Thermostatic valve control method and thermostatic valve

Abstract

The present invention discloses a thermostatic valve control method, comprising: inputting hot water and cold water into a first water inlet channel and a second water inlet channel; water entering a mixing water chamber through the first water inlet channel impacts a guide ring and flows to the direction of a water outlet of the second water inlet channel; water after the guide is mixed once with water entering through the second water inlet channel in a guide area; mixed water after the first mixing enters a mixing water area for secondary mixing; mixed water after the secondary mixing enters a thermosensitive reaction chamber to form a quasi-constant temperature field and contacts a thermosensitive element; the thermosensitive element is deformed under the action of the quasi-constant temperature field to change the force applied by the thermosensitive element to the valve core sleeve; the valve core sleeve adjusts the water intake under the action of the thermosensitive element, the mixed water in the mixing water chamber and a reset spring. The present invention also discloses a thermostatic valve. The present invention realizes the full mixing and exchange of hot and cold water and the full heat exchange of mixed water and thermosensitive elements, changes the force mode of the valve core sleeve, and improves the accuracy of regulation.

Description

Technical Field

[0001] The invention relates to the field of sanitary ware, and in particular to a thermostatic valve control method and a thermostatic valve. Background Art

[0002] like Figure 1 As shown, the existing thermostatic faucet temperature adjustment principle is to use the pressure of hot and cold water to push the sleeve 1' respectively, wherein hot water and cold water enter the thermosensitive element 2' from both ends of the sleeve 1' respectively, and the hot water inlet is set at one end close to the thermosensitive element 2', and the outlet water temperature setting is determined by the thermal expansion pre-thrust force generated by the thermosensitive element 2' at this temperature and the elastic force of the return spring 3', and the two reach a balanced state position. When the external water inlet pressure and temperature change introduce the mixed water temperature change, the thermosensitive element 2' will then undergo thermal expansion and contraction reaction, breaking the original force balance, thereby pushing the sleeve 1' to move axially to adjust the ratio of hot and cold water, thereby maintaining the stability of the outlet water temperature. For example, when the mixed water temperature is sensed to rise, the thermosensitive element 2' expands and compresses the return spring 3' to move the sleeve 1' to the left, thereby reducing the hot water inlet flow rate and increasing the cold water inlet flow rate, adjusting the ratio of hot and cold water to stabilize the mixed water temperature fluctuation.

[0003] like Figure 2 As shown, the thermosensitive elements in existing thermostatic faucets generally use paraffin technology to achieve regulation. When the standard water supply conditions (hot and cold water pressure 0.3MPa, cold water temperature 15℃-20℃, hot water temperature 65℃-70℃) change, the instantaneous mixed water temperature will fluctuate within ±10℃; when the non-standard water supply conditions change, the fluctuation range exceeds ±15℃, which is beyond the temperature that the human body can instantly accept, and the body feels hot and cold. This large range of fluctuations will last for about 5 seconds.

[0004] Combination Figure 1 and Figure 2 The above reasons mainly include the following three aspects:

[0005] 1. The control principle of the traditional water thermostatic faucet is that the hot and cold water enter the thermistor from both ends of the sliding sleeve respectively, and the hot water inlet is close to the thermistor. Around the thermistor, the hot and cold water flow away without sufficient heat exchange, causing the thermistor to react not according to the terminal mixed water temperature information, but according to the hot water temperature that has not been fully exchanged.

[0006] 2. The hot and cold water enter the vicinity of the thermal element from both ends of the sleeve. The force balance equation of the sleeve is: P H +κ*Δx=P C +λ*Δx, where P H is the hot water pressure, P Cis the cold water pressure, λ is the expansion coefficient of the thermosensitive element, κ is the spring elastic coefficient, and Δx is the displacement. It should be noted that the force on the sleeve also includes friction, but the actual friction on the sleeve is less affected by water pressure or water temperature, and it can be considered a constant in the study of factors affecting the displacement change of the sleeve. Accordingly, the sleeve displacement formula can be derived: Δx=(p C -p H ) / (λ-κ), it can be concluded that the displacement variable of the sliding sleeve is proportional to the pressure difference ratio of cold and hot water. The larger the pressure difference ratio, the larger the displacement variable. At the same time, according to the law of conservation of energy, the relationship between the temperature change of mixed water can be deduced: ΔT M ∝Δx*(T H -T C ), it can be concluded that the greater the change in displacement Δx, the greater the change in mixed water temperature ΔT M The bigger it is.

