Self-cleaning pipeline water dispenser and control method

Abstract

The invention discloses a self-cleaning pipeline water dispenser which comprises a machine body, a water storage tank, a water inlet pipe, a water conveying pipe, a water inlet valve, a water suction pump, an electric heating module, a hot water outlet, a warm water outlet, a water drainage pipe, a water drainage valve, a touch control panel and a main control panel. The multi-part high-pressure spray-washing module is used for performing high-pressure water washing on parts where dirt is easy to accumulate in the pipeline, and then the back-washing module is used for integrally cleaning the pipeline. The invention further discloses a control method of the self-cleaning pipeline water dispenser. The invention belongs to the technical field of pipeline machines, and can effectively clean impurities such as water scale and algae in a pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline machines, and more specifically, it relates to a control method for a self-cleaning pipeline drinking water machine. Background Art

[0002] The pipeline machine is also known as a pipeline drinking water machine or a wall-mounted pipeline drinking water machine. It is divided into wall-mounted pipeline type and vertical pipeline type. Generally, it is used in families, offices, etc. The product is equipped with an LED display light and can heat, keep warm, and refrigerate. After the existing pipeline machine is used for a long time, dirt and some harmful substances such as Escherichia coli will appear in the water storage tank and pipeline. If not cleaned, it will pose a hazard to the health of users; the existing pipeline machine has a cleaning function, and the pipeline is backwashed by changing the flow direction of the water in the pipeline to remove the dirt.

[0003] However, for the pipeline machines used in places such as families and offices, in order to pursue beauty, small space occupation, and easy installation and layout, it is necessary to design the appearance of the pipeline machine as small as possible to obtain a small pipeline machine with a small volume and a compact internal structure layout. The pipelines in the small pipeline machine are bent many times, resulting in dirt being easily accumulated at the bent parts of the pipe segments and being difficult to clean. Moreover, the pipelines used in the small pipeline machine are food-grade silicone hoses. The food-grade silicone hoses have a small diameter and cannot withstand a large water pressure. It is required that the water in the pipeline flows smoothly. The water pressure in the silicone hose is usually controlled below 0.1 MPa to avoid the socket connection between the silicone hose and other components from becoming disengaged and leaking water. Therefore, a large-power water pump cannot be used for water supply; thus, when a small-power micro water pump is used to pump water for backwashing the pipeline, due to the small water pressure in the pipeline and the low water flow rate, the dirt in the pipeline, especially the dirt at the bent parts of the pipe segments, cannot be effectively washed away.

[0004] Therefore, it is necessary to set up a technical solution that can clean the small pipelines of the small pipeline machine to solve the above problems. Summary of the Invention

[0005] Aiming at the above deficiencies, one of the purposes of the present invention is to provide a self-cleaning pipeline drinking water machine to solve the problem that the existing pipeline machine cannot effectively clean the dirt in the bent section of the pipeline due to the small diameter of the pipeline and the gentle flow of the conveyed water.

[0006] The second purpose of the present invention is to provide a control method for a self-cleaning pipeline drinking water machine.

[0007] To achieve the first above-mentioned objective, the present invention provides a self-cleaning pipeline water dispenser, which includes a machine body, a water storage tank, a water inlet pipe, a water delivery pipe, a water inlet valve, a water pump, an electric heating module, a hot water outlet, a warm water outlet, a drain pipe, a drain valve, a touch control panel and a main control board. A multi-part high-pressure spray cleaning module and a backwashing module are provided inside the machine body. The multi-part high-pressure spray cleaning module includes a water outlet tank connected to the water outlet of the top of the electric heating module, an intermediate water tank, a circulating water pump and a common rail pipe. The intermediate water tank is connected to the water outlet tank through an overflow pipe. The input end of the circulating water pump is connected to the intermediate water tank, and the output end is connected to the common rail pipe. A plurality of cleaning branch pipes are provided on the common rail pipe, and needle nozzles are provided at the ends of the plurality of cleaning branch pipes. A plurality of cleaning points connected to the plurality of needle nozzles are provided on the water delivery pipe. A plurality of hydraulic sensors are provided on the water delivery pipe, and the main control board can control the output power of the water pump according to the pressure monitoring data of the hydraulic sensors.

[0008] As a preferred technical solution of the present invention, a backwashing module is provided inside the machine body. The backwashing module includes a first solenoid valve provided on the pipe section where the circulating water pump is connected to the common rail pipe. The output end of the circulating water pump is connected with a backwashing pipe. One end of the backwashing pipe is communicated with the water outlet tank. A second solenoid valve is provided on the backwashing pipe. A reversing valve is provided between the water pump and the water delivery pipe.

[0009] As a preferred technical solution of the present invention, a circulating water module is provided inside the machine body. The circulating water module includes a circulating pipe connected to the output end of the circulating water pump. A cleaning spray head is provided at the top of the water storage tank. The circulating pipe is connected to the input end of the cleaning spray head. A third solenoid valve is provided on the circulating pipe. A cleaning agent dosing device is provided at the top of the water storage tank.

[0010] As a preferred technical solution of the present invention, the cleaning agent dosing device includes a cleaning agent dosing tank provided at the top of the water storage tank. A dosing pipe communicating with the circulating pipe is provided at the bottom of the cleaning agent dosing tank. A one-way valve and a dosing valve are provided on the dosing pipe.

[0011] As a preferred technical solution of the present invention, the output end of the circulating water pump is connected with a secondary heating water supply pipe communicating with the water inlet of the electric heating module. A fourth solenoid valve is provided on the secondary heating water supply pipe; a plurality of cleaning points of the needle nozzles are provided on the backwashing pipe, the circulating pipe and the secondary heating water supply pipe.

