Control circuit of breathing machine test equipment and breathing machine test equipment

Abstract

The utility model relates to the technical field of equipment testing, in particular to a control circuit of breathing machine testing equipment and the breathing machine testing equipment. The main control board controls the breathing machine test equipment to generate positive pressure or negative pressure by controlling the positive and negative pressure control circuit; by controlling the air pressure flow control circuit to control the flow and pressure of air generated by the respirator test equipment, the control circuit of the respirator test equipment can control the respirator test equipment to generate accurate negative pressure or positive pressure to a simulated lung through the positive and negative pressure control circuit and the air pressure flow control circuit; the simulated lung can simulate the lung pressure of a patient, control requirements of various pressures and flows during testing of the breathing machine to be tested are met, and whether various functional parameters, performance parameters and alarm indexes output by the breathing machine to be tested meet requirements or not is tested. Manual participation is not needed, the testing efficiency is greatly improved while the testing cost is reduced, and automatic testing of the breathing machine is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment testing, in particular to a control circuit of a ventilator testing device and the ventilator testing device. Background Art

[0002] A ventilator is a medical device that is used to provide artificial respiration support. When the human body is unable to breathe effectively on its own due to some reasons, such as severe asthma, respiratory failure, lung disease or surgery, a ventilator can help maintain normal respiratory function by delivering oxygen and / or removing carbon dioxide.

[0003] In the prior art, when testing the performance of a ventilator, a simulated lung with a certain elasticity is used. It is manually pinched and then released (or other similar actions are performed). Due to the elasticity of the simulated lung, it expands outward, thereby forming a negative pressure and suction flow in the breathing circuit. If the trigger parameters set by the ventilator are reached, the ventilator supplies air. This testing method is inefficient, prone to missed tests or misjudgments, and cannot accurately achieve the required negative pressure and suction flow. It can only qualitatively test the trigger function of the ventilator, but cannot quantitatively test the trigger function of the ventilator. Utility Model Content

[0004] The embodiment of the utility model provides a control circuit of a ventilator testing device and a ventilator testing device, so as to solve the problem that the ventilator testing method in the prior art is inefficient and cannot quantitatively test the triggering function of the ventilator.

[0005] In the first aspect, the utility model provides a control circuit of a ventilator testing device, comprising: a main control board, a positive and negative pressure control circuit and an air pressure flow control circuit, wherein the main control board is electrically connected to the positive and negative pressure control circuit and the air pressure flow control circuit, respectively; the main control board is used to control the components in the positive and negative pressure air circuits of the ventilator testing device by controlling the positive and negative pressure control circuits, and the main control board is also used to control the components in the pressure control air circuit of the ventilator testing device by controlling the air pressure flow control circuit.

[0006] In one embodiment, the control circuit of the ventilator test device further includes: a measurement circuit, the main control board is electrically connected to the measurement circuit, and the measurement circuit is used to control components in the measurement gas circuit of the ventilator test device.

[0007] In one embodiment, the measurement circuit includes: a first pressure sensor, a first flow sensor, an oxygen concentration sensor and a carbon dioxide concentration sensor, the first pressure sensor is connected to the first input terminal of the main control board, the first flow sensor is connected to the second input terminal of the main control board, the oxygen concentration sensor is connected to the third input terminal of the main control board, and the carbon dioxide concentration sensor is connected to the fourth input terminal of the main control board.

[0008] In one embodiment, the positive and negative pressure control circuit includes a positive pressure control circuit and a negative pressure control circuit, the positive pressure control circuit is electrically connected to the first control end of the main control board, and the negative pressure control circuit is electrically connected to the second control end of the main control board. The positive pressure control circuit is used to control the components in the positive pressure branch control air circuit in the ventilator testing equipment, and the negative pressure control circuit is used to control the components in the negative pressure branch control air circuit in the ventilator testing equipment.

[0009] In one embodiment, the positive pressure control circuit includes: an air source inlet solenoid valve, the control end of which is connected to the first control end of the main control board; the negative pressure control circuit includes: a negative pressure solenoid valve, the control end of which is connected to the second control end of the main control board.

[0010] In one embodiment, the air pressure flow control circuit includes: a turbine, a turbine solenoid valve and a measuring branch, the control end of the turbine is connected to the third control end of the main control board, the control end of the turbine solenoid valve is connected to the fourth control end of the main control board, and the measuring branch is electrically connected to the main control board.

