An adjustable fluid jet water mixing valve

Abstract

The application discloses a kind of adjustable jet mixing valve, the spray needle is arranged in the nozzle, cold water inflow space and cold water jet outlet are formed between the spray needle and nozzle, hot water inflow space is formed between the nozzle and valve body, the cold water inlet is respectively communicated with the cold water port and cold water inflow space, the hot water inlet is respectively communicated with the hot water port and hot water inflow space, in use, first pull up the handle, drive spray needle to move along the axis direction and open cold water jet outlet, then rotate the handle, drive the inner square hole rotating gland and groove wheel sleeve to rotate, in turn drive nozzle axial movement, realize the adjustment to cold water inflow space, hot water inflow space and cold water jet outlet, the application realizes relatively simple operation and better jet effect.

Description

Technical Field

[0001] This invention relates to a jet mixer, to the field of valves, and more particularly to a novel mixing valve. Background Technology

[0002] Existing mixing valves mainly include manual mixing valves and thermostatic mixing valves.

[0003] Manual thermostatic valves typically use a screw-lift valve core. The rotation of the handle is converted into linear displacement of the valve core via a screw mechanism, thus regulating the temperature. The structure and operating principle of this type of valve make its operation relatively intuitive and simple, suitable for applications where temperature control requirements are not very high or where manual adjustment is necessary. The selection and use of manual thermostatic valves mainly depend on factors such as their material, brand, and whether they meet specific installation requirements. A manual mixing valve is simply a valve that mixes hot and cold water. The valve itself cannot mix water; it only serves to mix water when connected to hot and cold water pipes.

[0004] Thermostatic mixing valves are primarily used in heating systems and are widely applied in electric water heaters, solar water heaters, and centralized hot water supply systems. By adjusting the ratio of hot and cold water, the mixing valve regulates the water temperature, ensuring a constant outlet temperature unaffected by changes in water temperature, flow rate, or pressure. This technology solves the problem of fluctuating water temperatures in bathhouses and automatically shuts off hot water when cold water supply is interrupted, providing safety protection. The working principle of the mixing valve is based on a thermostatic element installed at the mixing outlet. The temperature-sensing element moves the valve core within the valve body, blocking or opening the inlets for both hot and cold water. Once a certain temperature is set, the mixing valve maintains a stable outlet temperature regardless of changes in the inlet temperature or pressure of the hot and cold water. This technology not only improves user comfort but also saves energy and water, extending the lifespan of the water heater. However, thermostatic mixing valves have higher manufacturing costs, some issues with adjustment precision, making it difficult to guarantee accuracy and stability, and also have a shorter lifespan and higher maintenance costs.

[0005] Chinese patent document CN103769320 A discloses an adjustable jet shower device, belonging to the jet mixer in a solar water heater supply system, which features a jet pressurization structure. However, the jet mixer disclosed in this document requires first turning on the cold water switch, waiting for a period of time, and then turning on the hot water switch. Finally, the mixing ratio is adjusted by using a separate adjustment knob to adjust the nozzle. The operation is relatively cumbersome and has a certain learning curve; incorrect operation sequence will not achieve the expected pressurized jet effect.

[0006] As can be seen from the above discussion, how to improve the mixing valve to reduce its operating cost, especially by using a single operating component to switch and adjust the entire device, is a technical problem that has not yet been solved in the existing technology. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to provide a jet mixing valve that allows a single operating element to complete the switching and adjustment of the entire device.

[0008] Therefore, the present invention provides an adjustable jet mixing valve, comprising:

[0009] The mixing valve body has a cold water inlet, a hot water inlet, a cold water inlet, a hot water inlet, and a mixing outlet. The cold water inlet and the hot water inlet are respectively connected to the cold water pipe and the hot water pipe.

[0010] The adjustable jet mixing valve core comprises a lifting rod, an inner square hole rotating pressure cap, a grooved wheel sleeve pressure cap, a grooved wheel sleeve, a nozzle, and a spray needle. The grooved wheel sleeve has cold water and hot water window panes, respectively communicating with a cold water inlet and a hot water inlet. The nozzle and the spray needle are disposed within the grooved wheel sleeve, with the spray needle disposed within the nozzle. A cold water space and a cold water jet outlet are formed between the nozzle and the spray needle. A hot water space is formed between the nozzle and the grooved wheel sleeve, and a hot water suction outlet is formed between the nozzle and the space. The cold water inlet communicates with both the cold water outlet and the cold water space, and the hot water inlet communicates with both the hot water outlet and the hot water space. The position of the spray needle along the axial direction of the nozzle and the grooved wheel sleeve is adjustable. The grooved wheel sleeve is fixed along the axial direction of the adjustable jet mixing valve core. Adjustment of the relative positions of the nozzle and the spray needle along the axis of the grooved wheel sleeve allows for adjustment of the cold water space, the hot water space, the cold water jet outlet, and the hot water suction outlet.

[0011] It also includes a nozzle needle connected to the lifting rod via a thread, which moves axially within the nozzle following the lifting rod. The lifting rod consists of a square rod section and a cylindrical section.

