A pull-out low-flow regulating faucet

Abstract

The present invention discloses a pull-out low-flow regulating faucet, belonging to the technical field of flow regulation, and solves the problem that when the pull-out head is not pulled down, once the water flow mode enters the shower mode, the tap water splashing on the object will even spray to a position outside the sink. It includes a faucet pipe and a pull-out head communicated with the faucet pipe through a pull-out hose. The pull-out head is detachably connected to the faucet pipe. The pull-out head has a switchable bubble water mode and shower mode, and a distance control circuit is arranged on the pull-out head. When the pull-out faucet of the present invention discharges water, the bubble water mode is mainly adopted to avoid splashing caused by too fast water flow. The user can pull down the nozzle and press the button to switch the water from the first flow channel to the second flow channel, realizing the conversion from the bubble water mode to the shower mode. Adjusting the slide potentiometer can manually control the water flow rate and velocity to clean the articles. After the pull-out head returns to its position, the water flow automatically decreases and switches back to the bubble mode to prevent splashing.

Description

Technical Field

[0001] The present invention relates to the technical field of flow regulation, and particularly to a pull-out low-flow regulating faucet. Background Art

[0002] A pull-out faucet is a modern kitchen faucet that is favored by users for its flexibility and convenience. The design of this faucet allows users to release the spray head of the faucet from its fixed position by pulling it, enabling them to freely move around the sink and providing a larger range of use. A pull-out faucet is usually equipped with a retractable hose, allowing the spray head to be easily pulled out and pushed back, facilitating the cleaning of all corners of the sink or rinsing different items in the kitchen.

[0003] In addition to its flexibility, a pull-out faucet is often equipped with a multi-functional spray head that can provide different water flow patterns, such as a soft bubbly water pattern and a strong shower water pattern. These patterns can be easily switched through a switch or button on the faucet to meet the needs of users in different scenarios. For example, the bubbly water pattern is suitable for daily handwashing and facewashing, while the shower water pattern is more suitable for quick rinsing or cleaning tasks.

[0004] The installation of a pull-out faucet is usually relatively simple and can be adapted to most standard sinks. They not only enhance the aesthetics of the home but also have become a popular choice for modern home decoration due to their practicality and innovative design. Whether preparing food in the kitchen or enjoying a relaxing moment in the bathroom, a pull-out faucet can provide additional convenience and a comfortable experience.

[0005] However, in the actual use process, people switch between the two water flow patterns through a switching key on the pull-out head. However, usually, due to the strong water flow in the shower mode, a large amount of tap water will splash when it is sprayed on an object. Therefore, people need to manually press the switching key back each time after use to switch the water flow pattern from the shower mode back to the bubbly water mode. Moreover, when the pull-out head is not pulled down, once the water flow pattern enters the shower mode, the tap water that splashes when sprayed on an object may even spray outside the sink. Therefore, the current pull-out faucet is inconvenient to use and easily wets the environment.

[0006] In the prior art, there is a pull-out faucet with the application number CN202110535791.8. The technical key points are as follows: It includes a faucet body, a pull-out hose, an automatic water outlet control unit, and a pull-out induction structure. The pull-out hose is slidably arranged in the faucet body. The water inlet end of the pull-out hose is connected to the water outlet end of the automatic water outlet control unit. Its characteristics are as follows: The pull-out induction structure includes an induction mark and an inductor. The number of induction marks is at least two, which are arranged on the pull-out hose at intervals along the length direction of the pull-out hose. The induction marks located at both ends in the length direction are defined as the upper induction mark and the lower induction mark respectively. The inductor is used to sense the movement of the induction marks. During the process of pulling out the pull-out hose, at least the upper induction mark and the lower induction mark can move with the pull-out hose and be sensed by the inductor. Thus, during the process of pulling out and retracting the pull-out hose, a first group of induction signals and a second group of induction signals are generated respectively. The automatic water outlet control unit controls its water outlet end to change the water outlet strategy accordingly according to the first group of induction signals or the second group of induction signals; changing the water outlet strategy is to turn on the water outlet and turn off the water outlet; when the number of induction marks is two, the specific way that the automatic water outlet control unit controls its water outlet end to change the water outlet strategy according to the first group of induction signals or the second group of induction signals is as follows: When the two spaced induction mark movement signals when the automatic water outlet control unit is in the state of turning off the water outlet are the first group of induction signals, then the water outlet is controlled to turn on after a delay from the first induction mark movement signal to the second induction mark movement signal; when the two spaced induction mark movement signals when the automatic water outlet control unit is in the state of turning on the water outlet are the second group of induction signals, then the water outlet is controlled to turn off after the first induction mark movement signal, and the water outlet is maintained in the off state and the position is reset after the second induction mark movement signal.

