Integrated peristaltic pump with built-in sensor

Abstract

The invention is suitable for the technical field of peristaltic pumps, and provides an integrated peristaltic pump with a built-in sensor, the integrated peristaltic pump comprises a pump body, a water inlet joint and a water outlet joint, the water inlet joint and the water outlet joint are arranged on the pump body, a liquid detection device is integrated on the water inlet joint or the water outlet joint, and the liquid detection device comprises a shell made of a light-transmitting material and a detection element. A containing cavity and a liquid inlet channel are arranged in the shell, the containing cavity and the liquid inlet channel are arranged in a separated mode, and a reflecting face is arranged between the containing cavity and the liquid inlet channel. The liquid detection device is integrated on the water inlet connector or the water outlet connector, the total reflection principle is utilized, whether liquid exists in the liquid inlet channel or not can be accurately detected in real time, the detection mode is high in response speed, the liquid flowing state can be fed back in time, and the detection accuracy is improved. Abnormal conditions such as liquid cutoff and leakage possibly occurring in the working process of the peristaltic pump can be found in time, and stable operation of the system is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of peristaltic pump technology, and particularly relates to an integrated peristaltic pump with a built-in sensor. Background Technology

[0002] In many industrial and scientific research fields, integrated peristaltic pumps are widely used for the precise delivery of liquids. For example, in the biopharmaceutical industry for cell culture medium delivery, in the chemical industry for chemical reagent addition, and in the food industry for raw material preparation, integrated peristaltic pumps play a key role due to their advantages such as high delivery accuracy and low liquid contamination.

[0003] However, a pressing problem exists in the current use of peristaltic pumps: the difficulty in accurately and in real-time detecting the flow status of the liquid during pump operation. Traditional detection methods often rely on complex external detection equipment, such as additional flow meters and level sensors installed on the delivery pipeline. These external devices not only increase the complexity and cost of the entire system but also require additional installation space, making the equipment layout cumbersome. Moreover, some external detection devices require downtime operation during installation and maintenance, severely impacting production efficiency.

[0004] Furthermore, some detection methods that rely on the optical properties of liquids (such as color and turbidity) suffer significant performance degradation when dealing with liquids of varying colors and transparency. This leads to inaccurate results and an inability to reliably determine whether there are abnormalities such as flow interruptions or leaks, ultimately compromising the stable operation of the system. To address these issues, designing an integrated peristaltic pump with a built-in sensor is essential. Summary of the Invention

[0005] This invention provides an integrated peristaltic pump with a built-in sensor to solve the above-mentioned problems in the prior art.

[0006] The present invention is implemented as follows: an integrated peristaltic pump with built-in sensors includes a pump body, an inlet connector and an outlet connector disposed on the pump body, the inlet connector and the outlet connector being spaced apart, the inlet connector being connected to the inlet port of the pump body, the outlet connector being connected to the drain port of the pump body, and a liquid detection device being integrated on the inlet connector or the outlet connector.

[0007] The liquid detection device includes a housing made of light-transmitting material and a detection element, and also includes a receiving cavity and a liquid inlet channel disposed inside the housing. The receiving cavity and the liquid inlet channel are separated, and a reflective surface is disposed between the receiving cavity and the liquid inlet channel.

[0008] The detection element is disposed within the receiving cavity, and the detection element includes a light emitter and a light receiver; the light emitter is used to emit incident light rays to the reflecting surface, and the incident angle of the light emitter is greater than the critical angle; the light receiver is located on the reflected light rays corresponding to the incident light rays, and is used to generate a signal after receiving the light rays; the presence or absence of liquid in the liquid inlet channel is detected by the principle of total internal reflection occurring at the reflecting surface.

[0009] Preferably, the reflective surface is part of the inner wall of the housing and protrudes toward the receiving cavity. When there is no liquid in the liquid inlet channel, the incident light undergoes total internal reflection at the reflective surface and is received by the light receiver. When there is liquid in the liquid inlet channel, the total internal reflection condition at the reflective surface is disrupted, and some or all of the incident light is refracted into the liquid, causing a change in the light signal received by the light receiver.

