A waterway system, instant water heating type drinking water device and control method thereof

Abstract

The present application relates to the technical field of drinking water, and discloses a water system, which comprises a base, a water tank detachably connected to the base, a water outlet waterway connected to the base, and a water pump, a heating device and a water outlet nozzle connected in series along the liquid flow direction of the water outlet waterway; the input end of the water pump is connected to the water tank, and water in the water tank can flow through the heating device to the water outlet nozzle for external use under the negative pressure of the water pump; a water inlet pipeline has one end connected to the output end of the water pump and the other end connected to the input end of the heating device, and a detection device for monitoring whether the water inlet pipeline is water-connected is arranged on the flow path of the water inlet pipeline; and the heating device is started or stopped according to the detection result. The present application controls the start and stop of the heating device by detecting whether the water inlet pipeline is water-connected through the rear detection device, which is beneficial to simplifying the overall structure of the drinking water machine, reducing the production cost and maintenance difficulty, making the cleaning and maintenance of the water tank more convenient, and facilitating the further improvement of the volume and water storage capacity of the water tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drinking water, in particular to a waterway system, an instant heating type drinking water equipment and a control method thereof. BACKGROUND

[0002] The water tank of the existing instant heating type portable drinking water machine is usually detachable and cannot be automatically replenished with water, and often is in a waterless state. In order to prevent the occurrence of the situation that the faucet of the drinking water machine is opened in the case of no water in the water tank, resulting in continuous dry burning of the heating device, the industry usually installs a liquid level detection device (such as a dry reed tube switch or a capacitive liquid level sensor) on the water tank of the instant heating type portable drinking water machine. The liquid level detection device judges whether there is water in the water tank to avoid dry burning of the heating device.

[0003] However, the technical scheme of the instant heating type portable drinking water machine setting a liquid level detection device on the water tank for liquid level detection to prevent dry burning has the following technical problems in actual application: ① When a dry reed tube switch is used as the liquid level detection device, a float needs to be set in the water tank, which has a high requirement for installation space, and the float set inside the water tank is not conducive to the cleaning of the water tank. In addition, the float is easily formed with a water film after being soaked in water for a long time. The adhesion of the water film will cause the float to not follow the change of the liquid level in the water tank after the liquid level changes, thereby causing detection deviation or even causing the detection function to fail, and there is a risk of dry burning; ② When a capacitive liquid level sensor is used as the liquid level detection device, although it solves some problems existing in the dry reed tube switch, whether it is a dry reed tube switch or a capacitive liquid level sensor, the liquid level detection device needs to be integrally connected to the water tank, which means that when the water tank is detached, the liquid level detection device also needs to be detached synchronously, which increases the complexity of the structure and needs to use a detachable on-off electric connection design, thereby increasing the risk of damage and production cost. SUMMARY

[0004] The present application aims to provide a waterway system, an instant heating type drinking water equipment and a control method thereof to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the following technical solutions are provided:

[0006] In a first aspect, the present application provides a water system, comprising: a base, a water tank detachably connected to the base; a water outlet pipeline connected to the base, and the water outlet pipeline is sequentially connected in series with a water pump, a heating device and a water outlet nozzle along a liquid flow direction; an input end of the water pump is connected to the water tank, and water in the water tank can flow through the heating device to the water outlet nozzle under the negative pressure of the water pump for external use; a water inlet pipeline, one end of which is connected to an output end of the water pump, and the other end of which is connected to an input end of the heating device, a detection device is arranged on a flow path of the water inlet pipeline for monitoring whether the water inlet pipeline is water connected; and the heating device is started or stopped according to a detection result of the detection device.

[0007] As an optional solution of the water system provided by the present application, the detection device is a pipeline liquid level sensor, which comprises a water connection pipeline connected in series with the water inlet pipeline and a photoelectric sensor connected to the water connection pipeline.

[0008] As an optional solution of the water system provided by the present application, the water system further comprises a bubble removal assembly arranged upstream of a flow path of the heating device for water flow to pass through and break bubbles in the water flow.

[0009] As an optional solution of the water system provided by the present application, the bubble removal assembly comprises a bubble breaking channel connected in series with the water outlet pipeline and located upstream of the heating device, and a bubble separator comprising a main plate body positioned in the bubble breaking channel, and a bubble breaking hole for liquid flow is arranged on the main plate body.