[0007] Compared with the prior art, the above solution can have a more flexible and variable control strategy. For example, it can avoid the problem that water comes out immediately when the pull-out head is pulled out and the water is turned off only after the pull-out head is reset, which may cause water to splash everywhere, affecting the use experience and being not conducive to water conservation. Therefore, the present solution proposes a pull-out low-flow regulating faucet to solve the problem that when the pull-out head is not pulled down and once the water flow mode enters the shower mode, the tap water sprayed on the object may even splash outside the sink.

[0008] Therefore, a pull-out low-flow regulating faucet is proposed to solve or alleviate the above problems. Summary of the Invention

[0009] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a pull-out low-flow regulating faucet is proposed.

[0010] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0011] A pull-out low-flow regulating faucet, comprising a faucet pipe and a pull-out head communicated with the faucet pipe through a pull-out hose, wherein the pull-out head is detachably connected to the faucet pipe, the pull-out head has a switchable bubble water mode and a shower mode, and a distance control circuit is arranged on the pull-out head. The distance control circuit controls the mode of the pull-out head according to whether the height of the pull-out head is lower than a height threshold. When the height of the pull-out head is greater than the height threshold, the pull-out head only maintains the bubble water state. When the height of the pull-out head is lower than the height threshold, the pull-out head can switch between the bubble water mode and the shower mode. The water flow rate of the pull-out head in the shower mode can be adjusted. When the height of the pull-out head changes from being lower than the height threshold to being greater than the height threshold, the pull-out head returns to the lowest water flow rate and switches back to the bubble water mode.

[0012] Preferably, the pull-out head includes a housing, a three-way solenoid valve arranged in the housing, and a bubble water outlet head and a shower water outlet head communicated with the three-way solenoid valve. A button switch and a slide button are arranged on the housing. The three-way solenoid valve is coupled to the distance control circuit through the button switch and the slide button. The button switch is used to switch between the bubble water mode and the shower mode, and the slide button is used to adjust the water flow rate of the pull-out head in the shower mode.

[0013] Preferably, the three-way solenoid valve includes a sleeve, an inflow part and an outflow part fixedly connected to both ends inside the sleeve. One end of the inflow part away from the sleeve is communicated with an insertion pipe part. An inflow channel is arranged inside the inflow part. First and second flow channels respectively communicated with the bubble water outlet head and the shower water outlet head are arranged inside the outflow part. A V-shaped sphere for adjusting the water flow rate passing through the three-way solenoid valve is rotatably arranged inside the inflow channel. An electric actuator fixedly connected to the outer circle of the sleeve and coupled to the distance control circuit through the slide button is provided. A valve rod penetrating into the inflow channel is fixedly connected to the drive shaft of the electric actuator. A support pipe is fixedly connected to the outer circle of the sleeve. One end of the support pipe away from the sleeve is detachably connected to a connecting pipe. A partition is fixedly connected inside the connecting pipe. An adjustment electromagnet located inside the connecting pipe and coupled to the distance control circuit through the button switch is fixedly connected to the partition. One end of the connecting pipe away from the support pipe is detachably connected to a cover. A limiting plate is slidably connected inside the support pipe. A metal spring is fixedly connected between the limiting plate and the partition. One side of the limiting plate away from the partition is fixedly connected to a vertical rod penetrating into the sleeve. A plurality of support columns are fixedly connected to one end of the vertical rod away from the limiting plate. The plurality of support columns are jointly fixedly connected to a sealing plate. The sealing plate is arranged in a manner of fitting the end face of the outflow part, and the sealing plate only shields the inlet of the first flow channel or the second flow channel at a time.

[0014] Preferably, an external thread is provided on the outer circumference of the intubation part. The inflow part and the outflow part are both threadedly connected to the inner sides of the two ends of the sleeve. The support pipe and the connecting pipe are also threadedly connected. An internal thread is provided on the inner circumference of the end of the connecting pipe away from the support pipe. The connecting pipe is threadedly connected to the cover through the internal thread. The top surface and the back surface of the sealing plate are set as planes, and the width of the sealing plate is gradually increased starting from the side facing the inflow part.

