CN210623676U - Water mixing center - Google Patents

Abstract

The utility model provides a water mixing center belongs to valve technical field. The temperature control device solves the problems of realizing diversified temperature regulation and ensuring safety under the condition of convenient user operation. The water mixing center comprises a water pipe I, a water pipe II, a water pump and a water mixing valve with a valve body, wherein the valve body is provided with a hot water port, a cold water port and a water outlet, the water outlet of the valve body is connected with the left end of the water pipe II, a bypass pipe is connected between the cold water port of the valve body and the upper side of the left end of the water pipe I, a core and a thermal bulb with a heated part at the upper end are arranged in the valve body, an adjusting head is in threaded connection with the upper end of the valve body, a stepping hole is formed in the center of the lower end face of the adjusting head, the heated part is located in the stepping hole, an annular convex shoulder is arranged on. This muddy water center has advantages such as convenience of customers uses.

Description

Water mixing center

Technical Field

The utility model belongs to the technical field of the valve, a mix water center is related to.

Background

With the development of science and technology, floor heating equipment has gradually popularized to every family. Wherein the ground heating equipment comprises a water mixing center. The water mixing device has the function that after high-temperature heating water supply enters a floor heating system, the high-temperature heating water supply is mixed with floor heating backwater with lower temperature after being cooled by a floor heating coil in the water mixing component. The water mixed with the proper temperature enters the water separator after passing through the booster pump, and then is subjected to heat dissipation and heating through the floor heating coil, wherein the booster pump is used for providing power for mixed water. The benefits of the water mixing center are: 1. the ground heating pipeline is protected, and ground cracking is prevented. 2. Protect the boiler, increase of service life. 3. The boiler energy efficiency is improved, and the fuel gas is saved. 4. And realizing chamber control. 5. The flow velocity of the heating water is increased, and the heat exchange efficiency is improved. 6. The flow is automatically adjusted, the return water temperature of the boiler is effectively improved, and a better energy-saving effect is achieved.

However, because the sensitivity degree of the users to the room temperature is different, the floor heating temperature occasionally needs to be adjusted according to the requirements of the users. The water mixing center on the existing market usually directly adjusts the set temperature to achieve the effect of adjusting the temperature, and although the water mixing center can also be adjusted like this, the operation is too single, and the requirement of temporarily or more conveniently adjusting the temperature cannot be met. Therefore, solving the existing problems makes the matters to be solved not easy at present.

Disclosure of Invention

The utility model aims at providing a to the above-mentioned problem that prior art exists, provide a mix water center. The technical problem to be solved is how to realize diversified temperature regulation and ensure safety under the condition of convenient operation of a user.

The purpose of the utility model can be realized by the following technical proposal:

the water mixing center comprises a water pipe I, a water pipe II, a water pump connected between the water pipe I and the water pipe II and a water mixing valve with a valve body, wherein the left end, the lower end and the right end of the valve body are respectively provided with a hot water port, a cold water port and a water outlet, the water outlet of the valve body is connected with the left end of the water pipe II, a bypass pipe is connected between the cold water port of the valve body and the upper side of the left end of the water pipe I, a core capable of controlling the proportion of cold water and hot water during movement and a temperature bulb with a heated part at the upper end are arranged in the valve body, and the heated part can extend when the temperature of outlet water is higher than a set value, the water mixing center is characterized in that the upper end of the valve body is in threaded connection with an adjusting head, a yielding hole is arranged in the center of the lower end face of the adjusting head, the heated part, the annular limiting groove is internally provided with a limiting clamp spring, and the inner edge of the limiting clamp spring extends out of the annular limiting groove and is positioned below the adjusting head.