[0012] The grooved wheel sleeve cap features a hexagonal guide groove, a rotatable cylindrical channel groove, an anti-rotation notch, and a circular hole boss. The grooved wheel sleeve cap engages with the valve body via the anti-rotation notch, preventing relative rotation along the valve body axis. The hexagonal guide rail on the nozzle engages with the hexagonal guide groove on the grooved wheel sleeve cap, allowing the hexagonal guide rail to move axially within its axis, thus restricting relative rotation of the nozzle along the valve body axis.

[0013] The cylindrical boss on the nozzle engages with the cam groove on the grooved wheel sleeve. When the grooved wheel sleeve is rotated, the nozzle moves along its axial direction. The grooved wheel sleeve, through its rotating connecting cylinder, passes through the rotating connecting cylindrical channel groove on the grooved wheel sleeve cover and engages with the rotating connecting hole on the inner square hole rotating cover. The square hole on the top surface of the inner square hole rotating cover engages with the square rod section of the lifting rod. When the lifting rod is rotated, the inner square hole rotating cover and the grooved wheel sleeve rotate accordingly. One end of the spherical cover is spherical, and the other end is threaded. The thread of the spherical cover engages with the threaded hole on the top of the valve body, simultaneously pressing down on the grooved wheel sleeve cover. There is a certain gap between the end face of the inner boss of the spherical cover and the rotating cover to prevent self-locking.

[0014] The grooved sleeve has cold water and hot water panes. The distance between the solid portions of the cold water and hot water panes should be greater than the axial movement distance of the nozzle. The axial length of the cold water and hot water panes should be slightly greater than the axial length of the cold water inlet and the hot water inlet.

[0015] The cold water jet outlet and the hot water suction outlet of the adjustable jet mixing valve core are connected, the throat is connected to the small end of the throat expansion area, and the large end of the throat expansion area is connected to the standard shower hose.

[0016] The expansion angle of the larynx dilation region is a continuous expansion.

[0017] The inner diameter of the throat tube ranges from 5 to 14 mm, and the length of the throat tube is 5 to 8 times its inner diameter.

[0018] The inner wall of the throat expansion zone forms an expansion angle of 5-10° with the extension line of the inner wall, and the outlet diameter of the throat expansion zone is 1.5-4 times its inlet diameter.

[0019] The nozzle has a nozzle cone, and the small end of the nozzle cone is the outlet of the cold water jet.

[0020] The nozzle has a nozzle body and a nozzle tip disposed at the end of the nozzle body.

[0021] The cone angle of the nozzle cone is not less than the cone angle of the needle tip.

[0022] The cone angle of the nozzle tip is in the range of 20-90°, and the cone angle of the nozzle cone is in the range of 30-100°.

[0023] The main body of the nozzle is provided with circumferential ribs as a support. The ribs cooperate with the inner wall of the nozzle to prevent the nozzle from shaking under the impact of cold water flow. Fluid channels are formed between adjacent ribs.

[0024] Multiple ribs are evenly distributed around the main body of the nozzle and extend along its axial direction, and the multiple ribs form the fluid channel with each other.

[0025] The rib includes a first part and a second part, wherein the radial dimension of the first part is smaller than the radial dimension of the second part, and the outer surface of the second part mates with the inner cavity of the nozzle.

[0026] The total cross-sectional area of ​​the fluid channels formed by the ribs is greater than the cross-sectional area of ​​the cold water jet outlet when it is sprayed.

[0027] As the nozzle moves axially, the water pressure at the nozzle's cold water inlet is always consistent with the water pressure at the valve body's cold water inlet.

[0028] The length of the first part is not less than the sum of the length of the nozzle cold water groove in the axial direction of the nozzle and the relative axial travel of the nozzle and the nozzle needle.

[0029] The throat cap includes two threaded parts: one part connects to the valve body, and the other part is a standard threaded interface for a shower hose, which connects to the shower hose. The throat is pressed and installed on the valve body by the throat cap.

[0030] The adjustable jet mixing valve provided by the present invention has the following technical effects:

[0031] This invention provides an adjustable jet mixing valve. A nozzle is disposed within the nozzle, forming a cold water inlet space and a cold water jet outlet between the nozzle and the nozzle. A hot water inlet space is formed between the nozzle and the nozzle. The cold water inlet is connected to both the cold water outlet and the cold water inlet space, and the hot water inlet is connected to both the hot water outlet and the hot water inlet space. In use, the handle is first pulled upwards, causing the nozzle to move along its axis to open the cold water inlet. Then, the handle is rotated, causing the inner square hole rotating cap and grooved wheel sleeve to rotate, thus moving the nozzle axially. This allows for adjustment of the cold water inlet space, the hot water inlet space, and the cold water jet outlet. Specifically, when the nozzle moves, the cross-section of the cold water space decreases, while the cross-section of the hot water space increases. This allows for relatively simple adjustment of the mixing temperature. More importantly, when the cross-section of the cold water space decreases, the cross-sectional area of ​​the cold water jet outlet also decreases, ensuring that even with a low proportion of cold water, the nozzle maintains high water pressure and provides a good spraying effect. Thus, the present invention achieves relatively simple operation and good spraying effect.

