WO2022174674A1 - 一种ntc测温电路、呼吸机以及呼吸机开机自检方法 - Google Patents

一种ntc测温电路、呼吸机以及呼吸机开机自检方法 Download PDF

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WO2022174674A1
WO2022174674A1 PCT/CN2021/141039 CN2021141039W WO2022174674A1 WO 2022174674 A1 WO2022174674 A1 WO 2022174674A1 CN 2021141039 W CN2021141039 W CN 2021141039W WO 2022174674 A1 WO2022174674 A1 WO 2022174674A1
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Prior art keywords
module
temperature
temperature measurement
detection
ntc
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PCT/CN2021/141039
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English (en)
French (fr)
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赵军
徐结兵
于海滨
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东莞永胜医疗制品有限公司
东莞永昇医疗科技有限公司
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Priority to EP21921677.7A priority Critical patent/EP4089383A4/en
Priority to JP2022549390A priority patent/JP7465358B2/ja
Priority to US17/905,243 priority patent/US20230145242A1/en
Publication of WO2022174674A1 publication Critical patent/WO2022174674A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • 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
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/007—Testing
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3327—Measuring
    • 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
    • A61M2205/70—General characteristics of the apparatus with testing or calibration facilities
    • A61M2205/702—General characteristics of the apparatus with testing or calibration facilities automatically during use

Definitions

  • the invention relates to the technical field of medical equipment, in particular to an NTC temperature measurement circuit, a ventilator and a self-checking method for the ventilator.
  • ventilator As an effective means to artificially replace the function of spontaneous ventilation, has been widely used in respiratory failure caused by various reasons, anesthesia and respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine.
  • a ventilator is a vital medical device that can prevent and treat respiratory failure, reduce complications, and save and prolong patients' lives.
  • the ventilator is a negative temperature coefficient (Negative Temperature CoeffiCient, NTC) thermistor temperature measurement product.
  • NTC Negative Temperature CoeffiCient
  • the existing inspection method is to use resistance or other circuit detection instruments to manually detect whether the circuit is faulty.
  • standard resistance is used instead of NTC for detection and calibration. For example: when the NTC is 2.252K, the device displays a temperature of 25.5 when the standard resistance is 2.2K. °C, when the standard resistance is 1K, the temperature displayed by the device is 44.5°C.
  • the current detection scheme has the following defects: 1. It is manual detection, and additional standard detection resistors are required, which increases the cost; 2. The accuracy of the temperature measurement circuit cannot be guaranteed when the detection is performed within the period range.
  • the purpose of the present invention is to provide a NTC temperature measurement circuit, a ventilator and a self-checking method for the ventilator, so as to solve the problem that the detection cost of the NTC temperature measurement circuit of the existing ventilator is high and accurate Unguaranteed issues.
  • An NTC temperature measurement circuit is used in a heating circuit, wherein the NTC temperature measurement circuit comprises: a temperature measurement module, a switch module, a control module and a detection module;
  • the control module is respectively electrically connected with the temperature measurement module, the detection module and the switch module;
  • the switch module is electrically connected to the temperature measurement module and the detection module, respectively;
  • the temperature measurement module is used to monitor the temperature of the measured part in the heating circuit and obtain the first temperature data
  • the switch module is used to switch the on-off between the temperature measurement module and the detection module according to the enabling signal output by the control module;
  • the detection module is used to calibrate the temperature in the temperature detection circuit and obtain second temperature data
  • the control module is used to obtain the first temperature data and adjust the temperature of the measured part in the heating circuit according to the first temperature data, and to obtain the second temperature data and judge the accuracy of the temperature measurement according to the second temperature data. sex.
  • the temperature measurement module includes: an NTC thermistor, one end of the NTC thermistor is used for electrical connection with the switch module, and the other end of the NTC thermistor is connected to the control module Electrically connected and grounded.
  • the detection module includes: a plurality of detection resistors, one end of the detection resistors is used for electrical connection with the switch module, and the other end of the detection resistors is electrically connected with the control module.
  • the detection resistor is a standard resistor.
  • the switch module includes: a multi-way switch, the multi-way switch is respectively connected to the control module and the power supply, and the multi-way switch is also used to connect the NTC thermistor and the detection resistance.
  • control module includes: a single-chip microcomputer, the input end of the single-chip microcomputer is electrically connected to the temperature measurement module and the detection module, and the output end of the single-chip microcomputer is electrically connected to the switch module.
