Filter residual life monitoring method and device, filter and medical equipment

Abstract

The invention provides a filter residual life monitoring method and device, a filter and medical equipment. The filter residual life monitoring method comprises the following steps: acquiring gas transmission flow and gas transmission concentration passing through the filter; calculating the filter material consumption of the filter according to the gas transmission flow and the gas transmission concentration; and determining the residual life of the filter according to the consumption of the filter material and the total amount of the filter material of the filter. According to the technology, the filter material consumption of the filter is calculated in real time through the gas transmission flow and the gas transmission concentration, so that the residual life of the filter is monitored, and waste of the filter material is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a filter remaining life monitoring method, device, filter and medical equipment. Background Art

[0002] Inhalation therapy is to supply therapeutic gases to patients through ventilators and other equipment to achieve medical effects. Taking nitric oxide gas as an example, nitric oxide has been found in recent years to play a role in transmitting important information and regulating cell functions in the human body. It can help promote blood circulation in the body. It can quickly diffuse through the biological membrane without any intermediary mechanism, and transmit the information generated by a cell to the cells around it. Nitric oxide has the characteristics of multiple biological functions, and is very easy to participate in the transfer of electrons and join the body's redox process. Direct inhalation nitric oxide therapy is approved by the US Food and Drug Administration as a treatment for persistent pulmonary hypertension in newborns, and has been proven to improve the body's oxygenation capacity and reduce the risk of extracorporeal cardiopulmonary support for critically ill patients. Artificial administration of appropriate and controlled nitric oxide can specifically reduce pulmonary hypertension and improve oxygenation. At present, nitric oxide inhalation therapy has been widely used in neonatal respiratory medicine, and is also suitable for clinical medicine fields such as critical care, cardiothoracic vascular surgery, respiratory medicine and anesthesia.

[0003] Before the therapeutic gas is input into the patient, it is usually necessary to filter the non-therapeutic gas in it through a filter. Taking nitric oxide gas as an example, since it is easily oxidized to NO2, a nitrogen dioxide filter needs to be set up to filter the NO2 component in the gas. The filter material in the filter is a consumable. Its effective usable life will continue to decrease during the inhalation therapy. In order to avoid safety risks caused by the exhaustion of the filter material, the therapeutic gas equipment usually monitors the remaining life of the filter and displays it to prompt the user to replace it in time. Furthermore, the consumption rate of the filter material is affected by factors such as flow rate and therapeutic gas concentration, and there is still a reaction of NO2 generation inside the filter. The nonlinear relationship between the filter material consumption and various factors cannot be simply calculated using a formula.

[0004] In the prior art, in order to facilitate the statistics of the remaining life of the filter material and avoid the situation where the filter material is used up in advance, some manufacturers usually first measure the total available time of the filter material under the maximum consumption condition, and then deduct the actual use time as the remaining available life, or record the consumption of the filter material at the maximum consumption rate. Therefore, when the calculated service life is reached, there is actually still a large amount of filter material that has not been used. Not only does this waste the filter material and increase user costs, but it also increases the frequency of filter replacement, resulting in inconvenience in use. Summary of the invention

[0005] The purpose of the present invention is to provide a filter remaining life monitoring method, device, filter and medical equipment to alleviate the technical problems of filter material waste and high filter replacement frequency in the prior art, thereby avoiding filter material waste and reducing the filter replacement frequency.

[0006] In the first aspect, an embodiment of the present invention provides a method for monitoring the remaining life of a filter, comprising: obtaining a gas transmission flow rate and a gas transmission concentration passing through the filter; calculating a filter material consumption of the filter based on the gas transmission flow rate and the gas transmission concentration; and determining the remaining life of the filter based on the filter material consumption and the total amount of filter material in the filter.

[0007] In a preferred embodiment of the present invention, the step of calculating the filter material consumption of the above-mentioned filter according to the above-mentioned gas transmission flow rate and the above-mentioned gas transmission concentration includes: calculating the filter material consumption rate based on a preset correlation formula between the filter material consumption rate and the gas transmission concentration according to the above-mentioned gas transmission concentration and the above-mentioned gas transmission flow rate; the above-mentioned correlation formula is constructed based on the correspondence between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates; and calculating the filter material consumption of the above-mentioned filter according to the above-mentioned filter material consumption rate.

[0008] In a preferred embodiment of the present invention, based on a preset correlation formula between filter material consumption rate and gas transmission concentration, before the step of calculating the filter material consumption rate according to the above-mentioned gas transmission concentration, the above-mentioned method includes: obtaining the above-mentioned historical gas transmission flow rate, the above-mentioned historical filter material consumption rate and the above-mentioned historical gas transmission concentration; drawing a relationship curve between the above-mentioned historical filter material consumption rate and the above-mentioned historical gas transmission concentration under different above-mentioned historical gas transmission flow rates; and determining the above-mentioned correlation formula based on the above-mentioned relationship curve.