[0012] As a preferred technical solution of the present invention, a warm water output pipe is provided on one side of the bottom of the intermediate water tank, an outlet seat is provided on the upper part of the front end of the machine body, the touch control panel is arranged on the front end face of the outlet seat, the hot water outlet and the warm water outlet are arranged at the bottom end of the outlet seat, and the hot water outlet and the warm water outlet are respectively communicated with the hot water output pipe and the warm water output pipe.

[0013] As a preferred technical solution of the present invention, a first liquid level sensing device is arranged in the storage water tank, and a second liquid level sensing device is arranged in the intermediate water tank; the main control board is electrically connected to the electric heating module, the first liquid level sensing device, the second liquid level sensing device, the water inlet valve, the circulating water pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the chemical dosing valve, the drain valve and the touch control panel.

[0014] To achieve the second object, based on the above self-cleaning pipeline drinking machine, the present invention also provides a control method for a self-cleaning pipeline drinking machine, including the following steps:

[0015] S1. The main control board controls the water pump to extract the water in the storage water tank to the electric heating module for heating to boiling according to the water level monitoring data of the second liquid level sensing device in the intermediate water tank. The boiling water after passing through the electric heating module enters the water outlet tank, and then is injected into the intermediate water tank through the overflow pipe for temporary storage;

[0016] S2. When warm water is needed, the warm water valve is controlled to open by pressing the warm water button on the touch control panel, and the warm water in the intermediate water tank can flow out through the warm water output pipe and the warm water outlet;

[0017] S3. When boiling water is needed, the hot water valve is controlled to open and the water pump and the electric heating module are controlled to start by pressing the hot water button on the touch control panel. The boiling water heated by the electric heating module flows out through the water outlet tank, the hot water output pipe and the hot water outlet;

[0018] S4. When the pipeline in the machine body needs to be cleaned, first, the main control board controls the cleaning agent dosing device to add the cleaning agent into the storage water tank, and then the mixed liquid in the pipeline is circulated by the circulating water module;

[0019] Then, the multi-part high-pressure spray washing module is controlled to perform high-pressure water flow washing on multiple washing points in the pipeline;

[0020] Then, the main control board controls the backwashing module to change the water flow direction in the water delivery pipe, and perform high-temperature water reverse washing on the water delivery pipe and the electric heating module, and the waste water is discharged from the drain pipe.

[0021] As a preferred technical solution of the present invention, when hot water at different temperatures is needed, the hot water temperature is adjusted by touching the temperature adjustment button on the control panel, and the hot water valve is controlled to open by pressing the hot water button on the touch control panel. At the same time, the circulation water pump and the electric heating module are started, and the fourth solenoid valve on the secondary heating water supply pipe is controlled to open. After the warm water in the intermediate water tank is pumped to the electric heating module and heated to the set temperature, the hot water flows out through the water outlet trough, the hot water output pipe, and the hot water outlet.

[0022] As a preferred technical solution of the present invention, in the above step S4, when the multi-position high-pressure flushing module flushes multiple flushing points in the pipeline with high-pressure water flow:

[0023] Control the multi-position high-pressure flushing module to sequentially perform high-speed water flow flushing on multiple flushing points on the secondary heating water supply pipe, the backwashing pipe circulation pipe, and the water delivery pipe, and perform separate backwashing on the secondary heating water supply pipe, the backwashing pipe circulation pipe, and the water delivery pipe through the backwashing module.

[0024] Compared with the existing technology, the present invention has the following beneficial effects:

[0025] (1) In the present invention, a multi-position high-pressure flushing module is provided to perform high-speed water flow flushing on the bent sections of each pipe section in the pipeline water dispenser, and then cooperate with the backwashing module to flush the dirt in the pipeline, effectively cleaning the parts in the pipeline where dirt is likely to accumulate, and solving the problem that the existing pipeline machine cannot effectively clean the dirt in the bent sections of the pipeline completely;

[0026] (2) In the present invention, multiple hydraulic sensors are arranged on the pipeline in the pipeline water dispenser to monitor the water pressure in the pipeline in real time and transmit the water pressure data to the main control board. The main control board can control the output power of the water pump and the circulation pump according to the pressure monitoring data, adjust the water pressure in each pipe section, prevent the water pressure in the pipeline from being too high and the water flow rate from being too fast, which may damage the pipeline, and ensure the normal operation of the pipeline in the water dispenser;

[0027] (3) In the present invention, the hot water temperature can be adjusted by touching the temperature adjustment button on the touch control panel, and users can obtain hot water at different temperatures and that is clean and hygienic. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 It is the main structural view of the self-cleaning pipeline water dispenser of the present invention;

[0030] Figure 2 is a side view of the structure of the self-cleaning pipeline drinking fountain of the present invention;

[0031] Figure 3 is a rear view of the structure of the self-cleaning pipeline drinking fountain of the present invention;

[0032] Figure 4 is a three-dimensional view of the rear structure of the self-cleaning pipeline drinking fountain of the present invention;

[0033] Figure 5 is an enlarged cross-sectional view of the structure of the dragon feeder assembly in the present invention;

[0034] Figure 6 is a pipeline layout diagram inside the self-cleaning pipeline drinking fountain of the present invention.

