Perfusion and suction system

Abstract

The utility model provides a perfusion and suction system which comprises a main control unit and a motor driver connected with the main control unit, and the motor driver is connected to a power supply unit through a power supply line; the motor driver is connected to the motor and used for controlling the rotating speed of the motor. Wherein the perfusion and suction system further comprises a first switch unit and a monitoring unit, and the first switch unit is arranged on the power supply circuit; the monitoring unit is connected with the first switch unit so as to control the first switch unit to be switched on or switched off; wherein the main control unit and the monitoring unit are different elements.

Description

Technical Field

[0001] This disclosure relates to an infusion suction system. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In the diagnosis and treatment of kidney stones, perfusion aspiration systems are used. These systems can be combined with endoscopes and lithotripsy equipment to infuse and / or aspirate fluid into the patient's body.

[0004] Generally, perfusion and suction systems include three core functions: perfusion fluid, aspiration fluid, and pressure and temperature measurement. Among these, the perfusion function, because it increases the pressure within the patient's cavity, has very strict safety requirements. For example, during the use of a perfusion and suction system, if the motor stalls or fails to stop, it can often have a significant impact on the patient.

[0005] Existing technology CN116549749A discloses an intelligent pressure-controlled infusion aspiration system and its automatic flow control method. This infusion system uses a pressure sensor and a flow sensor to aspirate, and controls a first motor based on data detected by the pressure sensor and / or flow sensor. Overall, this existing technology controls the motor through software, which cannot solve the problems of motor stalling or the motor failing to stop.

[0006] In summary, the safety protection of existing infusion motors is generally achieved through the motor's own driver or controller software. However, when the motor driver or controller malfunctions, sufficient safety of the infusion suction system cannot be guaranteed. Utility Model Content

[0007] This disclosure provides an infusion suction system.

[0008] According to one aspect of this disclosure, an infusion aspiration system is provided, the infusion aspiration system including a main control unit and a motor driver connected to the main control unit, wherein the motor driver is connected to a power supply unit via a power supply line; the motor driver is connected to a motor for controlling the motor's rotational speed; the infusion aspiration system further includes:

[0009] A first switching unit, wherein the first switching unit is disposed on the power supply line; and

[0010] A monitoring unit is connected to a first switch unit to control the first switch unit to be turned on or off; wherein the main control unit and the monitoring unit are different components.

[0011] According to at least one embodiment of the infusion and suction system of this disclosure, the main control unit is further configured to send a control signal to the motor driver, the control signal including the desired speed of the motor; the main control unit is communicatively connected to the monitoring unit, and the main control unit also synchronously provides the control signal to the monitoring unit, the monitoring unit controlling the first switching unit to be turned on or off according to the desired speed of the motor and the actual speed of the motor after executing the control signal.

[0012] According to at least one embodiment of the infusion and suction system of this disclosure, the monitoring unit compares the desired speed of the motor with the actual speed of the motor after the control signal is executed. When the absolute value of the difference between the desired speed of the motor and the actual speed of the motor after the control signal is executed is greater than a preset threshold, the monitoring unit controls the first switch unit to open.

[0013] According to at least one embodiment of the infusion and aspiration system of this disclosure, when the monitoring unit does not receive a control signal sent by the main control unit, the monitoring unit controls the first switch unit to disconnect.

[0014] According to at least one embodiment of the infusion and aspiration system of this disclosure, the main control unit is communicatively connected to the monitoring unit, and when the communication connection between the monitoring unit and the main control unit is disconnected, the monitoring unit controls the first switch unit to disconnect.

[0015] According to at least one embodiment of the infusion and aspiration system of this disclosure, the main control unit is further configured to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the monitoring unit does not receive the handshake signal transmitted by the main control unit, the monitoring unit controls the first switch unit to disconnect.

[0016] The perfusion suction system according to at least one embodiment of the present disclosure further includes:

[0017] The second switch unit is connected in series with the first switch unit, and the second switch unit is connected to the main control unit, which is used to control the second switch unit to be turned on or off.

[0018] According to at least one embodiment of the perfusion aspiration system of this disclosure, the main control unit is further configured to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the main control unit does not receive the response signal transmitted by the monitoring unit, the main control unit controls the second switch unit to disconnect.

[0019] The perfusion suction system according to at least one embodiment of the present disclosure further includes:

[0020] A current fuse, which is connected in series with the first switching unit.