[0009] In a preferred embodiment of the present invention, the above correlation formula is a linear function; according to the above relationship curve, the step of determining the above correlation formula includes: based on a preset historical gas transmission concentration range, intercepting the target point in the above relationship curve; fitting a straight line according to the above target point to obtain a straight line segment; according to the above straight line segment, determining the slope and intercept of the above linear function to obtain the correlation formula.

[0010] In a preferred embodiment of the present invention, the step of fitting a straight line according to the target point to obtain a straight line segment includes: determining a line connecting two end points of the target point as a straight line segment.

[0011] In a preferred embodiment of the present invention, the above-mentioned historical gas transmission concentration interval includes multiple sub-intervals; based on the preset historical gas transmission concentration interval, the step of intercepting the target point in the above-mentioned relationship curve includes: based on the above-mentioned sub-interval, intercepting the target point in the above-mentioned relationship curve; the step of fitting the above-mentioned target point with a straight line to obtain a straight line segment includes: connecting the endpoints of the target point corresponding to each of the above-mentioned sub-intervals to obtain multiple first straight line segments; according to the above-mentioned straight line segments, determining the slope and intercept of the above-mentioned linear function to obtain the correlation formula step includes: according to the slope and intercept of each straight line segment, determining the slope and intercept of the above-mentioned linear function corresponding to each of the above-mentioned sub-intervals to obtain the correlation formula.

[0012] In a preferred embodiment of the present invention, the step of determining the above-mentioned correlation formula according to the above-mentioned relationship curve includes: selecting the first target point with the lowest historical filter material consumption rate and the lowest historical gas transmission concentration from the above-mentioned target points, and multiple second target points with the highest historical gas transmission concentration corresponding to different historical gas transmission flow rates; obtaining multiple straight line segments according to the above-mentioned first target point and the above-mentioned multiple second target points; calculating the slope of each straight line segment in the above-mentioned multiple straight line segments; fitting the first relationship between the slope of the above-mentioned correlation formula and the above-mentioned historical gas transmission flow rate according to the slope of each straight line segment; substituting the above-mentioned first relationship into the slope of the above-mentioned linear function, and calculating the intercept of the above-mentioned linear function; and obtaining the above-mentioned correlation formula.

[0013] In a preferred embodiment of the present invention, after the step of drawing the relationship curve between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates, the method includes: fitting the constant terms in the relationship curve corresponding to different historical gas transmission flow rates and the historical gas transmission flow rates to obtain different constant term sequences; fitting the constant term sequence with the corresponding historical gas transmission flow rates to obtain a third relationship sequence; the step of calculating the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration includes: determining the target constant term sequence corresponding to the gas transmission flow rate according to the gas transmission flow rate and the third relationship sequence; determining the target filter material consumption rate corresponding to the gas transmission flow rate according to the target constant term sequence and the relationship curve; calculating the filter material consumption of the filter according to the target filter material consumption rate.

[0014] In the second aspect, an embodiment of the present invention also provides a filter remaining life monitoring device, including: a data acquisition module, used to obtain the gas transmission flow and gas transmission concentration passing through the filter; a consumption calculation module, used to calculate the filter material consumption of the above-mentioned filter based on the above-mentioned gas transmission flow and the above-mentioned gas transmission concentration; a life monitoring module, used to determine the remaining life of the above-mentioned filter based on the above-mentioned filter material consumption and the total amount of filter material of the above-mentioned filter.

[0015] In a third aspect, an embodiment of the present invention provides a filter, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the filter remaining life monitoring method.

[0016] In a fourth aspect, an embodiment of the present invention further provides a medical device, which further includes a therapeutic gas transmission device connected to the filter; the therapeutic gas transmission device includes: a therapeutic gas preparation unit, a parameter information acquisition unit, a therapeutic gas output terminal and a display module connected in sequence; the therapeutic gas preparation unit is used to prepare therapeutic gas, and input the therapeutic gas into the filter for filtering; the parameter information acquisition unit is used to obtain the gas transmission flow rate and gas transmission concentration of the therapeutic gas after filtering by the filter; the therapeutic gas output terminal is used to output the filtered therapeutic gas; and the display module is used to display the remaining life of the filter.

