Peristaltic pump, blood purification apparatus, and control method thereof

Abstract

This application provides a peristaltic pump, a blood purification device, and a control method thereof, relating to the field of medical device technology. It addresses the problem that existing peristaltic pumps in blood purification devices require manual observation to check the installation or removal of the pump tubing, resulting in low levels of automation. The peristaltic pump includes a housing, a pump body, an ejection mechanism, and a detection mechanism. The housing has a mounting groove for installing the pump tubing. The pump body includes a pump motor and a rotor. The rotor is connected to the pump motor and is at least partially located within the mounting groove, rotating under the drive of the pump motor. The ejection mechanism includes a drive motor and an ejector component. The output end of the drive motor is connected to the ejector component. The ejector component, driven by the drive motor, extends into the mounting groove and moves away from the bottom of the groove to eject the pump tubing. The detection mechanism is used to detect whether the pump tubing is installed on the housing.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a peristaltic pump, a blood purification device, and a control method thereof. Background Technology

[0002] A blood purification device is a device that purifies blood. It removes specific molecules from the blood by drawing it out of the body and then reintroducing the purified blood into the body to treat diseases.

[0003] Blood purification equipment typically includes a power pump for transporting blood or fluids within tubing. This power pump can be a peristaltic pump, for example, to deliver blood or fluids.

[0004] As is known, the pump tubing in a peristaltic pump needs to be disassembled and reassembled before and after use. However, existing blood purification equipment requires manual observation of whether the pump tubing is installed during use, thus completing the installation or disassembly process. This lack of automation affects operational efficiency. Summary of the Invention

[0005] This application provides a peristaltic pump, a blood purification device, and a control method thereof, which solves the problem that the peristaltic pump in existing blood purification devices requires manual observation to complete the installation or removal process of the pump tube, resulting in a low level of intelligence.

[0006] In a first aspect, embodiments of this application provide a peristaltic pump, including a housing, a pump body, an ejection mechanism, and a detection mechanism. The housing has a mounting groove for mounting a pump tube. The pump body includes a pump motor and a rotor. The rotor is connected to the pump motor and is at least partially located within the mounting groove for rotation under the drive of the pump motor. The ejection mechanism includes a drive motor and an ejector component. The output end of the drive motor is connected to the ejector component. The ejector component, driven by the drive motor, extends into the mounting groove and moves in a direction away from the bottom of the groove to eject the pump tube. The detection mechanism is used at least to detect whether a pump tube is mounted on the housing.

[0007] The peristaltic pump provided in this embodiment offers a mounting slot in the housing for installing the pump tube, facilitating its installation and fixation. The pump tube within the mounting slot can be located around the rotor. The rotor, driven by the pump, propels the liquid within the pump tube, thus transporting the liquid. During use, a detection mechanism can check whether a pump tube is installed on the housing. Subsequently, the ejection mechanism and pump body can remove or disassemble the pump tube based on the detection results, avoiding the risks associated with human error, enhancing the level of automation, and ensuring service life.

[0008] In some embodiments, a clearance hole is provided at the bottom of the mounting groove. The clearance hole penetrates the housing, and the ejector is located within the clearance hole. The detection mechanism includes a first detection device and a second detection device. The first and second detection devices are disposed on the inner wall of the clearance hole. Along a direction perpendicular to the extension of the clearance hole, the second detection device and the first detection device are spaced apart and opposite to each other, located on opposite sides of the ejector. A communicating hole is provided on the ejector. Along the arrangement direction of the first and second detection devices, the communicating hole penetrates the ejector. The first and second detection devices are used to communicate when positioned opposite each other to the communicating hole.

[0009] In some embodiments, the detection mechanism includes a third detection device and a fourth detection device. The third detection device is disposed on the peripheral wall of the mounting groove, and the fourth detection device is disposed on the peripheral wall of the rotor, for cooperating with the third detection device to detect whether a pump pipe is installed on the housing.

[0010] In some embodiments, the detection device includes a fifth detection device and a sixth detection device. The fifth detection device is disposed on the housing. The sixth detection device is disposed on the rotor and is used to cooperate with the fifth detection device to detect the position of the rotor.

[0011] Secondly, embodiments of this application provide a blood purification device, including any of the peristaltic pumps described in the first aspect.

[0012] Since the blood purification device provided in this application includes any of the peristaltic pumps in the first aspect, it can solve the same technical problems as the peristaltic pump and achieve the same technical effects, it will not be described again here.

[0013] Thirdly, embodiments of this application provide a control method for a blood purification device according to the second aspect, comprising the steps of: detecting whether a pump tube is installed on the peristaltic pump of the blood purification device; and controlling the peristaltic pump to perform a pump tube operation procedure based on whether a pump tube is installed on the peristaltic pump. The pump tube operation procedure includes a pump tube installation procedure and a pump tube removal procedure.

[0014] In some embodiments, detecting whether the peristaltic pump of the blood purification device has a pump tube installed includes: detecting whether the peristaltic pump of the blood purification device has a pump tube installed during the self-test phase of the blood purification device. Depending on whether the peristaltic pump has a pump tube installed, the process of controlling the peristaltic pump to perform a pump tube removal process includes: if the self-test phase detects that the peristaltic pump has a pump tube installed, controlling the peristaltic pump to perform a pump tube removal process.

[0015] In some embodiments, detecting whether the peristaltic pump of the blood purification device has a pump tube installed includes: after the blood purification device's self-test phase is completed and before the blood purification procedure is executed, detecting whether the peristaltic pump of the blood purification device has a pump tube installed. The process of controlling the peristaltic pump to perform pump tube operation based on whether the pump tube is installed includes: if the peristaltic pump is detected not to have a pump tube installed after the blood purification device's self-test phase is completed and before the blood purification procedure is executed, controlling the peristaltic pump to perform a pump tube installation process.

[0016] In some embodiments, detecting whether the peristaltic pump of the blood purification device has a pump tube installed includes: detecting whether the peristaltic pump of the blood purification device has a pump tube installed after the blood purification process of the blood purification device ends. The process of controlling the peristaltic pump to perform pump tube operation based on whether the pump tube is installed includes: if the peristaltic pump is detected to have a pump tube installed after the blood purification process of the blood purification device ends, controlling the peristaltic pump to perform a pump tube removal process.

