Touch faucet

Abstract

The touch faucet provided in the embodiment of the present application includes a faucet body, a solenoid valve, a water inlet pipe, a main control circuit and a battery. Since a first grounding point is arranged on the water inlet pipe, the grounding pin of the main control circuit can be connected to the external earth through the first grounding point when the water inlet pipe is in a water flow state. In other words, the embodiment of the present application sets the external earth as the reference ground of the touch faucet, thereby greatly improving the anti-interference ability of the touch faucet. In this way, when the touch faucet is subjected to external interference, the electrical signal will basically not be changed due to the external interference, so there is no malfunction problem. Therefore, the embodiment of the present application solves the problem of malfunction of the touch faucet due to external interference in the prior art.

Description

Technical Field

[0001] The present application relates to the field of touch control technology, and in particular to a touch-type faucet. Background Art

[0002] At present, some touch faucets are powered by batteries, such as dry batteries, so these touch faucets can work normally when there is no mains power, which enhances the user experience. However, under normal circumstances, since these touch faucets set the negative pole of the battery as the reference ground, that is, the grounding of the touch faucet is floating, it is easy to be affected by external interference and cause malfunctions. For example, when the touch faucet reaches the water outlet condition under external interference, it causes malfunction of water. Among them, external interference includes artificial external interference and natural external interference, etc. Artificial external interference includes human body touching the control box, battery connecting wire or battery box, etc., and natural external interference includes battery connecting wire touching the wall, etc. Summary of the invention

[0003] Based on this, an embodiment of the present application provides a touch-type faucet to solve the problem of malfunction of the touch-type faucet due to external interference.

[0004] A touch faucet provided in an embodiment of the present application includes:

[0005] A faucet body, comprising a water outlet side and a water inlet side, wherein the faucet body has a touch sensing portion on the water outlet side;

[0006] A solenoid valve, one end of which is connected to the water inlet side, and the other end of which is connected to the water inlet pipe, wherein the water inlet pipe is provided with a first grounding point communicating with the inside and outside of the water inlet pipe;

[0007] A main control circuit is powered by a battery, a ground pin of the main control circuit is connected to the first ground point and the negative electrode of the battery, so that when the water inlet pipe is in a water flow state, the ground pin of the main control circuit is connected to the external ground through the first ground point;

[0008] The main control circuit is connected to the touch sensing part, and is used to obtain an electrical signal from the touch sensing part and control the solenoid valve to open or close according to the electrical signal.

[0009] Optionally, the water inlet pipe is further provided with a second grounding point connected to the inside and outside of the water inlet pipe;

[0010] The main control circuit includes a controller and a resistance circuit, the ground pin of the controller is connected to the first ground point, the sampling pin of the controller is connected to the second ground point through the resistance circuit, and the resistance circuit is also connected to the battery;

[0011] The controller is used to detect the resistance value between the first grounding point and the second grounding point when the water inlet pipe is in a water flow state through the resistance circuit, and control the solenoid valve to open or close according to the resistance value and the electrical signal.

[0012] Optionally, the resistance circuit includes a first resistor, the first resistor is connected to the battery, one end of the first resistor is connected to the first ground point, and the other end of the first resistor is connected to the second ground point and a sampling pin of the controller.

[0013] Optionally, the resistance circuit further includes a second resistor connected between the first resistor and the battery.

[0014] Optionally, the resistance circuit further includes a third resistor, and the third resistor is connected between a sampling pin of the controller and the other end of the first resistor.

[0015] Optionally, a region of the water inlet side close to the solenoid valve has a signal collection point, the signal collection point is conductively connected to the touch sensing portion, and the controller is connected to the touch sensing portion through the signal collection point;

[0016] The second grounding point is located between the first grounding point and the signal collection point, and the distance between the first grounding point and the second grounding point is equal to the distance between the second grounding point and the signal collection point.

[0017] Optionally, the water inlet side is connected to the solenoid valve via a metal nut, and the metal nut has the signal collection point.

[0018] Optionally, an anti-interference resistor is connected between the ground pin of the main control circuit and the first ground point.

[0019] Optionally, the touch-type faucet further includes a mechanical switch, and the mechanical switch is arranged between the water outlet side and the water inlet side.

[0020] Optionally, the main control circuit and the solenoid valve are arranged in a control box, and the control box includes a battery accommodating portion.

