CN113304367B - Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same - Google Patents

Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same Download PDF

Info

Publication number
CN113304367B
CN113304367B CN202110614584.1A CN202110614584A CN113304367B CN 113304367 B CN113304367 B CN 113304367B CN 202110614584 A CN202110614584 A CN 202110614584A CN 113304367 B CN113304367 B CN 113304367B
Authority
CN
China
Prior art keywords
temperature
humidity
dew point
target
point temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110614584.1A
Other languages
Chinese (zh)
Other versions
CN113304367A (en
Inventor
陈超
邓武雄
陈娟
黎银波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Beyond Medical Technology Co ltd
Original Assignee
Hunan Beyond Medical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Beyond Medical Technology Co ltd filed Critical Hunan Beyond Medical Technology Co ltd
Priority to CN202110614584.1A priority Critical patent/CN113304367B/en
Publication of CN113304367A publication Critical patent/CN113304367A/en
Application granted granted Critical
Publication of CN113304367B publication Critical patent/CN113304367B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/1095—Preparation of respiratory gases or vapours by influencing the temperature in the connecting tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • A61M16/161—Devices to humidify the respiration air with means for measuring the humidity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3653—General characteristics of the apparatus related to heating or cooling by Joule effect, i.e. electric resistance

Abstract

The embodiment of the invention discloses a temperature and humidity adjusting method and a high-flow respiratory humidification therapeutic apparatus applied by the same, wherein a fan and a heating plate are both arranged in an apparatus main machine, a water tank is arranged in a heating zone of the heating plate, the water outlet end of the water tank is connected with the air inlet end of a respiratory tube through a bent tube, and a heating wire is arranged in the tube wall of the respiratory tube; temperature and humidity sensors are arranged in the air inlet end of the fan, the air outlet end of the breathing tube and the elbow, and the data ends of the temperature and humidity sensors are connected with the instrument host; the instrument host is used for adjusting the heating power of the heating plate and the heating wire according to temperature and humidity data acquired by the temperature and humidity sensor. Through the humidity and the temperature of real-time detection return bend and respiratory tube to through the data of feedback and the humiture automatically regulated hot plate of environment and the heating power of heater strip, accurately output humidity and the temperature of setting for, reduce the pipeline condensate water of return bend and respiratory tube, the effectual output of control amount of humidifying reduces the consumption.