[0017] The embodiments of the present invention provide a method, device, filter and medical equipment for monitoring the remaining life of a filter, including: obtaining the gas transmission flow and gas transmission concentration through the filter; calculating the filter material consumption of the filter according to the gas transmission flow and gas transmission concentration; determining the remaining life of the filter according to the filter material consumption and the total amount of filter material in the filter. The technology calculates the filter material consumption of the filter in real time through the gas transmission flow and gas transmission concentration, thereby monitoring the remaining life of the filter and avoiding waste of filter material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic flow chart of a filter remaining life monitoring method provided by an embodiment of the present invention;

[0020] Figure 2 A schematic flow chart of another filter remaining life monitoring method provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a correlation formula provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of another correlation formula provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a third correlation formula provided by an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a first relationship provided by an embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of a plurality of straight line segments obtained in the third implementation mode;

[0026] Figure 8 A schematic diagram of a filter material consumption rate-gas transmission concentration curve provided by an embodiment of the present invention;

[0027] Fig. 9 A schematic diagram of the structure of a filter remaining life monitoring device provided by an embodiment of the present invention;

[0028] Fig.10 A schematic diagram of the structure of a filter provided in an embodiment of the present invention.

[0029] Icons: 31 - data acquisition module; 32 - consumption calculation module; 33 - life monitoring module; 41 - memory; 42 - processor; 43 - bus; 44 - communication interface. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] At present, in order to facilitate the statistics of the remaining life of the filter material and avoid the situation where the filter material is used up in advance, some manufacturers usually first measure the total available time of the filter material under the maximum consumption condition, and then deduct the actual use time as the remaining available life, or record the consumption of the filter material at the maximum consumption rate. Therefore, when the calculated service life is reached, there is actually still a large amount of filter material that has not been used. Not only does this waste the filter material and increase user costs, but it also increases the frequency of filter replacement, resulting in inconvenience in use.

[0032] Based on this, the embodiment of the present invention provides a filter remaining life monitoring method, device and filter. The technology calculates the filter material consumption of the filter in real time through the gas transmission flow rate and gas transmission concentration, thereby monitoring the remaining life of the filter, thereby avoiding waste of filter material. To facilitate understanding of the embodiment of the present invention, a filter remaining life monitoring method disclosed in the embodiment of the present invention is first introduced in detail.

[0033] Example 1

[0034] In this embodiment, Figure 1 A schematic flow chart of a filter remaining life monitoring method provided in an embodiment of the present invention.

[0035] Depend on Figure 1 As can be seen, the method includes:

[0036] Step S101: Acquire the gas transmission flow rate and gas transmission concentration through the filter.

[0037] In this embodiment, the filter includes: an air inlet, an air outlet, and a chamber extending between the air inlet and the air outlet, the chamber containing filter material, which is configured to reduce nitrogen dioxide in the gas passing through the filter. Further, the filter also includes: an external storage device, the storage device stores one or more parameters of the following group: total amount of filter material, cumulative filter material consumption, and remaining available amount of filter material. Further, the filter body is connected to the storage device via a communication interface.

[0038] Step S102: Calculating the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration.

[0039] In this embodiment, before the above-mentioned step S102, the correspondence between the above-mentioned gas transmission flow rate and the above-mentioned gas transmission concentration and the filter material consumption is obtained by means of experiments, and the above-mentioned correspondence is stored, so that the above-mentioned correspondence is called in the above-mentioned step S102, so that the filter material consumption of the above-mentioned filter can be calculated through the above-mentioned gas transmission flow rate and the above-mentioned gas transmission concentration.

[0040] Step S103: determining the remaining life of the filter according to the filter material consumption and the total amount of filter material in the filter.

[0041] In this embodiment, the remaining filter material is obtained by the difference between the total amount of filter material and the filter material consumption, so that the remaining life of the filter can be determined based on the remaining filter material.

[0042] In this embodiment, the remaining filter life is Among them, V total is the total amount of filter material, V rest Further, the remaining life of the filter can be displayed on the display interface in the form of percentage or duration.

[0043] The embodiment of the present invention provides a method for monitoring the remaining life of a filter, comprising: obtaining the gas transmission flow rate and gas transmission concentration through the filter; calculating the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration; determining the remaining life of the filter according to the filter material consumption and the total amount of filter material in the filter. The technology calculates the filter material consumption of the filter in real time through the gas transmission flow rate and the gas transmission concentration, thereby monitoring the remaining life of the filter and avoiding waste of filter material.

[0044] Example 2

[0045] Based on the above embodiments, Figure 2 A schematic flow chart of another filter remaining life monitoring method provided in an embodiment of the present invention.

[0046] Depend on Figure 2 As can be seen, the method includes:

[0047] Step S201: Obtain the gas transmission flow rate and gas transmission concentration through the filter.

[0048] Step S202: Based on a preset correlation formula between filter material consumption rate and gas transmission concentration, the filter material consumption rate is calculated according to the above-mentioned gas transmission concentration and the above-mentioned gas transmission flow rate; the above-mentioned correlation formula is constructed based on the correspondence between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates.