[0007] 3. The thermosensitive element of the traditional water thermostatic faucet adopts a rod-shaped design, which has slow heat exchange efficiency and temperature lag.

[0008] Therefore, when the water supply condition of the traditional water thermostatic faucet changes, the thermal expansion and contraction strain of the thermal sensitive element in the uneven temperature field fluctuates, thereby exacerbating the fluctuation of the water outlet temperature. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a thermostatic valve control method and a thermostatic valve, which can realize the constant temperature of the thermostatic faucet throughout the whole process, especially solve the problem of sudden changes in the water inlet pressure and temperature of hot and cold water in the shower, thereby greatly improving the comfort of showering.

[0010] In order to solve the above technical problems, the present invention provides a thermostatic valve control method, the thermostatic valve includes a handle mechanism, a valve core base, a valve core sleeve, a thermal element and a reset spring, the valve core sleeve is arranged in the valve core base and a guide ring is arranged on the valve core sleeve, the guide ring divides the inner cavity formed by the valve core base and the valve core sleeve into a mixing water cavity and a thermal reaction cavity and divides the mixing water cavity into a guide area and a mixing water area, the valve core base and the valve core sleeve are provided with a first water inlet channel and a second water inlet channel connected to the mixing water cavity, the thermostatic valve control method includes: respectively inputting hot water and cold water into the first water inlet channel and the second water inlet channel, so that the hot water and the cold water enter the mixing water cavity of the valve core sleeve along the first water inlet channel and the second water inlet channel respectively; the water entering the mixing water cavity through the first water inlet channel impacts the The guide ring is provided, and under the action of the guide ring, it flows along the guide direction to the water outlet direction of the second water inlet channel; the water after the guide is mixed with the water entering the mixing chamber through the second water inlet channel in the guide area of ​​the mixing chamber to form mixed water; the mixed water after the first mixing enters the mixing area of ​​the mixing chamber for secondary mixing; the mixed water after the secondary mixing enters the thermosensitive reaction chamber to form a quasi-constant temperature field, and contacts with the thermistor in the thermosensitive reaction chamber; the thermosensitive element is deformed under the action of the quasi-constant temperature field to change the force applied by the thermosensitive element to the valve core sleeve; the valve core sleeve slides relatively along the inner wall of the valve core base under the action of the thermosensitive element, the mixed water in the mixing water chamber and the reset spring to adjust the water inlet amount of the first water inlet channel and the second water inlet channel.

[0011] As an improvement of the above-mentioned scheme, the method includes: the valve core sleeve relatively slides along the inner wall of the valve core base under the action of the thermistor, the mixed water in the mixing water chamber and the reset spring to adjust the water inlet amount of the first water inlet channel and the second water inlet channel, and the valve core sleeve adjusts the water inlet amount of the first water inlet channel and the second water inlet channel according to the thrust of the thermistor, the thrust of the mixed water in the mixing water chamber and the reset force of the reset spring, and the thrust direction of the thermistor is opposite to the thrust direction of the mixed water in the mixing water chamber.

[0012] As an improvement of the above scheme, the valve core sleeve slides relatively along the inner wall of the valve core base under the action of the thermosensitive element, the mixed water in the mixing chamber and the reset spring to adjust the water inflow of the first water inlet channel and the second water inlet channel. The method includes: the valve core sleeve slides relatively along the inner wall of the valve core base under the action of the thermosensitive element, the mixed water in the mixing chamber and the reset spring to adjust the water inflow of the first water inlet channel and the second water inlet channel according to the formula Δx=p M / (λ-κ) produces displacement to adjust the water inflow of the first water inlet channel and the second water inlet channel, where Δx is the displacement of the valve core sleeve, p M is the thrust of the mixed water in the mixing chamber, λ is the expansion coefficient of the thermal element, and κ is the elastic coefficient of the spring.

[0013] As an improvement of the above scheme, hot water and cold water are respectively input into the first water inlet channel and the second water inlet channel, wherein: when hot water is input into the first water inlet channel, cold water is input into the second water inlet channel; when cold water is input into the first water inlet channel, hot water is input into the second water inlet channel.

