Pressure sensor and direct drinking machine

Abstract

This invention relates to the field of direct drinking water machine technology and discloses a pressure sensor and a direct drinking water machine, including a main board, a pressure diaphragm, and an encapsulation cover. The pressure diaphragm is encapsulated in a groove in the main board. The encapsulation cover is fixedly connected to the surface of the main board, and a positioning ring is fixedly connected to the surface of the encapsulation cover. A fitting is threadedly connected to the inner wall of the positioning ring, and a support block is threadedly connected to the inner wall of the fitting. The support block movably abuts against the surface of the pressure diaphragm. A groove is formed at the end of the support block away from the pressure diaphragm, and a prismatic protrusion is provided on the inner wall of the groove on the support block. In this invention, by setting the positioning ring, fitting, support block, and prismatic protrusion, the contact surface of the pressure sensor is replaced by the support block. This addresses the accuracy drift problem caused by the calcium layer, making it particularly suitable for direct drinking water machine scenarios with high water hardness. While ensuring the accuracy of pressure monitoring, it significantly reduces the maintenance cost and downtime losses throughout the equipment's life cycle.

Description

Technical Field

[0001] This invention relates to the field of direct drinking water technology, specifically to a pressure sensor and a direct drinking water machine. Background Technology

[0002] Pressure sensors are devices used to detect the pressure of fluids or gases and convert it into electrical signals. They are mostly composed of sensitive elements (such as diaphragms or bellows) and conversion circuits. They achieve accurate measurement (accuracy up to 0.1%FS) by measuring the deformation or resistance change caused by pressure. They are widely used in industrial control, medical equipment and other fields.

[0003] Direct drinking water purifiers are devices that deeply purify water sources through a multi-stage filtration system (PP cotton, activated carbon, RO membrane, etc.), removing impurities, bacteria, and heavy metals to make the water meet direct drinking standards. They are often equipped with heating / cooling functions and intelligent control systems to meet the safe drinking water needs of homes, offices, and other scenarios. Some existing direct drinking water purifiers integrate pressure sensors into their devices. These pressure sensors are embedded in the water circuit system and linked to the main control chip. When abnormal inlet water pressure is detected, the machine automatically shuts down to protect against damage to the filter or leakage. At the same time, it can monitor the water pressure changes before and after the filter in real time. When the pressure difference exceeds the threshold, it prompts the user to replace the filter, ensuring the filtration efficiency and water quality safety of the direct drinking water purifier.

[0004] (i) In the application of pressure sensors integrated into the filter cartridges of direct drinking water machines, due to the long-term filtration of water containing impurities, such as hard water with calcium and magnesium ion concentrations ≥100mg / L, a calcium scale layer of 0.1-0.5mm thick will form on the surface of the pressure membrane. These attached impurities cover the sensor membrane through the dual effects of physical deposition and chemical crystallization, reducing the pressure transmission efficiency by 30%-50%, directly causing the sensor sensitivity to decrease. Originally, a water pressure change of 0.01MPa could trigger the signal output, but after scaling, a pressure fluctuation of 0.03-0.05MPa is required to respond, resulting in a delay in the filter cartridge blockage warning and seriously affecting the accurate monitoring of the filter cartridge status of the direct drinking water machine.

[0005] (ii) In the scenario of using a water purifier with a pressure sensor installed, when the distance between the water outlet and the water cup opening exceeds 5cm, the impact and splashing phenomenon caused by the water flow due to gravity acceleration is significant. When the distance reaches 10cm, the splashing droplets generated by the water flow impacting the bottom of the cup can cover a radius of 15cm in the water receiving area, resulting in an average accumulation of 0.5-1mL of water stains on the control panel and water receiving surface of the water purifier every minute. These splashing water stains not only require users to spend 10-20 seconds wiping and cleaning after filling the water, but may also seep into the gaps of the control panel, causing the risk of short circuit and increasing the burden of equipment maintenance. Therefore, we propose a pressure sensor and a water purifier. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a pressure sensor and a direct drinking water machine. It solves the problem that existing direct drinking water machines equipped with pressure sensors often suffer from a 0.1-0.5mm thick calcium scale layer forming on the pressure diaphragm surface. These deposited impurities, through both physical deposition and chemical crystallization, cover the sensing diaphragm, reducing pressure transmission efficiency by 30%-50% and directly causing sensor sensitivity degradation. Furthermore, in some direct drinking water machine usage scenarios with pressure sensors, when the distance between the water outlet and the cup opening exceeds 5cm, significant water splashing due to gravity occurs. When the distance reaches 10cm, the splashing droplets from the water impacting the cup bottom can cover a 15cm radius area, resulting in an average accumulation of 0.5-1mL of water stains per minute on the control panel and water dispenser surface. These splashed water stains not only require users to spend 10-20 seconds wiping and cleaning after dispensing water but may also seep into the control panel gaps, posing a short circuit risk and increasing the burden of equipment maintenance.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pressure sensor and a direct drinking water machine, comprising a main board, a pressure membrane, and an encapsulation cover. The pressure membrane is encapsulated in a groove of the main board. The encapsulation cover is fixedly connected to the surface of the main board. A positioning ring is fixedly connected to the surface of the encapsulation cover. An assembly is threadedly connected to the inner wall of the positioning ring. A bearing block is threadedly connected to the inner wall of the assembly. The bearing block movably abuts against the surface of the pressure membrane.

