Thermostatic valve core of water heater

Abstract

The utility model discloses a constant temperature valve core of a water heater, which comprises a valve body, a main valve, a cold and hot water inlet and a constant temperature water outlet, and a mixing cavity for promoting convection collision of cold water and hot water to realize mixing and water flow pressure reduction is arranged on the valve body. At least two mixing valves capable of opening and closing water flow are arranged between the mixing cavity and the cold and hot water inlet, valve plugs capable of achieving fine adjustment and flow limiting are arranged in the mixing valves, and a driving structure used for driving and controlling opening and closing of the mixing valves and the water flow and a linkage structure are arranged at the top of the valve body. According to the utility model, hot water and cold water are subjected to convection, a space for mixing the hot water and the cold water is provided, the impact speed and force of water flow on the main valve are reduced during mixing, the damage to the valve is avoided, the cold water and the hot water can be fully mixed, and the mixed warm water is consistent in temperature when discharged; and long-time preheating during water discharging is avoided.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a thermostatic valve core of a water heater. Background Art

[0002] The function of the thermostatic valve of the water heater is to mix a controllable amount of cold water and hot water to form temperature-adjustable warm water, and let the warm water flow out by controlling the main valve. The thermostatic valve core in the existing water heater is generally composed of a cold water inlet valve and a hot water inlet valve. The mixture of cold water and hot water is discharged directly, and the pressure on the main valve when the water is discharged is relatively large, which affects the service life of the main valve. The main valve is easily damaged over time, which has a great damage to the water outlet pipeline.

[0003] And because the traditional cold water inlet valve and hot water inlet valve have a single output to the main valve on the left and right sides, the cold water has a faster flow rate and a larger flow rate than the hot water that needs to be treated. The cold water and hot water are not fully mixed into warm water. This results in the cold water flowing out first when the water is discharged, and the warm water will flow out after a period of time.

[0004] In addition, traditional cold water inlet valves and hot water inlet valves both use trapezoidal valve plugs. When the valve is sealed, the water flow is controlled according to the relative position of the valve plug and the water hole. However, if only a trapezoidal valve plug is used, the water flow is output in a ring shape, the output water flow rate is uncontrollable, and it is difficult to perform fine flow control. Utility Model Content

[0005] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide a thermostatic valve core of a water heater that can reduce the impact pressure of water flow on the main valve, can achieve sufficient mixing of cold water and hot water when the water is discharged, and can finely control the water flow of the cold water inlet valve and the hot water inlet valve.

[0006] In order to achieve the above object, the present invention provides the following solutions:

[0007] A thermostatic valve core for a water heater comprises a valve body, a main valve, hot and cold water inlets and a thermostatic water outlet; a mixing chamber is provided on the valve body for promoting convection collision of cold water and hot water to achieve mixing and water flow pressure reduction; at least two mixing valves for opening and closing water flow are provided between the mixing chamber and the hot and cold water inlets; a valve plug for fine-tuning flow limiting is provided in the mixing valve; a drive structure and a linkage structure for driving and controlling the opening and closing of the mixing valve and the water flow rate are provided on the top of the valve body.

[0008] Furthermore, a valve cavity is provided in the valve body of the present invention and between the cold and hot water inlets and the mixing cavity, and the mixing valve is provided in the valve cavity.

[0009] Furthermore, the mixing valve in the present invention includes a valve housing, a side hole connecting the cold and hot water inlets is provided on one side of the valve housing, a valve hole is provided on the upper and lower sides of the valve housing, a linearly movable valve stem is inserted inside the valve housing, the valve plug is provided on the valve stem and can block the valve hole, and a water hole 1 and a water hole 2 connected to the mixing chamber are respectively provided at the upper and lower ends of the valve housing.

[0010] Furthermore, the mixing chamber in the present invention includes a chamber 1 connected to the constant temperature water outlet, a chamber 2 connected to the chamber 1 and located between two mixing valves, and a chamber 3 connected to the chamber 2 and located at one end of the two mixing valves.