[0014] As an improvement on the above scheme, the cross-section of the guide ring is an L-shaped cross-section, and the L-shaped cross-section includes a first cross-section segment and a second cross-section segment that are perpendicular to each other, one end of the first cross-section segment is connected to the valve core sliding sleeve, the other end of the first cross-section segment is connected to one end of the second cross-section segment, the other end of the second cross-section segment is a convex arc structure, the connection between the first cross-section segment and the second cross-section segment is an arc transition, and the second cross-section segment is arranged opposite to the water outlet of the first water inlet channel; the water entering the mixing chamber through the first water inlet channel impacts the guide ring, and under the action of the guide ring, flows along the guide direction to the water outlet direction of the second water inlet channel, including: the water entering the mixing chamber through the first water inlet channel flows along the first cross-section segment; when the water reaches the connection between the first cross-section segment and the second cross-section segment, under the guide action of the arc transition position, the water flows along the guide direction to the water outlet direction of the second water inlet channel for mixing.

[0015] As an improvement of the above scheme, the mixed water after the first mixing enters the mixing zone of the mixing water chamber along the diversion direction under the diversion effect of the convex arc position for secondary mixing and then enters the thermosensitive reaction chamber to form a quasi-constant temperature field.

[0016] As an improvement on the above scheme, the thermistor includes an annular base, paraffin, a diaphragm and a piston, one end of the annular base is provided with a mixed water outlet, the other end of the annular base is connected to one end of the piston, the other end of the piston is connected to the guide ring on the valve core sleeve, the side wall of the annular base is a hollow structure, the paraffin is arranged in the hollow structure and is connected to the piston through the diaphragm; the thermistor is deformed under the action of the quasi-constant temperature field to change the force applied by the thermistor to the valve core sleeve, the steps include: the annular base conducts the temperature of the mixed water in the quasi-constant temperature field to the paraffin; the paraffin is deformed according to the temperature of the mixed water, and drives the mold to adjust the real-time position of the piston; the piston drives the valve core sleeve through the guide ring to change the force state of the valve core sleeve.

[0017] As an improvement of the above scheme, the thermostatic valve control method also includes: the mixed water after the second mixing enters the quasi-constant temperature field of the thermosensitive reaction chamber for third mixing; and the mixed water after the third mixing is discharged along the mixed water outlet in the thermosensitive reaction chamber.

[0018] Correspondingly, the present invention also provides a thermostatic valve, which adopts the above-mentioned thermostatic valve control method.

[0019] The implementation of the present invention has the following beneficial effects:

[0020] The present invention conducts multiple diversion and mixing of cold and hot water, so that the mixed water is fully mixed before contacting the thermosensitive element, and the temperature of the mixed water is similar to that of the mixed water finally output by the thermostatic valve. The present invention can also realize the positive and negative connection of cold water and hot water (only the valve core sleeve needs to be replaced), has no position requirements, and has strong flexibility.

[0021] At the same time, the present invention simplifies the force factors of the valve core sleeve from four to three (the thrust of the mixed water in the mixing chamber, the expansion force coefficient of the thermal element and the elastic coefficient of the spring), which can facilitate rapid adjustment of the sleeve, easier to achieve a new balance, and shorter response time.

[0022] In addition, the mixed water after secondary mixing enters the thermosensitive reaction chamber, forming a quasi-constant temperature field around the thermosensitive element. At the same time, the thermosensitive element adopts a ring-shaped design, which greatly increases the heat exchange area of ​​the thermosensitive element and improves its reaction speed. It can be quickly adjusted to a comfortable temperature perceived by the human body and discharged from the mixed water outlet in the thermosensitive reaction chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an existing thermostatic valve;

[0024] Figure 2 It is a schematic diagram of the mixed water temperature of the existing thermostatic valve;

[0025] Figure 3 is a flow chart of an embodiment of a thermostatic valve control method of the present invention;

[0026] Figure 4 It is a schematic diagram of mixed water temperature of the thermostatic valve control method of the present invention;

[0027] Figure 5 It is a regional division diagram of the thermostatic valve of the present invention;

[0028] Figure 6 is a cross-sectional view of a thermostatic valve of the present invention;

[0029] Figure 7 is a cross-sectional view of a guide ring in a thermostatic valve of the present invention;

[0030] Figure 8 It is a cross-sectional view of a thermal sensitive element in a thermostatic valve of the present invention. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 3 , Figure 3 An embodiment of a thermostatic valve control method of the present invention is shown, which comprises:

[0033] S101, inputting hot water and cold water into the first water inlet channel and the second water inlet channel respectively, so that the hot water and cold water enter the mixing chamber of the valve core sliding sleeve along the first water inlet channel and the second water inlet channel respectively.

