A method and device for unblocking nutrient pipes

Abstract

This invention relates to the field of medical device technology, specifically to a method and device for unblocking a feeding tube. The method includes measuring pressure in the air intake channel and plotting a pressure change curve. Based on the pressure changes in the curve, it determines whether the feeding channel is at risk of blockage. Several positive and negative pressure operations are applied to the air intake channel, followed by another pressure measurement to determine if the channel is abnormal. Finally, air is expelled from the air intake channel, and water is injected into the feeding channel to clear it. The device includes an air intake channel, a plotting unit, a blower unit, an extraction unit, a three-way valve, an implementation control unit, and a water injection unit. This improves the representativeness of data for timely analysis of feeding tube flow and optimizes corresponding prevention mechanisms, effectively solving the problem of feeding tube blockage.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and specifically to a method and device for unblocking a nutrient tube. Background Technology

[0002] In the medical field, feeding tubes are crucial for patients who are unable to eat orally. They provide essential nutritional support, maintaining vital signs and bodily functions. However, blockages are a common problem during their use.

[0003] Current methods for clearing blockages in feeding tubes typically address the issue only after blockage has occurred, lacking early warning and prevention mechanisms. This can lead to interruptions in nutritional support, impacting treatment outcomes and recovery. As medical technology advances, the demands on feeding tube clearing methods are increasing. A more efficient, safe, and intelligent method is needed to monitor the tube's operational status in real time, predict blockage trends, and take preventative and clearing measures before blockages occur, ensuring continuous and stable nutritional support for patients.

[0004] For example, Chinese Patent Publication No. CN118384034A discloses an enteral nutrition supply device for ICU patients and a method for unblocking the feeding tube. The device includes a feeding tube with a liquid feeding hole and a connecting tube at both ends. The opening of the connecting tube is equipped with a sealing plug. The upper end of the feeding tube is equipped with a limiting tube. The limiting tube has a transmission component and an unblocking component on both sides. The bottom of the feeding tube is equipped with a rubber plug located below the liquid feeding hole. Both ends of the rubber plug are connected to pull ropes, which pass through the two ends of the feeding tube and are tautly connected to the transmission component. The transmission component is used to move the rubber plug up and down. The limiting tube is equipped with a limiting device for fixing the transmission component. The unblocking component includes an inflation tube and an air pump. One end of the inflation tube is fixed to the upper end of the rubber plug, and the other end extends out of the feeding tube and is equipped with an air plug. Several unblocking rods are also fixedly fitted inside the inflation tube.

[0005] The following problems still exist in the existing technology:

[0006] Existing technologies cannot dynamically acquire information on the risk of blockage during the feeding process of feeding tubes. The data for timely analysis of the flow of the feeding tubes lacks representativeness and corresponding prevention and optimization mechanisms, which is not conducive to the effective solution of the problem of blockage in feeding tubes. Summary of the Invention

[0007] To address these issues, the present invention provides a method and device for unblocking feeding tubes, which overcomes the problems of existing technologies that cannot dynamically obtain information on the risk of blockage during the feeding process of the feeding tube, lack of representative data for timely analysis of the flow status of the feeding tube, and lack of corresponding prevention and optimization mechanisms.

[0008] To achieve the above objectives, the present invention provides a method for unblocking a nutrient duct, comprising:

[0009] After air is blown into the air intake channel inside the feeding tube and then sealed, the pressure of the air intake channel is measured during a preset process, and the pressure change curve of the internal air pressure value of the air intake channel over time is plotted.

[0010] The preset process is the process of injecting nutrients into the feeding channel inside the feeding tube;

[0011] The risk of blockage in the feeding channel is determined based on the changes in air pressure values ​​in the air pressure value change curve.

[0012] Based on the determination that the feeding channel has a risk of blockage, several positive and negative pressure implementation operations are performed on the air intake channel. The positive and negative pressure implementation operations include blowing air into the air intake channel and extracting air.