[0011] Furthermore, the second cavity in the present invention is located between the two first water holes to allow the cold and hot water to collide with each other, and the third cavity faces the two second water holes to allow the cold and hot water to collide with each other.

[0012] Furthermore, a clamping portion is provided on the valve stem in the present invention and a valve plug can be installed thereon. The valve plug is trapezoidal, and a wavy convex line 1 and a convex line 2 arranged alternately with the convex line 1 are provided on the outer wall of the valve plug.

[0013] Furthermore, the driving structure in the present invention includes a driving shell arranged on the top of the valve body, and a servo motor is arranged on the rear side of the driving shell.

[0014] Furthermore, the linkage structure in the present invention includes a gear set arranged on the top of the drive housing, an external screw is arranged on the front side of the interior of the drive housing, the gear set is connected to the top of the movable end of the servo motor and the external screw, and an internal threaded sleeve that can slide up and down is arranged on the front side of the interior of the drive housing, the internal threaded sleeve and the external screw are connected by threads, and the bottom of the internal threaded sleeve is fixedly connected to the top of the valve stem by screws.

[0015] Furthermore, a water stop block is provided on the valve body of the present invention and located between the drive housing and the valve housing. The water stop block is fixedly installed on the top of the valve body by threads, and the valve stem can be movably inserted into the center of the water stop block.

[0016] In summary, the present invention has the following beneficial effects compared to the prior art:

[0017] The utility model allows hot water and cold water to circulate in opposite directions and has a space for mixing the hot water and the cold water. During the mixing period, the speed and force of the water flow impacting the main valve are reduced to avoid damage to the valve.

[0018] Because there is space for cold water and hot water to be fully mixed, and the driving structure and linkage structure allow the mixing valve to control the flow of cold water and hot water, the cold water and hot water can be fully mixed and the temperature of the mixed warm water is consistent when it comes out, avoiding the need for long preheating when the water comes out.

[0019] In addition, the valve plug is equipped with wavy convex lines, which can finely control the water flow of the cold water inlet valve and the hot water inlet valve, and control the hot and cold temperatures more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the three-dimensional schematic diagrams of the present utility model;

[0021] Figure 2 This is the second three-dimensional schematic diagram of the utility model;

[0022] Figure 3 It is a schematic diagram of a planar analysis of the present utility model;

[0023] Figure 4 This is a schematic diagram of a planar cross-section of the valve body of the utility model;

[0024] Figure 5 This is a three-dimensional schematic diagram of the valve body of the utility model;

[0025] Figure 6 This is a schematic plan view of the mixing valve of the present invention;

[0026] Figure 7 This is a three-dimensional exploded schematic diagram of the drive structure of the utility model;

[0027] Figure 8 This is a three-dimensional exploded schematic diagram of the valve plug of the utility model. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] like Figures 1 to 8The embodiment of the present invention shown preferably provides a thermostatic valve core for a water heater, comprising a valve body 1, a main valve 11, hot and cold water inlets 12, and a thermostatic water outlet 13. A mixing chamber 2 is provided on the valve body 1 to promote the convection collision of cold and hot water to achieve mixing and reduce water flow pressure. At least two mixing valves 3 are provided between the mixing chamber 2 and the hot and cold water inlets 12 to open and close the water flow. A valve plug 4 is provided within the mixing valve 3 to achieve fine-tuning of the flow limit. A drive structure 5 and a linkage structure 6 for driving and controlling the opening and closing of the mixing valve 3 and the water flow rate are provided at the top of the valve body 1. The main valve installed on the valve body can control the flow of mixed warm and hot water from the thermostatic water outlet. There are two hot and cold water inlets, which can be used to connect to the inlet of hot water and cold water, respectively. The mixing chamber provides ample space for mixing cold and hot water, as well as for their convection and collision. The mixing valve opens and closes the flow of cold and hot water. The valve plug inside the mixing valve allows for fine-tuning of the cold and hot water volumes, precisely determining the ratio. When the drive mechanism is activated, the linkage mechanism drives the mixing valve to open and close.