[0010] Preferably, the detection element is an infrared diode that integrates light emission and light reception functions.

[0011] Preferably, the reflecting surface is inclined relative to the direction of the incident light.

[0012] Preferably, a drive mechanism and a hose are provided in the inner cavity of the upper end of the pump body. The drive mechanism cooperates with the inner wall of the pump body to continuously squeeze the hose. The drive mechanism includes multiple pressure rods rotatably mounted in the pump body. The multiple pressure rods are distributed in a circumferential array. The hose is installed outside the multiple pressure rods, and the multiple pressure rods cooperate with the inner wall of the pump body to squeeze the hose. A central shaft is rotatably mounted in the pump body. A central wheel is fixedly mounted on the upper end of the central shaft. Driven wheels are fixedly mounted on the lower ends of the pressure rods. The central wheel meshes with the multiple driven wheels.

[0013] Preferably, the pump body has a chamber at its lower end, the lower end of the central shaft extends into the chamber, and the drive mechanism further includes a power component for driving the central shaft to rotate, the power component being located within the chamber.

[0014] Preferably, the power assembly includes a servo motor fixedly mounted on the pump body, a spline sleeve fixedly mounted on the output shaft end of the servo motor, a spline shaft splinedly connected to the spline sleeve, a gear fixedly mounted on the upper end of the spline shaft, the lower end of the central shaft being configured to flare outwards, a gear ring fixedly mounted on the inner side of the lower end of the central shaft, the gear ring meshing with the gear, a connecting piece rotatably mounted on the spline shaft, an electric telescopic rod fixedly mounted in the chamber, and the output end of the electric telescopic rod being fixedly connected to the connecting piece.

[0015] Preferably, a heat dissipation channel is provided inside the central shaft, the heat dissipation channel passes through the central shaft, multiple through holes are provided on the gear, multiple axial flow blades arranged in a circumferential array are fixedly installed on the spline shaft, the axial flow blades are located below the gear, an air inlet groove is fixedly installed at the lower end of the pump body, the chamber is connected to the outside through the air inlet groove, a breathable container is fixedly installed inside the air inlet groove, and the breathable container is filled with a filter layer.

[0016] Preferably, the breathable container is further filled with a water-absorbing medium located on the side of the filter layer.

[0017] Preferably, an annular cavity is provided on the central shaft, and a plurality of evenly distributed liquid permeation holes are provided on the contact surface between the central shaft and the central wheel. The liquid permeation holes penetrate the central wheel and are connected to the upper end of the annular cavity. An annular liquid reservoir is provided in the cavity and is fixed on the pump body. Both the liquid reservoir and the central shaft are provided with communication ports, and the liquid reservoir and the annular cavity are connected through the communication ports.

[0018] A pressure plug is slidably installed inside the liquid reservoir. A screw is threaded through and connected to the pressure plug. The screw is rotatably mounted on the pump body. A linkage shaft is rotatably installed inside the chamber. Two meshing bevel gears are installed on the opposite end of the linkage shaft and the screw. The linkage shaft is driven by a pulley assembly.

[0019] Compared with related technologies, the integrated peristaltic pump with built-in sensor provided by the present invention has the following beneficial effects:

[0020] By integrating a liquid detection device into the inlet or outlet connector, and utilizing the principle of total internal reflection, the presence or absence of liquid in the inlet channel can be detected in real time and with high accuracy. This detection method has a fast response speed and can promptly provide feedback on the liquid flow status, helping to detect abnormalities such as liquid interruption or leakage that may occur during the operation of the peristaltic pump, thus ensuring the stable operation of the system.

[0021] This method utilizes the principle of total internal reflection for detection, unaffected by the physical properties of the liquid, such as color and transparency. As long as the refractive index of the liquid differs from that of the transparent material casing, the conditions for total internal reflection are broken, allowing the detection element to sense changes in the light signal and thus determine the liquid's state. Compared to some methods that rely on the optical properties of the liquid (such as color and turbidity), this method offers higher reliability and versatility.