  • the NTC temperature measurement circuit further includes: an operational amplifier, the input end of the operational amplifier is electrically connected to the NTC thermistor and the detection resistor, and the output end of the operational amplifier is connected to the NTC thermistor and the detection resistor.
  • the microcontroller is electrically connected.
  • the present invention also provides a ventilator, the ventilator comprising:
  • the above NTC temperature measurement circuit wherein, the temperature measurement module and the detection module are arranged in the heating circuit.
  • the ventilator also includes:
  • a display is electrically connected with the control module.
  • the present invention also provides a self-checking method for a ventilator, which is applied to the above-mentioned ventilator, and the method includes:
  • the temperature of the gas in the measured part in the heating circuit is monitored by the temperature measurement module, and the temperature of the gas in the heating circuit is adjusted by the control module.
  • the present invention provides an NTC temperature measurement circuit, a ventilator, and a self-checking method for a ventilator, wherein the NTC temperature measurement circuit is used in a heating circuit, and the NTC temperature measurement circuit includes: a temperature measurement module, a switch module a control module and a detection module; the control module is electrically connected to the temperature measurement module, the detection module, and the switch module, respectively; the switch module is electrically connected to the temperature measurement module and the detection module, respectively;
  • the temperature measurement module is used to monitor the temperature of the measured part in the heating circuit and obtain the first temperature data; the switch module is used to switch the temperature measurement module, the detection The on-off between modules; the detection module is used to calibrate the temperature in the temperature detection circuit and obtain the second temperature data; the control module is used to obtain the first temperature data and adjust the measured temperature in the heating circuit according to the first temperature data.
  • the temperature of the part is used to obtain the second temperature data and judge the accuracy of temperature measurement according to the second temperature data.
  • the invention monitors the temperature of the gas in the heating pipeline through the temperature measurement module, and checks the accuracy of the temperature detection through the detection module when starting up, realizes the self-checking at the start, can find problems in time, and ensures the accuracy of the temperature measurement. It avoids the risk of accidents and avoids manual inspection, which reduces the cost of inspection.
  • FIG. 1 is a functional block diagram of the NTC temperature measuring circuit in the present invention.
  • FIG. 2 is a schematic diagram of the NTC temperature measuring circuit in the present invention.
  • FIG. 3 is a schematic flowchart of a self-checking method for a ventilator according to the present invention.
  • the present invention provides an NTC temperature measurement circuit, a ventilator and a self-checking method for the ventilator, wherein the NTC temperature measurement circuit is applied to products with NTC temperature measurement such as the ventilator and humidifier, and the NTC temperature measurement circuit is used in the NTC temperature measurement circuit.
  • NTC temperature measurement circuit is applied to products with NTC temperature measurement such as the ventilator and humidifier, and the NTC temperature measurement circuit is used in the NTC temperature measurement circuit.
  • a number of standard resistors are added to the temperature circuit, so that the ventilator can perform self-test every time it is turned on. When the test is qualified, it will be turned on normally. Otherwise, a fault signal will be issued to inform the user for maintenance.
  • the inventor's research found that the current inspection of the ventilator is mainly to arrange regular (3-month or 6-month cycle) inspections by staff, and use resistance or other circuit detection instruments to manually detect whether the circuit is faulty. In this way, it will not only invest a large amount of manpower and material resources and increase the production cost, but also there is a risk of inaccurate temperature measurement in the periodic detection, resulting in low reliability.
  • the present invention provides an NTC temperature measurement circuit and a ventilator, which monitors the temperature of the gas in the heating pipeline through a temperature measurement module, and checks the accuracy of the temperature detection through the detection module when the machine is turned on. Power-on self-test can find problems in time, ensure the accuracy of temperature measurement, avoid accident risks, and avoid manual inspections, which reduces the cost of testing.
  • the present invention provides a preferred embodiment of an NTC temperature measuring circuit.
  • an NTC temperature measurement circuit provided by the present invention can be used in a heating loop.
  • the NTC temperature measurement circuit includes a temperature measurement module 100 , a switch module 200 , a control module 300 and a detection module 400 .
  • the control module 300 is electrically connected to the temperature measurement module 100 , the detection module 400 , and the switch module 200 , respectively, and the switch module 200 is electrically connected to the temperature measurement module 100 and the detection module 400 , respectively.
  • the temperature measurement module 100 is used for monitoring the temperature of the measured part in the heating circuit and obtains the first temperature data
  • the switch module 200 is used for switching and the temperature measurement according to the energy signal output by the control module 300
  • the on-off between the module 100 and the detection module 400, the detection module 400 is used to calibrate the temperature in the temperature detection circuit and obtain the second temperature data
  • the control module 300 is used to obtain the first temperature data and according to the first temperature data.