The upper end of the valve body is in threaded connection with an adjusting head, a yielding hole is formed in the center of the lower end face of the adjusting head, the heated part is located in the yielding hole, an annular convex shoulder is arranged on the outer side of the middle of the thermal bulb, and the lower end face of the adjusting head abuts against the upper end face of the annular convex shoulder. The hole of stepping down can play the effect of a direction well, because the thermal bulb can change and stretch out and draw back according to the temperature, can carry out frequent up-and-down motion, the hole of stepping down can play the effect that prevents the thermal bulb skew, and the thermal bulb middle part is provided with annular convex shoulder moreover and can carry on spacingly to the thermal bulb effectively, has promoted the job stabilization nature of thermal bulb. The valve body is internally provided with a core which can control the proportion of cold water and hot water during movement and a thermal bulb of which the upper end is provided with a heated part, and the lower end surface of the annular convex shoulder is abutted against the upper end surface of the core. If the temperature of the water entering from the hot water port is higher than the set temperature, the heated part on the bulb can be extended to push the bulb downwards, so that the core can be downwards moved to reduce the hot water flux, and the cold water flux is increased, thereby achieving the effect of reducing the water temperature. The adjusting head also has the function of enabling a user to manually control and adjust the water temperature, the adjusting head is connected to the valve body through threads, so that the adjusting head only needs to be rotated, the heated part of the thermal bulb is arranged in the yielding hole, and the lower end face of the adjusting head abuts against the upper end face of the annular convex shoulder, so that the thermal bulb can also move downwards along with the adjusting head. The lower end face of the annular convex shoulder is abutted against the upper end face of the core, and the core moves downwards along with the annular convex shoulder, so that the hot water inlet amount is reduced, and the cold water inlet amount is increased. Otherwise, the operation of the rotary adjusting head can increase the entering amount of hot water and reduce the entering amount of cold water, so that the convenient and practical effects are achieved, the temperature setting of the water mixing center can be not changed, the actual water temperature can be adjusted according to the requirements of different users, and the use by the users is greatly facilitated.

An annular limiting groove is formed in the inner side of the upper end of the valve body, a limiting clamp spring is arranged in the annular limiting groove, and the inner edge of the limiting clamp spring extends out of the annular limiting groove and is located below the adjusting head. The limiting clamp spring is used for limiting the displacement distance of the adjusting head and preventing the adjusting head from moving excessively to enter the valve body to crush the temperature bulb or the core, so that a user can easily screw the adjusting head, the user does not need to worry about valve body damage caused by excessive force exertion or excessive screwing, and the safety is guaranteed while the user operation is facilitated.

In foretell muddy water center, adjust the head and include cylinder and protrusion in the spacing portion of cylinder lower extreme outer peripheral face, the valve body upper end is equipped with the valve opening, is equipped with the convex part of in-band screw thread in the upper port of valve opening, and the cylinder upper end stretches out outside the valve body and is fixed with the hand wheel, cylinder middle part and convex part threaded connection.

The adjusting head comprises a cylinder body and a limiting part protruding out of the outer peripheral face of the lower end of the cylinder body, the limiting part is used for being abutted against the limiting clamp spring to limit the adjusting head to excessively displace into the valve body, and safety is improved.

In the water mixing center, the upper side groove wall of the annular limiting groove is inclined upwards.

The upside cell wall tilt up of annular spacing groove, the benefit that sets up like this can make things convenient for spacing jump ring's assembly, and the upside cell wall that the slope set up can play the effect of a direction, more makes things convenient for the assembly.

In foretell muddy water center, the valve body inner wall has the annular boss one and the annular boss two that separate the valve body inner chamber from top to bottom for going out the water cavity, hot water cavity and cold water cavity in proper order, and the core is both ends opening cylindric and passes annular boss one and annular boss two's core, and the core up end offsets with going out the water cavity roof and leans on, and core upper end lateral part is equipped with a plurality of water gaps along circumference, and the core lateral part that is located two inboards of annular boss is equipped with the annular, and it has a plurality of inlet openings that run through the core lateral part to distribute along circumference in the annular, and the upper and lower port of annular boss two is the flaring respectively, and annular.

