Method and system for humidifying and heating adjustment of breathing machine and breathing machine

Abstract

A method and system for humidifying and heating adjustment of a breathing machine and a breathing machine. The method comprises: calculating a temperature quantized value of a heating bottom plate of a humidifier according to an environmental temperature, an environmental humidity, and a real-time flow; using a preset code to determine a humidification level of the humidifier; calculating a heating power quantized value of a heating pipeline according to the real-time flow and the environmental temperature; and using a preset code to determine a heating level of the heating pipeline. According to the method and system for humidifying and heating adjustment and the breathing machine, installation of a sensor at a tail end of the heating pipeline is not required, thereby reducing production costs; the temperature and humidity of the air output by the breathing machine can be automatically adjusted according to different conditions, enabling the breathing machine to better adapt to environmental changes; the breathing machine can also be used when not connected to the heating pipeline, thereby saving costs for a user.

Description

A humidification and heating adjustment method and system for a ventilator and a ventilator

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311591286.0, entitled “A humidification and heating adjustment method, system and ventilator for a ventilator”, filed on November 27, 2023, and is hereby incorporated by reference into this application. Technical Field

[0003] The present invention belongs to the field of ventilators, and in particular relates to a humidification and heating adjustment method and system for a ventilator, and the ventilator. Background Art

[0004] The humidification output of a ventilator has temperature and humidity requirements. Humidification output that does not meet these requirements can cause harm to the user. A humidifier can ensure that the humidification output meets these requirements. Currently, most ventilators use manual humidification level settings. When the treatment environment, such as humidity, temperature, and real-time flow rate, changes, the humidification level needs to be readjusted. This is not only cumbersome, but if environmental changes are not detected in time, the humidification output may not meet the requirements for a long time, causing harm to the user.

[0005] In order to solve the above technical problems, the existing technical solution is: configure a heating circuit for the ventilator, and set a temperature sensor or a temperature and humidity sensor at the mask end (terminal) of the heating circuit. For heating circuits with temperature and humidity sensors, set fixed temperature and humidity target values. When environmental changes cause errors between the actual value and the target value, the sensor obtains the actual temperature and humidity values ​​in real time, and automatically adjusts the humidification level of the humidifier and the heating level of the heating circuit according to the error, so that the humidification output is stable at the target temperature and humidity. For heating circuits with only temperature sensors, the relationship between the input variables, the temperature at the end of the heating circuit and the humidification output is fitted based on actual data. By controlling the temperature at the end of the heating circuit, indirect control of the humidification output is achieved.

[0006] Existing solutions rely on sensors at the end of the heating line to achieve automatic humidification and heating. To prevent condensation caused by low ambient temperatures, heating lines are typically used only during low-temperature treatments. Without these sensors, automatic humidification and heating control is impossible. Furthermore, the sensors at the end of the heating line increase costs, and users who don't require the optional heating line cannot use the automatic humidification and heating function.

[0007] Summary of the Invention

[0008] The purpose of the present invention is to overcome the defect that the existing ventilator needs to add a terminal sensor in order to automatically control humidification and heating, which increases the production cost.

[0009] In order to achieve the above object, the present invention proposes a humidification and heating adjustment method for a ventilator, comprising:

[0010] Calculate the temperature quantification value of the humidifier heating base plate according to the ambient temperature, ambient humidity and real-time flow rate; set the humidifier humidification level using the preset code;

[0011] Calculate the quantitative value of the heating power of the heating pipeline according to the real-time flow rate and ambient temperature; use the preset code to set the heating level of the heating pipeline.

[0012] As an improvement to the above method, the temperature quantization value calculation method of the heating base plate is: T hum =A1Q sensor +B1T env +C1Hum env +D1H t +E1

[0013] Among them, T hum Indicates the target temperature value of the humidifier heating base; Q sensor Indicates real-time flow; A1 indicates humidifier flow coefficient; T env Indicates ambient temperature; B1 indicates humidifier temperature coefficient; Hum env Indicates ambient humidity; C1 indicates the humidity coefficient of the humidifier; H t Indicates the humidification amount; D1 indicates the humidification amount coefficient; E1 indicates the humidifier temperature correction coefficient.