  • a temperature data adjusts the temperature of the measured part in the heating circuit, and is used to obtain the second temperature data and judge the accuracy of temperature measurement according to the second temperature data.
  • the temperature measurement module 100 is disposed in the heating loop, can monitor the temperature of the measured part in the heating loop to obtain the first temperature data, and can feed back the monitored temperature to the control module 300, and the control module 300
  • the temperature of the gas in the heating loop can be regulated according to the first temperature data.
  • the present application adds a detection module 400 to the NTC temperature measurement circuit, so as to perform self-inspection when starting up, so that the temperature in the temperature detection circuit can be calibrated and the second temperature data can be obtained.
  • the control module 300 can determine the accuracy of temperature measurement according to the second temperature data.
  • the NTC temperature measurement circuit monitors the temperature of the measured part in the heating pipeline through the temperature measurement module 100, and checks the accuracy of the temperature detection through the detection module 400 when the machine is turned on, thereby realizing the power-on self-checking , can find problems in time, ensure the accuracy of temperature measurement, avoid accident risks, high reliability, and avoid manual inspection, which reduces the cost of detection.
  • the temperature measurement module 100 includes: an NTC thermistor, and one end of the NTC thermistor RTH is used for electrical connection with the switch module 200, so The other end of the NTC thermistor RTH is electrically connected to the control module 300 and grounded.
  • the NTC thermistor RTH is located in the temperature data line, and is partially connected to the measured part through mounting holes, etc., for example, to detect the gas temperature of the heating breathing circuit (when applied to a ventilator), the NTC thermistor The resistor RTH is connected to the power supply through the switch module 200 to supply power to the NTC thermistor RTH through the power supply, and the NTC thermistor RTH is also electrically connected to the control module 300. When the switch module 200 is in an on state, the temperature in the heating circuit can be fed back to the control module 300 to monitor the temperature of the gas in the heating circuit.
  • the heating circuit refers to the pipeline used for breathing equipment, wherein a heating wire is arranged inside, which has the function of humidifying and heating the gas.
  • the detection module 400 includes: a plurality of detection resistors, one end of the detection resistors is used for electrical connection with the switch module 200 , and the other end of the detection resistors is used for electrical connection with the switch module 200 . One end is electrically connected to the control module 300 .
  • the switch module 200 includes: a multi-way switch SW, the multi-way switch SW is respectively connected to the control module 300 and a power supply (which may be a constant current source or a constant voltage source), so The multiplex switch SW is also used to connect the NTC thermistor RTH and the detection resistor.
  • the detection resistor and the NTC thermistor RTH are connected to the control module 300 through the multi-way switch SW, and the control module 300 can control the multi-way switch to realize the connection between the NTC thermistor RTH and the The switching of the detection resistance, when starting up, firstly make the detection resistance conductive to realize the power-on self-test, and then switch to the NTC thermistor RTH when the detection is qualified, to realize the temperature monitoring of the heating circuit, of course, If the self-test fails, a fault signal will be issued to inform the user to carry out maintenance and repair and then start the machine normally.
  • the detection resistor is a standard resistor, and the standard resistor has a fixed resistance value, which is used to replace the NTC thermistor during detection to obtain an expected temperature for detection.
  • the RTH of the NTC thermistor is 2.252K ⁇ , then when the standard resistance 2.2K ⁇ is used, the device display temperature is 25.5°C, and when the standard resistance 1K ⁇ is used, the device display temperature is 44.5°C, if the displayed temperature error is within the range of +/-0.5°, it is qualified and can be turned on normally. , otherwise it means that the temperature measurement circuit is faulty and unqualified, and a fault signal can be issued through the sound or light signal light to remind the user that maintenance is required.
  • the detection resistors are set to two, a first detection resistor R1 and a second detection resistor R2, which are respectively connected with the first and second pins of the multiplexer SW.
  • the pin is connected, and the NTC thermistor RTH is connected with the third pin of the multiplexer.
  • the control module 300 can be used to switch the detection resistors with unequal resistance values in sequence, so that if the displayed temperatures of all the detection resistors are qualified, the device can be powered on normally. It can be understood that the greater the number of detection resistors, the more accurate the detection result. In practical applications, the number of detection resistors can be set according to the actual situation.
  • control module 300 includes: a single-chip MCU, an input end of the single-chip MCU is electrically connected to the temperature measurement module 100 and the detection module 400 , the The output end of the single chip MCU is electrically connected with the switch module 200 .
