A thermostatic valve

Abstract

The present invention discloses a thermostatic valve, which comprises a valve body, and a mixing chamber, a cold water chamber and a hot water chamber arranged on the valve body. The cold water chamber and the hot water chamber are arranged on the same side and are separated from the mixing chamber by a partition plate arranged in the middle. The partition plate is provided with a first through hole communicating the mixing chamber with the cold water chamber and a second through hole communicating the mixing chamber with the hot water chamber. The thermostatic valve further comprises a rotating shaft rotatably fixed on the valve body. The rotating shaft passes through the cold water chamber and the hot water chamber, one end is connected with a driving motor, and the other end is fixed on a mounting bracket arranged on the valve body. Moreover, first valve cores and second valve cores are arranged at positions of the rotating shaft corresponding to the first through hole and the second through hole respectively, and are respectively used for controlling the sizes of the communication between the first through hole and the second through hole and the cold water chamber and the hot water chamber. The thermostatic valve provided by the present invention can linearly control the proportion of cold and hot water, achieve precise adjustment of the outlet water temperature, and obtain water with a relatively constant temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly relates to a thermostatic valve. Background Art

[0002] The existing cold and hot water mixing is usually completed by a mixing valve. Generally, one end of the mixing valve is connected to hot water, and the other end is connected to cold water. By adjusting the ratio of cold and hot water, the water temperature is adjusted, which is commonly used in places where warm water is required in bathrooms, washrooms or kitchens. The existing mixing valve adjusts the water temperature manually, which is not only inaccurate, but also requires manual real-time adjustment when the water temperature of the hot water source changes, which is rather cumbersome. In addition, the existing rotating shaft simultaneously adjusts the water volume and water temperature. Therefore, the way of blocking is used to control the inflow size and ratio of hot water and cold water. The valve core needs to bear the impact force of water pressure, making the torque of the rotating shaft larger. And during the adjustment process, it is difficult to linearly control the ratio of cold and hot water in the mixing valve, so that the change of temperature is not linear, making it difficult to control the water temperature adjustment. It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0003] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a thermostatic valve, aiming to solve the defects that the mixing valve in the prior art adjusts the water temperature inaccurately and the operation is cumbersome.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A thermostatic valve, which includes a valve body, a mixing chamber, a cold water chamber and a hot water chamber arranged on the valve body. The cold water chamber and the hot water chamber are arranged on the same side and are separated from the mixing chamber by a partition plate arranged in the middle. The partition plate is provided with a first through hole communicating the mixing chamber with the cold water chamber and a second through hole communicating the mixing chamber with the hot water chamber. The thermostatic valve further includes a rotating shaft. The rotating shaft passes through the cold water chamber and the hot water chamber, one end is connected to a driving motor through a connecting member arranged, and the other end is fixed on a mounting bracket arranged on the valve body. And the rotating shaft is respectively provided with a first valve core and a second valve core at positions corresponding to the first through hole and the second through hole, which are respectively used to control the size of the communication between the first through hole and the second through hole and the cold water chamber and the hot water chamber.

[0006] In the thermostatic valve, the first valve core and the second valve core are provided with gradually changing arc-shaped convex blocks. One end of the arc edge of the arc-shaped convex block is tangent to the circle of the valve core, and the other end protrudes, forming an arc-shaped convex block that gradually becomes larger from the tangent end. And the first through hole and the second through hole are respectively slot holes matching the first valve core and the second valve core.

[0007] In the thermostatic valve, the mixing chamber is provided with a baffle, the height of the baffle is less than the inner height of the mixing chamber, and the baffle forms a U-shaped channel in the mixing chamber.

[0008] In the thermostatic valve, the thermostatic valve is further provided with a connecting member. One end of the connecting member is connected to the motor, and the other end is connected to the rotating shaft. The connecting member is further provided with a spool offset detection optocoupler.

[0009] In the thermostatic valve, the thermostatic valve is further provided with a cold water joint, a hot water joint and a warm water outlet joint. The cold water joint connects the cold water chamber and the cold water source through a pipeline. The hot water joint connects the hot water chamber and the hot water source through a pipeline. The warm water outlet joint connects the mixing chamber and the switching valve through a pipeline.

[0010] In the thermostatic valve, gaskets are provided at the connections of the cold water joint, the hot water joint and the warm water outlet joint with the valve body.

[0011] In the thermostatic valve, check valves are provided on both the cold water joint and the hot water joint.

[0012] In the thermostatic valve, a temperature sensor is further provided near the warm water outlet joint of the mixing chamber.

[0013] In the thermostatic valve, the thermostatic valve is further provided with a control unit. The control unit includes a control panel and a control chip. The control panel is provided with a temperature setting button and a temperature display interface. The control unit is electrically connected to the drive motor, the temperature sensor and the spool offset detection optocoupler respectively.