[0021] The touch faucet provided in the embodiment of the present application includes a faucet body, a solenoid valve, a water inlet pipe, a main control circuit and a battery. Since a first grounding point is arranged on the water inlet pipe, the grounding pin of the main control circuit can be connected to the external earth through the first grounding point when the water inlet pipe is in a water flow state. In other words, the embodiment of the present application sets the external earth as the reference ground of the touch faucet, thereby greatly improving the anti-interference ability of the touch faucet. In this way, when the touch faucet is subjected to external interference, the electrical signal will basically not be changed due to the external interference, so there is no malfunction problem. Therefore, the embodiment of the present application solves the problem of malfunction of the touch faucet due to external interference in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the structure of a touch-type faucet provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram showing that a ground pin of a main control circuit in an embodiment of the present application is connected to an external ground through a first ground point;

[0025] Figure 3 This is another structural schematic diagram of a touch-type faucet in an embodiment of the present application;

[0026] Figure 4 This is another structural schematic diagram of a touch-type faucet in an embodiment of the present application;

[0027] Figure 5 Schematic diagram of a resistor circuit in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] It should be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0030] It should also be understood that the terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims or above-mentioned drawings of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.

[0031] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] The present application embodiment provides a touch-type faucet, such as Figure 1 As shown, it includes: a faucet body 10, a solenoid valve 20, a water inlet pipe 30, a main control circuit 40 and a battery 50.

[0033] The battery 50 may include a dry cell, a lithium battery or a lead-acid battery, etc. The battery 50 is connected to the main control circuit 40 to supply power to the main control circuit 40 to ensure the normal operation of the main control circuit 40. The faucet body 10 has a water outlet side 101 and a water inlet side 102, and has a touch sensing part (not shown in the figure) at the water outlet side 101, and the touch sensing part is used to generate a corresponding electrical signal when the human body touches the outer surface of the water outlet side 101. One end of the solenoid valve 20 is connected to the water inlet side 102, and the other end is connected to the water inlet pipe 30. For example, the solenoid valve 20 can be fixedly connected to the water inlet side 102 or the water inlet pipe 30, detachably connected, or connected through a connecting component (such as a nut). It can be understood that when the solenoid valve 20 is in an open state, tap water flows from the water inlet pipe 30 to the water inlet side 102, and then flows to the water outlet side 101, thereby flowing to the outside for use by users.

[0034] In addition, a first grounding point 301 is provided on the water inlet pipe 30, which is connected to the inside and outside of the water inlet pipe. The first grounding point 301 is connected to the ground pin of the main control circuit 40 and the negative electrode of the battery 50. In this way, when the water inlet pipe 30 is in a water flow state, the ground pin of the main control circuit 40 can be connected to the external ground through the first grounding point 301. Specifically, Figure 2As shown, after the touch faucet is put into use, if the solenoid valve 20 is in a closed state, the tap water pressure will fill the water inlet pipe 30, and if the solenoid valve 20 is in an open state, the tap water will flow from the water inlet pipe 30 to the faucet body 10. Therefore, it can be understood that after the touch faucet is put into use, the water inlet pipe 30 is always in a water-flowing state, and when the water inlet pipe 30 is in a water-flowing state, the first grounding point 301 can form an electrical connection with the external ground through the tap water, thereby connecting the ground pin of the main control circuit 40 to the external ground.

[0035] Based on this, the main control circuit 40 is connected to the touch sensing part (the connection relationship is not shown in the figure) and the solenoid valve 20, and is used to obtain the electrical signal generated by the touch sensing part and control the solenoid valve 20 to open or close according to the electrical signal. Specifically, when the human body touches the touch sensing part, the electrical signal obtained by the main control circuit 40 will change, for example, the signal strength value of the electrical signal will change, so the main control circuit 40 can control the solenoid valve 20 to open or close according to the changing law of the electrical signal.

[0036] In summary, since a first grounding point 301 is provided on the water inlet pipe 30, the grounding pin of the main control circuit 40 can be connected to the external earth through the first grounding point 301 when the water inlet pipe 30 is in a water flow state. In other words, the embodiment of the present application sets the external earth as the reference ground of the touch faucet, thereby greatly improving the anti-interference ability of the touch faucet. In this way, when the touch faucet is subjected to external interference, the electrical signal will basically not change due to the external interference, so there is no problem of misoperation. Therefore, the embodiment of the present application solves the problem of misoperation of the touch faucet due to external interference in the prior art.

[0037] In some embodiments, Figure 3 As shown, an anti-interference resistor R4 can be connected between the ground pin of the main control circuit 40 and the first grounding point 301 to reduce the interference to the main control circuit 40 caused by ground fluctuations. It should be noted that the specific resistance value of the anti-interference resistor R4 can be reasonably set according to actual conditions.