  • the present application realizes the switching of the multiplex switch SW through the single chip MCU, so as to realize the self-checking of the equipment.
  • the NTC temperature measurement circuit further includes: an operational amplifier OPA, the input end of the operational amplifier OPA is electrically connected to the NTC thermistor RTH and the detection resistor, and the output end of the operational amplifier OPA is connected to the NTC thermistor RTH and the detection resistor.
  • the single-chip MCU is electrically connected, wherein the first pin of the operational amplifier OPA is connected to the single-chip MCU, the second pin of the operational amplifier OPA is connected to the common terminal COM of the multiplexer SW, and the The third pin is connected to the NTC thermistor RTH, the first detection resistor R1 and the second detection resistor R2, and the NTC thermistor RTH, the first detection resistor R1 are collected through the operational amplifier OPA and the voltage of the second sense resistor R2 to measure the temperature.
  • the model of the single-chip microcomputer may be MSP430.
  • the present invention also provides a ventilator, the ventilator includes: a heating circuit and the above NTC temperature measurement circuit; wherein the temperature measurement module and the detection module are arranged in the in the heating circuit.
  • the ventilator includes: a heating circuit and the above NTC temperature measurement circuit; wherein the temperature measurement module and the detection module are arranged in the in the heating circuit.
  • the ventilator further includes: a display, which is electrically connected to the control module, and can be displayed on the display when a fault in the temperature measurement circuit is detected to display Signal a fault. It can be understood that, in some embodiments, the release of the fault signal may also be implemented by means of a warning light or a horn.
  • the present invention also provides a method for self-checking of a ventilator, which is applied to the above-mentioned ventilator, and the method includes:
  • the accuracy of the detected temperature is first checked by the detection module. If the measured temperature is within the error range, the ventilator can be turned on normally. Otherwise, the user is reminded that maintenance is required to achieve the power-on self-check. the goal of.
  • the temperature of the gas in the measured part in the heating circuit can be monitored in real time through the temperature measurement module, and the measured temperature data can be fed back to the control module.
  • the control module can monitor the heating circuit according to the measured temperature data. The temperature of the gas is adjusted.
  • the present invention provides an NTC temperature measurement circuit, a ventilator, and a self-checking method for a ventilator, wherein the NTC temperature measurement circuit is used in a heating circuit, and the NTC temperature measurement circuit includes: a temperature module, a switch module, a control module and a detection module; the control module is respectively electrically connected with the temperature measurement module, the detection module and the switch module; the switch module is respectively connected with the temperature measurement module, the The detection module is electrically connected; the temperature measurement module is used to monitor the temperature of the measured part in the heating circuit and obtain first temperature data; the switch module is used to switch the temperature measurement module according to the energy signal output by the control module The connection between the module and the detection module; the detection module is used to calibrate the temperature in the temperature detection circuit and obtain the second temperature data; the control module is used to obtain the first temperature data and adjust according to the first temperature data The temperature of the measured part in the heating circuit, and for obtaining the second temperature data and judging the accuracy of the temperature measurement according to the second temperature data.
  • the invention monitors the temperature of the measured part in the heating pipeline through the temperature measurement module, and checks the accuracy of the temperature detection through the detection module when starting up, realizes the self-checking at the start, can find problems in time, and ensures the accuracy of temperature measurement It avoids the risk of accidents, and at the same time avoids manual inspection, which reduces the cost of inspection.