[0014] Beneficial effects:

[0015] The present invention provides a thermostatic valve. By providing a rotating shaft with a first spool and a second spool, and the first spool and the second spool having an arc-shaped convex block structure with linear involute, the water temperature of the thermostatic valve can be linearly controlled, achieving precise adjustment of the outlet water temperature and obtaining water with a relatively constant temperature. Compared with the prior art, it has the following beneficial effects:

[0016] (1) The first spool and the second spool are arc-shaped convex block structures that gradually open, so that the flow areas of the first through hole and the second through hole can be adjusted more precisely, and further the ratio of cold and hot water can be controlled more precisely, obtaining a more accurate water temperature.

[0017] (2) The rotating shaft is on the same side as the cold water chamber and the hot water chamber. When the rotating shaft is adjusted, the pressure against the water pressure it bears is smaller, so its torque is smaller and it has a longer service life.

[0018] (3) The spool offset detection optocoupler can detect the offset positions of the first spool and the second spool in real time, so as to know the ratio of cold and hot water, which is convenient for the controller to control the motor to adjust the rotation of the rotating shaft. Description of the drawings

[0019] Figure 1 is a perspective view of the thermostatic valve provided by the present invention;

[0020] Figure 2 is a schematic structural diagram of the cross-section of a thermostatic valve;

[0021] Figure 3 is a schematic structural diagram of each part linked to the rotating shaft;

[0022] Figure 4 is Figure 2 a schematic structural diagram of the AA plane in (a state diagram where the arc-shaped convex block blocks the second through hole);

[0023] Figure 5 is Figure 2 a schematic structural diagram of the AA plane in (a state diagram where the arc-shaped convex block is away from the second through hole). Specific embodiments

[0024] The present invention provides a thermostatic valve. To make the purpose, technical solution and effects of the present invention clearer and more definite, the following further elaborates on the present invention with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Please refer to Figure 1 、 Figure 2 , the present invention provides a thermostatic valve, including a valve body 1 and a mixing chamber 2, a cold water chamber 3 and a hot water chamber 4 arranged on the valve body 1. The mixing chamber 2, the cold water chamber 3 and the hot water chamber 4 are all columnar hollow cavities. The cold water chamber 3 and the hot water chamber 4 are arranged on the same side and are separated from the mixing chamber 2 by a partition 5 arranged in the middle of the valve body. The partition 5 is provided with a first through hole 6 and a second through hole 7. The first through hole 6 communicates the mixing chamber 2 with the cold water chamber 3, and the second through hole 7 communicates the mixing chamber 2 with the hot water chamber 4. During operation, the cold water in the cold water chamber 3 enters the mixing chamber 2 through the first through hole 6, and the hot water in the hot water chamber 4 enters the mixing chamber 2 through the second through hole 7. The cold and hot water are fully mixed in the mixing chamber 2 to obtain warm water at a certain temperature.

[0026] Such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown in the figure, in the thermostatic valve with the above structure, a rotating shaft 8 is further included. One end of the rotating shaft 8 is connected to a driving motor 10 through a connecting member 9, and the other end passes through the cold water chamber 3 and the hot water chamber 4 and is rotatably fixed on the valve body 1. At a position corresponding to the first through hole 6 on the rotating shaft 8, a first valve core 11 is provided, and at a position corresponding to the second through hole 7, a second valve core 12 is provided. The side shapes of the first valve core 11 and the second valve core 12 match the first through hole 6 and the second through hole 7. When the rotating shaft 8 is rotated, the first valve core 11 and the second valve core 12 also rotate accordingly, and at the same time, the sizes of the connection between the first through hole 6 and the cold water chamber 3 and the connection between the second through hole 7 and the hot water chamber 4 change, so as to change the ratio of the hot water and cold water inflow in the mixing chamber 2 and obtain warm water at a set temperature. When the motor 10 drives the rotating shaft 8 to rotate, the first valve core 11 and the second valve core 12 rotate synchronously, and the hot water inflow and the cold water inflow in the mixing chamber 2 change inversely. That is, when the side of the first valve core 11 completely coincides with the first through hole 6, the side of the second valve core 12 just does not coincide with the second through hole 7 at all, as Figure 5 shown. At this time, the cold water chamber 3 is completely isolated from the mixing chamber 2, while the hot water chamber 4 is connected to the mixing chamber 2 to the greatest extent, so that the water temperature in the mixing chamber 2 reaches the maximum value; when the side of the second valve core 12 completely coincides with the second through hole 7, as Figure 4 shown, the second through hole is completely closed, and the side of the first valve core 11 does not overlap with the first through hole 6, and the first through hole is completely open. At this time, the hot water chamber 4 is closed, the cold water chamber 3 is connected to the mixing chamber 2 to the greatest extent, and the water temperature in the mixing chamber 2 reaches the lowest; correspondingly, when the first valve core 11 rotates to block half of the first through hole 6, the second valve core 12 just blocks half of the second through hole 7 as well. At this time, the water flowing into the mixing chamber 2 is half hot water and half cold water; therefore, by rotating the rotating shaft 8 and adjusting the overlapping area and ratio of the first valve core 11 and the second valve core 12 with the first through hole 6 and the second through hole 7 at the same time, any ratio of hot water and cold water can be obtained.