[0017] In some embodiments, both the pump tube installation process and the pump tube disassembly process include: positioning the ejector mechanism of the peristaltic pump so that the ejector of the ejector mechanism is in a first preset position; and / or positioning the rotor of the peristaltic pump so that the rotor is in a second preset position.

[0018] In some embodiments, after disassembling the pump tubing, the pump tubing disassembly process further includes: resetting the ejector mechanism of the peristaltic pump to a first preset position, and / or resetting the rotor of the peristaltic pump to a second preset position. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a peristaltic pump provided in an embodiment of this application; Figure 2 This is a schematic diagram of another peristaltic pump provided in an embodiment of this application; Figure 3 A side sectional view of a peristaltic pump provided in an embodiment of this application; Figure 4 A simplified structural diagram showing the positional relationship between the ejector, the first detection device, the second detection device, and the housing; Figure 5 for Figure 4 The diagram shows a simplified structure during the process of the ejector moving in one direction. Figure 6 for Figure 4 The diagram shows a simplified structure completed when the ejector component moves in one direction. Figure 7 for Figure 4 The diagram shows a simplified structural representation of the ejector component moving in another direction. Figure 8 for Figure 4 The diagram shows a simplified structure after the ejector component moves in another direction. Figure 9 This is one of the schematic diagrams showing the status of a display screen in a blood purification device provided in an embodiment of this application; Figure 10 This is a second schematic diagram showing the status of a display screen in a blood purification device provided in an embodiment of this application; Figure 11 One of the flowcharts of a control method for a blood purification device provided in this application embodiment; Figure 12 A second schematic flowchart illustrating a control method for a blood purification device provided in an embodiment of this application; Figure 13 A third schematic flowchart illustrating a control method for a blood purification device provided in this application embodiment; Figure 14 A fourth schematic flowchart illustrating a control method for a blood purification device provided in this application embodiment; Figure 15 Fifth schematic flowchart of a control method for a blood purification device provided in this application embodiment; Figure 16 A schematic flowchart of a control method for a blood purification device provided in this application embodiment is shown in Figure 6. Figure 17 The seventh schematic flowchart of a control method for a blood purification device provided in this application embodiment; Figure 18 This is the eighth flowchart illustrating a control method for a blood purification device provided in this application embodiment; Figure 19 This is the ninth flowchart illustrating a control method for a blood purification device provided in an embodiment of this application.

[0021] Figure label: 100-Peristaltic pump; 10-Housing; 101-Mounting groove; 102-Snap-fit ​​part; 103-Allowing hole; 20-Pump body; 21-Rotor; 22-Roller; 23-Guide; 30-Ejection mechanism; 31-Drive motor; 32-Ejection part; 321-Communication hole; 40-Detection mechanism; 41-First detection device; 42-Second detection device; 43-Third detection device; 44-Fourth detection device; 45-Sixth detection device; 200-Pump pipe; 210-Snap-fit; 300-Display screen. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0024] In the following description, the terms "first," "second," etc., are used for ease of description only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed mechanical connection, a detachable mechanical connection, or an integral part; or, "connection" may be a direct connection or an indirect connection through an intermediate medium.

[0026] Furthermore, unless otherwise explicitly specified and limited, the term "electrical connection" should be interpreted broadly. For example, "electrical connection" can be a direct electrical connection, such as physical contact and electrical conduction between two components; it can also be understood as the electrical connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB), to transmit electrical signals; or, "electrical connection" can be an indirect electrical connection between two components through an intermediate medium; or, "electrical connection" can be an electrical connection between two components in a way that is airtight or non-contact, such as an electrical connection between two components using capacitive coupling to transmit electrical signals.

[0027] In this application, two components are "parallel" to each other, which can mean completely parallel or approximately parallel within a certain acceptable deviation range. Furthermore, two components are "perpendicular" to each other, which can mean completely perpendicular or approximately perpendicular within a certain acceptable deviation range. The aforementioned acceptable deviation range can be determined by the limitations of the measurement system used by those skilled in the art.

[0028] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] This application provides a blood purification device that can purify blood. The blood purification device may include a peristaltic pump for transporting blood or other liquids. The peristaltic pump ensures that the blood or liquid is not contaminated during transport.

[0030] It is understandable that the specific role of a peristaltic pump in a blood purification device can be selected according to actual needs. For example, at least one of the blood-driven pump, replacement fluid pump, or waste fluid discharge pump in a blood purification device can be a peristaltic pump.

[0031] The peristaltic pump provided in the embodiments of this application will be further described below with reference to the accompanying drawings, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a peristaltic pump 100 provided in an embodiment of this application. The peristaltic pump 100 may include a housing 10 and a pump body 20. The housing 10 has a mounting groove 101, which can be used to install a pump tube 200. In this way, during use, the mounting groove 101 can provide installation space for the pump tube 200, facilitating the installation and fixation of the pump tube 200.

[0032] The pump body 20 may include a pump motor (not shown) and a rotor 21. The rotor 21 is connected to the pump motor and is at least partially located within the mounting groove 101 for rotation driven by the pump motor. The pump pipe 200 within the mounting groove 101 may be located around the periphery of the rotor 21. The rotor 21 can push the liquid within the pump pipe 200 during the rotation driven by the pump motor, thereby achieving the delivery of the liquid within the pump pipe 200.

[0033] To facilitate the delivery of liquid within the pump pipe 200, in some embodiments, such as Figure 1 As shown, the pump body 20 may also include a roller 22. The roller 22 is rotatably connected to the peripheral wall of the rotor 21 and can be used to abut against the pump pipe 200. Thus, as the rotor 21 rotates, the position of the roller 22 also changes, altering its contact position with the pump pipe 200, thereby continuously pushing the liquid inside the pump pipe 200 to achieve liquid delivery.