Description

Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same
Technical Field
The invention relates to the field of medical instruments, in particular to a temperature and humidity adjusting method and a high-flow respiratory humidification therapeutic apparatus using the same.
Background
When the high-flow respiratory humidification therapeutic apparatus works, water in the water tank is heated through the heating plate to form water vapor according to the flow and the temperature value set by a user, and the gas passing through the respiratory pipeline is heated, so that the heating humidification effect is achieved. For household high flow respiratory humidification therapy apparatus, the humidification capability is an important performance index.
In the whole using process, if the humidifying capacity is insufficient, the using effect of the high-flow respiratory humidification therapeutic apparatus can be influenced, and the mouth and the tongue of a user can be dried, so that the discomfort of the user is caused. If the humidification is excessive, the water condensation of the elbow and the breathing tube can be caused, the discomfort of the user can be caused, and other potential safety hazards can also be caused. Therefore, one of the important criteria for judging the domestic high-flow respiratory-humidification therapeutic apparatus is proper humidification capability.
However, in actual use, the detection of the ambient temperature and the ambient humidity is not generally performed. If the humidity of environment is very high originally, or compliance can be relatively poor when ambient temperature is very low, then the too big phenomenon of humidifying volume appears easily to produce a large amount of condensation, the phenomenon that the user will have the comdenstion water blowout or block up breathing pipe when using, thereby influence the use.
The existing high-flow respiratory humidification therapeutic apparatus mainly has the following problems: the heating plate has higher power, can realize rapid heating and reach a required temperature threshold, thus causing the water in the water tank to be heated too fast, and the heating speed of the heating pipeline cannot keep up with the speed of the water vapor entering the pipeline, thereby causing the water vapor to be condensed; the temperature and humidity sensor is arranged on the inner wall of the pipeline and is greatly influenced by the temperature of the pipe wall, so that the detection result is easy to be inaccurate, and the whole control system is influenced; once condensed water is immersed into the temperature and humidity sensor on the pipe wall, short circuit is caused, and potential safety hazards are caused.
Disclosure of Invention
Aiming at the problems, the invention provides a temperature and humidity adjusting method and a high-flow respiratory humidification therapeutic apparatus using the same. The specific scheme is as follows:
in a first aspect, an embodiment of the present disclosure provides a high flow respiratory humidification therapy apparatus, which includes an apparatus main machine, a fan, a breathing pipe, a water tank, a bent pipe, a heating plate, a heating wire, and a plurality of temperature and humidity sensors;
the fan and the heating plate are arranged in the instrument host, the water tank is arranged in a heating area of the heating plate, the water outlet end of the water tank is connected with the air inlet end of the breathing pipe through the bent pipe, and heating wires are arranged in the pipe wall of the breathing pipe;
temperature and humidity sensors are arranged in the air inlet end of the fan, the air outlet end of the breathing tube and the bent tube, and data ends of the temperature and humidity sensors are connected with the instrument host;
the instrument host is used for adjusting the heating power of the heating plate and the heating wire according to temperature and humidity data acquired by the temperature and humidity sensor.
According to a specific embodiment of this disclosure, temperature and humidity sensor passes through adapting unit and hangs in the return bend, and temperature and humidity sensor does not laminate the inner wall setting of return bend.
According to a specific embodiment of this disclosure, high flow respiratory humidification therapeutic instrument still includes adjusting panel, adjusting panel includes input/output module and display, input/output module with the display all with the instrument host computer is connected.
According to a specific embodiment of the present disclosure, the connection member is a circuit board, and a surface of the circuit board is coated with a waterproof material.
In a second aspect, an embodiment of the present disclosure further provides a temperature and humidity adjusting method, where the method includes:
receiving set humidity and set temperature input by a user;
collecting the temperature and humidity of the air inlet end of the fan, the inside of the bent pipe and the air outlet end of the breathing pipe in real time;
calculating a first target dew point temperature and a first target absolute humidity in the elbow according to the temperature and humidity, the set temperature and the set humidity of the air inlet end of the fan;
calculating a second target dew point temperature and a second target absolute humidity in the breathing pipe according to the temperature and humidity, the set temperature and the set humidity of the air inlet end of the fan;
calculating absolute humidity and dew point temperature in the elbow according to the temperature and humidity of the air inlet end of the fan and the temperature and humidity in the elbow;
calculating dew point temperature and absolute humidity in the breathing tube according to the temperature and humidity of the air inlet end of the fan and the temperature and humidity of the air outlet end of the breathing tube;
and carrying out closed-loop control on the heating power of the heating plate and the heating wire according to the first target dew point temperature, the first target absolute humidity, the second target dew point temperature, the second target absolute humidity, the dew point temperature and the absolute humidity in the bent pipe and the breathing pipe.
According to an embodiment of the present disclosure, the step of performing closed-loop control on the heating power of the heating plate and the heating wire according to the first target dew point temperature, the first target absolute humidity, the second target dew point temperature, the second target absolute humidity, and the dew point temperature and the absolute humidity in the elbow and the breathing tube includes:
performing closed-loop control on the heating power of the heating plate according to the absolute humidity, the dew point temperature, the first target dew point temperature and the first target absolute humidity in the bent pipe;