[0035] Description of main reference numerals:

[0036] 1. Body; 2. Water storage tank; 3. Water inlet pipe; 4. Water delivery pipe; 5. Water inlet valve; 6. Water pump; 7. Electric heating module; 8. Hot water outlet; 9. Warm water outlet; 10. Drain pipe; 11. Touch control panel; 12. Main control board; 13. Water outlet trough; 14. Hot water output pipe; 15. Overflow pipe; 16. Intermediate water tank; 17. Warm water output pipe; 18. Circulation water pump; 19. Flushing nozzle; 21. Detergent dosing device; 22. Secondary heating water supply pipe; 23. Fourth solenoid valve; 24. Detergent dosing tank; 25. Dosing pipe; 26. Check valve; 27. Dosing valve; 29. Drain valve; 30. Water outlet seat; 31. Dragon feeder assembly; 32. Water filling pipe; 33. Water filling solenoid valve; 34. Feeding cylinder; 35. Dragon blade; 36. Feeding motor; 37. Hopper; 38. Gear assembly; 41. High-pressure common rail pipe; 42. Flushing branch pipe; 43. Needle nozzle; 44. First solenoid valve; 45. Backwashing pipe; 46. Second solenoid valve; 47. Directional valve; 48. Circulation pipe; 49. Third solenoid valve; 50. Hydraulic sensor; 100. Multi-part high-pressure flushing module. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The embodiments of the present invention will be described below according to the overall structure of the present invention.

[0038] The detailed implementation manners of the present invention are as follows:

[0039] As shown in the attached Figures 1 - 6As shown in the figure, a self-cleaning pipeline water dispenser includes a machine body 1, a water storage tank 2, a water inlet pipe 3, a water delivery pipe 4, a water inlet valve 5, a water pump 6, an electric heating module 7, a hot water outlet 8, a warm water outlet 9, a drain pipe 10, a drain valve 29, a touch control panel 11 and a main control board 12. The electric heating module 7 is composed of a conventional stainless steel heating pipe as a heating element, a temperature sensor and a temperature control circuit on the main control board 12. The water delivery pipe 4 is a food-grade silica gel pipe. In order to adapt to the narrow space inside the household small pipeline water dispenser, the diameter of the food-grade silica gel pipe is 8-12 mm. The joints between the food-grade silica gel pipe and other components inside the pipeline water dispenser are connected by a socket connection method and the food-grade silica gel pipe and the joints are fixed by tying them with nylon ties. The water pump 6 is a micro water pump, and the water supply pressure range is 0.02 MPa - 0.1 MPa;

[0040] A multi-part high-pressure flushing module 100 and a backwashing module are provided inside the machine body 1. The multi-part high-pressure flushing module 100 includes a water outlet tank 13 connected to the water outlet of the top end of the electric heating module 7, an intermediate water tank 16, a circulating water pump 18 and a common rail pipe 41. The water supply pressure range of the circulating water pump 18 is 0.05 MPa - 0.2 MPa. The intermediate water tank 16 is connected to the water outlet tank 13 through an overflow pipe 15. The input end of the circulating water pump 18 is connected to the intermediate water tank 16, and the output end is connected to the common rail pipe 41. A plurality of flushing branch pipes 42 are provided on the common rail pipe 41, and needle nozzles 43 are provided at the ends of the plurality of flushing branch pipes 42. A plurality of flushing points connected to the plurality of needle nozzles 43 are provided on the water delivery pipe 4. The flushing points are arranged at the bending parts of the water delivery pipe 4. A plurality of hydraulic sensors 50 are provided on the water delivery pipe 4. The main control board 12 can control the output power of the water pump 6 according to the pressure monitoring data of the hydraulic sensors 50.

[0041] In the self-cleaning pipeline water dispenser of the present invention, referring to Figures 3 - 5, a multi - part high - pressure spray cleaning module 100 is added inside the pipeline water dispenser to flush the pipelines inside the pipeline water dispenser section by section. In particular, flushing points are set at the bends in pipelines such as the water delivery pipe 4 of the pipeline water dispenser where scale is likely to accumulate. A needle - type nozzle 43 is installed at the flushing point. The needle - type nozzle 43 is a tungsten steel nozzle or a stainless steel nozzle with a diameter of 2 mm, which is inserted into the pipe wall at the flushing point. Clamps and other structures are set at the bends of the pipeline to be fixed inside the machine body 1; the water pump 6 pumps the water in the water storage tank 2 through the water delivery pipe 4 to the electric heating module 7 for heating to obtain boiling water. The boiling water enters the water outlet tank 13 and then enters the intermediate water tank 16 through the overflow pipe 15 for temporary storage. During the self - cleaning operation, the main control board 12 controls the circulation water pump 18 to start, pumps the hot water in the intermediate water tank 16 into the high - pressure common - rail pipe 41, and then the water in the high - pressure common - rail pipe 41 is transported to the needle - type nozzle 43 through each flushing branch pipe 42. Each needle - type nozzle 43 sprays high - speed water flow at each flushing point to flush the scale on the pipe wall at the flushing point so that the scale falls off from the pipe wall; then, the pipeline is flushed through the back - flushing module inside the pipeline water dispenser, and the sewage in the pipeline can be transported to the drain pipe 10. By controlling the drain valve 29 to open through the main control board 12, the sewage can be discharged; the water column sprayed by each needle - type nozzle 43 of the designed multi - part high - pressure spray cleaning module 100 has a fast flow rate and a small diameter, which can scour the dirt accumulated at the bends of the pipeline at the flushing point with high - speed water flow, wash off the scale, and the small water column sprayed by the needle - type nozzle 43 will not exert too much pressure on the overall pipeline such as the water delivery pipe 4. While achieving the technical purpose of flushing the scale off the pipe wall and cleaning the pipeline, it can also avoid large - amplitude swinging or vibration of the delivery pipe 4 during spraying, so that the connection between the water delivery pipe 4 and other components will not become loose and detached, ensuring that the water delivery pipe 4 can be stably and reliably installed inside the pipeline water dispenser.