[0022] Integrating the liquid detection device into the inlet or outlet connector eliminates the need for additional complex external detection equipment and wiring, making the entire integrated peristaltic pump more compact, saving installation space, reducing equipment costs, and facilitating equipment installation, maintenance, and upgrades. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a side view of the present invention;

[0025] Figure 3 This is a front view of the present invention;

[0026] Figure 4 This is an enlarged structural schematic diagram of the liquid detection device of the present invention;

[0027] Figure 5 This is a schematic diagram of the liquid detection device of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure inside the upper cavity of the pump body according to the present invention;

[0029] Figure 7 This is an enlarged structural diagram of the central wheel and multiple driven wheels of the present invention;

[0030] Figure 8 This is a schematic diagram of the internal structure of the cavity in this invention;

[0031] Figure 9 This is an enlarged cross-sectional view of a portion of the structure at the air intake slot in this invention;

[0032] Figure 10 This is a cross-sectional view of the cavity in this invention;

[0033] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle.

[0034] In the diagram: 1. Pump body; 2. Inlet connector; 3. Outlet connector; 4. Liquid detection device; 5. Housing; 6. Hospital; 7. Pressure rod; 8. Central shaft; 9. Central wheel; 10. Driven wheel; 11. Chamber; 12. Servo motor; 13. Spline sleeve; 14. Spline shaft; 15. Gear; 16. Gear ring; 17. Connecting piece; 18. Electric telescopic rod; 19. Heat dissipation channel; 20. Perforation; 21. Shaft 101. Flow vane; 22. Air inlet slot; 23. Breathable container; 24. Filter layer; 25. Water absorption medium; 26. Annular cavity; 27. Liquid permeation hole; 28. Liquid reservoir; 29. ​​Connecting port; 30. Pressure plug; 31. Screw; 32. Linkage shaft; 33. Bevel gear; 34. Pulley assembly; 101. Receiving cavity; 102. Liquid inlet channel; 103. Reflective surface; 104. Light emitter; 105. Light receiver. Detailed Implementation

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] A preferred embodiment of the integrated peristaltic pump with built-in sensor provided by the present invention is, for example... Figures 1 to 11 As shown:

[0038] An integrated peristaltic pump with built-in sensors includes a pump body 1, an inlet connector 2 and an outlet connector 3 disposed on the pump body 1, the inlet connector 2 and the outlet connector 3 are spaced apart, the inlet connector 2 is connected to the inlet port of the pump body 1, the outlet connector 3 is connected to the drain port of the pump body 1, and a liquid detection device 4 is integrated on the inlet connector 2 or the outlet connector 3.

[0039] The liquid detection device 4 includes a housing 5 made of light-transmitting material and a detection element. It also includes a receiving cavity 101 and a liquid inlet channel 102 disposed inside the housing 5. The receiving cavity 101 and the liquid inlet channel 102 are separated, and a reflective surface 103 is disposed between the receiving cavity and the liquid inlet channel.

[0040] The detection element is disposed in the receiving cavity 101. The detection element includes a light emitter 104 and a light receiver 105. The light emitter 104 is used to emit incident light rays to the reflecting surface 103. The incident angle of the light emitter 104 is greater than the critical angle. The light receiver 105 is located on the reflected light rays corresponding to the incident light rays and is used to generate a signal after receiving the light rays. The presence or absence of liquid in the liquid inlet channel 102 is detected by the principle of total internal reflection occurring at the reflecting surface 103.

[0041] The reflective surface 103 is part of the inner wall of the housing 5 and protrudes towards the receiving cavity 101. When there is no liquid in the liquid inlet channel 102, the incident light undergoes total internal reflection at the reflective surface 103 and is received by the light receiver 105. When there is liquid in the liquid inlet channel 102, the total internal reflection condition at the reflective surface 103 is disrupted, and some or all of the incident light is refracted into the liquid, causing a change in the light signal received by the light receiver 105. The detection element is an infrared diode integrating light emission and light reception functions. The reflective surface is tilted relative to the direction of the incident light.