and carrying out closed-loop control on the heating power of the heating wires and the heating plate according to the dew point temperature and the absolute humidity in the breathing pipe, the second target dew point temperature and the second target absolute humidity.
According to an embodiment of the present disclosure, the step of performing closed-loop control on the heating power of the heating plate according to the absolute humidity in the elbow, the dew point temperature, the first target dew point temperature, and the first target absolute humidity includes:
if the absolute humidity in the bent pipe does not reach the first target absolute humidity and the dew point temperature in the bent pipe does not reach the first target dew point temperature, adjusting the heating power of the heating plate to increase in real time;
if the absolute humidity in the bent pipe exceeds the first target absolute humidity and the dew point temperature in the bent pipe exceeds the first target dew point temperature, the heating power of the heating plate is adjusted in real time to be reduced;
the step of "according to dew point temperature and absolute humidity in the breathing pipe, second target dew point temperature and second target absolute humidity, carry out closed loop control to the heating power of heater strip and hot plate" includes:
if the absolute humidity in the breathing pipe does not reach the second target absolute humidity and the dew point temperature in the breathing pipe does not reach the second target dew point temperature, adjusting the heating power of the heating wires and the heating plate to increase in real time;
and if the absolute humidity in the breathing pipe exceeds the second target absolute humidity and the dew point temperature in the breathing pipe exceeds the second target dew point temperature, adjusting the heating power of the heating wires and the heating plate in real time and reducing the heating power.
According to a specific embodiment of the present disclosure, the calculation method of the dew point temperature is:
Figure BDA0003097558190000041
wherein, T d Dew point temperature, a and b are constants, t is temperature, and f is humidity.
According to a specific embodiment of the present disclosure, the method for calculating the absolute humidity includes:
Figure BDA0003097558190000042
where ρ is w Absolute humidity, a, c are constants, t is temperature, f is humidity, E 0 Is the saturated vapor pressure of water at 0 ℃, R w The gas constant of water.
According to one embodiment of the present disclosure, a has a value of 7.5, b has a value of 237.3, and c has a value of 237.7.
According to the temperature and humidity adjusting method and the high-flow respiratory humidification therapeutic apparatus applying the same disclosed by the embodiment of the invention, the fan and the heating plate are both arranged in the main machine of the apparatus, the water tank is arranged in the heating area of the heating plate, the water outlet end of the water tank is connected with the air inlet end of the respiratory tube through the bent tube, and the heating wire is arranged in the tube wall of the respiratory tube; temperature and humidity sensors are arranged in the air inlet end of the fan, the air outlet end of the breathing tube and the elbow, and the data ends of the temperature and humidity sensors are connected with the instrument host; the instrument host is used for adjusting the heating power of the heating plate and the heating wire according to temperature and humidity data acquired by the temperature and humidity sensor. Through the humidity and the temperature of real-time detection return bend and respiratory tube to through the data of feedback and the humiture automatically regulated hot plate of environment and the heating power of heater strip, accurately output humidity and the temperature of setting for, reduce return bend and respiratory tube pipeline condensate water, the output of effectual control is wetted volume and is reduced the consumption.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
FIG. 1 is a schematic diagram illustrating a high flow respiratory humidification therapy apparatus according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram illustrating a portion of a high flow respiratory humidification therapy apparatus according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a portion of a high flow respiratory humidification therapy apparatus according to an embodiment of the present disclosure;
fig. 4 shows a schematic flow chart of a temperature and humidity adjusting method provided by the embodiment of the disclosure;
fig. 5 shows an overall frame diagram of a temperature and humidity adjustment method provided in the embodiment of the present disclosure;
fig. 6 is a partial frame diagram illustrating a temperature and humidity adjusting method according to an embodiment of the disclosure;
fig. 7 is a partial frame diagram illustrating a temperature and humidity adjusting method according to an embodiment of the disclosure.
Summary of reference numerals:
100-high flow respiratory humidification therapy apparatus; 101-an instrument host; 102-a fan; 103-a breathing tube; 104-a water tank; 105-bending the tube; 106-a heating plate; 107-adjustment panel; 108-a temperature and humidity sensor; 109-connecting part.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Fig. 1 is a schematic structural view of a high flow respiratory humidification therapy apparatus according to an embodiment of the present disclosure. As shown in fig. 1, the high flow respiratory humidification therapy apparatus 100 includes an apparatus main body 101, a blower 102, a breathing tube 103, a water tank 104, an elbow 105, a heating plate 106, a heating wire (not shown in the figure) and a plurality of temperature and humidity sensors 108;
in particular, the high flow respiratory humidification therapy device 100 may further include other components, such as an oxygen connection tube, a filter cotton, and other inherent components, which are not listed herein.
In specific implementation, the blower 102 is used for conveying outside air into the water tank 104, and the breathing tube 103 is used for conveying heated and humidified gas into a human body. The water tank 104 is filled with sterile distilled water, and after being heated by the heating plate 106, the water vapor is sent into the breathing tube 103 through the bent tube 105. The heating wire is used for heating the gas in the breathing tube 103, and the temperature and humidity sensor 108 is used for collecting the temperature and humidity around the installation position in real time.
The blower 102 and the heating plate 106 are both arranged in the instrument host 101, the water tank 104 is arranged in a heating area of the heating plate 106, a water outlet end of the water tank 104 is connected with an air inlet end of the breathing tube 103 through the bent tube 105, and heating wires are arranged in a tube wall of the breathing tube 103;