The inner wall of the valve body is provided with a first annular boss and a second annular boss which sequentially divide the inner cavity of the valve body into a water outlet cavity, a hot water cavity and a cold water cavity from top to bottom, hot water at a hot water port can enter the hot water cavity, cold water at a cold water port can enter the cold water cavity, and water at the hot water port and the cold water port is mixed in the water outlet cavity, so that the water temperature is reduced. And the side part of the core, which is positioned at the inner side of the second annular boss, is provided with an annular groove, and a plurality of water inlet holes penetrating through the side part of the core are distributed in the annular groove along the circumferential direction. Because the hot water cavity and the cold water cavity are arranged next to each other, the core can be driven by the thermal bulb to move towards the cold water cavity, and the annular groove is internally provided with a water inlet hole. The control of the size of the opening of the water inlet hole can be completed along with the displacement of the core. The temperature of mixed water is low, the core does not move downwards, and more openings of the water inlet hole on one side of the hot water cavity result in more hot water flux. When the temperature of mixed water is too high, the core moves downwards, the openings of the water inlet holes on one side of the cold water cavity are more, the cold water flux is increased, and the hot water flux is reduced, so that the aim of mixing water is fulfilled. The arrangement is simple and practical. The upper port and the lower port of the second annular boss are respectively in flaring shapes, the upper portion of the annular groove is located at the upper port of the second annular boss, and the flaring shapes are arranged to increase water flow flux, so that the use is not affected due to the fact that the total water flow amount is reduced due to narrow space.

In the water mixing center, the water inlet hole is an arc-shaped hole.

The setting of arc hole makes the inflow promoted, can not influence the user and use because inlet opening undersize. And the structure of the second annular boss is more attached to the arrangement of the arc-shaped hole, so that the control of the flow of cold and hot water is more accurate and convenient.

In the water mixing center, the inner side of the upper port of the core is fixedly connected with a plurality of convex pieces along the circumferential direction, and the lower part of the thermal bulb is inserted between the convex pieces.

The inner side of the upper port of the core is fixedly connected with a plurality of convex pieces along the circumferential direction, and the lower part of the thermal bulb is inserted between the convex pieces. Set up like this and make joint strength between bulb and the core obtain promoting, because core and bulb all can carry out the displacement, the bulb lower part sets up in the core upper end, sets up like this and makes connection structure more stable, avoids unexpected emergence to damage the valve body, causes the unnecessary loss.

In foretell muddy water center, be equipped with annular boss three between cold water mouth and the cold water chamber, the cold water intracavity is equipped with the flood peak, crosses flood peak lower extreme threaded connection in annular boss three, crosses the flood peak upper end and is located the core lower extreme, crosses the upper end outside of flood peak and is equipped with the sealing washer, crosses the flood peak lateral part and is equipped with a plurality of water holes of crossing that are linked together cold water chamber and cold water mouth along circumference.

The upper end of the overflow head is positioned in the lower end of the core, and the outer side of the upper end of the overflow head is provided with a sealing ring. The core can slide relative to the water passing head and the sealing ring can play a role in sealing the inner side surface of the core and the outer side surface of the upper end of the water passing head, so that cold water is prevented from entering the core through a gap between the inner side surface of the core and the outer side surface of the upper end of the water passing head.

In the water mixing center, the outer side of the water passing head is provided with an annular blocking surface which is abutted against the bottom wall of the cold water cavity.

An annular blocking surface is arranged outside the water passing head and abuts against the bottom wall of the cold water cavity. Be provided with two benefits like this, one of them is the excessive threaded connection of ability restriction water head stretches into in the cold water mouth, plays a spacing effect, can make things convenient for us to assemble the water head. Secondly the annular stop face supports against the passageway that can be fine reserved out and give rivers to pass through with the diapire in cold water chamber, prevents to shrink owing to the water hole of excessively assembling.

In the above water mixing center, a spring is arranged in the core, a cavity is arranged at the upper end of the water passing head, a right-angle notch is arranged on the inner side of the lower end of each protruding piece, the lower end of the spring is abutted against the bottom wall of the cavity, and the upper end of the spring is abutted against the top wall of each protruding piece at the right-angle notch.