[0042] Detection process when there is no liquid: The detection element uses an infrared diode that integrates light emission and light reception functions. The light emitter 104 emits incident light towards the reflective surface 103 set inside the housing 5, and the incident angle is greater than the critical angle. Since the reflective surface 103 is part of the inner wall of the housing 5 and protrudes towards the receiving cavity 101, when there is no liquid in the liquid inlet channel 102, the incident light undergoes total internal reflection at the reflective surface 103. The reflected light propagates along the direction of the reflected light corresponding to the incident light and is received by the light receiver 105. At this time, the light receiver 105 receives a stable light signal.

[0043] Detection process when there is liquid: When there is liquid in the liquid inlet channel 102, because the refractive index of the liquid is different from that of the shell 5 made of light-transmitting material, the total internal reflection condition at the reflective surface is destroyed, and part or all of the incident light rays are refracted into the liquid, causing changes in the intensity and quantity of the light signal received by the light receiver 105.

[0044] Detection result determination: By monitoring the changes in the light signal received by the light receiver 105, the presence or absence of liquid in the liquid inlet channel 102 can be determined based on the principle of total internal reflection, thereby realizing real-time detection of the liquid flow state during the operation of the integrated peristaltic pump body 1.

[0045] In a further preferred embodiment of the present invention:

[0046] A drive mechanism and a hose 6 are provided in the inner cavity of the upper end of the pump body 1. The drive mechanism works with the inner wall of the pump body 1 to continuously squeeze the hose 6. The drive mechanism includes multiple pressure rods 7 rotatably installed inside the pump body 1. The multiple pressure rods 7 are distributed in a circumferential array. The hose 6 is installed outside the multiple pressure rods 7 and the multiple pressure rods 7 work with the inner wall of the pump body 1 to squeeze the hose 6. A central shaft 8 is rotatably installed inside the pump body 1. A central wheel 9 is fixedly installed at the upper end of the central shaft 8. A driven wheel 10 is fixedly installed at the lower end of each pressure rod 7. The central wheel 9 meshes with the multiple driven wheels 10.

[0047] The pump body 1 has a chamber 11 at its lower end, and the lower end of the central shaft 8 extends into the chamber 11. The drive mechanism also includes a power component for driving the central shaft 8 to rotate, and the power component is located in the chamber 11.

[0048] The power assembly includes a servo motor 12 fixedly mounted on the pump body 1, a spline sleeve 13 fixedly mounted on the output shaft end of the servo motor 12, a spline shaft 14 splinedly connected to the spline sleeve 13, a gear 15 fixedly mounted on the upper end of the spline shaft 14, a central shaft 8 with an outwardly flared lower end, a gear ring 16 fixedly mounted on the inner side of the lower end of the central shaft 8, the gear ring 16 meshing with the gear 15, a connecting piece 17 rotatably mounted on the spline shaft 14, an electric telescopic rod 18 fixedly mounted inside the chamber 11, and the output end of the electric telescopic rod 18 fixedly connected to the connecting piece 17.

[0049] The servo motor 12 in the power assembly starts, and its output shaft drives the spline sleeve 13 to rotate. Since the spline shaft 14 and the spline sleeve 13 are connected by a spline, the spline shaft 14 will rotate synchronously with the spline sleeve 13. The gear 15 fixed at the upper end of the spline shaft 14 rotates accordingly, and the gear 15 meshes with the gear ring 16 fixed on the inner side of the lower end of the central shaft 8, thereby transmitting power to the central shaft 8, causing the central shaft 8 to rotate inside the pump body 1. The central wheel 9 fixed at the upper end of the central shaft 8 also rotates with the central shaft 8. The central wheel 9 meshes with the driven wheels 10 fixed at the lower ends of multiple pressure rods 7 arranged in a circumferential array, thereby driving the multiple pressure rods 7 to rotate synchronously. During the rotation of the multiple pressure rods 7, they work together with the inner wall of the pump body 1 to continuously squeeze the hoses 6 installed on their outer sides. With the circumferential movement of the pressure rods 7, different parts of the hoses 6 are squeezed in sequence, so that the liquid in the hoses 6 is gradually pushed, realizing the pumping function of the peristaltic pump.