[0014] As an improvement to the above method, the method for determining the humidifier flow coefficient A1, the humidifier temperature coefficient B1, the humidifier humidity coefficient C1 and the humidification amount coefficient D1 is:

[0015] The ventilator was operated under different ambient temperatures and ambient humidity, and the ventilator flow rate and the temperature setting value of the humidifier heating base were adjusted respectively. The humidification amount of the ventilator was measured at each heating base temperature value, and the ambient temperature, ambient humidity, real-time flow rate, heating base temperature and humidification amount were recorded.

[0016] After multiple testing processes, data fitting was performed based on the temperature quantization value calculation formula of the heating base plate to obtain the values ​​of A1, B1, C1, D1, and E1.

[0017] As an improvement to the above method, the calculation method of the quantitative value of the heating power of the heating pipeline is: Tube =A2Q sensor +B2T env +E2

[0018] Among them, P Tube Indicates the target power of the heating pipeline; Q sensor Indicates real-time flow; A2 indicates the flow coefficient of the heating pipeline; T env Indicates ambient temperature; B2 indicates the temperature coefficient of the heating pipe; E2 indicates the power correction coefficient of the heating pipe.

[0019] As an improvement to the above method, the method for determining the heating pipeline flow coefficient A2, the heating pipeline temperature coefficient B2 and the heating pipeline power correction coefficient E2 is as follows:

[0020] Under different ambient temperatures and real-time flow rates, test the minimum heating level required to prevent condensation in the ventilator tubing. Record the ambient temperature, real-time flow rate, and heating level during the test.

[0021] After multiple tests, data fitting was performed based on the calculation method for the quantitative value of the heating power of the heating pipeline to obtain the values ​​of A2, B2, and E2.

[0022] As an improvement to the above method, the data fitting method is a least squares method, a Lagrange interpolation method, a Newton interpolation method or a fitting algorithm based on a support vector machine.

[0023] As an improvement to the above method, the method further comprises:

[0024] Before setting the heated circuit heat level, turn off the circuit heating function when the ventilator is not connected to the heated circuit.

[0025] As an improvement to the above method, the method further comprises:

[0026] When the humidification and heating function is not enabled, manually set the humidifier humidification level and heating level of the heating pipe.

[0027] The present invention also provides a humidification and heating regulation system for a ventilator, which is implemented based on the above method, and the system includes:

[0028] A humidifier humidification level adjustment module is used to calculate the temperature quantization value of the humidifier heating base plate according to the ambient temperature, ambient humidity and real-time flow rate; and determine the humidification level of the humidifier using a preset code; and

[0029] The heating level adjustment module of the heating pipeline is used to calculate the quantitative value of the heating power of the heating pipeline according to the real-time flow rate and ambient temperature; and determine the heating level of the heating pipeline using a preset code.

[0030] The present invention also provides a ventilator, which is implemented based on the above-mentioned humidification and heating regulation system.

[0031] Compared with the prior art, the advantages of the present invention are:

[0032] 1. The intelligent humidification and heating method provided by the present invention does not require the installation of a sensor at the end of the heating pipeline, thereby reducing production costs;

[0033] 2. The present invention fits the correlation between humidification and heating and ambient temperature and humidity based on historical data, and can automatically adjust the temperature and humidity of the ventilator's output air according to different situations, making the ventilator more adaptable to environmental changes;

[0034] 3. The intelligent humidification and heating method provided by the present invention can also be used when the heating pipeline is not connected, which saves costs for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 shows a flow chart of a humidification and heating adjustment method for a ventilator. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0037] The present invention provides a humidification and heating adjustment method, system, and ventilator for a ventilator. The humidification and heating algorithm provided by this method can automatically adjust the humidification level of the humidifier and the heating level of the heating line based on ambient temperature, humidity, and real-time flow rate. The ventilator provided by the present invention does not require a sensor at the end of the heating line, reducing costs. Furthermore, the intelligent humidification and heating function can be achieved even without connecting the heating line, eliminating the need for users to select a heating line solely for the intelligent humidification and heating function.

