Pressure sensor and direct drinking machine

Abstract

The invention relates to the technical field of direct drinking machines, and discloses a pressure sensor and a direct drinking machine, the pressure sensor comprises a main board, a pressure film and a packaging cover, the pressure film is packaged in a groove of the main board, the surface of the main board is fixedly connected with the packaging cover, the surface of the packaging cover is fixedly connected with a positioning ring, the inner wall of the positioning ring is in threaded connection with an assembling sleeve, and the assembling sleeve is in threaded connection with the main board. The inner wall of the assembling sleeve is in threaded connection with a bearing block, the bearing block movably abuts against the surface of the pressure film, a groove is formed in the end, away from the pressure film, of the bearing block, and a prismatic protruding block is arranged on the inner wall, located in the groove, of the bearing block. According to the pressure sensor, the positioning ring, the assembling sleeve, the bearing block and the prismatic convex block are arranged, so that the contact surface of the pressure sensor is replaced by the bearing block, the problem of precision drift caused by a calcareous layer is solved, the pressure sensor is particularly suitable for direct drinking airport scenes with high water hardness, the pressure monitoring accuracy is guaranteed, and meanwhile, the service life of the pressure sensor is prolonged. And the maintenance cost and shutdown loss of the equipment in the whole life cycle are greatly reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of direct drinking machines, in particular to a pressure sensor and a direct drinking machine. BACKGROUND

[0002] The pressure sensor is a device for detecting fluid or gas pressure and converting it into an electrical signal, which is composed of a sensitive element (such as a diaphragm, a bellows) and a conversion circuit, and realizes accurate measurement (accuracy up to 0.1% FS) through deformation or resistance change caused by pressure, and is widely used in industrial control, medical equipment and other fields.

[0003] The direct drinking machine is an equipment that purifies water sources through a multi-stage filtration system (PP cotton, activated carbon, RO membrane, etc.), removes impurities, bacteria and heavy metals, and makes the water meet the direct drinking standard. It is often equipped with heating / cooling function and intelligent control system to meet the safe drinking water needs of home, office and other scenes. Some existing direct drinking machines integrate pressure sensors in the equipment. The pressure sensor is embedded in the water system and linked with the main control chip. When the water inlet pressure is detected to be abnormal, the machine will automatically shut down to protect the filter core from damage or water leakage risk. At the same time, it can monitor the water pressure before and after the filter core in real time, and prompt to replace the filter core when the pressure difference exceeds the threshold, so as to ensure the filtration efficiency and water quality safety of the direct drinking machine.

[0004] (1) In the application of pressure sensor integrated in the filter core of direct drinking machine, the long-term filtration of impurity-containing water quality, such as hard water with calcium and magnesium ion concentration greater than or equal to 100 mg / L, will cause the formation of a 0.1-0.5 mm thick calcium scale layer on the surface of the pressure membrane. These attached impurities cover the sensing diaphragm through the dual action of physical deposition and chemical crystallization, reducing the pressure conduction efficiency by 30%-50%, directly causing the sensitivity of the sensor to attenuate. The original 0.01 MPa water pressure change can trigger signal output, but after scaling, 0.03-0.05 MPa pressure fluctuation is needed to respond, causing delay in filter core blockage warning and seriously affecting the accurate monitoring of the state of the direct drinking machine filter core. (2) At the same time, in the use scene of some direct drinking machines equipped with pressure sensors, when the installation height of the water outlet and the distance between the water outlet and the cup exceed 5 cm, the impact splashing phenomenon of water flow caused by gravity acceleration is significant. When the distance reaches 10 cm, the splashing droplets generated by the water flow impacting the bottom of the cup can cover an area with a radius of 15 cm in the water receiving area, causing an average of 0.5-1 mL of water stains to accumulate on the control panel and water receiving table of the direct drinking machine every minute. These splashing water stains not only need to be wiped off by the user after receiving the water for 10-20 seconds, but also may seep into the control panel gap to cause circuit short circuit risk, increasing the maintenance burden of the equipment. Therefore, we propose a pressure sensor and a direct drinking machine. SUMMARY