[0049] In this embodiment, based on a preset correlation formula between filter material consumption rate and gas transmission concentration, before the step of calculating the filter material consumption rate according to the above-mentioned gas transmission concentration, the above-mentioned method includes: obtaining the above-mentioned historical gas transmission flow rate, the above-mentioned historical filter material consumption rate and the above-mentioned historical gas transmission concentration; drawing a relationship curve between the above-mentioned historical filter material consumption rate and the above-mentioned historical gas transmission concentration under different above-mentioned historical gas transmission flow rates; and determining the above-mentioned correlation formula according to the above-mentioned relationship curve.

[0050] In actual operation, the above correlation formula is a linear function; according to the above relationship curve, the steps of determining the above correlation formula include: based on a preset historical gas transmission concentration range, intercepting the target point in the above relationship curve; fitting a straight line according to the above target point to obtain a straight line segment; according to the above straight line segment, determining the slope and intercept of the above linear function to obtain the correlation formula.

[0051] Here, in this embodiment, the gas transmission concentration is input as the independent variable of the linear function, and the filter material consumption rate is output as the dependent variable of the linear function.

[0052] In one embodiment, the step of fitting a straight line according to the target point to obtain a straight line segment includes: determining a line connecting two end points of the target point as a straight line segment.

[0053] Specifically, Figure 3 A schematic diagram of a correlation formula provided by an embodiment of the present invention.

[0054] Depend on Figure 3 As can be seen, the above historical gas transmission concentration range is [c min , c max ], for example, 0ppm≤historical gas transmission concentration≤660ppm. Other concentrations can also be used to divide the intervals. The line connecting the two endpoints of the above target point is determined as a straight line segment. That is, the straight line segment is the line segment corresponding to the above correlation formula.

[0055] Here, the expression of the above first correlation formula is V′=a×c+b.

[0056] Among them, a is the slope of the above straight line segment, b is the intercept of the above straight line segment, c is the above independent variable, and V′ is the above dependent variable.

[0057] Therefore, under the first correlation formula, when the gas transmission concentration through the filter is [c min , c max ] interval, the real-time filter material consumption can be calculated according to V′=a×c+b.

[0058] In a second embodiment, the historical gas transmission concentration interval includes multiple sub-intervals; based on the preset historical gas transmission concentration interval, the step of intercepting the target point in the relationship curve includes: based on the sub-interval, intercepting the target point in the relationship curve; fitting the target point to a straight line to obtain a straight line segment includes: connecting the endpoints of the target point corresponding to each of the sub-intervals to obtain multiple first straight line segments; according to the straight line segments, determining the slope and intercept of the linear function to obtain the correlation formula includes: according to the slope and intercept of each straight line segment, determining the slope and intercept of the linear function corresponding to each of the sub-intervals to obtain the correlation formula.

[0059] Specifically, Figure 4 A schematic diagram of another correlation formula provided by an embodiment of the present invention.

[0060] Depend on Figure 4 As can be seen, the above subinterval is [c min , c div ] and (c div , c max ], for example, the intervals of historical gas transmission concentration ≤ 330ppm and 330ppm<historical gas transmission concentration ≤ 660ppm. Other concentrations can also be used as dividing points, or divided into 3 or more intervals as needed. That is, the two straight line segments in the figure are the line segments corresponding to the above correlation formula.

[0061] Thus [c min , c div ] and [c div , c max ] are connected to the endpoints of the corresponding target points to obtain multiple first straight line segments; according to the slopes and intercepts of the above straight line segments, the slopes and intercepts of the above binary linear polynomials corresponding to each of the above sub-intervals are determined to obtain the correlation formula.

[0062] Furthermore, the expression of the second correlation formula is:

[0063] Where a1 is the above [c min , c div ] corresponds to the slope of the straight line segment, b1 is the above [c min , c div ] corresponds to the intercept of the straight line segment, a2 is the above (c div , c max ] corresponds to the slope of the straight line segment, b2 is the above (c div , c max ] corresponds to the intercept of the straight line segment.

[0064] Therefore, under the second correlation formula, when the gas transmission concentration through the filter is [c min , c div ] or (c div , c max ] interval, according to Calculate real-time filter material consumption.

[0065] Furthermore, Figure 5 A schematic diagram of a third correlation formula provided by an embodiment of the present invention.

[0066] Depend on Figure 5 As can be seen, the third correlation formula is obtained based on the following method: first, the historical gas transmission flow is divided according to the flow range to obtain the divided historical gas transmission flow. Then, fitting is performed based on the divided historical gas transmission flow to obtain the third correlation formula.