[0015] Preferably, the distance control circuit includes

[0016] a distance detection circuit, which is arranged on the draw head. The distance detection circuit detects the height of the draw head and outputs a distance judgment signal after the height is lower than the height threshold;

[0017] a self-breaking circuit, the controlled end of the self-breaking circuit is coupled to the output end of the distance detection circuit, and the self-breaking circuit controls the energization of its output end in response to the distance judgment signal;

[0018] a first relay, the switch of the first relay connects the push-button switch and the adjustment electromagnet to the power supply. The controlled end of the first relay is coupled to the self-breaking circuit, and the switch of the first relay controls the energization of the circuit where the adjustment electromagnet is located after being controlled by the self-breaking circuit.

[0019] Preferably, the distance detection circuit includes a distance sensor and a voltage comparator coupled to the output end of the distance sensor. The self-breaking circuit includes a first triode switch. The base of the first triode switch is coupled to the output end of the voltage comparator. The collector of the first triode switch is powered on, and the emitter of the first triode switch is connected to the first relay and then grounded.

[0020] Preferably, the sliding button is a sliding potentiometer. The sliding potentiometer is connected to the power supply through the push-button switch. The distance control circuit further includes

[0021] a voltage sensor, which detects the voltage of the circuit where the sliding potentiometer is located and outputs a voltage signal;

[0022] a signal conditioning circuit, the input end of the signal conditioning circuit is coupled to the output end of the voltage sensor. The signal conditioning circuit receives the voltage signal for secondary arithmetic amplification and outputs a voltage amplified signal;

[0023] a microcontroller, the output end of the signal conditioning circuit is coupled to the input end of the microcontroller. The output end of the microcontroller is coupled to the input end of the electric actuator. The microcontroller controls the rotation angle of the drive shaft of the electric actuator in response to the voltage amplified signal.

[0024] Preferably, the signal conditioning circuit includes a first operational amplifier and a second operational amplifier. The input terminal of the second operational amplifier is coupled to the output terminal of the first operational amplifier, and the input terminal of the first operational amplifier is coupled to the output terminal of the voltage sensor.

[0025] Preferably, the distance control circuit further includes

[0026] a recovery electromagnet disposed within the pull head. The movable end of the linear potentiometer is made of a metal material, and the recovery electromagnet is energized to attract the movable end of the linear potentiometer;

[0027] a delay circuit. The input terminal of the delay circuit is electrically connected. After the delay circuit is charged, it outputs a delay signal;

[0028] a second relay. The controlled terminal of the second relay is coupled to the output terminal of the delay circuit, and the switch of the second relay is connected between the power supply and the recovery electromagnet;

[0029] a third relay. The controlled terminal of the third relay is connected in series with the loop where the controlled terminal of the first relay is located, and the switch of the third relay is connected between the power supply and the input terminal of the delay circuit.

[0030] Preferably, the delay circuit includes an RC delay circuit and a second transistor switch. The base of the second transistor switch is coupled to the output terminal of the RC delay circuit. The collector of the second transistor switch is connected to the controlled terminal of the second relay and then electrically connected, and the emitter of the second transistor switch is grounded.

[0031] The present invention has the following beneficial effects:

[0032] When the pull head in the present invention is actually applied, if water is passed through, it can mainly discharge water in the bubble water mode. In this way, it can ensure that the flow rate of the water sprayed out by the pull head will not be too fast, and it can also avoid the problem of water splashing around when the water flow hits an object due to the too fast water flow rate. In addition, only when the pull head is pulled downward by people until its height is lower than the height threshold, people can judge whether to press the button switch according to their own needs. If pressed, the three-way solenoid valve can be powered on, and the three-way solenoid valve can then switch the water flow from the first flow path to the second flow path, so that the bubble water mode is switched to the shower mode. At this time, since the height of the pull head is lower than the height threshold, even if the water becomes shower water, the sink can block the splashed water and prevent the water from splashing everywhere. Then, if people have requirements for the water flow rate, they can manually push the movable end of the linear potentiometer, that is, push the linear button, to control the water flow rate and water flow speed of the three-way solenoid valve, so that the water flow in the shower mode can be sprayed on the object for cleaning. Then, when the pull head is detachably connected to the faucet pipe again, it means that the height of the pull head is greater than the height threshold at this time, and the water flow of the pull head will automatically decrease to the minimum water flow rate and speed, and then the water flow is switched from the shower mode back to the bubble mode to avoid water splashing when using it next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 is a schematic structural diagram of the present invention;

[0035] Figure 2 is Figure 1 an enlarged view of part A in

[0036] Figure 3 is a structural block diagram of the distance control circuit in the present invention;

[0037] Figure 4 is a wiring diagram of the distance control circuit in the present invention;

[0038] Figure 5 is a schematic structural diagram of the three-way solenoid valve in the present invention;

[0039] Figure 6 is a cross-sectional view of the three-way solenoid valve in the present invention;

