A constant temperature valve core that can balance pressure and prevent backflow

Abstract

A thermostatic valve core with pressure balance and anti-backflow function, comprising a valve core body. On the left and right sides of the lower end of the valve core body, there are water inlet connectors, and a sealing seat matching with the water inlet connectors is arranged inside the water inlet connectors; at the center of the lower surface of the sealing seat, there is a water inlet hole; at the center of the upper surface of the sealing seat, there is a sealing hole communicating with the water inlet hole, and the diameter of the sealing hole is larger than that of the water inlet hole; a limiting seat is arranged directly above the sealing seat; there is a water outlet spacing between the lower end surface of the limiting seat and the upper end surface of the sealing seat; there is a water passing gap communicating with the internal space of the valve core body between the outer wall of the limiting seat and the inner wall of the water inlet connector. The thermostatic valve core with pressure balance and anti-backflow function of the present invention can automatically stabilize the pressure when the water pressure is too high, and can play an anti-backflow effect. Moreover, it can effectively filter the impurities in the water flow entering the thermostatic valve core, protect the internal components of the thermostatic valve core, and extend the service life of the thermostatic valve core.

Description

Technical Field

[0001] The present invention relates to a thermostatic valve core, in particular to a thermostatic valve core capable of balancing pressure and preventing backflow. Background Art

[0002] A thermostatic valve core is a device that automatically adjusts the mixing ratio of cold and hot water so that the temperature of the mixed water can be automatically maintained at a set temperature. The thermostatic valve core has two water inlet joints, which receive hot water and cold water respectively. After the hot water and cold water both enter the interior of the thermostatic valve core, the thermostatic valve core will mix the cold and hot water to form a constant-temperature water flow for use.

[0003] Traditional thermostatic valve cores only have the function of mixing water. In the actual use of thermostatic valve cores, it is inevitable that the water pressure is too high or the water flow flows back. However, traditional thermostatic valve cores simply cannot rely on their own structures to cope with these situations. When the water pressure is too high, the water flow pressure will squeeze the internal components of the thermostatic valve core, which is extremely likely to cause damage to the internal components of the thermostatic valve core. In the case of water flow back, it will cause abnormal pressure inside the thermostatic valve core, which will also damage the internal components of the thermostatic valve core. Moreover, the water flow entering the thermostatic valve core is not necessarily clean water. If impurities enter the interior of the thermostatic valve core along with the water flow, they will erode the internal components of the thermostatic valve core, resulting in a shortened service life of the thermostatic valve core. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a thermostatic valve core capable of balancing pressure and preventing backflow, which can automatically stabilize the water pressure when the water pressure is too high, and can achieve the effect of preventing backflow. Moreover, it can effectively filter impurities in the water flow entering the interior of the thermostatic valve core, protect the internal components of the thermostatic valve core, and extend the service life of the thermostatic valve core.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0006] The present invention discloses a constant temperature valve core capable of balancing pressure and preventing backflow, which comprises a valve core body. Water inlet joints are arranged on the left and right sides at the lower end of the valve core body. It is characterized in that: a sealing seat matching with the water inlet joint is arranged in the water inlet joint; a water inlet hole is arranged at the center of the lower surface of the sealing seat; a sealing hole communicating with the water inlet hole is arranged at the center of the upper surface of the sealing seat, and the diameter of the sealing hole is larger than that of the water inlet hole; a limiting seat is arranged directly above the sealing seat; there is a water outlet spacing between the lower end surface of the limiting seat and the upper end surface of the sealing seat; a water passing gap communicating with the internal space of the valve core body is arranged between the outer wall of the limiting seat and the inner wall of the water inlet joint; the limiting seat and the sealing seat are connected by a plurality of support plates evenly distributed in a circumferential manner; an annular clamping step is arranged inside the water inlet joint, and the upper end surface of the support plate is attached to the clamping step; a limiting groove coaxial with the sealing hole is arranged on the lower surface of the limiting seat; a guiding hole communicating with the limiting groove is arranged on the upper surface of the limiting seat; a guiding column matching with the guiding hole is arranged in the guiding hole; the upper end of the guiding column penetrates upward through the guiding hole; the lower end of the guiding column sequentially passes through the limiting groove and the water outlet spacing downward and is provided with a sealing plug for blocking and sealing the upper end hole of the water inlet hole; a spring sleeved outside the guiding column is arranged between the upper surface of the sealing plug and the bottom of the limiting groove; a filtering part matching with the lower end port of the water inlet joint is arranged at the lower end port of the water inlet joint.