[0005] In view of the deficiencies of the prior art, the pressure sensor and the direct drinking machine solve the problem that the existing direct drinking machine installed with a pressure sensor causes a calcium scale layer with a thickness of 0.1-0.5 mm to be formed on the surface of the pressure film, the attached impurities cover the sensing diaphragm through the dual action of physical deposition and chemical crystallization, the pressure conduction efficiency is reduced by 30%-50%, and the sensitivity of the sensor is directly attenuated; meanwhile, in the use scene of the direct drinking machine installed with the pressure sensor, when the installation height of the water outlet and the distance between the water outlet and the cup exceed 5 cm, the impact splashing phenomenon of the water flow caused by the gravitational acceleration is significant, when the distance reaches 10 cm, the splashing droplets generated by the impact of the water flow on the bottom of the cup can cover the water receiving area with a radius of 15 cm, and the average water stains of 0.5-1 mL per minute are accumulated on the surface of the control panel and the water receiving table of the direct drinking machine, the splashing water stains not only need to be wiped and cleaned by the user after the water is received for 10-20 seconds, but also can seep into the gap of the control panel to cause the risk of circuit short circuit, and the problem of aggravating the equipment maintenance burden is caused.

[0006] To achieve the above object, the pressure sensor and the direct drinking machine are implemented through the following technical scheme: a pressure sensor and a direct drinking machine, comprising a main plate, a pressure film and a packaging cover, the pressure film is packaged in the groove of the main plate, the surface of the main plate is fixedly connected with the packaging cover, the surface of the packaging cover is fixedly connected with a positioning ring, the inner wall of the positioning ring is threadedly connected with a fitting sleeve, the inner wall of the fitting sleeve is threadedly connected with a bearing block, and the surface of the bearing block is movably abutted with the pressure film.

[0007] Preferably, a groove is formed in the end of the bearing block away from the pressure film, and a prismatic protrusion is arranged on the inner wall of the groove of the bearing block, the surface of the bearing block on the side in contact with the water source is arranged in a concave-convex shape by the prismatic protrusion, so that the side of the bearing block in contact with the water source can guide the water source, the surface of the bearing block is washed by the guided water source, and the adhesion of the scale is reduced by the arrangement of the prismatic protrusion, and the adhesion probability of the scale is further reduced.

[0008] Preferably, the machine body, the water outlet, the cover plate, the filter bin one, the filter bin two and the filter bin three are further included, the water outlet is integrated at the water outlet end of the machine body, the cover plate is magnetically installed on the inner wall of the machine body, the filter bin one is installed on the inner wall of the machine body through a support, the main plate is fixedly connected with the inner wall of the filter bin one, the filter bin two is installed on the inner wall of the machine body through a support, the filter bin three is installed on the inner wall of the machine body through a support, and the inner wall of the machine body is provided with an auxiliary device. The auxiliary device comprises a diaphragm pump, the diaphragm pump is fixedly connected with the inner wall of the fuselage, the output end of the diaphragm pump is fixedly connected with an electromagnetic valve through a pipeline, the output end of the electromagnetic valve is fixedly connected with a catheter, the inner wall of the catheter is fixedly connected with a tee joint, the inner wall of the tee joint is fixedly connected with a trachea, the output end of the trachea is fixedly connected with an air inlet joint, the inner wall of the fuselage is fixedly connected with a support column, the upper surface of the support column is provided with an assembly groove, the air inlet joint is threadedly connected with the inner wall of the assembly groove, and a gas inlet hole is formed in the inner wall of the assembly groove and located on the support column. The surface of the support column is fixedly connected with a fixing disc, the lower surface of the fixing disc is fixedly connected with a folding air bag, the lower surface of the folding air bag is provided with a sealing mechanism, the surface of the sealing mechanism is fixedly connected with a linkage frame, the surface of the linkage frame is fixedly connected with a mounting frame, the lower surface of the mounting frame is fixedly connected with a disc, the inner wall of the disc is fixedly connected with a sealing capsule, the inner wall of the disc is fixedly connected with a pressure sensing element, the disc and the sealing capsule are matched to seal the pressure sensing element in a specified space, when the sealing capsule contacts the cup mouth of the water cup, the water cup will press the sealing capsule, the air pressure in the sealing capsule is increased, and the diaphragm pump is controlled when the pressure sensing element detects that the air pressure is increased.