[0010] As an optional solution of the water system provided by the present application, the main plate body is made of piezoelectric ceramic, and the bubble separator further comprises a power module connected to the main plate body.

[0011] As an optional solution of the water system provided by the present application, the bubble removal assembly further comprises a bubble breaking pipe positioned in the bubble breaking channel and located downstream of the bubble separator, and the bubble breaking pipe extends spirally along the fluid flow direction.

[0012] As an optional solution of the water system provided by the present application, a positioning rod is arranged in the bubble breaking channel, one end of the bubble breaking pipe is connected to the positioning rod, the bubble breaking pipe has elasticity, and an axis of the bubble breaking pipe spirally extending deviates from an axis of the bubble breaking channel.

[0013] As an optional solution of the water system provided by the present application, the water inlet pipeline is formed with a longitudinally extending air exhaust pipe section, and the air pipe longitudinally extends and is connected in series with the air exhaust pipe section.

[0014] As an optional solution of the water system provided by the present application, a signal output end of the pipeline liquid level sensor is connected with a filter circuit.

[0015] In a second aspect, the present application also provides a water heating device, comprising a controller and a water system as described above.

[0016] In a second aspect, the present application also provides a water heating device control method, applied to the water heating device as described above, comprising at least the following steps: normal power on, triggering the hot water switch on the base, and the control board receiving the hot water instruction; the control board controlling the water pump to start, and the water pump generating negative pressure to draw water in the water tank to the heating device; the pipeline liquid level sensor detecting the liquid level in the water inlet pipeline to determine whether there is water; if the pipeline liquid level sensor detects that there is no water in the water inlet pipeline, the pipeline liquid level sensor outputs a high voltage signal to the controller, the controller controls the heating device and the water pump to stop, and an alarm is given to prompt water shortage and remind the user to add water to the water tank; if the pipeline liquid level sensor detects that there is water in the water inlet pipeline, the pipeline liquid level sensor outputs a low voltage signal to the controller, the controller controls the heating device to start, the water in the water tank is heated by the heating device and then flows out through the water outlet nozzle, and after a preset time, the water pump and the heating device stop working.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The technical solution of "providing a detection device on the water tank to control the heating device by detecting the liquid level in the water tank" is abandoned, the detection device is placed between the water pump and the heating device, the start and stop of the heating device are controlled by detecting whether the water inlet pipeline is watered, which is beneficial to simplify the overall structure of the water dispenser, reduce production cost and maintenance difficulty, make the cleaning and maintenance of the water tank more convenient, and help to further improve the volume and water storage capacity of the water tank;

[0019] 2. The detection device uses a pipeline liquid level sensor, which has low cost, small size and a pipeline that can be connected in series with the water inlet pipeline system, and is easy to install and remove;

[0020] 3. A bubble removal assembly is provided upstream of the flow path of the heating device, the bubble removal assembly comprises a bubble divider and a bubble breaking pipe, and adopts a segmented bubble removal design to reduce the amount of water flow bubbles in the water inlet pipeline during the water inlet pipeline transition process, which helps to reduce the interference of bubbles with the photoelectric sensor of the pipeline liquid level sensor, improve the reliability of the pipeline liquid level sensor in detecting whether the heating device is watered, ensure the normal work of the heating device, avoid dry burning or no heating of the heating device, reduce energy consumption, prolong the service life of the heating device, and ensure user experience. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on the contents of the embodiments of the present application and the drawings without any creative effort.

[0022] Figure 1 is a structural diagram of a waterway system provided by an embodiment of the present application Figure 1 ;

[0023] Figure 2 is a structural diagram of a waterway system provided by an embodiment of the present application Figure 2 ;

[0024] Figure 3 is a structural diagram of a bubble divider provided by an embodiment of the present application

[0025] Figure 4 is a structural diagram of a bubble breaking pipe provided by an embodiment of the present application

[0026] In the drawings:

[0027] 1, base; 2, water tank; 3, water pump; 4, heating device; 5, water outlet nozzle; 6, water guide seat; 7, water inlet pipeline; 8, pipeline liquid level sensor; 81, water passage; 82, photoelectric sensor; 9, bubble removing assembly; 91, bubble breaking passage; 92, bubble divider; 921, main plate body; 922, bubble cutting hole; 93, bubble breaking pipe; 94, positioning rod. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or it can be detachable connection; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Embodiment one