[0042] Refer to Figures 3 - 5 , in the self - cleaning pipeline water dispenser of the present invention, a plurality of hydraulic sensors 50 are set on the pipelines inside the pipeline water dispenser. The plurality of hydraulic sensors 50 real - time monitor the water pressure inside the pipeline and transmit the water pressure data to the controller of the main control board 12. The main control board 12 can control the output power of the water pump 6 according to the pressure monitoring data of the hydraulic sensors 50, adjust the water pressure inside pipelines such as the water delivery pipe 4, prevent the water pressure inside the pipeline from being too large and the water flow rate from being too fast, which may damage the pipeline, and ensure the normal operation of the pipelines inside the water dispenser.

[0043] In order to better flush the pipeline, the back - flushing module is improved. Refer to Figures 3 - 6, the backwashing module includes a first solenoid valve 44 provided on the pipe section connecting the circulating water pump 18 and the high-pressure common rail pipe 41. The output end of the circulating water pump 18 is connected with a backwash pipe 45. One end of the backwash pipe 45 communicates with the water outlet tank 13. A second solenoid valve 46 and a pressure reducing valve are provided on the backwash pipe 45. The backwash pipe 45 is a food-grade silicone tube. A reversing valve 47 is provided between the water pump 6 and the water delivery pipe 4. The reversing valve 47 is a two-position four-way solenoid valve that can change the direction of the water flow in the water delivery pipe 4. In this embodiment, after the high-pressure spray washing module 100 at multiple positions sprays high-speed water flow on the scale accumulated at each flushing point in the pipeline for a period of time, the scale falls into the pipeline. Then, the circulating water pump 18, the water pump 6 are started, the first solenoid valve 44 is closed, and the second solenoid valve 46 is opened. The hot water in the intermediate water tank 16 is pumped into the backwash pipe 45 and the water outlet tank 13, and then pumped into the water delivery pipe 4 through the water outlet tank 13 to wash the backwash pipe 45, the electric heating module 7 and the water delivery pipe 4, and discharge the scale from the drain pipe 10, so as to wash the backwash pipe 45, the water outlet tank 13, the electric heating module 7 and the water delivery pipe 4 clean and perform high-temperature sterilization to ensure the drinking water hygiene of users; a pressure reducing valve is provided on the backwash pipe 45 to control the water flow pressure in the backwash pipe 45, avoid damage to the backwash pipe 45 caused by excessive water pressure, and ensure the normal operation of the pipeline in the water dispenser.

[0044] For better disinfection and cleaning of the pipeline, a circulating water module is provided in the machine body 1. Refer to Figures 3 - 6 , the circulating water module includes a circulating pipe 48 connected to the output end of the circulating water pump 18. A flushing nozzle 19 is provided at the top of the water storage tank 2. The circulating pipe 48 is connected to the input end of the flushing nozzle 19. A third solenoid valve 49 and a pressure boosting valve are provided on the circulating pipe 48. The circulating pipe 48 is a food-grade silicone tube. A cleaning agent dosing device 21 is provided at the top of the water storage tank 2. In this embodiment, the circulating water pump 18 can pump the water in the intermediate water tank 16 into the water storage tank 2 through the circulating pipe 48 and the flushing nozzle 19; the main control board 12 controls the start of the water pump 6 and the circulating water pump 18 and controls the opening of the third solenoid valve 49. The water pump 6 pumps the water to the electric heating module 7 for heating. Then, the hot water enters the intermediate water tank 16, and the circulating pipe 48 pumps the water from the intermediate water tank 16 into the water storage tank 2, so that the hot water can circulate in the pipeline to perform high-temperature disinfection and flushing on the pipeline and the water storage tank 2; moreover, through the cleaning agent dosing device 21, a food-grade citric acid solution can be injected into the water storage tank 2 to be mixed with the water in the tank, so that the food-grade citric acid solution can flow with the water circulation in the pipeline, soak the dirt on the pipe wall of the pipeline, make the dirt more easily fall off from the pipe wall, and the food-grade citric acid solution can disinfect and sterilize the pipeline to ensure that the pipeline is cleaned clean and ensure the drinking water safety of users.

[0045] Refer to Figures 3 - 5The detergent dosing device 21 includes a detergent dosing box 24 disposed on the top of the water storage tank 2, a dosing pipe 25 connected to the circulation pipe 48 is disposed at the bottom of the detergent dosing box 24, and a check valve 26 and a dosing valve 27 are disposed on the dosing pipe 25. In this embodiment, the dosing valve 27 is an electromagnetic valve electrically connected to the main control board 12, and the main control board 12 can control the dosing valve 27 to be opened or closed. The detergent dosing box 24 is used to mix citric acid detergent particles with water to obtain a detergent solution, and then the main control board 12 controls the electromagnetic dosing valve 27 to open, and the detergent solution is transported to the circulation pipe 48, and then flows into the water storage tank 2, and finally the pipeline is soaked and disinfected.