[0038] When the ventilator is running, the ambient temperature, ambient humidity and real-time flow rate are obtained in real time (real-time flow rate refers to the flow rate value measured in real time by the ventilator flow sensor. It measures the air flow rate inhaled by the ventilator air inlet, not just the oxygen supply flow rate). During ventilator treatment, it is determined whether the intelligent humidification and heating function is turned on. If not, the ventilator adjusts the humidifier and heating pipeline according to the manual setting value. If it is turned on, the temperature quantization value of the humidifier heating base is calculated according to the intelligent humidification and heating algorithm, and the humidification level of the humidifier is determined by the preset code. The specific algorithm is: T hum =A1Q sensor +B1T env +C1Hum env +D1H t +E1 (1)

[0039] Among them, T hum The target temperature value for the humidifier heating base plate; Q sensor is the real-time flow rate; A1 is the humidifier flow coefficient; T env is the ambient temperature; B1 is the humidifier temperature coefficient; Hum envis the ambient humidity; C1 is the humidity coefficient of the humidifier; H t is the humidification amount; D1 is the humidification coefficient; E1 is the humidifier temperature correction coefficient.

[0040] During ventilator treatment, it is determined whether the heating pipeline is connected. If the heating pipeline is not connected, the pipeline heating is turned off. If the heating pipeline is connected, the heating power quantitative value of the heating pipeline is calculated according to the intelligent humidification and heating algorithm, and then the heating level of the heating pipeline is determined according to the preset code. The specific algorithm is: P Tube =A2Q sensor +B2T env +E2 (2)

[0041] Among them, P Tube is the target power of the heating pipeline; Q sensor is the real-time flow rate; A2 is the flow coefficient of the heating pipeline; T env is the ambient temperature; B2 is the heating pipe temperature coefficient; E2 is the heating pipe power correction coefficient.

[0042] The coefficients of the intelligent humidification and heating algorithm described above are determined or modified based on system conditions. Here, a method for determining the algorithm coefficients is provided; this method is not limited to this one. The ventilator was operated at different ambient temperatures and humidities. The ventilator flow rate was set to a fixed value. The humidifier heating base temperature setting was adjusted individually, and the humidification output was measured at each heating base temperature. The flow rate was then varied, and the humidifier heating base temperature was adjusted again, and the humidification output was measured. This test was repeated a certain number of times. During the test, parameters such as ambient temperature, humidity, real-time flow rate, heating base temperature, and humidification output were recorded. Data fitting was performed using the intelligent humidification algorithm to determine the specific values ​​of A1, B1, C1, D1, and E1. The minimum heating level required to prevent condensation in the ventilator tubing was tested at different ambient temperatures and real-time flow rates. The ambient temperature, real-time flow rate, and heating level were recorded during the test. Data fitting was performed using the intelligent humidification algorithm to determine the specific values ​​of A2, B2, and E2. The data fitting method can adopt the least square method, Lagrange interpolation method, Newton interpolation method or fitting algorithm based on support vector machine, etc.

[0043] As shown in Figure 1, the process of intelligently adjusting the temperature and humidity of the ventilator includes: the ventilator obtains the ambient temperature, ambient humidity and real-time flow in real time. If the intelligent humidification and heating function is turned on, the target humidification amount, ambient temperature, ambient humidity and real-time flow of the ventilator are substituted into formula (1) to calculate the temperature of the heating base plate (humidification level), and the ventilator controls the heating base plate to reach the temperature value solved by the algorithm formula. The ambient temperature and real-time flow are substituted into formula (2) to calculate the heating level of the heating pipeline, and the ventilator controls the heating pipeline to reach the heating level calculated by the algorithm formula. When the intelligent humidification and heating algorithm is not used, the humidification level and heating pipeline level of the ventilator need to be manually set by the user. When the level setting is unreasonable, the humidification output of the ventilator cannot reach the set value, and even condensation water will appear in the pipeline. When the intelligent humidification and heating algorithm is used, the ventilator automatically adjusts the humidifier level and heating pipeline level to achieve the set humidification output and avoid condensation water in the pipeline.

[0044] The present invention also provides a humidification and heating regulation system for a ventilator, which is implemented based on the above method, and the system includes:

[0045] A humidifier humidification level adjustment module is used to calculate the temperature quantization value of the humidifier heating base plate according to the ambient temperature, ambient humidity and real-time flow rate; and determine the humidification level of the humidifier using a preset code; and

[0046] The heating level adjustment module of the heating pipeline is used to calculate the quantitative value of the heating power of the heating pipeline according to the real-time flow rate and ambient temperature; and determine the heating level of the heating pipeline using a preset code.