[0013] The air intake channel, after several positive and negative pressure operations, is sealed again and pressure is measured again. The feeding channel is determined to be abnormal based on the comparison of the internal air pressure value of the air intake channel within the preset pressure measurement time.

[0014] Based on the determination that there is an abnormality in the feeding channel, the air in the air intake cavity is vented, and water is injected into the feeding channel to clear the feeding channel.

[0015] Furthermore, the process of filtering characteristic data points of air pressure change based on the air pressure change curve includes:

[0016] Calculate the slope of several data points on the pressure change curve;

[0017] Data points whose slope exceeds a preset slope threshold are selected as characteristic data points of air pressure value changes.

[0018] Further steps to determine changes in air pressure include:

[0019] Determine the time nodes on the time axis corresponding to the characteristic data points of each air pressure value change;

[0020] Several characteristic data points of air pressure value changes are sorted by time dimension according to the chronological order of time nodes;

[0021] Obtain the internal pressure values ​​corresponding to several pressure change feature data points on the internal pressure value coordinate axis, and sort the several pressure change feature data points by pressure value dimension in ascending order of internal pressure value.

[0022] The comparison between the time dimension sorting and the air pressure value dimension sorting is used to determine the air pressure value change.

[0023] Furthermore, the process of determining whether the feeding passage is at risk of becoming blocked includes:

[0024] If the time dimension sorting is consistent with the air pressure value dimension sorting, then the feeding channel is determined to have a risk of blockage.

[0025] Furthermore, in the positive and negative pressure implementation operation, each positive and negative pressure implementation operation includes blowing air into the air intake channel once and drawing air out once.

[0026] Furthermore, the process of implementing the positive and negative pressure also includes:

[0027] The amount of air injected and extracted in a single operation is adjusted based on the number of characteristic data points of air pressure change. The amount of air injected and extracted in a single operation are positively correlated with the number of characteristic data points of air pressure change.

[0028] The amount of air injected in a single cycle is the same as the amount of air extracted in a single cycle.

[0029] Furthermore, the process of determining the internal air pressure value of the intake cavity within the preset pressure measurement time includes:

[0030] The preset pressure measurement duration is equally divided into a pre-measurement period and a post-measurement period.

[0031] Calculate the average value of the internal air pressure value of the air intake cavity at several time points within the pressure measurement period, and determine the average value as the pressure measurement value of the first period.

[0032] Calculate the average value of the internal air pressure value of the air intake cavity at several time points within the pressure measurement period, and determine the average value as the pressure measurement value of the later stage.

[0033] Furthermore, the process of determining whether the feeding channel is abnormal includes:

[0034] If the difference between the pressure measurement value at the front end and the pressure measurement value at the rear end does not meet the preset requirements, it is determined that there is an abnormality in the feeding channel;

[0035] The preset requirement is that the difference is less than a preset difference threshold.

[0036] Furthermore, the present invention also provides a nutrient tube unblocking device, comprising:

[0037] An air intake chamber is located inside the feeding tube and is arranged in parallel with the feeding channel inside the feeding tube. It includes a gas inlet and outlet and a gas chamber, so as to blow air into the gas chamber and draw air out through the gas inlet and outlet.

[0038] The gas inlet and outlet are also used to seal the air intake cavity;

[0039] The graph plotting unit is connected to the air intake channel and is used to plot the air pressure value change curve of the internal air pressure value of the air intake channel over time and to determine whether the feeding channel has a risk of blockage.

[0040] A blower unit for blowing air into an air intake chamber, including a blower and a duct connected to the blower;

[0041] An extraction unit for drawing air into the intake chamber includes a negative pressure pump and a pipe connected to the negative pressure pump.

[0042] The three-way valve is connected to the air intake chamber, the blower unit, and the extraction unit respectively, and is used to control the connection and disconnection between the blower unit and the air intake chamber, as well as the connection and disconnection between the extraction unit and the air intake chamber.

[0043] An implementation control unit is connected to the blower unit, the extraction unit, and the three-way valve, respectively, to control the blower unit to blow air into the air intake channel, control the extraction unit to extract air from the air intake channel, and control the opening and closing of the three-way valve.

