Valve assembly and valve core with precise temperature control

Abstract

The present invention discloses a valve plate assembly and a valve core capable of precise temperature adjustment. The valve plate assembly comprises a movable valve plate and a fixed valve plate, the fixed valve plate is provided with a cold water inlet, a hot water inlet and a mixed water outlet, the mixed water outlet is located in the middle of the fixed valve plate, the cold water inlet is located at the upper left end of the mixed water outlet, and the hot water inlet is located at the upper right end of the mixed water outlet, the lower surface of the movable valve plate is provided with a main connecting groove, the main connecting groove is located in the middle and upper part of the movable valve plate and is connected with the mixed water outlet, the fixed valve plate is also provided with a cold water replenishment port and / or a hot water replenishment port, the cold water replenishment port and the cold water inlet are on the same side of the mixed water outlet, the hot water replenishment port and the hot water inlet are on the other side of the mixed water outlet, the lower surface of the movable valve plate is also provided with a replenishment groove, the replenishment groove is located on the lower side of the main connecting groove, and the replenishment groove can simultaneously connect the cold water replenishment port, the hot water replenishment port and the mixed water outlet. The valve plate assembly and the valve core can accurately adjust the outlet water temperature within the fine-tuning area.

Description

Technical Field

[0001] The invention relates to a valve core, and in particular to a valve plate assembly and a valve core capable of accurately adjusting temperature. Background Art

[0002] At present, most valve cores use ceramic valve plate components to control the mixing ratio of cold and hot water when adjusting the outlet water temperature. As shown in the Chinese patent No. 2004201186654, a movable valve plate and a fixed valve plate are installed in the valve core, and the fixed valve plate is provided with a cold water inlet hole, a hot water inlet hole and an outlet hole. A connecting flow channel is provided on the movable valve plate, and one end of the connecting flow channel is always connected to the outlet hole. By adjusting the position of the connecting flow channel, the other end of the connecting flow channel can be connected to the cold water inlet hole and the hot water inlet hole at the same time or separately. The outlet water temperature can be controlled by adjusting the size of the overlapping area of ​​the connecting flow channel and the cold water inlet hole and the hot water inlet hole.

[0003] The existing thermostatic valve core has the following problems: 1. In the main thermostatic range, the corresponding rotation angle of the moving valve plate is small; 2. The valve core has poor restorability, and it is difficult to accurately adjust the outlet water temperature.

[0004] The main temperature adjustment range refers to the range of the outlet water temperature between T0-a℃~T0+a℃ (usually 38±~4℃ in actual use) corresponding to the angle of the moving valve disc during the movement of the moving valve disc, which is close to the human body temperature. The moving valve disc is most frequently adjusted within this range, and the water within this range is mostly used directly for showering, so the accuracy of the outlet water temperature is required to be high.

[0005] The existing valve core temperature control characteristic curve is as follows Figure 1 As shown in the figure (where the horizontal axis represents the rotation angle of the movable valve disc, and the vertical axis represents the outlet water temperature), the corresponding rotation angle of the movable valve disc in the main temperature adjustment range of the valve core is about 11°. The rotation angle of the movable valve disc is small. Every time the movable valve disc rotates a certain degree, the outlet water temperature of the mixed water will change significantly, resulting in poor temperature adjustment accuracy of the valve core in the main temperature adjustment range. This results in a large change in the outlet water temperature when the user slightly rotates the movable valve disc, and it is difficult for the user to fine-tune the outlet water temperature to achieve the desired outlet water temperature.

[0006] Resilience refers to the consistency of the outlet water temperature when the valve disc rotates forward and reversely to the same position. During the use of the valve core, there will be a difference in the outlet water temperature when the movable valve disc rotates forward (i.e., from low temperature to high temperature) to a certain position and when it rotates reversely (i.e., from high temperature to low temperature) to the same position. The larger the difference, the worse the valve core's resilience, and the smaller the difference, the better the valve core's resiliency.

[0007] like Figure 1As shown, in the main temperature adjustment range of the existing valve core, there is a large difference between the forward rotation and reverse rotation of the movable valve plate. If the user wants to adjust the outlet water temperature to a certain temperature, the user needs to repeatedly rotate the movable valve plate forward and reversely, which makes the adjustment difficult and inconvenient. Summary of the invention

[0008] In view of the shortcomings of the prior art, the first object of the present invention is to provide a valve plate assembly that can accurately adjust the temperature. By setting a water replenishment tank, the rotation angle of the movable valve plate from the full hot water outlet state and / or the full cold water outlet state to the main temperature adjustment range is reduced, thereby increasing the rotation angle occupied by the main temperature adjustment range without changing the total rotation angle of the movable valve plate, reducing the temperature rise of the movable valve plate when rotating in the main temperature adjustment range, and making the temperature adjustment of the valve core in the main temperature adjustment range more accurate.

