, the valve body is provided with a cold water inlet, a cold water outlet, a hot water inlet and a thermostatic water outlet, a first partition plate is arranged in the valve body, a cold water cavity and a mixing cavity are respectively arranged on two sides of the first partition plate, a water through hole is formed in the first partition plate and used for communicating the mixing cavity with the cold water cavity, a water through channel is further formed in the valve body and used for communicating the cold water cavity with the cold water outlet, the valve core assembly comprises a rotating shaft, a valve core A and a valve core B, one end of the rotating shaft penetrates through a valve body sealing cover A to be in transmission connection with the driving motor, the other end of the rotating shaft is rotatably connected to the first partition plate, the valve core A is fixedly connected. The thermostatic valve provided by the invention has the advantages of compact structure and small height, can be arranged in a water heater, linearly controls the proportion of cold water and hot water, and improves the user experience.

Description

Thermostatic valve and water heater with thermostatic valve

Technical Field

The invention relates to the technical field of valves, in particular to a thermostatic valve and a water heater with the thermostatic valve.

Background

In order to obtain constant temperature water at a certain temperature, a conventional heat storage type water heater is generally provided with a thermostatic valve, one end of the thermostatic valve is connected with hot water, and the other end of the thermostatic valve is connected with cold water. The thermostatic valve is usually arranged between the water heater outer shell and the heating inner container, but the space distance between the outer shell and the heating inner container is very small, which requires that the structure of the thermostatic valve is as small as possible. There are also thermostatic valves placed under the housing, since the water heater is usually installed in the bathroom, which is limited in height, if once connected to the overhead shower, the thermostatic valve outlet is too low to be connected to the overhead shower. The structure of the existing thermostatic valve is that a cold water inlet and a hot water inlet, a valve core and a driving mechanism for adjusting proportion and a water mixing cavity are of an upper-middle-lower structure, the structure is compact, but the height is high, and the height of the water mixing cavity has to be shortened in order to reduce the height, so that the cold water and the hot water cannot be fully mixed, and the temperature of the obtained mixed water is not uniform and stable; on the other hand, in order to improve the accuracy of water temperature adjustment, a flow meter is usually arranged at the position of a constant-temperature water outlet of the conventional thermostatic valve, the conventional flow meter is usually a magnetic induction flow meter, high temperature affects magnetic induction, so that the flow error obtained by the flow meter is increased, and the driving motor of the thermostatic valve calculates the adjustment proportion through a temperature sensor and the flow meter, so that the adjustment of the proportion of cold water and hot water is not accurate enough on the basis of the error of the flow; on the other hand, when the valve core structure of the existing thermostatic valve is used for adjusting the flow proportion, the valve core structure cannot be linearly changed, the precision is low, and therefore the valve core structure is not sensitive enough to the adjustment of the temperature. It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a thermostatic valve and a water heater with the thermostatic valve, and aims to overcome the defects that the thermostatic valve body in the prior art is high in height and poor in adaptability, and a flow meter in a mixing valve is inaccurate in flow detection and not accurate in water temperature adjustment.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a thermostatic valve, includes valve body, case subassembly and driving motor, the valve body has cold water entry, cold water export, hot water entry, the export of thermostatic water, wherein, is equipped with first baffle in the valve body, first baffle both sides are cold water chamber and hybrid chamber respectively, are equipped with the water hole on the first baffle for intercommunication hybrid chamber and cold water chamber, still be equipped with water channel on the valve body for intercommunication cold water chamber and cold water export, the case subassembly includes rotation axis, case A and case B, rotation axis one end is passed valve body closing cap A and is connected with the driving motor transmission, and other end rotatable coupling is on first baffle, case A fixed connection corresponds the position in water hole at the rotation axis, case B fixed connection corresponds water channel's position at the rotation axis.