[0027] As Figure 3 、 Figure 4 、 Figure 5 shown, specifically, the first valve core 11 and the second valve core 12 are provided with gradually changing arc-shaped convex blocks 13. One end of the arc edge of the arc-shaped convex block is tangent to the circle of the valve core, and the other end protrudes, forming an arc-shaped convex block that gradually becomes larger from the tangent end, as Figure 3 、 Figure 4As shown in the figure. Correspondingly, the first through hole 6 and the second through hole 7 are respectively slot holes 14 that match the first valve core 11 and the second valve core 12. The structure of the slot hole 14 matches that of the arc-shaped convex block 13. When the first valve core 11 or the second valve core 12 rotates to a certain angle, the arc-shaped convex block 13 just seals the opening of the slot hole 14 tightly. The gradually changing arc-shaped convex block 13 structures provided on the first valve core 11 and the second valve core 12 can form a linearly gradually opening change when adjusting the flow areas of the first through hole 6 and the second through hole 7, so that the ratio of cold water to hot water changes linearly, and further the water temperature in the mixing chamber 2 can be more easily obtained by adjusting the ratio. Further, when the gradually changing arc-shaped convex blocks of the first valve core 11 and the second valve core 12 rotate to a certain angle, the arc-shaped convex blocks abut against the edges of the slot openings of the first through hole 6 and the second through hole 7, as Figure 5 shown, so that the rotating shaft cannot rotate, thereby restricting the rotation range of the rotating shaft.

[0028] Specifically, as Figure 2 shown, in the thermostatic valve with the above structure, a baffle 15 is further provided in the mixing chamber 2. The height of the baffle 15 is less than the internal height of the mixing chamber 2, so that a U-shaped water flow channel is formed in the mixing chamber. The baffle 15 provided in the mixing chamber 2 can extend the path of cold and hot water mixing, so that the cold and hot water are mixed more evenly and fully.

[0029] Specifically, as Figure 1 、 Figure 2 shown, in the thermostatic valve with the above structure, the thermostatic valve is further provided with a cold water joint 16, a hot water joint 17 and a warm water outlet 18 joint. The free ends of the cold water joint 16, the hot water joint 17 and the warm water outlet 18 are all threaded structures and can be threadedly connected to water pipes. The cold water joint 16 is connected to the cold water chamber 3 and the cold water source through a pipeline. The hot water joint 17 is connected to the hot water chamber 4 and the hot water source through a pipeline. The warm water outlet joint 18 is arranged in the mixing chamber 2 and is connected to the mixing chamber 2 and the switching valve through a pipeline. During operation, cold water passes through the cold water joint 16, flows through the cold water chamber 3, and enters the mixing chamber 2 through the first through hole 6. Hot water passes through the hot water joint 17, flows through the hot water chamber 4, and enters the mixing chamber 2 through the second through hole 7. The cold water and hot water are fully mixed in the U-shaped channel of the mixing chamber to obtain warm water at a certain temperature, and then flow out from the switching valve through the warm water outlet joint 18.

[0030] Specifically, as Figure 2 shown, in the thermostatic valve with the above structure, sealing gaskets 19 are provided at the connections of the cold water joint 16, the hot water joint 17 and the warm water outlet joint 18 to the valve body. The sealing gaskets 19 are rubber sealing gaskets, which have good sealing effects and can prevent water leakage at the connections of each joint to the valve body.

[0031] Specifically, as Figure 2As shown, in the thermostatic valve with the above structure, one-way valves 20 are provided in both the cold water joint 16 and the hot water joint 17. The one-way valves 20 open towards the cold water chamber 16 and the hot water chamber 17 to prevent the backflow or cross-flow of cold water and hot water when the water pressure is unbalanced.

[0032] Specifically, as Figure 2 shown, in the thermostatic valve with the above structure, a temperature sensor 21 is further provided near the warm water outlet of the mixing chamber. The temperature sensor 21 is used to detect the water temperature at the warm water outlet in real time, so as to facilitate the rotation shaft to adjust the ratio of cold water to hot water.