[0007] The limiting seat is in the shape of a frustum of a cone with a narrow upper part and a wide lower part; the upper surface of the limiting seat and the upper end surface of the support plate are coplanar; the diameter of the upper end of the limiting seat is smaller than the inner diameter of the clamping step; the diameter of the lower end of the limiting seat is smaller than the inner diameter of the water inlet joint.

[0008] The sealing plug is in the shape of a hemisphere; the diameter of the upper surface of the sealing plug is smaller than the diameter of the sealing hole.

[0009] A water inlet cavity communicating with the water inlet hole is arranged at the center of the upper surface of the filtering part; the lower end of the filtering part is arc-shaped; a plurality of filtering holes communicating with the water inlet cavity are arranged on the lower surface of the filtering part.

[0010] A limiting part fitting with the lower surface of the sealing seat extends outward from the outer edge of the upper end of the filtering part; a sealing ring is sleeved outside the upper end of the filtering part; the upper surface of the sealing ring is attached to the lower surface of the limiting part, the outer peripheral surface of the sealing ring is attached to the inner wall of the water inlet joint, and the inner wall of the sealing ring is attached to the outer wall of the upper end of the filtering part.

[0011] The limiting seat, the sealing seat and the support plates are integrally formed.

[0012] An annular arc-shaped groove is arranged on the inner wall of the part of the water inlet joint opposite to the sealing seat.

[0013] A noise reduction step is arranged on one side of the inner wall of the water inlet joint and directly above the limiting seat.

[0014] The noise reduction step and the clamping step are transitionally connected through an arc-shaped water guide groove, and the inner wall of the water guide groove is an arc surface.

[0015] The beneficial effects of the present invention are as follows:

[0016] Compared with the prior art, the thermostatic valve core with balanced pressure and anti-backflow adopting the structure of the present invention can not only achieve the effect of automatic voltage stabilization when the water pressure is too high through the cooperation between the spring and the sealing plug, but also stop the backflow immediately when the water flow returns, achieving the anti-backflow effect, effectively avoiding the situation that the internal components of the thermostatic valve core are damaged due to pressure problems, and playing a role in protecting the internal components of the thermostatic valve core. The existence of the filter element can more effectively filter the impurities in the cold and hot water, effectively avoiding the situation that the impurities penetrate into the internal space of the thermostatic valve core along with the water flow and damage the internal components, further protecting the internal components of the thermostatic valve core, and thus further extending the service life of the thermostatic valve core. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the thermostatic valve core with balanced pressure and anti-backflow of the present invention. Detailed Embodiments

[0018] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0019] Please refer to Figure 1, the present invention provides a constant temperature valve core that can balance pressure and prevent backflow, including a valve core body 1. On the left and right sides of the lower end of the valve core body 1, there are water inlet joints 2, and a sealing seat 3 matching with the water inlet joints 2 is arranged inside the water inlet joints 2; a water inlet hole 4 is arranged at the center of the lower surface of the sealing seat 3; a sealing hole 5 communicating with the water inlet hole 4 is arranged at the center of the upper surface of the sealing seat 3, and the diameter of the sealing hole 5 is larger than that of the water inlet hole 4; a limiting seat 6 is arranged directly above the sealing seat 3; there is a water outlet spacing 7 between the lower end face of the limiting seat 6 and the upper end face of the sealing seat 3; there is a water passing gap 8 between the outer wall of the limiting seat 6 and the inner wall of the water inlet joint 2, which is communicated with the internal space of the valve core body 1; the limiting seat 6 and the sealing seat 3 are connected by a plurality of support plates 9 evenly distributed in a circle; an annular clamping step 10 is arranged inside the water inlet joint 2, and the upper end face of the support plate 9 is attached to the clamping step 10; a limiting groove 11 coaxial with the sealing hole 5 is arranged on the lower surface of the limiting seat 6; a guiding hole 12 communicating with the limiting groove 11 is arranged on the upper surface of the limiting seat 6; a guiding column 13 matching with the guiding hole 12 is arranged inside the guiding hole 12; the upper end of the guiding column 13 passes upward through the guiding hole 12; the lower end of the guiding column 13 passes downward through the limiting groove 11 and the water outlet spacing 7 in sequence, and a sealing plug 14 for blocking and sealing the upper end hole of the water inlet hole 4 is arranged; a spring 15 sleeved outside the guiding column 13 is arranged between the upper surface of the sealing plug 14 and the bottom of the limiting groove 11; a filtering part 16 matching with the lower end port of the water inlet joint 2 is arranged at the lower end port of the water inlet joint 2.