[0067] Among them, when the above historical gas transmission flow rate is greater than the commonly used flow rate range, the above third correlation formula is obtained by fitting the line connecting the two endpoints of the above target point as a straight line segment, that is, Figure 5 dotted line portion; when the above-mentioned historical gas transmission flow rate is less than or equal to the commonly used flow rate range, the endpoints of the target points corresponding to each of the above-mentioned sub-intervals are connected as described above to obtain multiple first straight line segments; according to the above-mentioned straight line segments, the slope and intercept of the above-mentioned linear function are determined to obtain the correlation formula, including: according to the slope and intercept of each straight line segment, the slope and intercept of the above-mentioned linear function corresponding to each of the above-mentioned sub-intervals are determined, and the correlation formula is obtained by fitting, and the above-mentioned third correlation formula is obtained, that is, Figure 5 The solid line part.

[0068] Furthermore, the expression of the third correlation formula is:

[0069]

[0070] Where f is the above historical gas transmission flow rate, f freq This is the commonly used flow range mentioned above.

[0071] Therefore, under the third correlation formula, when the gas transmission flow rate and gas transmission concentration through the filter are in different ranges, it can be calculated according to

[0072] Calculate real-time filter material consumption.

[0073] In a third embodiment, a first target point having the lowest historical filter material consumption rate and the lowest historical gas transmission concentration, and a plurality of second target points having the highest historical gas transmission concentration corresponding to different historical gas transmission flow rates are selected from the target points; a plurality of straight line segments are obtained based on the first target point and the plurality of second target points, for example Figure 7 As shown, straight line segments AB, AC, AD, AE, and AF are obtained; the slope of each of the multiple straight line segments is calculated; according to the slope of each straight line segment, a first relationship between the slope of the correlation formula and the historical gas transmission flow rate is obtained by fitting; the first relationship is substituted into the slope of the linear function to calculate the intercept of the linear function; and the correlation formula is obtained.

[0074] In this embodiment, the above correlation formula is V′=S(f)×c+B(f).

[0075] Among them, the above S(f) is the above first relationship, and B(f) is the relationship between the intercept and the historical gas transmission flow calculated based on the concentration corresponding to the first target point and the equivalent consumption rate data.

[0076] Specifically, Figure 6 A schematic diagram of a first relationship provided in an embodiment of the present invention.

[0077] In the fourth embodiment, after the step of drawing the relationship curve between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates, the method includes: fitting the constant terms in the relationship curve corresponding to different historical gas transmission flow rates and the historical gas transmission flow rates to obtain different constant term sequences; fitting the constant term sequence with the corresponding historical gas transmission flow rates to obtain a third relationship sequence; calculating the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration, including: determining the target constant term sequence corresponding to the gas transmission flow according to the gas transmission flow and the third relationship sequence; determining the target filter material consumption rate corresponding to the gas transmission flow according to the target constant term sequence and the relationship curve; calculating the filter material consumption of the filter according to the target filter material consumption rate.

[0078] In actual operation, the above-mentioned historical gas transmission flow rate and the constant term in the above-mentioned relationship curve corresponding to the above-mentioned historical gas transmission flow rate are fitted with a polynomial, exponential or hyperbola to obtain a third relationship sequence, and the above-mentioned third relationship sequence is expressed as V'(c) to obtain a constant term sequence corresponding to each flow rate, such as [a1(f1), a2(f1), a3(f1)...], [[a1(f2), a2(f2), a3(f2)...], etc.

[0079] Furthermore, each constant term sequence is used to plot the historical gas transmission flow rate to obtain a constant term flow graph. The curve is fitted, and the fitting method can be polynomial, exponential, hyperbola, etc. The constant term-flow curves obtained by fitting are A1(f), A2(f)...

[0080] Further, according to the above gas transmission flow rate, the above constant term flow curve is brought in to calculate the constant term sequence corresponding to the gas transmission flow rate. The constant term sequence is brought into the above V'(c) to obtain the complete filter material consumption rate corresponding to different gas transmission concentrations under the gas transmission flow rate. Further, the above gas transmission concentration is read to calculate the filter consumables consumption rate at this time.

[0081] Specifically, Figure 8 Schematic diagram of filter material consumption rate-gas transmission concentration curve provided in an embodiment of the present invention, V'(c) is fitted with multiple terms (power is 9), constant terms A1(f), A2(f), etc. are also fitted with multiple terms (power is 3), and V'(c) curve is obtained by substituting flow rate f=1.0slm.

[0082] In actual operation, when the gas transmission concentration is less than 1000ppm, the first embodiment or the second embodiment can be adopted, that is, the gas transmission concentration is small, and the corresponding filter material consumption rate does not change much with the gas transmission flow rate. When the gas transmission concentration is greater than 10ppm, the third embodiment can be adopted. That is, the greater the gas transmission concentration, the greater the change in the filter material consumption rate corresponding to different gas transmission flow rates. The fourth embodiment is applicable to any gas transmission concentration and any gas transmission flow rate.