[0011] In one embodiment, the measurement branch includes: a second pressure sensor and a second flow sensor, the second pressure sensor is connected to the fifth input terminal of the main control board, and the second flow sensor is connected to the sixth input terminal of the main control board.

[0012] In one embodiment, the first communication terminal of the main control board is communicatively connected to the ventilator to be tested, and the main control board is also used to control the ventilator to be tested; the second communication terminal of the main control board is communicatively connected to the host computer.

[0013] In one embodiment, the control circuit of the ventilator testing device further includes: a rectifier circuit, wherein the input end of the rectifier circuit is used to input an AC power signal, and the output end of the rectifier circuit is electrically connected to the power end of the main control board.

[0014] In a second aspect, the present embodiment provides a ventilator testing device, the ventilator testing device comprising a control circuit of the ventilator testing device as described in the first aspect and its improvement, the control circuit of the ventilator testing device being used to control an air source component in the ventilator testing device.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0016] The control circuit of the ventilator test device of the utility model includes: a main control board, a positive and negative pressure control circuit and an air pressure flow control circuit. The main control board controls the ventilator test device to generate positive or negative pressure by controlling the positive and negative pressure control circuit; controls the flow and pressure of the gas generated by the ventilator test device by controlling the air pressure flow control circuit. The control circuit of the ventilator test device of the utility model can control the ventilator test device to generate accurate negative or positive pressure to the simulated lung through the positive and negative pressure control circuit and the air pressure flow control circuit. The simulated lung can simulate the lung pressure of the patient, realize the control requirements of various pressures and flows when testing the ventilator to be tested, and test whether the various functional parameters, performance parameters and alarm indicators output by the ventilator to be tested meet the requirements. And no manual participation is required, while reducing the test cost, the test efficiency is greatly improved, and the automatic test of the ventilator is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the module structure of the control circuit of the ventilator test device provided by one embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the module structure of the air source component of the ventilator testing device provided by one embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the module structure of the control circuit of the ventilator test device provided by one embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the module structure of the air source component of the ventilator testing device provided by one embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the module structure of the control circuit of the ventilator test device provided by one embodiment of the utility model;

[0023] Among them, 1. main control board, 2. positive and negative pressure control circuit, 3. air pressure flow control circuit, 4. positive and negative pressure air circuit, 5. pressure control air circuit, 6. measuring air circuit, 7. measuring circuit, 8. second pressure sensor, 9. second flow sensor, 10. ventilator to be tested, 11. host computer, 12. rectifier circuit, 21. positive pressure control circuit, 22. negative pressure control circuit, 31. turbine, 32. turbine solenoid valve, 33. measuring branch, 41. positive pressure branch control air circuit, 42. negative pressure branch control air circuit, 52. control branch air circuit, 53. measuring branch air circuit, 71. first pressure sensor, 72. first flow sensor, 73. oxygen concentration sensor, 74. carbon dioxide concentration sensor. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In order to thoroughly understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0028] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosure belongs. It will be further understood that the terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0029] In one embodiment, if Figure 1 As shown, a module structure schematic diagram of an air pressure flow control circuit 3 of a ventilator test device is provided, comprising: a main control board 1, a positive and negative pressure control circuit 2 and an air pressure flow control circuit 3, the main control board 1 being electrically connected to the positive and negative pressure control circuit 2 and the air pressure flow control circuit 3 respectively; the main control board 1 is used to control components in the positive and negative pressure air circuits of the ventilator test device by controlling the positive and negative pressure control circuit 2, and the main control board 1 is also used to control components in the pressure control air circuit of the ventilator test device by controlling the air pressure flow control circuit 3.

[0030] It is understandable that the main control board 1 is a processor or a processor is provided in the main control board 1. It is understandable that the main control board 1 can be any kind of processor, the main control board 1 can be an MCU, the main control board 1 can also be a CPU, the main control board 1 can also be a DSP, preferably, the main control board 1 is an MCU.