[0040] Figure 7 is Figure 6 an enlarged view of part B in

[0041] Figure 8 is Figure 6 an enlarged view of part C in

[0042] Figure 9 is Figure 6 an enlarged view of part D in

[0043] 1. Faucet pipe; 2. Pull-out head; 3. Button switch; 4. Slide potentiometer; 5. Distance detection circuit; 6. Self-cutoff circuit; 7. First relay; 8. Three-way solenoid valve; 9. Delay circuit; 10. Second relay; 11. Recycling electromagnet; 12. Voltage sensor; 13. Signal conditioning circuit; 14. Microcontroller; 15. Electric actuator; 16. Sleeve; 17. Inflow part; 18. Insertion part; 19. Outflow part; 20. First flow channel; 21. Second flow channel; 22. Support pipe; 23. Connecting pipe; 24. Cover; 25. Inflow channel; 26. Valve stem; 27. V-shaped sphere; 28. Vertical rod; 29. Limiting plate; 30. Partition board; 31. Adjusting electromagnet; 32. Metal spring; 33. Support pillar; 34. Sealing plate. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0046] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0048] In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] A pull-out low-flow regulating faucet, as Figure 1 shown, includes a faucet pipe 1 and a pull-out head 2 that is communicated with the faucet pipe 1 through a pull-out hose. The pull-out head 2 can be detachably connected to the faucet pipe 1. The pull-out head 2 has a switchable aerated water mode and a shower mode, and a distance control circuit is provided on the pull-out head 2. The distance control circuit controls the mode of the pull-out head 2 according to whether the height of the pull-out head 2 is lower than a height threshold. When the height of the pull-out head 2 is greater than the height threshold, the pull-out head 2 only maintains the aerated water state. When the height of the pull-out head 2 is lower than the height threshold, the pull-out head 2 can switch between the aerated water mode and the shower mode. The water flow rate of the pull-out head 2 in the shower mode can be adjusted. When the height of the pull-out head 2 changes from being lower than the height threshold to being greater than the height threshold, the pull-out head 2 resumes to the lowest water flow rate and switches back to the aerated water mode.

[0051] In an application example of the present invention, the pull-out faucet is designed with a bubble water mode to ensure a moderate water flow speed during water discharge, effectively preventing water splashing caused by too fast water flow. According to the needs, the user can switch the water flow from the bubble water mode to the shower mode by pulling down the faucet to a certain height. At this time, even if the water flow becomes shower-shaped, the design of the sink can block the splashing water. If the user needs to adjust the water flow speed, the user can manually operate to control the flow rate and flow speed for cleaning items. When the pull-out head 2 returns to its position and the height exceeds the set threshold, the water flow intensity is automatically reduced to the lowest level, and the mode is switched back from the shower mode to the bubble water mode to ensure that water splashing does not occur during the next use.

[0052] Preferably, as Figure 2 shown, the pull-out head 2 includes a housing, a three-way solenoid valve 8 disposed inside the housing, and a bubble water outlet head and a shower water outlet head communicated with the three-way solenoid valve 8. A button switch 3 and a sliding button are disposed on the housing. The three-way solenoid valve 8 is coupled to a distance control circuit through the button switch 3 and the sliding button. The button switch 3 is used to switch between the bubble water mode and the shower mode, and the sliding button is used to adjust the water flow rate of the pull-out head 2 in the shower mode.

[0053] By providing the button switch 3, when the three-way solenoid valve 8 needs to switch the water outflow to switch between the bubble water mode and the shower mode, the switching can be achieved by pressing down the button switch 3. When the pull-out head 2 is in the shower mode, the water flow rate in the shower mode can be adjusted by the sliding button. And since the sliding button does not have a fixed number of gears, when the water flow is adjusted by it, the water flow rate / flow speed can better meet the needs of the user.