[0083] Step S203: Calculating the filter material consumption of the filter according to the filter material consumption rate.

[0084] Step S204: determining the remaining life of the filter according to the filter material consumption and the total amount of filter material in the filter.

[0085] Furthermore, in this embodiment, the filter to which the filter remaining life monitoring method is applied is tested, and the test results are as follows:

[0086] Stage 1: Nitric oxide concentration 850ppm, flow rate 1.5slm, operating time 100h.

[0087] Stage 2: After the end of stage 1, the nitric oxide concentration was changed to 400ppm, the flow rate was changed to 0.8slm, and the operation continued.

[0088] Continuously monitor the concentration of nitrogen dioxide in the gas after passing through the filter to determine whether the filter has failed.

[0089] After phases one and two, the actual maximum usable time of the filter was measured to be 728 hours.

[0090] For filters of the same specifications, under the same test conditions, the remaining filter life monitoring was performed according to the method in the above embodiment. From the end of stage 1 to the alarm of insufficient filter life, the filter was used for a total of 576 hours. Adding the accumulated use of 100 hours in stage 1, the total filter usage time was 676 hours. Compared with the actual time, the filter consumable utilization rate was about 93%.

[0091] If the remaining life of the filter is monitored according to the maximum consumption rate method under various concentrations and flow rates, the filter will alarm that its life is insufficient when the cumulative use time is 149 hours, and the utilization rate of consumables is only 20%.

[0092] An embodiment of the present invention provides a method for monitoring the remaining life of a filter, comprising: obtaining the gas transmission flow and gas transmission concentration passing through the filter; calculating the filter material consumption rate based on a preset correlation formula between the filter material consumption rate and the gas transmission concentration according to the gas transmission concentration and the gas transmission flow; the correlation formula is constructed based on the correspondence between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates; calculating the filter material consumption of the filter according to the filter material consumption rate; determining the remaining life of the filter according to the filter material consumption and the total amount of filter material in the filter. This technology calculates the filter material consumption rate through the correlation formula constructed based on the correspondence between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates, and then obtains the remaining life of the filter, thereby increasing the accuracy of filter life assessment.

[0093] Example 3

[0094] Based on the above embodiments, Fig. 9 A schematic structural diagram of a filter remaining life monitoring device provided in an embodiment of the present invention.

[0095] Depend on Fig. 9 As can be seen, the filter remaining life monitoring device includes:

[0096] The data acquisition module 31 is used to acquire the gas transmission flow rate and gas transmission concentration through the filter.

[0097] The consumption calculation module 32 is used to calculate the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration.

[0098] The life monitoring module 33 is used to determine the remaining life of the filter according to the filter material consumption and the total amount of filter material in the filter.

[0099] The data acquisition module 31 , the consumption calculation module 32 and the life monitoring module 33 are connected in sequence.

[0100] In one embodiment, the consumption calculation module 32 is also used to calculate the filter material consumption rate based on a preset correlation formula between the filter material consumption rate and the gas transmission concentration, according to the above-mentioned gas transmission concentration and the above-mentioned gas transmission flow rate; the above-mentioned correlation formula is constructed based on the correspondence between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates; according to the above-mentioned filter material consumption rate, the filter material consumption of the above-mentioned filter is calculated.

[0101] In one embodiment, the consumption calculation module 32 is also used to obtain the above-mentioned historical gas transmission flow rate, the above-mentioned historical filter material consumption rate and the above-mentioned historical gas transmission concentration; draw a relationship curve between the above-mentioned historical filter material consumption rate and the above-mentioned historical gas transmission concentration under different above-mentioned historical gas transmission flow rates; and determine the above-mentioned correlation formula based on the above-mentioned relationship curve.

[0102] In one embodiment, the above correlation formula is a linear function; the consumption calculation module 32 is also used to intercept the target point in the above relationship curve based on a preset historical gas transmission concentration range; fit a straight line according to the above target point to obtain a straight line segment; according to the above straight line segment, determine the slope and intercept of the above linear function to obtain the correlation formula.

[0103] In one embodiment, the consumption calculation module 32 is further configured to determine the line connecting the two endpoints of the target point as a straight line segment.

[0104] In one embodiment, the historical gas transmission concentration interval includes multiple sub-intervals; the consumption calculation module 32 is also used to intercept the target point in the relationship curve based on the sub-interval; connect the endpoints of the target point corresponding to each of the sub-intervals to obtain multiple first straight line segments; determine the slope and intercept of the linear function corresponding to each of the sub-intervals according to the slope and intercept of each straight line segment to obtain the correlation formula.