[0031] like Figure 2 As shown, a schematic diagram of the module structure of an air source component of a ventilator testing device is provided; the air source component includes: a positive and negative pressure air circuit 4 and a pressure control air circuit 5, the first input end of the positive and negative pressure air circuit 4 is used to input the air source, the second input end of the positive and negative pressure air circuit 4 is used to connect to the ventilator to be tested, the output end of the positive and negative pressure air circuit 4 is connected to the input end of the pressure control air circuit 5, the output end of the pressure control air circuit 5 is used to connect to the ventilator to be tested, and the output end of the pressure control air circuit 5 is used to connect to the simulated lung.

[0032] Specifically, the main control board 1 controls the positive and negative pressure gas circuits 4 in the gas source component to output positive pressure or generate negative pressure by controlling the positive and negative pressure control circuits 2, and the main control board 1 controls the pressure and flow of the gas in the pressure control gas circuit 5 in the gas source component by controlling the gas pressure flow control circuit 3.

[0033] A gas measuring instrument may be provided between the ventilator to be tested and the simulated lung to measure various functional parameters and performance parameters of the ventilator to be tested. Corresponding sensors may also be provided on the airway between the ventilator to be tested and the simulated lung to measure the functional parameters and performance parameters of the ventilator to be tested. Preferably, the gas measuring instrument is communicatively connected to the main control board 1, or each sensor is electrically connected to the main control board 1, so that the main control board 1 can obtain the functional parameters and performance parameters of the ventilator to be tested.

[0034] The working process of the control circuit of the above-mentioned ventilator testing equipment is: setting the ventilation mode and parameters of the ventilator to be tested, the main control board 1 controls the direction, pressure and flow of the gas input to the simulated lung through the ventilator test air circuit according to the parameters that need to be measured by the current ventilator to be tested. Specifically, when the parameters tested by the ventilator to be tested require positive pressure to flow into the simulated lung, the main control board 1 controls the positive and negative pressure air circuits 4 to output positive pressure by controlling the positive and negative pressure control circuit 2, and the gas source flows to the pressure control air circuit 5 through the positive and negative pressure air circuits 4 in the air source assembly. The main control board 1 controls the pressure and flow of the gas in the pressure control air circuit 5 by controlling the air pressure flow control circuit 3, and uses a sensor or a gas measuring instrument to measure the actual value of the parameter of the ventilator to be tested. The main control board 1 compares the actual value of the parameter of the ventilator to be tested with the parameter value set inside the ventilator to be tested to determine whether the result is qualified.

[0035] When the ventilator to be tested needs negative pressure to be triggered, the main control board 1 controls the positive and negative pressure gas circuits 4 to generate negative pressure by controlling the positive and negative pressure control circuits 2, and the gas enters the positive and negative pressure gas circuits 4 from the ventilator to be tested. The main control board 1 controls the pressure and flow of the gas in the pressure control gas circuit 5 by controlling the air pressure flow control circuit 3, and uses sensors or gas measuring instruments to measure the actual values ​​of the parameters of the ventilator to be tested. The main control board 1 compares the actual values ​​of the parameters of the ventilator to be tested with the parameter values ​​set inside the ventilator to be tested to determine whether the results are qualified.

[0036] The corresponding program can be set in the main control board 1 for judgment according to the actual application situation. Specifically, the actual value of the ventilator parameter to be tested can be set to be consistent with the parameter value set inside the ventilator to be tested to be qualified, or the actual value of the ventilator parameter to be tested can be set to be within the preset range of the parameter value set inside the ventilator to be tested to be qualified.

[0037] If the results of each parameter in each ventilation mode of the ventilator to be tested are qualified, the ventilator is judged to be qualified; if some parameters in the ventilator to be tested are unqualified, the ventilator to be tested is unqualified; or if the unqualified parameters in the ventilator to be tested exceed the preset number, the ventilator to be tested is unqualified.

[0038] Furthermore, if the ventilator to be tested is provided with a trigger alarm function, and an alarm will be issued when a certain parameter or multiple parameters in the ventilator to be tested exceed a preset range, the main control board 1 of the present embodiment controls the ventilator test gas circuit to set multiple groups of test parameters for a certain parameter that will alarm outside the preset range. The test parameters of some groups of the multiple groups of test parameters are set within the preset range, and the test parameters of other groups are set outside the preset range. The test is conducted to determine whether an alarm will be issued when such parameter of the ventilator to be tested exceeds the preset range.