The lower end of the spring is abutted against the bottom wall of the cavity, the upper end of the spring is abutted against the top wall of each protruding piece at the right-angle notch, and the elastic force of the spring acts on the protruding pieces to enable the core to always have the tendency of being abutted against the top wall of the water outlet cavity. The core can slide relative to the second annular boss to control the mixing of cold water and hot water, and the core is controlled to move downwards by the thermometer bulb, so that the core is required to be fixed initially, and the spring can limit the movement of the core, thereby improving the safety.

Compared with the prior art, the product has the advantages that: the lower end face of the adjusting head abuts against the upper end face of the annular convex shoulder, the lower end face of the annular convex shoulder abuts against the upper end face of the core, the water mixing proportion is manually controlled by rotating the adjusting head, the temperature setting of the water mixing center is not required to be changed, the actual water temperature is adjusted according to the requirements of different users, and the use of the users is greatly facilitated.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of a mixing valve;

FIG. 3 is a cross-sectional view of the body of the mixing valve;

FIG. 4 is a detail view of the core;

FIG. 5 is a cross-sectional view of the cartridge;

fig. 6 is a detail view of the flood head.

In the figure, 1, a water pipe I; 2. a water pipe II; 3. a water pump; 4. a valve body; 41. a hot water port; 42. a cold water port; 43. a water outlet; 44. an annular limiting groove; 45. a valve bore; 46. a first annular boss; 47. a second annular boss; 48. a third annular boss; 49. a convex portion; 5. a bypass pipe; 6. a core; 61. a water outlet gap; 62. a ring groove; 63. a water inlet hole; 64. a tab; 641. a right-angle notch; 7. a thermal bulb; 71. a heat receiving unit; 72. an annular shoulder; 8. an adjustment head; 81. a cylinder; 811. a hole of abdication; 812. a limiting part; 82. a hand wheel; 9. a limiting clamp spring; 10. a water head; 101. water passing holes; 102. an annular blocking surface; 103. a concave cavity; 11. a spring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the water mixing center includes a first water pipe 1, a second water pipe 2, a water pump 3 connected therebetween, and a water mixing valve having a valve body 4, wherein the left, lower and right ends of the valve body 4 are respectively provided with a hot water port 41, a cold water port 42 and a water outlet 43, the water outlet 43 of the valve body 4 is connected to the left end of the second water pipe 2, and a bypass pipe 5 is connected between the cold water port 42 of the valve body 4 and the upper side of the left end of the first water pipe 1. The hot water port 41 at the left end of the valve body 4 is connected with a boiler or a hot water pipeline, hot water is mixed with cold water flowing in through the cold water port 42 at the lower end of the valve body 4 to be cooled for the first time, then the hot water enters the water pipe II 2 through the water outlet 43, the right end of the water pipe II 2 is in butt joint with a water collector, the water pump 3 pumps the return water of the water collector and the hot water mixed for the first time to be mixed and pumped into the water pipe I1, a part of secondarily-mixed water in the water pipe I1 enters the cold water port 42 through the bypass pipe 5 to be cooled for the first time with the hot water, if the secondary-mixed water does not need to be mixed and cooled, the secondarily-mixed water is recycled through a recycling pipeline in butt joint with the left end of the water pipe I1, the right end of.