[0044] Furthermore, the implementation control unit is also connected to a water injection unit, which is connected to the feeding channel of the nutrition tube for injecting water into the feeding channel.

[0045] Compared with the prior art, the beneficial effects of the present invention are as follows: The pipe unblocking method of the present invention includes measuring the pressure of the air intake channel, plotting the pressure change curve of the internal air pressure value of the air intake channel over time, determining whether the feeding channel has a risk of blockage based on the pressure change curve, determining whether the feeding channel is abnormal by performing several positive and negative pressure operations on the air intake channel and measuring the pressure again, and finally expelling the air in the air intake channel and injecting water into the feeding channel to unblock it. The pipe unblocking device of the present invention includes an air intake channel, a plotting unit, a blower unit, an extraction unit, a three-way valve, an implementation control unit, and a water injection unit. Therefore, it improves the representativeness of data lacking timely analysis of the feeding tube flow and optimizes the corresponding prevention mechanism, thus effectively solving the problem of blockage in the feeding tube feeding channel.

[0046] In particular, this invention calculates the slope of data points in the pressure change curve and filters data points with slopes exceeding a preset slope threshold as characteristic data points of pressure change. This allows for the sensitive detection of abnormal points in pressure changes. The filtered characteristic data points of pressure change are sorted in both time and pressure dimensions. It can be understood that if the sorting of characteristic data points in both time and pressure dimensions is consistent, it indicates that the pressure value of the characteristic data points is continuously increasing. This suggests that factors hindering the flow of nutrients have appeared in the feeding channel, causing the internal pressure of the air intake cavity to continuously increase due to the continuous compression of the feeding channel. By comparing the sorting of these two dimensions, the risk of blockage is determined, further improving the accuracy of the judgment. This enables the dynamic acquisition of the blockage risk during the feeding process of the feeding tube, improving the representativeness of data lacking timely analysis of the flow of the feeding tube.

[0047] In particular, this invention utilizes positive and negative pressure to induce and extract air, creating a relatively stable alternating positive and negative pressure environment within the air intake channel. For the feeding tube, this stable alternation of positive and negative pressure helps to move blockages and initially alleviates the blockage. It is understood that when the number of pressure change characteristic data points is small, it indicates a relatively mild blockage. In this case, the amount of air introduced and extracted per cycle can be reduced accordingly. This achieves a certain unblocking effect while avoiding excessive impact on the feeding channel due to excessive pressure. Conversely, if the number of pressure change characteristic data points is large, it indicates a potentially more complex or severe blockage. In this case, the amount of air introduced and extracted per cycle can be increased to apply stronger positive and negative pressure forces to the blockage, thereby increasing the probability of successful unblocking. Furthermore, this invention improves the representativeness of data lacking timely analysis of feeding tube flow and optimizes corresponding prevention mechanisms, effectively solving the problem of blockage in the feeding tube's feeding channel, improving the normal operating efficiency of the feeding tube, and ensuring smooth nutrient delivery.

[0048] In particular, this invention divides the preset pressure measurement time into a pre-measurement period and a post-measurement period, and then calculates the average value of the internal air pressure at several time points in the air intake cavity within these two periods. This allows for a more detailed capture of the air pressure characteristics at different stages of the pressure measurement process, reflecting the possible phased changes in air pressure during the measurement. It is understood that when the feeding channel recovers from slight blockage to normal operation, the internal pressure on the feeding tube decreases, reducing the degree of compression of the air intake cavity. This results in a more significant difference between the pre- and post-measurement pressure values. If the difference is small, it indicates that the degree of compression of the air intake cavity by the feeding tube remains almost constant, suggesting that abnormal blockage still exists. This improves the representativeness of data lacking timely analysis of the feeding tube's flow status and optimizes the corresponding prevention mechanism, effectively solving the problem of blockage in the feeding tube's feeding channel, improving the normal operating efficiency of the feeding tube, and ensuring smooth nutrient delivery.