[0008] Preferably, the end of the bearing block away from the pressure membrane has a groove, and the inner wall of the bearing block in the groove has a prismatic protrusion. The prismatic protrusion can make the surface of the bearing block in contact with the water source uneven, so that the side of the bearing block in contact with the water source can guide the water source. The guided water source can rinse the surface of the bearing block. At the same time, the prismatic protrusion can reduce the adhesion of scale, further reducing the probability of scale adhesion.

[0009] Preferably, it also includes a body, a water outlet, a cover plate, a filter compartment one, a filter compartment two, and a filter compartment three. The water outlet is integrated into the water outlet end of the body. The cover plate is magnetically installed on the inner wall of the body. The filter compartment one is installed on the inner wall of the body via a bracket. The main board is fixedly connected to the inner wall of the filter compartment one. The filter compartment two is installed on the inner wall of the body via a bracket. The filter compartment three is installed on the inner wall of the body via a bracket. The inner wall of the body is provided with auxiliary devices.

[0010] The auxiliary device includes a diaphragm pump, which is fixedly connected to the inner wall of the machine body. The output end of the diaphragm pump is fixedly connected to a solenoid valve through a pipe. The output end of the solenoid valve is fixedly connected to a conduit. A three-way connector is fixedly connected to the inner wall of the conduit. An air pipe is fixedly connected to the inner wall of the three-way connector. An air inlet connector is fixedly connected to the output end of the air pipe. A support column is fixedly connected to the inner wall of the machine body. An assembly groove is formed on the upper surface of the support column. The air inlet connector is threaded to the inner wall of the assembly groove. An air delivery hole is formed on the inner wall of the assembly groove of the support column.

[0011] A fixed plate is fixedly connected to the surface of the support column. A folded airbag is fixedly connected to the lower surface of the fixed plate. A sealing mechanism is installed on the lower surface of the folded airbag. A linkage frame is fixedly connected to the surface of the sealing mechanism. A mounting frame is fixedly connected to the surface of the linkage frame. A disc is fixedly connected to the lower surface of the mounting frame. A sealing capsule is fixedly connected to the inner wall of the disc. A pressure sensing element is fixedly connected to the inner wall of the disc. By utilizing the cooperation between the disc and the sealing capsule, the pressure sensing element can be sealed in a designated space. At the same time, when the sealing capsule comes into contact with the mouth of the cup, the cup will squeeze the sealing capsule, causing the air pressure inside the sealing capsule to increase. When the pressure sensing element detects the increase in air pressure, it will control the diaphragm pump.

[0012] Preferably, the upper surface of the body is provided with a square hole, and an air inlet is fixedly connected to the inner wall of the square hole. The air inlet is fixedly connected to the output end of the diaphragm pump through a pipe. The air inlet can provide outside air to the diaphragm pump and filter the air entering the diaphragm pump, reducing the probability of impurities in the air entering the diaphragm pump.

[0013] Preferably, the sealing mechanism includes a support ring, which is fixedly connected to the lower surface of the folding airbag. The support ring is sleeved on the surface of the support column. A sleeve is fixedly connected to the lower surface of the support ring. A first sealing ring is installed on the inner wall of the sleeve, which is sleeved on the surface of the support column. A pressure ring is installed on the inner wall of the sleeve, which is sleeved on the surface of the support column. A second sealing ring is installed on the inner wall of the sleeve, which is sleeved on the surface of the support column. A locking ring is threadedly connected to the inner wall of the sleeve, which is sleeved on the surface of the support column. By utilizing the cooperation between the locking ring and the sleeve, the second sealing ring can be pressed after the locking ring is tightened, thereby increasing the contact strength between the second and first sealing rings and the support column, and improving the sealing effect of the second and first sealing rings.