[0047] The present invention also provides a ventilator, which is implemented based on the above-mentioned humidification and heating regulation system.

[0048] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A humidification and heating adjustment method for a ventilator, comprising: Calculate the temperature quantification value of the humidifier heating bottom plate according to the ambient temperature, ambient humidity and real-time flow rate; Set the humidifier humidity level using preset codes; Calculate the heating power quantitative value of the heating pipeline according to the real-time flow rate and ambient temperature; Use the preset codes to set the heating level for the heated circuits.

2. The humidification and heating adjustment method of a ventilator according to claim 1, characterized in that: The temperature quantization value calculation method of the heating bottom plate is: T hum =A1Q sensor +B1T env +C1Hum env +D1H t +E1 Among them, T hum Indicates the target temperature value of the humidifier heating base plate; Q sensor represents the real-time flow rate; A1 represents the humidifier flow coefficient; T env Indicates ambient temperature; B1 indicates humidifier temperature coefficient; Hum env Indicates ambient humidity; C1 indicates the humidity coefficient of the humidifier; H t It represents the humidification amount; D1 represents the humidification amount coefficient; E1 represents the humidifier temperature correction coefficient.

3. The humidification and heating adjustment method of a ventilator according to claim 2, characterized in that: The method for determining the humidifier flow coefficient A1, the humidifier temperature coefficient B1, the humidifier humidity coefficient C1 and the humidification amount coefficient D1 is: The ventilator is operated under different ambient temperatures and ambient humidity, and the flow value of the ventilator and the temperature setting value of the humidifier heating base are adjusted respectively. The humidification amount of the ventilator is measured at each heating base temperature value, and the ambient temperature, ambient humidity, real-time flow, heating base temperature and humidification amount are recorded; After multiple testing processes, data fitting was performed based on the temperature quantization value calculation formula of the heating base plate to obtain the values ​​of A1, B1, C1, D1, and E1.

4. The humidification and heating adjustment method of a ventilator according to claim 1, characterized in that: The calculation method of the quantitative value of the heating power of the heating pipeline is: Tube =A2Q sensor +B2T env +E2 Among them, P Tube Indicates the target power of the heating circuit; Q sensor Indicates real-time flow; A2 indicates heating pipeline flow coefficient; T env Indicates ambient temperature; B2 indicates heating pipe temperature coefficient; E2 indicates heating pipe power correction coefficient.

5. The humidification and heating adjustment method of a ventilator according to claim 4, characterized in that: The method for determining the heating pipeline flow coefficient A2, the heating pipeline temperature coefficient B2 and the heating pipeline power correction coefficient E2 is: Test the minimum heating required to prevent condensation in the ventilator circuit at different ambient temperatures and real-time flow rates Pipeline level: record ambient temperature, real-time flow rate and heating pipeline level during the test; After multiple testing processes, data fitting was performed based on the calculation method for the quantitative value of the heating power of the heating pipeline to obtain the values ​​of A2, B2, and E2.

6. The humidification and heating adjustment method for a ventilator according to claim 3 or 5, characterized in that: The data fitting method is the least square method, Lagrange interpolation method, Newton interpolation method or a fitting algorithm based on a support vector machine.

7. The humidification and heating adjustment method of a ventilator according to claim 1, characterized in that: The method further comprises: Before setting the heated circuit heat level, turn off the circuit heating function when the ventilator is not connected to the heated circuit.

8. The humidification and heating adjustment method of a ventilator according to claim 1, characterized in that: The method further comprises: When the humidification and heating function is not turned on, manually set the humidifier humidification level and the heating level of the heating pipeline.

9. A humidification and heating regulation system for a ventilator, implemented based on any of the methods described in claims 1-8, characterized in that: The system comprises: A humidifier humidification level adjustment module is used to calculate the temperature quantization value of the humidifier heating base plate according to the ambient temperature, ambient humidity and real-time flow rate; determine the humidification level of the humidifier using a preset code; and The heating level adjustment module of the heating pipeline is used to calculate the quantitative value of the heating power of the heating pipeline according to the real-time flow rate and the ambient temperature; and determine the heating level of the heating pipeline using a preset code.

10. A ventilator, characterized in that: This is achieved based on the humidification and heating regulation system described in claim 9.

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