[0034] Of course, in some other embodiments, the pump body 20 may not include the roller 22. In this case, a portion of the peripheral wall of the rotor 21 can directly abut against the pump pipe 200. For example, the peripheral wall of the rotor 21 may be formed with a protrusion, which can abut against the pump pipe 200. In this way, as the rotor 21 rotates, the contact position between the protrusion and the pump pipe 200 changes continuously, which can also continuously push the liquid in the pump pipe 200 to achieve liquid transportation.

[0035] To facilitate the installation and fixing of the pump pipe 200, in some embodiments, such as Figure 1 As shown, the peripheral wall of the mounting groove 101 may have a mounting notch (not shown in the figure), and a snap-fit ​​portion 102 (e.g., a slot) may be formed at the mounting notch. The end of the pump pipe 200 may have a latch 210, which can snap onto the snap-fit ​​portion 102, thereby fixing the pump pipe 200 within the mounting groove 101. It is understood that when it is necessary to disassemble the pump pipe 200, the latch 210 can separate from the snap-fit ​​portion 102 under external force, allowing the pump pipe 200 to be removed from the mounting groove 101.

[0036] Of course, in some other embodiments, the peripheral wall of the mounting groove 101 may not have the aforementioned mounting notch. In this case, the pump pipe 200 can also be installed and fixed in other ways.

[0037] based on Figure 1 The scheme shown facilitates the installation and removal of the pump pipe 200 within the mounting groove 101. In some embodiments, such as... Figure 1 As shown, the pump body 20 may also include a guide member 23. The guide member 23 is connected to the peripheral wall of the rotor 21 and is located on one side of the roller 22 along the circumference of the rotor 21. The guide member 23 can be used to abut against the pump pipe 200.

[0038] Since the guide member 23 is connected to the rotor 21, the guide member 23 will rotate along with the rotor 21 during rotation. Thus, when the pump pipe 200 needs to be disassembled, the guide member 23 can be positioned on the side of the pump pipe 200 closest to the bottom of the mounting groove 101. As the guide member 23 rotates, each position of the pump pipe 200 is sequentially pushed away from the bottom of the mounting groove 101 by the guide member 23, thereby allowing the pump pipe 200 to detach from the mounting groove 101.

[0039] Conversely, when the pump pipe 200 needs to be installed, the guide 23 can be located on the side of the pump pipe 200 away from the bottom of the mounting groove 101. In this way, as the guide 23 rotates, each position of the pump pipe 200 is pushed by the guide 23 toward the bottom of the mounting groove 101 in sequence, thereby enabling the installation of the pump pipe 200 in the mounting groove 101.

[0040] Understandably, based on Figure 1 According to the illustrated scheme, when installing or removing the pump tube 200, the buckle 210 at the end of the pump tube 200 can be installed and removed first to complete the installation or separation of the buckle 210 from the locking part 102. Next, the guide member 23 can be initially positioned at one end of the pump tube 200, and during movement, it gradually presses against the pump tube 200, moving to the other end of the pump tube 200. During this movement, the installation or removal of the entire pump tube 200 can be completed.

[0041] Of course, in some other embodiments, the pump body 20 may not include the guide member 23. In this case, a limiting portion may also be formed on the peripheral wall of the rotor 21. The function of the limiting portion can be the same as that of the guide member 23 described above. In specific applications, the process of the guide member 23 can be referred to, and will not be further explained here.

[0042] To facilitate the disassembly of the pump pipe 200, in some embodiments, such as Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram of another peristaltic pump 100 provided in an embodiment of this application. Figure 3 This is a side sectional view of a peristaltic pump 100 provided in an embodiment of this application. The peristaltic pump 100 may further include an ejection mechanism 30. The ejection mechanism 30 may include a drive motor 31 and an ejector 32. The output end of the drive motor 31 is connected to the ejector 32. The ejector 32 can be used to extend into the mounting groove 101 under the drive of the drive motor 31 and move in a direction away from the bottom of the mounting groove 101 to eject the pump tube 200.

[0043] Therefore, when installation and disassembly are required, the ejector 32 of the ejection mechanism 30 can be used to eject the pump tube 200, thereby completing the subsequent disassembly process. For example, the ejector 32 of the ejection mechanism 30 can be located at the end of the pump tube 200, and the ejector 32 can abut against the latch 210 at the end of the pump tube 200, causing the latch 210 to separate from the locking part 102. Then, the pump tube 200 can be disassembled using the guide 23. Of course, the ejector 32 can also be located in other positions to eject the pump tube 200. In this case, the pump tube 200 can be fixed in other ways, which can be designed according to the actual situation and are not further limited here.

[0044] In some embodiments, to detect whether the peristaltic pump 100 is equipped with the pump tube 200, the peristaltic pump 100 may also include a detection mechanism 40. The detection mechanism 40 is used at least to detect whether the pump tube 200 is installed on the housing 10. Therefore, during use, the detection mechanism 40 can detect whether the pump tube 200 is installed on the housing 10, and the ejection mechanism 30 and the pump body 20 can either install or remove the pump tube 200 based on the detection result, thereby avoiding the risk of human error, improving the level of intelligence, and ensuring service life.

[0045] In some embodiments, a clearance hole 103 is provided at the bottom of the mounting groove 101. The clearance hole 103 penetrates the housing 10, and the ejector 32 is located within the clearance hole 103. Thus, the ejector 32 can extend into the mounting groove 101 through the clearance hole 103, thereby ejecting the pump pipe 200 located within the mounting groove 101. In this case, the drive motor 31 can be positioned outside the mounting groove 101, allowing for better installation.

[0046] Of course, in some other embodiments, the drive motor 31 and the ejector 32 can also be directly disposed within the mounting groove 101. In this case, the ejector 32 can be directly located within the mounting groove 101 to eject the pump pipe 200.

[0047] In some embodiments, the detection mechanism 40 may include a first detection component disposed within the clearance hole 103. The first detection component may be used to detect the position of the ejector 32, and may also be used to determine whether a pump pipe 200 is installed on the housing 10 based on the position of the ejector 32.

