tempering valve

Abstract

This utility model belongs to the technical field of control valves for drinking water equipment, and specifically relates to a temperature regulating valve. The temperature regulating valve of this utility model includes a valve body, a valve core, an electronic control device, a temperature sensor, and a fixed actuator relative to the valve body; the actuator and temperature sensor are electrically connected to the electronic control device; the valve body is provided with a hot water inlet, a hot water valve port, a cold water inlet, a cold water valve port, a mixed water outlet, and a mixing chamber; the hot water inlet is connected to the cold water inlet, the cold water inlet is connected to the cold water valve port, and the mixed water outlet is connected to the mixing chamber; the area of ​​the overlapping portion of the rotating core valve port and the hot water valve port is equal to the area of ​​the overlapping portion of the rotating core valve port and the cold water valve port; one of the hot water valve port and the cold water valve port is completely located within the rotating core valve port, and the other is completely offset from the rotating core valve port. This utility model can automatically adjust the hot water opening degree to quickly bring the outlet water temperature close to or equal to the set temperature, making it convenient to use.

Description

Technical Field

[0001] This utility model belongs to the technical field of control valves for drinking water equipment, and particularly relates to temperature control valves. Background Technology

[0002] One type of traditional temperature control valve includes a valve body, a valve core, and a motor fixed relative to the valve body; the valve core includes a rotating core and a fixed core, and the motor drives the rotating core to rotate to achieve temperature control.

[0003] Traditional thermostatic valves use a motor to rotate the core, which then becomes fixed. The flow rates of hot and cold water are also fixed, requiring a relatively long time to obtain the mixed water at the set temperature. Utility Model Content

[0004] One objective of this invention is to solve or alleviate the aforementioned technical problems.

[0005] The present invention employs a temperature control valve, comprising a valve body, a valve core, an electronic control device, a temperature sensor, and a fixed servo motor relative to the valve body; the servo motor and the temperature sensor are electrically connected to the electronic control device; the valve body is provided with a hot water inlet, a hot water valve port, a cold water inlet, a cold water valve port, a mixed water outlet, and a mixing chamber; the hot water inlet is connected to the cold water inlet, the cold water inlet is connected to the cold water valve port, and the mixed water outlet is connected to the mixing chamber; the temperature sensor is located within the mixing chamber; the valve core includes a rotating core, and the fixed core is provided with a hot water valve port and a cold water outlet with the same cross-section as the hot water valve port. The rotating core is equipped with a rotating core valve port; the fixed core is fixed inside the mixing chamber, the rotating core is in contact with the fixed core and connected to the rotating output end of the servo motor; the rotating core valve port is a fan-shaped ring with the rotating output end of the servo motor when viewed from below, and the fan-shaped ring of the rotating core valve port is set to enable the rotating core valve port to achieve the following two states: the area of ​​the overlapping part of the rotating core valve port and the hot water valve port is equal to the area of ​​the overlapping part of the rotating core valve port and the cold water valve port; one of the hot water valve port and the cold water valve port is completely located inside the rotating core valve port, and the other is completely misaligned with the rotating core valve port.

[0006] The effect achieved by this invention is that it can automatically adjust the hot water opening degree K to quickly bring the outlet water temperature t close to or equal to the set temperature T, making it easy to use.

[0007] In a further technical solution, the valve core also includes a fixed core body, with the hot water valve port and the cold water valve port respectively disposed on the fixed core body; the valve body includes an upper outer shell and a lower outer shell threadedly connected to the upper outer shell; the fixed core body is provided with an anti-rotation protrusion embedded in the inner wall of the upper outer shell along the axis of the threaded connection between the upper and lower outer shells, and the lower outer shell, the rotating core valve port, and the fixed core body abut against each other in sequence.

[0008] This technical solution allows for the convenient assembly of temperature control valves.

[0009] A further technical solution also includes a water mixing spiral component located inside the mixing chamber, with a temperature sensor located below the water mixing spiral component.

[0010] This technical solution ensures that hot and cold water are fully mixed in the mixing chamber, and ensures that the temperature of the mixed water measured by the temperature sensor is accurate.