[0014] Preferably, the lower surface of the water outlet is provided with a telescopic mechanism, which includes a telescopic tube one, which is fixedly connected to the lower surface of the water outlet. A telescopic tube two is slidably connected to the surface of the telescopic tube one, a telescopic tube three is slidably connected to the surface of the telescopic tube two, and a telescopic tube four is slidably connected to the surface of the telescopic tube three. The telescopic tube four is fixedly connected to the inner wall of the mounting frame. By using the telescopic tube one, telescopic tube two, telescopic tube three, and telescopic tube four, the water source at the water outlet can be guided so that the flow direction of the water source can be restricted within a specified range when it is pumped out.

[0015] Preferably, the air inlet connector is installed inside the body and communicates with the interior of the assembly slot. The air outlet is located inside the folding airbag. Air can be pumped into the folding airbag through the air outlet, so that the folding airbag unfolds in a specified direction after air is injected and drives the sealing mechanism to move.

[0016] Preferably, the number of pressure sensing elements is two, and the two pressure sensing elements are distributed in an equidistant array with reference to the center of the disk.

[0017] Preferably, the first sealing ring has a threaded protrusion inside, the pressure ring is in movable contact with the surface of the first sealing ring, and the pressure ring is L-shaped. The second sealing ring is in movable contact with the surface of the pressure ring, and the second sealing ring is L-shaped. The locking ring is in movable contact with the surface of the second sealing ring. By using the cooperation of the first sealing ring, the second sealing ring and the pressure ring, the support ring and the support column can be sealed, thereby ensuring the airtightness of the internal space of the folding airbag and improving the stability of the folding airbag in use.

[0018] Preferably, the surfaces of telescopic tube one, telescopic tube two, and telescopic tube three are all provided with guide grooves, and the inner walls of telescopic tube two, telescopic tube three, and telescopic tube four are all provided with guide blocks that are adapted to the guide grooves. By using the cooperation of the guide grooves and guide blocks, the movement direction of telescopic tube one, telescopic tube two, telescopic tube three, and telescopic tube four can be guided to ensure the stability of the telescopic mechanism during the telescopic process.

[0019] In summary, the technical effects and advantages of this invention are as follows:

[0020] 1. In this invention, a sensor protection system of "isolated pressure transmission + self-cleaning" is constructed by setting a pressure transmission protection structure consisting of a positioning ring, a mounting kit, a bearing block, and a prismatic protrusion: the water source pressure is indirectly transmitted to the pressure membrane through the bearing block, and the bearing block made of food-grade POM material (Shore hardness 85A) is used as a medium to completely isolate the pressure membrane from the water source, avoiding direct contact between calcium and magnesium ions, particulate matter and other impurities with the membrane; the prismatic protrusion adopts a fluid dynamics design (angle 60°±5°), which forms a turbulent scouring effect when water flows through it, so that the impurity removal rate on the surface of the bearing block reaches more than 95%, inhibiting the deposition of calcium layer from the source;

[0021] This device optimizes maintenance costs through modular design. The quick-release structure of the positioning ring and the mounting kit allows for independent replacement of the bearing block, reducing the cost of a single maintenance by 75% compared to replacing the pressure sensor. The surface of the bearing block is treated with a Teflon coating, further reducing the probability of impurity adhesion and ensuring that the sensor pressure transmission error remains stable within ±1.5%FS for a long period, extending the accuracy decay period by more than 3 times compared to the non-isolated solution. By setting up the positioning ring, mounting kit, bearing block, and prismatic protrusions, the contact surface of the pressure sensor is replaced by the bearing block, which solves the accuracy drift problem caused by the calcium layer. It is especially suitable for direct drinking water machines with high water hardness, ensuring the accuracy of pressure monitoring while significantly reducing the maintenance cost and downtime losses throughout the equipment's life cycle.

[0022] 2. By incorporating an auxiliary device consisting of a diaphragm pump, solenoid valve, conduit, folding airbag, sealing mechanism, and pressure sensor, an "adaptive sealing-splash prevention" system is constructed for the direct drinking water dispenser: When water is dispensed from the machine and triggers the pressure sensor, the diaphragm pump inflates the folding airbag through the air pipe, driving the sealing mechanism to move along the support guide, ensuring the sealing capsule precisely fits the rim of the cup. The sealing capsule is made of food-grade silicone, exhibiting an elastic deformation of 1.2-1.5mm upon contact with the cup rim. Changes in its own air pressure trigger the pressure sensing unit to shut off the power, forming a flexible seal that adapts to the shape of the cup rim, creating a semi-enclosed water receiving space.