Abstract

一种NTC测温电路、呼吸机以及呼吸机开机自检方法，NTC测温电路包括：测温模块(100)、开关模块(200)、控制模块(300)与检测模块(400)；控制模块(300)分别与测温模块(100)、检测模块(400)、开关模块(200)电连接；开关模块(200)分别与测温模块(100)、检测模块(400)电连接；测温模块(100)用于监测加热回路中被测部的温度并得到第一温度数据；开关模块(200)用于根据控制模块(300)输出的能使信号切换与测温模块(100)、检测模块(400)之间的通断；检测模块(400)用于校检测温电路的温度并得到第二温度数据；控制模块(300)用于获取第一温度数据并根据第一温度数据调节加热回路中被测部的温度，以及用于获取第二温度数据并根据第二温度数据判断测温的准确性。实现了开机自检，保证了测温的准确性，并降低了检测成本。

Description

一种NTC测温电路、呼吸机以及呼吸机开机自检方法 技术领域
本发明涉及医疗设备技术领域，尤其涉及的是一种NTC测温电路、呼吸机以及呼吸机开机自检方法。
背景技术
在现代临床医学中，呼吸机作为一项能人工替代自主通气功能的有效手段，已普遍用于各种原因所致的呼吸衰竭、大手术期间的麻醉呼吸管理、呼吸支持治疗和急救复苏中，在现代医学领域内占有十分重要的位置。呼吸机是一种能够起到预防和治疗呼吸衰竭，减少并发症，挽救及延长病人生命的至关重要的医疗设备。
呼吸机为负温度系数(Negative Temperature CoeffiCient，NTC)热敏电阻测温产品，为保证呼吸机测温电路的准确性，需要在一定周期(一般为3个月或者6个月为一个周期)内对呼吸机进行检查。现有的检查方式是采用电阻或其他电路检测仪器手动检测电路是否有故障，通常使用标准电阻来代替NTC进行检测校准，例如：NTC为2.252K时，使用标准电阻2.2K时设备显示温度为25.5℃，使用标准电阻1K时设备显示温度为44.5℃，若检测的误差在+/-0.5°范围内，则合格，否则不合格。当前的检测方案具有以下缺陷：1、为人工检测，且需要额外的标准检测电阻，增加了成本；2、在周期范围内进行检测，无法保证测温电路的准确性。
因此，现有技术还有待于改进和发展。
发明内容
鉴于上述现有技术的不足，本发明的目的在于提供一种NTC测温电路、呼吸机以及呼吸机开机自检方法，以解决现有呼吸机的NTC测温电路的检测成本较高且准确性无法保证的问题。
本发明的技术方案如下：
一种NTC测温电路，用于加热回路中，所述NTC测温电路包括：测温模块、开关模块、控制模块与检测模块；
所述控制模块分别与所述测温模块、所述检测模块、所述开关模块电连接；
所述开关模块分别与所述测温模块、所述检测模块电连接；
所述测温模块用于监测加热回路中被测部的温度并得到第一温度数据；
所述开关模块用于根据所述控制模块输出的能使信号切换与所述测温模块、所述检测模块之间的通断；
所述检测模块用于校检测温电路中的温度并得到第二温度数据；
所述控制模块用于获取第一温度数据并根据第一温度数据调节加热回路中被测部的温度，以及用于获取所述第二温度数据并根据所述第二温度数据判断测温的准确性。
本发明的进一步设置，所述测温模块包括：NTC热敏电阻，所述NTC热敏电阻的一端用于与所述开关模块电连接，所述NTC热敏电阻的另一端与所述控制模块电连接并接地。
本发明的进一步设置，所述检测模块包括：若干检测电阻，所述检测电阻的一端用于与所述开关模块电连接，所述检测电阻的另一端与所述控制模块电连接。
本发明的进一步设置，所述检测电阻为标准电阻。
本发明的进一步设置，所述开关模块包括：多路开关，所述多路开关分别连接所述控制模块与供电电源，所述多路开关还用于连接所述NTC热敏电阻与所述检测电阻。
本发明的进一步设置，所述控制模块包括：单片机，所述单片机的输入端与所述测温模块、检测模块电连接，所述单片机的输出端与所述开关模块电连接。
本发明的进一步设置，所述NTC测温电路还包括：运算放大器，所述运算放大器的输入端与所述NTC热敏电阻、所述检测电阻电连接，所述运算放大器的输出端与所述单片机电连接。
基于同样地发明创造，本发明还提供了一种呼吸机，所述呼吸机包括：
加热回路；
如上所述的NTC测温电路；其中，所述测温模块与所述检测模块设置在所述加热回路中。
本发明的进一步设置，所述呼吸机还包括：
显示器，所述显示器与所述控制模块电连接。
基于同样地发明创造，本发明还提供了一种呼吸机开机自检方法，应用于上述所述的呼吸机中，该方法包括：
通过检测模块获取呼吸机的测温电路的温度数据；
通过控制模块将所述温度数据与预设温度值进行比较，若所述温度数据在误差范围内，则控制呼吸机正常开机；
通过测温模块对加热回路中被测部的气体的温度进行监测，并通过所述控制模块调节加热回路中气体的温度。