[0046] In order to realize automatic configuration of cleaning agent, the cleaning agent dosing device 21 is improved. Figure 5 The detergent dosing device 21 also includes a Jiaolong feeding assembly 31 provided on a side wall of the detergent dosing box 24. The Jiaolong feeding assembly 31 includes a feeding barrel 34, a Jiaolong blade 35 provided in the feeding barrel 34, and a feeding motor 36 for driving the Jiaolong blade 35 to rotate. One end of the feeding barrel 34 is open and communicated with the inner cavity of the detergent dosing box 24. The feeding motor 36 drives the Jiaolong blade 35 to rotate through a gear assembly 38. A hopper 37 is provided on the feeding barrel 34. The outlet at the bottom of the hopper 37 is communicated with the opening on the inner wall of the feeding barrel 34. Citric acid particles are contained in the hopper 37. The feeding motor 36 is a stepping motor electrically connected to the main control board 12; a water adding pipe 32 is provided on the other side of the detergent dosing box 24. The water adding pipe 32 is connected to the circulation pipe 48 through a three-way joint. A water adding solenoid valve 33 electrically connected to the main control board 12 is provided on the water adding pipe 32. In this embodiment, a Jiaolong feeding component 31 is provided to quantitatively deliver the detergent particles to the detergent dosing box 24. The main control board 12 controls the running time of the feeding motor 36 of the Jiaolong feeding component 31 to control the rotation time of the Jiaolong blade 35 in the feeding barrel 34, so as to control the amount of detergent particles delivered from the hopper 37 and the feeding barrel 34 to the detergent dosing box 24; the main control board 12 controls the opening time of the water adding solenoid valve 33 to control the amount of water in the circulation pipe 48 injected into the detergent dosing box 24 through the water adding pipe 32, so as to ensure that the water delivered to the detergent dosing box 24 is sufficient to fully dissolve the detergent particles and obtain a food-grade citric acid solution; and realizes automatic configuration of a certain proportion of food-grade citric acid detergent solution, and the proportion of the detergent solution is accurately configured without manual operation.

[0047] Reference Figures 3 - 6, a water outlet tank 13 is provided at the water outlet end of the electric heating module 7. The hot water output pipe 14 is communicated with the bottom of the water outlet tank 13, which can temporarily store the water heated by the electric heating module 7, ensuring that when the user uses it, the hot water output pipe 14 can continuously transport hot water to the hot water outlet 8; the excess hot water in the water outlet tank 13 can overflow into the intermediate water tank 16 through the overflow pipe 15. The function of the intermediate water tank 16 is to store in advance the boiling water heated by the electric heating module 7 and let the boiling water cool down for standby. When the user needs to drink warm water, the warm water in the intermediate water tank 16 can be output from the warm water output pipe 17 at the bottom of the intermediate water tank 16 to the warm water outlet 9, and the user can drink the warm water that has been treated by high-temperature disinfection; it is very friendly to drinkers with poor resistance such as the elderly, children, and pregnant women. They can drink clean and hygienic warm water immediately without waiting, greatly improving the user experience.

[0048] Refer to Figures 3 - 6 , the output end of the circulation pump 18 is connected with a secondary heating water supply pipe 22 communicated with the water inlet of the electric heating module 7. The secondary heating water supply pipe 22 is a food-grade silica gel pipe. A fourth solenoid valve 23 and a pressure reducing valve are provided on the secondary heating water supply pipe 22. The pressure reducing valve is used to adjust the water pressure in the secondary heating water supply pipe 22 to prevent the water pressure from exceeding the bearing pressure of the secondary heating water supply pipe 22. In this embodiment, the secondary heating water supply pipe 22 is set to connect the circulation pump 18 and the electric heating module 7. Its function is to transport the warm water in the intermediate water tank 16 to the electric heating module 7 through the secondary heating water supply pipe 22 and the fourth solenoid valve 23 for secondary heating; when the user needs to use hot water at any temperature, such as when 80 °C hot water is needed, the outlet water temperature of the hot water outlet 8 can be set on the touch control panel 11, and the main control board 12 can automatically control the circulation pump 18 to start and open the fourth solenoid valve 23, draw the warm water in the intermediate water tank 16 into the electric heating module 7 for secondary heating, ensuring that the user can get hot water at different temperatures, which has been treated by high temperature and is clean and hygienic when taking water.

[0049] In this embodiment, a plurality of flushing points for the needle nozzle 43 are provided on the backwashing pipe 45, the circulation pipe 48 and the secondary heating water supply pipe 22. For example, flushing points are set at the bending sections of the backwashing pipe 45, the circulation pipe 48 and the secondary heating water supply pipe 22 for high-speed water flow flushing, washing away the scale accumulated at the pipe bends, ensuring that the backwashing pipe 45, the circulation pipe 48 and the secondary heating water supply pipe 22 can be effectively cleaned, ensuring that the water quality in the water dispenser meets the drinking standard and meeting the user's healthy drinking requirements.

[0050] Refer to Figures 1 - 4, a hot water output pipe 14 is provided at the bottom of the water outlet tank 13, a warm water output pipe 17 is provided at one side of the bottom of the intermediate water tank 16, an outlet seat 30 is provided at the upper part of the front end of the machine body 1, a touch control panel 11 is arranged on the front end face of the outlet seat 30, a hot water outlet 8 and a warm water outlet 9 are arranged at the bottom end of the outlet seat 30, the hot water outlet 8 and the warm water outlet 9 are respectively communicated with the hot water output pipe 14 and the warm water output pipe 17, and a hot water valve and a warm water valve electrically connected to the touch control panel 11 are respectively arranged at the hot water outlet 8 and the warm water outlet 9. Users can operate the water dispenser to discharge water by pressing the warm water button and the hot water button on the touch control panel 11, and adjust the water outlet temperature of the hot water outlet 8 by pressing the temperature adjustment button.