[0009] Preferably, the upper surface of the fuselage is provided with a square hole, the inner wall of the fuselage located in the square hole is fixedly connected with an air inlet row, and the output end of the diaphragm pump is fixedly connected with the air inlet row through a pipeline. The air inlet row can provide external air for the diaphragm pump, and can filter the air entering the diaphragm pump, thereby reducing the probability of impurities in the air entering the diaphragm pump.

[0010] Preferably, the sealing mechanism comprises a support ring, the support ring is fixedly connected with the lower surface of the folding air bag, the support ring is sleeved on the surface of the support column, the lower surface of the support ring is fixedly connected with a sleeve, the inner wall of the sleeve is provided with a sealing ring one, the sealing ring one is sleeved on the surface of the support column, the inner wall of the sleeve is provided with a pressing ring, the pressing ring is sleeved on the surface of the support column, the inner wall of the sleeve is provided with a sealing ring two, the sealing ring two is sleeved on the surface of the support column, and the inner wall of the sleeve is threadedly connected with a locking ring, the locking ring is sleeved on the surface of the support column. The locking ring and the sleeve are matched, the sealing ring two is pressed after the locking ring is screwed, so that the contact strength between the sealing ring two and the sealing ring one and the support column is increased, and the sealing effect of the sealing ring two and the sealing ring one is improved.

[0011] Preferably, the lower surface of the water outlet is provided with a telescopic mechanism, the telescopic mechanism comprises a telescopic pipe I, the telescopic pipe I is fixedly connected with the lower surface of the water outlet, a telescopic pipe II is slidably connected with the surface of the telescopic pipe I, a telescopic pipe III is slidably connected with the surface of the telescopic pipe II, a telescopic pipe IV is slidably connected with the surface of the telescopic pipe III, and the telescopic pipe IV is fixedly connected with the inner wall of the mounting frame. The water source of the water outlet can be guided by the telescopic pipe I, the telescopic pipe II, the telescopic pipe III and the telescopic pipe IV, so that the flow direction of the water source can be limited within a specified range when the water source is pumped out.

[0012] Preferably, the air inlet joint is installed in the interior of the fuselage, the air inlet joint is in communication with the interior of the assembly groove, and the air inlet hole is located in the interior of the folding air bag. Air can be pumped into the folding air bag through the air inlet hole, so that the folding air bag is unfolded in a specified direction after air injection and drives the sealing mechanism to move.

[0013] Preferably, the number of pressure sensing elements is two, and the two pressure sensing elements are distributed in an equidistant array with the center of the disc as a reference.

[0014] Preferably, the interior of the sealing ring I is provided with a thread-shaped convex strip, the surface of the compression ring is movably abutted with the sealing ring I, the compression ring is provided in an “L” shape, the surface of the sealing ring II is movably abutted with the compression ring, the sealing ring II is provided in an “L” shape, and the surface of the locking ring is movably abutted with the sealing ring II. The cooperation of the sealing ring I, the sealing ring II and the compression ring can seal the space between the support ring and the support column, so as to ensure the sealing performance of the interior space of the folding air bag and improve the stability of the folding air bag in the use state.

[0015] Preferably, the surfaces of the telescopic pipe I, the telescopic pipe II and the telescopic pipe III are all provided with guide grooves, and the inner walls of the telescopic pipe II, the telescopic pipe III and the telescopic pipe IV are all provided with guide blocks matched with the guide grooves. The cooperation of the guide grooves and the guide blocks can guide the moving direction of the telescopic pipe I, the telescopic pipe II, the telescopic pipe III and the telescopic pipe IV, so as to ensure the stability of the telescopic mechanism during the telescopic process.