本发明所提供的一种NTC测温电路、呼吸机以及呼吸机开机自检方法，其中，所述NTC测温电路用于加热回路中，所述NTC测温电路包括：测温模块、开关模块、控制模块与检测模块；所述控制模块分别与所述测温模块、所述检测模块、所述开关模块电连接；所述开关模块分别与所述测温模块、所述检测模块电连接；所述测温模块用于监测加热回路中被测部的温度并得到第一温度数据；所述开关模块用于根据所述控制模块输出的能使信号切换与所述测温模块、所述检测模块之间的通断；所述检测模块用于校检测温电路中的温度并得到第二温度数据；所述控制模块用于获取第一温度数据并根据第一温度数据调节加热回路中被测部的温度，以及用于获取所述第二温度数据并根据所述第二温度数据判断测温的准确性。本发明通过测温模块来监测加热管路中气体的温度，并在开机时通过检测模块来校检测温的准确性，实现了开机自检，能够及时发现问题，保证了测温的准确性，规避了事故风险，同时避免了人工巡检，使得降低了检测成本。
附图说明
为了更清楚的说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1是本发明中NTC测温电路的功能模块架构图。
图2是本发明中NTC测温电路的原理图。
图3是本发明中呼吸机开机自检方法的流程示意图。
附图中各标记：100、测温模块；200、开关模块；300、控制模块；400、检测模块；500、显示屏。
具体实施方式
本发明提供一种NTC测温电路、呼吸机以及呼吸机开机自检方法，其中所述NTC测温电路应用于所述呼吸机、湿化器等具有NTC测温的产品中，通过在NTC测温电路上增加多个标准电阻，使得呼吸机在每次开机时都能够进行自检，当检测合格后才会正常开机，否则发布故障信号以告知用户进行检修。为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
在实施方式和申请专利范围中，除非文中对于冠词有特别限定，否则“一”、“一个”、“所述”和“该”也可包括复数形式。若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。
应该进一步理解的是，本发明的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件，但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其他元件，或者也可以存在中间 元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本发明所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语，应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一样被特定定义，否则不会用理想化或过于正式的含义来解释。
另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
经发明人研究发现，现在针对呼吸机的检查，主要是安排工作人员定期(3个月或者6个月一周期)巡检，用电阻或其他电路检测仪器手动检测电路有无故障。这样，这样不仅会投入较大的人力物力，增加生产成本，而且周期性的检测还存在测温不准的风险，使得可靠性较低。
针对上述技术问题，本发明提供了一种NTC测温电路以及呼吸机，通过测温模块来监测加热管路中气体的温度，并在开机时通过检测模块来校检测温的准确性，实现了开机自检，能够及时发现问题，保证了测温的准确性，规避了事故风险，同时避免了人工巡检，使得降低了检测成本。
请同时参阅图1至图2，本发明提供了一种NTC测温电路的较佳实施例。
如图1所示，本发明提供的一种NTC测温电路，其可用于加热回路中，所述NTC测温电路包括：测温模块100、开关模块200、控制模块300与检测模块400。所述控制模块300分别与所述测温模块100、所述检测模块400、所述开关模块200电连接，所述开关模块200分别与所述测温模块100、所述检测模块400电连接。其中，所述测温模块100用于监测加热回路中被测部的温度并得到第一温度数据，所述开关模块200用于根据所述控制模块300输出的能使信号切换与所述测温模块100、所述检测模块400之间的通断，所述检测模块400用于校检测温电路中的温度 并得到第二温度数据，所述控制模块300用于获取第一温度数据并根据第一温度数据调节加热回路中被测部的温度，以及用于获取所述第二温度数据并根据所述第二温度数据判断测温的准确性。