[0020] The limiting seat 6 is in the shape of a frustum of a cone with a narrow upper part and a wide lower part; the upper surface of the limiting seat 6 and the upper end surface of the support plate 9 are coplanar; the diameter of the upper end of the limiting seat 6 is smaller than the inner diameter of the clamping step 10; the diameter of the lower end of the limiting seat 6 is smaller than the inner diameter of the water inlet joint 2.

[0021] The sealing plug 14 is in the shape of a hemisphere; the diameter of the upper surface of the sealing plug 14 is smaller than the diameter of the sealing hole 5.

[0022] A water inlet cavity 17 communicating with the water inlet hole 4 is arranged at the center of the upper surface of the filtering part 16; the lower end of the filtering part 16 is in an arc shape; a plurality of filtering holes 18 communicating with the water inlet cavity 17 are arranged on the lower surface of the filtering part 16.

[0023] A limiting part 19 extending outward and fitting with the lower surface of the sealing seat 3 is extended from the outer edge of the upper end of the filtering part 16; a sealing ring 20 is sleeved outside the upper end of the filtering part 16; the upper surface of the sealing ring 20 is attached to the lower surface of the limiting part 19, the outer peripheral surface of the sealing ring 20 is attached to the inner wall of the water inlet joint 2, and the inner wall of the sealing ring 20 is attached to the outer wall of the upper end of the filtering part 16.

[0024] The limiting seat 6, the sealing seat 3 and the support plate 9 are integrally formed.

[0025] The inner wall of the part of the water inlet joint 2 opposite to the sealing seat 3 is provided with an annular arc-shaped groove 21.

[0026] One side of the inner wall of the water inlet joint 2 is provided with a noise reduction step 22 directly above the limit seat 6.

[0027] The noise reduction step 22 and the clamping step 10 are connected by an arc-shaped water guide groove 23 in a transitional manner, and the inner wall of the water guide groove 23 is an arc surface.

[0028] The usage method of the present invention is as follows:

[0029] When cold water and hot water flow into the valve core body 1 through the water inlet joints 2 provided on the left and right sides of the lower end of the valve core body 1, they will inevitably pass through the filter element 16. At this time, the filter holes 18 on the filter element 16 will filter the impurities in the water flow, intercept the impurities outside the filter element 16, and ensure that the water flow entering the water inlet cavity 17 through the filter holes 18 is clean water flow. Then, the water flow in the water inlet cavity 17 will enter the water inlet hole 4. At this moment, the water pressure is greater than the elasticity of the spring 15, and the water flow will push the sealing plug 14 upward. The spring 15 is compressed. As the sealing plug 14 moves upward, the upper end hole of the water inlet hole 4 originally blocked and sealed by the sealing plug 14 communicates with the sealing hole 5, and the water flow flows through the gap between the outer wall of the sealing plug 14 and the inner wall of the sealing hole 5 to the position of the water outlet gap. The support plates 9 are evenly distributed in a circle, so the water flow can enter the water passing gap 8 through the gaps between the support plates 9. When the diameter of the upper end of the limit seat 6 is smaller than the inner diameter of the clamping step 10, the existence of the clamping step 10 will not prevent the water passing gap 8 from continuing to penetrate into the internal space of the valve core body 1. Finally, both cold water and hot water flow into the internal space of the valve core body 1 for water mixing for use.

[0030] If the water pressure is too high when the water flow passes through the water inlet joint 2, the water pressure will continuously squeeze the spring 15 upward through the sealing plug 14. The compressed spring 15 will generate elasticity, and this elasticity will effectively counteract the water pressure, thereby achieving the effect of buffering the water pressure and playing a voltage stabilizing function.

[0031] If the water flow has a backflow situation after entering the water inlet joint 2, once the water flow backflows, the internal pressure of the valve core body 1 will be abnormal. At this time, the elasticity generated by the compression of the spring 15 will cause the sealing plug 14 to reset, and the sealing plug 14 will reset immediately to block and seal the orifice of the water inlet hole 4 again, playing a check and anti-backflow effect.

[0032] As described above, through the cooperation between the spring 15 and the sealing plug 14, the present invention can not only achieve the effect of automatic pressure stabilization when the water pressure is too high, but also prevent backflow immediately when the water flows back, achieving the anti-backflow effect, effectively avoiding the situation that the internal components of the thermostatic valve core are damaged due to pressure problems, protecting the internal components of the thermostatic valve core, and the presence of the filter element 16 can more effectively filter impurities in the cold and hot water, effectively avoiding the situation that impurities penetrate into the internal space of the thermostatic valve core along with the water flow and damage the internal components, further protecting the internal components of the thermostatic valve core, and thus further extending the service life of the thermostatic valve core.