In the thermostatic valve, the thermostatic valve still includes the flowmeter, the flowmeter includes impeller and hall element, the impeller sets up in cold water entrance, the hall element corresponds the impeller and sets up on the valve body shell.

In the thermostatic valve, a boss is arranged at the position, facing to the valve core A, of the first partition plate, the table top of the boss is an inclined plane, the water passing hole penetrates through the boss, the valve core A comprises a first fan-shaped column, the cylindrical surface, corresponding to the water passing hole, of the first fan-shaped column is an inclined plane matched with the table top of the boss, a protruding block is arranged on the cylindrical surface, and the protruding block is matched with the water passing hole.

In the thermostatic valve, the first partition plate is provided with two bosses which are centrosymmetric and water through holes, and the valve core A is provided with two first fan-shaped columns at the positions corresponding to the bosses.

In the thermostatic valve, the valve core A comprises a first fan-shaped column, the cylindrical surface of the first fan-shaped column is attached to the first partition plate, and the area of the cylindrical surface of the fan-shaped column is larger than that of the water through hole.

In the thermostatic valve, the valve core B comprises a fan-shaped block and an arc-shaped convex block arranged on the side surface of the fan-shaped block, one end of the arc-shaped convex block is tangent to the fan-shaped block, the other end of the arc-shaped convex block is gradually raised, the water passing channel is a sunken groove which is arranged on the valve body and is raised inwards, and the size of the arc-shaped convex block is matched with the notch of the sunken groove.

In the thermostatic valve, still be equipped with the second baffle in the mixing chamber, the width of second baffle is the same with the diameter of mixing chamber, and the baffle is established near first baffle to the second baffle, is equipped with the via hole on the both sides of baffle.

In the thermostatic valve, a temperature sensor is also arranged at the thermostatic water outlet.

The utility model provides a take water heater of thermostatic valve, the water heater is heat storage formula water heater, the water heater is including heating inner bag, thermostatic valve and control element, the thermostatic valve includes as above the thermostatic valve, wherein, the cold water export of thermostatic valve is connected to the cold water entry of heating inner bag, and the hot water entry of thermostatic valve is connected to the hot water exit of heating inner bag, control element and thermostatic valve electric connection.

Has the advantages that:

the invention provides a thermostatic valve and a water heater with the thermostatic valve, which have the following beneficial effects: (1) the mixing cavity, the cold water cavity and the driving motor are horizontally coaxial with the rotating shaft, the structure is compact, the height is low, and the applicability of the thermostatic valve is improved; (2) the proportion of cold water and hot water in the thermostatic valve is adjusted by adjusting the proportion of cold water to cold water in the water heater and the mixing cavity, so that the thermostatic valve is simple to operate, high in precision and long in service life of the valve core; (3) the valve core A is of a structure with an inclined plane and a bump, the opening of the water passing channel can be linearly controlled, and the proportion of cold water and hot water in the mixing cavity of the thermostatic valve can be accurately adjusted; (4) the flowmeter that cold water entry set up, the flow that obtains the export of thermostatic water that can be accurate, the driving motor of being convenient for adjusts the hot and cold water proportion, improves temperature regulation's precision and speed, has improved the efficiency and the user experience of thermostatic valve.

Drawings

Fig. 1 is a front view of a thermostatic valve provided by the present invention;

FIG. 2 is a schematic structural view in cross section of a thermostatic valve;

FIG. 3 is a schematic cross-sectional view of a thermostatic valve with a stop in the second partition;

FIG. 4 is an exploded view of the first spool assembly and the first spacer;

FIG. 5 is an exploded view of the valve core assembly and the first spacer;

FIG. 6 is an exploded view of the valve core assembly and the first spacer;

FIG. 7 is a structural schematic view of the first partition plate in FIG. 6, which is opposite to the direction of the valve core A;

FIG. 8 is a schematic view of a second baffle plate provided with baffles;

fig. 9 is a schematic diagram of the connection of the heating inner container of the water heater and the thermostatic valve.