具体地，所述测温模块100设置在加热回路中，可以监测加热回路中被测部的温度以得到第一温度数据，并能够将监测温度反馈给所述控制模块300，所述控制模块300能够根据第一温度数据来调控加热回路中气体的温度。为了保证测温的准确性，本申请在NTC测温电路中新增检测模块400，以在开机时进行自检，使能够校检测温电路中的温度并得到第二温度数据，所述控制模块300能够根据所述第二温度数据判断测温的准确性。可见，本申请提供的NTC测温电路，其通过测温模块100来监测加热管路中被测部的温度，并在开机时通过检测模块400来校检测温的准确性，实现了开机自检，能够及时发现问题，保证了测温的准确性，规避了事故风险，可靠性高，同时避免了人工巡检，使得降低了检测成本。
请参阅图2，在一个实施例的进一步地实施方式中，所述测温模块100包括：NTC热敏电阻，所述NTC热敏电阻RTH的一端用于与所述开关模块200电连接，所述NTC热敏电阻RTH的另一端与所述控制模块300电连接并接地。
具体地，所述NTC热敏电阻RTH位于温度数据线中，并部分通过安装孔等方式连接被被测部，例如检测加热呼吸回路(应用于呼吸机时)的气体温度，所述NTC热敏电阻RTH通过所述开关模块200与电源连接，以通过电源为NTC热敏电阻RTH供电，且所述NTC热敏电阻RTH还与所述控制模块300电连接，当所述NTC热敏电阻RTH与所述开关模块200处于导通状态时，能够将加热回路中的温度反馈至所述控制模块300，以实现对加热回路中气体的温度的监测。其中，在呼吸机中，加热回路指的是用于呼吸设备用的管路，其中内部设置有发热丝，其具有湿化和加热气体的作用。
请继续参阅图2，在一个实施例的进一步地实施中，所述检测模块400包括：若干检测电阻，所述检测电阻的一端用于与所述开关模块200电连接，所述检测电阻的另一端与所述控制模块300电连接。
请继续参阅图2，进一步地，所述开关模块200包括：多路开关SW，所述多路开关SW分别连接所述控制模块300与供电电源(可以是恒流源或恒压源)，所述多路开关SW还用于连接所述NTC热敏电阻RTH与所述检测电阻。
具体地，所述检测电阻与所述NTC热敏电阻RTH通过所述多路开关SW与所述控制模块300连接，通过所述控制模块300可以控制多路开关实现对NTC热敏电阻RTH与所述检测电阻的切换，开机时，首先使所述检测电阻导通，以实现开机自检，当检测合格后再切换至所述NTC热敏电阻RTH，以实现对加热回路的温度监测，当然，若自检时不合格，则发布故障信号告知用户进行维检修后再正常开机。
在一些实施例中，所述检测电阻为标准电阻，该标准电阻具有固定的阻值，检测时用于替代NTC热敏电阻，得到一个预期的温度来进行检测，例如：NTC热敏电阻RTH为2.252KΩ时，那么使用标准电阻2.2KΩ时设备显示温度为25.5℃，使用标准电阻1KΩ时设备显示温度为44.5℃，若显示的温度误差在+/-0.5°范围内则说明合格，可以正常开机，否则说明测温电路存在故障，不合格，可以通过声或光信号灯来发布故障信号，以提醒用户需要进行检修。
请继续参阅图2，在一些实施例中，所述检测电阻设置为两个，为第一检测电阻R1与第二检测电阻R2，其分别与所述多路开关SW的第1脚和第2脚连接，而所述NTC热敏电阻RTH则与所述多路开关的第3脚连接。在开机自检时，可以通过所述控制模块300依次切换各个阻值不相等的检测电阻，这样，若所有的检测电阻的显示温度都合格，则可以正常开机。可以理解的是，检测电阻的数量越多，那么检测的结果则越精确，在实际应用中，可以根据实际情况来设置检测电阻的数量。
请继续参阅图2，在一个实施例的进一步地实施方式中，所述控制模块300包括：单片机MCU，所述单片机MCU的输入端与所述测温模块100、检测模块400电连接，所述单片机MCU的输出端与所述开关模块200电连接。
具体地，本申请通过单片机MCU来实现所述多路开关SW的切换，以实现设备的自检。进一步地，所述NTC测温电路还包括：运算放大器OPA，所述运算放大器OPA的输入端与所述NTC热敏电阻RTH、所述检测电阻电连接，所述运算放大器 OPA的输出端与所述单片机MCU电连接，其中，所述运算放大器OPA的第1脚连接所述单片机MCU，所述运算放大器OPA的第2脚连接所述多路开关SW的公共端COM，所述运算放大器OPA的第3脚连接所述NTC热敏电阻RTH、所述第一检测电阻R1和所述第二检测电阻R2，通过所述运算放大器OPA采集所述NTC热敏电阻RTH、所述第一检测电阻R1和所述第二检测电阻R2的电压来测量温度。在一些实施例中，所述单片机的型号可以为MSP430。
在一些实施例中，本发明还提供了一种呼吸机，所述呼吸机包括：加热回路以及如上所述的NTC测温电路；其中，所述测温模块与所述检测模块设置在所述加热回路中。具体如上所述，在此不再赘述。
请参阅图3，在一些实施例中，所述呼吸机还包括：显示器，所述显示器与所述控制模块电连接，当检测到测温电路存在故障时，可以在显示屏上进行显示，以发出故障信号。可以理解的是，在一些实施例中，还可以以报警灯或者喇叭等方式来实现故障信号的发布。