[0048] Therefore, the position of the ejector 32 can be determined by the first detection component, and thus it can be determined whether the pump pipe 200 is installed based on the position of the ejector 32. For example, when one end of the ejector 32 is located at a position relatively far from the bottom of the mounting groove 101, it can be determined that the pump pipe 200 is not installed in the groove, and no pump pipe 200 obstructs the ejector 32.

[0049] Conversely, when a pump pipe 200 is installed in the mounting groove 101, the ejector 32 will move towards the bottom of the mounting groove 101 under the pressure of the pump pipe 200, so that one end of the ejector 32 can only be located relatively close to the bottom of the mounting groove 101, thus indicating that a pump pipe 200 is installed in the mounting groove 101.

[0050] In some embodiments, the first detection component may include a first detection device 41 and a second detection device 42. The first detection device 41 and the second detection device 42 are disposed on the inner wall of the clearance hole 103. Along a direction perpendicular to the extension of the clearance hole 103, the second detection device 42 and the first detection device 41 are spaced apart and positioned opposite each other on opposite sides of the ejector member 32. The ejector member 32 has a communicating hole 321. Along the arrangement direction of the first detection device 41 and the second detection device 42, the communicating hole 321 penetrates the ejector member 32. The first detection device 41 and the second detection device 42 are used to communicate when positioned opposite each other to the communicating hole 321.

[0051] Therefore, when the connecting hole 321 is positioned opposite to the first detection device 41 and the second detection device 42, the first detection device 41 and the second detection device 42 can communicate through the connecting hole 321, thereby determining the position of the ejector 32. Conversely, when the connecting hole 321 is offset from the first detection device 41 and the second detection device 42, the communication between the first detection device 41 and the second detection device 42 is blocked by the ejector 32, thereby determining the position of the ejector 32.

[0052] For example, such as Figure 3 As shown, when the end of the ejector 32 furthest from the mounting groove 101 is flush with the bottom of the housing 10, the connecting hole 321 can be completely opposite to the first detection device 41 and the second detection device 42. When the end of the ejector 32 furthest from the mounting groove 101 is not flush with the bottom of the housing 10, the connecting hole 321 can be partially or completely offset from the first detection device 41 and the second detection device 42.

[0053] Furthermore, it is understood that the specific orientation of the ejector 32 can be determined based on the communication between the first detection device 41 and the second detection device 42 during the movement of the ejector 32. For example, as shown... Figure 4 , Figure 5 and Figure 6 As shown, Figure 4 This is a simplified structural diagram showing the positional relationship between the ejector 32, the first detection device 41, the second detection device 42, and the housing 10. Figure 5 for Figure 4 The diagram shown is a simplified representation of the structure during the movement of the ejector 32 in one direction. Figure 6 for Figure 4 The diagram shows a simplified structure of the ejector 32 moving in one direction. During the movement of the ejector 32 from left to right, the communication between the first detection device 41 and the second detection device 42 can gradually decrease, indicating that the ejector 32 is gradually moving to the right.

[0054] Conversely, such as Figure 4 , Figure 7 and Figure 8 As shown, Figure 7 for Figure 4 The diagram shown is a simplified representation of the structure as the ejector 32 moves in another direction. Figure 8 for Figure 4 The diagram shows the structure of the ejector 32 moving in another direction. During the movement of the ejector 32 from right to left, the communication between the first detection device 41 and the second detection device 42 can gradually go from being present to being absent, which indicates that the ejector 32 is gradually moving to the left.

[0055] Of course, in other embodiments, the first detection device 41 can be disposed on the peripheral wall of the clearance hole 103, and the second detection device 42 can be disposed on the ejector 32. In this case, the second detection device 42 can move with the ejector 32, thereby changing the communication with the first detection device 41 and determining the position of the ejector 32.

[0056] It is understood that the specific types of the first detection device 41 and the second detection device 42 can be selected according to the actual situation. For example, the first detection device 41 and the second detection device 42 can be photoelectric sensors. Among them, the first detection device 41 can be a light emitter, and the second detection device 42 can be a light receiver.

[0057] Based on this, the first detection device 41 can emit light signals, and the second detection device 42 can receive light signals, forming an optical path. Different voltage values ​​can be generated depending on the amount of light received by the first detection device 41 and the second detection device 42.

[0058] The more optical signal received by the second detection device 42, the better the conductivity, and the lower the voltage between them. Conversely, the less optical signal received by the second detection device 42, the poorer the conductivity with the first detection device 41, and the higher the voltage (i.e., the higher the resistance between them). For example, when there is no optical signal transmission between the first detection device 41 and the second detection device 42, the voltage between them can be 5V.

[0059] Of course, the first detection device 41 and the second detection device 42 can also be other types of detection devices. For example, the first detection device 41 and the second detection device 42 can also be acoustic sensors or microwave sensors, and their signal transmission will also change due to the obstruction of the ejector 32. Of course, the first detection device 41 and the second detection device 42 can also be other types; this is only used as an example for illustration, as long as the function of position determination can be achieved.

[0060] Of course, the detection mechanism 40 can also detect whether the pump pipe 200 is installed in other ways. In some embodiments, the detection mechanism 40 may include a third detection device 43 and a fourth detection device 44. The third detection device 43 is disposed on the peripheral wall of the mounting groove 101, and the fourth detection device 44 is disposed on the peripheral wall of the rotor 21, for cooperating with the third detection device 43 to detect whether the pump pipe 200 is installed on the housing 10.

[0061] It is understood that the third detection device 43 and the fourth detection device 44 can transmit signals to each other. Since the third detection device 43 is located on the peripheral wall of the mounting groove 101, and the fourth detection device 44 is located on the peripheral wall of the rotor 21, when a pump pipe 200 is installed on the periphery of the rotor 21, the pump pipe 200 will block the signal transmission between the third detection device 43 and the fourth detection device 44. Conversely, when no pump pipe 200 is installed on the periphery of the rotor 21, the fourth detection device 44 can transmit signals normally. Therefore, the third detection device 43 and the fourth detection device 44 can directly detect whether a pump pipe 200 is installed in the mounting groove 101.