[0009] The above-mentioned technical objective of the present invention is achieved through the following technical scheme: a valve plate assembly with precise temperature control, comprising a movable valve plate and a fixed valve plate which fit and rotate with each other, a cold water inlet, a hot water inlet and a mixed water outlet being arranged on the fixed valve plate, the mixed water outlet being located in the middle of the fixed valve plate, the cold water inlet being located at the upper left end of the mixed water outlet, the hot water inlet being located at the upper right end of the mixed water outlet, a main connecting groove being arranged on the lower surface of the movable valve plate, the main connecting groove being located in the middle and upper part of the movable valve plate and being connected with the mixed water outlet, a cold water replenishment port and / or a hot water replenishment port being further arranged on the fixed valve plate, the cold water replenishment port and the cold water inlet being located on the same side of the mixed water outlet, the hot water replenishment port and the hot water inlet being located on the other side of the mixed water outlet, a replenishment groove being further arranged on the lower surface of the movable valve plate, the replenishment groove being located on the lower side of the main connecting groove, the replenishment groove being able to simultaneously connect the cold water replenishment port, the hot water replenishment port and the mixed water outlet.

[0010] Through the above technical solution, when in use, the lower surface of the movable valve plate and the upper surface of the fixed valve plate are in contact, and relative rotation can occur between the two. When the fixed valve plate is provided with a cold water replenishment port and a hot water replenishment port, and the valve plate assembly is in a state of full hot water outlet, the main connecting groove is only connected to the cold water inlet, and the replenishment groove is only connected to the hot water replenishment port. When the valve plate assembly is in a state of full cold water outlet, the main connecting groove is only connected to the hot water inlet, and the replenishment groove is only connected to the cold water replenishment port.

[0011] When the valve plate assembly rotates from the full hot water outlet state to the main temperature adjustment interval, the flow area between the main connecting groove and the hot water inlet gradually decreases, and the flow area with the cold water inlet gradually increases. At the same time, the water replenishment groove gradually connects the cold water replenishment port and the mixed water outlet, and as the movable valve plate rotates, the flow area of ​​the water replenishment groove and the mixed water outlet gradually increases, and the amount of cold water inlet increases. Compared with the valve plate assembly without the water replenishment groove and the cold water replenishment port and the hot water replenishment port, when the movable valve plate rotates from the full cold water outlet state to the upper limit temperature of the main temperature adjustment interval, the angle required for the movable valve plate to rotate is smaller, making the range of the main temperature adjustment interval larger. Correspondingly, for every 1° rotation of the movable valve plate in the main temperature adjustment interval, the change in the mixed water outlet temperature is smaller, which is convenient for the precise adjustment of the outlet water temperature in the main temperature adjustment interval.

[0012] Correspondingly, when the moving valve plate rotates from the full cold water outlet state to the hot water outlet, the flow area of ​​the main connecting groove and the cold water inlet gradually decreases, and the flow area of ​​the hot water inlet gradually increases. At the same time, the water replenishment groove gradually connects the hot water replenishment port and the mixed water outlet, and as the moving valve plate rotates, the effective flow area of ​​the water replenishment groove and the mixed water outlet gradually increases, increasing the amount of hot water inflow. In this process, hot water enters the mixed water outlet through the water replenishment groove and the main connecting groove at the same time. Compared with not setting the water replenishment groove, the proportion of cold water in the mixed water increases faster as the rotating angle of the moving valve plate increases, so that the outlet temperature of the mixed water can reach the lower limit temperature of the main temperature adjustment range when the moving valve plate rotates a smaller angle. Without changing the total rotation angle of the moving valve plate, the angle at which the moving valve plate rotates from the full cold water state to the lower limit dimension of the main temperature control range becomes smaller, and the corresponding rotation angle of the main temperature control range will increase. On the whole, within the main temperature control range, the change in the outlet temperature of the mixed water decreases for every 1° rotation of the moving valve plate, that is, the temperature control accuracy within the main temperature control range is increased, which facilitates the user to accurately control the outlet water temperature.

[0013] When the movable valve plate rotates to the main temperature adjustment range, the water supply groove is connected to the hot water supply port and the cold water supply port at the same time. When the movable valve plate rotates toward the hot water inlet, the flow area of ​​the main connecting groove and the hot water inlet increases while the flow area of ​​the water supply groove and the hot water supply port decreases, thereby reducing the increase in the total flow area of ​​the hot water, making the change amplitude of the outlet water temperature with the rotation angle of the movable valve plate smaller, thereby improving the adjustment accuracy and facilitating the precise adjustment of the outlet water temperature.

[0014] Correspondingly, when the moving valve plate rotates toward the cold water inlet within the main temperature control range, the flow area between the hot water inlet and the main connecting groove decreases, and the flow area between the water replenishment groove and the hot water replenishment port increases, which can reduce the proportion of hot water in the mixed water output, so that the total proportion of hot water in the mixed water slows down as the moving valve plate rotates at a certain angle, thereby improving the temperature control accuracy and facilitating precise adjustment of the water outlet temperature.

[0015] In addition, the cold water supply port and the hot water supply port can be set separately, and the rotation angle from the full cold water outlet state to the lower limit temperature of the main temperature control range can be reduced separately, or the rotation angle from the full hot water outlet state to the upper limit temperature of the main temperature control range can be reduced separately, thereby increasing the range of the main temperature control range and improving the temperature control accuracy.