[0011] A further technical solution involves a positioning boss fixedly installed on the lower outer shell, which abuts against the mixing spiral component, and a temperature sensor extending into the mixing chamber from the side wall of the positioning boss.

[0012] This technical solution facilitates the assembly of temperature control valves.

[0013] A further technical solution involves providing a top gap between the top of the mixing spiral component and the rotating core.

[0014] This technical solution ensures that hot and cold water are fully mixed in the mixing chamber, and ensures that the temperature of the mixed water measured by the temperature sensor is accurate.

[0015] In a further technical solution, both the fixed core and the rotating core are made of ceramic.

[0016] This technical solution ensures the sealing of the contact area between the fixed core and the rotating core.

[0017] A further technical solution includes a valve core with a through hole, the sealing element being located between the upper outer shell and the fixed core, with the through hole facing the hot water valve port and the cold water valve port respectively.

[0018] Further technical solutions also include a snap ring and a connecting shaft with a snap ring groove. One end of the connecting shaft is inserted into the rotating core, and the other end extends out from the upper housing and is fixedly connected to the output end of the servo motor. The snap ring groove is exposed from the upper housing, and the snap ring is inserted into the snap ring groove.

[0019] This technical solution facilitates the assembly of temperature control valves. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a temperature control valve according to an embodiment of this utility model; the dashed lines represent conductive lines.

[0021] Figure 2 This is a three-dimensional exploded view of the temperature control valve according to an embodiment of the present invention.

[0022] Figure 3 This is a half-sectional schematic diagram of the temperature control valve according to an embodiment of the present invention.

[0023] Figure 4 This is a bottom view of the temperature control valve according to an embodiment of the present invention. Figure 1The mixing spiral component 132, the lower housing 19, and the temperature sensor 82 are not shown; the hot water opening degree is 0%, and the cold water opening degree is 100%.

[0024] Figure 5 This is a bottom view of the temperature control valve according to an embodiment of the present invention. Figure 2 The mixing spiral component 132, the lower housing 19, and the temperature sensor 82 are not shown; the hot water opening degree is 50%, and the cold water opening degree is 50%.

[0025] Figure 6 This is a bottom view of the temperature control valve according to an embodiment of the present invention. Figure 3 The mixing spiral component 132, the lower housing 19, and the temperature sensor 82 are not shown; the hot water opening degree is 100%, and the cold water opening degree is 0%.

[0026] The accompanying drawings in the specification that best illustrate the technical features of this utility model are: Figure 3 .

[0027] Valve body 1; hot water inlet 11; cold water inlet 12; mixed water outlet 13; mixing chamber 131; mixing spiral 132; positioning boss 133; top clearance 134; upper outer shell 18; lower outer shell 19; valve core 2; fixed core 21; hot water valve port 211; cold water valve port 212; anti-rotation protrusion 219; rotating core 22; rotating core valve port 221; seal 23; through hole 231; connecting shaft 29; snap ring groove 291; snap ring 292; electronic control device 8; servo motor 81; temperature sensor 82. Detailed Implementation

[0028] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0029] As a specific embodiment, the temperature control valve of this utility model includes a valve body 1, a valve core 2, an electronic control device 8, a temperature sensor 82, and a servo motor 81 fixed relative to the valve body 1.

[0030] The servo motor 81 and temperature sensor 82 are electrically connected to the electronic control device 8. The electronic control device 8 is a device used in the prior art for implementing electronic control, such as a PLC or a circuit board including a microcontroller. It is easy to understand that the servo motor 81, under the control of the electronic control device 8, can rotate a specified angle through its output. The temperature sensor 82 is used to detect the water temperature in the mixing chamber 131 (described later) and transmit this information to the electronic control device 8.

[0031] The valve body 1 is provided with a hot water inlet 11, a hot water valve port 211, a cold water inlet 12, a cold water valve port 212, a mixed water outlet 13, and a mixing chamber 131.