[0062] It is understandable that the specific types of the third detection device 43 and the fourth detection device 44 can be selected according to the actual situation, as long as they can detect whether the pump tube 200 is installed in the mounting slot 101. For example, one of the third detection device 43 and the fourth detection device 44 can be an infrared emitting sensor and the other can be an infrared receiving sensor. In this way, when the pump tube 200 is installed in the mounting slot 101, the pump tube 200 can block the light, and the presence of the pump tube 200 in the mounting slot 101 can be determined based on the reflection and reception of the light.

[0063] Of course, the third detection device 43 and the fourth detection device 44 can also be other detection devices such as acoustic sensors or microwave sensors, as long as they can achieve similar effects. This is only used as an example for illustration.

[0064] In some embodiments, the detection mechanism 40 may further include a fifth detection device (not shown) and a sixth detection device 45. The fifth detection device is disposed on the housing 10. The sixth detection device 45 is disposed on the rotor 21 and is used to cooperate with the fifth detection device to detect the position of the rotor 21.

[0065] Therefore, the position of the rotor 21 can be determined by the fifth and sixth detection devices 45, thus facilitating the placement of the rotor 21 in a predetermined position during use. For example, when installing or removing the pump pipe 200, the guide 23 on the rotor 21 can be positioned at the end of the pump pipe 200 by the fifth and sixth detection devices 45.

[0066] Similarly, the specific types of the fifth and sixth detection devices 45 can be selected according to the actual situation. For example, the fifth detection device can be a Hall sensor, and the sixth detection device 45 can be a magnet. Thus, as the rotor 21 rotates, the position of the magnet changes, causing a change in the magnetic field, which in turn causes a change in the output signal of the Hall sensor, thereby determining the position change of the rotor 21.

[0067] Alternatively, the fifth and sixth detection devices 45 can also be photoelectric sensors. In this case, by setting the fifth and sixth detection devices 45 relative to or offset from each other during the rotation of the rotor 21, the position change of the rotor 21 can also be detected. Of course, the fifth and sixth detection devices 45 can also be of other types; this is only illustrated as an example.

[0068] Furthermore, the specific locations of the fifth and sixth detection devices 45 can be designed according to actual conditions. For example, the fifth detection device can be located at the bottom of the mounting groove 101, and the sixth detection device 45 can be located on the rotor 21, on the side of the rotor 21 closest to the bottom of the mounting groove 101. This allows for better relative positioning of the fifth and sixth detection devices 45.

[0069] Alternatively, one of the fifth and sixth detection devices 45 can be located on the wall of the mounting groove 101, and the other can be located on the peripheral wall of the rotor 21. In this case, the fifth and sixth detection devices 45 can also be arranged relative to each other. It is understood that when the pump pipe 200 is installed in the mounting groove 101, the fifth and sixth detection devices 45 can be staggered along the direction perpendicular to the bottom of the mounting groove 101. This way, the pump pipe 200 will not affect the information transmission between the fifth and sixth detection devices 45, thereby ensuring the positioning function of the rotor 21.

[0070] It is understood that blood purification equipment may include a control module. Based on the above scheme, the control module can be electrically connected to the pump body 20, ejection mechanism 30, and detection mechanism 40 of the peristaltic pump 100. Therefore, during operation, the blood purification equipment can utilize the control module to control the peristaltic pump 100, enabling the detection of the installation status of the pump tube 200 and the installation or removal of the pump tube 200, thus enhancing the intelligence level of the blood purification equipment.

[0071] In addition, such as Figure 9 and Figure 10 As shown, Figure 9 This is one of the schematic diagrams showing the status of a display screen in a blood purification device provided in this application embodiment. Figure 10 This is a second schematic diagram illustrating the state of a display screen in a blood purification device according to an embodiment of this application. The blood purification device may further include a display screen 300. The display screen 300 can be used to display information and to control the blood purification device. For example, Figure 9 As shown, when the control module detects that the peristaltic pump 100 has been fitted with the pump tube 200, the status of the display screen 300 can be as follows: Figure 9 As shown. Conversely, when the control module detects that the peristaltic pump 100 has had its pump tube 200 disconnected, the status of the display screen 300 can be as follows. Figure 10 As shown.

[0072] Based on the aforementioned blood purification device, this application embodiment also provides a control method for the blood purification device, such as... Figure 11 As shown, Figure 11 This is one of the flowcharts illustrating a control method for a blood purification device provided in an embodiment of this application. The control method may include steps S100-S200.

[0073] S100: Check whether the peristaltic pump of the blood purification device is equipped with a pump tube.

[0074] For example, as described above, the blood purification device includes a control module that can be electrically connected to the pump body, ejection mechanism, and detection mechanism of the peristaltic pump. Thus, the detection mechanism (e.g., a first and second detection device, or a third and fourth detection device) can detect whether the peristaltic pump is equipped with a pump tube and provide the detection information to the control module, which can then perform subsequent operations based on the detection results.

[0075] S200: Controls the peristaltic pump to perform pump tubing operation procedures depending on whether pump tubing is installed. The pump tubing operation procedures include pump tubing installation and disassembly procedures.

[0076] Therefore, after receiving the relevant information, the control module can control the peristaltic pump to perform the pump tube installation or disassembly process using the pump body and ejection mechanism. For example, such as... Figure 2 As shown, the ejector of the ejector mechanism can work with the guide in the pump body to disassemble and install the pump tube. The specific installation or disassembly process can be referred to the description of disassembly and installation in the peristaltic pump above, and will not be described here.

[0077] Based on the above steps S100-S200, when using the blood purification equipment, the control module of the blood purification equipment can detect whether the peristaltic pump is equipped with a pump tube, and then execute the pump tube installation process or the pump tube disassembly process according to the installation status of the peristaltic pump's pump tube, thereby realizing the automation and intelligence of pump tube installation and disassembly and improving the user experience.

[0078] In some embodiments, such as Figure 12 As shown, Figure 12 The second schematic flowchart of a control method for a blood purification device provided in this application embodiment includes step S110, which detects whether the peristaltic pump of the blood purification device is equipped with a pump tube.

[0079] S110: During the self-test phase of the blood purification device's startup, check whether the peristaltic pump of the blood purification device is equipped with a pump tube.