Detailed Description

The invention provides a thermostatic valve and a water heater with the thermostatic valve, and in order to make the purpose, the technical scheme and the effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, 2 and 3, the present invention provides a thermostatic valve, which includes a valve body 1, a valve core assembly disposed inside the valve body 1, and a driving motor 2 for driving the valve core assembly to rotate, wherein the valve body 1 is internally provided with a cylindrical cavity, two ends of the valve body are respectively provided with a sealing cover A3 and a sealing cover B4, the sealing cover A3 and the sealing cover B4 are detachably connected to the valve body, an upper end and a lower end of the valve body 1 are respectively provided with a hot water inlet 5, a cold water outlet 6, a cold water inlet 7 and a thermostatic water outlet 8, the cold water inlet 7 is connected to a cold water source through a pipeline, the cold water outlet 6 is connected to a cold water inlet of a heating liner of a water heater, the hot water inlet 5 is connected to a hot water outlet of the water heater, and the thermostatic water outlet 8 is connected to a use terminal, such as.

Specifically, as shown in fig. 2, 3, and 6, in the thermostatic valve with the above structure, a first partition plate 9 is arranged in the valve body 1, the first partition plate divides the internal cavity of the valve body into a cold water cavity 10 and a mixed water cavity 11, a water through hole 12 is arranged on the first partition plate 9, and the cold water cavity 10 is communicated with the mixed water cavity 11 through the water through hole 12. The upper end and the lower end of the cold water cavity 10 are respectively provided with a cold water outlet 6 and a cold water inlet 7, a water passing channel 13 is arranged on the valve body between the cold water cavity 10 and the cold water outlet 6, and the cold water cavity 10 is communicated with the cold water outlet 6 through the water passing channel 13. The upper side and the lower side of the mixing cavity 11 are provided with a hot water inlet 5 and a constant temperature water outlet 8. The valve core assembly comprises a rotating shaft 14, a valve core A15 and a valve core B16, wherein the rotating shaft 14 penetrates through the cold water cavity 10, one end of the rotating shaft penetrates through the valve body sealing cover A3 to be in transmission connection with the driving motor 2, the other end of the rotating shaft is rotatably connected onto the first partition plate 9, the valve core A15 is arranged at the position, corresponding to the water passing hole 12, of the rotating shaft and used for adjusting the opening degree of the water passing hole 12 to control the water quantity flowing into the mixing cavity 11 from the cold water cavity 10, and the valve core B16 is arranged at the position, corresponding to the water passing channel 13, of the rotating shaft 14 and used for adjusting the opening degree of the water passing channel.

During operation, the driving motor 2 drives the rotating shaft 14 to rotate, and simultaneously drives the valve core a15 and the valve core B16 to rotate, so as to simultaneously adjust the opening degrees of the water passing hole 12 and the water passing channel 13, it should be noted that the opening degrees of the two are adjusted in opposite directions, that is, when the opening degree of the water passing hole 12 is adjusted by the valve core a15 to increase, the opening degree of the water passing channel 13 is adjusted by the valve core B16 to decrease, and when the opening degree of the water passing hole 12 is adjusted by the valve core a15 to decrease, the opening degree of the water passing channel 13 is adjusted by the valve core B16 to. The opening of the water passing channel 13 is in direct proportion to the amount of hot water in the hot water inlet 5, namely, the amount of cold water at the cold water inlet of the water heater is equal to the amount of hot water at the hot water outlet of the water heater, so that the proportion of cold water and hot water in the mixing cavity 11 is controlled by adjusting the proportion of cold water to the mixing cavity, and the purpose of adjusting the water temperature is achieved.