specifically, the blower 102 is installed inside the casing of the instrument host 101, and the air inlet end of the blower 102 is in contact with the external environment; the heating plate 106 is installed inside the case of the instrument main unit 101, and a heating area of the heating plate 106 is exposed to the outside of the case of the instrument main unit 101. The water tank 104 is placed in the heating zone of the heating plate 106; the top of the water tank 104 is provided with a water outlet end, the water outlet end is connected with one end of the elbow 105, and the other end of the elbow 105 is connected with the air inlet end of the breathing tube 103. The connection mode of the above components may be set by itself according to needs, and is not limited herein. In a specific embodiment, the wall of the breathing tube 103 has a double-layer structure, and the heating wire is disposed around the breathing tube 103 in the interlayer of the wall.
Temperature and humidity sensors 108 are arranged in the air inlet end of the fan 102, the air outlet end of the breathing tube 103 and the bent tube 105, and data ends of the temperature and humidity sensors 108 are connected with the instrument host 101;
in specific implementation, a temperature and humidity sensor 108 is arranged at the air inlet end of the fan 102 and used for collecting the temperature and humidity of the external environment; a temperature and humidity sensor 108 is arranged at the air outlet end of the breathing tube 103 and is used for collecting the temperature and humidity of the air flowing through the breathing tube; a temperature and humidity sensor 108 is disposed inside the elbow 105 for collecting the temperature and humidity of the gas flowing through the elbow.
The data end of the temperature and humidity sensor 108 is in communication connection with a processor in the instrument host 101, and the temperature and humidity sensor 108 sends collected temperature and humidity data to the instrument host 101 through the data end.
The instrument host 101 is configured to adjust heating powers of the heating plate 106 and the heating wire according to temperature and humidity data collected by the temperature and humidity sensor 108.
Specifically, the processor in the instrument host 101 adjusts the heating powers of the heating plate 106 and the heating wire in real time according to the received temperature and humidity data acquired by the temperature and humidity sensor 108 and the set relationship between the temperatures and the humidities, so that the temperatures and the humidities in the elbow and the breathing tube are maintained at the set temperature and the humidity.
The high flow respiratory humidification therapeutic instrument that this embodiment provided is through the humidity and the temperature of real-time detection return bend and respiratory tube to through the data of feedback and the heating power of the humiture automatically regulated hot plate of environment and heater strip, accurately output the humidity and the temperature of setting for, reduce the pipeline condensate water of respiratory tube and return bend, the humidification volume of effectual control output and reduction power consumption.
According to an embodiment of the present disclosure, as shown in fig. 2 and 3, the temperature and humidity sensor 108 is suspended in the elbow pipe 105 through a connecting component 109, and the temperature and humidity sensor 108 is not attached to the inner wall of the elbow pipe 105.
Specifically, the temperature/humidity sensor 108 is disposed inside the elbow pipe 105 through the connection member 109, and floats inside the elbow pipe 105 without contacting with the pipe wall of the elbow pipe 105. Therefore, the influence of the temperature of the pipe wall and the condensed water is avoided, and the phenomenon that the condensed water on the pipe wall is immersed in the temperature and humidity sensor 108 to cause short circuit, so that the loss of the bent pipe 105 is large is avoided.
According to a specific embodiment of the present disclosure, the connection part 109 is a circuit board, and a surface of the circuit board is coated with a waterproof material.
In a specific implementation, the connecting component 109 may be a circuit board; the temperature and humidity sensor 108 is disposed on the circuit board without contacting the inner wall of the elbow pipe 105. The surface of the circuit board is coated with a waterproof material, the surface of the circuit board can be coated with a layer of plastic, and other materials can be flexibly selected according to the actual condition without limitation.
According to a specific embodiment of the present disclosure, the high flow respiratory humidification therapy apparatus 100 further comprises an adjusting panel 107, the adjusting panel 107 comprises an input/output module and a display, and the input/output module and the display are both connected to the apparatus host 101.
Specifically, the adjustment panel 107 is provided with 9 steps of adjustable humidity, and the adjustment panel 107 is provided with a shuttle, which rotates left and right to add or subtract gears. The user is facilitated to perform finer humidity gear setting. The input and output module is used for transmitting data such as temperature, humidity and flow set by a user to the instrument host 101 and receiving temperature and humidity data collected by the temperature and humidity sensor 108 transmitted by the instrument host 101. The display is used for displaying data such as set temperature, humidity and flow and humiture data acquired by the humiture sensor 108. Can carry out more meticulous humidity gear setting according to actual need, reach better humidifying effect.
Example 2
Fig. 4 is a schematic flow chart of a temperature and humidity adjustment method according to an embodiment of the present disclosure. As shown in fig. 4, the temperature and humidity adjusting method applied to the high flow respiratory humidification therapeutic apparatus in embodiment 1 mainly includes the following steps:
s401, receiving set humidity and set temperature input by a user;
specifically, the user inputs the set temperature and the set humidity through the adjustment panel, and may set the flow rate and the like. The adjusting panel transmits the set humidity, the set temperature and the like input by the user to a processor of the instrument host. The instrument host adjusts the power of the heating plate and the heating wire according to the set temperature, the set humidity and the like, so that the temperature and the humidity in the elbow and the breathing tube reach the set temperature and humidity.