请参阅图3，在一些实施例中，本发明还提供了一种呼吸机开机自检方法，应用于上述所述的呼吸机中，该方法包括：
S100、通过检测模块获取呼吸机的测温电路的温度数据；
S200、通过控制模块将所述温度数据与预设温度值进行比较，若所述温度数据在误差范围内，则控制呼吸机正常开机；
S300、通过测温模块对加热回路中被测部的气体的温度进行监测，并通过所述控制模块调节加热回路中气体的温度。
具体地，在呼吸机开机时，首先通过检测模块来校检测温的准确性，若测得的温度在误差范围内，则呼吸机正常开机即可，否则提醒用户需要检修，以达到开机自检的目的。当正常开机后，则可以通过测温模块对加热回路中被测部的气体的温度进行实时监测，并将测得的温度数据反馈给控制模块，控制模块可以根据测得的温度数据对加热回路中气体的温度进行调节。
综上所述，本发明所提供的一种NTC测温电路、呼吸机以及呼吸机开机自检方 法，其中，所述NTC测温电路用于加热回路中，所述NTC测温电路包括：测温模块、开关模块、控制模块与检测模块；所述控制模块分别与所述测温模块、所述检测模块、所述开关模块电连接；所述开关模块分别与所述测温模块、所述检测模块电连接；所述测温模块用于监测加热回路中被测部的温度并得到第一温度数据；所述开关模块用于根据所述控制模块输出的能使信号切换与所述测温模块、所述检测模块之间的通断；所述检测模块用于校检测温电路中的温度并得到第二温度数据；所述控制模块用于获取第一温度数据并根据第一温度数据调节加热回路中被测部的温度，以及用于获取所述第二温度数据并根据所述第二温度数据判断测温的准确性。本发明通过测温模块来监测加热管路中被测部的温度，并在开机时通过检测模块来校检测温的准确性，实现了开机自检，能够及时发现问题，保证了测温的准确性，规避了事故风险，同时避免了人工巡检，使得降低了检测成本。
应当理解的是，本发明的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (10)

  1. 一种NTC测温电路，用于加热回路中，其特征在于，包括：测温模块、开关模块、控制模块与检测模块；
    所述控制模块分别与所述测温模块、所述检测模块、所述开关模块电连接；
    所述开关模块分别与所述测温模块、所述检测模块电连接；
    所述测温模块用于监测加热回路中被测部的温度并得到第一温度数据；
    所述开关模块用于根据所述控制模块输出的能使信号切换与所述测温模块、所述检测模块之间的通断；
    所述检测模块用于校检测温电路的温度并得到第二温度数据；
    所述控制模块用于获取第一温度数据并根据第一温度数据调节加热回路中被测部的温度，以及用于获取所述第二温度数据并根据所述第二温度数据判断测温的准确性。
  2. 根据权利要求1所述的NTC测温电路，其特征在于，所述测温模块包括：NTC热敏电阻，所述NTC热敏电阻的一端用于与所述开关模块电连接，所述NTC热敏电阻的另一端与所述控制模块电连接并接地。
  3. 根据权利要求2所述的NTC测温电路，其特征在于，所述检测模块包括：若干检测电阻，所述检测电阻的一端用于与所述开关模块电连接，所述检测电阻的另一端与所述控制模块电连接。
  4. 根据权利要求1所述的NTC测温电路，其特征在于，所述检测电阻为标准电阻。
  5. 根据权利要求3所述的NTC测温电路，其特征在于，所述开关模块包括：多路开关，所述多路开关分别连接所述控制模块与供电电源，所述多路开关还用于连接所述NTC热敏电阻与所述检测电阻。
  6. 根据权利要求5所述的NTC测温电路，其特征在于，所述控制模块包括：单片机，所述单片机的输入端与所述测温模块、检测模块电连接，所述单片机的输出端与所述开关模块电连接。
  7. 根据权利要求6所述的NTC测温电路，其特征在于，所述NTC测温电路还 包括：运算放大器，所述运算放大器的输入端与所述NTC热敏电阻、所述检测电阻电连接，所述运算放大器的输出端与所述单片机电连接。
  8. 一种呼吸机，其特征在于，所述呼吸机包括：
    加热回路；
    如权利要求1-7任一项所述的NTC测温电路；其中，所述测温模块与所述检测模块设置在所述加热回路中。
  9. 根据权利要求8所述的呼吸机，其特征在于，所述呼吸机还包括：
    显示器，所述显示器与所述控制模块电连接。
  10. 一种呼吸机开机自检方法，应用于权利要求8或9所述的呼吸机中，其特征在于，包括：
    通过检测模块获取呼吸机的测温电路的温度数据；
    通过控制模块将所述温度数据与预设温度值进行比较，若所述温度数据在误差范围内，则控制呼吸机正常开机；
    通过测温模块对加热回路中被测部的气体的温度进行监测，并通过所述控制模块调节加热回路中气体的温度。
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