[0030] The specific work flow is as follows: the driving structure starts, the mixing valve is opened through the linkage structure, and the water flow is controlled. The two cold and hot water inlets respectively transport cold water and hot water to the mixing valve, and then from the mixing valve to the mixing chamber. After the main valve is opened, warm and hot water will be transported out.

[0031] In the present invention, a valve cavity 14 is provided in the valve body 1 between the hot and cold water inlets 12 and the mixing chamber 2, and the mixing valve 3 is provided in the valve cavity 14. The valve cavity is used to install the mixing valve and is a cylindrical cavity for placing a columnar mixing valve.

[0032] The mixing valve 3 described in the present invention includes a valve housing 31. A side hole 32 connecting to the hot and cold water inlets 12 is provided on one side of the valve housing 31. A valve hole 33 is provided on both the upper and lower sides of the valve housing 31. A linearly movable valve stem 34 is inserted into the interior of the valve housing 31. The valve plug 4 is provided on the valve stem 34 and can block the valve hole 33. Water hole 1 35 and water hole 2 36 connecting to the mixing chamber 2 are provided at the upper and lower ends of the valve housing 31, respectively. The side holes are provided on the left and right sides of the valve housing to connect water from the hot and cold water inlets to the mixing valve. When the valve stem is driven upward by the driving structure, the valve plug opens the valve hole, allowing water to be sent out from water hole 1 and water hole 2 and enter the mixing chamber. A waterproof sealing ring can be installed between the outside of the valve housing and the valve chamber to enhance the waterproof performance.

[0033] The mixed cavity 2 includes a cavity one 21 connected with the constant temperature water outlet 13, a cavity two 22 connected with the cavity one 21 and located between the two mixing valves 3, and a cavity three 23 connected with the cavity two 22 and located at one end of the two mixing valves 3.

[0034] The cavity two 22 is located between the two water holes one 35 to allow the hot and cold water to flow and collide, and the cavity three 23 is opposite to the two water holes two 36 to allow the hot and cold water to flow and collide. The flow and collision can make the mixing of cold water and hot water more thorough, and can slow down the flow rate and reduce the impact pressure.

[0035] The valve rod 34 is provided with a clamping portion 71, and the valve plug 4 can be installed thereon. The valve plug 4 is trapezoidal, and the outer wall surface of the valve plug 4 is provided with a wave-shaped convex line one 72 and a convex line two 73 staggered with the convex line one 72. The clamping portion is a rod-shaped portion narrower than the valve rod, and the valve plug can be installed thereon. The valve hole is a straight hole, so the trapezoidal valve plug can block the valve hole well. The wave-shaped convex line one cooperates with the convex line two to increase the fine control of the valve plug on the water flow. When the valve plug moves upward, the upper wave of the convex line one squeezes the space where the water flow can flow out, until the lower wave of the convex line one and the convex line two completely separates from the valve hole, at which time the valve hole is completely open. The wave-shaped convex line one cooperates with the vertically staggered convex line two to change the annular water outlet of the valve plug into multiple point-shaped water outlets, achieving finer flow control, so that fine control and more accurate data can be achieved. The waterproof sealing ring can be installed on the valve rod to increase the waterproof performance.

[0036] The driving structure 5 includes a driving shell 51 arranged at the top of the valve body 1, and a servo motor 52 arranged at the inner rear side of the driving shell 51. The servo motor capable of rotating forward and backward can drive the valve rod to move up or down through the linkage structure.

[0037] The linkage structure 6 described in the present invention includes a gear set 61 arranged at the top of the drive housing 51, an external screw 62 is arranged on the front side of the interior of the drive housing 51, the gear set 61 is connected to the top of the movable end of the servo motor 52 and the external screw 62, and an internal screw sleeve 63 that can slide up and down is arranged on the front side of the interior of the drive housing 51. The internal screw sleeve 63 and the external screw 62 are connected by threads, and the bottom of the internal screw sleeve 63 is fixedly connected to the top of the valve stem 34 by screws. The gear set enables the servo motor to drive the external screw to rotate. The gear set can be set to multiple gears until it can drive the external screw to rotate. The rotation of the external screw can cause the internal screw sleeve to move linearly upward or downward, thereby causing the valve stem to move linearly up and down.