The thermostatic valve with the structure is simple and compact in structure, and the mixing cavity 11, the cold water cavity 10 and the driving motor 2 are all horizontally coaxial with the rotating shaft 14, so that the integral height of the thermostatic valve is reduced, the occupied space is small, and the thermostatic valve can be placed in a water heater; simultaneously, this thermostatic valve regulation hot and cold water mixing ratio is realized through the proportion of adjusting cold water entering water heater and hybrid chamber to make the case subassembly can avoid contacting with hot water, prevent the case subassembly precision that causes because of the deposit of hot water incrustation scale from dropping, prolonged the life of case subassembly.

Specifically, as shown in fig. 2 and 3, the valve body 1 is further provided with a flow meter, the flow meter is used for measuring the flow of the thermostatic valve, and the obtained flow value is used as a basis for adjusting the proportion of cold water and hot water by the driving motor 2. The flowmeter comprises an impeller 17 and a Hall element 18, wherein the impeller 17 is arranged at the cold water inlet 7, the impeller 17 is inclined away from the water flow direction, the impeller can also be of a curved surface structure, and the Hall element 18 is arranged on a valve body shell corresponding to the impeller. During operation, the impeller 17 is driven by water flow to rotate, the rotating speed is different along with the different sizes of the water flow, and the Hall element 18 can sense the rotating number of turns of the impeller, so that the flow is measured.

The beneficial effect of arranging the flowmeter impeller 17 at the cold water inlet 7 of the thermostatic valve is that the flowmeter can accurately obtain the flow of the thermostatic valve. In the prior art, the total flow of thermostatic valve, must set up the flowmeter in thermostatic water outlet department, however thermostatic water outlet department temperature is higher, and high temperature can lead to the fact the influence to impeller 17 magnetism to high temperature deposits the incrustation scale easily, influences the flexibility of impeller, leads to the precision of flowmeter to descend. In the invention, because the water flow of the cold water inlet 7 of the thermostatic valve is the water flow of the thermostatic water outlet, the flow meter is arranged at the cold water inlet, the integral flow of the thermostatic valve can be obtained, and because the cold water inlet is low in temperature, the flow meter is not influenced by the temperature, the obtained flow numerical value is more accurate, and the driving motor 2 can more accurately control the proportion of cold water and hot water according to the flow.

Specifically, as shown in fig. 2 and 3, in the thermostatic valve with the above structure, a temperature sensor 19 is further disposed at the thermostatic water outlet 8, and the temperature sensor 19 is used for detecting the temperature at the thermostatic water outlet 8 and used as a basis for adjusting the ratio of cold water to hot water by the driving motor 2.

The constant temperature valve of above-mentioned structure, when driving motor 2 adjusted the hot and cold water proportion, promptly, when driving motor 2 adjusted water hole 12 and the 13 aperture sizes of water passageway, can adjust according to the temperature of constant temperature water outlet 8 department and the flow size of cold water inlet 7, consequently, more accurate as the judgement foundation than the single constant temperature water outlet temperature of referring to.

In one embodiment, as shown in fig. 4, a surface of the first partition plate 9 facing the valve core a15 is a plane, the valve core a15 is provided with a first fan-shaped column 15.1 corresponding to the water through hole, a cylindrical surface 15.2 of the first fan-shaped column 15.1 is attached to the first partition plate 9, the valve core B16 is provided with a second fan-shaped column 16.1, and an arc surface 16.2 of the second fan-shaped column 16.1 is attached to the water through channel, during operation, the rotating shaft 14 drives the valve core a15 and the valve core B16 to rotate, and simultaneously controls the opening adjustment of the cylindrical surface 15.2 of the first fan-shaped column 15.1 to the water through hole 12 and the opening adjustment of the arc surface 16.2 of the second fan-shaped column 16.1 of the valve core B16 to the water through channel 13, so as to adjust a ratio.