[0016] In summary, the technical effects and advantages of the present application are as follows: 1. In the present application, the pressure conduction protection structure composed of the positioning ring, the assembly sleeve, the bearing block and the prismatic convex block is arranged, and the “isolated pressure conduction + self-cleaning” sensor protection system is constructed: the water source pressure is indirectly transmitted to the pressure film through the bearing block, the bearing block made of food-grade POM material (Shore hardness 85A) is used as a medium to completely isolate the pressure film from the water source, so as to avoid the direct contact of impurities such as calcium and magnesium ions and particulate matters with the diaphragm; the prismatic convex block is designed by fluid dynamics (included angle 60°±5°), and a turbulent flushing effect is formed when the water flows, so that the impurity removal rate on the surface of the bearing block is more than 95%, and the deposition of calcium layer is inhibited from the source. The device realizes maintenance cost optimization through a modular design, the quick release structure of the positioning ring and the assembly sleeve supports independent replacement of the bearing block, and the single maintenance cost is reduced by 75% compared with replacing the pressure sensor; the surface of the bearing block is treated with a Teflon coating to further reduce the probability of impurity adhesion, so that the pressure conduction error of the sensor is stably within ±1.5% FS for a long time, and the precision decay period is more than 3 times longer than that of the non-isolation scheme; by setting the positioning ring, the assembly sleeve, the bearing block and the prismatic protrusion, the contact surface of the pressure sensor is replaced by the bearing block, and the precision drift problem caused by the calcium layer is particularly suitable for high-hardness water quality in the direct drinking field, while ensuring the accuracy of pressure monitoring, the maintenance cost and downtime loss of the equipment throughout the life cycle are greatly reduced.

[0017] 2. By setting an auxiliary device composed of a diaphragm pump, an electromagnetic valve, a conduit, a folding air bag, a sealing mechanism and a pressure sensor, a "self-adaptive sealing-splash-proof" system during water outlet of the direct drinking machine is constructed: when the water outlet of the machine body triggers the pressure sensor to act, the diaphragm pump inflates the folding air bag through the air pipe, drives the sealing mechanism to move along the pillar guide, and makes the sealing capsule accurately fit the cup mouth. The sealing capsule is made of food-grade silicone material, which produces an elastic deformation of 1.2-1.5 mm when contacting the cup mouth, triggers the pressure sensing unit to stop the power by changing its own air pressure, forms a flexible sealing adapted to the shape of the cup mouth, and constructs a semi-closed water receiving space. The design uses the "inflation-driven-flexible sealing-pressure self-limiting" mechanism to close the gap between the water outlet and the cup mouth to more than 98%, so that the water splash range is strictly limited within the water cup; the arc contact surface of the sealing capsule is adapted to various water cups with a diameter of 50-120 mm, solving the splash adaptation problem when different specifications of containers receive water; the telescopic stroke (30-80 mm) of the folding air bag can be compatible with water cups of different heights without manual adjustment by the user; by setting the auxiliary device, the direct drinking machine can cover the cup mouth when it is receiving water, so that the water cup is in a semi-closed space during water receiving, reducing the problem that the user needs to spend a certain amount of time to clean the area around the direct drinking machine when the water outlet is far away from the water cup, and improving the user experience of the direct drinking machine through the automatic sealing mechanism while keeping the water receiving area clean. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the pressure sensor of the application; Figure 2 It is a schematic diagram of the sectional structure of the pressure sensor of the application; Figure 3 It is a schematic diagram of the sectional structure of the pressure sensor of the application; Figure 2 It is a schematic diagram of the sectional structure of the pressure sensor of the application; Figure 4The overall structure schematic diagram of the pressure sensor and direct drinking machine; Figure 5 The front view of the pressure sensor and direct drinking machine; Figure 6 The side view of the pressure sensor and direct drinking machine; Figure 7 The internal structure schematic diagram of the pressure sensor and direct drinking machine; Figure 8 The auxiliary device structure schematic diagram of the pressure sensor and direct drinking machine; Figure 7 Figure 9 The auxiliary device structure schematic diagram of the pressure sensor and direct drinking machine; Figure 10 The auxiliary device structure schematic diagram of the pressure sensor and direct drinking machine; Figure 11 The auxiliary device structure schematic diagram of the pressure sensor and direct drinking machine; Figure 10 Figure 12 The auxiliary device structure schematic diagram of the pressure sensor and direct drinking machine; Figure 13 The sealing mechanism structure schematic diagram of the pressure sensor and direct drinking machine; Figure 14 The telescopic mechanism structure schematic diagram of the pressure sensor and direct drinking machine; Figure 15 The telescopic mechanism structure schematic diagram of the pressure sensor and direct drinking machine;