S402, collecting the temperature and humidity of the air inlet end of the fan, the inside of the bent pipe and the air outlet end of the breathing pipe in real time;
during specific implementation, the instrument host receives temperature and humidity data transmitted by temperature and humidity sensors arranged at the air inlet end of the fan, the bent pipe and the air outlet end of the breathing pipe in real time.
S403, calculating a first target dew point temperature and a first target absolute humidity in the elbow according to the temperature and humidity, the set temperature and the set humidity of the air inlet end of the fan;
s404, calculating a second target dew point temperature and a second target absolute humidity in the breathing pipe according to the temperature and humidity, the set temperature and the set humidity of the air inlet end of the fan;
specifically, there is a limit to the amount of water vapor that can be contained in a unit volume of air under a certain pressure and a certain temperature, and if the amount of water vapor contained in the volume of air exceeds this limit, the water vapor condenses to generate condensed water, and the value of the amount of water vapor actually contained in the volume of air is expressed by the absolute humidity. Under the condition that the water vapor content in the air is unchanged and the air pressure is kept constant, the temperature when the air is cooled to reach saturation is called dew point temperature. When the temperature is lower than the dew point temperature, water vapor may condense into water droplets.
Therefore, the target dew point temperature and the target absolute humidity in the elbow and the breathing tube need to be calculated according to the temperature and humidity, the set temperature and the set humidity of the air inlet end of the fan, so that the temperature and the humidity in the elbow and the breathing tube are in a proper range, and the condensate water is avoided from appearing to influence the use of a user.
S405, calculating absolute humidity and dew point temperature in the elbow according to the temperature and humidity of the air inlet end of the fan and the temperature and humidity in the elbow;
during specific implementation, the dew point temperature and the absolute humidity in the elbow pipe need to be calculated according to temperature and humidity data acquired by the temperature and humidity sensor, and then the temperature in the elbow pipe is higher than the dew point temperature by adjusting the heating power of the heating plate so as to ensure that no condensed water is generated.
S406, calculating dew point temperature and absolute humidity in the breathing pipe according to the temperature and humidity of the air inlet end of the fan and the temperature and humidity of the air outlet end of the breathing pipe;
s407, performing closed-loop control on the heating power of the heating plate and the heating wire according to the first target dew point temperature, the first target absolute humidity, the second target dew point temperature, the second target absolute humidity, the dew point temperature and the absolute humidity in the bent pipe and the breathing pipe.
Specifically, the heating power of the heating plate is adjusted to be increased or decreased according to the calculated first target dew point temperature and first target absolute humidity and the calculated magnitude relation between the dew point temperature and the absolute humidity in the bent pipe. And adjusting the heating power of the heating wire to increase or decrease according to the calculated second target dew point temperature and second target absolute humidity and the calculated magnitude relation between the dew point temperature and the absolute humidity in the breathing tube.
According to one embodiment of the present disclosure, as shown in fig. 5, a user first sets oxygen concentration, flow rate, temperature and humidity on the adjustment panel; the temperature and humidity sensor collects environmental temperature and humidity and transmits the environmental temperature and humidity to the instrument host, and the instrument host calculates absolute humidity and dew point temperature in the elbow and the breathing tube. And controlling the power of the heating plate according to the collected environment temperature and humidity and the set temperature, humidity and flow values. The method comprises the following steps that an instrument host acquires the temperature and humidity of a temperature and humidity sensor in a bent pipe, and calculates the real-time absolute humidity in the bent pipe; according to the real-time absolute humidity, carrying out closed-loop control on the absolute humidity and the dew point temperature in the bent pipe, controlling a heating plate to heat, and simultaneously sampling the temperature in the bent pipe; acquiring the temperature of a temperature sensor at the air outlet end of the breathing tube, performing closed-loop control on the temperature in the breathing tube, and controlling the heating wire to heat; and acquiring the temperature and humidity in the breathing tube, and calculating the real-time absolute humidity in the breathing tube.
And if the real-time absolute humidity in the breathing pipe does not reach the second target absolute humidity, the heating plate and the heating wire are heated for 30 minutes and do not reach the second target absolute humidity, and the target absolute humidity and the target dew point temperature in the bent pipe and the breathing pipe are adjusted and fed back in real time. If the real-time absolute humidity in the breathing pipe reaches the second target absolute humidity, the heating plate and the heating wires keep running and continue running, and the feedback of the temperature and humidity sensor is obtained in real time.
According to an embodiment of the present disclosure, the step of performing closed-loop control on the heating power of the heating plate and the heating wire according to the first target dew point temperature, the first target absolute humidity, the second target dew point temperature, the second target absolute humidity, and the dew point temperature and the absolute humidity in the elbow and the breathing tube includes:
performing closed-loop control on the heating power of the heating plate according to the absolute humidity, the dew point temperature, the first target dew point temperature and the first target absolute humidity in the bent pipe;
specifically, as shown in fig. 6, the real-time temperature and humidity in the elbow are sampled, and the real-time absolute humidity in the elbow is calculated; and carrying out closed-loop control on absolute humidity and dew point temperature in the bent pipe, controlling the heating power of the heating plate and heating the water tank.