In another embodiment, as shown in fig. 5, 6, and 7, a boss 9.1 is provided at a position of the first partition plate 9 facing the valve core a15, the number of the bosses 9.1 may be two or one, the table surface 9.2 of the boss 9.1 is an inclined surface, the water through hole 12 passes through the center of the boss 9.1, the valve core a15 includes a first fan-shaped column 15.1, the number of the first fan-shaped column may be one or two, the first fan-shaped column 15.1 is arranged according to the number of the water through hole, the cylindrical surface of the first fan-shaped column 15.1 corresponding to the water through hole 12 is an inclined surface adapted to the table surface of the boss, a protrusion 15.3 is provided on the cylindrical surface, the shape of the protrusion 15.3 is adapted to the water through hole 12, and the protrusion 15.3 gradually protrudes from the cylindrical surface to form a protrusion 15.3. When the valve core A15 rotates until the cylindrical surface of the first fan-shaped column 15.1 is attached to the boss table surface of the first partition plate, the convex block 15.3 just completely extends into the water through hole 12, the convex block 15.3 not only blocks the water through hole 12, but also is abutted against the inner wall of the water through hole 12, so that the valve core A15 cannot rotate any more, the cold water cavity is isolated from the mixing cavity, all cold water in the cold water cavity flows into the water heater, all water flowing into the mixing cavity is hot water, and the temperature of the constant-temperature water outlet reaches the highest temperature; when the valve core A15 counter-rotation, the boss mesa of first fan-shaped post 15.1 cylinder and first baffle separates gradually, and the lug 15.3 also rotates out water hole 12 thereupon, and when the lug 15.3 did not shelter from the water hole completely, the aperture of passing the water hole was the biggest this moment, and the cold water proportion that flows into the hybrid chamber is the biggest, and the temperature of the constant temperature water exit is minimum this moment.

Preferably, as shown in fig. 5, 6, and 7, the first partition plate is provided with two bosses 9.1 which are symmetric about a rotation axis, and a projection area of the bosses on the first partition plate 9 is not greater than 1/4 of a cross-sectional area of the first partition plate 9, a table surface of the bosses is gradually inclined and protruded along the first partition plate, a water through hole 12 is provided at a center of the bosses, correspondingly, the valve core a15 includes two first fan-shaped columns 15.1 which are symmetric about the rotation axis, and a cylindrical surface of the first fan-shaped column 15.1 is inclined, an inclined angle is adapted to the table surface of the bosses 9.1, a projection area of the first fan-shaped column 15.1 on the first partition plate 9 is equal to a projection area of the bosses 9.1, the first fan-shaped column 15.1 is provided with a projection 15.3, a size of the projection is adapted to the water through hole, and the projection is a projection which is. As a variant, as shown in fig. 5, the valve core a comprises a circular disc, and the first sector-shaped column 15.1 and the projection 15.3 of the above structure are arranged on the circular disc. When the valve core A works, when the valve core A rotates until the cylindrical surface of the first fan-shaped column 15.1 is completely attached to the boss 9.1, the convex block 15.3 completely extends into the water through hole 12, the cold water cavity is completely isolated from the mixing cavity, at the moment, the first partition plate 9 is completely attached to the valve core A15 to form a cylindrical structure, the convex block 15.3 supports against the inner wall of the water through hole 12, and the rotating shaft cannot rotate any more; when the valve core a15 rotates reversely until the first partition plate 9 is completely separated from the valve core a15, at this time, the column shaft of the first fan-shaped column 15.1 abuts against the boss 9.1, and the rotation shaft is also limited to be incapable of rotating any more, so that the excessive rotation of the rotation shaft can be avoided, and the limiting effect is achieved.

Another beneficial effect of above-mentioned structure is that, lug 15.3 is for protruding in the lug of first fan-shaped cylinder 15.1 gradually, when the aperture of 12 in the water hole is crossed in control, has better linear effect, and the inclined plane of cooperation boss and first fan-shaped cylinder simultaneously can make the regulation of crossing the water hole aperture more accurate, and temperature control is more accurate.