[0019] In the figure: 1, main board; 2, pressure film; 3, packaging cover; 4, positioning ring; 5, assembly sleeve; 6, bearing block; 61, prismatic protrusion; 7, machine body; 8, auxiliary device; 81, diaphragm pump; 82, air inlet; 83, electromagnetic valve; 84, catheter; 85, tee joint; 86, air pipe; 87, air inlet joint; 88, support; 881, assembly groove; 882, air conveying hole; 89, fixed disc; 810, folding air bag; 811, sealing mechanism; 8111, support ring; 8112, sleeve; 8113, sealing ring one; 8114, pressing ring; 8115, sealing ring two; 8116, locking ring; 812, linkage frame; 813, mounting frame; 814, disc; 815, sealing capsule; 816, telescopic mechanism; 8161, telescopic pipe one; 8162, telescopic pipe two; 8163, telescopic pipe three; 8164, telescopic pipe four; ​​817、pressure sensing element; 9, water outlet; 10, cover plate; 11, filter bin one; 12, filter bin two; 13, filter bin three. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] Reference Figures 1-15 The pressure sensor and direct drinking machine shown in the figure include a main plate 1, a pressure film 2 and an encapsulation cover 3. The pressure film 2 is encapsulated in the groove of the main plate 1. The surface of the main plate 1 is fixedly connected with the encapsulation cover 3. The surface of the encapsulation cover 3 is fixedly connected with a positioning ring 4. The inner wall of the positioning ring 4 is threadedly connected with an assembly sleeve 5. The inner wall of the assembly sleeve 5 is threadedly connected with a bearing block 6. The bearing block 6 movably abuts against the surface of the pressure film 2.

[0022] Preferably, a groove is formed at the end of the bearing block 6 away from the pressure film 2. A prismatic protrusion 61 is arranged on the inner wall of the groove. The surface of the bearing block 6 on the side contacting the water source is arranged in a concave-convex shape by the prismatic protrusion 61. The side of the bearing block 6 contacting the water source can guide the water source. The surface of the bearing block 6 is washed by the guided water source. The setting of the prismatic protrusion 61 can reduce the adhesion of the scale and further reduce the probability of scale adhesion.

[0023] Preferably, the machine body 7, the water outlet 9, the cover plate 10, the filter bin one 11, the filter bin two 12 and the filter bin three 13 are further included. The water outlet 9 is integrated at the water outlet end of the machine body 7. The cover plate 10 is magnetically installed on the inner wall of the machine body 7. The filter bin one 11 is installed on the inner wall of the machine body 7 through a support. The main plate 1 is fixedly connected with the inner wall of the filter bin one 11. The filter bin two 12 is installed on the inner wall of the machine body 7 through a support. The filter bin three 13 is installed on the inner wall of the machine body 7 through a support. The inner wall of the machine body 7 is provided with an auxiliary device 8. The auxiliary device 8 includes a diaphragm pump 81. The diaphragm pump 81 is fixedly connected with the inner wall of the machine body 7. The output end of the diaphragm pump 81 is fixedly connected with an electromagnetic valve 83 through a pipeline. The output end of the electromagnetic valve 83 is fixedly connected with a catheter 84. The inner wall of the catheter 84 is fixedly connected with a three-way joint 85. The inner wall of the three-way joint 85 is fixedly connected with an air tube 86. The output end of the air tube 86 is fixedly connected with an air inlet joint 87. The inner wall of the machine body 7 is fixedly connected with a support column 88. The upper surface of the support column 88 is provided with an assembly groove 881. The air inlet joint 87 is threadedly connected with the inner wall of the assembly groove 881. The inner wall of the assembly groove 881 is provided with a gas conveying hole 882. The surface of the support column 88 is fixedly connected with a fixing disc 89, the lower surface of the fixing disc 89 is fixedly connected with a folding air bag 810, the lower surface of the folding air bag 810 is installed with a sealing mechanism 811, the surface of the sealing mechanism 811 is fixedly connected with a linkage frame 812, the surface of the linkage frame 812 is fixedly connected with a mounting frame 813, the lower surface of the mounting frame 813 is fixedly connected with a disc 814, the inner wall of the disc 814 is fixedly connected with a sealing capsule 815, the disc 814 and the sealing capsule 815 cooperate to enclose the pressure sensing element 817 in a specified space, and when the sealing capsule 815 contacts the cup mouth, the cup will squeeze the sealing capsule 815, and the air pressure in the sealing capsule 815 will rise, and when the pressure sensing element 817 detects the rise in air pressure, it will control the diaphragm pump 81.