And carrying out closed-loop control on the heating power of the heating wires and the heating plate according to the dew point temperature and the absolute humidity in the breathing pipe, the second target dew point temperature and the second target absolute humidity.
In specific implementation, as shown in fig. 7, the temperature in the breathing tube is sampled, and the heating wire in the breathing tube is closed-loop controlled according to the sampled temperature. And collecting the temperature and humidity in the breathing tube in real time, and calculating the real-time absolute humidity in the breathing tube.
If the real-time absolute humidity in the breathing tube does not reach the second target absolute humidity, the heating wires and the heating plate are heated for 30 minutes, the first target absolute humidity and the first target dew point temperature in the bent tube are adjusted, and the heating power of the heating wires for heating the breathing tube is adjusted; and acquiring the feedback of the temperature and humidity sensor in real time. If the real-time absolute humidity in the breathing tube reaches the second target absolute humidity, the heating plate and the heating wire keep running continuously, and the feedback of the temperature and humidity sensor is obtained in real time.
According to an embodiment of the present disclosure, the step of performing closed-loop control on the heating power of the heating plate according to the absolute humidity in the elbow, the dew point temperature, the first target dew point temperature, and the first target absolute humidity includes:
if the absolute humidity in the bent pipe does not reach the first target absolute humidity and the dew point temperature in the bent pipe does not reach the first target dew point temperature, adjusting the heating power of the heating plate to increase in real time;
if the absolute humidity in the bent pipe exceeds the first target absolute humidity and the dew point temperature in the bent pipe exceeds the first target dew point temperature, the heating power of the heating plate is adjusted in real time to be reduced;
during specific implementation, if the temperature in the bent pipe is too low, water vapor is easy to condense and is hung on the pipe wall, so that resource waste is caused; if the temperature in the elbow is too high, the temperature of the gas is also increased, and the respiratory tract of a user is easily damaged. Therefore, the heating power of the heating plate needs to be adjusted in real time according to the temperature and the humidity in the bent pipe, so that the temperature and the humidity of the gas in the bent pipe are always kept in a proper range, and the use experience of a user is improved.
The step of "according to dew point temperature and absolute humidity in the breathing pipe, second target dew point temperature and second target absolute humidity, carry out closed loop control to the heating power of heater strip and hot plate" includes:
if the absolute humidity in the breathing pipe does not reach the second target absolute humidity and the dew point temperature in the breathing pipe does not reach the second target dew point temperature, adjusting the heating power of the heating wires and the heating plate to increase in real time;
and if the absolute humidity in the breathing pipe exceeds the second target absolute humidity and the dew point temperature in the breathing pipe exceeds the second target dew point temperature, adjusting the heating power of the heating wires and the heating plate in real time and reducing the heating power.
In particular, during use, if the temperature in the breathing tube is too low, water vapor may condense, hang up on the tube wall, and even be carried out by the gas into the user's respiratory tract, causing discomfort or other safety risks to the user. And if the temperature in the breathing pipe is too high, the respiratory tract of the user is easily burnt, and the user is injured. The temperature and humidity in the breathing pipe are monitored in real time, and the heating power of the heating wires is adjusted in real time according to the temperature and humidity, so that the temperature and humidity in the breathing pipe are always in a proper range, the user is prevented from being injured, and the user experience is improved.
According to a specific embodiment of the present disclosure, the calculation method of the dew point temperature is:
Figure BDA0003097558190000121
wherein, T d Dew point temperature, a and b are constants, t is temperature, and f is humidity.
In specific implementation, firstly, the saturated vapor pressure corresponding to the real-time temperature is calculated according to the constants a and b and the saturated vapor pressure when the temperature is 0 ℃; calculating the water vapor pressure in the pipeline according to the acquired humidity and the calculated saturated water vapor pressure corresponding to the real-time temperature; and finally, calculating the dew point temperature according to the constants a and b and the water vapor pressure in the pipeline.
According to a specific embodiment of the present disclosure, the method for calculating the absolute humidity includes:
Figure BDA0003097558190000122
where ρ is w Absolute humidity, a and c are constants, t is temperature, f is humidity, E 0 Is the saturated vapor pressure of water at 0 ℃, R w The gas constant of water.
Specifically, the unit of the temperature t acquired by the temperature and humidity sensor is celsius degrees, and the unit of the temperature t needs to be converted into kelvin when calculating the absolute humidity. And calculating to obtain the absolute humidity by using the temperature, the gas constant of the water and the water vapor pressure in the pipeline.
According to one embodiment of the present disclosure, a has a value of 7.5, b has a value of 237.3, and c has a value of 237.7.
According to the temperature and humidity adjusting method provided by the embodiment of the disclosure, the absolute humidity and the dew point temperature are calculated by collecting the temperature and humidity detected by a temperature and humidity sensor; and performing closed-loop control on the heating power of the heating plate and the heating wire by using the instrument host according to the relation between the set temperature and the set humidity input by the user and the dew point temperature and the absolute humidity. This disclosed embodiment is through the humidity and the temperature of real-time detection return bend and respiratory tube to through the data of feedback and the humiture automatically regulated heating plate of environment and the heating power of heater strip, accurately output humidity and the temperature of settlement, reduce return bend and respiratory tube pipeline condensation water, the effectual output of control amount of humidifying reduces the consumption.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention.