[0023] This design utilizes an "inflatable drive - flexible sealing - pressure self-limiting" mechanism to increase the sealing rate between the water outlet and the cup opening to over 98%, strictly limiting water splashing to within the cup. The arc-shaped contact surface of the sealing capsule adapts to various cups with diameters of 50-120mm, solving the problem of splash prevention when filling different sized containers. The extension stroke of the folding airbag (30-80mm) is compatible with cups of different heights, eliminating the need for manual adjustment by the user. By incorporating an auxiliary device, the water dispenser can cover the cup opening when dispensing water, creating a semi-enclosed space for the cup during dispensing. This reduces water splashing around the dispenser due to the distance between the outlet and the cup, preventing users from spending time cleaning the area afterward. This automated sealing mechanism improves the user experience of the water dispenser while maintaining a clean dispensing area. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a pressure sensor according to the present invention;

[0025] Figure 2 This is a cross-sectional structural schematic diagram of a pressure sensor according to the present invention;

[0026] Figure 3 This invention relates to a pressure sensor. Figure 2 Schematic diagram of the structure at point A in the middle;

[0027] Figure 4 This is a schematic diagram of the overall structure of a pressure sensor and a direct drinking water machine according to the present invention;

[0028] Figure 5 This is a front view of a pressure sensor and a direct drinking water machine according to the present invention;

[0029] Figure 6 This is a side view of a pressure sensor and a direct drinking water machine according to the present invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of a pressure sensor and a direct drinking water machine according to the present invention;

[0031] Figure 8 This invention relates to a pressure sensor and a direct drinking water machine. Figure 7 Schematic diagram of the middle section;

[0032] Figure 9 This is a schematic diagram of the structure of a pressure sensor and an auxiliary device for a direct drinking water machine according to the present invention;

[0033] Figure 10 This is a cross-sectional view of the auxiliary structure of a pressure sensor and a direct drinking water machine according to the present invention;

[0034] Figure 11This invention relates to a pressure sensor and a direct drinking water machine. Figure 10 Schematic diagram of the structure at point B;

[0035] Figure 12 This is a partial structural diagram of a pressure sensor and an auxiliary device for a direct drinking water machine according to the present invention;

[0036] Figure 13 This is a schematic diagram of the sealing mechanism structure of a pressure sensor and a direct drinking water machine according to the present invention;

[0037] Figure 14 This is a schematic diagram of the telescopic mechanism of a pressure sensor and a direct drinking water machine according to the present invention;

[0038] Figure 15 This is a schematic diagram of the extended state of the telescopic mechanism of a pressure sensor and a direct drinking water machine according to the present invention.

[0039] In the diagram: 1. Mainboard; 2. Pressure diaphragm; 3. Encapsulation cover; 4. Positioning ring; 5. Assembly kit; 6. Carrier block; 61. Prism-shaped protrusion;

[0040] 7. Fuselage;

[0041] 8. Auxiliary devices; 81. Diaphragm pump; 82. Air inlet; 83. Solenoid valve; 84. Conduit; 85. T-connector; 86. Air pipe; 87. Air inlet connector; 88. Support column; 881. Assembly slot; 882. Air outlet; 89. Fixing plate; 810. Folding airbag;

[0042] 811. Sealing mechanism; 8111. Support ring; 8112. Sleeve; 8113. Sealing ring one; 8114. Pressure ring; 8115. Sealing ring two; 8116. Locking ring;

[0043] 812. Linkage frame; 813. Mounting frame; 814. Disc; 815. Sealing capsule;

[0044] 816. Telescopic mechanism; 8161. Telescopic tube one; 8162. Telescopic tube two; 8163. Telescopic tube three; 8164. Telescopic tube four;

[0045] 817. Pressure sensing element;

[0046] 9. Water outlet; 10. Cover plate; 11. Filter compartment one; 12. Filter compartment two; 13. Filter compartment three. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] refer to Figures 1-15 The pressure sensor and direct drinking water machine shown include a main board 1, a pressure diaphragm 2 and an encapsulation cover 3. The pressure diaphragm 2 is encapsulated in a groove in the main board 1. The encapsulation cover 3 is fixedly connected to the surface of the main board 1. A positioning ring 4 is fixedly connected to the surface of the encapsulation cover 3. A mounting device 5 is threadedly connected to the inner wall of the positioning ring 4. A bearing block 6 is threadedly connected to the inner wall of the mounting device 5. The bearing block 6 is in movable contact with the surface of the pressure diaphragm 2.