[0033] Since the limiting seat 6 is in the shape of a frustum of a cone with a narrower upper part and a wider lower part, the outer wall of the limiting seat 6 is a conical surface with a narrower upper part and a wider lower part, resulting in the space of the water passing gap 8 increasing gradually from bottom to top. In the case of too high water pressure, the gradually increasing space can continuously release the water pressure. On the basis of the pressure stabilization of the spring 15, an additional pressure reduction structure is added, so as to ensure to the greatest extent that the water flow entering the internal space of the valve core body 1 is normal water flow.

[0034] The sealing plug 14 is hemispherical, so the seal between the sealing plug 14 and the upper end orifice of the water inlet hole 4 is a seal between a surface and a line. Once the sealing plug 14 moves upward, the upper end orifice of the water inlet hole 4 is opened, improving the sensitivity during normal water inlet. Similarly, once the sealing plug 14 resets and moves downward to contact the upper end orifice of the water inlet hole 4, it can block and seal the upper end orifice of the water inlet hole 4, effectively improving the anti-backflow efficiency.

[0035] The lower end of the filter element 16 is arc-shaped, and the filter element 16 can effectively guide the water flow through the arc-shaped outer wall. When guiding the water flow to disperse evenly, the water pressure can be buffered to a certain extent, so as to preliminarily buffer the water pressure before the water flow with too high pressure enters the water inlet joint 2, and improve the pressure stabilization effect to the greatest extent.

[0036] An outer edge of the upper end of the filter element 16 extends outward to form a limiting part 19 that fits the lower surface of the sealing seat 3. A sealing ring 20 is sleeved on the upper end of the filter element 16. The upper surface of the sealing ring 20 fits the lower surface of the limiting part 19, the outer peripheral surface of the sealing ring 20 fits the inner wall of the water inlet joint 2, and the inner wall of the sealing ring 20 fits the outer wall of the upper end of the filter element 16. The presence of the sealing ring 20 can effectively ensure the sealing between the lower end port of the water inlet joint 2 and the filter element 16, effectively avoiding the situation that the water flow leaks outward through the gap between the outer wall of the sealing seat 3 and the inner wall of the water inlet joint 2, and thus effectively avoiding the situation that the water pressure is unstable due to the outward leakage of the water flow.

[0037] The limit seat 6, the sealing seat 3 and the support plate 9 are integrally formed, which can effectively ensure the accuracy of the positions of the limit seat 6, the sealing seat 3 and the support plate 9, so as to ensure that when the upper orifice of the water inlet hole 4 is opened, the water flow can smoothly pass through the water passing gap 8 and penetrate into the internal space of the valve core body 1.

[0038] An annular arc-shaped groove 21 is provided on the inner wall of the part of the water inlet joint 2 opposite to the sealing seat 3. The existence of the arc-shaped groove 21 can make the water inlet joint 2 have a certain elasticity when the sealing seat 3 and the water inlet joint 2 are in interference fit, making it easier for the sealing seat 3 to be embedded into the water inlet joint, and at the same time facilitating the disassembly of the sealing seat 3, which is convenient for the maintenance and replacement of components.

[0039] On one side of the inner wall of the water inlet joint 2, there is a noise reduction step 22 located directly above the limit seat 6. When the water flow passes through the water passing gap 8 and flows above the limit seat 6, a part of the water flow will directly penetrate towards the internal space of the valve core body 1, while the other part will be blocked by the noise reduction step 22, so that the water flow cannot flow towards the internal space of the valve core body 1 in a direct way and needs to flow along the step surface of the noise reduction step 22 to cross the noise reduction step 22. The existence of the noise reduction step 22 effectively changes the trajectory of the direct water flow, effectively avoiding the situation that the too fast flow rate of the direct water flow is likely to generate noise, and achieving the effect of noise reduction.