[0032] Hot water inlet 11 is connected to cold water inlet 12, cold water inlet 12 is connected to cold water valve port 212, and mixed water outlet 13 is connected to mixing chamber 131. Figure 3 As shown, the hot water inlet 11 and cold water inlet 12 are both horizontally arranged, while the mixing chamber 131 and the mixed water outlet 13 are vertically arranged, making the hot water inlet 11, cold water inlet 12, mixed water outlet 13, and mixing chamber 131 as a whole T-shaped arrangement. The hot water valve port 211 can be formed by the fixing core 21 described later, or it can be a hole opened on the valve body 1; the same applies to the cold water valve port 212.

[0033] Temperature sensor 82 is located within mixing chamber 131.

[0034] The valve core 2 includes a rotating core 22 and a fixed core 21, which is provided with a hot water valve port 211 and a cold water valve port 212 with the same cross section as the hot water valve port 211; the rotating core 22 is provided with a rotating core valve port 221; the fixed core 21 is fixed in the mixing chamber 131, and the rotating core 22 is attached to the fixed core 21 and connected to the rotation output end of the servo motor 81.

[0035] The rotary valve port 221 is a ring-shaped sector that is coaxial with the rotation output end of the servo motor 81 when viewed from below. The ring-shaped sector of the rotary valve port 221 is configured to enable the rotary valve port 221 to achieve the following two states:

[0036] like Figure 5 As shown, the area of ​​the overlapping part of the rotating core valve port 221 and the hot water valve port 211 is equal to the area of ​​the overlapping part of the rotating core valve port 221 and the cold water valve port 212; at this time, the hot water opening degree is 50% and the cold water opening degree is 50%.

[0037] like Figure 4 , 6 As shown, in the state where one of the hot water valve port 211 and the cold water valve port 212 is completely located inside the rotating core valve port 221, and the other is completely misaligned with the rotating core valve port 221, the hot water opening degree is 0% and the cold water opening degree is 100%, or the hot water opening degree is 100% and the cold water opening degree is 0%.

[0038] It is easy to understand that although the rotary valve port 221 cannot simultaneously achieve the two states mentioned above, both states must be achievable. The sum of the hot water opening degree and the cold water opening degree is 100%, in other words, the hot water opening degree is 100% minus the difference between the hot water opening degree and the cold water opening degree.

[0039] The working principle is as follows: T is the set temperature, which is usually input into the electronic control device 8 through input devices such as touch screens and stored in the electronic control device 8.

[0040] t is the outlet water temperature, which is the water temperature in the mixing chamber 131 measured by temperature sensor 82. Since temperature sensor 82 is relatively close to the mixed water outlet 13, its temperature is basically the same as the temperature of the mixed water output by the mixed water outlet 13.

[0041] K represents the hot water opening degree. As mentioned earlier, the hot water opening degree is 100%, meaning the hot water valve 211 is fully open, and the cold water opening degree is 0%, meaning the hot water valve 211 is fully closed, and vice versa.

[0042] Before use, connect the hot water inlet 11 to the hot water source and the cold water inlet 12 to the cold water source. It's easy to understand that the hot water temperature is higher than the cold water temperature; typically, hot water is close to the boiling point of water (95°C), and cold water is close to room temperature, such as 25°C. Both the hot water source and the cold water source are capable of outputting water with stable flow rates and temperatures using existing technology.

[0043] Initially, the hot water opening degree K is set to 50%.

[0044] Then, the hot water opening degree K is adjusted by the electronic control device 8 in the following manner: K n =K n-1 +A*(Tt n )+B*∫(Tt n )dt, where coefficient A is 2% / ℃ or a value with a fluctuation of plus or minus 30% based on this value; coefficient B is 0.02% / (℃*s) or a value with a fluctuation of plus or minus 30% based on this value; the subscript n indicates the number of times the hot water opening degree K is adjusted (the hot water opening degree K is adjusted at fixed time intervals, such as adjusting it every 1 second, etc.), for example, the hot water opening degree K is marked as K1, K n-1 K0 is the initial 50% hot water opening degree K, and so on.