[0051] Refer to Figures 1 - 4 , a first liquid level sensing device is arranged in the water storage tank 2, the water inlet pipe 3 is connected to one side of the top of the water storage tank 2, a water inlet valve 5 is arranged on the water inlet pipe 3, one end of the water delivery pipe 4 is connected to the bottom end of the water storage tank 2 and the other end is connected to the water inlet of the bottom end of the electric heating module 7, and a water pump 6 is arranged on the water delivery pipe 4; a second liquid level sensing device is arranged in the intermediate water tank 16; a temperature control sensor is arranged on the electric heating module 7, and the water inlet valve 5, the drain valve 29 and the chemical dosing valve 27 are of solenoid valve structures. The main control board 12 is electrically connected to the electric heating module 7, the first liquid level sensing device, the second liquid level sensing device, the water inlet valve 5, the circulation water pump 18, the first solenoid valve 44, the second solenoid valve 46, the third solenoid valve 49, the fourth solenoid valve 23, the chemical dosing valve 27, the drain valve 29, the temperature control sensor and the touch control panel 11. The first liquid level sensing device and the second liquid level sensing device are used to check the water levels in the water storage tank 2 and the intermediate water tank 16. The main control board 12 judges whether to control the water inlet valve 5 to open to inject water into the water storage tank 2 and whether to control the water pump 6 to start to pump the water in the water storage tank 2 to the electric heating module 7 for heating and then inject it into the intermediate water tank 16 according to the monitoring data of the first liquid level sensing device and the second liquid level sensing device.

[0052] A control method for a self-cleaning pipeline water dispenser includes the following steps:

[0053] S1. The main control board 12 controls the water pump 6 to pump the water in the water storage tank 2 to the electric heating module 7 for heating to boiling according to the water level monitoring data of the second liquid level sensing device in the intermediate water tank 16. The boiling water after passing through the electric heating module 7 enters the water outlet tank 13 and then is injected into the intermediate water tank 16 for temporary storage through the overflow pipe 15. At the same time, the main control board 12 can control the output power of the water pump 6 according to the pressure monitoring data of the hydraulic sensor 50, adjust the water pressure in pipelines such as the water delivery pipe 4. When the monitored water pressure is higher than the set value, such as the water pressure is greater than 0.1 MPa, the working power of the water pump 6 will be reduced to prevent the water pressure in the pipeline from being too high and the water flow rate from being too fast to damage the pipeline, and ensure the normal operation of the pipeline in the water dispenser.

[0054] S2. When warm water needs to be taken, the warm water valve is controlled to open by pressing the warm water button on the touch control panel 11, and the warm water in the intermediate water tank 16 can flow out through the warm water output pipe 17 and the warm water outlet 9;

[0055] S3. When boiling water needs to be taken, the hot water valve is controlled to open and the water pump 6 and the electric heating module 7 are controlled to start by pressing the hot water button on the touch control panel 11. The boiling water heated by the electric heating module 7 flows out through the water outlet groove 13, the hot water output pipe 14, and the hot water outlet 8;

[0056] S4. When the pipelines in the machine body 1 need to be cleaned, first, the main control board 12 controls the cleaning agent dosing device 21 to add cleaning agent into the water storage tank 2, and then the circulating water module is used to make the mixed liquid in the pipelines circulate, and the cleaning agent solution is used to disinfect the pipelines and dissolve the water scale; then the multi-position high-pressure spray washing module 100 is controlled to perform high-pressure water flow washing on multiple flushing points in the pipelines where water scale is likely to accumulate, and the water scale is washed off; then the main control board 12 controls the backwashing module to start to change the water flow direction in the water delivery pipe 4, and the high-temperature hot water performs reverse flushing on the water delivery pipe 4 and the electric heating module 7, and the waste water is discharged from the drain pipe 10. The pipelines are soaked with the citric acid cleaning agent solution, and then the multi-position high-pressure spray washing module 100 is used to perform high-speed water flow spraying on the positions where water scale is likely to accumulate in the pipelines, such as the bends of the pipelines, to ensure that the water scale on the pipe wall is washed off, and then the pipeline is flushed by the backwashing module, and the water scale and other impurities are transported to the drain pipe 10 for discharge, completing the pipeline self-cleaning work of the pipeline drinking water machine.

[0057] In the control method of the self-cleaning pipeline drinking water machine of the present invention, when the pipelines in the machine body 1 are cleaned, first, the main control board 12 controls the cleaning agent dosing device 21 to add cleaning agent into the water storage tank 2, and then the circulating water module controls the water pump 6 and the circulating water pump 18 to start and opens the third solenoid valve 49 to draw the water in the intermediate water tank 16 back to the water storage tank 2, and then the water storage tank 2 transports it to the intermediate water tank 16 to form a closed loop, so that the mixed liquid in the pipelines circulates, and the cleaning agent solution soaks and dissolves the water scale in the pipelines and sterilizes the pipelines;

[0058] Then, the main control board 12 controls the circulating water pump 18 to start and opens the first solenoid valve 44. The circulating water pump 18 draws the water in the intermediate water tank 16 into the high-pressure common rail pipe 41, and then it is transported to the needle nozzles 43 through the respective flushing branch pipes 42. The needle nozzles 43 spray high-speed water flow to perform spray washing on each flushing point to make the dirt fall off;

[0059] Then, the main control board 12 controls the start of the water pump 6, the electric heating module 7, and the circulating water pump 18, and opens the second solenoid valve 46 and the reversing valve 47, extracts the high-temperature hot water in the intermediate water tank 16 to the water outlet trough 13, uses the water pump 6 to reversely extract the water in the water outlet trough 13 into the water delivery pipe 4, the high-temperature water performs backwashing on the water delivery pipe 4 to convey the sewage in the pipeline to the drain pipe 10, and finally discharges the sewage.