[0054] Preferably, as Figures 5 to 9As shown, the three-way solenoid valve 8 includes a sleeve 16, an inflow part 17 and an outflow part 19 fixedly connected to both ends inside the sleeve 16. One end of the inflow part 17 far from the sleeve 16 is communicated with an insertion pipe part 18. An inflow channel 25 is arranged inside the inflow part 17. Inside the outflow part 19, a first flow channel 20 and a second flow channel 21 respectively communicated with a bubble water outlet head and a shower water outlet head are arranged. A V-shaped sphere 27 for adjusting the water flow rate passing through the three-way solenoid valve 8 is rotatably arranged inside the inflow channel 25. An electric actuator 15 fixedly connected to the outer circle of the sleeve 16 and coupled to a distance control circuit through a direct sliding button is provided. A valve stem 26 penetrating into the inflow channel 25 is fixedly connected to the drive shaft of the electric actuator 15. A support pipe 22 is fixedly connected to the outer circle of the sleeve 16. One end of the support pipe 22 far from the sleeve 16 is detachably connected to a connecting pipe 23. A partition plate 30 is fixedly connected inside the connecting pipe 23. An adjusting electromagnet 31 located inside the connecting pipe 23 and coupled to the distance control circuit through a push button switch 3 is fixedly connected to the partition plate 30. One end of the connecting pipe 23 far from the support pipe 22 is detachably connected to a cover 24. A limiting plate 29 is slidably connected inside the support pipe 22. A metal spring 32 is fixedly connected between the limiting plate 29 and the partition plate 30. A vertical rod 28 penetrating into the sleeve 16 is fixedly connected to one side of the limiting plate 29 far from the partition plate 30. A plurality of support columns 33 are fixedly connected to one end of the vertical rod 28 far from the limiting plate 29. A sealing plate 34 is fixedly connected by the plurality of support columns 33. The sealing plate 34 is arranged in a manner that fits the end face of the outflow part 19, and the sealing plate 34 only shields the inlet of the first flow channel 20 or the second flow channel 21 once.

[0055] When the three-way solenoid valve 8 needs to be used, the insertion part 18 can be connected to the draw hose, and tap water is introduced through the inflow channel 25 in the inflow part 17. If it is necessary to adjust the flow rate or flow volume of the tap water in the three-way solenoid valve 8, then the electric actuator 15 is used to drive the valve stem 26, and the valve stem 26 drives the V-shaped sphere 27 to rotate in the inflow channel 25. Due to the V-shaped opening provided on the V-shaped sphere 27, when the tap water passes through the V-shaped sphere 27, the flow rate / flow volume of the tap water can be controlled, and it shows a certain regular increase. Then, if it is necessary to switch between the first flow channel 20 and the second flow channel 21, then the adjustment electromagnet 31 is energized. The adjustment electromagnet 31 generates a magnetic force and adsorbs the metal spring 32. Therefore, the metal spring 32 can pull the limit plate 29 to slide in the support tube 22. When the limit plate 29 moves upward in the support tube 22, the limit plate 29 will pull the vertical rod 28 to move, and the vertical rod 28 will drive a number of support columns 33, and then drive the sealing plate 34 to move, so that the sealing plate 34 switches from the state of closing the second flow channel 21 to the state of closing the first flow channel 20. On the contrary, when the adjustment electromagnet 31 is de-energized, it loses its magnetic force itself, so that the metal spring 32 no longer collapses. The metal spring 32 can expand and push the limit plate 29. Under a series of transmissions, the sealing plate 34 can re-close the second flow channel 21.

[0056] Preferably, an external thread is provided on the outer circumference of the insertion part 18. The inflow part 17 and the outflow part 19 are both threadedly connected to the inner sides of the two ends of the sleeve 16. The support tube 22 and the connecting tube 23 are also threadedly connected. An internal thread is provided on the inner circumference of the end of the connecting tube 23 away from the support tube 22. The connecting tube 23 is threadedly connected to the cover 24 through the internal thread. The top surface and the back surface of the sealing plate 34 are set as planes, and the width of the sealing plate 34 is gradually increased starting from the side facing the inflow part 17.

[0057] The connection relationship between each structure is a detachable connection, and the more specific connection relationship is through threads. The detachable connection by means of threaded connection can not only make the structure more easily processed and formed, but also make the connection between structures have a certain degree of waterproofness. For the structure setting of the sealing plate 34, its two planes are respectively for connecting the support columns 33 and fitting the end face of the outflow part 19 to shield the first flow channel 20 or the second flow channel 21. The width of the sealing plate 34 is gradually increased starting from the side facing the inflow part 17, which is to ensure that when there is tap water flowing in the sleeve 16, the tap water can impact on the front surface of the sealing plate 34, and then be guided by the front surface of the sealing plate 34, so that finally the sealing plate 34 can fit more firmly on the end face of the outflow part 19, avoiding water leakage in the first flow channel 20 or the second flow channel 21 that is closed.

[0058] Preferably, as Figure 3 and Figure 4 shown, the distance control circuit includes

[0059] a distance detection circuit 5, which is arranged on the draw head 2. The distance detection circuit 5 detects the height of the draw head 2 and outputs a distance judgment signal after the height is lower than the height threshold;

[0060] a self-breaking circuit 6. The controlled end of the self-breaking circuit 6 is coupled to the output end of the distance detection circuit 5. The self-breaking circuit 6 controls the energization of its output end in response to the distance judgment signal;

[0061] a first relay 7. The switch of the first relay 7 connects the push-button switch 3 and the adjustment electromagnet 31 to the power supply. The controlled end of the first relay 7 is coupled to the self-breaking circuit 6. After the switch of the first relay 7 is controlled by the self-breaking circuit 6, the circuit where the adjustment electromagnet 31 is located is energized.