[0021] According to at least one embodiment of the injection suction system of this disclosure, the current fuse includes a resettable fuse.

[0022] Beneficial effects: In this utility model, the communication between the monitoring unit and the main control unit is normal. When the monitoring unit does not receive the control signal sent by the main control unit, the monitoring unit controls the first switch unit to open and causes the motor to stop rotating, thereby preventing the motor from generating excessive speed and ensuring the safety of the infusion suction system. Attached Figure Description

[0023] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0024] Figure 1 This is a structural block diagram of an infusion suction system according to one embodiment of the present disclosure.

[0025] The specific labels in the attached figures are as follows:

[0026] 100 Infusion Suction System

[0027] 110 Main Control Unit

[0028] 120 motor driver

[0029] 130 motor

[0030] 140 power supply units

[0031] 150 First Switching Unit

[0032] 160 monitoring units

[0033] 170 Second Switching Unit

[0034] 180°C current fuse. Detailed Implementation

[0035] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0036] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0038] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0039] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0040] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0041] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0042] Figure 1 This is a structural block diagram of an infusion suction system 100 according to one embodiment of the present disclosure.

[0043] like Figure 1 As shown, the infusion and suction system 100 of this disclosure may include components such as a main control unit 110, a motor driver 120, and a motor 130.

[0044] The main control unit 110 of this disclosure can be an industrial computer, a microcontroller, a PLC, or a DSP, etc. The main control unit 110 is communicatively connected to the motor driver 120, meaning it can communicate with the motor driver 120, thereby sending control signals to the motor driver 120. In one specific embodiment, the control signals of this disclosure include at least the time value of the next moment and the desired speed that the motor 130 should reach at the next moment.

[0045] The motor driver 120 controls the motor 130 to operate in speed mode. After receiving the control signal from the main control unit 110, if the current speed of the motor 130 is the same as the expected speed at the next moment, the motor driver 120 can maintain the current speed of the motor 130. If the current speed of the motor 130 is different from the expected speed at the next moment, the motor driver 120 controls the motor 130 and makes the speed of the motor 130 change smoothly from the current speed (smoothly accelerating or smoothly decelerating) to the expected speed.

[0046] The motor 130 disclosed herein can be a stepper motor. Of course, this disclosure does not limit the type of the motor 130. Accordingly, the motor driver 120 can also be a stepper motor driver, in which case the stepper motor driver can control the speed of the motor 130 by providing PWM signals with different duty cycles to the stepper motor.

[0047] Additionally, the motor 130 is used to connect to the infusion pump, enabling the pump to generate liquid at a preset pressure. When the motor 130 operates at different speeds, the infusion pump can provide liquid at different pressures and / or flow rates. Those skilled in the art will understand that the infusion pump can be connected to an endoscope via an infusion tubing, and liquid can be infused into the patient's body through the endoscope.

[0048] The motor driver 120 of this disclosure is connected to the power supply unit 140 via a power supply line; thereby the power supply unit 140 can provide electrical energy to the motor driver 120, and correspondingly, the motor driver 120 can provide electrical energy to the motor 130, causing the motor 130 to rotate at a predetermined speed.

[0049] See again Figure 1 The infusion suction system 100 of this disclosure also includes a first switching unit 150 and a monitoring unit 160. The first switching unit 150 can be an electronic switch, specifically, it can be a thyristor, transistor, field-effect transistor, silicon controlled rectifier, relay, etc. The first switching unit 150 is located in the power supply line, so that when the first switching unit 150 is turned on, the power supply unit 140 can provide power to the motor driver 120; when the first switching unit 150 is turned off, the power supply unit 140 cannot provide power to the motor driver 120.

[0050] The monitoring unit 160 disclosed herein can be a control device such as an industrial control computer, a microcontroller, a PLC, or a DSP; moreover, the monitoring unit 160 of this disclosure is formed as an independent component. That is to say, the main control unit 110 and the monitoring unit 160 of this disclosure are not the same component.

[0051] The monitoring unit 160 is connected to the first switch unit 150 to control the first switch unit 150 to be turned on or off. Specifically, the monitoring unit 160 of this disclosure can control the first switch unit 150 to be turned on or off by providing voltage signals (high level or low level) of different voltage values ​​to the first switch unit 150.

[0052] The motor 130 disclosed herein may include a speed sensor capable of obtaining the rotational speed of the motor 130 in real time. In one specific embodiment, the speed sensor may be an encoder or the like, to obtain the rotational speed of the motor 130 with high accuracy.