[0105] In one embodiment, the consumption calculation module 32 is also used to select the first target point with the lowest historical filter material consumption rate and the lowest historical gas transmission concentration from the above-mentioned target points, as well as multiple second target points with the highest historical gas transmission concentration corresponding to different historical gas transmission flow rates; obtain multiple straight line segments based on the above-mentioned first target point and the above-mentioned multiple second target points; calculate the slope of each straight line segment in the above-mentioned multiple straight line segments; according to the slope of each straight line segment, fit the first relationship between the slope of the above-mentioned correlation formula and the above-mentioned historical gas transmission flow rate; substitute the above-mentioned first relationship into the slope of the above-mentioned linear function, and calculate the intercept of the above-mentioned linear function; and obtain the above-mentioned correlation formula.

[0106] In one embodiment, the consumption calculation module 32 is also used to fit the constant terms in the above-mentioned relationship curve corresponding to the above-mentioned historical gas transmission flow rates and the above-mentioned historical gas transmission flow rates to obtain different constant term sequences; fit the above-mentioned constant term sequence with the corresponding above-mentioned historical gas transmission flow rates to obtain a third relationship; determine the target constant term corresponding to the above-mentioned gas transmission flow rate based on the above-mentioned gas transmission flow rate and the above-mentioned third relationship; determine the target filter material consumption rate corresponding to the above-mentioned gas transmission flow rate based on the above-mentioned target constant term and the above-mentioned relationship curve; calculate the filter material consumption of the above-mentioned filter based on the above-mentioned target filter material consumption rate.

[0107] The filter remaining life monitoring device provided in the embodiment of the present invention has the same technical features as the filter remaining life monitoring method provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the device described above can refer to the corresponding process in the above method embodiment, and will not be repeated here.

[0108] Example 4

[0109] This embodiment provides a filter, including a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the steps of the filter remaining life monitoring method.

[0110] See also Fig.10 The structure diagram of a filter shown in the figure comprises: a memory 41 and a processor 42. The memory 41 stores a computer program that can be run on the processor 42. When the processor executes the computer program, the steps provided by the above-mentioned filter remaining life monitoring method are implemented.

[0111] like Fig.10As shown, the device further includes: a bus 43 and a communication interface 44, a processor 42, a communication interface 44 and a memory 41 are connected via the bus 43; the processor 42 is used to execute executable modules stored in the memory 41, such as computer programs.

[0112] The memory 41 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 44 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0113] The bus 43 may be an ISA bus, a PCI bus, or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.10 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0114] Among them, the memory 41 is used to store the program, and the processor 42 executes the program after receiving the execution instruction. The method performed by the filter remaining life monitoring device disclosed in any embodiment of the present invention can be applied to the processor 42, or implemented by the processor 42. The processor 42 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 42. The above processor 42 can be a general processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 41, and the processor 42 reads the information in the memory 41 and completes the steps of the above method in combination with its hardware.

[0115] Furthermore, an embodiment of the present invention also provides a machine-readable storage medium, which stores machine-executable instructions. When the machine-executable instructions are called and executed by the processor 42, the machine-executable instructions prompt the processor 42 to implement the above-mentioned filter remaining life monitoring method.

[0116] The filter and computer-readable storage medium provided in the embodiments of the present invention have the same technical features, and therefore can solve the same technical problems and achieve the same technical effects.

[0117] Example 5

[0118] On the basis of the above embodiment, an embodiment of the present invention further provides a medical device, which further includes a therapeutic gas transmission device connected to the filter in the above embodiment.

[0119] Among them, the above-mentioned therapeutic gas transmission device includes: a therapeutic gas preparation unit, a parameter information acquisition unit, a therapeutic gas output end and a display module connected in sequence; the above-mentioned therapeutic gas preparation unit is used to prepare the therapeutic gas, and input the above-mentioned therapeutic gas into the above-mentioned filter for filtering; the above-mentioned parameter information acquisition unit is used to obtain the gas transmission flow and gas transmission concentration of the therapeutic gas after filtering by the above-mentioned filter; the above-mentioned therapeutic gas output end is used to output the above-mentioned filtered therapeutic gas; the above-mentioned display module is used to display the remaining life of the above-mentioned filter.

[0120] The medical device provided in the embodiment of the present invention has the same technical features as the above-mentioned filter embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0121] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0122] Finally, it should be noted that the above-mentioned embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed by the present invention, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A method for monitoring the remaining life of a filter, characterized in that: include: obtaining the gas transmission flow rate and gas transmission concentration through the filter; Calculating the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration; The remaining life of the filter is determined based on the filter material consumption and the total amount of filter material in the filter.