[0049] In particular, when an abnormality is detected in the feeding channel, this invention expels the air from the air intake chamber and then injects water into the feeding channel to clear the blockage. It is understood that expels the air from the air intake chamber, which reduces the internal air pressure, allowing the feeding tube to be squeezed into the air intake chamber, thus expanding the inner diameter of the feeding channel. Then, by injecting water into the feeding channel, the injected water washes away the blockage with its flushing force, restoring the unobstructed flow of the feeding channel. In this way, the problem of blockage in the feeding tube is effectively solved, improving the normal operating efficiency of the feeding tube and ensuring smooth nutrient delivery. Attached Figure Description

[0050] Figure 1 This is a flowchart illustrating the steps of the nutrient tube unblocking method according to an embodiment of the present invention;

[0051] Figure 2 This is a flowchart illustrating the steps for determining changes in air pressure in an embodiment of the present invention.

[0052] Figure 3 This is a flowchart illustrating the logic of determining whether the feeding channel is abnormal according to an embodiment of the present invention.

[0053] Figure 4 This is a simplified structural diagram of the nutrient pipe and the pipe unblocking device according to an embodiment of the present invention;

[0054] In the diagram: 1. Feeding tube, 2. Gas chamber, 3. Feeding channel, 4. Gas inlet and outlet, 5. Fan, 6. Negative pressure pump, 7. Three-way valve, 8. Water injection unit. Detailed Implementation

[0055] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0056] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0057] It should be noted that in the description of this invention, the terms "upper," "lower," "inner," "outer," etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0058] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] Please see Figure 1 The diagram shows the steps of a method for unblocking a nutrient tube according to an embodiment of the present invention. The method for unblocking a nutrient tube according to the present invention includes:

[0060] Step S100: After blowing air into the air intake channel inside the nutrient tube 1, the tube is sealed. The pressure of the air intake channel is measured during a preset process, and the pressure change curve of the internal air pressure value of the air intake channel over time is plotted.

[0061] The preset process is the process of injecting nutrients into the feeding channel 3 inside the feeding tube 1.

[0062] Step S200: Determine whether the feeding channel 3 has a risk of blockage based on the air pressure value change curve.

[0063] Step S300: Based on the determination that the feeding channel 3 has a risk of blockage, perform several positive and negative pressure implementation operations on the air intake channel. The positive and negative pressure implementation operations include blowing air into the air intake channel and extracting air.

[0064] Step S400: After completing several positive and negative pressure operations, the air intake channel is sealed again and pressure is measured again. Based on the comparison of the internal air pressure values ​​of the air intake channel within the preset pressure measurement time, it is determined whether the feeding channel 3 is abnormal.

[0065] Step S500: Based on the determination that there is an abnormality in the feeding channel 3, the air in the air intake cavity is discharged, and water is injected into the feeding channel 3 to clear the feeding channel 3.

[0066] Specifically, when the feeding channel 3 is determined to be abnormal, the present invention expels the air from the air intake cavity and then injects water into the feeding channel 3 to clear the blockage. It can be understood that expelling the air from the air intake cavity reduces the air pressure inside the air intake cavity, which is beneficial for the feeding tube to squeeze into the air intake cavity, thus expanding the inner diameter of the feeding channel 3. Then, by injecting water into the feeding channel 3, the injected water washes away the blockage with its flushing force, restoring the unobstructed flow of the feeding channel 3. In this way, the problem of blockage in the feeding tube feeding channel is effectively solved, the normal use efficiency of the feeding tube 1 is improved, and the smooth delivery of nutrients is ensured.

[0067] Specifically, the process of selecting characteristic data points of air pressure change based on the air pressure change curve includes:

[0068] Calculate the slope of several data points on the pressure change curve;

[0069] Data points whose slope exceeds a preset slope threshold are selected as characteristic data points of air pressure value changes.