[0034] like Figure 5 and 6 As shown, the thermostatic valve used in the present invention includes a handle mechanism 4, a valve core base 5, a valve core sleeve 1, a thermosensitive element 2 and a reset spring 3. The valve core sleeve 1 is arranged in the valve core base 5 and a guide ring 6 is arranged on the valve core sleeve 1. The guide ring 6 divides the inner cavity formed by the valve core base 5 and the valve core sleeve 1 into a mixed water cavity and a thermosensitive reaction cavity N, and divides the mixed water cavity into a guide area M1 distributed along the inner wall of the valve core sleeve 1 and a mixed water area M2 located in the middle of the valve core sleeve 1. The valve core base 5 and the valve core sleeve 1 are provided with a first water inlet channel 11 and a second water inlet channel 12 connected to the mixed water cavity. Among them, the reset spring 3 is arranged in the mixed water cavity, and the thermosensitive element 2 is arranged in the thermosensitive reaction cavity N.

[0035] When the thermostatic valve is started, hot water and cold water are respectively input into the first water inlet channel 11 and the second water inlet channel 12. When hot water is input into the first water inlet channel 11, cold water is input into the second water inlet channel 12; when cold water is input into the first water inlet channel 11, hot water is input into the second water inlet channel 12.

[0036] It should be noted that the thermosensitive element 2 in the existing thermostatic valve generally uses paraffin technology to achieve regulation. Since paraffin sets parameters based on the maximum coefficient of expansion force in the human body temperature phase change zone, when the thermostatic valve in the prior art is connected to cold water and hot water, it is necessary to use the left hot and right cold method. If the reverse connection method of left cold and right hot is used, the thermostatic valve will fail. Different from the prior art, the thermostatic valve of the present invention has no position requirements when connected to cold water and hot water, and only the valve core sleeve needs to be replaced, which is highly flexible.

[0037] S102, water entering the water mixing chamber through the first water inlet channel impacts the guide ring, and under the action of the guide ring, flows along the guide direction to the water outlet direction of the second water inlet channel.

[0038] like Figure 7As shown, the cross-section of the guide ring 6 used in the present invention is an L-shaped cross-section, and the L-shaped cross-section includes a first cross-section segment 61 and a second cross-section segment 62 which are perpendicular to each other. One end of the first cross-section segment 61 is connected to the valve core sliding sleeve 1, and the other end of the first cross-section segment 61 is connected to one end of the second cross-section segment 62. The other end of the second cross-section segment 62 is a convex arc structure, and the connection between the first cross-section segment 61 and the second cross-section segment 62 is an arc transition. The second cross-section segment 62 is arranged opposite to the water outlet of the first water inlet channel 11.

[0039] Specifically, water entering the mixing chamber through the first water inlet channel 11 flows along the first cross-sectional segment 61; when the water reaches the connection between the first cross-sectional segment 61 and the second cross-sectional segment 62, under the guidance effect of the arc-shaped transition position, the water flows along the guidance direction to the water outlet direction of the second water inlet channel 12 for mixing.

[0040] Preferably, the arc-shaped transition is a circular arc transition, and the convex arc structure is a circular arc structure, which can further enhance the flow guidance effect.

[0041] S103, the water after diversion is mixed with the water entering the water mixing chamber through the second water inlet channel in the diversion area of ​​the water mixing chamber to form mixed water.

[0042] S104, the mixed water after the first mixing enters the mixing area of ​​the mixing chamber for secondary mixing.

[0043] S105, the mixed water after secondary mixing enters the thermosensitive reaction chamber to form a quasi-constant temperature field, and contacts with the thermosensitive element in the thermosensitive reaction chamber.

[0044] Combination Figure 5 and Figure 6 As shown, after the primary mixing, the mixed water enters the mixing area of ​​the mixing chamber along the diversion direction under the diversion effect of the convex arc position for secondary mixing and then enters the thermosensitive reaction chamber N to form a quasi-constant temperature field.

[0045] It should be noted that the water outlet of the first water inlet channel 11 is directly opposite to the guide ring 6. Therefore, under the guiding effect of the guide ring 6, the water entering the mixing water chamber through the first water inlet channel 11 is firstly guided to the right by the Coanda effect and heat exchanged with the water of the second water inlet channel 12 in the guide area M1 of the mixing water chamber to form mixed water; then, the mixed water after the first mixing is guided to the left side of the valve core sleeve 1 by the Coanda effect again; then, after further mixing in the mixing water area M2 of the mixing water chamber through the valve core sleeve 1, it enters the thermosensitive reaction chamber N on the left side of the valve core sleeve 1. In this process, the heat exchange time of cold and hot water is longer than that of the prior art, so that the temperature field around the thermosensitive element 2 is close to the terminal mixed water temperature field to form a quasi-constant temperature field.