[0032] This invention provides an adjustable jet mixing valve, which further includes an inner square hole rotating cover disposed on the valve body. The inner square hole rotating cover is connected to the grooved wheel sleeve to achieve simultaneous rotation. The nozzle's rotation is restricted by a hexagonal guide rail cooperating with the hexagonal guide groove of the grooved wheel sleeve cover. The cam groove of the grooved wheel sleeve cooperates with the cylindrical boss of the nozzle. In use, simply rotating the handle will drive the grooved wheel sleeve to rotate. When the grooved wheel sleeve rotates, the cylindrical boss of the nozzle moves along the cam groove of the grooved wheel sleeve. Because the rotation of the nozzle is restricted, the nozzle achieves axial movement under the action of the cam groove. Thus, the adjustment of the cold water space, hot water space, and cold water jet outlet is achieved through the nozzle, realizing a relatively simple adjustment operation.

[0033] The present invention provides an adjustable jet mixing valve, wherein the spray needle is connected to the lifting rod by a thread, the cylindrical section of the lifting rod is located in the round hole boss of the grooved wheel sleeve cover, and the square section of the lifting rod is connected to the handle through the square hole of the inner square hole rotating cover. When the handle is rotated, the lifting rod rotates with it. Since the lifting rod passes through the square hole of the inner square hole rotating cover, the rotation of the lifting rod also drives the rotation of the inner square hole rotating cover.

[0034] The present invention provides an adjustable jet mixing valve, wherein the grooved wheel sleeve is located in the valve body, and the rotating connecting cylinder of the grooved wheel sleeve passes through the rotating connecting cylinder channel groove of the grooved wheel sleeve cover and connects to the rotating connecting hole of the inner square hole rotating cover. When the inner square hole rotating cover rotates with the lifting rod, it drives the grooved wheel sleeve to rotate, and the rotating connecting cylinder moves within the rotating connecting cylinder channel groove without driving the grooved wheel sleeve cover to rotate.

[0035] This invention provides an adjustable jet mixing valve. The valve body is connected to the front end along the direction of cold water jetting, and the throat is connected to the small end of the throat expansion area. When cold water is ejected from the cold water jet outlet along the front end of the nozzle, the cold water jet outlet has the smallest cross-section in the entire flow channel, resulting in minimal pressure loss before it. Therefore, the cold water jet outlet can fully convert the cold water pressure into water velocity, giving the cold water ejected from the outlet a good speed. At this time, a negative pressure is formed around the cold water in the part where the throat connects to the hot water space due to the high-speed jetting and entrainment effect of the cold water, thereby drawing in hot water. The throat design ensures that the drawn-in hot and cold water are fully mixed and that sufficient energy is transferred. The inner diameter of the throat ranges from 5 to 14 mm, and the length of the throat is 5 to 8 times its inner diameter. The function of the throat expansion zone is to reduce the flow velocity of the outflowing water and convert the kinetic energy of the mixed water at the outlet into pressure energy. The extension lines of the outer and inner walls of the throat expansion zone form an expansion angle of 5-15°. This expansion angle is continuous, ensuring that velocity is gradually converted into pressure, resulting in better performance. The diameter ratio of the outlet to the inlet of the throat expansion zone is 1.5-4.

[0036] This invention provides an adjustable jet mixing valve. The grooved sleeve has cold water and hot water panes. The cold water pane connects the cold water inlet to the cold water slot on the nozzle, while the hot water pane connects the hot water inlet to the hot water space. A sealing ring groove is provided on the nozzle for installing a sealing ring. The sealing ring engages with the inner wall of the valve body, separating the hot water and cold water panes, and thus separating the cold water and hot water spaces. A nozzle needle is disposed within the nozzle, engaging with the inner wall of the nozzle via its ribs. Multiple ribs are evenly distributed around the nozzle body and extend axially, forming fluid channels with each other. Each rib includes a first portion and a second portion, wherein the radial dimension of the first portion is smaller than that of the second portion, and the outer surface of the second portion engages with the inner cavity of the nozzle. The radial dimension of the first portion is smaller than that of the second portion. The first part corresponds to the nozzle inlet, and its radial dimension is smaller than that of the second part. In order to form a water passage on the inner wall of the nozzle, the water inlet of the nozzle is evenly introduced into the fluid passage formed by the ribs, thereby ensuring that the cross-sectional area of ​​the fluid passage is larger than the cross-section of the cold water jet outlet of the nozzle, ensuring that the cold water pressure is not lost before the cold water jet outlet of the nozzle, and the jetting effect is better.