[0049] Preferably, a groove is provided at the end of the support block 6 away from the pressure membrane 2, and a prismatic protrusion 61 is provided on the inner wall of the groove of the support block 6. By using the prismatic protrusion 61, the surface of the support block 6 on the side that contacts the water source can be made into an uneven shape, so that the side of the support block 6 that contacts the water source can guide the water source. The guided water source can rinse the surface of the support block 6. At the same time, the prismatic protrusion 61 can reduce the adhesion of scale and further reduce the probability of scale adhesion.

[0050] Preferably, it also includes a body 7, a water outlet 9, a cover plate 10, a first filter compartment 11, a second filter compartment 12, and a third filter compartment 13. The water outlet 9 is integrated into the water outlet end of the body 7. The cover plate 10 is magnetically installed on the inner wall of the body 7. The first filter compartment 11 is installed on the inner wall of the body 7 through a bracket. The main board 1 is fixedly connected to the inner wall of the first filter compartment 11. The second filter compartment 12 is installed on the inner wall of the body 7 through a bracket. The third filter compartment 13 is installed on the inner wall of the body 7 through a bracket. An auxiliary device 8 is provided on the inner wall of the body 7.

[0051] The auxiliary device 8 includes a diaphragm pump 81, which is fixedly connected to the inner wall of the machine body 7. The output end of the diaphragm pump 81 is fixedly connected to a solenoid valve 83 through a pipe. The output end of the solenoid valve 83 is fixedly connected to a conduit 84. The inner wall of the conduit 84 is fixedly connected to a three-way connector 85. The inner wall of the three-way connector 85 is fixedly connected to an air pipe 86. The output end of the air pipe 86 is fixedly connected to an air inlet connector 87. The inner wall of the machine body 7 is fixedly connected to a support column 88. An assembly groove 881 is opened on the upper surface of the support column 88. The air inlet connector 87 is threadedly connected to the inner wall of the assembly groove 881. An air delivery hole 882 is opened on the inner wall of the assembly groove 881 of the support column 88.

[0052] A fixed plate 89 is fixedly connected to the surface of the support column 88. A folding airbag 810 is fixedly connected to the lower surface of the fixed plate 89. A sealing mechanism 811 is installed on the lower surface of the folding airbag 810. A linkage frame 812 is fixedly connected to the surface of the sealing mechanism 811. A mounting frame 813 is fixedly connected to the surface of the linkage frame 812. A disc 814 is fixedly connected to the lower surface of the mounting frame 813. A sealing capsule 815 is fixedly connected to the inner wall of the disc 814. A pressure sensing element 817 is fixedly connected to the inner wall of the disc 814. By using the cooperation between the disc 814 and the sealing capsule 815, the pressure sensing element 817 can be sealed in a specified space. At the same time, when the sealing capsule 815 contacts the mouth of the cup, the cup will squeeze the sealing capsule 815, causing the air pressure inside the sealing capsule 815 to rise. When the pressure sensing element 817 detects the rise in air pressure, it will control the diaphragm pump 81.

[0053] The upper surface of the body 7 has a square hole, and an air inlet 82 is fixedly connected to the inner wall of the square hole. The air inlet 82 is fixedly connected to the output end of the diaphragm pump 81 through a pipe. The air inlet 82 can provide outside air to the diaphragm pump 81 and filter the air entering the diaphragm pump 81, reducing the probability of impurities in the air entering the diaphragm pump 81.

[0054] The sealing mechanism 811 includes a support ring 8111, which is fixedly connected to the lower surface of the folding airbag 810. The support ring 8111 is sleeved on the surface of the support column 88. A sleeve 8112 is fixedly connected to the lower surface of the support ring 8111. A sealing ring 8113 is installed on the inner wall of the sleeve 8112, and the sealing ring 8113 is sleeved on the surface of the support column 88. A pressure ring 8114 is installed on the inner wall of the sleeve 8112, and the pressure ring 8114 is sleeved on the surface of the support column 88. A sealing ring 8114 is also installed on the inner wall of the sleeve 8112. Sealing ring 2 8115 is fitted onto the surface of support column 88. Locking ring 8116 is threaded onto the inner wall of sleeve 8112. Locking ring 8116 is fitted onto the surface of support column 88. By cooperating with sleeve 8112, locking ring 8116 can be tightened to compress sealing ring 2 8115, thereby increasing the contact strength between sealing ring 2 8115, sealing ring 1 8113 and support column 88, and improving the sealing effect of sealing ring 2 8115 and sealing ring 1 8113.