[0062] Among them, the distance detection circuit 5 includes a distance sensor and a voltage comparator coupled to the output end of the distance sensor. The self-breaking circuit 6 includes a first triode switch. The base of the first triode switch is coupled to the output end of the voltage comparator. The collector of the first triode switch is powered, and the emitter of the first triode switch is connected to the first relay 7 and then grounded.

[0063] After the distance sensor detects the height of the draw head 2, it can generate a height signal and transmit it to the voltage comparator. The voltage comparator will detect the height signal at this time. If the feedback height is greater than the height threshold, no distance judgment signal is output. If the height of the draw head 2 is less than the height threshold at this time, a distance judgment signal can be output through the voltage comparator. After this distance judgment signal is given to the base of the first triode switch serving as the self-breaking circuit 6, the collector and emitter of the first triode switch are turned on and energized, so that the controlled ends of the first relay 7 and the third relay are both energized. At this time, after the controlled end of the first relay 7 is energized, it controls the opening of the first relay 7 to close. Then, as long as people press the push-button switch 3, the circuit where the adjustment electromagnet 31 is located can be energized, and then the bubble water mode can be switched to the shower mode.

[0064] Preferably, the slide button is a slide potentiometer 4. The slide potentiometer 4 is connected to the power supply through the push-button switch 3. As Figure 3 and Figure 4 shown, the distance control circuit further includes

[0065] a voltage sensor 12. The voltage sensor 12 detects the voltage of the circuit where the slide potentiometer 4 is located and outputs a voltage signal;

[0066] A signal conditioning circuit 13, the input end of the signal conditioning circuit 13 is coupled to the output end of the voltage sensor 12, and the signal conditioning circuit 13 receives the voltage signal for secondary operational amplification and outputs a voltage amplified signal;

[0067] A microcontroller 14, the output end of the signal conditioning circuit 13 is coupled to the input end of the microcontroller 14, and the output end of the microcontroller 14 is coupled to the input end of the electric actuator 15. The microcontroller 14 controls the rotation angle of the drive shaft of the electric actuator 15 in response to the voltage amplified signal.

[0068] Wherein, the signal conditioning circuit 13 includes a first operational amplifier and a second operational amplifier. The input end of the second operational amplifier is coupled to the output end of the first operational amplifier, and the input end of the first operational amplifier is coupled to the output end of the voltage sensor 12.

[0069] After the draw head 2 is switched from the sparkling water mode to the shower mode, the slide button can also be powered on. Since its essence is a slide potentiometer 4, when people use it, by pushing the slide button, that is, the movable end of the slide potentiometer 4, the resistance value of the slide potentiometer 4 can be adjusted. In this way, its voltage will also change accordingly. At this time, the voltage sensor 12 can detect its voltage and output a voltage signal to the signal conditioning circuit 13. The voltage amplified signal obtained after the secondary amplification of the signal conditioning circuit 13 can be used by the microcontroller 14 to control the electric actuator 15 according to the signal. Specifically, the electric actuator 15 is essentially a servo motor, and the microcontroller 14 is coupled to it to control the rotation angle of its drive shaft according to the voltage amplified signal, so as to make the rotation angle of the V-shaped sphere 27 in the inflow channel 25, thereby completing the adjustment action of the flow rate / flow velocity of the tap water.

[0070] Preferably, as Figure 3 and Figure 4 shown, the distance control circuit further includes

[0071] A recovery electromagnet 11, the recovery electromagnet 11 is arranged in the draw head 2, the movable end of the slide potentiometer 4 is made of metal, and the recovery electromagnet 11 is energized to adsorb the movable end of the slide potentiometer 4;

[0072] A delay circuit 9, the input end of the delay circuit 9 is electrically connected, and the delay circuit 9 outputs a delay signal after charging is completed;

[0073] A second relay 10, the controlled end of the second relay 10 is coupled to the output end of the delay circuit 9, and the switch of the second relay 10 is connected between the power supply and the recovery electromagnet 11;

[0074] The third relay, the controlled end of the third relay is connected in series with the loop where the controlled end of the first relay 7 is located. The switch of the third relay is connected between the power supply and the input end of the delay circuit 9. The switch of the third relay is a normally closed switch. When the controlled end of the third relay is powered on, the switch of the third relay disconnects.