As shown in fig. 2-3, the inner wall of the valve body 4 has a first annular boss 46 and a second annular boss 47 which divide the inner cavity of the valve body 4 into a water outlet cavity, a hot water cavity and a cold water cavity from top to bottom, hot water at the hot water port 41 enters the hot water cavity, cold water at the cold water port 42 enters the cold water cavity, and water at the two cavities is mixed in the water outlet cavity to reduce the water temperature. The core 6 is cylindrical and penetrates through the first annular boss 46 and the second annular boss 47, the upper end face of the core 6 is abutted against the top wall of the water outlet cavity, a plurality of water outlet notches 61 are formed in the side portion of the upper end of the core 6 along the circumferential direction, and water flows into the water pipe 2 from the water outlet notches 61. And a ring groove 62 is arranged at the side part of the core 6 positioned at the inner side of the second annular boss 47, and a plurality of water inlet holes 63 penetrating through the side part of the core 6 are distributed in the ring groove 62 along the circumferential direction. The hot water cavity and the cold water cavity are arranged next to each other, the core 6 can slide up and down relative to the second annular boss 47, the water inlet hole 63 is formed in the annular groove 62, the water passing flux of the water inlet hole 63 is constant, and when the water passing flux is mixed, the water inlet hole 63 can simultaneously pass through the cold water cavity and the hot water cavity, so that the temperature of mixed water can be controlled according to the flow of cold water and hot water. The arrangement is such that displacement of the core 6 adjusts the size of the inlet opening 63 relative to the openings of the hot and cold water chambers to achieve the regulated temperature. The temperature of mixed water is low, the core 6 moves upwards, and the hot water flux is high when the number of the openings of the water inlet holes 63 on one side of the hot water cavity is large. When the temperature of mixed water is too high, the core 6 moves downwards, the openings of the water inlet holes 63 on one side of the cold water cavity are more, the cold water flux is increased, and the hot water flux is reduced, so that the aim of mixing water is fulfilled. The arrangement is simple and practical. The upper and lower ports of the second annular boss 47 are respectively in flaring shapes, the upper part of the annular groove 62 is positioned at the upper port of the second annular boss 47, and the flaring shapes are arranged to increase the water flow flux, so that the total water flow amount is not reduced due to narrow space to affect use. And inlet opening 63 also is the design of arc hole, sets up like this and makes the inflow promoted, can not influence the user and use because inlet opening 63 undersize. And the arc hole is arranged to be more fit with the structure of the second annular boss 47, so that the control of the cold and hot water flow is more accurate and convenient.

The upper end of the valve body 4 is provided with an adjusting head 8, the center of the lower end face of the adjusting head 8 is provided with a yielding hole 811, the heated part 71 is positioned in the yielding hole 811, the outer side of the middle part of the thermal bulb 7 is provided with an annular convex shoulder 72, and the lower end face of the adjusting head 8 abuts against the upper end face of the annular convex shoulder 72. Hole 811 stepping down can play the effect of a direction well, improves structural strength, because thermal bulb 7 can change and stretch out and draw back according to the temperature, can carry out frequent up-and-down motion, hole 811 stepping down can play the effect that prevents thermal bulb 7 skew, and thermal bulb 7 middle part is provided with the annular convex shoulder moreover and can be spacing thermal bulb 7 effectively, has promoted thermal bulb 7's job stabilization nature. A plurality of protruding pieces 64 are fixedly connected to the inner side of the upper port of the core 6 along the circumferential direction, the lower part of the thermal bulb 7 is inserted between the protruding pieces 64, and the lower end face of the annular protruding shoulder 72 abuts against the upper end face of the core 6. Set up like this and make joint strength between bulb 7 and the core 6 obtain promoting, because core 6 and bulb 7 all can carry out the displacement, bulb 7 lower part sets up in core 6 upper end, sets up like this and makes connection structure more stable, avoids unexpected emergence to damage valve body 4, causes the unnecessary loss. When the temperature of water entering from the hot water port 41 is higher than the set temperature, the heated part 71 on the thermal bulb 7 extends to push the thermal bulb 7 downwards, and the core 6 moves downwards along with the temperature, so that the hot water flux is reduced, and the cold water flux is increased, thereby achieving the effect of reducing the water temperature. The adjusting head 8 has the function of enabling a user to manually control and adjust the water temperature, the adjusting head 8 is in threaded connection with the valve body 4, only the adjusting head 8 needs to be rotated, and the thermal receiving part 71 of the thermal bulb 7 is arranged in the yielding hole 811, and the lower end face of the adjusting head 8 abuts against the upper end face of the annular convex shoulder 72, so that the thermal bulb 7 can also move downwards along with the adjusting head 8. The lower end face of the annular shoulder 72 abuts against the upper end face of the core 6, and the core 6 moves downwards along with the annular shoulder, so that the hot water inlet amount is reduced, and the cold water inlet amount is increased. Otherwise, the rotating adjusting head 8 is operated, so that the entering amount of hot water can be increased and the entering amount of cold water can be reduced, the convenient and practical effects are realized, the temperature setting of the water mixing center can be not changed, the actual water temperature can be adjusted according to the requirements of different users, and the use by the users is greatly facilitated.