[0037] This invention provides an adjustable jet mixing valve for a valve core nozzle. The nozzle body has circumferentially ribbed, so that when the nozzle is assembled in the nozzle of the valve core, the outer surface of the rib will cooperate with the inner cavity of the nozzle to limit the nozzle body. A flow channel is formed between the ribs, so that when the pressure of the fluid passing through the nozzle is large or very large and the fluid flow rate is unstable, it can effectively prevent the nozzle from deviating from the cold water jet outlet of the nozzle or oscillating radially due to large and uneven radial pressure in the radial direction, without affecting the smooth flow of the fluid, thus affecting the spraying effect of the nozzle.

[0038] The present invention provides an adjustable jet mixing valve for a nozzle core, wherein a plurality of ribs are evenly distributed around the nozzle body and extend along its axial direction, forming a fluid channel between the plurality of ribs to facilitate fluid flow. Furthermore, each rib includes a first rib portion and a second rib portion, wherein the radial dimension of the first rib portion is smaller than the radial dimension of the second rib portion, thereby further enhancing the spraying effect of the nozzle. Attached Figure Description

[0039] To make the invention easier to understand, the invention will be described in further detail below with reference to the accompanying drawings, wherein:

[0040] Figure 1 A three-dimensional structural diagram showing the mixing valve body, handle, spherical cap, and throat of Embodiment 1;

[0041] Figure 2 This is a cross-sectional view of the structure of Embodiment 1;

[0042] Figure 3 A schematic diagram showing the structure of the valve core formed by the assembly of the spray needle, nozzle, and rotating component of the present invention;

[0043] Figure 4 A schematic diagram showing the mating structure of the valve core and throat of the present invention;

[0044] Figure 5 A three-dimensional structural diagram showing the fit between the grooved wheel sleeve cap, the grooved wheel sleeve, and the lifting rod of the present invention;

[0045] Figure 6 A schematic diagram showing the structure of the grooved wheel sleeve gland of the present invention;

[0046] Figure 7 A schematic diagram showing the structure of the nozzle of the present invention;

[0047] Figure 8 A schematic diagram showing the structure of the nozzle of the present invention;

[0048] Figure 9 A schematic diagram showing the structure of the grooved wheel sleeve of the present invention;

[0049] Figure 10 A three-dimensional structural diagram showing the fit between the valve core and the throat tube of the present invention;

[0050] Figure 11 This is an exploded view showing the valve core of the present invention unfolded along its axis.

[0051] Explanation of reference numerals in the attached figures:

[0052] A-Mixing valve body; A1-Cold water inlet; A2-Hot water inlet; A3-Cold water inlet; A4-Hot water inlet; A5-Hot water space; A6-Cold water space; A7-Mixing outlet; A8-Hot water suction outlet; A9-Cold water jet outlet; B-Valve core; B1-Anti-rotation notch; B2-Cold water window pane; B3-Hot water window pane; 1-Valve body; 2-Groove sleeve; 21-Rotating connecting cylinder; 22-Cam groove; 3-Groove sleeve cap; 31-Round hole boss; 32-Hexagonal guide groove; 33-Rotating... 4-Nozzle; 41-Hexagonal guide groove; 42-Nozzle cold water inlet; 43-Cylindrical boss; 44-Nozzle cone; 5-Throat cap; 6-Needle; 61-Rib; 61a-First part of rib; 61b-Second part of rib; 62-Fluid channel; 63-Needle cone tip; 7-Throat; 71-Throat expansion area; 8-Lifting rod; 81-Square rod section; 82-Cylindrical section; 9-Inner square hole rotating cap; 91-Rotating connection hole; 10-Spherical cap; 11-Handle. Detailed Implementation

[0053] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] Example 1

[0055] like Figure 2 and Figure 4As shown, the present invention provides an adjustable jet mixing valve, including a mixing valve body A, a valve core B, a throat 7, and a throat cap 5. The mixing valve body A has a cold water inlet A1, a hot water inlet A2, a cold water inlet A3, a hot water inlet A4, and a mixing outlet A7. The cold water inlet A1 and the hot water inlet A2 are respectively connected to a cold water pipe and a hot water pipe. The mixing valve core B has a cold water window pane B2 and a hot water window pane B3, wherein the cold water window pane B2 is connected to the cold water inlet A3, and the hot water window pane B3 is connected to the hot water inlet A4. After passing through the cold water window pane B2, the cold water inlet A3 forms a cold water space A6 within the valve core B, and after passing through the hot water window pane B3, the hot water inlet A4 forms a hot water space A5 within the valve core B. The hot water space A5 forms a hot water intake outlet A8 between the nozzle cone 44 and the throat 7, and the cold water space A6 forms a cold water jet outlet A9 between the nozzle tip 63 and the nozzle mouth. The mixing ratio of hot and cold water is adjusted by changing the size of the hot water intake outlet A8 and the cold water jet outlet A9 by adjusting the position of the nozzle 6 and the nozzle 4 in the axial direction. The throat 7 is connected to a standard shower hose.

[0056] In this embodiment, the pull handle 11 is used to adjust the cold water jet outlet A9, and the rotation handle 11 is used to adjust the hot water suction outlet A8.