[0024] The upper surface of the fuselage 7 is provided with a square hole, the inner wall of the square hole is fixedly connected with an air inlet 82, the air inlet 82 is fixedly connected with the output end of the diaphragm pump 81 through a pipeline, and the air inlet 82 can provide external air for 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.

[0025] The sealing mechanism 811 includes a support ring 8111 fixedly connected with the lower surface of the folding air bag 810, the support ring 8111 is sleeved on the surface of the support column 88, the lower surface of the support ring 8111 is fixedly connected with a sleeve 8112, the inner wall of the sleeve 8112 is installed with a sealing ring one 8113, the sealing ring one 8113 is sleeved on the surface of the support column 88, the inner wall of the sleeve 8112 is installed with a pressing ring 8114, the pressing ring 8114 is sleeved on the surface of the support column 88, the inner wall of the sleeve 8112 is installed with a sealing ring two 8115, the sealing ring two 8115 is sleeved on the surface of the support column 88, the inner wall of the sleeve 8112 is threadedly connected with a locking ring 8116, the locking ring 8116 is sleeved on the surface of the support column 88, and the locking ring 8116 cooperates with the sleeve 8112 to press the sealing ring two 8115 after tightening the locking ring 8116, thereby increasing the contact strength between the sealing ring two 8115 and the sealing ring one 8113 and the support column 88, and improving the sealing effect of the sealing ring two 8115 and the sealing ring one 8113.

[0026] The lower surface of the water outlet 9 is provided with a telescopic mechanism 816, the telescopic mechanism 816 comprises a telescopic pipe one 8161, the telescopic pipe one 8161 is fixedly connected with the lower surface of the water outlet 9, the surface of the telescopic pipe one 8161 is slidably connected with a telescopic pipe two 8162, the surface of the telescopic pipe two 8162 is slidably connected with a telescopic pipe three 8163, the surface of the telescopic pipe three 8163 is slidably connected with a telescopic pipe four 8164, the telescopic pipe four 8164 is fixedly connected with the inner wall of the mounting frame 813, by using the telescopic pipe one 8161, the telescopic pipe two 8162, the telescopic pipe three 8163 and the telescopic pipe four 8164, the water source of the water outlet 9 can be guided, so that the flow direction of the water source can be limited within the specified range when being pumped out.

[0027] The air inlet joint 87 is installed in the interior of the fuselage 7, the air inlet joint 87 is in communication with the interior of the assembly groove 881, the air inlet hole 882 is located in the interior of the folding air bag 810, and air can be pumped into the folding air bag 810 through the air inlet hole 882, so that the folding air bag 810 is unfolded in a specified direction after being injected with air, and the sealing mechanism 811 is driven to move.

[0028] The number of the pressure sensing elements 817 is two, and the two pressure sensing elements 817 are equidistantly arranged with the center of the disc 814 as a reference.

[0029] The interior of the sealing ring one 8113 is provided with a thread-shaped convex strip, the compression ring 8114 is in movable abutment with the surface of the sealing ring one 8113, the compression ring 8114 is arranged in an “L” shape, the sealing ring two 8115 is in movable abutment with the surface of the compression ring 8114, the sealing ring two 8115 is arranged in an “L” shape, and the locking ring 8116 is in movable abutment with the surface of the sealing ring two 8115, by cooperation of the sealing ring one 8113, the sealing ring two 8115 and the compression ring 8114, the space between the support ring 8111 and the support column 88 can be sealed, so as to ensure the sealing performance of the interior space of the folding air bag 810 and improve the stability of the folding air bag 810 in the use state.

[0030] The surfaces of the telescopic pipe one 8161, the telescopic pipe two 8162 and the telescopic pipe three 8163 are all provided with guide grooves, the inner walls of the telescopic pipe two 8162, the telescopic pipe three 8163 and the telescopic pipe four 8164 are all provided with guide blocks matched with the guide grooves, by cooperation of the guide grooves and the guide blocks, the moving direction of the telescopic pipe one 8161, the telescopic pipe two 8162, the telescopic pipe three 8163 and the telescopic pipe four 8164 can be guided, so as to ensure the stability of the telescopic mechanism 816 during the telescopic process.