[0038] In some embodiments, the touch faucet may further include a mechanical switch disposed between the water outlet side 101 and the water inlet side 102. It is understandable that under normal circumstances, the mechanical switch is in a normally open state, which does not affect the normal use of the touch faucet. In abnormal circumstances (for example, the solenoid valve is out of control and cannot be closed), the user can manually close the mechanical switch to reduce the waste of water resources.

[0039] In some embodiments, the main control circuit 40 and the solenoid valve 50 can be arranged in a control box, and the control box includes a battery accommodating portion, that is, the main control circuit 40, the solenoid valve 50 and the battery 50 are placed in a box to protect the three.

[0040] In some embodiments, Figure 4 As shown, a second grounding point 302 connecting the inside and outside of the water inlet pipe 30 is also provided on the water inlet pipe 30. The main control circuit 40 includes a controller 401 and a resistance circuit 402. In some embodiments, the second grounding point 302 can be located between the first grounding point 301 and the signal collection point 103.

[0041] Among them, the ground pin of the controller 401 is connected to the first ground point 301, the sampling pin is connected to the second ground point 302 through the resistance circuit 402, the control pin is connected to the solenoid valve 20 (not shown in the figure), and the controller 401 may include a microcontroller unit (MCU), etc.; the resistance circuit 402 is connected to the battery 50, that is, the resistance circuit 402 is connected between the positive and negative electrodes of the battery 50, so that the resistance circuit 402 and the battery 50 form a resistance loop. In addition, the signal acquisition pin of the controller 401 is connected to the touch sensing part. In some embodiments, such as Figure 4 As shown, the area of ​​the water inlet side 102 close to the solenoid valve 20 has a signal collection point 103, and the signal collection point 103 is conductively connected to the touch sensing part. In this way, the signal collection pin of the controller 401 can be connected to the touch sensing part through the signal collection point 103. For example, the water inlet side 102 can be connected to the solenoid valve 20 through a metal nut, and the metal nut can have a signal collection point 103, so the controller 401 can be connected to the touch sensing part through the signal collection point 103 on the metal nut.

[0042] Based on this, the controller 401 is used to detect the resistance value (i.e. Figure 4 Rx1 in the circuit), and controls the solenoid valve 20 to be opened or closed according to Rx1 and the electrical signal.

[0043] Specifically, when the solenoid valve 20 is in an open state, there is an electrical connection between the touch sensing part and the first grounding point 301, and when the solenoid valve 20 is in a closed state, there is no electrical connection between the touch sensing part and the first grounding point 301. Therefore, in these two cases, the electrical signals obtained by the controller 401 through the touch sensing part are different, which makes the control logic of the controller 401 more complicated. Based on this, since the water quality of tap water basically does not change, the resistance value Rx between the signal acquisition point 103 and the first grounding point 301 is basically unchanged when the solenoid valve 20 is in an open state. Therefore, when the solenoid valve 20 is in a closed state, the controller 401 can correct the electrical signal according to factors related to Rx, such as correcting the signal strength of the electrical signal, so that the control logic of the controller 401 can be simplified. More specifically, Rx, Rx1, and the resistance value Rx2 between the signal acquisition point 103 and the second grounding point 302 have the following relationship.

[0044] Rx=Rx1+Rx2

[0045]

[0046] Wherein, L1 is the distance between the first grounding point 301 and the second grounding point 302, and L2 is the distance between the signal acquisition point 103 and the second grounding point 302. It can be seen that Rx1 can be a factor related to Rx. For example, the distance L1 between the first grounding point 301 and the second grounding point 302 can be equal to the distance L2 between the signal acquisition point 103 and the second grounding point 302, so that Rx1 is equal to Rx2, that is, Rx is equal to twice Rx1. Therefore, when the solenoid valve 20 is in a closed state, the controller 401 can correct the electrical signal according to Rx1, for example, correct the signal strength value of the electrical signal according to the size of Rx1. In this way, no matter whether the solenoid valve 20 is in an open state or a closed state, the controller 401 can control the solenoid valve 20 to open or close according to the size relationship between the signal strength value of the electrical signal and the preset threshold value, for example, when the signal strength value of the electrical signal exceeds the preset threshold value, the solenoid valve 20 is controlled to open or close, thereby simplifying the control logic of the controller 401.