[0075] Among them, the delay circuit 9 includes an RC delay circuit and a second triode switch. The base of the second triode switch is coupled to the output end of the RC delay circuit. The collector of the second triode switch is connected to the controlled end of the second relay 10 and then connected to the power supply. The emitter of the second triode switch is grounded.

[0076] After the height of the drawhead 2 is lower than the height threshold, not only can the self-breaking circuit 6 be turned on to power on the controlled end of the first relay 7, but also the controlled end of the third relay can be powered on. At this time, the controlled end of the third relay controls the switch of the third relay to disconnect. At this time, the delay circuit 9 remains in a state where it cannot be charged. When the height of the drawhead 2 switches back to be greater than the height threshold, then the controlled end of the third relay is powered off, instead causing the switch of the third relay to close, and then enabling the delay circuit 9 to be charged. After the charging is completed, a delay signal is sent to the base of the second triode switch, causing the collector and emitter of the second triode switch to conduct, and then causing the controlled end of the second relay 10 to be powered on, causing the switch of the second relay 10 to close, so that the recovery electromagnet 11 can be powered on, so that the magnetic force generated by the recovery electromagnet 11 can suck the metal moving end of the slide potentiometer 4 back to its original position, so that the flow rate / flow of the water can also be restored.

[0077] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pull-out low-flow regulating faucet, characterized in that, It includes a faucet pipe (1) and a pull-out head (2) connected to the faucet pipe (1) through a pull-out hose. The pull-out head (2) is detachably connected to the faucet pipe (1). The pull-out head (2) has a switchable bubble water mode and a shower mode, and a distance control circuit is provided on the pull-out head (2). The distance control circuit controls the mode of the pull-out head (2) according to whether the height of the pull-out head (2) is lower than a height threshold. When the height of the pull-out head (2) is greater than the height threshold, the pull-out head (2) only maintains the bubble water state. When the height of the pull-out head (2) is lower than the height threshold, the pull-out head (2) can switch between the bubble water mode and the shower mode. The water flow rate of the pull-out head (2) in the shower mode can be adjusted. When the height of the pull-out head (2) changes from being lower than the height threshold to being greater than the height threshold, the pull-out head (2) returns to the lowest water flow rate and switches back to the bubble water mode.

2. The pull-out low-flow regulating faucet according to claim 1, characterized in that, The pull-out head (2) includes a housing, a three-way solenoid valve (8) arranged inside the housing, and a bubble water outlet head and a shower water outlet head communicated with the three-way solenoid valve (8). A button switch (3) and a sliding button are arranged on the housing. The three-way solenoid valve (8) is coupled to the distance control circuit through the button switch (3) and the sliding button. The button switch (3) is used to switch between the bubble water mode and the shower mode, and the sliding button is used to adjust the water flow rate of the pull-out head (2) in the shower mode.

3. The pull-out low-flow regulating faucet according to claim 2, wherein The three-way solenoid valve (8) includes a sleeve (16), an inflow part (17) and an outflow part (19) fixedly connected to both ends inside the sleeve (16). One end of the inflow part (17) far from the sleeve (16) is communicated with an insertion pipe part (18). An inflow channel (25) is arranged inside the inflow part (17). Inside the outflow part (19), a first flow channel (20) and a second flow channel (21) respectively communicated with a bubble water outlet head and a shower water outlet head are arranged. Inside the inflow channel (25), a V-shaped sphere (27) for adjusting the water flow rate passing through the three-way solenoid valve (8) is rotatably arranged. A driving shaft of the electric actuator (15) fixedly connected to the outer circle of the sleeve (16) and coupled to a distance control circuit through a straight slide button penetrates into the inflow channel (25) and is fixedly connected to a valve rod (26). A support pipe (22) is fixedly connected to the outer circle of the sleeve (16). One end of the support pipe (22) far from the sleeve (16) is detachably connected to a connecting pipe (23). A partition plate (30) is fixedly connected inside the connecting pipe (23). An adjusting electromagnet (31) located inside the connecting pipe (23) and coupled to the distance control circuit through a push button switch (3) is fixedly connected to the partition plate (30). One end of the connecting pipe (23) far from the support pipe (22) is detachably connected to a cover (24). A limiting plate (29) is slidably connected inside the support pipe (22). A metal spring (32) is fixedly connected between the limiting plate (29) and the partition plate (30). One side of the limiting plate (29) far from the partition plate (30) is fixedly connected to a vertical rod (28) penetrating into the sleeve (16). One end of the vertical rod (28) far from the limiting plate (29) is fixedly connected to a plurality of support columns (33). The plurality of support columns (33) are jointly fixedly connected to a sealing plate (34). The sealing plate (34) is arranged in a manner of fitting the end face of the outflow part (19), and the sealing plate (34) only shields the inlet of the first flow channel (20) or the second flow channel (21) once.