[0055] The lower surface of the outlet 9 is provided with a telescopic mechanism 816, which includes a first telescopic tube 8161, which is fixedly connected to the lower surface of the outlet 9. A second telescopic tube 8162 is slidably connected to the surface of the first telescopic tube 8161, a third telescopic tube 8163 is slidably connected to the surface of the second telescopic tube 8162, and a fourth telescopic tube 8164 is slidably connected to the surface of the third telescopic tube 8163. The fourth telescopic tube 8164 is fixedly connected to the inner wall of the mounting frame 813. The water source of the outlet 9 can be guided by the first telescopic tube 8161, the second telescopic tube 8162, the third telescopic tube 8163, and the fourth telescopic tube 8164, so that the flow direction of the water source can be restricted within a specified range when it is pumped out.

[0056] The air inlet connector 87 is installed inside the body 7 and is connected to the inside of the assembly slot 881. The air outlet 882 is located inside the folding airbag 810. Air can be pumped into the folding airbag 810 through the air outlet 882, so that the folding airbag 810 unfolds in a specified direction after air is injected and pushes the sealing mechanism 811 to move.

[0057] The pressure sensing element 817 consists of two elements, which are arranged in an equidistant array with reference to the center of the disk 814.

[0058] Among them, the sealing ring 8113 has a threaded protrusion inside, the pressure ring 8114 is in movable contact with the surface of the sealing ring 8113, and the pressure ring 8114 is in an "L" shape. The sealing ring 8115 is in movable contact with the surface of the pressure ring 8114, and the sealing ring 8115 is in an "L" shape. The locking ring 8116 is in movable contact with the surface of the sealing ring 8115. By using the cooperation of the sealing ring 8113, the sealing ring 8115 and the pressure ring 8114, the support ring 8111 and the support column 88 can be sealed, thereby ensuring the airtightness of the internal space of the folding airbag 810 and improving the stability of the folding airbag 810 in use.

[0059] Among them, the surfaces of telescopic tube 1 8161, telescopic tube 2 8162, and telescopic tube 3 8163 are all provided with guide grooves, and the inner walls of telescopic tube 2 8162, telescopic tube 3 8163, and telescopic tube 4 8164 are all provided with guide blocks that are adapted to the guide grooves. By using the cooperation of guide grooves and guide blocks, the movement direction of telescopic tube 1 8161, telescopic tube 2 8162, telescopic tube 3 8163, and telescopic tube 4 8164 can be guided to ensure the stability of telescopic mechanism 816 during the telescopic process.

[0060] Working principle of the invention: When using the water dispenser, place the water cup in the water receiving area of ​​the machine body 7. After placement, control the operation of the machine body 7 through the touch panel on the surface of the machine body 7. When the machine body 7 is working, the water source enters the water inlet of the machine body 7 through the municipal water pipe. When the water source enters the filter chamber 11 through the water inlet, the filter chamber 11 filters the water source. The filtered water source passes through the pressure sensor and enters the filter chamber 2 12. The filter chamber 2 12 performs secondary filtration on the water source. After the water source completes secondary filtration, the water source enters the filter chamber 3 13 for tertiary filtration. After the water source completes tertiary filtration, the water source enters the heating chamber of the machine body 7 or is directly sent to the water outlet 9 according to the user's selection. The water source sent out after being heated in the heating chamber is hot water, and the water source sent directly to the water outlet 9 is cold water.

[0061] When water passes through the pressure sensor, the water pressure pushes the support block 6 inside the assembly 5. The support block 6 is compressed by the pressure membrane 2. The pressure membrane 2, in turn, works with the main board 1 to detect the water pressure in the filter chamber 11. While the water pushes the support block 6, the water, guided by the rhomboid protrusion 61, simultaneously washes the surface of the support block 6. When the user needs to maintain the pressure sensor, the maintenance personnel remove the assembly 5 from the positioning ring 4. After the positioning ring 4 is removed, the support block 6 is no longer restricted and can be removed and replaced with a new support block 6. After replacement, the assembly 5 can be reinstalled. By setting the positioning ring 4, assembly 5, support block 6, and rhomboid protrusion 61, the contact surface of the pressure sensor is replaced by the support block 6. This solves the accuracy drift problem caused by the calcium layer and is especially suitable for direct drinking water machines with high water hardness. While ensuring the accuracy of pressure monitoring, it significantly reduces the maintenance cost and downtime loss of the equipment throughout its entire life cycle.