[0016] The positions of the cold water inlet and the hot water inlet can be interchanged. When the positions of the cold water inlet and the hot water inlet are interchanged, the positions of the cold water replenishment port and the hot water replenishment port are also interchanged. In the main temperature adjustment range, the mixed water outlet temperature decreases as the moving valve plate rotates. This is a qualitative change, not a quantitative change. The temperature change rate may increase or decrease at some points, but it does not affect the reduction of the overall temperature adjustment speed.

[0017] Preferably, the mixed water outlet includes a protrusion, which is located between the cold water replenishment port and the hot water replenishment port, and both ends of the water replenishment groove can simultaneously connect to the cold water replenishment port, the hot water replenishment port and the protrusion of the mixed water outlet.

[0018] Through the above technical solution, when the water replenishment groove rotates with the movable valve plate, the mixed water outlet can be connected through the protrusion, so that the water flow of the cold water replenishment port and / or the hot water replenishment port can enter the mixed water outlet through the auxiliary flow channel to achieve water replenishment. The water replenishment groove is connected to the cold water replenishment port, the hot water replenishment port and the mixed water outlet at the same time. When the rotation angle of the movable valve plate is within the main temperature adjustment range, when the movable valve plate rotates toward the cold water inlet, the water flow of the cold water replenishment port is reduced. When the movable valve plate rotates toward the hot water inlet, the water flow of the hot water replenishment port is reduced, thereby reducing the rate at which the proportion of cold water or hot water in the mixed water changes with the rotation angle of the movable valve plate, and improving the temperature adjustment accuracy.

[0019] Preferably, the water replenishment groove is arc-shaped.

[0020] Preferably, the water replenishment groove includes a water replenishment portion and a connecting portion, the connecting portion is located inside the water replenishment portion and extends toward the center of the movable valve plate, and the water replenishment portion can be connected to the cold water replenishment port and the hot water replenishment port at the same time.

[0021] Through the above technical solution, the cold water replenishment port and the hot water replenishment port can be connected to the mixed water outlet through the replenishment part and the connecting part to achieve water replenishment. The curvature of the water replenishment groove is greater than the curvature between the two adjacent ends of the cold water replenishment port and the hot water replenishment port, and the cold water replenishment port and the hot water replenishment port can be connected at the same time. When the rotation angle of the movable valve plate is within the main temperature adjustment range, when the movable valve plate rotates toward the cold water inlet, the water flow rate of the cold water replenishment port is reduced, and when the movable valve plate rotates toward the hot water inlet, the water flow rate of the hot water replenishment port is reduced, thereby reducing the rate at which the proportion of cold water or hot water in the mixed water changes with the rotation angle of the movable valve plate, thereby improving the temperature adjustment accuracy.

[0022] Preferably, the hot water inlet and the cold water inlet are arranged in an arc shape around the outside of the mixed water outlet, and the hot water replenishment port and the cold water replenishment port are arranged in an arc shape around the outside of the mixed water outlet.

[0023] Through the above technical solution, the overall structure of the valve plate is more compact, and when the movable valve plate rotates, the overlap area of ​​the main connecting groove and the hot water inlet and the cold water inlet changes relatively evenly, which is convenient for improving the adjustment accuracy. The hot water replenishment port and the cold water replenishment port are also arranged in this way, so that when the movable valve plate rotates, the overlap area of ​​the replenishment groove and the hot water replenishment port and the cold water replenishment port changes more evenly.

[0024] Preferably, the hot water inlet and the cold water inlet are symmetrical with respect to the symmetric plane of the mixed water outlet, the hot water replenishment port and the cold water replenishment port are symmetrical with respect to the symmetric plane of the mixed water outlet, and the replenishment groove is symmetrical with respect to the symmetric plane of the main connecting groove.

[0025] Through the above technical solution, through symmetrical arrangement, the temperature control curve of the valve plate assembly can be made symmetrical relative to the midpoint of the temperature control curve in the first half and the second half of the rotation of the movable valve plate, making the temperature control more regular and convenient for users to use.

[0026] Preferably, the fixed valve plate and the movable valve plate are circular, the outer diameter of the fixed valve plate is larger than the outer diameter of the movable valve plate, and the movable valve plate can slide on the fixed valve plate.

[0027] Through the above technical solution, the outlet water temperature can be adjusted by relative rotation between the movable valve plate and the fixed valve plate. At the same time, by sliding the fixed valve plate on the movable valve plate, the main connecting groove no longer connects the mixed water outlet with the hot water inlet and the cold water inlet, and the water replenishing groove no longer connects the mixed water outlet with the cold water replenishing port and the hot water replenishing port, thereby realizing the cutting off of the water flow.

[0028] Another object of the present invention is to provide a valve core that can accurately adjust the temperature, including a shell, a base, a control handle and a chuck, and also includes the above-mentioned valve plate assembly, the valve plate assembly is installed between the chuck and the base, the fixed valve plate and the base are circumferentially fixed, the movable valve plate and the chuck are circumferentially fixed, a seal is arranged between the fixed valve plate and the base, and a seal is arranged at the lower end of the base.