[0057] like Figure 3 As shown, the spray needle 6 is connected to the lifting rod 8 via a thread. The lifting rod 8 is connected to the handle 11. When the handle 11 is pulled, the spray needle 6 moves axially, thereby opening the cold water jet outlet A9 and changing the size of the cold water jet outlet A9. When the handle 11 is rotated, the lifting rod 8 rotates with the handle 11. The square rod segment 81 on the lifting rod 8 engages with the inner square hole of the inner square hole rotating pressure cover 9, driving the inner square hole rotating pressure cover 9 to rotate. The rotating connecting hole 91 on the inner square hole rotating pressure cover 9 engages with the rotating connecting cylinder 21 on the grooved wheel sleeve 2, so that the grooved wheel sleeve 2 rotates with the handle 11. The grooved wheel sleeve 2 has a cam groove 22, which engages with the cylindrical boss 43 on the nozzle 4. When the grooved wheel sleeve 2 rotates with the handle 11, the cylindrical boss 43 on the nozzle 4 moves in the cam groove 22 of the grooved wheel sleeve 2. The nozzle 4 is engaged with the hexagonal guide groove 32 of the grooved wheel sleeve cover 3 via the hexagonal guide rail 41, thereby restricting the rotation of the nozzle 4 around the axis. As a result, when the grooved wheel sleeve 2 rotates, the nozzle 4 moves along the axis by following the rise angle of the cam groove 22 of the grooved wheel sleeve 2, thereby opening the hot water suction outlet A8 and changing the size of the hot water suction outlet A8 and the cold water jet outlet A9.

[0058] like Figure 3 and 5As shown, the valve core B of the jet mixing valve has a grooved wheel sleeve 2, a nozzle 4, a spray needle 6, a grooved wheel sleeve cap 3, an inner square hole rotating cap 9, and a lifting rod 8. The grooved wheel sleeve cap 3 has a hexagonal guide groove 32 that cooperates with the nozzle 4 to restrict its rotation. The grooved wheel sleeve cap 3 has a rotating cylindrical channel groove 33 and an anti-rotation notch B1 on its edge. The grooved wheel sleeve cap 3 is installed inside the valve body 1. Due to the anti-rotation notch B1, the grooved wheel sleeve cap 3 will not rotate around its own axis. The rotating cylindrical part 21 of the grooved wheel sleeve 2 passes through the rotating cylindrical channel groove 33 and cooperates with the rotating connection hole 91 of the inner square hole rotating cap 9. Due to the presence of the channel groove, the rotation of the grooved wheel sleeve 2 will not affect the grooved wheel sleeve cap 3.

[0059] like Figure 3 and 10 As shown, the grooved sleeve 2 has a cold water window B2 and a hot water window B3. Inside the grooved sleeve 2, the seal on the nozzle 4 separates the cold water window B2 and the hot water window B3. In order to ensure that the cold water window B2 and the hot water window B3 do not connect during the movement of the nozzle 4, the axial distance between the cold water window B2 and the hot water window B3 needs to be greater than the axial movement distance of the nozzle 4.

[0060] like Figure 3 and 8 As shown, the nozzle needle 6 is mounted inside the nozzle 4, and is supported by ribs 61 and a seal to prevent it from wobbling inside the nozzle 4. The ribs 61 extend axially along the body of the nozzle 4, and each rib has a first portion 61a and a second portion 61b. The radial diameter of the first portion 61a is smaller than the radial diameter of the second portion 61b, forming a fluid channel 62 between adjacent ribs 61. The axial length of the second portion 61b is smaller than the axial length of the first portion 61a. The axial length of the first portion 61a is the sum of the length of the cold water inlet 42 of the nozzle 4 in the axial direction of the nozzle needle 6 and the axial stroke of the nozzle 4.

[0061] To ensure a better spraying effect, the total cross-sectional area of ​​the fluid channel 62 is larger than the cross-sectional area of ​​the cold water jet outlet A9 of the nozzle 4 when it sprays.

[0062] like Figure 7As shown, the nozzle 4 includes a cylindrical body with an inner cavity. A cold water inlet 42 is formed on the side wall of the cylindrical body for cold water inflow. One section of the cylindrical body is directly formed with a hexagonal guide rail 41 with an inner cavity. When the nozzle 4 is installed inside the grooved wheel sleeve cover 3, the edge of the hexagonal guide rail 41 engages with the hexagonal guide groove 32 on the inner wall of the grooved wheel sleeve cover 3, preventing the nozzle 4 from rotating relative to the grooved wheel sleeve cover 3. A nozzle cone 44 is formed at the other end of the cylindrical body. The cone angle of the nozzle cone 44 is 90°. The inner cavity of the nozzle 4 is also a cone-shaped inner cavity in this cone section, with a cone angle of 60°. The cone angle of the cone portion of the nozzle 4's inner cavity is always smaller than the cone angle of the cone portion of the nozzle 4's main body.