The adjusting head 8 includes a column 81 and a limiting portion 812 protruding from the outer peripheral surface of the lower end of the column 81. The upper end of the valve body 4 is provided with a valve hole 45, and a convex part 46 with internal threads is arranged in the upper end opening of the valve hole 45. The upper end of the column 81 extends out of the valve body 4 and is fixed with a hand wheel 82, and the hand wheel 82 enables a user to use the valve more comfortably, so that the adjusting head 8 can be conveniently rotated. The inner side of the upper end of the valve body 4 is also provided with an annular limiting groove 44, a limiting clamp spring 9 is arranged in the annular limiting groove 44, and the inner edge of the limiting clamp spring 9 extends out of the annular limiting groove 44 and is positioned below a limiting part 812 of the adjusting head 8. The limiting clamp spring 9 and the limiting clamp spring 9 can form a stop, the displacement distance of the adjusting head 8 can be limited, the adjusting head 8 is prevented from excessively moving into the valve body 4 to crush the bulb 7 or the core 6, so that a user does not need to worry about the damage to the valve body 4 caused by excessive force exertion or excessive screwing when screwing the adjusting head 8, the safety is guaranteed, and the operation of the user is facilitated.

As shown in fig. 2-6, an annular boss III 48 is arranged between the cold water opening 42 and the cold water cavity, a water passing head 10 is arranged in the cold water cavity, and the lower end of the water passing head 10 is connected in the annular boss III 48 in a threaded manner. The upper end of the overflow head 10 is positioned in the lower end of the core 6, and the outer side of the upper end of the overflow head 10 is provided with a sealing ring. The core 6 can slide relative to the water passing head 10 and the sealing ring can play a role in sealing the inner side surface of the core 6 and the outer side surface of the upper end of the water passing head 10, so that cold water is prevented from entering the core 6 through a gap between the inner side surface of the core 6 and the outer side surface of the upper end of the water passing head 10. A plurality of water passing holes 101 for communicating the cold water cavity with the cold water port 42 are formed in the side part of the water passing head 10 along the circumferential direction. An annular blocking surface 102 is arranged outside the water overflow head 10, and the annular blocking surface 102 is abutted against the bottom wall of the cold water cavity. The arrangement has two advantages, one is that the excessive threaded connection of the water passing head 10 can be limited to extend into the cold water opening 42, so that a limiting effect is achieved, and the water passing head 10 can be conveniently assembled. Secondly, the annular blocking surface 102 abuts against the bottom wall of the cold water cavity to well reserve a channel for water to pass through, so that the water hole 101 is prevented from being shrunk due to over-assembly. The spring 11 is arranged in the core 6, the upper end of the water passing head 10 is provided with a cavity 103, the inner side of the lower end of each protruding piece 64 is provided with a right-angle notch 641, the lower end of the spring 11 abuts against the bottom wall of the cavity 103, and the upper end of the spring 11 abuts against the top wall of each protruding piece 64 at the right-angle notch 641. The spring force of the spring 11 acts on the tab 64 so that the cartridge 6 always has a tendency to rest against the top wall of the outlet chamber. Because the core 6 can slide relative to the second annular boss 47 to control the mixing of cold water and hot water, and the core 6 is controlled to move downwards by the thermometer bulb 7, the core 6 needs to be fixed initially, and the spring 11 can play a role in limiting the movement of the core 6, thereby improving the safety.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (9)