[0050] The pump features a central shaft 8 with a heat dissipation channel 19 that runs through it. Multiple through holes 20 are located on the gear 15. A series of axial flow blades 21 arranged in a circular array are fixedly mounted on the splined shaft 14, positioned below the gear 15. An air inlet groove 22 is fixedly mounted at the lower end of the pump body 1, connecting the chamber 11 to the outside environment. A permeable container 23 is fixedly mounted within the air inlet groove 22, filled with a filter layer 24. The permeable container 23 is also filled with a water-absorbing medium 25 located to the side of the filter layer 24.

[0051] The electric telescopic rod 18 extends and retracts, and its output end drives the connecting piece 17 to move. Since the connecting piece 17 is rotatably mounted on the splined shaft 14, it will drive the splined shaft 14 to move axially on the splined sleeve 13. When the gear 15 separates from the gear ring 16, the peristaltic pump performs rapid heat dissipation. The heat dissipation channel 19 opened in the central shaft 8 runs through the central shaft 8. When the central shaft 8 rotates, the air in the heat dissipation channel 19 flows relatively. At the same time, the multiple perforations 20 opened on the gear 15 and the multiple axial flow blades 21 fixedly mounted on the splined shaft 14 in a circumferential array are located below the gear 15. When the splined shaft 14 rotates, the axial flow blades 21 rotate and agitate the air, causing the air to enter the chamber 11 from the air inlet slot 22 at the lower end of the pump body 1. After passing through the perforations 20 of the gear 15 and the heat dissipation channel 19 of the central shaft 8, the air forms a circulating flow, accelerating the heat dissipation of the internal structure of the peristaltic pump.

[0052] When outside air enters the chamber 11 through the air inlet 22, it first passes through the filter layer 24 in the air vent 23 fixedly installed inside the air inlet 22. The filter layer 24 can filter out dust, particles, and other impurities in the air, preventing these impurities from entering the chamber 11 and affecting the normal operation of the drive mechanism, thus ensuring the cleanliness of the equipment's interior. The water-absorbing medium 25 can absorb moisture from the air, drying the air entering the chamber 11. This prevents humid air from entering the chamber 11 and causing problems such as rusting or corrosion of internal components or short circuits in electrical components, further improving the reliability and stability of the equipment.

[0053] In a further preferred embodiment of the present invention:

[0054] An annular cavity 26 is formed on the central shaft 8. Several evenly distributed liquid-permeable holes 27 are formed on the contact surface between the central shaft 8 and the central wheel 9. The liquid-permeable holes 27 penetrate the central wheel 9 and communicate with the upper end of the annular cavity 26. An annular liquid reservoir 28 is provided inside the chamber 11. The liquid reservoir 28 is fixed to the pump body 1. Both the liquid reservoir 28 and the central shaft 8 have communication ports 29, and the liquid reservoir 28 and the annular cavity 26 are connected through the communication ports 29. The liquid reservoir 28 contains lubricating grease.

[0055] A pressure plug 30 is slidably installed inside the reservoir 28. A screw 31 is threaded through and connected to the pressure plug 30. The screw 31 is rotatably mounted on the pump body 1. A linkage shaft 32 is rotatably installed inside the chamber 11. Two meshing bevel gears 33 are installed at the opposite end of the linkage shaft 32 and the screw 31. The linkage shaft 32 is driven by a pulley assembly 34 to the central shaft 8. Through the above design, lubricating grease can be continuously pressurized and injected into the central wheel 9. The lubricating grease on the surface of the central wheel 9 then adheres to multiple driven wheels 10.