[0062] Additionally, when the water exits the body 7, the pressure monitored by the pressure sensor drops instantaneously. At this time, the pressure sensor, in conjunction with the body 7, controls the diaphragm pump 81 and the solenoid valve 83 to operate. The solenoid valve 83 connects the diaphragm pump 81 and the conduit 84. The diaphragm pump 81 is energized and, in conjunction with the air intake 82, pumps external air into the conduit 84. The conduit 84, in conjunction with the three-way connector 85, sends the air into the air pipe 86. The air pipe 86, in conjunction with the air intake connector 87, sends the air into the assembly tank 881. When the air enters the assembly tank 881, the air is transported... Guided by the air vent 882, the air vent 810 is inflated. During inflation, the air vent 810 pushes the sealing mechanism 811. Guided by the support column 88, the sealing mechanism 811, in conjunction with the linkage frame 812, pushes the mounting frame 813. The mounting frame 813 pushes the disc 814 and the sealing capsule 815. At the same time, the telescopic tube 8164 is pulled by the mounting frame 813, causing the telescopic mechanism 816 to gradually unfold. The sealing capsule 815 moves closer to the water cup during the movement.

[0063] When the sealing capsule 815 comes into contact with the mouth of the water cup, it covers the mouth of the water cup. At the same time, the sealing capsule 815 is deformed by the pressure of the mouth of the water cup, which causes a change in the air pressure inside itself. When the pressure sensing element 817 detects the pressure change, it controls the solenoid valve 83 and the diaphragm pump 81 to close. The solenoid valve 83 cuts off the connection between the conduit 84 and the diaphragm pump 81, so that the air pressure in the conduit 84 and the folded airbag 810 remains in a stable state. When the diaphragm pump 81 closes, water starts to flow from the outlet 9. The water source flows into the water cup under the guidance of the telescopic mechanism 816. The water source entering the water cup is blocked by the sealing capsule 815, so that the splash range is limited to the water cup.

[0064] After water discharge is completed, the machine body 7 stops discharging water. At this time, the pressure monitored by the pressure sensor in the filter compartment 11 rises instantaneously. The pressure sensor, in conjunction with the machine body 7, controls the diaphragm pump 81 and the solenoid valve 83 to work. The solenoid valve 83 reconnects the diaphragm pump 81 to the conduit 84. At this time, the diaphragm pump 81 works with the conduit 84, the three-way connector 85, the air pipe 86, the air inlet connector 87, the assembly slot 881, and the air outlet 882 to extract the gas from the folded airbag 810. The folded airbag 810 gradually folds back to its original position as the gas is extracted, and works with the sealing mechanism 811 and the linkage frame 812 to pull the mounting frame 813, the disc 814, and the sealing capsule 815 back to their original position. During the resetting process of the mounting bracket 813, disc 814, and sealing capsule 815, the user can remove the water cup and wipe the surface of the sealing capsule 815. By setting the auxiliary device 8, the water dispenser can cover the mouth of the water cup when dispensing water, so that the water cup is in a semi-enclosed space during the water dispensing process. This reduces the problem of water splashing around the water dispenser due to the distance between the water outlet 9 and the water cup, which would otherwise require the user to spend time cleaning the area around the water dispenser. While keeping the water dispensing area clean, the automatic sealing mechanism improves the user experience of the water dispenser.

[0065] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0066] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A direct drinking water machine equipped with a pressure sensor, comprising a body (7), a water outlet (9), a cover plate (10), a first filter compartment (11), a second filter compartment (12), a third filter compartment (13), and a pressure sensor, characterized in that: The water outlet (9) is integrated into the water outlet end of the body (7). The cover plate (10) is magnetically installed on the inner wall of the body (7). The first filter chamber (11) is installed on the inner wall of the body (7). The main board (1) is fixedly connected to the inner wall of the first filter chamber (11). The second filter chamber (12) is installed on the inner wall of the body (7). The third filter chamber (13) is installed on the inner wall of the body (7). An auxiliary device (8) is provided on the inner wall of the body (7). The pressure sensor includes: a main board (1), a pressure diaphragm (2), and a sealing cover (3). The pressure... The membrane (2) is encapsulated in the groove of the main board (1). The surface of the main board (1) is fixedly connected to the encapsulation cover (3). The surface of the encapsulation cover (3) is fixedly connected to the positioning ring (4). The inner wall of the positioning ring (4) is threadedly connected to the fitting (5). The inner wall of the fitting (5) is threadedly connected to the bearing block (6). The bearing block (6) is in movable contact with the surface of the pressure membrane (2). The end of the bearing block (6) away from the pressure membrane (2) is provided with a groove. The inner wall of the bearing block (6) in the groove is provided with a prismatic protrusion (61). The auxiliary device (8) includes a diaphragm pump (81), which is fixedly connected to the inner wall of the body (7). The output end of the diaphragm pump (81) is fixedly connected to a solenoid valve (83), and the output end of the solenoid valve (83) is fixedly connected to a conduit (84). The inner wall of the conduit (84) is fixedly connected to a three-way connector (85), and the inner wall of the three-way connector (85) is fixedly connected to an air pipe (86). The output end of the air pipe (86) is fixedly connected to an air inlet connector (87). The inner wall of the body (7) is fixedly connected to a support column (88). An assembly groove (881) is provided on the upper surface of the support column (88). The air inlet connector (87) is threadedly connected to the inner wall of the assembly groove (881). An air delivery hole (882) is provided on the inner wall of the assembly groove (881) of the support column (88). A fixed plate (89) is fixedly connected to the surface of the support column (88). A folding airbag (810) is fixedly connected to the lower surface of the fixed plate (89). A sealing mechanism (811) is installed on the lower surface of the folding airbag (810). A linkage frame (812) is fixedly connected to the surface of the sealing mechanism (811). A mounting frame (813) is fixedly connected to the surface of the linkage frame (812). A disc (814) is fixedly connected to the lower surface of the mounting frame (813). A sealing capsule (815) is fixedly connected to the inner wall of the disc (814). A pressure sensing element (817) is fixedly connected to the inner wall of the disc (814).