[0032] Reference Figures 1-4 A water system, the same as the water system of the existing instant portable water dispenser, both include a base 1 and a water tank 2, the water tank 2 is detachably connected to the base 1. In addition, the base 1 is connected with a water outlet waterway, the water outlet waterway is sequentially connected in series along the liquid flow direction with a water pump 3, a heating device 4 and a water outlet nozzle 5, the base 1 is provided with a water guide seat 6 for detachably connecting the water tank 2, the input end of the water pump 3 is connected to the water guide seat 6 and connected to the inside of the water tank 2 through the water guide seat 6. When working, negative pressure can be generated by starting the water pump 3, the water in the water tank 2 is sequentially passed through the water guide seat 6, the water pump 3 and the heating device 4 under the action of the negative pressure of the water pump 3, and is heated at a high speed by the heating device 4 and then reaches the water outlet nozzle 5 for external use. When the water tank 2 is empty, the water tank 2 can be detached from the base 1 for water replenishment.

[0033] Compared with the water system of the existing instant portable water dispenser, the improvement of the present application is that it further comprises a water inlet pipeline 7 and a detection device, one end of the water inlet pipeline 7 is connected to the output end of the water pump 3, the other end is connected to the input end of the heating device 4, and the detection device is arranged on the flow path of the water inlet pipeline 7 for monitoring whether the water inlet pipeline 7 is watered. When working, the heating device 4 can start or stop heating according to the detection result of the detection device. When the water pump 3 is started, if the detection device detects that water flow passes through the water inlet pipeline 81, the heating device 4 normally heats; if the detection device detects that no water flow passes through the water inlet pipeline 81, the heating device 4 stops heating to avoid dry burning.

[0034] It should be noted that the "upstream" and "downstream" concepts mentioned in the present embodiment are determined according to the direction of liquid flow in the waterway system, and are intended to facilitate the description of the spatial position of the components in the waterway system.

[0035] The present application discards the technical solution of "providing a detection device on the water tank 2 of the original instant portable water dispenser, and controlling the heating device 4 by detecting the liquid level in the water tank 2". Through the above technical solution, the detection device is placed behind, i.e. the water inlet pipeline 7 and the detection device are provided between the heating device 4 and the water pump 3, and the detection device detects whether the water inlet pipeline 7 is watered to control the start and stop of the heating device 4, avoiding the installation of a complex and prone to failure liquid level detection device on the water tank 2. 1. It is beneficial to simplify the overall structure of the water dispenser and reduce production cost and maintenance difficulty, and since the water tank 2 does not need to be additionally provided with a detection device (such as a reed switch or a capacitive liquid level sensor), the cleaning and maintenance of the water tank 2 are more convenient, and the user does not need to worry about damaging the detection device or affecting its normal work during cleaning and water connection; 2. The water tank 2 is not additionally provided with a detection device, so that a certain space can be left in the machine base 1 and / or the water tank 2, which is helpful for further improving the volume and water storage capacity of the water tank 2.

[0036] The implementation of the detection device detecting whether the water inlet pipeline 7 is watered has diversity, for example, the detection device can be a flow sensor or other detection forms, but considering the cost and miniaturization of the water dispenser, in the present embodiment, the structure and connection mode of the detection device are preferably: the detection device is a pipeline liquid level sensor 8, which includes a water passage 81 connected in series with the water inlet pipeline 7 and a photoelectric sensor 82 connected with the water passage 81. In operation, the water passage 81 is connected in series with the water inlet pipeline 7 as part of the sensor, and the photoelectric sensor 82 is connected to the water passage 81, the photoelectric sensor 82 including a light emitting element and a receiving element, when water flows through the water passage 81, it will change the propagation path of light in the water passage 81, so that it is perceived by the receiving element, and outputs a voltage signal consistent with the water level in the water passage 81 through the signal end of the pipeline liquid level sensor 8, and the single-chip microcomputer on the water dispenser receives the voltage signal and starts or stops the heating device 4 according to the voltage signal. Specifically, when there is water in the water passage 81, the pipeline liquid level sensor 8 outputs a low voltage, and when there is no water in the water passage 81, the pipeline liquid level sensor 8 outputs a high voltage.

[0037] Compared with other implementations of the detection device, the pipeline liquid level sensor 8 can be directly installed on the water inlet pipeline 7, which is convenient to install and remove, small in size and low in cost.