[0060] In the control method of the self-cleaning pipeline water dispenser of the present invention, when hot water of different temperatures is needed, the hot water temperature is adjusted by touching the temperature adjustment button on the operation panel 11, and the hot water valve is controlled to open by pressing the hot water button on the operation panel 11. At the same time, the circulating water pump 18 and the electric heating module 7 are controlled to start, and the fourth solenoid valve 23 on the secondary heating water supply pipe 22 is controlled to open. After the warm water in the intermediate water tank 16 is extracted to the electric heating module 7 and heated to the set temperature, the hot water flows out through the water outlet trough 13, the hot water output pipe 14, and the hot water outlet 8, and the user can obtain hot water at any temperature to meet the user's needs.

[0061] In order to better and effectively clean each pipe section in the pipeline water dispenser, in the above step S4, when the multi-position high-pressure spraying module 100 performs high-pressure water flow flushing on multiple flushing points in the pipeline:

[0062] Control the multi-position high-pressure spraying module 100 to sequentially perform high-speed water flow spraying on multiple flushing points on the secondary heating water supply pipe 22, the backwashing pipe 45, the circulating pipe 48, and the water delivery pipe 4 separately, and perform separate backwashing on the secondary heating water supply pipe 22, the backwashing pipe 45, the circulating pipe 48, and the water delivery pipe 4 through the backwashing module. In this embodiment, control the multi-position high-pressure spraying module 100 to first perform high-speed water flow spraying and backwashing on the pipe section downstream of the water delivery pipe 4. During backwashing, the dirt in the downstream pipe section is likely to accumulate at the bend of the upstream water delivery pipe 4. Then, perform high-speed water flow spraying and backwashing operations on the water delivery pipe 4, and the newly accumulated dirt and the old dirt in the water delivery pipe 4 can be sprayed and dropped together. The dirt is conveyed to the drain pipe 10 through backwashing, ensuring that the dirt in each pipe section is completely cleaned, and avoiding the situation where secondary dirt accumulation cannot be cleaned in time.

[0063] The specific operation method is as follows. First, the multi-position high-pressure spraying module 100 performs high-speed water flow spraying on multiple flushing points on the secondary heating water supply pipe 22 that are prone to scale accumulation. After the scale on the wall of the secondary heating water supply pipe 22 is sprayed and fallen off, the main control board 12 controls the circulating water pump 18 and the water pump 6 to start, controls the fourth solenoid valve 23 and the drain valve 29 to open, and controls the reversing valve 47 to change the water flow direction of the water delivery pipe 4, extracts the water in the intermediate water tank 16 to wash the secondary heating water supply pipe 22 and the water delivery pipe 4, and discharges the waste water from the drain pipe 10;

[0064] Next, the multi-site high-pressure flushing module 100 performs high-speed water flow flushing on multiple flushing points on the backflush pipe 45 that are prone to scale accumulation. After the scale on the wall of the backflush pipe 45 is flushed off, the main control board 12 controls the start of the circulation water pump 18 and the extraction water pump 6, and controls the opening of the second solenoid valve 46 and the drain valve 29, and controls the reversing valve 47 to change the water flow direction of the water delivery pipe 4, extracts the water in the intermediate water tank 16 to flush the backflush pipe 45, the electric heating module 7, and the water delivery pipe 4, and discharges the waste water from the drain pipe 10;

[0065] Then, the multi-site high-pressure flushing module 100 performs high-speed water flow flushing on multiple flushing points on the circulation pipe 48 that are prone to scale accumulation. After the scale on the wall of the circulation pipe 48 is flushed off, the main control board 12 controls the start of the circulation water pump 18 and the extraction water pump 6, and controls the opening of the third solenoid valve 49 and the drain valve 29, and controls the reversing valve 47 to change the water flow direction of the water delivery pipe 4, extracts the water in the intermediate water tank 16 to flush the circulation pipe 48, and discharges the waste water from the drain pipe 10;

[0066] Finally, the multi-site high-pressure flushing module 100 performs high-speed water flow flushing on multiple flushing points on the water delivery pipe 4 that are prone to scale accumulation. After the scale on the wall of the water delivery pipe 4 is flushed off, the main control board 12 controls the start of the circulation water pump 18 and controls the opening of the second solenoid valve 46 and the drain valve 29, and controls the reversing valve 47 to change the water flow direction of the water delivery pipe 4, extracts the water in the intermediate water tank 16 to flush the water delivery pipe 4, and discharges the waste water from the drain pipe 10.

[0067] The foregoing description of the specific exemplary embodiments of the present invention is for the purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed. Although the embodiments of the present invention have been shown and described, the specific embodiments are only interpretations of the present invention and not limitations thereof. The specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can, after reading this specification, make modifications, substitutions, variations, and various different selections and changes that do not make creative contributions to the embodiments according to their needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A self-cleaning pipeline water dispenser, comprising a machine body, a water storage tank, a water inlet pipe, a water delivery pipe, a water inlet valve, a water pump, an electric heating module, a hot water outlet, a warm water outlet, a drain pipe, a drain valve, a touch control panel and a main control board, characterized in that, The machine body is provided with a multi - part high - pressure flushing module and a back - flushing module. The multi - part high - pressure flushing module includes a water outlet tank, an intermediate water tank, a circulation water pump and a high - pressure common rail pipe connected to the water outlet of the top end of the electric heating module. The intermediate water tank is connected to the water outlet tank through an overflow pipe. The input end of the circulation water pump is connected to the intermediate water tank, and the output end is connected to the high - pressure common rail pipe. Multiple flushing branch pipes are provided on the high - pressure common rail pipe, and needle - type nozzles are provided at the ends of the multiple flushing branch pipes. Multiple flushing points connected to the multiple needle - type nozzles are provided on the water delivery pipe. Multiple hydraulic sensors are provided on the water delivery pipe. The main control board can control the output power of the water extraction pump according to the pressure monitoring data of the hydraulic sensors.