[0029] Through the above technical solution, the rotating angle of the movable valve plate of the valve core in the main temperature adjustment area can be large, and when the movable valve plate rotates in the main temperature adjustment area, the mixed water temperature changes slowly with the rotating angle of the movable valve plate, so that the user can quickly and accurately adjust the outlet water temperature in the main temperature adjustment area, so that the outlet water temperature of the mixed water meets the user's preference. The control handle and the chuck of the valve core can adopt an integrated structure, or can be separately set by means of clamping or the like.

[0030] Preferably, a rotating seat is sleeved on the outer side of the control handle, the rotating seat is rotatably installed on the upper end of the shell, the control handle is swingably arranged in the rotating seat, a slot is arranged on the upper end of the chuck, and the lower end of the control handle is in the slot.

[0031] According to the above technical solution, by pulling the handle, the movable valve plate can be driven to slide on the surface of the fixed valve plate to control the water output of the mixed water. By turning the handle, the rotating seat, the chuck and the movable valve plate can be driven to rotate, thereby adjusting the water output temperature of the mixed water.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows: a water replenishment groove and a hot water replenishment port and a cold water replenishment port are arranged, so that the speed of increasing or decreasing the mixed water outlet temperature is increased when the movable valve plate rotates toward the main temperature control area in a fully hot water outlet state or when the movable valve plate rotates toward the main temperature control area in a fully cold water outlet state, so that the mixed water outlet temperature reaches the human body comfortable temperature more quickly, and the rotation angle of the main temperature control range is increased while the total rotation angle of the movable valve plate remains unchanged.

[0033] After the water replenishment groove is set, when the movable valve plate is in the main temperature adjustment range, when the main connecting groove rotates toward the hot water inlet, the hot water flow area is increased, while the flow area of ​​the water replenishment groove and the hot water replenishment port is reduced; when the main connecting groove rotates toward the cold water inlet, the cold water flow area is increased, while the flow area of ​​the water replenishment groove and the cold water replenishment port is reduced. By setting the water replenishment groove and the cold water replenishment port and the hot water replenishment port, the mixed water outlet temperature can be made to change less with the rotation angle of the movable valve plate when the movable valve plate rotates in the main temperature adjustment range, and the water temperature adjustment accuracy is high, so that the user can accurately adjust the outlet water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the temperature regulation characteristic curve of the existing valve core;

[0035] Figure 2 is the temperature adjustment characteristic curve of the valve plate assembly in Example 1;

[0036] Figure 3 This is a schematic diagram of the upper surface structure of the fixed valve plate in Example 1;

[0037] Figure 4 This is a schematic diagram of the structure of the lower surface of the movable valve plate in the first embodiment;

[0038] Figure 5 This is a diagram of the matching position of the valve plate assembly in the first embodiment when it is in a state of full hot water discharge;

[0039] Figure 6 It is a schematic diagram of the matching position of the movable valve plate when it rotates from the full hot water state to the main temperature adjustment interval in the first embodiment;

[0040] Figure 7It is a schematic diagram of the matching position of the valve plate assembly in the first embodiment when it is in the main temperature adjustment range;

[0041] Figure 8 This is a diagram showing the matching position of the valve plate assembly in the first embodiment when it is in a full cold water outlet state;

[0042] Fig. 9 It is a schematic diagram of the matching position of the movable valve plate when it rotates from the full cold water outlet state to the main temperature adjustment zone in the first embodiment;

[0043] Fig.10 Schematic diagram of the matching position of the valve plate assembly in the first embodiment when the valve plate assembly is in a water flow cut-off state;

[0044] Fig.11 This is a schematic diagram of the upper surface structure of the fixed valve plate in the second embodiment;

[0045] Fig.12 This is a schematic diagram of the structure of the lower surface of the movable valve plate in the second embodiment;

[0046] Fig.13 This is a diagram showing the matching position of the valve plate assembly in the second embodiment when it is in a fully hot water outlet state;

[0047] Fig.14 It is a schematic diagram of the matching position of the movable valve plate when it rotates from the full hot water state to the main temperature adjustment interval in the second embodiment;

[0048] Fig.15 It is a schematic diagram of the matching position of the valve plate assembly in the second embodiment when it is in the main temperature adjustment range;

[0049] Fig.16 This is a diagram showing the matching position of the valve plate assembly in the second embodiment when it is in a full cold water outlet state;

[0050] Fig.17 It is a schematic diagram of the matching position of the movable valve plate when it rotates from the full cold water outlet state to the main temperature adjustment zone in the second embodiment;

[0051] Fig.18 It is a schematic diagram of the matching position of the valve plate assembly in the second embodiment when the valve plate assembly is in a water flow cut-off state;

[0052] Fig.19 It is a cross-sectional schematic diagram of embodiment 3.