[0038] However, in the production test process, the inventors found a problem: in the transition process of the waterway system from water on to water off, due to the change of water flow speed, the roughness of the inner wall of the pipeline, the difference of water quality and the working mode of the water pump 3 and other factors, many bubbles will be generated in the connecting pipeline, which may adhere to the inner wall of the pipeline or enter the water pipe 81 with the water flow, thereby affecting the normal work of the photoelectric sensor 82. Specifically, the bubbles will change the propagation path of the light in the water pipe 81, causing refraction or scattering of the light, resulting in a change in the light signal received by the photoelectric sensor 82. When the number of bubbles is large or the distribution is uneven, the photoelectric sensor 82 will output a noise signal, making the liquid level detection inaccurate. Due to the interference of the bubbles, the pipeline liquid level sensor 8 may output a high voltage in the presence of water, causing the heating device 4 to not work, or output a low voltage in the absence of water, causing the heating device 4 to dry burn.

[0039] To solve the technical problem that the waterway system generates bubbles in the transition process from water on to water off, affecting the detection result of the pipeline liquid level sensor 8, another improvement of the present application is that the waterway system further comprises a bubble removal assembly 9, which is arranged upstream of the flow path of the heating device 4 for water flow to pass through and break the bubbles in the water flow. In operation, the water flow upstream of the flow path of the heating device 4 can flow through the bubble removal assembly 9 to the heating device 4, and the bubbles in the water flow are broken by the bubble removal assembly 9, reducing the amount of bubbles in the water flow through the water pipe 81 in the transition process of the waterway system from water on to water off, which helps to reduce the interference of the bubbles on the photoelectric sensor 82 of the pipeline liquid level sensor 8, improves the reliability of the pipeline liquid level sensor 8 in detecting whether the heating device 4 is supplied with water, ensures the normal work of the heating device 4, avoids dry burning or no heating of the heating device 4, reduces energy consumption, prolongs the service life of the heating device 4, and ensures user experience.

[0040] Specifically, the bubble removal assembly 9 comprises a bubble breaking channel 91 and a bubble splitter 92; the bubble breaking channel 91 is connected in series to the water outlet waterway and is located upstream of the heating device 4, and the bubble splitter 92 comprises a main plate body 921 positioned in the bubble breaking channel 91, and the main plate body 921 is provided with a plurality of bubble breaking holes 922 for liquid flow. In use, the water flow flows through the bubble breaking channel 91 and impacts the main plate body 921 in the bubble breaking channel 91, and flows through the main plate body 921 through the bubble breaking holes 922. In the process of flowing through the main plate body 921, due to the obstruction of the bubble breaking holes 922 and the change of the water flow direction, the bubbles carried in the fluid will be subjected to shearing force and changing pressure, and this dynamic action can split a single large bubble into multiple small bubbles, or even directly break the bubble, thereby reducing the total amount of bubbles and the average bubble volume in the subsequent water flow through the water pipe 81, reducing the interference with the light propagation path of the photoelectric sensor 82 of the pipeline liquid sensor, and making the output signal of the pipeline liquid sensor stable and reliable.

[0041] In this embodiment, the main plate body 921 and the connection mode with the bubble breaking channel 91 have diversity, for example: the main plate body 921 can be integrally formed in the bubble breaking channel 91 by injection molding; or the bubble breaking channel 91 is designed in sections, at least two sections of pipe body, two sections of pipe body are connected through plug-in, thread, clamping and other ways cooperation sealing structure to carry out detachable connection, and the main plate body 921 is positioned and connected at the section connection of the two sections of pipe body of the bubble breaking channel 91 through the clamping groove structure; for example, the inner wall of the bubble breaking channel 91 extends radially to form a positioning groove, and the main plate body 921 can be directly inserted into the positioning groove. In summary, the remaining implementation structures will not be described here.

[0042] Considering that the main plate body 921 of the bubble divider 92 is easy to form a water film on the surface after long-term use, reducing the bubble splitting ability of the bubble splitting hole 922, and the bubble splitting hole 922 of the main plate may be blocked by impurities or scale deposition, affecting the water flow. In this embodiment, the main plate body 921 is preferably made of piezoelectric ceramic, and the bubble divider 92 further includes a power module connected to the main plate body 921. Since piezoelectric ceramic is a material that can convert electrical energy into mechanical energy, when the main plate body 921 is made of piezoelectric ceramic and powered on, the main plate body 921 will generate a small high-frequency vibration, which helps to break the water film that may be formed on the surface of the main plate body 921, maintains the splitting ability of the bubble splitting hole 922, and at the same time, the vibration of the main plate body 921 can realize self-cleaning, avoiding the bubble splitting hole 922 being blocked by impurities and scale, keeping unobstructed, in addition, when the water flow passes through the bubble splitting hole 922, due to the vibration of the main plate body 921, the bubbles flowing through the bubble splitting hole 922 will be subjected to additional shear force and pressure change, which helps to divide large bubbles into smaller bubbles and increase the probability of directly splitting bubbles.