[0031] 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. 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. 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. When the sealing capsule 815 is in contact with the cup mouth of the water cup, the sealing capsule 815 covers the cup mouth of the water cup, at the same time, the sealing capsule 815 is extruded and deformed by the cup mouth of the water cup, and the air pressure in the sealing capsule 815 changes, when the pressure sensing element 817 detects the pressure change, the pressure sensing element 817 controls the electromagnetic valve 83 and the diaphragm pump 81 to be closed, the electromagnetic valve 83 cuts off the communication between the conduit 84 and the diaphragm pump 81, so that the air pressure in the conduit 84 and the folded air bag 810 is kept in a stable state, when the diaphragm pump 81 is closed, the water outlet 9 starts to discharge water, the water source flows into the water cup under the guidance of the telescopic mechanism 816, and the water source entering the water cup is limited in the water cup under the shielding of the sealing capsule 815; After the water is discharged, the machine body 7 stops discharging water, at this time, the pressure in the filter bin 11 rises instantaneously, and the pressure sensor cooperates with the machine body 7 to control the diaphragm pump 81 and the electromagnetic valve 83 to work, the electromagnetic valve 83 reconnects the diaphragm pump 81 and the conduit 84, at this time, the diaphragm pump 81 works in cooperation with the conduit 84, the tee joint 85, the air pipe 86, the air inlet joint 87, the assembly groove 881 and the air inlet hole 882 to extract the gas in the folded air bag 810, the folded air bag 810 is gradually folded and reset when the gas is extracted, and the sealing mechanism 811 and the linkage frame 812 pull the mounting frame 813, the disc 814 and the sealing capsule 815 to reset, in the process of resetting the mounting frame 813, the disc 814 and the sealing capsule 815, the user can take out the water cup and wipe the surface of the sealing capsule 815; by setting the auxiliary device 8, the direct drinking machine can cover the cup mouth of the water cup when discharging water, so that the water cup is in a semi-closed space during water receiving, and the problem that the user needs to spend a certain amount of time to clean the direct drinking machine around due to the water spattering around the direct drinking machine because the distance between the water outlet 9 and the water cup is far is reduced, the area of water receiving is kept clean, and the user experience of the direct drinking machine is improved through the automatic sealing mechanism.

[0032] The electrical elements in the text are connected with the main controller and 220V mains, and the main controller can be a conventional known device such as a computer.

[0033] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pressure sensor comprising a main plate (1), a pressure membrane (2) and an encapsulation cover (3), characterized in that: The pressure film (2) is packaged in the recess of the main plate (1), the surface of the main plate (1) is fixedly connected with the packaging cover (3), the surface of the packaging cover (3) is fixedly connected with the positioning ring (4), the inner wall of the positioning ring (4) is threadedly connected with the assembly sleeve (5), the inner wall of the assembly sleeve (5) is threadedly connected with the bearing block (6), the surface of the bearing block (6) is movably abutted with the pressure film (2), and the end, away from the pressure film (2), of the bearing block (6) is provided with a recess, and the inner wall of the recess is provided with the prismatic protrusion (61).