1. The water mixing center comprises a water pipe I (1), a water pipe II (2), a water pump (3) connected between the water pipe I and the water pipe II and a water mixing valve with a valve body (4), wherein the left end, the lower end and the right end of the valve body (4) are respectively provided with a hot water port (41), a cold water port (42) and a water outlet (43), the water outlet (43) of the valve body (4) is connected with the left end of the water pipe II (2), a bypass pipe (5) is connected between the cold water port (42) of the valve body (4) and the upper side of the left end of the water pipe I (1), a core (6) capable of controlling the proportion of cold water and hot water during moving and a temperature bulb (7) with a heating part (71) at the upper end are arranged in the valve body (4), and the heating part (71) can extend when the water temperature is higher than a set value, the water mixing center is characterized in that the upper end of, the heating part (71) is positioned in the yielding hole (811), an annular convex shoulder (72) is arranged on the outer side of the middle of the thermal bulb (7), the lower end face of the adjusting head (8) abuts against the upper end face of the annular convex shoulder (72), the lower end face of the annular convex shoulder (72) abuts against the upper end face of the core (6), an annular limiting groove (44) is arranged on the inner side of the upper end of the valve body (4), a limiting clamp spring (9) is arranged in the annular limiting groove (44), and the inner edge of the limiting clamp spring (9) extends out of the annular limiting groove (44) and is positioned below the adjusting head (8).

2. The water mixing center according to claim 1, wherein the adjusting head (8) comprises a cylinder (81) and a limiting part (812) protruding out of the outer peripheral surface of the lower end of the cylinder (81), a valve hole (45) is formed in the upper end of the valve body (4), a convex part (49) with internal threads is formed in the upper end opening of the valve hole (45), a hand wheel (82) is fixed on the upper end of the cylinder (81) and extends out of the valve body (4), and the middle part of the cylinder (81) is in threaded connection with the convex part (49).

3. The mixing center according to claim 2, wherein the upper groove wall of the annular limiting groove (44) is inclined upward.

4. The mixing center according to claim 1, 2 or 3, wherein the inner wall of the valve body (4) is provided with a water outlet chamber which divides the inner chamber of the valve body (4) from top to bottom, annular boss one (46) and annular boss two (47) of hot water chamber and cold water chamber, core (6) are both ends opening cylindric and pass core (6) of annular boss one (46) and annular boss two (47), core (6) up end and play water cavity roof counterbalance are leaned on, core (6) upper end lateral part is equipped with a plurality of water gaps (61) along circumference, core (6) lateral part that is located annular boss two (47) inboard is equipped with annular (62), it has a plurality of inlet openings (63) that run through core (6) lateral part to distribute along circumference in annular (62), the last lower port of annular boss two (47) is the flaring respectively, annular (62) upper portion is located annular boss two (47) up end department.

5. The mixing center according to claim 4, wherein the water inlet opening (63) is an arc-shaped opening.

6. The mixing center according to claim 4, wherein a plurality of lugs (64) are circumferentially attached to the inner side of the upper port of the wick (6), and the lower part of the bulb (7) is inserted between the lugs (64).

7. The water mixing center according to claim 6, wherein a third annular boss (48) is arranged between the cold water port (42) and the cold water cavity, a water passing head (10) is arranged in the cold water cavity, the lower end of the water passing head (10) is in threaded connection with the third annular boss (48), the upper end of the water passing head (10) is located in the lower end of the core (6), a sealing ring is arranged on the outer side of the upper end of the water passing head (10), and a plurality of water passing holes (101) communicating the cold water cavity with the cold water port (42) are circumferentially arranged on the side of the water passing head (10).

8. The water mixing center according to claim 7, characterized in that an annular blocking surface (102) is arranged outside the water overflow head (10), and the annular blocking surface (102) is abutted against the bottom wall of the cold water cavity.

9. The water mixing center according to claim 8, wherein a spring (11) is arranged in the core (6), a cavity (103) is arranged at the upper end of the water passing head (10), a right-angle notch (641) is arranged inside the lower end of each lug (64), the lower end of the spring (11) abuts against the bottom wall of the cavity (103), and the upper end of the spring (11) abuts against the top wall of each lug (64) at the right-angle notch (641).

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