[0070] In implementation, the value of the preset slope threshold can be determined based on pre-testing and calculation. The internal air pressure value of the air intake cavity during the process of injecting nutrients into the feeding channel 3 is pre-tested and recorded as a curve of air pressure value change over time. The average slope of several data points on the curve of air pressure value change is calculated, and the average slope is determined as the preset slope threshold. Preferably, a preset slope threshold value of 0.15 is provided here.

[0071] Specifically, this invention does not limit the method of calculating the slope of data points on the pressure change curve. The slope of data points on the pressure change curve can be calculated using the difference method, which is existing technology and will not be described in detail here.

[0072] Specifically, please refer to Figure 2 The diagram illustrates the steps for determining changes in air pressure according to an embodiment of the present invention. The steps for determining changes in air pressure include:

[0073] Step S201: Determine the time nodes corresponding to the characteristic data points of each air pressure value change on the time coordinate axis;

[0074] Step S202: Sort several characteristic data points of air pressure value changes in chronological order according to the time nodes;

[0075] Step S203: Obtain the internal pressure value corresponding to each of the several pressure value change feature data points on the internal pressure value coordinate axis, and sort the several pressure value change feature data points in the order of internal pressure value from small to large by pressure value dimension.

[0076] Step S204: The comparison between the time dimension sorting and the air pressure value dimension sorting is determined as the air pressure value change.

[0077] In implementation, if there are four air pressure change characteristic data points A, B, C, and D, determine the corresponding time nodes on the time axis for each data point. For example, the time node corresponding to air pressure change characteristic data point A is ta = 5s, the time node corresponding to air pressure change characteristic data point B is tb = 10s, the time node corresponding to air pressure change characteristic data point C is tc = 20s, and the time node corresponding to air pressure change characteristic data point D is td = 55s. Based on the order of these time nodes, the air pressure change characteristic data points are sorted by time dimension as A, B, C, and D. Feature data point A corresponds to an internal pressure value of Pa = 103 kPa on the internal pressure value coordinate axis. Feature data point B corresponds to an internal pressure value of Pb = 107 kPa on the internal pressure value coordinate axis. Feature data point C corresponds to an internal pressure value of Pc = 104 kPa on the internal pressure value coordinate axis. Feature data point D corresponds to an internal pressure value of Pd = 106 kPa on the internal pressure value coordinate axis. Therefore, the internal pressure values ​​corresponding to the feature data points of pressure change are sorted in ascending order as A, C, D, B. That is, the sorting of the feature data points of pressure change in the time dimension is inconsistent with the sorting in the pressure value dimension.

[0078] Specifically, the process of determining whether feeding pathway 3 has a risk of becoming blocked includes:

[0079] If the time dimension sorting is inconsistent with the air pressure value dimension sorting, then the feeding channel 3 is determined not to have a risk of blockage.

[0080] If the time dimension sorting is consistent with the air pressure value dimension sorting, then the feeding channel 3 is determined to have a risk of blockage.

[0081] Specifically, this invention calculates the slope of data points in the pressure change curve and filters data points with slopes exceeding a preset slope threshold as characteristic data points of pressure change. This allows for the sensitive detection of abnormal points in pressure changes. The filtered characteristic data points of pressure change are sorted in both time and pressure dimensions. It can be understood that if the sorting of the characteristic data points in both time and pressure dimensions is consistent, it indicates that the pressure value of the characteristic data points is continuously increasing. This suggests that some factors in the feeding channel 3 are hindering the flow of nutrients, causing the internal pressure value of the air intake cavity to continuously increase due to the continuous compression of the air intake cavity by the feeding channel 3. By comparing the sorting of these two dimensions, the risk of blockage trend is determined, further improving the accuracy of the judgment. This enables the dynamic acquisition of the blockage risk during the feeding process of the feeding tube, improving the representativeness of data lacking timely analysis of the flow status of the feeding tube 1.

[0082] Specifically, in the positive and negative pressure implementation operation, each positive and negative pressure implementation operation includes blowing air into the air intake channel once and drawing air out once.