Specifically, in the thermostatic valve with the above structure, the valve core a15 may be disposed on the rotating shaft located in the cold water cavity, so that the valve core a blocks the water hole along the water flow direction, and at this time, the resistance applied to the valve core a is small; the rotating shaft can penetrate through the first partition plate and partially extend into the mixing cavity, the valve core A is arranged at one end of the rotating shaft, which is located at the mixing cavity, and the opening degree of the water hole is adjusted in the reverse water direction.

Preferentially, in the thermostatic valve with the above structure, as shown in fig. 3, 5, and 6, the valve core B16 includes a sector block 16.3 and an arc-shaped protrusion 16.4 disposed on a side surface of the sector block, one end of the arc-shaped protrusion 16.4 is tangent to the sector block, the other end is gradually protruded, the water passing channel 13 is a sunken groove disposed on the valve body and protruding inwards, the size of the arc-shaped protrusion is matched with a notch of the sunken groove, and when the arc-shaped protrusion 16.4 rotates into the sunken groove, the notch of the sunken groove is just compact. The gradual change arc lug 16.4 that sets up on segment 16.3 can form the change of linear gradual opening when the adjustment crosses the flow area of water passageway 13 to can more accurate regulating pondage, and then more accurate quick adjustment thermostatted water export temperature, and, the structure of linear gradual opening, water flow resistance is minimum, thereby makes the moment of torsion that rotation axis 14 received minimum, prolongs the life of rotation axis 14.

In one embodiment, the mixing chamber is further provided with a second baffle 20, as shown in fig. 2 and 3, the second baffle 20 has a width equal to the inner diameter of the mixing chamber 11 and a length less than or equal to the length of the mixing chamber 11. When the length of the second partition board is less than that of the mixing cavity, as shown in fig. 2, one end of the second partition board 20 is fixed on a sealing cover B4 of the valve body located on the mixing cavity, and the other end extends into the mixing cavity 11 to divide the mixing cavity into an upper part 11.1 and a lower part 11.2 which are communicated, the upper part of the mixing cavity is communicated with a hot water inlet, the lower part is communicated with a constant temperature water outlet, and hot water enters the lower part from a gap between the second partition board and the first partition board through the upper part of the mixing cavity and is mixed with cold water. Through setting up second baffle 20, can avoid hot water not fully mixed just outflow from the constant temperature water export with cold water to the hot water drainage.

In another embodiment, as shown in fig. 3 and 8, the second partition 20 has a length equal to that of the mixing chamber, and is provided with an upward baffle 21 at a position close to the first partition 9, and the second partition is provided with through holes 22 at both sides of the baffle 21, the through holes 22 are used for communicating the upper part 11.1 and the lower part 11.2 of the mixing chamber and guiding hot water into the lower part 11.2 of the mixing chamber, and the baffle is used for blocking cold water from entering the upper part 11.1 of the mixing chamber and guiding cold water into the lower part 11.2 of the mixing chamber. The second baffle 20 serves to mix the hot and cold water thoroughly without increasing the height of the mixing chamber.

As shown in fig. 9, a take water heater of thermostatic valve, the water heater is heat storage water heater, the water heater includes heating inner bag 23, thermostatic valve and control element, the thermostatic valve adopts as above the thermostatic valve, the cold water entry linkage of heating inner bag is the cold water export of thermostatic valve, and the hot water exit linkage of heating inner bag is the hot water entry of thermostatic valve, control element and driving motor, flowmeter, temperature sensor and heating mechanism and the temperature-sensing mechanism electric connection in the heating inner bag.

The water heater of above-mentioned structure through the control entering heating inner bag and the cold water proportion in the hybrid chamber, realizes the proportion of the hot and cold water in the control hybrid chamber, reaches the mixed water that obtains constant temperature. The mixing chamber of the thermostatic valve of above-mentioned water heater, cold water chamber and actuating mechanism are located the same axis, the compact structure of thermostatic valve is exquisite, it is high little, can enough set up in the water heater, also can set up outside the water heater, can select according to product actual need, and because it is fill for the duty height little, strong adaptability can adapt to the little space of the interior hollow height in bathroom, and thermostatic valve case structure is the linear gradually-opened structure, enable the hot and cold water proportional control and be linear state, thereby the more accurate regulation temperature of ability has better user experience.