[0053] Figure numerals: 1. moving valve plate; 2. fixed valve plate; 3. cold water inlet; 4. hot water inlet; 5. mixed water outlet; 6. main connecting groove; 7. hot water replenishing port; 8. cold water replenishing port; 9. replenishing groove; 10. protrusion; 11. replenishing part; 12. connecting part; 13. shell; 14. base; 15. control handle; 16. chuck; 17. rotating seat; 18. slot; 19. rotating shaft; 20. sealing member. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0055] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0056] Embodiment 1, a valve plate assembly capable of precise temperature adjustment,

[0057] like Figure 3 and Figure 4 As shown, a valve plate assembly capable of precise temperature adjustment comprises a movable valve plate 1 and a fixed valve plate 2, wherein the upper surface of the fixed valve plate 2 is provided with a cold water inlet 3, a hot water inlet 4 and a mixed water outlet 5. The mixed water outlet 5 is located in the middle of the upper surface of the fixed valve plate 2, and the hot water inlet 4 and the cold water inlet 3 are respectively located on the upper right and upper left sides of the mixed water outlet 5. A cold water replenishment port 8 is provided on the lower left side of the mixed water outlet 5, and a hot water replenishment port 7 is provided on the lower right side of the mixed water outlet 5. During use, the hot water inlet 4 and the hot water replenishment port 7 are both connected to the hot water supply pipe, and the cold water inlet 3 and the cold water replenishment port 8 are both connected to the cold water supply pipe. The cold water inlet 13, the cold water replenishment port 8, the hot water inlet 4 and the hot water replenishment port 7 are all annular, surrounding the outside of the mixed water outlet 5. The left and right sides of the mixed water outlet 5 are symmetrical, the cold water inlet 3 and the hot water inlet 4 are symmetrical relative to the symmetric plane of the mixed water outlet 5, and the cold water replenishment port 8 and the hot water replenishment port 7 are symmetrical relative to the symmetric plane of the mixed water outlet 5. The mixed water outlet 5 also includes a protrusion 10, and the protrusion 10 is located between the cold water replenishment port 8 and the hot water replenishment port 7.

[0058] The lower surface of the movable valve plate 1 is provided with a main connecting groove 6 and a water replenishing groove 9. The main connecting groove 6 is located in the middle and upper part of the lower surface of the movable valve plate 1, and the water replenishing groove 9 is located on the lower side of the main connecting groove 6, and the water replenishing groove 9 is also in an arc shape. The left and right sides of the main connecting groove 6 are symmetrically arranged, and the left and right sides of the water replenishing groove 9 are symmetrical relative to the symmetric plane of the main connecting groove 6. The curvature of the water replenishing groove 9 is greater than the curvature between the adjacent ends of the cold water replenishing port 8 and the hot water replenishing port 7.

[0059] When the valve plate assembly is working, the lower surface of the movable valve plate 1 and the upper surface of the fixed valve plate 2 are in contact with each other, and relative rotation can occur between the two.

[0060] like Figure 5As shown, the solid lines are used to indicate the positions of the various features on the upper surface of the fixed valve disc 2, and the dotted lines are used to indicate the positions of the various features on the lower surface of the movable valve disc 1. At this time, the valve disc assembly is in a state of full hot water outlet, the main connecting groove 6 is connected to the hot water inlet and the mixed water outlet 5, the water replenishment groove 9 is only connected to the cold water replenishment port 8, and is not connected to the mixed water outlet 5, and the valve core is in a state of full hot water outlet.

[0061] When the movable valve plate 1 rotates from the full hot water outlet state to the cold water inlet 3, Figure 6 As shown, at this time, the left side of the main connecting groove 6 is connected to the cold water inlet 3, and the water replenishment groove 9 is connected to the cold water replenishment port 8 and the protrusion 10 of the mixed water outlet 5, and the cold water enters the mixed water outlet 5 from the two waterways at the same time. Compared with the valve plate assembly without the water replenishment groove 9, the proportion of cold water in the mixed water increases faster as the rotation angle of the movable valve plate 1 increases. Correspondingly, in the process of the movable valve plate 1 rotating from the full hot water outlet state to the upper limit temperature of the main temperature adjustment interval, the movable valve plate 1 only needs to rotate a smaller angle to reduce the temperature of the mixed water to the upper limit temperature of the main temperature adjustment interval (i.e., T0+a℃). The rotation angle of the movable valve plate 1 in this process becomes smaller, and the corresponding rotation angle of the valve plate assembly in the main temperature adjustment interval can be increased.

[0062] When the movable valve plate 1 rotates to the main temperature adjustment range, the water supply groove 9 is connected to the cold water supply port 8 and the hot water supply port 7 at the same time. Figure 7 As shown, A1 is the flow area between the main connecting groove 6 and the cold water inlet 3, A2 is the flow area between the main connecting groove 6 and the hot water inlet 4, A3 is the flow area between the water replenishment groove 9 and the cold water replenishment port 8, and A4 is the flow area between the water replenishment groove 9 and the hot water replenishment port 7. When the main connecting groove 6 on the movable valve plate 1 rotates toward the cold water inlet 3 in the main temperature adjustment range, A1 increases while A3 decreases, and A2 decreases while A4 increases. Compared with the valve plate assembly without the water replenishment groove 9, the hot water replenishment port 7 and the cold water replenishment port 8, when the movable valve plate 1 rotates, the proportion of cold water in the mixed water decreases with the change in the rotation angle of the movable valve plate 1, so that the temperature change value of the mixed water decreases for every 1° rotation of the movable valve plate 1, thereby increasing the temperature adjustment accuracy and facilitating the user to accurately adjust the outlet water temperature. The corresponding movable valve plate 1 can also achieve this effect when it rotates toward the hot water inlet 4 in the main temperature adjustment range, so that the temperature adjustment when the movable valve plate 1 is rotated can be more accurate.