[0056] The reservoir 28 contains lubricating grease, providing a lubricant reserve for the entire lubrication system. In the initial state, the pressure plug 30 is located at a certain position inside the reservoir 28, in contact with the lubricating grease. At this time, the lubricating grease is in a relatively static storage state, waiting to be pressurized and delivered.

[0057] The central shaft 8 is driven to rotate in the aforementioned manner. The central shaft 8 and the linkage shaft 32 are connected by a belt pulley assembly 34. When the central shaft 8 rotates, it transmits power to the linkage shaft 32, causing the linkage shaft 32 to rotate synchronously. Two meshing bevel gears 33 are installed on the opposite end of the linkage shaft 32 and the screw 31. When the linkage shaft 32 rotates, the transmission direction is changed through these two meshing bevel gears 33, transmitting power to the screw 31, causing the screw 31 to rotate on the pump body 1.

[0058] When the screw 31 rotates, the pressure plug 30 is slidably installed in the reservoir 28. Under the action of the thread, the pressure plug 30 will move along the axial direction of the screw 31, squeezing the lubricating grease in the reservoir 28 and increasing the pressure of the lubricating grease.

[0059] Both the reservoir 28 and the central shaft 8 have connecting ports 29. Under the pressure of the pressure plug 30, the pressurized lubricating grease enters the annular cavity 26 on the central shaft 8 from the reservoir 28 through the connecting ports 29. The contact surfaces of the central shaft 8 and the central wheel 9 are provided with several evenly distributed liquid-permeable holes 27, which penetrate the central wheel 9 and connect to the upper end of the annular cavity 26. The lubricating grease entering the annular cavity 26 flows out through the liquid-permeable holes 27 under pressure and reaches the surface of the central wheel 9. During the rotation of the central wheel 9, the lubricating grease on its surface adheres to the multiple driven wheels 10 meshing with it, thus providing continuous lubrication to the meshing parts of the central wheel 9 and the driven wheels 10, reducing wear, lowering operating noise, extending the service life of the drive mechanism, and ensuring the stable operation of the integrated peristaltic pump.

[0060] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0061] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. An integrated peristaltic pump with a built-in sensor, characterized in that, The pump includes a pump body (1), an inlet connector (2) and an outlet connector (3) disposed on the pump body (1), the inlet connector (2) and the outlet connector (3) being spaced apart, the inlet connector (2) being connected to the inlet port of the pump body (1), and the outlet connector (3) being connected to the drain port of the pump body (1). The pump body is characterized in that a liquid detection device (4) is integrated on the inlet connector (2) or the outlet connector (3). The liquid detection device (4) includes a housing (5) made of light-transmitting material and a detection element. It also includes a receiving cavity (101) and a liquid inlet channel (102) disposed in the housing (5). The receiving cavity (101) and the liquid inlet channel (102) are separated, and a reflective surface (103) is provided between the receiving cavity and the liquid inlet channel. The detection element is disposed in the receiving cavity (101), and the detection element includes a light emitter (104) and a light receiver (105); the light emitter (104) is used to emit incident light to the reflecting surface (103), and the incident angle of the light emitter (104) is greater than the critical angle; the light receiver (105) is located on the reflected light corresponding to the incident light and is used to generate a signal after receiving the light; the presence or absence of liquid in the liquid inlet channel (102) is detected by the principle of total internal reflection occurring at the reflecting surface (103).

2. The integrated peristaltic pump with built-in sensor as described in claim 1, characterized in that, The reflective surface (103) is part of the inner wall of the housing (5) and protrudes toward the receiving cavity (101). When there is no liquid in the liquid inlet channel (102), the incident light undergoes total internal reflection at the reflective surface (103) and is received by the light receiver (105). When there is liquid in the liquid inlet channel (102), the total internal reflection condition at the reflective surface (103) is destroyed, and part or all of the incident light is refracted into the liquid, causing the light signal received by the light receiver (105) to change.

3. The integrated peristaltic pump with built-in sensor as described in claim 2, characterized in that, The detection element is an infrared diode that integrates light emission and light reception functions.