[0080] like Figure 12 As shown, depending on whether the peristaltic pump is equipped with a pump tube, the process of controlling the peristaltic pump to perform pump tube operation includes step S210.

[0081] S210: If the peristaltic pump is found to have a pump tube installed during the self-test phase, control the peristaltic pump to proceed with the pump tube disassembly process.

[0082] Therefore, after the blood purification device is powered on, the self-test phase can check whether the peristaltic pump has the pump tubing installed. If the peristaltic pump is detected to have the pump tubing installed, it means that the pump tubing was not removed after the last use of the blood purification device. In this case, the peristaltic pump can be controlled to perform the pump tubing removal process to remove the pump tubing, thereby preventing the blood purification device from being used directly without replacing the pump tubing.

[0083] Conversely, if the self-test detects that the peristaltic pump tubing is not installed, the other startup self-test items of the blood purification equipment can then be performed. Based on this, the control module can detect that the peristaltic pump tubing was removed after the last use, and there is no issue of the tubing not being removed.

[0084] In some embodiments, such as Figure 13 As shown, Figure 13 The third schematic flowchart of a control method for a blood purification device provided in this application embodiment includes step S120, which detects whether the peristaltic pump of the blood purification device is equipped with a pump tube.

[0085] S120: Completed during the self-test phase of the blood purification device. Before executing the blood purification procedure, check whether the peristaltic pump of the blood purification device is equipped with a pump tube.

[0086] like Figure 13 As shown, depending on whether the peristaltic pump is equipped with a pump tube, the process of controlling the peristaltic pump to perform pump tube operation includes step S220.

[0087] S220: If the self-test of the blood purification device is completed, before executing the blood purification procedure, if the peristaltic pump is found to be without a pump tube, control the peristaltic pump to perform the pump tube installation process.

[0088] Therefore, before performing a blood purification procedure, it can be checked whether the peristaltic pump has the pump tubing installed. If the peristaltic pump is found to be without the pump tubing, there is a problem of missing tubing. Then, the peristaltic pump can be used to install the pump tubing, thus avoiding the situation where the blood purification procedure is performed directly without the pump tubing installed.

[0089] Conversely, if the blood purification device completes its self-test phase and checks that the peristaltic pump tubing has been installed before executing the blood purification procedure, then the blood purification procedure of the blood purification device can be executed.

[0090] In some embodiments, such as Figure 14 As shown, Figure 14 The fourth flowchart of a control method for a blood purification device provided in this application embodiment includes step S130, which detects whether the peristaltic pump of the blood purification device is equipped with a pump tube.

[0091] S130: After the blood purification process is completed by the blood purification equipment, check whether the peristaltic pump of the blood purification device is equipped with a pump tube.

[0092] Depending on whether the peristaltic pump is equipped with a pump tube, the process of controlling the peristaltic pump to operate the pump tube includes step S230.

[0093] S230: If the peristaltic pump is found to have a pump tube installed after the blood purification equipment has finished the blood purification process, control the peristaltic pump to perform the pump tube disassembly process.

[0094] Therefore, after the blood purification process is completed by the blood purification equipment, it can be checked whether the peristaltic pump has the pump tubing installed. If the pump tubing is found to be installed, it indicates that the tubing may have been forgotten to be removed. The peristaltic pump can then be used to perform the tubing removal process, thus avoiding the problem of missing the removal of the pump tubing.

[0095] Conversely, if the peristaltic pump tubing is detected to have been disconnected after the blood purification process has ended, it indicates that the tubing has been disconnected and the blood purification equipment can proceed with other shutdown and power-off procedures.

[0096] In some embodiments, such as Figure 15 As shown, Figure 15 The fifth flowchart of a control method for a blood purification device provided in this application embodiment includes step 201 in both the pump tube installation process and the pump tube disassembly process.

[0097] S201: Position the ejector mechanism of the peristaltic pump so that the ejector component of the ejector mechanism is in a first preset position. Therefore, before installing or removing the pump tubing, the position of the ejector component can be adjusted to facilitate subsequent installation or removal of the pump tubing using the ejector component.

[0098] For example, the first preset position can be a position where there will be no mutual interference with the pump pipe when it is installed in the mounting slot. For example, such as Figure 3 As shown, the first preset position can be Figure 3 The end of the ejector shown is flush with the bottom of the housing at the point where it is furthest from the mounting groove.

[0099] Furthermore, for example, when positioning the ejector of the ejector mechanism, the position of the ejector can be determined by utilizing the change in the communication between the first detection device and the second detection device, thereby completing the positioning of the ejector.

[0100] Furthermore, for example, the positioning process of the ejector can be performed by bidirectional movement. That is, the first detection device and the second detection device can determine that the ejector is in a first preset position. After the ejector moves from the first preset position to different directions, the signals from the first detection device and the second detection device can determine that it is not in the first preset position. This can show that the movement of the ejector is faultless and complete the detection of whether the bidirectional movement of the ejector causes a fault.

[0101] In some embodiments, such as Figure 15 As shown, both the pump pipe installation process and the pump pipe disassembly process may include step 202.

[0102] S202: Position the rotor of the peristaltic pump to a second preset position. This allows the rotor to be pre-positioned before installing or removing the pump tubing, facilitating subsequent installation or removal of the tubing using the rotor.

[0103] For example, the second preset position can be a position that facilitates the installation or removal of the pump pipe by the rotor using unidirectional rotation. For instance, the second preset position can be a position where the guide on the rotor is located near the end of the pump pipe. Furthermore, for example, when positioning the rotor, the position of the rotor can be determined by the communication between the fifth and sixth detection devices, thereby completing the positioning of the rotor.

[0104] Similarly, for example, the rotor positioning process can be performed using bidirectional motion. That is, the fifth and sixth detection devices can determine that the rotor is in the second preset position. After the rotor rotates from the second preset position in different directions, the signal changes of the fifth and sixth detection devices can determine that it is no longer in the second preset position. This can demonstrate that the rotor is fault-free in both directions and complete the detection of whether the bidirectional rotation of the rotor causes a fault.

[0105] It is known that the pump pipe installation process may also include step S203.