2. The direct drinking water machine equipped with a pressure sensor according to claim 1, characterized in that: The upper surface of the body (7) is provided with a square hole, and an air inlet (82) is fixedly connected to the inner wall of the square hole of the body (7). The air inlet (82) is fixedly connected to the output end of the diaphragm pump (81).

3. The direct drinking water machine equipped with a pressure sensor according to claim 1, characterized in that: The sealing mechanism (811) includes a support ring (8111), which is fixedly connected to the lower surface of the folded airbag (810). The support ring (8111) is sleeved on the surface of the support column (88). A sleeve (8112) is fixedly connected to the lower surface of the support ring (8111). A sealing ring (8113) is installed on the inner wall of the sleeve (8112). The sealing ring (8113) is sleeved on the support column (88). On the surface, a pressure ring (8114) is installed on the inner wall of the sleeve (8112), the pressure ring (8114) is sleeved on the surface of the support column (88), a sealing ring II (8115) is installed on the inner wall of the sleeve (8112), the sealing ring II (8115) is sleeved on the surface of the support column (88), and a locking ring (8116) is threadedly connected to the inner wall of the sleeve (8112), the locking ring (8116) is sleeved on the surface of the support column (88).

4. The direct drinking water machine equipped with a pressure sensor according to claim 1, characterized in that: The lower surface of the outlet (9) is provided with a telescopic mechanism (816). The telescopic mechanism (816) includes a first telescopic tube (8161), which is fixedly connected to the lower surface of the outlet (9). A second telescopic tube (8162) is slidably connected to the surface of the first telescopic tube (8161). A third telescopic tube (8163) is slidably connected to the surface of the second telescopic tube (8162). A fourth telescopic tube (8164) is slidably connected to the surface of the third telescopic tube (8163). The fourth telescopic tube (8164) is fixedly connected to the inner wall of the mounting bracket (813).

5. The direct drinking water machine equipped with a pressure sensor according to claim 1, characterized in that: The air inlet connector (87) is installed inside the fuselage (7), and the air inlet connector (87) is connected to the interior of the assembly slot (881). The air outlet (882) is located inside the folding airbag (810).

6. The direct drinking water machine equipped with a pressure sensor according to claim 1, characterized in that: The number of pressure sensing elements (817) is two, and the two pressure sensing elements (817) are distributed in an equidistant array with reference to the center of the disk (814).

7. The direct drinking water machine equipped with a pressure sensor according to claim 3, characterized in that: The sealing ring one (8113) has a threaded protrusion inside. The pressure ring (8114) is in movable contact with the surface of the sealing ring one (8113). The pressure ring (8114) is L-shaped. The sealing ring two (8115) is in movable contact with the surface of the pressure ring (8114). The sealing ring two (8115) is L-shaped. The locking ring (8116) is in movable contact with the surface of the sealing ring two (8115).

8. The direct drinking water machine equipped with a pressure sensor according to claim 4, characterized in that: The surfaces of the first telescopic tube (8161), the second telescopic tube (8162), and the third telescopic tube (8163) are all provided with guide grooves, and the inner walls of the second telescopic tube (8162), the third telescopic tube (8163), and the fourth telescopic tube (8164) are all provided with guide blocks that are adapted to the guide grooves.

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