[0045] The temperature control valve of this invention, by adjusting the hot water opening degree K in the manner described above, initially mixes cold and hot water at maximum flow rate, then rapidly adjusts the hot water opening degree K until the outlet water temperature t equals the set temperature T. At this point, the hot water opening degree K is essentially maintained, thus maintaining the outlet water temperature t as well. As can be seen from the above, the temperature control valve of this invention can automatically adjust the hot water opening degree K to quickly bring the outlet water temperature t close to or equal to the set temperature T, reducing user waiting time and making it easier to use.

[0046] As one specific implementation, the valve core 2 also includes a fixed core 21, with hot water valve port 211 and cold water valve port 212 respectively disposed on the fixed core 21. The valve body 1 includes an upper outer shell 18 and a lower outer shell 19 threadedly connected to the upper outer shell 18. The fixed core 21 is provided with an anti-rotation protrusion 219 embedded in the inner wall of the upper outer shell 18 along the axis of the threaded connection between the upper outer shell 18 and the lower outer shell 19. The lower outer shell 19, the rotating core valve port 221, and the fixed core 21 abut against each other in sequence, so that the fixed core 21 is fixed inside the valve body 1. Typically, a sealing ring (not shown in the attached figure) is provided between the top of the lower outer shell 19 and the rotating core 22. During assembly, the upper outer shell 18 is inverted so that its opening faces upward, then the fixed core 21 is moved along the axis of the threaded connection between the upper outer shell 18 and the lower outer shell 19, then the rotating core 22 is placed on the fixed core 21, and then the lower outer shell 19 is threadedly connected to the upper outer shell 18 to complete the assembly. That is, the temperature control valve can be easily assembled.

[0047] As one specific implementation, the temperature control valve of this utility model embodiment further includes a mixing spiral component 132 located in the mixing chamber 131, with the temperature sensor 82 located below the mixing spiral component 132. The mixing spiral component 132 is a prior art static mixer. The hot water output from the hot water valve port 211 and the cold water output from the cold water valve port 212 pass through the mixing spiral component 132, ensuring that the hot and cold water are fully mixed in the mixing chamber 131, and ensuring the accuracy of the mixed water temperature measured by the temperature sensor 82.

[0048] As one specific implementation method, in the thermostatic valve of this utility model embodiment, a positioning boss 133 is fixedly provided on the lower outer shell 19. The positioning boss 133 abuts against the mixing spiral component 132, and the temperature sensor 82 extends into the mixing chamber 131 from the side wall of the positioning boss 133. This facilitates the assembly of the thermostatic valve.

[0049] As one specific implementation method, a top gap 134 is provided between the top end of the mixing spiral component 132 and the rotating core 22. This ensures that hot and cold water are fully mixed in the mixing chamber 131, and ensures that the temperature of the mixed water measured by the temperature sensor 82 is accurate.

[0050] As one specific implementation method, both the fixed core 21 and the rotating core 22 are made of ceramic to ensure the sealing of the part where the fixed core 21 and the rotating core 22 are in contact.

[0051] As one of the specific implementation methods, the valve core 2 also includes a sealing element 23 provided with a through hole 231. The sealing element 23 is located between the upper outer shell 18 and the fixed core 21, and the through hole 231 is respectively facing the hot water valve port 211 and the cold water valve port 212.

[0052] As one specific implementation, the temperature control valve of this utility model embodiment also includes a retaining ring 292 and a connecting shaft 29 with a retaining ring groove 291. One end of the connecting shaft 29 is inserted into the rotating core 22, and the other end extends from the upper outer casing 18 and is fixedly connected to the output end of the servo motor 81 (the connecting shaft 29 can be the output end of the servo motor 81, or it can be inserted into and fixed to the output end of the servo motor 81). The retaining ring groove 291 is exposed from the upper outer casing 18, and the retaining ring 292 is inserted into the retaining ring groove 291. This facilitates the assembly of the temperature control valve.

[0053] The terms used in this invention, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are merely for distinction.