[0063] The diameter of the cold water jet outlet A9 can vary within the range of 3-10 mm, preferably within the range of 4-6 mm. The diameter of the cold water jet outlet A9 should be the same as the diameter of the cylindrical part on the conical side of the nozzle 6, and the cold water jet outlet A9 should match the cylindrical part on the conical side of the nozzle 6.

[0064] like Figure 2 As shown, the adjustable jet mixing valve also includes a throat 7 installed on the valve body 1 along the direction of the cold water jet. The throat 7 is a certain distance from the cold water jet outlet A9, which is less than the distance the nozzle 4 moves along the axis of the grooved sleeve 2. The end of the throat 7 is formed with a tapered portion, which is adapted to cooperate with the nozzle cone 44. That is, the cross-sectional area formed by the nozzle 4 and the tapered portion of the throat 7 is larger than the cross-sectional area of ​​the inner hole of the throat 7. The larger opening of the tapered portion faces the nozzle cone 44. The throat 7 is further connected to the throat expansion region 71. The inner diameter of the throat expansion region 71 and the root of the throat 7 connected to the end of the mixing port are continuously increased. The inner diameter of the throat 7 is 10 mm. The length of the throat 7 is 8 times its inner diameter. The inner wall of the throat expansion region 71 and the extension line of the inner wall of the throat 7 form an expansion angle of 8°. The outlet diameter of the throat expansion region 71 is 1.5 times its inlet diameter.

[0065] like Figure 4 As shown, in this embodiment, the function of the throat expansion zone 71 is to convert a portion of the kinetic energy of the mixed water at the outlet of the throat 7 into pressure energy. During the energy conversion process, there is diffusion loss, and the amount of diffusion loss is related to the distribution of the inlet velocity of the throat expansion zone 71, the size of the diffusion angle, and the diameter ratio of the diffusion section. As a preferred embodiment of this implementation, the diffusion angle β is 5-8°, but not limited to 5-8°. To further reduce diffusion loss, segmented diffusion pipe sections can also be used in this embodiment, wherein the diffusion angle is preferably β=2°, 4°, or 13°, and the diffusion angle β can also be selected as 1°, 3°, 12°, or other multiple angles used in combination.

[0066] During installation, connect the lifting rod 8 and the spray needle 6 together via threads and insert them into the inner cavity of the nozzle 4; slide the grooved sleeve 2 downwards along the axis onto the outside of the nozzle 4, ensuring that the end notch of the cam groove 22 is aligned with the cylindrical boss 43 of the nozzle 4, and move it downwards until the cylindrical boss 43 of the nozzle 4 contacts the cam groove 22 and slides into the cam groove 22; then, align the hexagonal guide groove 32 of the grooved sleeve cap 3 with the hexagonal guide rail of the nozzle 4. 41. Install the hexagonal guide rail 41 into the hexagonal guide groove 32. Note that the rotating connecting cylinder 21 of the grooved wheel sleeve 2 should pass through the rotating connecting cylinder channel groove 33 on the grooved wheel sleeve cover 3. Next, install the inner square hole rotating cover 9. First, pass the square rod section 81 of the lifting rod 8 through the square hole of the inner square hole rotating cover 9. Then, align the rotating connecting hole 91 on the inner square hole rotating cover 9 with the rotating connecting cylinder 21 of the grooved wheel sleeve 2 and insert it to complete the installation. This forms... Figure 3 The valve core B is shown. The installed valve core B is inserted into the valve body 1, and the anti-rotation notch B1 of the grooved wheel sleeve cap 3 is aligned with the notch inside the valve body 1, thus preventing the valve core B from rotating relative to the valve body 1. The spherical cap 10 is threaded onto the valve body 1, with its lower end face pressing against the grooved wheel sleeve cap 3, restricting its movement along the axis. The handle 11 is installed on the lifting rod 8, and the two are connected by a pin. Finally, the throat 7 is installed, and the throat cap 5 is threaded onto the valve body 1, with its upper end face pressing against the throat 7, restricting its axial movement.

[0067] like Figure 2 and Figure 4 As shown, the valve body 1 has a cold water inlet A1 and a hot water inlet A2 that are connected to cold water and hot water respectively. The cold water inlet A3 on the valve body 1 is connected to the cold water window pane B2 on the grooved wheel sleeve 2. Then, the cold water groove 42 on the nozzle 4 enters the inner cavity of the nozzle 4. The nozzle needle 6 in the inner cavity of the nozzle 4 has a fluid channel 62 formed between the protruding ribs 61. The cold water reaches the cold water space A6 formed by the nozzle 4 and the nozzle needle 6 through the fluid channel 62 on the nozzle needle 6, and finally enters the throat 7 through the cold water jet outlet A9. The hot water inlet A4 on the valve body 1 is connected to the hot water window pane B3 on the grooved wheel sleeve 2. Then, the hot water enters the hot water space A5 formed by the nozzle 4, the valve body 1 and the throat 7, and enters the throat 7 through the hot water suction outlet A8 to mix with the cold water.