[0063] Figure 8 The valve plate assembly is in a state of full cold water outlet. At this time, the main connecting groove 6 is only connected to the cold water inlet 3 and the mixed water outlet 5, and the water replenishment groove 9 is only connected to the hot water replenishment port 7, and the valve plate assembly is in a state of full cold water outlet.

[0064] When the moving valve plate 1 rotates from the full cold water outlet state to the main temperature adjustment zone direction, Fig. 9As shown, the right side of the main connecting groove 6 is connected to the hot water inlet 4, and the water replenishing groove 9 can also be connected to the protrusion 10 of the mixed water outlet 5, so that the hot water can enter the mixed water outlet 5 through the two water channels at the same time, thereby increasing the flow rate of the hot water, reducing the rotation angle required for the movable valve plate 1 to rotate from the full cold water outlet state to the lower limit temperature of the main temperature adjustment range, and increasing the rotation angle of the main temperature adjustment range.

[0065] It should be noted that when the movable valve plate 1 rotates from the full cold water outlet state to the main temperature adjustment interval, the water replenishment groove 9 and the main connecting groove 6 can be connected to the hot water replenishment port 7 and the hot water inlet 4 respectively at the same time, or one of them can be connected first and the other can be connected later. When the movable valve plate 1 rotates from the full hot water outlet state to the main temperature adjustment interval, the water replenishment groove 9 and the main connecting groove 6 can be connected to the cold water replenishment port 8 and the cold water inlet 3 respectively at the same time, or one of them can be connected first and the other can be connected later.

[0066] Figure 2 This is the actual temperature control curve of the valve plate assembly. At this time, the cold water inlet temperature is approximately 15°C, and the hot water inlet temperature is approximately 64°C. When the movable valve plate rotates at an angle of 26°, the mixed water outlet temperature is approximately 34°C, reaching the lower limit temperature of the main temperature control range. When the movable valve plate rotates at an angle of 58 degrees, the mixed water outlet temperature is approximately 42°C, reaching the upper limit temperature of the main temperature control range. The movable valve plate rotation angle corresponding to the main temperature control range is approximately 32°, which is much larger than the existing valve core. For different inlet water temperatures, the movable valve plate rotation angles corresponding to the upper and lower limit temperatures of the main temperature control range are also different, but they will not change too much. For this valve plate assembly, it can basically ensure that the main temperature control range is approximately 30°.

[0067] contrast Figure 1 and Figure 2 It can be seen that Figure 2 The rotation angle of the movable valve plate corresponding to the middle main temperature adjustment interval is much larger than the rotation angle of the movable valve plate corresponding to the main temperature adjustment interval of the existing valve core. Figure 2 In the main temperature adjustment range, the outlet water temperature rise corresponding to the same angle of the moving valve is small, which is convenient for users to accurately adjust the outlet water temperature. Figure 2 The slope of the temperature adjustment curve from the full cold water state to the lower limit temperature of the main temperature adjustment range is greater than Figure 1 The slope of the temperature control curve in this section is Figure 2 The slope of the temperature adjustment curve from the full hot water state to the upper limit temperature of the main temperature adjustment range is greater than Figure 1 The slope of the temperature adjustment curve in this section. Figure 1 and Figure 2 The difference between the two temperature adjustment curves at the same angle in the main temperature adjustment area shows that Figure 2The valve plate assembly has better restoration performance within the main temperature adjustment range, and the difference in water outlet temperature is smaller when the movable valve plate rotates forward and reverse to the same position.

[0068] In addition, in order to make the valve plate assembly have a cutting function, the outer diameter of the fixed valve plate 2 is made larger than the outer diameter of the movable valve plate 1. When the water flow needs to be cut off, Fig.10 As shown, the movable valve plate 1 can be slid toward the fixed valve plate 2 so that the main connecting groove 6 is no longer connected to the hot water inlet 4 and the cold water inlet 3 , and the water replenishing groove 9 is no longer connected to the protrusion 10 .

[0069] Embodiment 2: A valve plate assembly capable of precise temperature adjustment

[0070] like Fig.11 and Fig.12 As shown, a valve plate assembly capable of precise temperature adjustment is provided on the upper surface of the fixed valve plate 2 with a cold water inlet 3, a hot water inlet 4, a cold water replenishment port 8, a hot water replenishment port 7 and a mixed water outlet 5. The mixed water outlet 5 is located in the middle of the fixed valve plate 2, the hot water inlet 4 is located on the upper right side of the mixed water outlet 5, and the cold water inlet 3 is located on the upper left side of the mixed water outlet 5. The hot water replenishment port 7 is located on the lower right side of the mixed water outlet 5, and the cold water replenishment port 8 is located on the lower left side of the mixed water outlet 5. The hot water inlet 4, the hot water replenishment port 7, the cold water inlet 3 and the cold water replenishment port 8 are arranged in an arc shape around the outside of the mixed water outlet 5. The cold water inlet 3 and the hot water inlet 4 are symmetrically arranged relative to the mixed water outlet 5, and the hot water replenishment port 7 and the cold water replenishment port 8 are symmetrically arranged relative to the mixed water outlet 5.