[0043] In addition, in order to further reduce the influence of bubbles on the pipeline liquid level sensor 8, in this embodiment, the bubble removing assembly 9 further includes a bubble breaking pipe 93 positioned in the bubble breaking channel 91 downstream of the bubble divider 92, and the bubble breaking pipe 93 extends spirally along the fluid flow direction. By setting the bubble breaking pipe 93 downstream of the bubble divider 92, the bubble breaking pipe 93 can accept the impact of the water flow and extrude and shear the bubbles in the water flow, further splitting the bubbles or making the bubbles directly dissolve in the water. The design of the bubble breaking pipe 93 extending spirally along the fluid flow direction can increase the contact area and contact time of the water flow and the pipe wall, thereby more effectively breaking the bubbles in the water flow. In addition, the spiral extending bubble breaking pipe 93 can also guide the water flow to spiral flow, optimize the dynamic characteristics of the water flow, change the flow direction and speed of the water flow, reduce the turbulence and vortex in the water flow, and make the water flow more stable.

[0044] It should be noted that the presence of the bubble breaking pipe 93 shares part of the pressure of the upstream bubble divider 92 for dividing and breaking the bubbles of the water flow, so that the total area of the bubble breaking holes 922 of the main plate body 921 can be as large as possible, thereby facilitating the water flow passing property of the main plate body 921 and ensuring the water outlet efficiency of the waterway system.

[0045] Preferably, the bubble breaking pipe 93 is made of elastic material and has a certain elasticity, the bubble breaking channel 91 is provided with a positioning rod 94, one end of the bubble breaking pipe 93 is connected to the positioning rod 94, and the spiral extension axis of the bubble breaking pipe 93 deviates from the axis of the bubble breaking channel 91. Through the above technical solution, the water flow in the bubble breaking channel 91 will be hindered and guided by the spiral extension shape of the bubble breaking pipe 93 to generate spiral flow, and due to the deviation of the axis of the bubble breaking pipe 93 from the axis of the bubble breaking channel 91, the water flow will form eccentric rotational flow at the pipe section of the bubble breaking channel 91 where the bubble breaking pipe 93 is arranged, which will drive the bubble breaking pipe 93 to randomly deflect and disturb, so that the bubble breaking pipe 93 can be radially agitated relative to the bubble breaking channel 91, which is helpful to further break the bubbles and enhance the bubble breaking effect.

[0046] Further, in order to prevent bubbles from being retained in the water passing pipe 81, the water inlet pipe 7 is formed with a longitudinally extending air exhaust pipe section, and the water passing pipe 81 longitudinally extends and is connected in series with the air exhaust pipe section. The air exhaust pipe section and the water passing pipe 81 longitudinally extend, which is conducive to the bubbles rising to the highest position of the water passing pipe 81 along with the water flow, avoiding the retention of small bubbles in the water passing pipe 81 to form large bubbles, which affects the detection of the pipeline liquid level sensor 8.

[0047] In addition to the above technical solutions, in the present embodiment, the signal output end of the pipeline liquid level sensor 8 is also connected with a filter circuit, and by arranging the filter circuit, part of the noise signals output by the pipeline liquid level sensor 8 can be filtered, thereby improving the accuracy and stability of the signals.

[0048] Embodiment Two

[0049] A kind of instant drinking water equipment, it includes the waterway system shown in the above-mentioned embodiment, and also includes controller, the input end of controller is connected pipeline liquid level sensor 8, its output end is connected water pump 3 and heating device 4.

[0050] Embodiment Three

[0051] A control method of drinking water equipment, applied to the instant drinking water equipment described in the above-mentioned embodiment two.