[0053] The monitoring unit 160 of this disclosure is connected to the motor 130 to obtain the actual speed of the motor 130; the monitoring unit 160 controls the first switch unit 150 to be turned on or off according to the actual speed of the motor 130.

[0054] Specifically, the main control unit 110 of this disclosure is communicatively connected to the monitoring unit 160, thereby enabling the main control unit 110 to synchronously provide the control signal to the monitoring unit 160. In other words, the main control unit 110 of this disclosure can simultaneously provide the control signal to both the monitoring unit 160 and the motor driver 120. Alternatively, the main control unit 110 may first provide the control information to the motor driver 120, and then provide the drive signal to the monitoring unit 160.

[0055] The monitoring unit 160 controls the first switch unit 150 to turn on or off based on the expected speed of the motor 130 and the actual speed of the motor 130 after the control signal is executed.

[0056] More specifically, the monitoring unit 160 compares the expected speed of the motor 130 with the actual speed of the motor 130 after executing the control signal and obtains the comparison result; wherein, when the comparison result is that the expected speed of the motor 130 does not match the actual speed of the motor 130 after executing the control signal, the monitoring unit 160 controls the first switch unit 150 to disconnect.

[0057] The mismatch between the expected speed of the motor and the actual speed of the motor 130 after executing the control signal means that the absolute value of the difference between the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal is greater than a preset threshold. This preset threshold can be a percentage of the expected speed of the motor 130, for example, 1% of the expected speed of the motor 130. Of course, the preset threshold of this disclosure can also be set to other values ​​based on safety considerations of the infusion and suction system.

[0058] In other words, when the absolute value of the difference between the expected speed of motor 130 and the actual speed of motor 130 after executing the control signal is greater than a preset threshold, the comparison result is set as a mismatch between the expected speed of motor 130 and the actual speed of motor 130 after executing the control signal, and accordingly, the monitoring unit 160 controls the first switch unit 150 to disconnect.

[0059] In another scenario, since the monitoring unit 160 is communicatively connected to the main control unit 110, the main control unit 110 also sends a handshake signal to the monitoring unit 160. The monitoring unit 160 then transmits a response signal to the main control unit 110 based on this handshake signal. When both the handshake signal and the response signal are correctly sent and received, it indicates that the communication between the main control unit 110 and the monitoring unit 160 is normal. Conversely, if the handshake signal or the response signal is not correctly sent or received, it indicates that the communication between the main control unit 110 and the monitoring unit 160 is abnormal. In this case, the power supply unit 140 cannot provide power to the motor driver 120 to prevent the motor 130 from rotating at an inappropriate speed, which could cause unreasonable fluid pressure or flow rate in the infusion suction system.

[0060] In one scenario, when the communication between the monitoring unit 160 and the main control unit 110 is normal, but the monitoring unit 160 does not receive the control signal sent by the main control unit 110, the monitoring unit 160 controls the first switch unit 150 to disconnect and causes the motor 130 to stop rotating, thereby preventing the motor 130 from generating excessive speed and ensuring the safety of the infusion suction system.

[0061] In another scenario, when the communication connection between the monitoring unit 160 and the main control unit 110 is lost, the monitoring unit 160 controls the first switch unit 150 to disconnect. Specifically, when the monitoring unit 160 does not receive a handshake signal transmitted by the main control unit 110, the monitoring unit 160 controls the first switch unit 150 to disconnect, causing the motor 130 to stop rotating, thus ensuring the safety of the infusion suction system.

[0062] In this disclosure, the infusion suction system 100 also includes a second switching unit 170, which can be an electronic switch, specifically a thyristor, transistor, field-effect transistor, silicon controlled rectifier, relay, etc. The second switching unit 170 is connected in series with the first switching unit 150 on the power supply line. Thus, when the second switching unit 170 is turned on, the power supply unit 140 can provide power to the motor driver 120 (at this time, the first switching unit 150 also needs to be turned on); when the second switching unit 170 is turned off, the power supply unit 140 cannot provide power to the motor driver 120.

[0063] The second switching unit 170 is connected to the main control unit 110, which controls the second switching unit 170 to be turned on or off. Specifically, the main control unit 110 of this disclosure can control the second switching unit 170 to be turned on or off by providing voltage signals (high level or low level) of different voltage values ​​to the second switching unit 170.