[0071] The lower surface of the movable valve plate 1 is provided with a main connecting groove 6 and a water replenishing groove 9. The main connecting groove 6 is located in the upper middle part of the movable valve plate 1, and the water replenishing groove 9 is located on the lower side of the main connecting groove 6. The water replenishing groove 9 includes a water replenishing portion 11 and a connecting portion 12. The connecting portion 12 is located inside the water replenishing portion 11 and extends toward the center of the movable valve plate 1. The left and right sides of the water replenishing groove 9 are symmetrical with respect to the symmetric plane of the main connecting groove 6. The curvature of the water replenishing portion 11 is greater than the curvature between the adjacent ends of the cold water replenishing port 8 and the hot water replenishing port 7.

[0072] like Fig.13 , 14 as well as Fig.16 , 17 As shown, when the valve plate assembly is in the full hot water outlet state and the full cold water outlet state, and when the full hot water outlet state rotates toward the main temperature adjustment interval, the working process of the full cold water outlet state is the same as that of the state of embodiment 1.

[0073] like Fig.15As shown, at this time, the movable valve plate 1 is in the main temperature adjustment range. At this time, the flow area between the main connecting groove 6 and the cold water inlet 3 is A1, the flow area between the main connecting groove 6 and the hot water inlet 4 is A2, the flow area between the water replenishment groove 9 and the cold water replenishment port 8 is A3, and the flow area between the water replenishment groove 9 and the hot water replenishment port 7 is A4. When the movable valve plate 1 continues to rotate toward the cold water inlet 3, A1 increases, A3 remains unchanged, A2 decreases, and A4 increases. Compared with the ordinary valve plate assembly without the water replenishment groove 9, the cold water proportion in the mixed water decreases with the change speed of the rotating angle of the movable valve plate 1, and the change speed of the outlet water temperature of the mixed water decreases, thereby improving the temperature adjustment accuracy of the movable valve plate 1 in the main temperature adjustment range, which is convenient for accurate adjustment of the outlet water temperature. Correspondingly, when the movable valve plate 1 rotates from this position toward the hot water inlet 4, A2 increases while A4 decreases, and A1 decreases while A3 remains unchanged. Compared with an ordinary valve plate assembly without a water replenishment groove 9, the proportion of the total flow area of ​​hot water decreases with the change in the rotation angle of the movable valve plate 1, so that the speed at which the outlet water temperature of the mixed water changes with the rotation angle of the movable valve plate 1 is reduced, which facilitates precise adjustment of the outlet water temperature.

[0074] like Fig.18 As shown, when it is necessary to cut off the water flow of the valve plate assembly, the outer diameter of the fixed valve plate 2 can be made larger than the outer diameter of the movable valve plate 1. When cutting off, just slide the movable valve plate 1 to the lower side of the fixed valve plate 2 so that the main connecting groove 6 is no longer connected to the cold water inlet 3 and the hot water inlet 4, and at the same time, the water replenishment groove 9 is no longer connected to the mixed water outlet 5 and the cold water replenishment port 8 and the hot water replenishment port 7, so that the valve plate assembly can be in a cut-off state.

[0075] The temperature regulation characteristic curve of the valve plate assembly is almost the same as the temperature regulation characteristic curve of the valve plate assembly in the first embodiment. Figure 2 It can be seen that the main temperature adjustment range of the valve plate assembly (the rotation angle corresponding to T0-a~T0+a) is much larger than the temperature adjustment range of the existing valve plate assembly, and within the main temperature adjustment range, the water outlet temperature changes less with the rotation of the movable valve plate 1. The difference in water outlet temperature at the same angle is smaller when the valve plate rotates forward and reverse, and the overall restoration of the valve plate is better.

[0076] Embodiment 3: A valve core capable of precise temperature adjustment

[0077] like Fig.19As shown, a valve core capable of precise temperature adjustment includes the valve plate assembly in the first or second embodiment, and further includes a housing 13, a base 14, a control handle 15, a rotating seat 17 and a chuck 16. The rotating seat 17 is rotatably mounted on the upper end of the housing 13, and the control handle 15 is swingably mounted in the rotating seat 17. The control handle 15 and the rotating seat 17 are connected by a rotating shaft 19, so that both ends of the control handle 15 can swing. The chuck 16, the movable valve plate 1 and the fixed valve plate 2 are mounted in the housing 13. The fixed valve plate 2 is fixed on the base 14, and a seal 20 is installed between the fixed valve plate 2 and the base 14. The seal 20 is also installed at the lower end of the base 14. A card block is provided on the base 14, and the card block is inserted into the groove at the edge of the fixed valve plate 2. The lower surface of the movable valve plate 1 is in contact with the upper surface of the fixed valve plate 2. A groove is also provided on the upper edge of the movable valve plate 1, and a card tooth matching the groove on the movable valve plate 1 is provided on the chuck 16, and the card tooth is inserted into the groove. The chuck 16 is also provided with a slot 18, into which the lower end of the control handle 15 is inserted. When the control handle 15 swings, the lower end of the control handle 15 drives the movable valve disc 1 to swing on the upper surface of the fixed valve disc 2 through the chuck 16. When the control handle 15 is rotated, the control handle 15 drives the movable valve disc 1 to rotate together through the chuck 16. The structures of the rotating seat 17, the control handle 15, the chuck 16, etc. are prior arts and are widely used on existing single-handle valve cores. The specific structures will not be elaborated in detail here.