[0047] In some embodiments, Figure 5As shown, the resistance circuit 402 includes a first resistor R1, and the first resistor R1 is connected to the battery 50, that is, the first resistor R1 is connected between the positive and negative electrodes of the battery 50, so as to form a resistance loop; in addition, one end of the first resistor R1 is connected to the first grounding point 301, and the other end is connected to the second grounding point 302 and the sampling pin of the controller 401, which can be understood as the first resistor R1 and Rx1 are connected in parallel. Specifically, the inventor found that the actual resistance value of Rx1 is relatively large, so R1 is set in parallel with Rx1 so that the controller 401 can obtain an effective sampling current through the sampling pin, and then determine the actual size of Rx1. More specifically, the controller 401 can obtain the current value of the resistance loop through the sampling pin, and determine the value of Rx1 through the following formula.

[0048]

[0049] Among them, U 总 is the output voltage of the battery, I 总 is the current value obtained by the controller 401 through the sampling pin (i.e., the current value of the resistance loop). It can be understood that due to U 总 ,I 总 and R1 are known, so the controller 401 can calculate Rx1 and correct the electrical signal according to Rx1 when the solenoid valve 20 is in the closed state, for example, correct the signal strength value of the electrical signal according to the size of Rx1 when the solenoid valve 20 is in the closed state. It should be noted that the resistance value of the first resistor R1 can be megohm level, such as 10MΩ.

[0050] In some embodiments, Figure 5 As shown, the resistor circuit 402 further includes a second resistor R2, and the second resistor R2 is connected between the first resistor R1 and the battery 50. Specifically, the sampling current obtained by the controller 401 through the sampling pin shall not be greater than a specified value under normal circumstances, so the second resistor R2 may be provided between the first resistor R1 and the battery 50 to reduce the current value of the resistor loop, thereby reducing the sampling current obtained by the controller 401 through the sampling pin.

[0051] In some embodiments, Figure 5 As shown, the resistor circuit 402 also includes a third resistor R3, which is connected between the sampling pin of the controller 401 and the other end of the first resistor R1. It can be understood that the third resistor R3 can reduce the size of the sampling current obtained by the controller 401 through the sampling pin.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A touch faucet, characterized in that: include: A faucet body, comprising a water outlet side and a water inlet side, wherein the faucet body has a touch sensing portion on the water outlet side; A solenoid valve, one end of which is connected to the water inlet side, and the other end of which is connected to the water inlet pipe, wherein the water inlet pipe is provided with a first grounding point and a second grounding point which are connected to the inside and outside of the water inlet pipe; A main control circuit is powered by a battery, a ground pin of the main control circuit is connected to the first ground point and the negative electrode of the battery, so that when the water inlet pipe is in a water flow state, the ground pin of the main control circuit is connected to the external ground through the first ground point; The main control circuit is connected to the touch sensing part to obtain the electrical signal of the touch sensing part; an anti-interference resistor is connected between the ground pin of the main control circuit and the first ground point; The main control circuit includes a controller and a resistance circuit, the ground pin of the controller is connected to the first ground point, the sampling pin of the controller is connected to the second ground point through the resistance circuit, and the resistance circuit is also connected to the battery; The controller is used to detect the resistance value between the first grounding point and the second grounding point when the water inlet pipe is in a water flow state through the resistance circuit, and control the solenoid valve to open or close according to the resistance value and the electrical signal; The area of ​​the water inlet side close to the solenoid valve has a signal collection point, the signal collection point is conductively connected to the touch sensing part, and the controller is connected to the touch sensing part through the signal collection point; The second grounding point is located between the first grounding point and the signal collection point, and the distance between the first grounding point and the second grounding point is equal to the distance between the second grounding point and the signal collection point.

2. The touch faucet according to claim 1, characterized in that: The resistance circuit includes a first resistor, the first resistor is connected to the battery, one end of the first resistor is connected to the first ground point, and the other end of the first resistor is connected to the second ground point and a sampling pin of the controller.

3. The touch faucet according to claim 2, characterized in that: The resistance circuit further includes a second resistor connected between the first resistor and the battery.

4. The touch faucet according to claim 2, characterized in that: The resistance circuit further includes a third resistor, and the third resistor is connected between the sampling pin of the controller and the other end of the first resistor.

5. The touch faucet according to claim 1, characterized in that: The water inlet side is connected to the solenoid valve via a metal nut, and the metal nut has the signal collection point.

6. The touch faucet according to claim 1, characterized in that: The touch-type faucet further includes a mechanical switch, and the mechanical switch is arranged between the water outlet side and the water inlet side.

7. The touch faucet according to claim 1, characterized in that: The main control circuit and the solenoid valve are arranged in a control box, and the control box includes a battery accommodating portion.

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