[0040] The noise reduction step 22 and the clamping step 10 are connected by a water guide groove 23 in a transitional manner. When the water flow impacts upward on the noise reduction step 22 for the first time, under the action of the impact force, the water flow will rebound towards the upper end surface of the limit seat 6 and finally diffuse outwards. A part of the water flow that diffuses outwards will impact towards the water guide groove 23. The water guide groove 23 is arc-shaped and the inner wall of the water guide groove 23 is an arc surface. When the water flow rushes into the water guide groove 23, under the guidance of the arc-shaped trajectory of the water guide groove 23 and the action of the impact force, the water flow will be arc-shaped along the trajectory of the water guide groove 23. Even when the water flow rushes out of the water guide groove 23, under the action of inertia, an arc-shaped water flow will be formed, thus forming a water curtain that is almost close to a ring shape directly above the limit seat 6, forming an obstacle, which can block this part of the water flow to a certain extent when the water flow passes through the water passing gap 8 and flows directly above the limit seat 6, relieve the flow rate, and further achieve the effect of noise reduction, ensuring the silent effect when the constant temperature valve core is used.

Claims

1. A constant temperature valve core capable of balancing pressure and preventing backflow, comprising a valve core body, and water inlet joints are arranged on the left and right sides of the lower end of the valve core body, and it is characterized in that: A sealing seat matching the water inlet joint is arranged inside the water inlet joint; a water inlet hole is arranged at the center of the lower surface of the sealing seat; a sealing hole communicating with the water inlet hole is arranged at the center of the upper surface of the sealing seat, and the diameter of the sealing hole is larger than that of the water inlet hole; a limiting seat is arranged directly above the sealing seat; there is a water outlet spacing between the lower end face of the limiting seat and the upper end face of the sealing seat; there is a water passing gap communicating with the inner space of the valve core body between the outer wall of the limiting seat and the inner wall of the water inlet joint; the limiting seat and the sealing seat are connected by a plurality of support plates evenly distributed in a circumferential manner; an annular clamping step is arranged inside the water inlet joint, and the upper end face of the support plate is attached to the clamping step; a limiting groove coaxial with the sealing hole is arranged on the lower surface of the limiting seat; a guiding hole communicating with the limiting groove is arranged on the upper surface of the limiting seat; a guiding column matching the guiding hole is arranged in the guiding hole; the upper end of the guiding column extends upward out of the guiding hole; the lower end of the guiding column sequentially passes through the limiting groove and the water outlet spacing downward and is provided with a sealing plug for plugging and sealing the upper end hole of the water inlet hole; a spring sleeved outside the guiding column is arranged between the upper surface of the sealing plug and the bottom of the limiting groove; a filtering member matching the lower end port of the water inlet joint is arranged; the limiting seat is in the shape of a frustum of a cone with a narrow upper part and a wide lower part; the upper surface of the limiting seat is coplanar with the upper end surface of the support plate; the diameter of the upper end of the limiting seat is smaller than the inner diameter of the clamping step; the diameter of the lower end of the limiting seat is smaller than the inner diameter of the water inlet joint; an anti-noise step is arranged on one side of the inner wall of the water inlet joint directly above the limiting seat.

2. The thermostatic valve core capable of balancing pressure and preventing backflow according to claim 1, characterized in that: The sealing plug is hemispherical; the diameter of the upper surface of the sealing plug is smaller than that of the sealing hole.

3. The thermostatic valve core capable of balancing pressure and preventing backflow according to claim 1, characterized in that: A water inlet cavity communicating with the water inlet hole is arranged at the center of the upper surface of the filtering member; the lower end of the filtering member is arc-shaped; a plurality of filtering holes communicating with the water inlet cavity are arranged on the lower surface of the filtering member.

4. The thermostatic valve core capable of balancing pressure and preventing backflow according to claim 3, wherein: A limiting portion extending outward and fitting the lower surface of the sealing seat is extended from the outer edge of the upper end of the filtering member; a sealing ring is sleeved outside the upper end of the filtering member; the upper surface of the sealing ring is attached to the lower surface of the limiting portion, the outer peripheral surface of the sealing ring is attached to the inner wall of the water inlet joint, and the inner wall of the sealing ring is attached to the outer wall of the upper end of the filtering member.

5. A thermostatic valve core capable of balancing pressure and preventing backflow, as described in claim 1, wherein: The limiting seat, the sealing seat and the support plate are integrally formed.

6. The thermostatic valve core capable of balancing pressure and preventing backflow according to claim 1, wherein: An annular arc-shaped groove is arranged on the inner wall of the part of the water inlet joint opposite to the sealing seat.

7. A thermostatic valve core capable of balancing pressure and preventing backflow according to claim 1, characterized in that: The anti-noise step and the clamping step are connected by an arc-shaped water guiding groove in a transitional manner, and the inner wall of the water guiding groove is an arc surface.

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