4. The integrated peristaltic pump with built-in sensor as described in claim 3, characterized in that, The reflecting surface is tilted relative to the direction of the incident light.

5. The integrated peristaltic pump with a built-in sensor as described in claim 1, characterized in that, The pump body (1) is provided with a drive mechanism and a hose (6) in the upper inner cavity. The drive mechanism works with the inner wall of the pump body (1) to continuously squeeze the hose (6). The drive mechanism includes multiple pressure rods (7) rotatably installed inside the pump body (1). The multiple pressure rods (7) are arranged in a circumferential array. The hose (6) is installed outside the multiple pressure rods (7) and the multiple pressure rods (7) work with the inner wall of the pump body (1) to squeeze the hose (6). A central shaft (8) is rotatably installed inside the pump body (1). A central wheel (9) is fixedly installed at the upper end of the central shaft (8). A driven wheel (10) is fixedly installed at the lower end of each pressure rod (7). The central wheel (9) meshes with the multiple driven wheels (10).

6. The integrated peristaltic pump with built-in sensor as described in claim 5, characterized in that, The pump body (1) has a chamber (11) at its lower end, and the lower end of the central shaft (8) extends into the chamber (11). The drive mechanism also includes a power component for driving the central shaft (8) to rotate, and the power component is located in the chamber (11).

7. The integrated peristaltic pump with a built-in sensor as described in claim 6, characterized in that, The power assembly includes a servo motor (12) fixedly mounted on the pump body (1), a spline sleeve (13) fixedly mounted on the output shaft end of the servo motor (12), a spline shaft (14) splinedly connected to the spline sleeve (13), a gear (15) fixedly mounted on the upper end of the spline shaft (14), the lower end of the central shaft (8) is configured to be outwardly flared, a gear ring (16) fixedly mounted on the inner side of the lower end of the central shaft (8), the gear ring (16) meshing with the gear (15), a connecting piece (17) rotatably mounted on the spline shaft (14), an electric telescopic rod (18) fixedly mounted in the chamber (11), and the output end of the electric telescopic rod (18) fixedly connected to the connecting piece (17).

8. The integrated peristaltic pump with a built-in sensor as described in claim 7, characterized in that, A heat dissipation channel (19) is provided inside the central shaft (8), and the heat dissipation channel (19) passes through the central shaft (8). Multiple through holes (20) are provided on the gear (15). Multiple axial flow blades (21) arranged in a circular array are fixedly installed on the spline shaft (14). The axial flow blades (21) are located below the gear (15). An air inlet groove (22) is fixedly installed at the lower end of the pump body (1). The chamber (11) is connected to the outside through the air inlet groove (22). A breathable container (23) is fixedly installed inside the air inlet groove (22). The breathable container (23) is filled with a filter layer (24).

9. The integrated peristaltic pump with a built-in sensor as described in claim 8, characterized in that, The breathable container (23) is also filled with a water-absorbing medium (25) located on the side of the filter layer (24).

10. The integrated peristaltic pump with a built-in sensor as described in claim 9, characterized in that, An annular cavity (26) is provided on the central shaft (8). Several evenly distributed liquid permeation holes (27) are provided on the contact surface between the central shaft (8) and the central wheel (9). The liquid permeation holes (27) penetrate the central wheel (9) and are connected to the upper end of the annular cavity (26). An annular liquid reservoir (28) is provided in the chamber (11). The liquid reservoir (28) is fixed on the pump body (1). Both the liquid reservoir (28) and the central shaft (8) are provided with a communication port (29). The liquid reservoir (28) and the annular cavity (26) are connected through the communication port (29). A pressure plug (30) is slidably installed inside the reservoir (28). A screw (31) is threaded through and connected to the pressure plug (30). The screw (31) is rotatably installed on the pump body (1). A linkage shaft (32) is rotatably installed inside the chamber (11). Two meshing bevel gears (33) are installed at the opposite end of the linkage shaft (32) and the screw (31). The linkage shaft (32) is driven to the central shaft (8) by a pulley assembly (34).

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