[0106] S203: Install the pump pipe. For example, after the rotor and ejector device are positioned, the installation of the pump pipe can begin. Specifically, step S203 may include steps S2031-S2032.

[0107] S2031: Connect the pump pipe clip to the snap-fit ​​part.

[0108] S2032: Rotate the rotor to gradually squeeze the pump tube towards the bottom of the mounting slot using the guide components on the rotor.

[0109] Thus, by using steps S2031 and S2032, the pump pipe can be installed using the ejector mechanism and guide.

[0110] Correspondingly, the pump tube disassembly process may also include step S204.

[0111] S204: Disassemble the pump tubing. Similarly, after positioning the rotor and ejector, the installation of the pump tubing can begin. For example, step S204 may specifically include steps S2041-S2042.

[0112] For example, step S204 may specifically include steps S2041-S2042.

[0113] S2041: The ejector of the ejector mechanism separates the clip and the locking part of the pump pipe.

[0114] S2042: Rotate the rotor to gradually squeeze the pump tube away from the bottom of the mounting slot using the guide components on the rotor.

[0115] Thus, by using steps S2041 and S2042, the pump pipe can be installed using the ejector mechanism and guide.

[0116] In some embodiments, such as Figure 16 As shown, Figure 16The sixth schematic flowchart of a control method for a blood purification device provided in this application embodiment shows that after the pump tube is disassembled, the pump tube disassembly process may further include S205.

[0117] S205: Reset the ejector mechanism of the peristaltic pump so that the ejector part of the ejector mechanism is in the first preset position.

[0118] Therefore, after the pump pipe is disassembled, the position of the ejector component of the ejector mechanism can be readjusted, facilitating the next installation or disassembly of the pump pipe using the rotor. Similarly, the reset of the ejector component of the ejector mechanism can also be achieved by monitoring the communication changes between the first and second detection devices.

[0119] In some embodiments, such as Figure 16 As shown, after the pump tube is disassembled, the pump tube disassembly process may also include S206.

[0120] S206: Reset the rotor of the peristaltic pump to the second preset position.

[0121] Therefore, after the pump tube is disassembled, the rotor can be readjusted, facilitating the next installation or disassembly of the pump tube using the rotor. Similarly, the rotor's reset can be achieved by determining its position through communication between the fifth and sixth detection devices.

[0122] In some embodiments, the control method may further include step S300.

[0123] S300: Detects whether a malfunction occurs during the installation or removal of the peristaltic pump tubing. Therefore, step S300 ensures that a malfunction in the peristaltic pump can be detected, preventing continued operation and potential equipment damage. For example, during the installation or removal of the peristaltic pump tubing, the control module can use the peristaltic pump's detection mechanism to check for malfunctions, facilitating timely maintenance by personnel.

[0124] Specifically, step S300 may include step S301.

[0125] S301: Detect whether the positioning of the ejector mechanism is successful. Therefore, by detecting whether the ejector mechanism is successfully positioned, it can be confirmed whether there is a fault in the ejector mechanism. For example, the success of the ejector mechanism's positioning can be determined based on the communication between the first and second detection devices. Specifically, when the ejector mechanism fails to position itself (i.e., the ejector component does not reach the first preset position), the control module can record the fault name and the corresponding fault type.

[0126] Step S300 may also include step S302.

[0127] S302: Detect whether the peristaltic pump rotor is successfully positioned. Therefore, by detecting whether the peristaltic pump rotor is successfully positioned, it can be confirmed whether there is a fault in the pump motor and rotor. For example, whether the peristaltic pump rotor is successfully positioned can be determined based on the communication between the fifth and sixth detection devices. If the peristaltic pump rotor positioning is unsuccessful (i.e., the rotor does not reach the second preset position), it indicates that the peristaltic pump may be blocked and cannot continue operating. At this time, the control module can stop the peristaltic pump and issue a fault alarm on the display screen.

[0128] Understandably, if the control module records a fault at step S301, it can be displayed on the screen to trigger an alarm, showing multiple fault names and their corresponding types.

[0129] Step S300 may also include step S303.

[0130] S303: Detect whether the pump tubing installation was successful. Therefore, by detecting whether the pump tubing was successfully installed, it is easy to confirm whether the peristaltic pump has malfunctioned, thus facilitating confirmation of whether subsequent operations can proceed. For example, successful installation can be determined through communication between the third and fourth detection devices. If the pump tubing installation fails, it indicates that the peristaltic pump is not equipped with the tubing, and the blood purification equipment cannot proceed with subsequent operations. In this case, the control module can stop the peristaltic pump and issue a fault alarm on the display screen.

[0131] S304: Detect whether the ejector mechanism reset was successful. Similarly, by detecting whether the ejector mechanism reset was successful, it can be confirmed whether there is a fault in the ejector mechanism. For example, whether the ejector mechanism reset was successful can also be determined based on the communication between the first detection device and the second detection device. Specifically, when the ejector mechanism fails to position itself (i.e., the ejector component does not reach the first preset position), the control module can record the fault name and the corresponding fault type.

[0132] S305: Detect whether the peristaltic pump rotor reset was successful. Similarly, by detecting whether the peristaltic pump rotor reset was successful, it can be confirmed whether there is a fault in the pump motor and rotor of the peristaltic pump. For example, whether the peristaltic pump rotor reset was successful can be determined based on the communication between the fifth and sixth detection devices. If the peristaltic pump rotor reset was unsuccessful (i.e., the rotor did not reach the second preset position), it indicates that the peristaltic pump may be blocked and cannot continue to operate. At this time, the control module can control the peristaltic pump to stop and issue a fault alarm on the display screen.

[0133] S306: Detect whether the pump tubing was successfully disassembled. Similarly, detecting whether the pump tubing was successfully disassembled helps confirm whether the peristaltic pump has malfunctioned, thus facilitating confirmation of whether subsequent operations can proceed. For example, whether the pump tubing was successfully disassembled can also be determined through communication between the third and fourth detection devices. If the pump tubing disassembly fails, it indicates that the peristaltic pump tubing was not disassembled, and the blood purification equipment cannot proceed with subsequent operations. In this case, the control module can stop the peristaltic pump and issue a fault alarm on the display screen.