[0046] S106, the thermal element is deformed under the action of the quasi-constant temperature field to change the force applied by the thermal element to the valve core sleeve.

[0047] In the prior art, the hot water temperature is often used as the temperature source of the thermosensitive element. Different from the prior art, the present invention places the thermosensitive element at a position where the ambient temperature is close to the terminal mixed water temperature field (i.e., quasi-constant temperature field), and uses the mixed water temperature of the quasi-constant temperature field as the temperature source of the thermosensitive element for adjustment, which greatly improves the accuracy of the adjustment.

[0048] In addition, in order to better achieve heat exchange, the thermosensitive element of the present invention can be designed as a ring structure, which greatly increases the heat exchange area, thereby accelerating the response time of the thermosensitive element.

[0049] like Figure 8 As shown, the thermistor 2 includes an annular base 21, paraffin 22, a diaphragm 23 and a piston 24. A mixed water outlet 25 is provided at one end of the annular base 21, and the other end of the annular base 21 is connected to one end of the piston 24. The other end of the piston 24 is connected to the guide ring 6 on the valve core sleeve 1. The side wall of the annular base 21 is a hollow structure. The paraffin 22 is arranged in the hollow structure and is connected to the piston 24 through the diaphragm 23.

[0050] After the secondary mixed water enters the thermosensitive reaction chamber N, it contacts the thermosensitive element 2 in two ways in the quasi-constant temperature field, one way flows along the inner wall of the thermosensitive element 2, and the other way flows along the outer wall of the thermosensitive element 2, that is, the inner and outer walls of the thermosensitive element exchange heat with the mixed water at the same time, so that the annular base 21 fully transfers the temperature of the mixed water in the quasi-constant temperature field to the paraffin 22, greatly increasing the heat exchange area of ​​the thermosensitive element 2 and the reaction speed of the paraffin 22; at the same time, the paraffin 22 deforms according to the temperature of the mixed water, and drives the mold 23 to adjust the real-time position of the piston 24; then, the piston 24 drives the valve core sleeve 1 through the guide ring 6 to change the stress state of the valve core sleeve 1.

[0051] For example, when the paraffin 22 expands due to heat, the paraffin 22 squeezes the mold 23, and at the same time the mold 23 pushes the piston 24, and the piston 24 applies thrust to the valve core sleeve 1 through the guide ring 6, so that the force on the valve core sleeve 1 changes and produces displacement, so as to adjust the water inlet amount of the first water inlet channel 11 and the second water inlet channel 12 to achieve constant temperature control.

[0052] For another example, when the paraffin 22 shrinks due to cooling, the paraffin 22 no longer squeezes the mold 23, and the mold 23 no longer pushes the piston 24, and the piston 24 no longer applies thrust to the valve core sleeve 1 through the guide ring 6, thereby causing the force on the valve core sleeve 1 to change and produce displacement, so as to adjust the water inlet amount of the first water inlet channel 11 and the second water inlet channel 12 to achieve constant temperature control.

[0053] S107, the valve core sleeve slides relatively along the inner wall of the valve core base under the action of the thermosensitive element, the mixed water in the mixing water chamber and the return spring to adjust the water inlet amount of the first water inlet channel and the second water inlet channel.

[0054] Specifically, the valve core sleeve can adjust the water inlet amount of the first water inlet channel and the second water inlet channel according to the thrust of the thermistor, the thrust of the mixed water in the mixing water chamber and the reset force of the reset spring. The thrust direction of the thermistor is opposite to the thrust direction of the mixed water in the mixing water chamber.

[0055] It should be noted that the water input into the first water inlet channel and the second water inlet channel is mixed twice in the valve core sleeve to form thrust. The independent thrust formed by the water in the first water inlet channel and the second water inlet channel does not act on the valve core sleeve, which greatly simplifies the force factors of the valve core sleeve and facilitates rapid adjustment of the sleeve.

[0056] Further, the valve core sleeve is based on the formula Δx = p M / (λ-κ) produces displacement to adjust the water inlet volume of the first water inlet channel and the second water inlet channel, where Δx is the displacement of the valve core sleeve, p M is the thrust of the mixed water in the mixing chamber, λ is the expansion coefficient of the thermal element, and κ is the elastic coefficient of the spring.

