CN113611199A - Simple respiration simulation device - Google Patents
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Abstract
The invention provides a simple breathing simulation device. The device comprises a breathing module, a regulating system, a wind speed monitoring system, a display system, an operation control system and a power supply. The breathing module comprises an air inlet fan and an air outlet fan which are connected in parallel. The breathing module is arranged in the cranial cavity of the human model. The cranial cavity of the human body model is communicated with the outside through a nasal cavity. The air inlet fan sucks external air into the cranial cavity of the human model. The air outlet fan blows air in the cranial cavity of the manikin to the external environment. The device carries out the simulation of human breathing through the shutoff of control controller and the resistance of connecting different sizes, and for existing breathing analogue means, the installation is simple, and low in cost to can change wind speed, respiratory frequency through operation control system. The air flow simulating the breathing of the human body can be provided, and meanwhile, the air flow simulating the breathing of the human body can be flexibly controlled, and the air flow simulating device is simple and convenient to install and low in manufacturing cost.
Description
Technical Field
The invention relates to the technical field of human body models, in particular to a simple breathing simulation device.
Background
The main physiological functions of the respiratory system are to exchange oxygen and carbon dioxide between the atmosphere and the blood, and to maintain the gaseous environment required for metabolism of various tissues in the body. The physiological processes are closely related to the flow of gas. For human body breathing simulation, the most important part is that two processes of human body exhalation and inhalation can be accurately simulated, and the process change curve conforms to the condition of a real human body.
The respiratory process of the human body is the research focus of a plurality of researchers. The research of the respiratory process needs to be participated in by a respiratory device, and particularly for the research of virus transmission and the like which relates to human ethics, a simulation device for replacing a real subject needs to be found. Manikins or thermal manikins are widely used in various engineering and even medical industries.
However, the breathing apparatus that can correctly simulate the breathing of a human body in the existing manikin is expensive, and a lot of expenses are incurred in maintenance and replacement. The existing breathing simulation device mainly has the following problems that firstly, the manufacturing cost is high, and the device cannot be purchased or used in large batch; secondly, the maintenance is difficult; thirdly, products on the market are basically imported, and domestic breathing simulation devices are blank.
Disclosure of Invention
The invention aims to provide a simple breathing simulation device to solve the problems in the prior art.
The technical scheme adopted for achieving the aim of the invention is that the simple breathing simulation device comprises a breathing module and a wind speed monitoring system which are arranged in a cranial cavity of a human body model, and a regulating system and a calculation control system.
The cranial cavity of the human model is communicated with the outside through the nasal cavity and/or the oral cavity. The breathing module comprises an air inlet fan and an air outlet fan which are connected in parallel. The air inlet fan sucks external air into the cranial cavity of the human model. The air outlet fan blows air in the cranial cavity of the manikin to the external environment. The wind speed monitoring system is arranged beside the breathing module.
The regulation circuitry includes a first regulation circuit and a second regulation circuit. The first adjusting circuit and the air inlet fan are electrically connected between the anode and the cathode of the power supply loop. The first regulating circuit is connected with the air supply fan in series to set an input resistance of the air supply fan. The second regulating circuit and the air outlet fan are electrically connected between the anode and the cathode of the power supply loop. The second regulating circuit is connected with the air outlet fan in series to set the input resistance of the air outlet fan. The first adjusting circuit and the second adjusting circuit both comprise a time schedule controller and a plurality of resistance adjusting branches. The time schedule controller and the controlled end of the resistance value adjusting branch are electrically connected with the operation control system.
When the wind speed monitoring system works, the wind speed monitoring system monitors the air speed of exhalation and air speed of inhalation, and sends the breathing wind speed V and the breathing time T to the operation control system. The operation control system controls the turn-off of the time schedule controller, and then controls the simulated respiratory frequency. The operation control system controls the resistance value adjusting circuit to be connected into the resistance values of the first adjusting circuit and the second adjusting circuit, and then controls the flow rate of respiration.
Further, the air inlet fan and the air outlet fan are both direct current fans.
Further, the breathing module further comprises a fan housing and a partition plate. The fan housing has an accommodation space. The partition plate divides the accommodating space of the fan shell into two cavities. Air inlet and outlet structures are arranged at the two cavities. The air inlet fan and the air outlet fan are respectively arranged in the two cavities. The fan shell is fixed in the cranial cavity of the human model through screws.
Further, the resistance value adjusting branches are connected in parallel. Wherein the switch circuit and the resistor are connected in series to form a resistance adjusting branch.
Further, the resistor is a fixed resistor.
Further, the resistor is an adjustable resistor.
Furthermore, the resistance value adjusting branch circuit also comprises a compensation resistor which is used for compensating and adjusting the resistance value of each resistance value adjusting branch circuit.
Further, still include the circuit shell body. The adjustment system is disposed in an interior cavity of the circuit housing.
Further, a display system is also included. And the operation control system calculates the actual inspiration air quantity F1 and the actual expiration air quantity F2 according to the inspiration air speed V1 of the air inlet fan, the expiration air speed V2 of the air outlet fan and the cross-sectional area S1 of the opening of the nasal cavity and/or the oral cavity during respiration. The display system displays the actual inspiratory air volume F1, the actual expiratory air volume F2, the breath time T, the inspiratory air speed V1 and the expiratory air speed V2.
The technical effects of the invention are undoubted: based on the change characteristic curve of the human breathing process, the simulation of the human breathing is carried out by switching off and connecting resistors with different sizes of the controller, compared with the existing breathing simulation device, the simulation device is simple to install and low in manufacturing cost, and the wind speed and the breathing frequency can be changed through an operation control system. The air flow simulating the breathing of the human body can be provided, and meanwhile, the air flow simulating the breathing of the human body can be flexibly controlled, and the air flow simulating device is simple and convenient to install and low in manufacturing cost.
Drawings
FIG. 1 is a schematic view of a simplified breathing simulation apparatus in a fully assembled, fully cross-sectional configuration;
FIG. 2 is a circuit diagram of a simplified breath simulator;
FIG. 3 is a schematic view of a mannequin;
FIG. 4 is a schematic view of a human body model breathing;
fig. 5 is a schematic view of respiratory airflow rate and frequency.
In the figure: the device comprises a breathing module 1, an air inlet fan 101, an air outlet fan 102, a fan shell 103, a partition plate 104, a controller 2, a resistor 3, a circuit outer shell 4, a wind speed monitoring system 5, a display system 6, an operation control system 7, a power supply 8 and a switch circuit 9.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
referring to fig. 1 to 3, the present embodiment provides a simple respiration simulation device, which includes a respiration module 1 and a wind speed monitoring system 5 arranged in a cranial cavity of a human model, as well as a regulating system, a circuit outer shell 4, a display system 6 and an operation control system 7.
The cranial cavity of the human model is communicated with the outside through the nasal cavity and/or the oral cavity. The breathing module 1 comprises an inlet fan 101 and an outlet fan 102 connected in parallel, as well as a fan housing 103 and a partition 104. The fan housing 103 has an accommodation space. The partition plate 104 divides the accommodating space of the fan housing 103 into two chambers. Air inlet and outlet structures are arranged at the two cavities. The inlet fan 101 and the outlet fan 102 are respectively disposed in two cavities. The fan shell 103 is fixed in the skull cavity of the manikin through screws. The air inlet fan 101 and the air outlet fan 102 are both direct current fans. The air intake fan 101 sucks external air into the cranial cavity of the human model. The outlet fan 102 blows air from within the manikin's cranial cavity to the external environment. The wind speed monitoring system 5 is arranged beside the breathing module 1.
The adjustment system is arranged in the inner cavity of the circuit housing body 4. The regulation circuitry includes a first regulation circuit and a second regulation circuit. The first regulating circuit and the air inlet fan 101 are electrically connected between the positive pole and the negative pole of the power supply 8 loop. The first regulating circuit is connected in series with the supply fan 101 to set the input resistance of the supply fan 101. The second regulating circuit and the air outlet fan 102 are electrically connected between the positive pole and the negative pole of the power supply 8 loop. The second regulating circuit is connected in series with the outlet fan 102 to set the input resistance of the outlet fan 102. The first adjusting circuit and the second adjusting circuit both comprise a time schedule controller 2 and a plurality of resistance adjusting branches. The resistance value adjusting branches are connected in parallel. Wherein the switching circuit 9 and the resistor 3 are connected in series to form a resistance adjusting branch. The time schedule controller 2 and the controlled end of the resistance value adjusting branch are electrically connected with an operation control system 7.
During work, the wind speed monitoring system 5 monitors the wind speeds of exhalation and inhalation, and sends the breathing wind speed V and the breathing time T to the operation control system 7. The arithmetic control system 7 controls the timing controller 2 to be turned off, and then controls the simulated breathing frequency. The operation control system 7 controls the resistance value adjusting circuit to be connected into the resistance values of the first adjusting circuit and the second adjusting circuit, and then controls the flow rate of respiration. The operation control system 7 calculates the actual inspiration air quantity F1 and the actual expiration air quantity F2 according to the inspiration air speed V1 of the air inlet fan 101, the expiration air speed V2 of the air outlet fan 102 and the cross-sectional area S1 of the opening of the nasal cavity and/or the oral cavity during respiration. The display system 6 displays the actual inspiratory air volume F1, the actual expiratory air volume F2, the breath time T, the inspiratory air velocity V1, and the expiratory air velocity V2.
Referring to fig. 5, for simulating two processes of human body exhalation and inhalation, a time sequence is set for the turn-off of the controller by controlling the circuit, namely, by turning off and connecting resistors with different sizes of the controller, the simulated respiratory frequency, namely the respiratory time, is controlled by controlling the switching time, and the respiratory flow rate is controlled by controlling the size of the resistor, so that the two processes of human body exhalation and inhalation are accurately simulated, and the process change curve is in accordance with the condition of a real human body. Based on a circuit control principle, namely a characteristic curve of the change of the breathing process of a human body, the breathing module is installed in the head of the human body model, and the simulation of the breathing of the human body is carried out by switching off and connecting resistors with different sizes through the controller. The device not only can provide airflow simulating human body respiration, but also can realize flexible control, simple and convenient installation and low manufacturing cost, thereby achieving the purpose of simple respiration simulation device.
Example 2:
the embodiment provides a simple breathing simulation device, which comprises a breathing module 1 and a wind speed monitoring system 5 which are arranged in a cranial cavity of a human body model, and an adjusting system, a circuit outer shell 4, a display system 6 and an operation control system 7.
The cranial cavity of the human model is communicated with the outside through the nasal cavity and/or the oral cavity. The breathing module 1 comprises an inlet fan 101 and an outlet fan 102 connected in parallel, as well as a fan housing 103 and a partition 104. The fan housing 103 has an accommodation space. The partition plate 104 divides the accommodating space of the fan housing 103 into two chambers. Air inlet and outlet structures are arranged at the two cavities. The inlet fan 101 and the outlet fan 102 are respectively disposed in two cavities. The fan shell 103 is fixed in the skull cavity of the manikin through screws. The air inlet fan 101 and the air outlet fan 102 are both direct current fans. The air intake fan 101 sucks external air into the cranial cavity of the human model. The outlet fan 102 blows air from within the manikin's cranial cavity to the external environment. The wind speed monitoring system 5 is arranged beside the breathing module 1.
The adjustment system is arranged in the inner cavity of the circuit housing body 4. The regulation circuitry includes a first regulation circuit and a second regulation circuit. The first regulating circuit and the air inlet fan 101 are electrically connected between the positive pole and the negative pole of the power supply 8 loop. The first regulating circuit is connected in series with the supply fan 101 to set the input resistance of the supply fan 101. The second regulating circuit and the air outlet fan 102 are electrically connected between the positive pole and the negative pole of the power supply 8 loop. The second regulating circuit is connected in series with the outlet fan 102 to set the input resistance of the outlet fan 102. The first adjusting circuit and the second adjusting circuit both comprise a time schedule controller 2 and a plurality of resistance adjusting branches. The resistance value adjusting branches are connected in parallel. Wherein the switching circuit 9 and the resistor 3 are connected in series to form a resistance adjusting branch. The time schedule controller 2 and the controlled end of the resistance value adjusting branch are electrically connected with an operation control system 7.
During work, the wind speed monitoring system 5 monitors the wind speeds of exhalation and inhalation, and sends the breathing wind speed V and the breathing time T to the operation control system 7. The arithmetic control system 7 controls the timing controller 2 to be turned off, and then controls the simulated breathing frequency. The operation control system 7 controls the resistance value adjusting circuit to be connected into the resistance values of the first adjusting circuit and the second adjusting circuit, and then controls the flow rate of respiration. The operation control system 7 calculates the actual inspiration air quantity F1 and the actual expiration air quantity F2 according to the inspiration air speed V1 of the air inlet fan 101, the expiration air speed V2 of the air outlet fan 102 and the cross-sectional area S1 of the opening of the nasal cavity and/or the oral cavity during respiration. The display system 6 displays the actual inspiratory air volume F1, the actual expiratory air volume F2, the breath time T, the inspiratory air velocity V1, and the expiratory air velocity V2.
The operation control system is used for controlling the air suction speed V according to the opening time of the air inlet fan1And the air speed V of the air outlet fan when the air outlet fan is opened2And the cross-sectional area S of the nasal cavity opening of the manikin during breathing1Calculating the actual air suction volume F1And the actual expiratory air volume F2. The display system displays the actual respiratory air volume V (including the actual inspiratory air volume V)1And the actual expiratory air volume V2). The operation control system is used for controlling the air suction speed V according to the opening time of the air inlet fan1And the air speed V of the air outlet fan when the air outlet fan is opened2And the cross-sectional area S of the nasal cavity opening of the manikin during breathing1Calculating the actual air suction volume V1And the actual expiratory air volume V2Calculating to obtain the actual air suction volume F1And the actual expiratory air volume F2。
F1＝V1*S (1)
F2＝V2*S (2)
The operation control system controls the fan rotating speed Q based on the demand, controls the fan rotating speed Q through the resistor (3), and automatically adjusts through the on-off controller based on the respiration air volume curve of the simulated respiration.
In actual production, the operation method of the simple breathing simulation device mainly comprises the following steps:
1) an indoor simple breathing simulation device is installed inside the human body model according to the requirements of a user.
2) Setting air suction speed V according to user requirements1And expiratory wind speed V2And sets the breath time T.
3) Display system for displaying air intake F1Expiratory air volume F2And the breathing time T, and sending the data to the arithmetic control system.
4) By means of the suction air speed V at the time of opening of the air inlet fan1And the air speed V of the air outlet fan when the air outlet fan is opened2And the cross-sectional area S of the nasal cavity opening of the manikin during breathing1Calculating the actual air suction volume F1And the actual expiratory air volume F2。
The actual suction air volume F1And the actual expiratory air volume F2As follows:
F1＝V1*S (1)
F2＝V2*S (2)
5) the simple breathing simulation device arranged in the head of the human body model executes the set air suction speed V1Expiratory air speed V2Realizing human body respiration simulation with the respiration time T, and displaying the real-time inspiration air quantity F on a display system1Expiratory air volume F2And a breath time T.
The embodiment provides a simple breathing simulation device with flexible control, simple and convenient installation and low manufacturing cost, the current circuit controller is developed mature, resistors with different sizes are easy to obtain, and the feasibility of the scheme can be improved. Meanwhile, the sensor for the wind speed has the advantages of mature technology, high precision, low cost, wide application, easy data acquisition and the like, and can improve the effect of controlling ventilation. The breathing simulation device can be set according to the breathing simulation required by a user, has the personalized characteristic, and meets the requirement of simple operation to the greatest extent. The embodiment has particularly remarkable effect in the related research field of the human respiratory airflow.
The embodiment provides a simple breath simulation solution with flexible control, simple and convenient installation and low cost, aiming at the problems of high cost, difficult maintenance and immature domestic technology of the existing breath simulation device. The invention establishes a simple breathing simulation device according to the circuit control principle. The breathing wind speed and the breathing frequency can be adjusted according to the requirements of users, and the method has obvious advantages compared with the prior art.
Example 3:
the embodiment provides a basic simple breathing simulation device, which comprises a breathing module 1 and a wind speed monitoring system 5 which are arranged in the cranial cavity of a human model, and an adjusting system and an operation control system 7.
The cranial cavity of the human model is communicated with the outside through the nasal cavity and/or the oral cavity. The breathing module 1 comprises an inlet fan 101 and an outlet fan 102 connected in parallel. The air intake fan 101 sucks external air into the cranial cavity of the human model. The outlet fan 102 blows air from within the manikin's cranial cavity to the external environment. The wind speed monitoring system 5 is arranged beside the breathing module 1.
The regulation circuitry includes a first regulation circuit and a second regulation circuit. The first regulating circuit and the air inlet fan 101 are electrically connected between the positive pole and the negative pole of the power supply 8 loop. The first regulating circuit is connected in series with the supply fan 101 to set the input resistance of the supply fan 101. The second regulating circuit and the air outlet fan 102 are electrically connected between the positive pole and the negative pole of the power supply 8 loop. The second regulating circuit is connected in series with the outlet fan 102 to set the input resistance of the outlet fan 102. The first adjusting circuit and the second adjusting circuit both comprise a time schedule controller 2 and a plurality of resistance adjusting branches. The time schedule controller 2 and the controlled end of the resistance value adjusting branch are electrically connected with an operation control system 7.
During work, the wind speed monitoring system 5 monitors the wind speeds of exhalation and inhalation, and sends the breathing wind speed V and the breathing time T to the operation control system 7. The arithmetic control system 7 controls the timing controller 2 to be turned off, and then controls the simulated breathing frequency. The operation control system 7 controls the resistance value adjusting circuit to be connected into the resistance values of the first adjusting circuit and the second adjusting circuit, and then controls the flow rate of respiration.
But this embodiment direct mount is inside the human model on the market, and relevant research such as air current characteristic, respiratory particulate matter deposit simulation, virus cross infection when breathing can use as the theoretical knowledge teaching aid of the common disease of intensive respiratory simultaneously.
Example 4:
the main structure of this embodiment is the same as that of embodiment 3, wherein the air supply fan 101 and the air outlet fan 102 are both direct current fans.
Example 5:
the main structure of this embodiment is the same as that of embodiment 3, wherein the breathing module 1 further includes a fan housing 103 and a partition 104. The fan housing 103 has an accommodation space. The partition plate 104 divides the accommodating space of the fan housing 103 into two chambers. Air inlet and outlet structures are arranged at the two cavities. The inlet fan 101 and the outlet fan 102 are respectively disposed in two cavities. The fan shell 103 is fixed in the skull cavity of the manikin through screws.
Example 6:
the main structure of this embodiment is the same as that of embodiment 3, wherein the resistance value adjusting branches are connected in parallel. Wherein the switching circuit 9 and the resistor 3 are connected in series to form a resistance adjusting branch.
Example 7:
the main structure of this embodiment is the same as embodiment 3, wherein the resistor 3 is a fixed resistor.
Example 8:
the main structure of this embodiment is the same as embodiment 3, wherein the resistor 3 is an adjustable resistor.
Example 9:
the main structure of this embodiment is the same as that of embodiment 3, wherein the resistance adjusting branches further include a compensation resistor for compensating and adjusting the resistance of each resistance adjusting branch.
Example 10:
the main structure of this embodiment is the same as embodiment 3, wherein the circuit casing 4 is further included. The adjustment system is arranged in the inner cavity of the circuit housing body 4.
Example 11:
the main structure of this embodiment is the same as embodiment 3, wherein a display system 6 is further included. The operation control system 7 calculates the actual inspiration air quantity F1 and the actual expiration air quantity F2 according to the inspiration air speed V1 of the air inlet fan 101, the expiration air speed V2 of the air outlet fan 102 and the cross-sectional area S1 of the opening of the nasal cavity and/or the oral cavity during respiration. The display system 6 displays the actual inspiratory air volume F1, the actual expiratory air volume F2, the breath time T, the inspiratory air velocity V1, and the expiratory air velocity V2. The wind speed monitoring system and the display system monitor and display the exhaled air volume and the inhaled air volume, and a user feeds back the required respiratory air volume to the operation control system according to the requirement. Referring to fig. 4, 4a represents mouth breathing and 4b represents nose breathing. Simple and easy breathing analogue means can adjust respiratory frequency, amount of wind according to the user's demand, and the simulation is studied respiratory state under the different scenes, if original warm body dummy has the heating function, then can be better simulate out the expiratory airflow characteristic.
Example 12:
the main structure of this embodiment is the same as that of embodiment 3, wherein the respiratory airflow is used as the basis for virus cross-infection research, thereby preventing ethical problems of human experiments. Can adopt a plurality of simple and easy breathing analogue means's of installation manikins, through setting for respiratory air volume respiratory rate and confirm good locating place, add tracer gas in the laboratory environment, detect and research tracer gas concentration in the laboratory, gas flow field characteristic in the laboratory to research virus cross infection risk.
Example 13:
the main structure of the present embodiment is the same as that of embodiment 3, wherein the respiratory airflow is used for simulating and researching respiratory airflow characteristics in different environments, such as static indoor environment, air-conditioning indoor environment, heating indoor environment and the like, and simultaneously, the respiratory states of different age groups, different working strengths and the like can be simulated by adjusting respiratory frequency and air volume.
The simple breathing simulation device is simple and convenient to set, and the display system displays the set air volume and frequency through user setting, so that the breathing state is controlled. The simple breathing simulation device is simple and convenient to mount, can be directly mounted inside the head of the human body model by screws, and is convenient to dismount and overhaul.
Claims (9)
1. The utility model provides a simple and easy breathing analogue means which characterized in that: comprises a breathing module (1) and an air speed monitoring system (5) which are arranged in the cranial cavity of a human body model, and an adjusting system and an operation control system (7);
the cranial cavity of the human body model is communicated with the outside through a nasal cavity and/or an oral cavity; the breathing module (1) comprises an inlet fan (101) and an outlet fan (102) which are connected in parallel; the air inlet fan (101) sucks external air into the cranial cavity of the human model; the air outlet fan (102) blows air in the cranial cavity of the manikin to the external environment; the wind speed monitoring system (5) is arranged beside the breathing module (1);
the regulation circuitry comprises a first regulation circuit and a second regulation circuit; the first regulating circuit and the air inlet fan (101) are electrically connected between the positive pole and the negative pole of the power supply (8) loop; the first regulating circuit is connected with the air supply fan (101) in series to set an input resistor of the air supply fan (101); the second regulating circuit and the air outlet fan (102) are electrically connected between the positive pole and the negative pole of the power supply (8) loop; the second regulating circuit is connected with the air outlet fan (102) in series to set an input resistor of the air outlet fan (102); the first adjusting circuit and the second adjusting circuit both comprise a time schedule controller (2) and a plurality of resistance adjusting branches; the time sequence controller (2) and the controlled end of the resistance value adjusting branch circuit are electrically connected with the operation control system (7);
when the wind speed monitoring system works, the wind speed monitoring system (5) monitors the wind speeds of exhalation and inhalation, and sends the breathing wind speed V and the breathing time T to the operation control system (7); the operation control system (7) controls the turn-off of the time sequence controller (2) so as to control the simulated respiratory frequency; and the operation control system (7) controls the resistance value adjusting circuit to be connected into the resistance values of the first adjusting circuit and the second adjusting circuit, and then controls the respiratory flow rate.
2. The simplified breathing simulation apparatus of claim 1, wherein: the air inlet fan (101) and the air outlet fan (102) are both direct current fans.
3. The simplified breathing simulation apparatus of claim 1, wherein: the breathing module (1) further comprises a fan housing (103) and a partition (104); the fan housing (103) has an accommodation space; the partition plate (104) divides the accommodating space of the fan shell (103) into two cavities; air inlet and outlet structures are arranged at the two cavities; the air inlet fan (101) and the air outlet fan (102) are respectively arranged in the two cavities; the fan shell (103) is fixed in the cranial cavity of the manikin through screws.
4. The simplified breathing simulation apparatus of claim 1, wherein: the resistance value adjusting branches are connected in parallel; the switch circuit (9) and the resistor (3) are connected in series to form a resistance value adjusting branch.
5. The simplified breathing simulation apparatus of claim 4, wherein: the resistor (3) is a fixed resistor.
6. The simplified breathing simulation apparatus of claim 4, wherein: the resistor (3) is an adjustable resistor.
7. The simplified breathing simulation apparatus of claim 4, wherein: the resistance value adjusting branch circuit also comprises a compensation resistor which is used for compensating and adjusting the resistance value of each resistance value adjusting branch circuit.
8. The simplified breathing simulation apparatus of claim 1, wherein: further comprises a circuit outer casing (4); the adjusting system is arranged in an inner cavity of the circuit outer housing (4).
9. The simplified breathing simulation apparatus of claim 1, wherein: further comprising a display system (6); the operation control system (7) calculates the actual inspiration air quantity F1 and the actual expiration air quantity F2 according to the inspiration air speed V1 of the air inlet fan (101), the expiration air speed V2 of the air outlet fan (102) and the opening cross-sectional area S1 of the nasal cavity and/or the oral cavity during respiration; the display system (6) displays the actual inspiration air volume F1, the actual expiration air volume F2, the breathing time T, the inspiration air speed V1 and the expiration air speed V2.
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