2. The self-cleaning pipeline water dispenser according to claim 1, characterized in that The back - flushing module includes a first electromagnetic valve provided on the pipe section where the circulation water pump is connected to the high - pressure common rail pipe. The output end of the circulation water pump is connected with a back - flushing pipe. One end of the back - flushing pipe is communicated with the water outlet tank. A second electromagnetic valve is provided on the back - flushing pipe. A reversing valve is provided between the water extraction pump and the water delivery pipe.

3. The self-cleaning pipeline water dispenser according to claim 2, wherein, The machine body is provided with a circulating water module. The circulating water module includes a circulating pipe connected to the output end of the circulation water pump. A flushing nozzle is provided at the top of the storage water tank. The circulating pipe is connected to the input end of the flushing nozzle. A third electromagnetic valve is provided on the circulating pipe. A cleaning agent dosing device is provided at the top of the storage water tank.

4. The self-cleaning pipeline water dispenser according to claim 3, characterized in that, The cleaning agent dosing device includes a cleaning agent dosing tank provided at the top of the storage water tank. A dosing pipe communicated with the circulating pipe is provided at the bottom of the cleaning agent dosing tank. A one - way valve and a dosing valve are provided on the dosing pipe.

5. The self-cleaning pipeline water dispenser according to claim 4, wherein The output end of the circulation water pump is connected with a secondary heating water supply pipe communicated with the water inlet of the electric heating module. A fourth electromagnetic valve is provided on the secondary heating water supply pipe; multiple flushing points of the needle - type nozzles are provided on the back - flushing pipe, the circulating pipe and the secondary heating water supply pipe.

6. The self-cleaning pipeline water dispenser according to claim 5, characterized in that, One side of the bottom of the intermediate water tank is provided with a warm water output pipe. The upper part of the front end of the machine body is provided with a water outlet seat. The touch control panel is arranged on the front end face of the water outlet seat. The hot water outlet and the warm water outlet are arranged at the bottom end of the water outlet seat. The hot water outlet and the warm water outlet are respectively communicated with the hot water output pipe and the warm water output pipe.

7. The self-cleaning pipeline water dispenser according to claim 6, wherein A first liquid level sensing device is arranged in the storage water tank, and a second liquid level sensing device is arranged in the intermediate water tank; the main control board is electrically connected to the electric heating module, the first liquid level sensing device, the second liquid level sensing device, the water inlet valve, the circulation water pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the dosing valve, the drain valve and the touch control panel.

8. A control method for a self-cleaning pipeline drinking fountain, which uses a self-cleaning pipeline drinking fountain as described in claim 7, characterized in that, Including the following steps: S1. The main control board controls the water extraction pump to extract the water in the storage water tank to the electric heating module for heating to boiling according to the water level monitoring data of the second liquid level sensing device in the intermediate water tank. The boiling water after passing through the electric heating module enters the water outlet tank, and then is injected into the intermediate water tank through the overflow pipe for temporary storage. S2. When warm water needs to be taken, the warm water valve is controlled to open by pressing the warm water button on the touch control panel, and the warm water in the intermediate water tank can flow out through the warm water output pipe and the warm water outlet. S3. When hot water needs to be taken, press the hot water button on the touch control panel to control the opening of the hot water valve and start the water extraction pump and the electric heating module. The boiled water heated by the electric heating module flows out through the water outlet tank, the hot water output pipe, and the hot water outlet. S4. When the pipeline inside the machine needs to be cleaned, first, the main control board controls the cleaning agent dosing device to add cleaning agent into the water storage tank, and then the circulating water module is used to make the mixed liquid in the pipeline circulate. Then, control the multi-position high-pressure spray washing module to carry out high-pressure water flow washing on multiple flushing points in the pipeline. Next, the main control board controls the backwashing module to change the water flow direction in the water delivery pipe, carry out reverse flushing on the pipeline, and discharge the waste water from the drain pipe.

9. The control method of a self-cleaning pipeline drinking fountain according to claim 8, characterized in that, When hot water of different temperatures needs to be taken, adjust the hot water temperature by pressing the temperature adjustment button on the touch control panel, and press the hot water button on the touch control panel to control the opening of the hot water valve. At the same time, start the circulating water pump and the electric heating module, and control the opening of the fourth solenoid valve on the secondary heating water supply pipe. Extract the warm water in the intermediate water tank to the electric heating module for heating to the set temperature, and then the hot water flows out through the water outlet tank, the hot water output pipe, and the hot water outlet.

10. The control method of a self-cleaning pipeline water dispenser according to claim 8, characterized in that, In the above step S4, when the multi-position high-pressure spray washing module is used to carry out high-pressure water flow washing on multiple flushing points in the pipeline: Control the multi-position high-pressure spray washing module to sequentially carry out high-speed water flow spraying on multiple flushing points on the secondary heating water supply pipe, the backwashing pipe circulation pipe, and the water delivery pipe separately, and carry out separate backwashing on the secondary heating water supply pipe, the backwashing pipe circulation pipe, and the water delivery pipe through the backwashing module.

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