Claims (6)

1. A temperature and humidity adjusting method is characterized by being applied to a high-flow respiratory humidification therapeutic apparatus which comprises an apparatus host, a fan, a respiratory tube, a water tank, a bent tube, a heating plate, a heating wire and a plurality of temperature and humidity sensors;
the fan and the heating plate are arranged in the instrument host, the water tank is arranged in a heating area of the heating plate, a water outlet end of the water tank is connected with an air inlet end of the breathing tube through the bent tube, and a heating wire is arranged in the tube wall of the breathing tube;
temperature and humidity sensors are arranged in the air inlet end of the fan, the air outlet end of the breathing tube and the bent tube, and data ends of the temperature and humidity sensors are connected with the instrument host;
the instrument host is used for adjusting the heating power of the heating plate and the heating wire according to temperature and humidity data acquired by the temperature and humidity sensor;
the temperature and humidity sensor is suspended in the bent pipe through a connecting part and is not attached to the inner wall of the bent pipe;
the method comprises the following steps:
receiving set humidity and set temperature input by a user;
collecting the temperature and humidity of the air inlet end of the fan, the inside of the bent pipe and the air outlet end of the breathing pipe in real time;
calculating a first target dew point temperature and a first target absolute humidity in the elbow according to the temperature and humidity, the set temperature and the set humidity of the air inlet end of the fan;
calculating a second target dew point temperature and a second target absolute humidity in the breathing pipe according to the temperature and humidity, the set temperature and the set humidity of the air inlet end of the fan;
calculating absolute humidity and dew point temperature in the elbow according to the temperature and humidity of the air inlet end of the fan and the temperature and humidity in the elbow;
calculating dew point temperature and absolute humidity in the breathing tube according to the temperature and humidity of the air inlet end of the fan and the temperature and humidity of the air outlet end of the breathing tube;
performing closed-loop control on the heating power of the heating plate and the heating wire according to the first target dew point temperature, the first target absolute humidity, the second target dew point temperature, the second target absolute humidity, and the dew point temperature and the absolute humidity in the bent pipe and the breathing pipe;
the step of "according to first target dew point temperature, first target absolute humidity, second target dew point temperature, second target absolute humidity and the return bend in and the dew point temperature and the absolute humidity in the breathing pipe, carry out closed loop control to the heating power of hot plate and heater strip" includes:
performing closed-loop control on the heating power of the heating plate according to the absolute humidity, the dew point temperature, the first target dew point temperature and the first target absolute humidity in the bent pipe;
according to the dew point temperature and the absolute humidity in the breathing pipe, the second target dew point temperature and the second target absolute humidity, the heating power of the heating wires and the heating plate is subjected to closed-loop control;
the step of performing closed-loop control on the heating power of the heating plate according to the absolute humidity, the dew point temperature, the first target dew point temperature and the first target absolute humidity in the elbow comprises the following steps:
if the absolute humidity in the bent pipe does not reach the first target absolute humidity and the dew point temperature in the bent pipe does not reach the first target dew point temperature, adjusting the heating power of the heating plate to increase in real time;
if the absolute humidity in the bent pipe exceeds the first target absolute humidity and the dew point temperature in the bent pipe exceeds the first target dew point temperature, the heating power of the heating plate is adjusted in real time to be reduced;
the step of "according to dew point temperature and absolute humidity in the breathing pipe, second target dew point temperature and second target absolute humidity, carry out closed loop control to the heating power of heater strip and hot plate" includes:
if the absolute humidity in the breathing pipe does not reach the second target absolute humidity and the dew point temperature in the breathing pipe does not reach the second target dew point temperature, adjusting the heating power of the heating wires and the heating plate to increase in real time;
and if the absolute humidity in the breathing pipe exceeds the second target absolute humidity and the dew point temperature in the breathing pipe exceeds the second target dew point temperature, adjusting the heating power of the heating wires and the heating plate in real time and reducing the heating power.
2. The method according to claim 1, wherein the high flow respiratory humidification therapy apparatus further comprises an adjustment panel, the adjustment panel comprises an input/output module and a display, and the input/output module and the display are both connected to the apparatus host.
3. The temperature and humidity adjustment method according to claim 1, wherein the connection member is a circuit board, and a surface of the circuit board is coated with a waterproof material.
4. The temperature and humidity adjustment method according to claim 1, wherein the calculation method of the dew point temperature is as follows:
Figure QLYQS_1
；
wherein the content of the first and second substances,
Figure QLYQS_2
is dew point temperature, is greater than or equal to>
Figure QLYQS_3
、/>
Figure QLYQS_4
Is constant->
Figure QLYQS_5
Is temperature and/or is>
Figure QLYQS_6
Is humidity.
5. The temperature and humidity adjustment method according to claim 4, wherein the absolute humidity is calculated by:
Figure QLYQS_7
；
wherein, the first and the second end of the pipe are connected with each other,
Figure QLYQS_8
is absolute humidity, is greater than or equal to>
Figure QLYQS_9
、/>
Figure QLYQS_10
Is constant->
Figure QLYQS_11
Is temperature and/or is>
Figure QLYQS_12
Is humidity and is->
Figure QLYQS_13
Is the saturated vapor pressure of water at 0 ℃>
Figure QLYQS_14
The gas constant of water.
6. The temperature/humidity adjustment method according to claim 5,
Figure QLYQS_15
has a value of 7.5->
Figure QLYQS_16
Has a value of 237.3->
Figure QLYQS_17
The value of (b) is 237.7./>
CN202110614584.1A 2021-06-02 2021-06-02 Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same Active CN113304367B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110614584.1A CN113304367B (en) 2021-06-02 2021-06-02 Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110614584.1A CN113304367B (en) 2021-06-02 2021-06-02 Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same