[0057] The force balance equation of the existing valve core sleeve is: P H +κ*Δx=P C +λ*Δx, that is, the existing force factors of the valve core sleeve involve hot water pressure, cold water pressure, thermal element expansion force coefficient and spring elastic coefficient, a total of four. Different from the prior art, the force thermal balance equation of the valve core sleeve in the present invention is: λ*Δx=P M +κ*Δx, that is, the force factors of the valve core sleeve in the present invention involve the thrust of the mixed water in the mixing chamber, the expansion force coefficient of the thermal element and the elastic coefficient of the spring, a total of three, thereby simplifying the force factors, facilitating the rapid adjustment of the sleeve, and making it easier to reach a new balance with a shorter reaction time. It should be noted that the force on the valve core sleeve also includes friction, but the actual friction on the sleeve is less affected by water pressure or water temperature, and can be considered a constant in the study of factors affecting the change in sleeve displacement.

[0058] Accordingly, according to the above force balance equation, the displacement formula of the valve core sleeve in the present invention can be obtained: Δx = p M / (λ-κ). From the above displacement formula, it can be analyzed that the displacement change of the valve core sleeve is related to the pressure push of the mixed water in the mixing chamber, and has no direct relationship with the cold water pressure or hot water pressure alone, nor with the pressure difference ratio between the two. Therefore, the control method of the present invention has a better ability to resist the pressure difference between cold and hot water than the thermostatic faucet with traditional water channel design, and has a wider range of applications, especially suitable for the solar water heater market.

[0059] S108, the mixed water after the second mixing enters the quasi-constant temperature field of the thermosensitive reaction chamber for third mixing.

[0060] S109, the mixed water after three mixing is discharged from the mixed water outlet in the thermosensitive reaction chamber.

[0061] It should be noted that the mixed water after the second mixing has achieved a full mixture of cold and hot water, and its temperature is close to the temperature of the mixed water after the third mixing. Therefore, the thermistor is adjusted approximately according to the mixed water discharged from the mixed water outlet, with high accuracy.

[0062] like Figure 4 As shown, the thermostatic valve control method of the present invention can control the water outlet temperature fluctuation within the range that the human body can withstand (±1°C) at the moment when the water supply conditions change, truly achieving constant temperature of the thermostatic faucet throughout the entire process, greatly improving the comfort of showering.

[0063] In summary, the present invention conducts multiple diversion and mixing of cold and hot water, so that the mixed water is fully mixed before contacting the thermosensitive element, and the temperature of the mixed water is close to that of the final output of the thermostatic valve. It can also realize the positive and negative connection of cold water and hot water (only the valve core sleeve needs to be replaced), without any position requirements and with strong flexibility. At the same time, the present invention simplifies the force factors of the valve core sleeve from four to three (the thrust of the mixed water in the mixing chamber, the expansion force coefficient of the thermosensitive element and the elastic coefficient of the spring), which can facilitate the rapid adjustment of the sleeve, and it is easier to reach a new balance with a shorter reaction time. In addition, the mixed water after the secondary mixing enters the thermosensitive reaction chamber, forming a quasi-constant temperature field around the thermosensitive element. At the same time, the thermosensitive element adopts an annular design, which greatly increases the heat exchange area of ​​the thermosensitive element and improves its reaction speed, so that it can be quickly adjusted to a comfortable temperature perceived by the human body and discharged from the mixed water outlet in the thermosensitive reaction chamber.

[0064] Correspondingly, in order to implement the above-mentioned thermostatic valve control method, the present invention also designs a thermostatic valve adopting the above-mentioned thermostatic valve control method.

[0065] like Figure 5 and 6 As shown, the thermostatic valve includes a handle mechanism 4, a valve core base 5, a valve core sleeve 1, a thermistor 2 and a reset spring 3. The valve core sleeve 1 is arranged in the valve core base 5 and a guide ring 6 is provided on the valve core sleeve 1. The guide ring 6 divides the inner cavity formed by the valve core base 4 and the valve core sleeve 1 into a mixing water cavity and a thermistor reaction cavity N and divides the mixing water cavity into a guide area M1 and a mixing water area M2. The valve core base 5 and the valve core sleeve 1 are provided with a first water inlet channel 11 and a second water inlet channel 12 which are connected to the mixing water cavity.

[0066] like Figure 7As shown, the cross section of the guide ring 6 is an L-shaped cross section, and the L-shaped cross section includes a first cross section segment 61 and a second cross section segment 62 which are perpendicular to each other. One end of the first cross section segment 61 is connected to the valve core sliding sleeve 1, and the other end is connected to one end of the second cross section segment 62. The other end of the second cross section segment 62 is a convex arc structure. The connection between the first cross section segment 61 and the second cross section segment 62 is an arc transition. The second cross section segment 62 is arranged facing the water outlet of the first water inlet channel 11. Preferably, the arc transition is a circular arc transition, and the convex arc structure is a circular arc structure, which can further improve the guide effect.