[0083] Specifically, the process of implementing the positive and negative pressure also includes:

[0084] The amount of air injected and extracted in a single operation is adjusted based on the number of characteristic data points of air pressure change. The amount of air injected and extracted in a single operation are positively correlated with the number of characteristic data points of air pressure change.

[0085] The amount of air injected in a single cycle is the same as the amount of air extracted in a single cycle.

[0086] Specifically, this invention utilizes positive and negative pressure to induce and extract air, creating a relatively stable alternating positive and negative pressure environment within the air intake channel. For the feeding tube, this stable alternation of positive and negative pressure helps to move blockages and initially alleviates the blockage. It can be understood that when the number of pressure change characteristic data points is small, it indicates a relatively mild blockage. In this case, the amount of air introduced and extracted per cycle can be reduced accordingly. This achieves a certain unblocking effect while avoiding excessive impact on the feeding channel 3 due to excessive pressure. Conversely, if the number of pressure change characteristic data points is large, it indicates a potentially complex or severe blockage. In this case, the amount of air introduced and extracted per cycle can be increased to apply stronger positive and negative pressure forces to the blockage, thereby increasing the probability of successful unblocking. Furthermore, this improves the representativeness of data lacking timely analysis of the feeding tube's flow status and optimizes the corresponding prevention mechanisms, effectively solving the problem of blockage in the feeding tube's feeding channel, improving the normal operating efficiency of the feeding tube 1, and ensuring smooth nutrient delivery.

[0087] Specifically, the process of determining the internal air pressure value of the intake cavity within a preset pressure measurement period includes:

[0088] The preset pressure measurement duration is equally divided into a pre-measurement period and a post-measurement period.

[0089] Calculate the average value of the internal air pressure value of the air intake cavity at several time points within the pressure measurement period, and determine the average value as the pressure measurement value P1.

[0090] Calculate the average value of the internal air pressure value of the air intake cavity at several time points within the pressure measurement period, and determine the average value as the pressure measurement value P2 of the later stage.

[0091] Specifically, please refer to Figure 3 As shown, it is a flowchart of the logic for determining whether the feeding channel 3 is abnormal according to an embodiment of the present invention. The process of determining whether the feeding channel 3 is abnormal includes:

[0092] If the difference between the front pressure measurement value P1 and the rear pressure measurement value P2 meets the preset requirements, then it is determined that there is no abnormality in the feeding channel 3;

[0093] If the difference between the front pressure measurement value P1 and the rear pressure measurement value P2 does not meet the preset requirements, it is determined that there is an abnormality in the feeding channel 3.

[0094] The preset requirement is that the difference is less than a preset difference threshold.

[0095] In practice, the preset difference threshold is set by those skilled in the art based on the required detection sensitivity. The higher the required detection sensitivity, the larger the difference threshold. Here, a preferred value is provided: the difference threshold can be 2.8 kPa.

[0096] Specifically, this invention divides the preset pressure measurement time into a pre-measurement period and a post-measurement period, and then calculates the average internal air pressure value at several time points in the air intake cavity within these two periods. This allows for a more detailed capture of the air pressure characteristics at different stages of the pressure measurement process, reflecting the possible phased changes in air pressure during the measurement. It is understood that when the feeding channel 3 recovers from slight blockage to normal operation, the internal pressure on the feeding tube decreases, reducing the degree of compression of the air intake cavity. This results in a more significant difference between the pre- and post-measurement pressure values. If the difference is small, it indicates that the degree of compression of the air intake cavity by the feeding tube remains almost constant, suggesting that abnormal blockage still exists in the feeding tube. This improves the representativeness of data lacking timely analysis of the flow status of the feeding tube 1 and optimizes the corresponding prevention mechanism, effectively solving the problem of blockage in the feeding tube's feeding channel, improving the normal operating efficiency of the feeding tube 1, and ensuring smooth nutrient delivery.