[0134] Based on the above steps, in practical applications, the blood purification equipment performs the following operations on the peristaltic pump during the self-test phase after startup: Figure 17 As shown, Figure 17 This is the seventh flowchart illustrating a control method for a blood purification device provided in this application embodiment.

[0135] Similarly, before the blood purification process begins and the self-test is completed, the blood purification equipment performs the following operations on the peristaltic pump: Figure 18 As shown, Figure 18 This is the eighth flowchart illustrating a control method for a blood purification device provided in this application embodiment.

[0136] Similarly, after the blood purification process is completed, the blood purification equipment performs the following operations on the peristaltic pump: Figure 19 As shown, Figure 19 This is the ninth flowchart illustrating a control method for a blood purification device provided in an embodiment of this application.

[0137] Among them, the above Figure 17 , Figure 18 as well as Figure 19 The specific process can be found in the flowchart; further details will not be provided here. Furthermore, it is understandable that... Figure 17 , Figure 18 as well as Figure 19 The order of the steps is for illustrative purposes only; the order of some steps may be changed.

[0138] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to implement any of the control methods for the blood purification device described above. For detailed explanations of related content, please refer to the relevant content regarding the waste liquid control method for the aforementioned blood purification device; further details will not be repeated here.

[0139] The computer-readable storage medium can be an internal storage unit of the aforementioned blood purification device, such as a hard drive or memory. Alternatively, it can be an external storage device, such as an external hard drive, smart memory card, secure digital card, flash memory card, etc.

[0140] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A peristaltic pump, characterized in that, include: The housing has a mounting groove for mounting a pump pipe. The pump body includes a pump motor and a rotor; the rotor is connected to the pump motor, and the rotor is at least partially located in the mounting groove for rotating under the drive of the pump motor; An ejection mechanism includes a drive motor and an ejector component; the output end of the drive motor is connected to the ejector component; the ejector component, driven by the drive motor, extends into the mounting groove and moves in a direction away from the bottom of the mounting groove to eject the pump pipe; and, The testing mechanism is used to detect whether the pump pipe is installed on the housing.

2. The peristaltic pump according to claim 1, characterized in that, The bottom of the mounting groove is provided with a clearance hole; the clearance hole penetrates the housing; the ejector is located inside the clearance hole; The testing institutions include: A first detection device is disposed on the inner wall of the clearance hole; and, The second detection device is disposed on the inner wall of the clearance hole along the extension direction perpendicular to the clearance hole. The second detection device and the first detection device are disposed at intervals opposite to each other and located on opposite sides of the ejector. The ejector has a connecting hole; the connecting hole passes through the ejector along the arrangement direction of the first detection device and the second detection device; the first detection device and the second detection device are used to communicate when they are arranged opposite to the connecting hole.

3. The peristaltic pump according to claim 1, characterized in that, The testing institutions include: The third detection device is disposed on the peripheral wall of the mounting groove; A fourth detection device is disposed on the peripheral wall of the rotor and is used in conjunction with the third detection device to detect whether the pump pipe is installed on the housing.

4. The peristaltic pump according to claim 1, characterized in that, The testing institutions include: A fifth detection device is disposed on the housing; and, A sixth detection device is disposed on the rotor and is used in conjunction with the fifth detection device to detect the position of the rotor.

5. A blood purification device, characterized in that, The peristaltic pump included in any one of claims 1-4.

6. A control method for the blood purification device according to claim 5, characterized in that, include: Check whether the peristaltic pump of the blood purification device is equipped with a pump tube; Depending on whether the peristaltic pump is equipped with a pump tube, the peristaltic pump is controlled to perform the pump tube operation procedure. The pump pipe operation process includes a pump pipe installation process and a pump pipe disassembly process.

7. The control method for the blood purification device according to claim 6, characterized in that, Detecting whether the peristaltic pump of the blood purification device is equipped with a pump tube includes: During the self-test phase of the blood purification device, it is checked whether the peristaltic pump of the blood purification device is equipped with a pump tube. Depending on whether the peristaltic pump is equipped with a pump tube, the process of controlling the peristaltic pump to operate with the pump tube includes: If the self-test phase detects that the peristaltic pump has a pump tube installed, the peristaltic pump is controlled to perform the pump tube disassembly process.

8. The control method for the blood purification device according to claim 6, characterized in that, Detecting whether the peristaltic pump of the blood purification device is equipped with a pump tube includes: Before executing the blood purification procedure, after the self-test phase of the blood purification device is completed, it is checked whether the peristaltic pump of the blood purification device is equipped with a pump tube. Depending on whether the peristaltic pump is equipped with a pump tube, the process of controlling the peristaltic pump to operate with the pump tube includes: If the self-test phase of the blood purification device is completed, and the peristaltic pump is found to be without a pump tube before the blood purification procedure is executed, the peristaltic pump is controlled to perform the pump tube installation process.

9. The control method for the blood purification device according to claim 6, characterized in that, Detecting whether the peristaltic pump of the blood purification device is equipped with a pump tube includes: After the blood purification device finishes the blood purification process, check whether the peristaltic pump of the blood purification device is equipped with a pump tube; Depending on whether the peristaltic pump is equipped with a pump tube, the process of controlling the peristaltic pump to operate with the pump tube includes: If the peristaltic pump is found to have a pump tube installed after the blood purification process is completed by the blood purification device, the peristaltic pump is controlled to perform a pump tube disassembly process.

10. The control method for the blood purification device according to claim 6, characterized in that, Both the pump pipe installation process and the pump pipe disassembly process include: Position the ejector mechanism of the peristaltic pump so that the ejector component of the ejector mechanism is in a first preset position; and / or, The rotor of the peristaltic pump is positioned so that it is in a second preset position.

11. The control method for the blood purification device according to claim 10, characterized in that, After the pump tubing is disassembled, the pump tubing disassembly process also includes: The ejector mechanism of the peristaltic pump is reset so that the ejector component of the ejector mechanism is in a first preset position; and / or, The rotor of the peristaltic pump is reset so that it is in a second preset position.

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