2. A direct drinking machine installed with the pressure sensor of claim 1, comprising a machine body (7), a water outlet (9), a cover plate (10), a filter bin I (11), a filter bin II (12) and a filter bin III (13), characterized in that: The water outlet (9) is integrated at the water outlet end of the machine body (7), the cover plate (10) is magnetically installed on the inner wall of the machine body (7), the filter bin (11) is installed on the inner wall of the machine body (7), the main plate (1) is fixedly connected with the inner wall of the filter bin (11), the filter bin (12) is installed on the inner wall of the machine body (7), the filter bin (13) is installed on the inner wall of the machine body (7), and the inner wall of the machine body (7) is provided with the auxiliary device (8). The auxiliary device (8) comprises a diaphragm pump (81), the diaphragm pump (81) is fixedly connected with the inner wall of the machine body (7), the output end of the diaphragm pump (81) is fixedly connected with an electromagnetic valve (83), the output end of the electromagnetic valve (83) is fixedly connected with a conduit (84), the inner wall of the conduit (84) is fixedly connected with a three-way joint (85), the inner wall of the three-way joint (85) is fixedly connected with an air pipe (86), the output end of the air pipe (86) is fixedly connected with an air inlet joint (87), the inner wall of the machine body (7) is fixedly connected with a support (88), the upper surface of the support (88) is provided with an assembly groove (881), the air inlet joint (87) is threadedly connected with the inner wall of the assembly groove (881), and the inner wall of the assembly groove (881) is provided with a gas conveying hole (882). The surface of the support (88) is fixedly connected with a fixed disc (89), the lower surface of the fixed disc (89) is fixedly connected with a folding air bag (810), the lower surface of the folding air bag (810) is installed with a sealing mechanism (811), the surface of the sealing mechanism (811) is fixedly connected with a linkage frame (812), the surface of the linkage frame (812) is fixedly connected with a mounting frame (813), the lower surface of the mounting frame (813) is fixedly connected with a disc (814), the inner wall of the disc (814) is fixedly connected with a sealing capsule (815), and the inner wall of the disc (814) is fixedly connected with a pressure sensing element (817).

3. A direct drinker according to claim 2, characterized in that The upper surface of the machine body (7) is provided with a square hole, the inner wall of the machine body (7) is fixedly connected with an air inlet row (82), and the output end of the diaphragm pump (81) is fixedly connected with the air inlet row (82).

4. A direct drinking machine according to claim 2, characterised in that: The sealing mechanism (811) comprises a supporting ring (8111) fixedly connected with the lower surface of the folding air bag (810), the supporting ring (8111) is sleeved on the surface of the support column (88), the lower surface of the supporting ring (8111) is fixedly connected with a sleeve (8112), the inner wall of the sleeve (8112) is installed with a sealing ring I (8113), the sealing ring I (8113) is sleeved on the surface of the support column (88), the inner wall of the sleeve (8112) is installed with a pressing ring (8114), the pressing ring (8114) is sleeved on the surface of the support column (88), the inner wall of the sleeve (8112) is installed with a sealing ring II (8115), the sealing ring II (8115) is sleeved on the surface of the support column (88), and the inner wall of the sleeve (8112) is threadedly connected with a locking ring (8116), the locking ring (8116) is sleeved on the surface of the support column (88).

5. A direct drinking machine based on claim 2, characterized in that: The lower surface of the water outlet (9) is provided with a telescopic mechanism (816), the telescopic mechanism (816) comprises a telescopic pipe I (8161), the telescopic pipe I (8161) is fixedly connected with the lower surface of the water outlet (9), the surface of the telescopic pipe I (8161) is slidably connected with a telescopic pipe II (8162), the surface of the telescopic pipe II (8162) is slidably connected with a telescopic pipe III (8163), the surface of the telescopic pipe III (8163) is slidably connected with a telescopic pipe IV (8164), and the telescopic pipe IV (8164) is fixedly connected with the inner wall of the mounting bracket (813).

6. A direct drinking machine based on claim 2, characterized in that: The air inlet joint (87) is installed in the interior of the fuselage (7), the air inlet joint (87) is in communication with the interior of the assembly groove (881), and the air inlet hole (882) is located in the interior of the folding air bag (810).

7. A direct drinking machine based on claim 2, characterized by: The number of the pressure sensing elements (817) is two, and the two pressure sensing elements (817) are distributed in an equidistant array with the center of the disc (814) as a reference.

8. A direct drinking machine based on claim 4, characterized by: The inside of the sealing ring I (8113) is provided with a threaded protruding strip, the pressing ring (8114) is in movable abutment with the surface of the sealing ring I (8113), the pressing ring (8114) is arranged in an "L" shape, the sealing ring II (8115) is in movable abutment with the surface of the pressing ring (8114), the sealing ring II (8115) is arranged in an "L" shape, and the locking ring (8116) is in movable abutment with the surface of the sealing ring II (8115).

9. A direct drinking machine based on claim 5, characterized by: The surfaces of the telescopic pipe I (8161), the telescopic pipe II (8162) and the telescopic pipe III (8163) are all provided with guide grooves, and the inner walls of the telescopic pipe II (8162), the telescopic pipe III (8163) and the telescopic pipe IV (8164) are all provided with guide blocks matched with the guide grooves.

Images