[0097] Specifically, please refer to Figure 4 The diagram shown is a simplified structural diagram of a nutrient pipe and a pipe unblocking device according to an embodiment of the present invention. The present invention also provides a pipe unblocking device, comprising:

[0098] An air intake cavity is located inside the feeding tube 1 and is arranged in parallel with the feeding channel 3 inside the feeding tube 1. It includes a gas inlet / outlet 4 and a gas chamber 2, so as to blow air into the gas chamber 2 and draw air out through the gas inlet / outlet 4.

[0099] The gas inlet / outlet 4 is also used to seal the air intake cavity;

[0100] The graph drawing unit is connected to the air intake channel and is used to draw the air pressure value change curve of the internal air pressure value of the air intake channel over time and to determine whether the feeding channel 3 has a risk of blockage.

[0101] A blower unit for blowing air into the air intake chamber includes a blower 5 and a pipe connected to the blower 5.

[0102] An extraction unit for extracting air into the air intake chamber includes a negative pressure pump 6 and a pipe connected to the negative pressure pump 6.

[0103] The three-way valve 7 is connected to the air intake passage, the blower unit and the extraction unit respectively, and is used to control the connection and disconnection between the blower unit and the air intake passage and the connection and disconnection between the extraction unit and the air intake passage.

[0104] An implementation control unit is connected to the blower unit, the extraction unit, and the three-way valve 7, respectively, to control the blower unit to blow air into the air intake channel, control the extraction unit to extract air from the air intake channel, and control the opening and closing of the three-way valve 7.

[0105] Specifically, solenoid valves are also installed at the four gas inlets and outlets to control the opening and closing of the gas inlets and outlets, so as to realize the gas flow in the air intake channel and the sealing of the air intake channel. The solenoid valves controlling the opening and closing of the inlets and outlets are existing technologies and will not be described in detail here.

[0106] Specifically, the present invention does not limit the specific structure of the graph drawing unit. Preferably, it can be a piezoresistive pressure sensor and a microprocessor connected to each other, so as to collect the air pressure value in the air intake cavity through the piezoresistive pressure sensor, and send the collected air pressure value to the microprocessor for data filtering and generation of pressure value change curve. This is the prior art and will not be described in detail here.

[0107] Specifically, the present invention does not limit the fan 5 of the blower unit. Preferably, it can be a small centrifugal fan, which will not be described in detail here.

[0108] Specifically, the present invention does not limit the negative pressure pump of the extraction unit. Preferably, it can be a miniature negative pressure pump, which will not be elaborated here.

[0109] In practice, by controlling the single-run duration of the small centrifugal fan and the single-run duration of the micro negative pressure pump, the amount of air blown in each time is the same as the amount of air extracted each time.

[0110] Specifically, the three-way valve 7 is widely used in mechanical, electrical and fluid control fields, which will not be elaborated here.

[0111] Specifically, the present invention does not limit the specific structure of the control unit, which can be constructed using logic components, such as field-programmable logic components and processors used in computers, etc., which will not be elaborated here.

[0112] Specifically, the implementation control unit is also connected to the water injection unit 8, which is connected to the feeding channel 3 of the nutrition tube 1, and is used to inject water into the feeding channel 3.

[0113] In practice, a peristaltic pump or a syringe can be used to inject water into the feeding channel 3, which will not be elaborated here.