[0068] In use, first pull the handle 11 upwards to move the lifting rod 8 axially. Since the lifting rod 8 is connected to the spray needle 6 by a thread, the spray needle 6 moves axially with the lifting rod 8, opening the cold water jet outlet A9 and connecting the cold water space A6 and the cold water jet outlet A9 to achieve cold water jetting. Then rotate the handle 11. Because the square rod section 81 of the lifting rod 8 matches the inner square hole of the inner square hole rotating cover 9, the rotation of the lifting rod 8 drives the inner square hole rotating cover 9 to rotate together. Since the rotating connection hole 91 of the inner square hole rotating cover 9 matches the rotating connection cylinder 21 of the grooved wheel sleeve 2, the grooved wheel sleeve 2 also rotates together. The grooved wheel sleeve cover 3 is locked inside the valve body 1 through the anti-rotation notch B1. Furthermore, because the hexagonal guide rail 41 on nozzle 4 cooperates with the hexagonal guide groove 32 of the grooved wheel sleeve cover 3, the rotation of nozzle 4 around its axis is restricted. The cylindrical boss 43 on nozzle 4 is installed in the cam groove of the grooved wheel sleeve 2. When the grooved wheel sleeve 2 rotates, the cylindrical boss 43 on nozzle 4 moves with the grooved wheel. Because the rotation of nozzle 4 around its axis is restricted, when the grooved wheel sleeve 2 rotates, nozzle 4 moves axially accordingly. When nozzle 4 moves upward, hot water suction outlet A8 opens, connecting hot water space A5 and hot water suction outlet A8. When cold water is jetted, the velocity and pressure at cold water jet outlet A9 are high, and hot water is drawn out, thus pressurizing the hot water. The up-and-down movement of nozzle 4 changes the cross-sectional area of ​​cold water jet outlet A9 and hot water suction outlet A8, thereby adjusting the mixing ratio of hot and cold water. During this process, the water pressure at the cold water inlet 42 on the nozzle 4 always corresponds to the cold water inlet of the valve body 1, thereby ensuring that the water pressure at the cold water inlet 42 is always equivalent to the water pressure at the cold water inlet A3 and the cold water outlet A1.

[0069] It should be noted that the correspondence between the cold water inlet 42 on the nozzle 4 and the cold water inlet A3 of the valve body 1 means that throughout the entire axial movement of the nozzle 4, the water pressure at the cold water inlet 42 of the nozzle 4 always corresponds to the water pressure at the cold water inlet A3 of the valve body 1. That is, the cold water inlet 42 of the nozzle 4 always has a water pressure that ensures a good spraying effect. To achieve this technical effect, during the axial movement of the nozzle 4, the cold water inlet 42 of the nozzle 4 must always be within the range of the cold water inlet A3 of the valve body 1, or the cold water inlet A3 of the valve body 1 must always be within the range of the cold water inlet 42 of the nozzle 4.

Claims

1. An adjustable jet mixing valve, comprising: The mixing valve body (A) has a cold water inlet (A1), a hot water inlet (A2), a cold water inlet (A3), a hot water inlet (A4), and a mixing outlet (A7). The cold water inlet (A1) and the hot water inlet (A2) are respectively connected to the cold water pipe and the hot water pipe. The mixing outlet (A7) is connected to the water outlet pipe through the throat pipe (7). The adjustable jet mixing valve core (B) has a lifting rod (8), an inner square hole rotating pressure cap (9), a grooved wheel sleeve pressure cap (3), a grooved wheel sleeve (2), a nozzle (4), and a spray needle (6), which are installed inside the valve body (1). The grooved wheel sleeve (2) has a cold water window (B2) and a hot water window (B3), which are respectively connected to the cold water inlet (A3) and the hot water inlet. (A4) is connected, the nozzle (4) and the spray needle (6) are disposed in the grooved wheel sleeve (2), the spray needle (6) is disposed in the nozzle (4), a cold water space (A6) and a cold water jet outlet (A9) are formed between the nozzle (4) and the spray needle (6), a hot water space (A5) is formed between the nozzle (4) and the grooved wheel sleeve (2), a hot water suction outlet (A8) is formed between the nozzle (4) and the throat (7), the cold water inlet (A3) is connected to the cold water outlet (A1) and the cold water space (A6) respectively, and the hot water inlet (A4) is connected to the hot water outlet (A2) and the hot water space (A5) respectively; characterized in that: The position of the nozzle (6) along the axis of the nozzle (4) is adjustable, and it moves along the axis following the movement of the lifting rod (8). The position of the nozzle (4) along the axis of the grooved wheel sleeve (2) is adjustable. The cylindrical boss (43) outside the nozzle (4) engages with the cam groove (22) on the grooved wheel sleeve (2). The rotating connecting cylinder (21) on the grooved wheel sleeve (2) passes through the rotating connecting cylinder channel groove (33) on the grooved wheel sleeve cover (3) and connects with the rotating connecting hole (91) on the inner square hole rotating cover (9). The square through hole on the inner square hole rotating cover (9) engages with the square rod segment (81) above the lifting rod (8), thereby rotating the lifting rod (8) and driving the inner square hole rotating cover (9). The grooved sleeve (2) rotates and is fixed in the axial direction of the adjustable jet mixing valve core (B). By rotating and pulling the lifting rod (8), the relative positions of the nozzle (4) and the spray needle (6) on the axis of the grooved sleeve (2) can be adjusted to adjust the cold water space (A6), the hot water space (A5), the cold water jet outlet (A9) and the hot water suction outlet (A8). When the lifting rod is rotated to the limit position and pressed down, the cylindrical part of the spray needle cone tip (63) at the end of the main body of the spray needle (6) cooperates with the through hole below the nozzle (4) to close the cold water space. At the same time, the nozzle cone (44) of the nozzle (4) cooperates with the chamfer at the inlet above the throat to close the hot water space.