4. The pull-out low-flow regulating faucet according to claim 3, wherein External threads are provided on the outer circle of the insertion pipe part (18). The inflow part (17) and the outflow part (19) are both threadedly connected to the inner sides of both ends of the sleeve (16). The support pipe (22) and the connecting pipe (23) are also threadedly connected. Internal threads are provided on the inner circle of one end of the connecting pipe (23) far from the support pipe (22). The connecting pipe (23) is threadedly connected to the cover (24) through the internal threads. The top surface and the bottom surface of the sealing plate (34) are set to be flat, and the width of the sealing plate (34) is gradually increased starting from the side facing the inflow part (17).

5. The pull-out low-flow regulating faucet according to claim 3, characterized in that, The distance control circuit includes a distance detection circuit (5) which is arranged on the pull head (2). The distance detection circuit (5) detects the height of the pull head (2) and outputs a distance judgment signal after the height is lower than the height threshold; a self-breaking circuit (6). The controlled end of the self-breaking circuit (6) is coupled to the output end of the distance detection circuit (5). The self-breaking circuit (6) controls the energization of its output end in response to the distance judgment signal; The first relay (7), the switch of the first relay (7) is connected to the push-button switch (3) and the adjusting electromagnet (31) to the power supply. The controlled end of the first relay (7) is coupled to the self-breaking circuit (6). After the switch of the first relay (7) is controlled by the self-breaking circuit (6), the circuit where the adjusting electromagnet (31) is located is energized.

6. The pull-out low-flow regulating faucet according to claim 5, wherein The distance detection circuit (5) includes a distance sensor and a voltage comparator coupled to the output end of the distance sensor. The self-breaking circuit (6) includes a first triode switch. The base of the first triode switch is coupled to the output end of the voltage comparator. The collector of the first triode switch is powered on. The emitter of the first triode switch is connected to the first relay (7) and then grounded.

7. The pull-out low-flow regulating faucet according to claim 5, characterized in that, The slide button is a slide potentiometer (4). The slide potentiometer (4) is connected to the power supply through the push-button switch (3). The distance control circuit further includes a voltage sensor (12). The voltage sensor (12) detects the voltage of the circuit where the slide potentiometer (4) is located and outputs a voltage signal. a signal conditioning circuit (13). The input end of the signal conditioning circuit (13) is coupled to the output end of the voltage sensor (12). The signal conditioning circuit (13) receives the voltage signal for secondary operational amplification and outputs a voltage amplified signal. a microcontroller (14). The output end of the signal conditioning circuit (13) is coupled to the input end of the microcontroller (14). The output end of the microcontroller (14) is coupled to the input end of the electric actuator (15). The microcontroller (14) controls the rotation angle of the drive shaft of the electric actuator (15) in response to the voltage amplified signal.

8. The pull-out low-flow regulating faucet according to claim 7, wherein, The signal conditioning circuit (13) includes a first operational amplifier and a second operational amplifier. The input end of the second operational amplifier is coupled to the output end of the first operational amplifier. The input end of the first operational amplifier is coupled to the output end of the voltage sensor (12).

9. The pull-out low-flow regulating faucet according to claim 7, characterized in that, The distance control circuit further includes a recovery electromagnet (11). The recovery electromagnet (11) is arranged in the drawhead (2). The movable end of the slide potentiometer (4) is made of metal. The recovery electromagnet (11) is energized to adsorb the movable end of the slide potentiometer (4). a delay circuit (9). The input end of the delay circuit (9) is powered on. After the charging of the delay circuit (9) is completed, a delay signal is output. a second relay (10). The controlled end of the second relay (10) is coupled to the output end of the delay circuit (9). The switch of the second relay (10) is connected between the power supply and the recovery electromagnet (11). a third relay. The controlled end of the third relay is connected in series with the circuit where the controlled end of the first relay (7) is located. The switch of the third relay is connected between the power supply and the input end of the delay circuit (9).

10. The pull-out low-flow regulating faucet according to claim 9, characterized in that, The delay circuit (9) includes an RC delay circuit and a second triode switch. The base of the second triode switch is coupled to the output terminal of the RC delay circuit. The collector of the second triode switch is connected to the controlled terminal of the second relay (10) and then connected to a power supply, and the emitter of the second triode switch is grounded.

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