It should be noted that, the positions related to the interface in the present invention are all provided with a sealing gasket, including seals at two ends of the valve body, a cold water inlet, a cold water outlet, a hot water inlet, a constant temperature water outlet, etc., and as the sealing gasket is the prior art, no further description is provided herein; in addition, a single valve is arranged at a cold water outlet of the invention, and the single valve is the prior art and is not described in detail herein.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. A thermostatic valve comprises a valve body, a valve core assembly and a driving motor, wherein the valve body is provided with a cold water inlet, a cold water outlet, a hot water inlet and a thermostatic water outlet, and is characterized in that a first clapboard is arranged in the valve body, a cold water cavity and a mixing cavity are respectively arranged at two sides of the first clapboard, a water passing hole is arranged on the first clapboard and used for communicating the mixing cavity with the cold water cavity, a water passing channel is also arranged on the valve body and used for communicating the cold water cavity with the cold water outlet, the valve core assembly comprises a rotating shaft, a valve core A and a valve core B, one end of the rotating shaft penetrates through a valve body sealing cover A to be in transmission connection with the driving motor, the other end of the rotating shaft is rotatably connected onto the first clapboard, the valve core A is fixedly connected at the position of the rotating shaft corresponding to the water passing hole, the valve core B is fixedly connected at the position of, the mesa of boss inclines to be protruding gradually along first baffle, cross the water hole and run through and set up in the center of boss, case A includes two first fan-shaped posts that use the rotation axis as central symmetry, the cylinder slope of first fan-shaped post, the angle and the boss mesa adaptation of slope are equipped with the lug on the first fan-shaped post, the size and the water hole adaptation of crossing of lug to the lug is the lug of protrusion in the cylinder of first fan-shaped post gradually, first fan-shaped post reaches the projected area of boss on first baffle equals, just projected area is not more than first baffle cross sectional area's 1/4.

2. The thermostatic valve according to claim 1, further comprising a flow meter including an impeller disposed at the cold water inlet and a hall element disposed on the valve body housing in correspondence with the impeller.

3. The thermostat valve as claimed in claim 1, wherein the spool a includes a first sector-shaped pillar, a cylindrical surface of the first sector-shaped pillar is attached to the first partition, and an area of the cylindrical surface of the first sector-shaped pillar is larger than an area of the water through hole.

4. The thermostatic valve according to claim 1, wherein the valve core B comprises a sector and an arc-shaped projection arranged on the side surface of the sector, one end of the arc-shaped projection is tangent to the sector, the other end of the arc-shaped projection is gradually raised, the water passing channel is a sunken groove which is arranged on the valve body and is raised inwards, and the size of the arc-shaped projection is matched with the notch of the sunken groove.

5. The thermostatic valve according to claim 1 wherein a second baffle plate is provided within the mixing chamber, the second baffle plate having a width equal to the diameter of the mixing chamber, the second baffle plate having a baffle plate adjacent the first baffle plate and having a plurality of through holes on the second baffle plate on either side of the baffle plate.

6. Thermostat valve according to claim 1, characterized in that the thermostat water outlet is also provided with a temperature sensor.

7. A water heater with a thermostatic valve is a heat storage type water heater, the water heater comprises a heating inner container, a thermostatic valve and a control element, the thermostatic valve comprises the thermostatic valve as claimed in any one of claims 1 to 6, the cold water inlet of the heating inner container is connected with the cold water outlet of the thermostatic valve, the hot water outlet of the heating inner container is connected with the hot water inlet of the thermostatic valve, and the control element is electrically connected with the thermostatic valve.