2. The filter remaining life monitoring method according to claim 1, characterized in that: The step of calculating the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration comprises: Based on a preset correlation formula between filter material consumption rate and gas transmission concentration, the filter material consumption rate is calculated according to the gas transmission concentration and the gas transmission flow rate; the correlation formula is constructed based on the correspondence between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates; The filter material consumption of the filter is calculated according to the filter material consumption rate.

3. The filter remaining life monitoring method according to claim 2, characterized in that: Before the step of calculating the filter material consumption rate according to the gas transmission concentration based on a preset correlation formula between the filter material consumption rate and the gas transmission concentration, the method includes: Obtaining the historical gas transmission flow rate, the historical filter material consumption rate, and the historical gas transmission concentration; Draw a relationship curve between the historical filter material consumption rate and the historical gas transmission concentration under different historical gas transmission flow rates; The correlation formula is determined according to the relationship curve.

4. The filter remaining life monitoring method according to claim 3, characterized in that: The correlation formula is a linear function; The step of determining the correlation formula according to the relationship curve comprises: Based on a preset historical gas transmission concentration interval, intercepting a target point in the relationship curve; Fitting a straight line according to the target point to obtain a straight line segment; According to the straight line segment, the slope and intercept of the linear function are determined to obtain a correlation formula.

5. The filter remaining life monitoring method according to claim 4, characterized in that: The step of fitting a straight line according to the target point to obtain a straight line segment comprises: The line connecting the two endpoints of the target point is determined as a straight line segment.

6. The filter remaining life monitoring method according to claim 4, characterized in that: The historical gas transmission concentration interval includes a plurality of sub-intervals; The step of intercepting a target point in the relationship curve based on a preset historical gas transmission concentration interval includes: Based on the subinterval, intercepting a target point in the relationship curve; The step of fitting the target point to a straight line to obtain a straight line segment comprises: connecting the endpoints of the target point corresponding to each of the sub-intervals to obtain a plurality of first straight line segments; The step of determining the slope and intercept of the linear function according to the straight line segment to obtain a correlation formula includes: According to the slope and intercept of each straight line segment, the slope and intercept of the linear function corresponding to each sub-interval are determined to obtain a correlation formula.

7. The filter remaining life monitoring method according to claim 4, characterized in that: The step of determining the correlation formula according to the relationship curve comprises: Select from the target points a first target point having the lowest historical filter material consumption rate and the lowest historical gas transmission concentration, and a plurality of second target points having the highest historical gas transmission concentration corresponding to different historical gas transmission flow rates; Obtaining a plurality of straight line segments according to the first target point and the plurality of second target points; Calculating the slope of each of the plurality of straight line segments; According to the slope of each straight line segment, a first relationship between the slope of the correlation formula and the historical gas transmission flow rate is obtained by fitting; Substituting the first relationship into the slope of the linear function, and calculating the intercept of the linear function; The correlation formula is obtained.

8. The filter remaining life monitoring method according to claim 3, characterized in that: After the step of drawing a relationship curve between the historical filter material consumption rate and the historical gas transmission concentration at different historical gas transmission flow rates, the method includes: Fitting different historical gas transmission flow rates and constant terms in the relationship curve corresponding to the historical gas transmission flow rates to obtain different constant term sequences; Fitting the constant term sequence with the corresponding historical gas transmission flow rate to obtain a third relationship sequence; The step of calculating the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration comprises: Determining a target constant term sequence corresponding to the gas transmission flow rate according to the gas transmission flow rate and the third relationship sequence; Determining a target filter material consumption rate corresponding to the gas transmission flow rate according to the target constant term sequence and the relationship curve; The filter material consumption of the filter is calculated according to the target filter material consumption rate.

9. A filter remaining life monitoring device, characterized in that: include: A data acquisition module, used to acquire the gas transmission flow rate and gas transmission concentration through the filter; A consumption calculation module, used to calculate the filter material consumption of the filter according to the gas transmission flow rate and the gas transmission concentration; The life monitoring module is used to determine the remaining life of the filter according to the filter material consumption and the total amount of filter material in the filter.

10. A filter, characterized in that: The filter comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the filter remaining life monitoring method according to any one of claims 1 to 8.

11. A medical device, characterized in that: The medical device further comprises a therapeutic gas transmission device connected to the filter in claim 10; the therapeutic gas transmission device comprises: a therapeutic gas preparation unit, a parameter information acquisition unit, a therapeutic gas output terminal and a display module connected in sequence; The therapeutic gas preparation unit is used to prepare therapeutic gas and input the therapeutic gas into the filter for filtering; The parameter information acquisition unit is used to acquire the gas transmission flow rate and gas transmission concentration of the therapeutic gas after being filtered by the filter; The therapeutic gas output end is used to output the filtered therapeutic gas; The display module is used to display the remaining life of the filter.

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