[0039] The control circuit of the ventilator test device of this embodiment is provided with a main control board 1, an air pressure flow control circuit 3 and a positive and negative pressure control circuit 2. The main control board 1 controls the ventilator test device to generate positive pressure or negative pressure by controlling the positive and negative pressure control circuit 2; the air pressure flow control circuit 3 controls the flow and pressure of the gas generated by the ventilator test device. The air pressure flow control circuit 3 of the ventilator test device of the utility model can control the ventilator test device to generate accurate negative pressure or positive pressure to the simulated lung through the positive and negative pressure control circuit 2 and the air pressure flow control circuit 3. The simulated lung can simulate the lung pressure of the patient, realize the control requirements of various pressures and flows when testing the ventilator to be tested, and test whether the various functional parameters, performance parameters and alarm indicators output by the ventilator to be tested meet the requirements. And no manual participation is required, while reducing the test cost, the test efficiency is greatly improved, and the automatic test of the ventilator is realized.

[0040] like Figure 3 As shown, a module structure diagram of an air pressure flow control circuit 3 of a ventilator test device is provided; Figure 4 As shown, a schematic diagram of the module structure of the air source component of a ventilator testing device is provided.

[0041] In one embodiment, if Figure 3 As shown in the above Figure 1 Based on the control circuit of the ventilator test device shown, the control circuit of the ventilator test device also includes: a measurement circuit 7, the main control board 1 is electrically connected to the measurement circuit 7, and the measurement circuit 7 is used to control the components in the measurement gas path of the ventilator test device.

[0042] Specifically, the main control board 1 obtains various functional parameters and performance parameters of the ventilator 10 to be tested measured by the measuring gas circuit 6 through the measuring circuit 7. It can be understood that a pressure sensor can be set in the measuring gas circuit 6 to obtain the pressure of the gas output by the ventilator 10 to be tested, and a flow sensor can be set in the measuring gas circuit 6 to obtain the flow rate of the gas output by the ventilator 10 to be tested. Furthermore, an oxygen concentration sensor can be set in the measuring gas circuit 6 to obtain the oxygen concentration of the gas output by the sensor to be tested, a pressure gauge can be set in the measuring gas circuit 6 to obtain the pressure of the gas output by the ventilator 10 to be tested, and a turbine flowmeter can be set in the measuring gas circuit 6 to obtain the flow rate of the gas output by the ventilator 10 to be tested.

[0043] The working process of the control circuit of the above-mentioned ventilator testing equipment is: when the ventilator testing equipment is used to test the ventilator 10 to be tested, the actual value of the parameter of the ventilator 10 to be tested is measured through the measuring gas circuit 6, and the control host obtains the various functional parameters and performance parameters of the ventilator 10 to be tested measured by the measuring gas circuit 6 through the measuring circuit 7.

[0044] The control circuit of the ventilator test equipment of this embodiment is provided with a measuring circuit 7 to obtain various parameters of the gas output by the ventilator 10 to be tested, so that the main control board 1 compares the obtained parameters with the parameter values ​​set inside the ventilator 10 to be tested, thereby further realizing the automated testing of the ventilator.

[0045] In one embodiment, if Figure 3 As shown, on the basis of the above embodiment, the measuring circuit 7 includes: a first pressure sensor 71, a first flow sensor 72, an oxygen concentration sensor 73 and a carbon dioxide concentration sensor 74, the first pressure sensor 71 is connected to the first input end of the main control board 1, the first flow sensor 72 is connected to the second input end of the main control board 1, the oxygen concentration sensor 73 is connected to the third input end of the main control board 1, and the carbon dioxide concentration sensor 74 is connected to the fourth input end of the main control board 1.

[0046] Specifically, the first pressure sensor 71 is used to obtain the pressure of the gas output by the ventilator 10 to be tested; the first flow sensor 72 is used to obtain the flow of the gas output by the ventilator 10 to be tested; the oxygen concentration sensor 73 is used to obtain the oxygen concentration of the gas output by the sensor to be tested; and the carbon dioxide concentration sensor 74 is used to obtain the carbon dioxide concentration of the gas output by the ventilator 10 to be tested.

[0047] Preferably, the sensors in the measuring circuit 7 may be calibrated regularly to improve the accuracy of the sensors.