Publications (2)

Publication Number Publication Date
CN113304367A CN113304367A (en) 2021-08-27
CN113304367B true CN113304367B (en) 2023-04-07

Family

ID=77377314

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110614584.1A Active CN113304367B (en) 2021-06-02 2021-06-02 Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same

Country Status (1)

Country Link
CN (1) CN113304367B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116570808B (en) * 2023-07-12 2023-12-01 斯莱达医疗用品（惠州）有限公司 Breathing machine pipeline temperature and humidity intelligent regulation method, system and medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328031A (en) * 2011-01-24 2013-09-25 雷斯梅德有限公司 Humidifier
CN107715271A (en) * 2008-03-06 2018-02-23 瑞思迈有限公司 The humidifying of breathing gas
CN109876257A (en) * 2019-03-28 2019-06-14 广州鲸科医疗科技有限公司 A kind of pipeline of inhaling therapeutical instrument
CN210433824U (en) * 2018-10-24 2020-05-01 浙江莱福医疗科技有限公司 Respiratory therapy equipment with heating and humidifying functions
CN112512613A (en) * 2018-08-28 2021-03-16 汉密尔顿医疗股份公司 Breathing apparatus with improved humidification of the breathing gas
JP2021058228A (en) * 2019-10-02 2021-04-15 株式会社Ｍａｇｏｓ Humidifier and respiration auxiliary device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10130787B2 (en) * 1997-06-17 2018-11-20 Fisher & Paykel Healthcare Limited Humidity controller
DE102006019402A1 (en) * 2006-04-24 2007-10-25 Seleon Gmbh Method for controlling a TNI device and TNI device
CN110721386B (en) * 2008-05-27 2023-06-20 菲舍尔和佩克尔保健有限公司 Humidifier room temperature control for accurate humidity control
CN108283753A (en) * 2017-12-16 2018-07-17 湖南明康中锦医疗科技发展有限公司 Breathe humidification instrument anti-dry detecting system and method
CN109876256A (en) * 2019-03-28 2019-06-14 广州鲸科医疗科技有限公司 A kind of inhaling therapeutical instrument

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107715271A (en) * 2008-03-06 2018-02-23 瑞思迈有限公司 The humidifying of breathing gas
CN103328031A (en) * 2011-01-24 2013-09-25 雷斯梅德有限公司 Humidifier
CN112512613A (en) * 2018-08-28 2021-03-16 汉密尔顿医疗股份公司 Breathing apparatus with improved humidification of the breathing gas
CN210433824U (en) * 2018-10-24 2020-05-01 浙江莱福医疗科技有限公司 Respiratory therapy equipment with heating and humidifying functions
CN109876257A (en) * 2019-03-28 2019-06-14 广州鲸科医疗科技有限公司 A kind of pipeline of inhaling therapeutical instrument
JP2021058228A (en) * 2019-10-02 2021-04-15 株式会社Ｍａｇｏｓ Humidifier and respiration auxiliary device

Also Published As

Publication number Publication date
CN113304367A (en) 2021-08-27

Similar Documents

Publication Publication Date Title
WO2021135942A1 (en) Humidification control system and method for ventilation therapy apparatus
CN108245759A (en) Breathe humidification instrument humiture output control system and method
RU2708612C2 (en) System and method of controlling moisture in therapy with maintaining pressure
AU2008360394B2 (en) System and method for determining humidity in a respiratory treatment system
CN103379936B (en) For bestow the system and method for humidified gases to the patient of ventilation
US8640696B2 (en) System and method for determining humidity in a respiratory treatment system
US20210214222A1 (en) Systems and Methods for Nitric Oxide Generation with Humidity Control
JP6342816B2 (en) Compensation of air density fluctuations in pressure support devices
JP2017525513A5 (en)
US5722393A (en) Exhaled gas cooling device
CN113304367B (en) Temperature and humidity adjusting method and high-flow respiratory humidification therapeutic apparatus applying same
JP2019505297A5 (en)
CN111110978B (en) System and method for controlling temperature of heating pipe of breathing support equipment and breathing support equipment
US20210370016A1 (en) Respiratory device with improved humidification of the respiration gas
Cramer XXIII Heat and Moisture Exchange of Respiratory Mucous Membrane
CN111110980A (en) Humidification adjusting method of respiratory support equipment and respiratory support equipment
CN206261882U (en) The adjustable cupping glass of constant temperature and pressure
FI3598991T3 (en) Low-flow oxygen therapy humidifier and method
US20210322711A1 (en) Respiratory device with rainout protection in the patient interface
CN114306866A (en) Method and device for controlling respiratory humidification instrument, respiratory humidification instrument and storage medium
US20140060533A1 (en) Methods and system for humidifier control using enthalpy-based calculation
CA3126584A1 (en) Surgical humidifier control
WO2020243954A1 (en) Dew point sensor system, method for modulating a humidifier heater plate, and humidifier/medical device containing
CN217608870U (en) Flue gas causes and hinders experimental apparatus
CN207096828U (en) Urea evaporation concentration control system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant