WO2022193772A1 - 一种加热回路保护电路、呼吸加热电路及呼吸辅助设备 - Google Patents

一种加热回路保护电路、呼吸加热电路及呼吸辅助设备 Download PDF

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WO2022193772A1
WO2022193772A1 PCT/CN2021/141035 CN2021141035W WO2022193772A1 WO 2022193772 A1 WO2022193772 A1 WO 2022193772A1 CN 2021141035 W CN2021141035 W CN 2021141035W WO 2022193772 A1 WO2022193772 A1 WO 2022193772A1
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Prior art keywords
circuit
protection
sub
heating
diode
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PCT/CN2021/141035
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English (en)
French (fr)
Inventor
赵军
徐结兵
于海滨
王立婷
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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 EP21921678.5A priority Critical patent/EP4087078A4/en
Priority to US17/802,369 priority patent/US20240022062A1/en
Priority to JP2022549388A priority patent/JP7457823B2/ja
Publication of WO2022193772A1 publication Critical patent/WO2022193772A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/085—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current making use of a thermal sensor, e.g. thermistor, heated by the excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
    • 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
    • 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
    • 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
    • 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
    • A61M2205/60—General characteristics of the apparatus with identification means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device

Definitions

  • Existing respiratory aids are usually equipped with multiple pipelines, without an identification element and a temperature detection circuit.
  • the detection circuit detects the temperature of the inlet and outlet of the pipeline, and performs the corresponding breathing mode.
  • the circuit may be reversely connected or the instantaneous voltage is too high when the power is connected.
  • the invention provides a heating circuit protection circuit for connecting with the heating circuit
  • the heating circuit protection circuit includes a collection subcircuit, a suppression subcircuit, a protection subcircuit and a discharge subcircuit; the collection subcircuit collects the The input voltage of the protection sub-circuit is transmitted to the suppression sub-circuit; the input voltage is clamped by the suppression sub-circuit, and the current is released through the discharge sub-circuit; Short circuit protection when high.
  • the protection subcircuit includes:
  • a first protection unit for short-circuit protection of the heating wire
  • a second protection unit for short-circuit protection of the temperature detection module of the heating circuit
  • One end of the first protection unit is connected to the input end of the heating wire, the other end of the first protection unit is connected to the first power supply, and one end of the second protection unit is connected to the collection sub-circuit in parallel input voltage, the other end of the second protection unit is connected to the temperature detection module and the identification module of the heating circuit, one end of the third protection unit is connected to the suppression sub-circuit, and the third protection unit is The other end is connected to the discharge sub-circuit.
  • the second protection unit includes a first fuse, a second fuse and a third fuse; one end of the first fuse is connected to the input end of the first diode and connected to the first input voltage ; the other end of the first fuse is connected to the temperature detection module; one end of the second fuse is connected to the input end of the second diode and connected to the second input voltage; the first The other end of the two fuses is connected to the temperature detection module; one end of the third fuse is connected to the input end of the third diode and connected to the third input voltage; The other end is connected with the identification module.
  • the suppressing subcircuit includes a TVS diode, and the negative terminal of the TVS diode is connected to the output end of the first diode, the output end of the second diode and the output end of the third diode , the positive terminal of the TVS diode is connected to one terminal of the third protection unit.
  • the present invention also provides a breathing heating circuit, comprising a heating circuit and the heating circuit protection circuit described above, the heating protection circuit is connected to the heating circuit, and a short circuit occurs in the heating circuit When the heating circuit is short-circuit protected.
  • the heating circuit protection circuit is used to connect with the heating circuit, and the heating circuit protection circuit includes a collection sub-circuit, a suppression sub-circuit, a protection sub-circuit and a discharge sub-circuit;
  • the collection sub-circuit collects the input voltage of the protection sub-circuit and transmits it to the suppression sub-circuit; the input voltage is clamped by the suppression sub-circuit, and the current is released through the discharge sub-circuit;
  • the protection subcircuit performs short-circuit protection when the current is too high.
  • Fig. 1 is the structural block diagram of the heating circuit protection circuit provided by the present invention
  • FIG. 2 is a circuit diagram of the breathing heating circuit provided by the present invention.
  • the existing heating circuit 10 generally includes a plurality of IO ports, which respectively supply power to the heating wire H1, the temperature detection device, etc., or communicate with the identification module IC1.
  • six IO ports are used. Take the mouth as an example.
  • the first IO port is connected to the positive pole of the first power supply to supply power to the heating wire H1; the second IO port is connected to the negative pole of the first power supply, so that the heating wire H1 forms a loop; the first input voltage passes through the third IO The port supplies power to the first temperature detection device RV1; the second input voltage supplies power to the second temperature detection device RV2 through the fourth IO port; the third input voltage communicates with the identification module IC1 through the fifth IO port; The sixth IO port is used to ground the temperature detection device and the identification module IC1.
  • the protection sub-circuit 230 includes: a first protection unit for short-circuit protection for the heating wire H1 , and a second protection unit for short-circuit protection for the temperature detection module 100 of the heating circuit 10 unit, a third protection unit for short-circuit protection of the discharge sub-circuit 240; one end of the first protection unit is connected to the input end of the heating wire H1, and the other end of the first protection unit is connected to the first protection unit.
  • one end of the second protection unit is connected to the acquisition sub-circuit 210 and connected to the input voltage, and the other end of the second protection unit is connected to the temperature detection module 100 and the identification module IC1 of the heating circuit 10 , one end of the third protection unit is connected to the suppression sub-circuit 220 , and the other end of the third protection unit is connected to the discharge sub-circuit 240 .
  • the overcurrent protection is performed on the heating wire H1 by the first protection unit, and when the current is too high, the loop of the heating wire H1 can be disconnected by the first protection unit, so that the The heating wire H1 is powered off to achieve the effect of overcurrent protection.
  • the first protection unit 232 includes a fourth fuse F4, one end of the fourth fuse F4 is connected to the input end of the heating wire H1, the fourth fuse F4 The other end is connected to the positive pole of the first power supply.
  • the second protection unit 231 includes a first fuse F1, a second fuse F2 and a third fuse F3; one end of the first fuse F1 is connected to the first and second fuses
  • the input end of the pole tube D1 is connected to the first input voltage; the other end of the first fuse F1 is connected to the temperature detection module 100; one end of the second fuse F2 is connected to the second two
  • the input end of the pole tube D2 is connected to the second input voltage; the other end of the second fuse F2 is connected to the temperature detection module 100;
  • one end of the third fuse F3 is connected to the third and second fuses
  • the input end of the pole tube D3 is connected to the third input voltage; the other end of the third fuse tube F3 is connected to the identification module IC1.
  • the third protection unit 233 includes a fifth fuse F5, one end of the fifth fuse F5 and the positive terminal of the suppression sub-circuit 220, the temperature detection module 100 and the identification module IC1 is connected, and the other end of the fifth fuse F5 is connected to the discharge sub-circuit 240 .
  • the first fuse F1, the second fuse F2, the third fuse F3, the fourth fuse F4 and the fifth fuse F5 are all fused when the current is too large, so that the circuit is disconnected and the overcurrent protection is realized. Purpose.
  • the suppression sub-circuit 220 includes a TVS1 diode, the negative terminal of the TVS1 is connected to the output end of the first diode D1 and the second diode.
  • the output terminal of D2 is connected to the output terminal of the third diode D3, and the positive terminal of the TVS1 is connected to one terminal of the third protection unit.
  • the transient suppression diode TVS1 receives the voltages collected by the first diode D1 , the second diode D2 and the third diode D3 respectively, and maintains the voltage at a preset value , by outputting the three-way current to the fifth fuse F5, and outputting the current to the discharge sub-circuit 240 through the fifth fuse F5, and the discharge sub-circuit 240 discharges the current to the ground.
  • the preset value of the clamping voltage of the TVS1 diode can be set as required, which is not limited here.
  • the bleeder circuit 240 includes a fourth diode D4, a first resistor R1 and a first switch Q1, and the input end of the fourth diode D4 is connected to a control voltage , the output end of the fourth diode D4 is connected to one end of the first resistor R1 and the control end of the first switch tube Q1, and the input end of the first switch tube Q1 is connected to the third protection unit , the output end of the first switch tube Q1 is connected to the other end of the first resistor R1 and grounded.
  • the fourth diode D4 is used to connect the second power supply and output it to the control terminal of the first switch transistor Q1, and the first switch transistor Q1 is an NMOS transistor. Therefore, the The control terminal of the first switch tube Q1 is the gate, the input terminal of the first switch tube Q1 is the drain/source of the NMOS tube, and the output terminal of the first switch tube Q1 is the source/source of the NMOS tube. drain. In this embodiment, the input terminal of the first switch transistor Q1 is connected to the current and discharged to the ground through the output terminal of the first switch transistor Q1, so as to realize the normal discharge of the current.
  • the first switch tube may also be a PMOS tube or a triode, etc., and only needs to be able to perform a current discharge function, which is not limited here.
  • the heating circuit protection circuit 20 further includes a temperature detection sub-circuit 250, the temperature detection sub-circuit 250 is connected to the second power supply, and the output end of the temperature detection sub-circuit 250 is connected to the ground.
  • the temperature detection sub-circuit 250 includes a third temperature detection device RV3, and the temperature detection of the heating circuit protection circuit 20 is realized by the third temperature detection device RV3.
  • the main control The module 30 controls the power off to prevent the heating circuit protection circuit 20 from losing its protective effect due to overheating.
  • first temperature detection device RV1, the second temperature detection device RV2 and the third temperature detection device RV3 can all be temperature sensors, thermistors, etc., which are not limited herein.
  • the present invention also provides a breathing heating circuit, including the heating circuit 10 and the above-mentioned heating circuit protection circuit 20, by which the heating protection circuit and the The heating circuit 10 is connected, and when the heating circuit 10 is short-circuited, the short-circuit protection is performed on the heating circuit 10 .
  • the heating circuit 10 includes a heating wire H1, a first temperature detection device RV1, a second temperature detection device RV2, a third temperature detection device RV3 and an identification module IC1;
  • the input end is connected to the protection sub-circuit 230, the output end of the heating wire H1 is connected to the negative electrode of the first power supply, one end of the first heating device, one end of the second temperature detection device RV2 and the identification
  • the IO ports of the module IC1 are all connected to the protection sub-circuit 230, and the other end of the first temperature detection device RV1, the other end of the second temperature detection device RV2, and the ground terminal of the identification module IC1 are all connected to the suppression device RV1.
  • the input terminal of the sub-circuit 220 is connected to the protection sub-circuit 230 .
  • the identification module is specifically an identification chip, which can store the temperature data detected by the temperature detection module, and upload the temperature data when the main control module needs it.
  • the collection sub-circuit 210 collects the input voltage of the protection sub-circuit 230 and transmits it to the suppression sub-circuit 220; the suppression sub-circuit 220 clamps the input voltage bit, and release the current through the bleeder sub-circuit 240; short-circuit protection is performed by the protection sub-circuit 230 when the current is too high.
  • This embodiment realizes both voltage clamping protection and overcurrent protection, so that the heating circuit 10 avoids excessive voltage, and at the same time realizes the function of overcurrent protection, and avoids the safety risk caused by the instantaneous high voltage triggering the spark. Since the heating circuit protection circuit 20 has been described in detail above, it will not be repeated here.
  • the present invention also provides a breathing assistance device, comprising a device body, a circuit board is arranged in the device body, and the breathing heating circuit as described above is arranged on the circuit board. Since the breathing heating circuit has been described in detail above, it will not be repeated here.
  • the present invention provides a heating circuit protection circuit for connecting with a heating circuit
  • the heating circuit protection circuit includes a collection sub-circuit, a suppression sub-circuit, a protection sub-circuit and a discharge sub-circuit;
  • the collection sub-circuit collects the input voltage of the protection sub-circuit and transmits it to the suppression sub-circuit; the input voltage is clamped by the suppression sub-circuit, and the current is released through the discharge sub-circuit;
  • the protection subcircuit performs short-circuit protection when the current is too high.
  • the invention monitors the voltage of the heating circuit and suppresses the input voltage through the suppression sub-circuit, realizes over-voltage protection through voltage clamping, and realizes over-current protection through the protection sub-circuit when the circuit current is too high, thereby avoiding the triggering of sparks due to instantaneous high voltage. the resulting security risks.

Abstract

提供了一种加热回路保护电路(20)、呼吸加热电路及呼吸辅助设备，其中，加热回路保护电路(20)用于与加热回路(10)连接，其包括采集子电路(210)、抑制子电路(220)、保护子电路(230)以及泄放子电路(240)；由采集子电路(210)采集保护子电路(230)的输入电压，并传至抑制子电路(220)中；由抑制子电路(220)对输入电压进行钳位，并通过泄放子电路(240)释放电流；由保护子电路(230)在电流过高时进行短路保护。通过监控加热回路(10)的电压同时通过抑制子电路(220)抑制输入电压，通过电压钳位实现过压保护，并在电路电流过高时通过保护子电路(230)实现过流保护，避免了因瞬时高压触发电火花所引起的安全风险。

Description

一种加热回路保护电路、呼吸加热电路及呼吸辅助设备 技术领域
本发明涉及领域，特别涉及一种加热回路保护电路、呼吸加热电路及呼吸辅助设备。
背景技术
现有的呼吸辅助设备(例如呼吸机)通常配有多种管路，没跟管路带有一个身份识别元件和温度检测电路，呼吸辅助设备通过身份识别元件来识别管路信息，并通过温度检测电路检测管路进气口和出气口的温度，进行相对应的呼吸工作模式。
但是现有的呼吸辅助设备的加热回路在使用过程中，可能由于线路接反接错或者接电时瞬时电压过高等情况，这会出现漏电接触火花，有极大的安全风险。
因此现有技术还有待改进和提高。
发明内容
鉴于上述现有技术的不足之处，本发明的目的在于提供一种加热回路保护电路、呼吸加热电路及呼吸辅助设备，通过监控加热回路的电压同时通过抑制子电路抑制输入电压，通过电压钳位实现过压保护，并在电路电流过高时通过保护子电路实现过流保护，避免了因瞬时高压触发电火花所引起的安全风险。
为了达到上述目的，本发明采取了以下技术方案：
本发明提供一种加热回路保护电路，用于与加热回路连接，所述加热回路保护电路包括采集子电路、抑制子电路、保护子电路以及泄放子电路；由所述采集子电路采集所述保护子电路的输入电压，并传至抑制子电路中；由所述抑制子电路对所述输入电压进行钳位，并通过所述泄放子电路释放电流；由所述保护子电路在电流过高时进行短路保护。
所述采集子电路包括第一二极管、第二二极管和第三二极管；所述第一二极管的输入端、第二二极管的输入端和第三二极管的输入端与所述保护子电路连接，并分别采集第一输入电压、第二输入电压和第三输入电压；所述第一二极管的输出端、第二二极管的输出端和第三二极管的输出端均与所述抑制子电路连接。
所述保护子电路包括：
用于对加热丝进行短路保护的第一保护单元；
用于对加热回路的温度检测模块进行短路保护的第二保护单元；
用于对泄放子电路进行短路保护的第三保护单元；
所述第一保护单元的一端与所述加热丝的输入端连接，所述第一保护单元的另一端接入第一电源，所述第二保护单元的一端与所述采集子电路连接并接入输入电压，所述第二保护单元的另一端与所述加热回路的温度检测模块及识别模块连接，所述第三保护单元的一端与所述抑制子电路连接，所述第三保护单元的另一端与所述泄放子电路连接。
所述第二保护单元包括第一保险管、第二保险管和第三保险管；所述第一保险管的一端与所述第一二极管的输入端连接，并接入第一输入电压；所述第一保险管的另一端与所述温度检测模块连接；所述第二保险管的一端与所述第二二极管的输入端连接，并接入第二输入电压；所述第二保险管的另一端与所述温度检测模块连接；所述第三保险管的一端与所述第三二极管的输入端连接，并接入第三输入电压；所述第三保险管的另一端与识别模块连接。
所述抑制子电路包括瞬态抑制二极管，所述瞬态抑制二极管的负极端与所述第一二极管的输出端、第二二极管的输出端和第三二极管的输出端连接，所述瞬态抑制二极管的正极端与所述第三保护单元的一端连接。
所述泄放子电路包括第四二极管、第一电阻和第一开关管，所述第四二极管的输入 端接入控制电压，所述第四二极管的输出端与所述第一电阻的一端及第一开关管的控制端连接，所述第一开关管的输入端与所述第三保护单元连接，所述第一开关管的输出端与所述第一电阻的另一端连接并接地。
还包括温度检测子电路，所述温度检测子电路接入第二电源，所述温度检测子电路的输出端与接地。
基于上述的加热回路保护电路，本发明还提供一种呼吸加热电路，包括加热回路和上文所述的加热回路保护电路，由所述加热保护电路与所述加热回路连接，在加热回路发生短路时，对所述加热回路进行短路保护。
所述加热回路包括加热丝、第一温度检测器件、第二温度检测器件、第三温度检测器件和识别模块；所述加热丝的输入端与所述保护子电路连接，所述加热丝的输出端与第一电源的负极连接，所述第一加热器件的一端、所述第二温度检测器件的一端和所述识别模块的IO口均与所述保护子电路连接，所述第一温度检测器件的另一端、第二温度检测器件的另一端及所述识别模块的接地端均与所述抑制子电路的输入端及保护子电路连接。
基于上述的呼吸加热电路，本发明还提供一种呼吸辅助设备，包括设备本体，所述设备本体中设置有电路板，所述电路板上设置有如上文所述的呼吸加热电路。
相较于现有技术，本发明提供的加热回路保护电路，用于与加热回路连接，所述加热回路保护电路包括采集子电路、抑制子电路、保护子电路以及泄放子电路；由所述采集子电路采集所述保护子电路的输入电压，并传至抑制子电路中；由所述抑制子电路对所述输入电压进行钳位，并通过所述泄放子电路释放电流；由所述保护子电路在电流过高时进行短路保护。本发明通过监控加热回路的电压同时通过抑制子电路抑制输入电压，通过电压钳位实现过压保护，并在电路电流过高时通过保护子电路实现过流保护，避免了因瞬时高压触发电火花所引起的安全风险。
附图说明
图1为本发明提供的加热回路保护电路的结构框图；
图2为本发明提供的呼吸加热电路的电路图。
具体实施方式
本发明提供一种加热回路保护电路、呼吸加热电路及呼吸辅助设备，通过监控加热回路的电压同时通过抑制子电路抑制输入电压，通过电压钳位实现过压保护，并在电路电流过高时通过保护子电路实现过流保护，避免了因瞬时高压触发电火花所引起的安全风险。
本发明的具体实施方式是为了便于对本发明的技术构思、所解决的技术问题、构成技术方案的技术特征和带来的技术效果做更为详细的说明。需要说明的是，对于这些实施方式的解释说明并不构成对本发明的保护范围的限定。此外，下文所述的实施方式中所涉及的技术特征只要彼此之间不构成冲突就可以相互组合。
鉴于现有技术存在的问题，请参阅图1，本发明提供一种加热回路保护电路20，用于与加热回路10连接，所述加热回路保护电路20包括采集子电路210、抑制子电路220、保护子电路230以及泄放子电路240。所述加热回路10一般由主控模块30进行供电和控制，所述主控模块30可以是呼吸辅助设备的主控芯片，也可以是外接的主控电路等，在此不做限定。在所述主控模块30和加热回路10之间设置加热回路保护电路20避免加热回路10因瞬时高压触发电火花所引起的安全风险。
具体的，请一并参阅图2，由所述采集子电路210采集所述保护子电路230的输入电压，并传至抑制子电路220中；由所述抑制子电路220对所述输入电压进行钳位，并通过所述泄放子电路240释放电流；由所述保护子电路230在电流过高时进行短路保护。本实施例同时实现了电压钳位保护和过流保护，使得加热回路10避免了电压过高，同 时实现了过流保护的功能。
具体的，请继续参阅图2，所述采集子电路210包括第一二极管D1、第二二极管D2和第三二极管D3；所述第一二极管D1的输入端、第二二极管D2的输入端和第三二极管D3的输入端与所述保护子电路230连接，并分别采集第一输入电压、第二输入电压和第三输入电压；所述第一二极管D1的输出端、第二二极管D2的输出端和第三二极管D3的输出端均与所述抑制子电路220连接。
具体实施时，本实施例中，现有的加热回路10一般包括多个IO口，分别为加热丝H1、温度检测器件等进行供电，或者与识别模块IC1进行通信，本实施例以六个IO口为例进行说明。具体的，第一IO口接入第一电源正极为加热丝H1进行供电；所述第二IO口与第一电源负极连接，使得加热丝H1形成回路；所述第一输入电压通过第三IO口为第一温度检测器件RV1供电；所述第二输入电压通过第四IO口为第二温度检测器件RV2供电；所述第三输入电压通过第五IO口与所述识别模块IC1进行通信；所述第六IO口则用于使温度检测器件和识别模块IC1接地。当为加热回路10通电时，通过所述第一二极管D1、第二二极管D2和第三二极管D3分别采集第三IO口、第四IO口和第五IO口的电压值输出至抑制子电路220，通过抑制子电路220实现电压钳位，使得即使通电瞬时电压过高也不会使后级的加热回路10烧坏，更不会产生电火花。
进一步的，请继续参阅图2，所述保护子电路230包括：用于对加热丝H1进行短路保护的第一保护单元，用于对加热回路10的温度检测模块100进行短路保护的第二保护单元，用于对泄放子电路240进行短路保护的第三保护单元；所述第一保护单元的一端与所述加热丝H1的输入端连接，所述第一保护单元的另一端接入第一电源，所述第二保护单元的一端与所述采集子电路210连接并接入输入电压，所述第二保护单元的另一端与所述加热回路10的温度检测模块100及识别模块IC1连接，所述第三保护单元的一端与所述抑制子电路220连接，所述第三保护单元的另一端与所述泄放子电路 240连接。
具体实施时，本实施例中，通过第一保护单元对所述加热丝H1进行过流保护，当电流过高时可通过所述第一保护单元断开所述加热丝H1的回路，以使所述加热丝H1断电，达到过流保护的效果。
具体的，请继续参阅图2，所述第一保护单元232包括第四保险管F4，所述第四保险管F4的一端与所述加热丝H1的输入端连接，所述第四保险管F4的另一端与所述第一电源的正极连接。
进一步的，请继续参阅图2，所述第二保护单元231包括第一保险管F1、第二保险管F2和第三保险管F3；所述第一保险管F1的一端与所述第一二极管D1的输入端连接，并接入第一输入电压；所述第一保险管F1的另一端与所述温度检测模块100连接；所述第二保险管F2的一端与所述第二二极管D2的输入端连接，并接入第二输入电压；所述第二保险管F2的另一端与所述温度检测模块100连接；所述第三保险管F3的一端与所述第三二极管D3的输入端连接，并接入第三输入电压；所述第三保险管F3的另一端与识别模块IC1连接。
进一步的，请继续参阅图2，所述第三保护单元233包括第五保险管F5，所述第五保险管F5的一端与所述抑制子电路220的正极端、温度检测模块100及识别模块IC1连接，所述第五保险管F5的另一端与所述泄放子电路240连接。
所述第一保险管F1、第二保险管F2、第三保险管F3、第四保险管F4和第五保险管F5均在电流过大时熔断，以使得回路断开，实现过流保护的目的。
具体的，请继续参阅图2，所述抑制子电路220包括瞬态抑制二极管TVS1，所述瞬态抑制二极管TVS1的负极端与所述第一二极管D1的输出端、第二二极管D2的输出端和第三二极管D3的输出端连接，所述瞬态抑制二极管TVS1的正极端与所述第三保护单元的一端连接。
具体所述，本实施例中，所述瞬态抑制二极管TVS1分别接收第一二极管D1、第二二极管D2和第三二极管D3采集到的电压，将电压维持在预设值，通过将三路的电流输出至所述第五保险管F5，通过所述第五保险管F5输出至泄放子电路240，由所述泄放子电路240将电流泄放到地。需要说明的是，所述瞬态抑制二极管TVS1钳位电压的预设值可根据需要进行设定，在此不做限定。
进一步的，请继续参阅图2，所述泄放子电路240包括第四二极管D4、第一电阻R1和第一开关管Q1，所述第四二极管D4的输入端接入控制电压，所述第四二极管D4的输出端与所述第一电阻R1的一端及第一开关管Q1的控制端连接，所述第一开关管Q1的输入端与所述第三保护单元连接，所述第一开关管Q1的输出端与所述第一电阻R1的另一端连接并接地。
具体实施时，本实施例中，通过所述第四二极管D4接入第二电源输出至所述第一开关管Q1的控制端，所述第一开关管Q1为NMOS管，因此，所述第一开关管Q1的控制端为栅极，所述第一开关管Q1的输入端为NMOS管的漏极/源极，所述第一开关管Q1的输出端为NMOS管的源极/漏极。本实施例通过所述第一开关管Q1的输入端接入电流经过第一开关管Q1输出端泄放到地，实现了电流的正常泄放。可选的，所述第一开关管也可以是PMOS管或者三极管等，只需要能事项电流泄放功能即可，在此不做限定。
更进一步的，请继续参阅图2，所述加热回路保护电路20还包括温度检测子电路250，所述温度检测子电路250接入第二电源，所述温度检测子电路250的输出端与接地。具体的，所述温度检测子电路250包括第三温度检测器件RV3，通过所述第三温度检测器件RV3实现对所述加热回路保护电路20的温度检测，在其温度过高时，通过主控模块30控制断电，避免所述加热回路保护电路20温度过高失去保护效果。
需要说明的是，所述第一温度检测器件RV1、第二温度检测器件RV2和第三温度 检测器件RV3均可以是温度传感器、热敏电阻等，在此不做限定。
基于上述的加热回路保护电路20，请继续参阅图2，本发明还提供一种呼吸加热电路，包括加热回路10和上文所述的加热回路保护电路20，由所述加热保护电路与所述加热回路10连接，在加热回路10发生短路时，对所述加热回路10进行短路保护。
具体的，请继续参阅图2，所述加热回路10包括加热丝H1、第一温度检测器件RV1、第二温度检测器件RV2、第三温度检测器件RV3和识别模块IC1；所述加热丝H1的输入端与所述保护子电路230连接，所述加热丝H1的输出端与第一电源的负极连接，所述第一加热器件的一端、所述第二温度检测器件RV2的一端和所述识别模块IC1的IO口均与所述保护子电路230连接，所述第一温度检测器件RV1的另一端、第二温度检测器件RV2的另一端及所述识别模块IC1的接地端均与所述抑制子电路220的输入端及保护子电路230连接。所述识别模块具体为识别芯片，可存储温度检测模块所检测到的温度数据，并在主控模块需要时上传所述温度数据。
具体实施时，本实施例中，由所述采集子电路210采集所述保护子电路230的输入电压，并传至抑制子电路220中；由所述抑制子电路220对所述输入电压进行钳位，并通过所述泄放子电路240释放电流；由所述保护子电路230在电流过高时进行短路保护。本实施例同时实现了电压钳位保护和过流保护，使得加热回路10避免了电压过高，同时实现了过流保护的功能，避免了因瞬时高压触发电火花所引起的安全风险。由于所述加热回路保护电路20已在上文进行了详细描述，在此不再赘述。
基于上述的呼吸加热电路，本发明还提供一种呼吸辅助设备，包括设备本体，所述设备本体中设置有电路板，所述电路板上设置有如上文所述的呼吸加热电路。由于所述呼吸加热电路已在上文进行了详细描述，在此不再赘述。
综上所述，本发明提供的一种加热回路保护电路，用于与加热回路连接，所述加热回路保护电路包括采集子电路、抑制子电路、保护子电路以及泄放子电路；由所述采集 子电路采集所述保护子电路的输入电压，并传至抑制子电路中；由所述抑制子电路对所述输入电压进行钳位，并通过所述泄放子电路释放电流；由所述保护子电路在电流过高时进行短路保护。本发明通过监控加热回路的电压同时通过抑制子电路抑制输入电压，通过电压钳位实现过压保护，并在电路电流过高时通过保护子电路实现过流保护，避免了因瞬时高压触发电火花所引起的安全风险。
可以理解的是，对本领域普通技术人员来说，可以根据本发明的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本发明所附的权利要求的保护范围。

Claims (10)

  1. 一种加热回路保护电路，其特征在于，用于与加热回路连接，所述加热回路保护电路包括采集子电路、抑制子电路、保护子电路以及泄放子电路；由所述采集子电路采集所述保护子电路的输入电压，并传至抑制子电路中；由所述抑制子电路对所述输入电压进行钳位，并通过所述泄放子电路释放电流；由所述保护子电路在电流过高时进行短路保护。
  2. 根据权利要求1所述的加热回路保护电路，其特征在于，所述采集子电路包括第一二极管、第二二极管和第三二极管；所述第一二极管的输入端、第二二极管的输入端和第三二极管的输入端与所述保护子电路连接，并分别采集第一输入电压、第二输入电压和第三输入电压；所述第一二极管的输出端、第二二极管的输出端和第三二极管的输出端均与所述抑制子电路连接。
  3. 根据权利要求2所述的加热回路保护电路，其特征在于，所述保护子电路包括：
    用于对加热丝进行短路保护的第一保护单元；
    用于对加热回路的温度检测模块进行短路保护的第二保护单元；
    用于对泄放子电路进行短路保护的第三保护单元；
    所述第一保护单元的一端与所述加热丝的输入端连接，所述第一保护单元的另一端接入第一电源，所述第二保护单元的一端与所述采集子电路连接并接入输入电压，所述第二保护单元的另一端与所述加热回路的温度检测模块及识别模块连接，所述第三保护单元的一端与所述抑制子电路连接，所述第三保护单元的另一端与所述泄放子电路连接。
  4. 根据权利要求3所述的加热回路保护电路，其特征在于，所述第二保护单元包括第一保险管、第二保险管和第三保险管；所述第一保险管的一端与所述第一二极管的输入端连接，并接入第一输入电压；所述第一保险管的另一端与所述温度检测模块连接；所述第二保险管的一端与所述第二二极管的输入端连接，并接入第二输入电压；所述第 二保险管的另一端与所述温度检测模块连接；所述第三保险管的一端与所述第三二极管的输入端连接，并接入第三输入电压；所述第三保险管的另一端与识别模块连接。
  5. 根据权利要求4所述的加热回路保护电路，其特征在于，所述抑制子电路包括瞬态抑制二极管，所述瞬态抑制二极管的负极端与所述第一二极管的输出端、第二二极管的输出端和第三二极管的输出端连接，所述瞬态抑制二极管的正极端与所述第三保护单元的一端连接。
  6. 根据权利要求3所述的加热回路保护电路，其特征在于，所述泄放子电路包括第四二极管、第一电阻和第一开关管，所述第四二极管的输入端接入控制电压，所述第四二极管的输出端与所述第一电阻的一端及第一开关管的控制端连接，所述第一开关管的输入端与所述第三保护单元连接，所述第一开关管的输出端与所述第一电阻的另一端连接并接地。
  7. 根据权利要求1所述的加热回路保护电路，其特征在于，还包括温度检测子电路，所述温度检测子电路接入第二电源，所述温度检测子电路的输出端与接地。
  8. 一种呼吸加热电路，其特征在于，包括加热回路和权利要求1-7任意一项所述的加热回路保护电路，由所述加热保护电路与所述加热回路连接，在加热回路发生短路时，对所述加热回路进行短路保护。
  9. 根据权利要求8所述的呼吸加热电路，其特征在于，所述加热回路包括加热丝、第一温度检测器件、第二温度检测器件、第三温度检测器件和识别模块；所述加热丝的输入端与所述保护子电路连接，所述加热丝的输出端与第一电源的负极连接，所述第一加热器件的一端、所述第二温度检测器件的一端和所述识别模块的IO口均与所述保护子电路连接，所述第一温度检测器件的另一端、第二温度检测器件的另一端及所述识别模块的接地端均与所述抑制子电路的输入端及保护子电路连接。
  10. 一种呼吸辅助设备，其特征在于，包括设备本体，所述设备本体中设置有电路 板，所述电路板上设置有如权利要求8或9所述的呼吸加热电路。
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