[0067] For example, the hot water entering the mixing water chamber along the first water inlet channel 11 flows along the guide direction to the water outlet of the second water inlet channel 12 under the action of the guide ring 6, and is mixed with the cold water input from the second water inlet channel in the guide area M1; then, the mixed water flows along the guide direction to the mixing water area M2 under the action of the guide ring 6 for secondary mixing; then, the mixed water flows along the guide direction to the vicinity of the thermosensitive element 2 under the action of the guide ring 6 again. At this time, the mixed water fully completes the heat exchange, so that the thermosensitive element 2 is located The temperature field is close to the terminal mixed water temperature field, and the reactions of various parts of the thermistor 2 can be considered to be based on the terminal mixed water temperature information; the thermistor 2 is deformed under the action of the mixed water to change the force applied by the thermistor 2 to the valve core sleeve 1. At this time, the valve core sleeve 1 slides relatively along the inner wall of the valve core base 5 under the action of the thermistor 2, the mixed water in the mixed water chamber and the return spring 3 to adjust the water inlet amount of the first water inlet channel 11 and the second water inlet channel 12; finally, the mixed water flows along the thermosensitive reaction chamber N to the mixed water outlet for discharge.

[0068] Furthermore, the thermosensitive element 2 in the present invention can also be designed as a ring structure, which greatly increases the heat exchange area, thereby accelerating the response time of the thermosensitive element.

[0069] like Figure 8 As shown, the thermistor 2 includes an annular base 21, paraffin 22, a diaphragm 23 and a piston 24. One end of the annular base 21 is provided with a mixed water outlet 25, and the other end is connected to one end of the piston 24; the other end of the piston 24 is connected to the guide ring 6 on the valve core sleeve 1; the side wall of the annular base 21 is a hollow structure, and the paraffin 22 is arranged in the hollow structure, one end of the hollow structure is sealed, and the other end is connected to the piston 24 through the diaphragm 23.

[0070] For example, when the mixed water contacts the thermosensitive element 2, the paraffin 22 expands due to the heat and squeezes the mold 23. At the same time, the mold 23 pushes the piston 24, and the piston 24 applies thrust to the valve core sleeve 1 through the guide ring 6, so that the force on the valve core sleeve 1 changes and produces displacement, so as to adjust the water inlet amount of the first water inlet channel 11 and the second water inlet channel 12 to achieve constant temperature control.

[0071] Preferably, the annular base 21 is made of copper, which has good thermal conductivity and can ensure accurate temperature sensing by the paraffin 22. Meanwhile, the diaphragm 23 is a rubber diaphragm, which is easy to deform and has good sealing performance.

[0072] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A thermostatic valve control method, characterized in that: The thermostatic valve comprises a handle mechanism, a valve core base, a valve core sleeve, a thermal element and a reset spring, the valve core sleeve is arranged in the valve core base and a guide ring is arranged on the valve core sleeve, the guide ring divides the inner cavity formed by the valve core base and the valve core sleeve into a water mixing cavity and a thermal reaction cavity and divides the water mixing cavity into a guide area and a water mixing area, the valve core base and the valve core sleeve are provided with a first water inlet channel and a second water inlet channel connected to the water mixing cavity, and the thermostatic valve control method comprises: Inputting hot water and cold water into the first water inlet channel and the second water inlet channel respectively, so that the hot water and cold water enter the mixing chamber of the valve core sliding sleeve along the first water inlet channel and the second water inlet channel respectively; The water entering the mixing chamber through the first water inlet channel impacts the guide ring, and under the action of the guide ring, flows along the guide direction to the water outlet direction of the second water inlet channel; The water after diversion is mixed with the water entering the water mixing chamber through the second water inlet channel in the diversion area of ​​the water mixing chamber to form mixed water; The mixed water after the primary mixing enters the mixing area of ​​the mixing chamber for secondary mixing; The mixed water after secondary mixing enters the thermosensitive reaction chamber to form a quasi-constant temperature field and contacts the thermosensitive element in the thermosensitive reaction chamber; the thermosensitive element is a ring-shaped structure, and after the mixed water after secondary mixing enters the thermosensitive reaction chamber, it contacts the thermosensitive element in two ways in the quasi-constant temperature field, one way flows along the inner wall of the thermosensitive element, and the other way flows along the outer wall of the thermosensitive element, so that the inner and outer walls of the thermosensitive element and the mixed water are heat-exchanged at the same time; The thermal element is deformed under the action of the quasi-constant temperature field to change the force applied by the thermal element to the valve core sleeve; The valve core sliding sleeve slides relatively along the inner wall of the valve core base under the action of the thermosensitive element, the mixed water in the water mixing chamber and the reset spring to adjust the water inlet amount of the first water inlet channel and the second water inlet channel.