2. The adjustable jet mixing valve according to claim 1, characterized in that: The nozzle (6) is connected to the lifting rod (8) by a thread and moves axially within the nozzle (4) following the lifting rod (8). The lifting rod (8) is composed of a square rod section (81) and a cylindrical section (82). The grooved wheel sleeve cover (3) includes a hexagonal guide groove (32), a rotary connecting cylindrical channel groove (33), an anti-rotation notch (B1), and a round hole boss (31). The grooved wheel sleeve cover (3) cooperates with the valve body (1) through the anti-rotation notch (B1) and does not rotate relative to the axis of the valve body (1). The hexagonal guide rail (41) on the nozzle (4) cooperates with the hexagonal guide groove (32) on the grooved wheel sleeve cover (3) to realize that the hexagonal guide rail (41) moves along the axial direction of the hexagonal guide groove (32) on the grooved wheel sleeve cover (3) and restricts the relative rotation of the nozzle (4) along the axis of the valve body (1).

3. The adjustable jet mixing valve according to claim 2, characterized in that: A spherical cap (10) is installed on the top of the valve body (1). One end of the spherical cap (10) is spherical and the other end is threaded. The thread of the spherical cap (10) is matched with the threaded hole at the top of the valve body (1) and presses against the grooved wheel sleeve cap (3). There is a certain gap between the boss end face of the hole of the spherical cap (10) and the inner square hole rotating cap (9) to prevent self-locking.

4. The adjustable jet mixing valve according to claim 3, characterized in that: The grooved sleeve (2) has the cold water window (B2) and the hot water window (B3). The distance between the solid parts of the cold water window (B2) and the hot water window (B3) should be greater than the axial movement distance of the nozzle (4). The axial length of the cold water window (B2) and the hot water window (B3) should be slightly greater than the axial length of the cold water inlet (A3) and the hot water inlet (A4). The cold water jet outlet (A9) and the hot water suction outlet (A8) of the adjustable jet mixing valve core (B) are connected to the throat (7). The throat (7) is connected to the small end of the throat expansion area (71). The large end of the throat expansion area (71) is connected to the standard shower hose.

5. The adjustable jet mixing valve according to claim 4, characterized in that: The small end of the nozzle cone (44) on the nozzle (4) is the cold water jet outlet (A9); the nozzle (6) has a nozzle body and a nozzle cone tip (63) disposed at the end of the nozzle body; the cone angle of the nozzle cone (44) is not less than the cone angle of the nozzle cone tip (63); the cone angle of the nozzle cone tip (63) is in the range of 20-90°, and the cone angle of the nozzle cone (44) is in the range of 30-100°.

6. The adjustable jet mixing valve according to claim 5, characterized in that: The main body of the nozzle (6) is provided with convex ribs (61) along the circumference as a support. The convex ribs (61) cooperate with the inner wall of the nozzle (4) to prevent the nozzle (6) from shaking under the impact of the cold water inflow. A fluid channel (62) is formed between adjacent convex ribs (61). The total cross-sectional area of ​​the fluid channel (62) formed between the convex ribs (61) is greater than the cross-sectional area of ​​the cold water jet outlet (A9) when it is sprayed.

7. The adjustable jet mixing valve according to claim 6, characterized in that: The rib (61) includes a first part (61a) and a second part (61b), wherein the radial dimension of the first part (61a) is smaller than the radial dimension of the second part (61b), the outer surface of the second part (61b) mates with the inner cavity of the nozzle (4), and the length of the first part (61a) is not less than the sum of the length of the nozzle cold water slot (42) of the nozzle (4) in the axial direction of the nozzle needle (6) and the relative axial stroke of the nozzle (4) and the nozzle needle (6).

8. The adjustable jet mixing valve according to claim 7, characterized in that: When the nozzle (4) moves along the axial direction, the water pressure at the nozzle cold water inlet (42) of the nozzle (4) is always consistent with the water pressure at the cold water inlet (A3) of the valve body (1).

9. The adjustable jet mixing valve according to claim 8, characterized in that: The throat cap (5) installed below the valve body (1) includes two pipe threads, one part of which is connected to the valve body (1), and the other part is a standard pipe thread interface for a shower hose, which is connected to the shower hose. The throat (7) is pressed and installed on the valve body (1) by the throat cap (5).

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