[0064] In this disclosure, when the main control unit 110 does not receive a response signal transmitted by the monitoring unit 160, the main control unit 110 controls the second switch unit 170 to disconnect. That is to say, once the main control unit 110 loses the data reported by the monitoring unit 160, the main control unit 110 can consider the monitoring unit 160 to have failed, and the main control unit 110 will disconnect the second switch unit 170 to stop the motor 130, so as to ensure the safety of the infusion suction system.

[0065] See again Figure 1 The infusion and suction system 100 disclosed herein may further include a current fuse 180, which is connected in series with the first switching unit 150. Specifically, the current fuse 180 includes a resettable fuse. Thus, when the motor 130 stalls, the current consumed by the motor 130 will be much greater than under normal operating conditions. In this case, the resettable fuse will automatically blow, disconnecting the power supply to the motor 130 and stopping the motor 130, thereby ensuring the safety of the infusion and suction system.

[0066] In other words, when the current supplied to the motor driver 120 is greater than or equal to a preset value, the current fuse 180 trips; wherein, when the current fuse 180 trips, the power supply unit 140 cannot supply power to the motor driver 120. In a specific embodiment, the preset value can be approximately 1.1 times the rated current of the motor 130, so that when the motor 130 stalls, the current fuse 180 can trip as quickly as possible to stop the motor and ensure the safety of the injection suction process.

[0067] In other words, the power supply line (i.e., the motor power circuit) of this disclosure is equipped with a first switch unit 150, a second switch unit 170, and a current fuse 180 connected in series, which adds an additional triple protection to the injection suction system of this disclosure on the basis of conventional protection; that is, on the basis of conventional software protection, the first switch unit 150 and the second switch unit 170 add two additional software protections, which solves the problem of the motor not being able to stop and improves the safety performance of the injection suction system; at the same time, the injection suction system of this disclosure also adds electronic component-level hardware protection (current fuse 180), avoiding the risk caused by the failure of all software protections in extreme cases, solving the problem of motor stalling and improving the safety performance of the injection suction system.

[0068] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. An infusion aspiration system, the infusion aspiration system comprising a main control unit and a motor driver connected to the main control unit, wherein, The motor driver is connected to the power supply unit via a power supply line; The motor driver is connected to the motor and is used to control the motor speed; the infusion suction system further includes: A first switching unit, wherein the first switching unit is disposed on the power supply line; and A monitoring unit is connected to a first switch unit to control the first switch unit to be turned on or off; wherein the main control unit and the monitoring unit are different components.

2. The infusion suction system according to claim 1, characterized in that, The main control unit is also used to send a control signal to the motor driver, the control signal including the desired speed of the motor; the main control unit is communicatively connected to the monitoring unit, and the main control unit also synchronously provides the control signal to the monitoring unit, the monitoring unit controls the first switching unit to be turned on or off according to the desired speed of the motor and the actual speed of the motor after executing the control signal.

3. The infusion suction system according to claim 2, characterized in that, The monitoring unit compares the expected speed of the motor with the actual speed of the motor after the control signal is executed. When the absolute value of the difference between the expected speed of the motor and the actual speed of the motor after the control signal is executed is greater than a preset threshold, the monitoring unit controls the first switch unit to open.

4. The infusion suction system according to claim 2, characterized in that, When the monitoring unit does not receive a control signal from the main control unit, the monitoring unit controls the first switch unit to disconnect.

5. The infusion suction system according to claim 1, characterized in that, The main control unit is communicatively connected to the monitoring unit. When the communication connection between the monitoring unit and the main control unit is broken, the monitoring unit controls the first switch unit to disconnect.

6. The infusion suction system according to claim 5, characterized in that, The main control unit is also used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the monitoring unit does not receive the handshake signal transmitted by the main control unit, the monitoring unit controls the first switch unit to disconnect.

7. The infusion suction system according to claim 1, characterized in that, Also includes: The second switch unit is connected in series with the first switch unit, and the second switch unit is connected to the main control unit, which is used to control the second switch unit to be turned on or off.

8. The infusion suction system according to claim 7, characterized in that, The main control unit is also used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the main control unit does not receive the response signal transmitted by the monitoring unit, the main control unit controls the second switch unit to disconnect.

9. The infusion suction system according to claim 1, characterized in that, Also includes: A current fuse, which is connected in series with the first switching unit.

10. The infusion suction system according to claim 9, characterized in that, The current fuse includes a resettable fuse.

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