[0048] The working process of the control circuit of the above-mentioned ventilator testing equipment is as follows: when the ventilator testing equipment is used to test the ventilator 10 to be tested, the control host obtains the parameters of the ventilator 10 to be tested through the first pressure sensor 71, the first flow sensor 72, the oxygen concentration sensor 73 and the carbon dioxide concentration sensor 74 in the measuring circuit 7.

[0049] The control circuit of the ventilator test equipment of this embodiment is provided with a sensor to measure the gas output by the ventilator 10 to be tested. The sensor transmits the measured data to the main control board 1 for the convenience of automated control. Regular calibration of the sensor can make the sensor have higher measurement accuracy and improve the accuracy of system measurement.

[0050] In one embodiment, if Figure 3 As shown in the above Figure 1On the basis of the control circuit of the ventilator testing equipment shown, the positive and negative pressure control circuit 2 includes a positive pressure control circuit 21 and a negative pressure control circuit 22. The positive pressure control circuit 21 is electrically connected to the first control end of the main control board 1, and the negative pressure control circuit 22 is electrically connected to the second control end of the main control board 1. The positive pressure control circuit 21 is used to control the components in the positive pressure branch control air circuit 41 in the ventilator testing equipment, and the negative pressure control circuit 22 is used to control the components in the negative pressure branch control air circuit 42 in the ventilator testing equipment.

[0051] Specifically, the positive pressure control circuit 21 is used to control the flow and shutoff of the positive pressure gas in the positive and negative pressure gas circuits 4, and the negative pressure control circuit 22 is used to control the flow and shutoff of the negative pressure gas in the positive and negative pressure gas circuits 4. Solenoid valves can be set in the positive pressure control circuit 21 and the negative pressure control circuit 22 for control.

[0052] The working process of the control circuit of the above-mentioned ventilator testing equipment is: when the ventilator 10 to be tested requires positive pressure, the positive pressure control circuit 21 controls the positive pressure branch control gas circuit 41 in the positive and negative pressure gas circuit 4 to be turned on, and the negative pressure control circuit 22 controls the negative pressure branch control gas circuit 42 in the positive and negative pressure gas circuit 4 to be turned off; when the ventilator 10 to be tested requires negative pressure, the negative pressure control circuit 22 controls the negative pressure branch control gas circuit 42 in the positive and negative pressure gas circuit 4 to be turned on, and the positive pressure control circuit 21 controls the positive pressure branch control gas circuit 41 in the positive and negative pressure gas circuit 4 to be turned off.

[0053] The ventilator test equipment control circuit 3 of the present embodiment is provided with a positive pressure and negative pressure control circuit 21 and a negative pressure control circuit 22 to control the positive pressure branch control gas circuit 41 and the negative pressure branch control gas circuit 42 in the positive and negative pressure gas circuit 4, thereby realizing automated operation and improving the flexibility and safety of the test equipment.

[0054] In one embodiment, if Figure 3 As shown, based on the above embodiment, the positive pressure positive and negative pressure control circuit 21 includes: an air source inlet solenoid valve, the control end of the air source inlet solenoid valve is connected to the first control end of the main control board 1, and the negative pressure positive and negative pressure control circuit 22 includes: a negative pressure solenoid valve, the control end of the negative pressure solenoid valve is connected to the second control end of the main control board 1.

[0055] The working process of the control circuit of the above-mentioned ventilator testing equipment is as follows: when the ventilator 10 to be tested requires positive pressure, the positive pressure control circuit 21 controls the positive pressure branch control gas circuit 41 in the positive and negative pressure gas circuit 4 through the gas source inlet solenoid valve to be turned on, and the negative pressure control circuit 22 controls the negative pressure branch control gas circuit 42 in the positive and negative pressure gas circuit 4 to be turned off through the negative pressure solenoid valve; when the ventilator 10 to be tested requires negative pressure, the negative pressure control circuit 22 controls the negative pressure branch control gas circuit 42 in the positive and negative pressure gas circuit 4 to be turned on through the negative pressure solenoid valve, and the positive pressure control circuit 21 controls the positive pressure branch control gas circuit 41 in the positive and negative pressure gas circuit 4 to be turned off through the gas source inlet solenoid valve.

[0056] The control circuit of the ventilator testing equipment of this embodiment is provided with an air source inlet solenoid valve to control the flow and closing of the positive pressure branch control air circuit 41, and a negative pressure solenoid valve to control the flow and closing of the negative pressure branch control air circuit 42. The solenoid valve can respond quickly to improve the efficiency of the test.