[0054] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0055] In this utility model, terms indicating direction or location such as top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, and below are used to indicate relative positions rather than absolute positions.

[0056] Terms used in this invention, such as "approximately," "generally," "approximately," and "similar," are limiting terms used to indicate features that are present but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context; for example, regarding dimensional deviations, the specific context may include, but is not limited to, relevant standards for dimensional tolerances.

Claims

1. A temperature control valve, comprising a valve body (1) and a valve core (2), an electronic control device (8), a temperature sensor (82), and a fixed servo motor (81) relative to the valve body (1); the servo motor (81) and the temperature sensor (82) are electrically connected to the electronic control device (8); the valve body (1) is provided with a hot water inlet (11), a hot water valve port (211), a cold water inlet (12), a cold water valve port (212), a mixed water outlet (13), and a mixing chamber (131); the hot water inlet (11) is connected to the cold water inlet (12), the cold water inlet (12) is connected to the cold water valve port (212), and the mixed water outlet (13) is connected to the mixing chamber (131); the temperature sensor (82) has a portion located inside the mixing chamber (131); Its characteristics are, The valve core (2) includes a rotating core (22), a fixed core (21) having a hot water valve port (211) and a cold water valve port (212) with the same cross-section as the hot water valve port (211); the rotating core (22) has a rotating core valve port (221); the fixed core (21) is fixed in the mixing chamber (131), the rotating core (22) is in contact with the fixed core (21) and connected to the rotating output end of the servo motor (81); the rotating core valve port (221) is the same as the rotating output end of the servo motor (81) when viewed from below. The annular sector shape of the axis of rotation of the core valve port (221) is configured to enable the core valve port (221) to achieve the following two states: the area of ​​the overlapping part of the core valve port (221) and the hot water valve port (211) is equal to the area of ​​the overlapping part of the core valve port (221) and the cold water valve port (212); one of the hot water valve port (211) and the cold water valve port (212) is completely located inside the core valve port (221), and the other is completely misaligned with the core valve port (221).

2. The thermostatic valve according to claim 1, characterized in that The valve core (2) also includes a fixed core (21), and the hot water valve port (211) and the cold water valve port (212) are respectively disposed on the fixed core (21); the valve body (1) includes an upper outer shell (18) and a lower outer shell (19) threadedly connected to the upper outer shell (18); the fixed core (21) is provided with an anti-rotation protrusion (219) embedded in the inner wall of the upper outer shell (18) along the axis of the threaded connection between the upper outer shell (18) and the lower outer shell (19), and the lower outer shell (19), the rotating core valve port (221), and the fixed core (21) abut against each other in sequence.

3. The thermostatic valve according to claim 2, characterized in that It also includes a water mixing spiral (132) located in the mixing chamber (131), and a temperature sensor (82) located below the water mixing spiral (132).

4. The thermostatic valve according to claim 3, characterized in that The lower outer shell (19) is fixedly provided with a positioning boss (133), which abuts against the mixing spiral component (132), and the temperature sensor (82) extends into the mixing chamber (131) from the side wall of the positioning boss (133).

5. The thermostatic valve according to claim 4, characterized in that A top gap (134) is provided between the top end of the mixing spiral component (132) and the rotating core (22).

6. The thermostatic valve according to claim 2, characterized in that Both the fixed core (21) and the rotating core (22) are made of ceramic.

7. The thermostatic valve according to claim 1, characterized in that The valve core (2) also includes a sealing element (23) with a through hole (231). The sealing element (23) is located between the upper outer shell (18) and the fixed core (21). The through hole (231) is directly opposite the hot water valve port (211) and the cold water valve port (212).

8. The thermostatic valve according to claim 1, characterized in that It also includes a snap ring (292) and a connecting shaft (29) with a snap ring groove (291). One end of the connecting shaft (29) is inserted into the rotating core (22), and the other end extends out from the upper housing (18) and is fixedly connected to the output end of the servo motor (81). The snap ring groove (291) is exposed from the upper housing (18), and the snap ring (292) is inserted into the snap ring groove (291).

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