[0052] It includes the following steps:

[0053] The drinking water equipment is normally powered, triggers the hot water switch on the base 1, and the control panel receives the hot water instruction;

[0054] The control panel controls the starting of the water pump 3, and the water pump 3 generates negative pressure to draw the water in the water tank 2 to the heating device 4;

[0055] The pipeline liquid level sensor 8 detects the liquid level in the water inlet pipeline 7 to determine whether there is water;

[0056] If the pipeline liquid level sensor 8 detects that there is no water in the water inlet pipeline 7, the pipeline liquid level sensor 8 outputs a high voltage signal to the controller, the controller controls the heating device 4 and the water pump 3 to stop working, and an alarm is prompted to lack water, reminding the user to add water to the water tank 2;

[0057] If the pipeline liquid level sensor 8 detects that there is water in the water inlet pipeline 7, the pipeline liquid level sensor 8 outputs a low voltage signal to the controller, the controller controls the heating device 4 to start working, the water in the water tank 2 is heated by the heating device 4 and then flows out through the water outlet nozzle 5, and after a preset time, the water pump 3 and the heating device 4 stop working. Note that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A waterway system, characterized in that: include: A base (1) and a water tank (2) detachably connected to the base (1); The water outlet path is connected to the base (1), and the water outlet path includes, in sequence and in series, a water pump (3), a heating device (4) and a water outlet (5) along the fluid flow direction; The input end of the water pump (3) is connected to the water tank (2), and the water in the water tank (2) can flow through the heating device (4) to the water outlet (5) for external use under the negative pressure of the water pump (3); The water inlet pipe has one end connected to the output end of the water pump (3) and the other end connected to the input end of the heating device (4). A detection device is installed on the flow path of the water inlet pipe to detect whether the water inlet pipe is flowing with water. The heating device (4) starts or stops heating according to the detection result of the detection device. The detection device is a pipeline liquid level sensor (8), which includes a water pipe (81) connected in series with the water inlet pipeline and a photoelectric sensor (82) connected to the water pipe (81); It also includes a defoaming component (9), which is located upstream of the flow path of the heating device (4) and is used to supply water flow and break up air bubbles in the water flow; The defoaming component (9) includes a defoaming channel (91) and a bubble divider (92); the defoaming channel (91) is connected in series with the water outlet and is located upstream of the heating device (4); the bubble divider (92) includes a main body (921) positioned in the defoaming channel (91); the main body (921) is provided with a plurality of bubble-cutting holes (922) for liquid flow. The main board body (921) is made of piezoelectric ceramic, and the bubble divider (92) also includes a power module connected to the main board body (921); The defoaming assembly (9) also includes a bubble-breaking tube (93), which is located within the bubble-breaking channel (91) and downstream of the bubble divider (92), and extends spirally along the fluid flow direction. A positioning rod (94) is provided inside the bubble-breaking channel (91). One end of the bubble-breaking tube (93) is connected to the positioning rod (94). The bubble-breaking tube (93) is elastic and the axis of the spiral extension of the bubble-breaking tube (93) is deviated from the axis of the bubble-breaking channel (91).

2. The water system as described in claim 1, characterized in that: The water inlet pipe (7) forms a longitudinally extending exhaust pipe section, and the water inlet pipe (81) extends longitudinally and is connected in series with the exhaust pipe section.

3. The water system as described in claim 1, characterized in that: The signal output terminal of the pipeline liquid level sensor (8) is connected to a filter circuit.

4. An instant hot water dispenser, characterized in that: It includes a controller and a water system as described in any one of claims 1 to 3.

5. A method for controlling a drinking water device, characterized in that: The control method, when applied to the instant hot water dispenser as described in claim 4, includes at least the following steps: When the power is on normally, the hot water switch on the base (1) is triggered, and the control board receives the hot water command; The control panel controls the water pump (3) to start, and the water pump (3) generates negative pressure to draw water from the water tank (2) to the heating device (4); The liquid level sensor (8) detects the liquid level in the inlet pipe (7) to determine whether there is water. If the pipe level sensor (8) detects that there is no water in the inlet pipe (7), the pipe level sensor (8) outputs a high voltage signal to the controller, which controls the heating device (4) and the water pump (3) to stop, and alarms to indicate that there is a lack of water, reminding the user to add water to the water tank (2); If the pipeline level sensor (8) detects water in the inlet pipe (7), the pipeline level sensor (8) outputs a low voltage signal to the controller, which then controls the heating device (4) to start. The water in the water tank (2) is heated by the heating device (4) and flows out through the outlet (5). After a preset time, the water pump (3) and the heating device (4) stop working.

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