2. The thermostatic valve control method according to claim 1, characterized in that: The method in which the valve core sliding sleeve slides relatively along the inner wall of the valve core base under the action of the thermosensitive element, the mixed water in the mixing water chamber and the reset spring to adjust the water inflow of the first water inlet channel and the second water inlet channel includes: The valve core sleeve adjusts the water inlet amount of the first water inlet channel and the second water inlet channel according to the thrust of the thermal element, the thrust of the mixed water in the mixing water chamber and the reset force of the reset spring. The thrust direction of the thermal element is opposite to the thrust direction of the mixed water in the mixing water chamber.

3. The thermostatic valve control method according to claim 1 or 2, characterized in that: The method in which the valve core sliding sleeve slides relatively along the inner wall of the valve core base under the action of the thermosensitive element, the mixed water in the mixing water chamber and the reset spring to adjust the water inflow of the first water inlet channel and the second water inlet channel includes: The valve core sleeve is according to the formula Generate displacement to adjust the water inflow of the first water inlet channel and the second water inlet channel, wherein: is the displacement of the valve core sleeve, is the thrust of the mixed water in the mixing chamber, is the expansion force coefficient of the thermal element, is the elastic constant of the spring.

4. The thermostatic valve control method according to claim 1, characterized in that: The hot water and the cold water are respectively input into the first water inlet channel and the second water inlet channel, wherein: When hot water is input into the first water inlet channel, cold water is input into the second water inlet channel; When cold water is input into the first water inlet channel, hot water is input into the second water inlet channel.

5. The thermostatic valve control method according to claim 1, characterized in that: The cross section of the guide ring is an L-shaped cross section, and the L-shaped cross section includes a first cross section segment and a second cross section segment that are perpendicular to each other, one end of the first cross section segment is connected to the valve core sliding sleeve, the other end of the first cross section segment is connected to one end of the second cross section segment, the other end of the second cross section segment is a convex arc structure, the connection between the first cross section segment and the second cross section segment is an arc transition, the second cross section segment is arranged opposite to the water outlet of the first water inlet channel, and the water entering the mixing chamber through the first water inlet channel impacts the guide ring, and under the action of the guide ring, flows along the guide direction to the water outlet direction of the second water inlet channel. The steps include: The water entering the water mixing chamber through the first water inlet channel flows along the first cross-sectional segment; When the water reaches the connection between the first cross-sectional segment and the second cross-sectional segment, under the guiding effect of the arc-shaped transition position, the water flows along the guiding direction to the water outlet direction of the second water inlet channel to be mixed.

6. The thermostatic valve control method according to claim 5, characterized in that: The mixed water after the primary mixing enters the water mixing area of ​​the water mixing chamber along the diversion direction under the diversion effect of the convex arc position for secondary mixing and then enters the thermosensitive reaction chamber to form a quasi-constant temperature field.

7. The thermostatic valve control method according to claim 1, characterized in that: The thermosensitive element comprises an annular base, paraffin, a diaphragm and a piston, one end of the annular base is provided with a mixed water outlet, the other end of the annular base is connected to one end of the piston, the other end of the piston is connected to a guide ring on the valve core sleeve, the side wall of the annular base is a hollow structure, the paraffin is arranged in the hollow structure and is connected to the piston through the diaphragm, the thermosensitive element is deformed under the action of the quasi-constant temperature field, and the steps of changing the force applied by the thermosensitive element to the valve core sleeve include: The annular base conducts the temperature of the mixed water in the quasi-constant temperature field to the paraffin; The paraffin is deformed according to the temperature of the mixed water, and drives the diaphragm to adjust the real-time position of the piston; The piston drives the valve core sliding sleeve through the guide ring to change the stress state of the valve core sliding sleeve.

8. The thermostatic valve control method according to claim 1, characterized in that: Also includes: The mixed water after the second mixing enters the quasi-constant temperature field of the thermosensitive reaction chamber for third mixing; The mixed water after three mixings is discharged from the mixed water outlet in the thermosensitive reaction chamber.

9. A thermostatic valve, characterized in that: The thermostatic valve adopts the thermostatic valve control method described in any one of claims 1-8.

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