[0114] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0115] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for unblocking nutrient channels, characterized in that, include: After air is blown into the air intake channel inside the feeding tube and then sealed, the pressure of the air intake channel is measured during a preset process, and the pressure change curve of the internal air pressure value of the air intake channel over time is plotted. The preset process is the process of injecting nutrients into the feeding channel inside the feeding tube; The risk of blockage in the feeding channel is determined based on the changes in air pressure values ​​in the air pressure value change curve. Based on the determination that the feeding channel has a risk of blockage, several positive and negative pressure implementation operations are performed on the air intake channel. The positive and negative pressure implementation operations include blowing air into the air intake channel and extracting air. The air intake channel, after several positive and negative pressure operations, is sealed again and pressure is measured again. The feeding channel is determined to be abnormal based on the comparison of the internal air pressure value of the air intake channel within the preset pressure measurement time. Based on the determination that there is an abnormality in the feeding channel, the air in the air intake cavity is discharged, and water is injected into the feeding channel to clear the feeding channel. The process of selecting characteristic data points of air pressure change based on the air pressure change curve includes: Calculate the slope of several data points on the pressure change curve; Data points whose slope exceeds a preset slope threshold are selected as characteristic data points of air pressure value changes; The steps to determine changes in air pressure include: Determine the time nodes on the time axis corresponding to the characteristic data points of each air pressure value change; Several characteristic data points of air pressure value changes are sorted by time dimension according to the chronological order of time nodes; Obtain the internal pressure values ​​corresponding to several pressure change feature data points on the internal pressure value coordinate axis, and sort the several pressure change feature data points by pressure value dimension in ascending order of internal pressure value. The comparison between the time-dimension sorting and the air pressure value-dimension sorting is used to determine the air pressure value change. The process of determining whether the feeding passage is at risk of becoming blocked includes: If the time dimension sorting is consistent with the air pressure value dimension sorting, then the feeding channel is determined to have a risk of blockage. The process of determining the internal air pressure value of the intake cavity within the preset pressure measurement time includes: The preset pressure measurement duration is equally divided into a pre-measurement period and a post-measurement period. Calculate the average value of the internal air pressure value of the air intake cavity at several time points within the pressure measurement period, and determine the average value as the pressure measurement value of the first period. Calculate the average value of the internal air pressure value of the air intake cavity at several time points within the pressure measurement period, and determine the average value as the pressure measurement value of the later stage. The process of determining whether the feeding channel is abnormal includes: If the difference between the pressure measurement value at the front end and the pressure measurement value at the rear end does not meet the preset requirements, it is determined that there is an abnormality in the feeding channel; The preset requirement is that the difference is less than a preset difference threshold.

2. The method for unblocking nutrient tubes according to claim 1, characterized in that, In the positive and negative pressure implementation operation, each positive and negative pressure implementation operation includes blowing air into the air intake channel once and drawing air out once.

3. The method for unblocking nutrient tubes according to claim 2, characterized in that, The process of implementing the positive and negative pressure also includes: The amount of air injected and extracted in a single operation is adjusted based on the number of characteristic data points of air pressure change. The amount of air injected and extracted in a single operation are positively correlated with the number of characteristic data points of air pressure change. The amount of air injected in a single cycle is the same as the amount of air extracted in a single cycle.

4. A device for unblocking nutrient pipes, used to perform the method for unblocking nutrient pipes according to any one of claims 1-3, characterized in that, include: An air intake chamber is located inside the feeding tube and is arranged in parallel with the feeding channel inside the feeding tube. It includes a gas inlet and outlet and a gas chamber, so as to blow air into the gas chamber and draw air out through the gas inlet and outlet. The gas inlet and outlet are also used to seal the air intake cavity; The graph plotting unit is connected to the air intake channel and is used to plot the air pressure value change curve of the internal air pressure value of the air intake channel over time and to determine whether the feeding channel has a risk of blockage. A blower unit for blowing air into an air intake chamber, including a blower and a duct connected to the blower; An extraction unit for drawing air into the intake chamber includes a negative pressure pump and a pipe connected to the negative pressure pump. The three-way valve is connected to the air intake chamber, the blower unit, and the extraction unit respectively, and is used to control the connection and disconnection between the blower unit and the air intake chamber, as well as the connection and disconnection between the extraction unit and the air intake chamber. An implementation control unit is connected to the blower unit, the extraction unit, and the three-way valve, respectively, to control the blower unit to blow air into the air intake channel, control the extraction unit to extract air from the air intake channel, and control the opening and closing of the three-way valve.

5. The nutrient pipe unblocking device according to claim 4, characterized in that, The implementation control unit is also connected to a water injection unit, which is connected to the feeding channel of the nutrition tube to inject water into the feeding channel.

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