[0038] In the present invention, a water stop 81 is provided on the valve body 1 between the drive housing 51 and the valve housing 31. The water stop 81 is threadedly fixed to the top of the valve body 1, and the valve stem 34 is movably inserted through the center of the water stop 81. The water stop is used to prevent water from entering the drive housing, and waterproof performance can be enhanced by installing a waterproof sealing ring.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermostatic valve core for a water heater, comprising a valve body (1), a main valve (11), hot and cold water inlets (12), and a thermostatic water outlet (13), characterized in that: The valve body (1) is provided with a mixing chamber (2) for promoting the convection collision of cold water and hot water to achieve mixing and water flow pressure reduction. At least two mixing valves (3) capable of opening and closing water flow are provided between the mixing chamber (2) and the cold and hot water inlets (12). A valve plug (4) capable of achieving fine-tuning flow restriction is provided in the mixing valve (3). A driving structure (5) and a linkage structure (6) for driving and controlling the opening and closing of the mixing valve (3) and the water flow rate are provided on the top of the valve body (1).

2. A thermostatic valve core for a water heater according to claim 1, characterized in that: A valve cavity (14) is provided in the valve body (1) and between the cold and hot water inlets (12) and the mixing cavity (2), and the mixing valve (3) is provided in the valve cavity (14).

3. The thermostatic valve core of a water heater according to claim 1, characterized in that: The mixing valve (3) includes a valve housing (31), a side hole (32) connected to the hot and cold water inlets (12) is provided on one side of the valve housing (31), a valve hole (33) is provided on both the upper and lower sides of the valve housing (31), a linearly movable valve stem (34) is inserted into the interior of the valve housing (31), the valve plug (4) is provided on the valve stem (34) and can block the valve hole (33), and a water hole 1 (35) and a water hole 2 (36) connected to the mixing chamber (2) are provided at the upper and lower ends of the valve housing (31).

4. The thermostatic valve core of a water heater according to claim 3, characterized in that: The mixing chamber (2) comprises a chamber 1 (21) connected to the constant temperature water outlet (13), a chamber 2 (22) connected to the chamber 1 (21) and located between the two mixing valves (3), and a chamber 3 (23) connected to the chamber 2 (22) and located at one end of the two mixing valves (3).

5. The thermostatic valve core of a water heater according to claim 4, characterized in that: The second cavity (22) is located between the two first water holes (35) to allow the cold and hot water to collide with each other, and the third cavity (23) is directly opposite the two second water holes (36) to allow the cold and hot water to collide with each other.

6. The thermostatic valve core of a water heater according to claim 3, characterized in that: A clamping portion (71) is provided on the valve stem (34) and a valve plug (4) can be installed thereon. The valve plug (4) is trapezoidal, and a wavy convex line (72) and a convex line (73) arranged alternately with the convex line (72) are provided on the outer wall of the valve plug (4).

7. The thermostatic valve core of a water heater according to claim 3, characterized in that: The driving structure (5) comprises a driving housing (51) arranged on the top of the valve body (1), and a servo motor (52) is arranged on the rear side of the driving housing (51).

8. The thermostatic valve core of a water heater according to claim 7, characterized in that: The linkage structure (6) includes a gear set (61) arranged on the top of the drive housing (51), an external screw (62) is arranged on the front side of the interior of the drive housing (51), the gear set (61) is connected to the top of the movable end of the servo motor (52) and the external screw (62), an internal screw sleeve (63) that can slide up and down is arranged on the front side of the interior of the drive housing (51), the internal screw sleeve (63) and the external screw (62) are connected by threads, and the bottom of the internal screw sleeve (63) is fixedly connected to the top of the valve stem (34) by screws.

9. The thermostatic valve core of a water heater according to claim 8, characterized in that: A water stop block (81) is provided on the valve body (1) and between the drive housing (51) and the valve housing (31). The water stop block (81) is fixedly mounted on the top of the valve body (1) by means of threads, and the valve stem (34) is movably inserted into the center of the water stop block (81).

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