[0033] As Figure 3 shown, specifically, the thermostatic valve further includes a connecting member 9. One end of the connecting member 9 is connected to the motor 10, and the other end is connected to the rotation shaft 8. The connecting member 9 is also provided with a spool offset detection optocoupler 22. The spool offset detection optocoupler 22 is mainly used to position the rotation angle of the rotation shaft 8, so as to determine the rotation angles of the first spool 11 and the second spool 12, and further obtain the ratio of cold water to hot water in the mixing chamber 2.

[0034] Specifically, in the thermostatic valve with the above structure, a control unit (not shown in the drawings) is further provided. The control unit includes a control panel and a chip. The control panel is provided with a temperature setting button and a temperature display interface. The control unit is electrically connected to the drive motor 10 and the temperature sensor 21 respectively. During operation, first set the temperature according to actual needs through the control panel, open the switch valve, and the drive motor 10 rotates the rotation shaft according to the set water temperature and the spool position detected by the spool offset detection optocoupler 22, so as to adjust the communication area of the first through hole and the second through hole, and further adjust the ratio of cold water to hot water. When the water temperature reaches the set temperature, the drive motor stops driving, and the temperature sensor still detects the water temperature at the warm water outlet. When the temperature deviation is greater than plus or minus 1 degree of the set temperature, the motor starts for fine adjustment until the temperature is within plus or minus 1 degree of the set temperature.

[0035] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. A constant temperature valve, characterized in that, It includes a valve body, as well as a mixing chamber, a cold water chamber and a hot water chamber provided on the valve body. The cold water chamber and the hot water chamber are arranged on the same side and are separated from the mixing chamber by a partition plate arranged in the middle. The partition plate is provided with a first through hole connecting the mixing chamber and the cold water chamber, and a second through hole connecting the mixing chamber and the hot water chamber. The thermostatic valve further includes a rotating shaft. The rotating shaft passes through the cold water chamber and the hot water chamber, one end is connected to a driving motor through a provided connecting piece, and the other end is fixed on a mounting bracket provided on the valve body. And the rotating shaft is respectively provided with a first valve core and a second valve core at positions corresponding to the first through hole and the second through hole, which are respectively used to control the size of the connection between the first through hole and the second through hole and the cold water chamber and the hot water chamber; the first valve core and the second valve core are provided with arc-shaped bumps. One end of the arc edge of the arc-shaped bump is tangent to the circle of the valve core, and the other end protrudes, forming an arc-shaped bump that gradually becomes larger from the tangent end. The first through hole and the second through hole are respectively slot holes matching the arc-shaped bump structures provided on the first valve core and the second valve core. The gradually changing arc-shaped bump structures provided on the first valve core and the second valve core can form a linearly increasing change when adjusting the flow areas of the first through hole and the second through hole, so that the ratio of cold water to hot water changes linearly; when the gradually changing arc-shaped bumps of the first valve core and the second valve core rotate to a certain angle, the arc-shaped bumps abut against the edge of the slot opening of the first through hole or the second through hole, so that the rotating shaft cannot rotate, thereby restricting the rotation range of the rotating shaft.

2. The thermostatic valve according to claim 1, characterized in that, The mixing chamber is provided with a baffle, the height of the baffle is less than the inner height of the mixing chamber, and the baffle forms a U-shaped channel in the mixing chamber.

3. The thermostatic valve according to claim 1, characterized in that, The thermostatic valve is further provided with a connecting piece. One end of the connecting piece is connected to the motor, and the other end is connected to the rotating shaft. The connecting piece is also provided with a valve core offset detection optocoupler.

4. The thermostatic valve according to claim 1, characterized in that, The thermostatic valve is further provided with a cold water joint, a hot water joint and a warm water outlet joint. The cold water joint connects the cold water chamber and the cold water source through a pipeline, the hot water joint connects the hot water chamber and the hot water source through a pipeline, and the warm water outlet joint connects the mixing chamber and a switching valve through a pipeline.

5. The thermostatic valve according to claim 4, characterized in that, Sealing gaskets are provided at the connections of the cold water joint, the hot water joint and the warm water outlet joint with the valve body.

6. The thermostatic valve according to claim 4, characterized in that, Check valves are provided on both the cold water joint and the hot water joint.

7. The thermostatic valve according to claim 4, characterized in that, A temperature sensor is further provided near the warm water outlet joint of the mixing chamber.

8. The thermostatic valve according to any one of claims 1 to 7, characterized in that, The thermostatic valve is further provided with a control unit. The control unit includes a control panel and a control chip. The control panel is provided with a temperature setting button and a temperature display interface. The control unit is electrically connected to the driving motor, the temperature sensor and the valve core offset detection optocoupler respectively.

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