[0078] In addition, if only the outlet water temperature needs to be adjusted and there is no need to adjust the outlet water flow rate, the rotating seat 17 can be omitted, and the control handle 15 can be rotatably installed on the upper end of the shell 13. The control handle 15 and the chuck 16 are separately or integrally arranged, so that the valve plate 1 is driven to rotate through the chuck 16.

[0079] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A valve plate assembly capable of precise temperature adjustment, comprising a movable valve plate (1) and a fixed valve plate (2) which rotate in contact with each other, the fixed valve plate (2) being provided with a cold water inlet (3), a hot water inlet (4) and a mixed water outlet (5), the mixed water outlet (5) being located in the middle of the fixed valve plate (2), the cold water inlet (3) being located at the upper left end of the mixed water outlet (5), the hot water inlet (4) being located at the upper right end of the mixed water outlet (5), the lower surface of the movable valve plate (1) being provided with a main connecting groove (6), the main connecting groove (6) being located at the upper middle part of the movable valve plate (1) and being connected with the mixed water outlet (5), wherein: The fixed valve plate (2) is also provided with a cold water replenishment port (8) and a hot water replenishment port (7); the cold water replenishment port (8) and the cold water inlet (3) are located on the same side of the mixed water outlet (5); the hot water replenishment port (7) and the hot water inlet (4) are located on the other side of the mixed water outlet (5); the lower surface of the movable valve plate (1) is also provided with a replenishment groove (9); the replenishment groove (9) is located on the lower side of the main connecting groove (6); the replenishment groove (9) can simultaneously connect the cold water replenishment port (8), the hot water replenishment port (7) and the mixed water outlet (5); the mixed water outlet (5) includes a protrusion (10); the protrusion (10) is located between the cold water replenishment port (8) and the hot water replenishment port (7); Alternatively, the water replenishment groove (9) comprises a water replenishment portion (11) and a connecting portion (12), the connecting portion (12) being located inside the water replenishment portion (11) and extending towards the center of the movable valve plate (1), the left and right sides of the water replenishment groove (9) being symmetrical with respect to the symmetric plane of the main connecting groove (6), and the curvature of the water replenishment portion (11) being greater than the curvature between the adjacent ends of the cold water replenishment port (8) and the hot water replenishment port (7).

2. The valve plate assembly capable of precise temperature adjustment according to claim 1, characterized in that: The water replenishment groove (9) is in an arc shape.

3. The valve plate assembly capable of precise temperature adjustment according to claim 1, characterized in that: The hot water inlet (4) and the cold water inlet (3) are arranged in an arc shape around the outside of the mixed water outlet (5), and the hot water replenishment port (7) and the cold water replenishment port (8) are arranged in an arc shape around the outside of the mixed water outlet (5).

4. The valve plate assembly capable of precise temperature adjustment according to claim 1, characterized in that: The hot water inlet (4) and the cold water inlet (3) are symmetrical with respect to the symmetric plane of the mixed water outlet (5), the hot water replenishment port (7) and the cold water replenishment port (8) are symmetrical with respect to the symmetric plane of the mixed water outlet (5), and the replenishment groove (9) is symmetrical with respect to the symmetric plane of the main connecting groove (6).

5. The valve plate assembly capable of precise temperature adjustment according to claim 1, characterized in that: The fixed valve plate (2) and the movable valve plate (1) are circular, the outer diameter of the fixed valve plate (2) is larger than the outer diameter of the movable valve plate (1), and the movable valve plate (1) can slide on the fixed valve plate (2).

6. A valve core capable of precise temperature adjustment, comprising a housing (13), a base (14), a control handle (15) and a chuck (16), characterized in that: It also includes the valve plate assembly described in any one of claims 1 to 5, the valve plate assembly is installed between the chuck (16) and the base (14), the fixed valve plate (2) and the base (14) are circumferentially fixed, the movable valve plate (1) and the chuck (16) are circumferentially fixed, a seal (20) is provided between the fixed valve plate (2) and the base (14), and a seal (20) is provided at the lower end of the base (14).

7. The valve core capable of precise temperature adjustment according to claim 6, characterized in that: A rotating seat (17) is sleeved on the outer side of the control handle (15), the rotating seat (17) is rotatably mounted on the upper end of the housing (13), the control handle (15) is swingably arranged in the rotating seat (17), a clamping groove (18) is arranged on the upper end of the chuck (16), and the lower end of the control handle (15) is located in the clamping groove (18).

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