[0057] In one embodiment, if Figure 3 As shown in the above Figure 1 Based on the control circuit of the ventilator testing equipment shown, the air pressure flow control circuit 3 includes: a turbine 31, a turbine solenoid valve 32 and a measuring branch 33, the control end of the turbine 31 is connected to the third control end of the main control board 1, the control end of the turbine solenoid valve 32 is connected to the fourth control end of the main control board 1, and the measuring branch 33 is electrically connected to the main control board 1.

[0058] Specifically, the main control board 1 increases the flow rate of the gas through the turbine 31, and the main control board 1 adjusts the flow and pressure of the gas input to the simulated lung by controlling the turbine solenoid valve 32. The main control board 1 obtains the parameters of the gas in the pressure control gas circuit 5 through the measuring branch 33, and controls the turbine solenoid valve 32 according to the parameters to calibrate the pressure and flow of the gas.

[0059] The working process of the control circuit of the above-mentioned ventilator testing equipment is: when the ventilator 10 to be tested requires positive pressure, the positive and negative pressure control circuit 2 controls the positive pressure branch control gas circuit 41 to be connected, the negative pressure branch control gas circuit 42 is shut off, the positive pressure gas circuit is connected, the air pressure flow control circuit 3 controls the turbine 31 to be turned on, the turbine 31 controls the gas source to flow to the simulated lung, the main control board 1 controls the pressure and flow in the positive pressure gas circuit by controlling the turbine solenoid valve 32, and the measuring branch gas circuit 53 detects the parameters of the gas in the positive pressure gas circuit. The main control board 1 controls the turbine solenoid valve 32 to calibrate the pressure and flow of the gas according to the detection results.

[0060] When the ventilator 10 to be tested requires negative pressure, the positive and negative pressure control circuit 2 controls the negative pressure branch control gas circuit 42 to be connected, the positive pressure branch control gas circuit 41 is shut off, and the negative pressure gas circuit is connected. The positive and negative pressure control circuit 2 controls the turbine 31 to be turned on, and the turbine 31 controls the gas in the ventilator 10 to flow to the simulated lung. The main control board 1 controls the pressure and flow in the negative pressure gas circuit by controlling the turbine solenoid valve 32, and the measuring branch gas circuit 53 detects the parameters of the gas in the negative pressure gas circuit. The main control board 1 controls the turbine solenoid valve 32 to calibrate the pressure and flow of the gas according to the detection results.

[0061] The control circuit of the ventilator testing equipment of this embodiment is provided with a turbine 31 to increase the flow rate of the gas, a turbine solenoid valve 32 is provided to adjust the pressure and flow of the gas, and a measuring branch 33 is provided to detect the parameters of the gas in the pressure control gas circuit 5, so that the main control board 1 calibrates the pressure and flow of the gas according to the detection results, thereby further ensuring the accuracy of the test.

[0062] In one embodiment, if Figure 3 As shown, based on the above embodiment, the measuring branch 33 includes: a second pressure sensor 8 and a second flow sensor 9, the second pressure sensor 8 is connected to the fifth input terminal of the main control board 1, and the second flow sensor 9 is connected to the sixth input terminal of the main control board 1.

[0063] Specifically, the second pressure sensor 8 is used to obtain the pressure of the gas in the positive pressure gas circuit or the negative pressure gas circuit, and the second flow sensor 9 is used to obtain the flow of the gas in the positive pressure gas circuit or the negative pressure gas circuit.

[0064] The working process of the control circuit of the above-mentioned ventilator testing device is as follows: when the ventilator testing device is used to test the ventilator 10 to be tested, the actual value of the gas parameter of the gas circuit is obtained through the second pressure sensor 8 and the second flow sensor 9.

[0065] The control circuit of the ventilator test equipment of this embodiment is provided with a second pressure sensor 8 and a second flow sensor 9 to measure the gas in the positive pressure gas circuit or the negative pressure gas circuit. The sensor can output a digital signal and transmit the measurement result to the main control board 1 for easy automatic control. Regular calibration of the sensor can make the sensor have higher measurement accuracy and improve the accuracy of system measurement.

[0066] In one embodiment, if Figure 3 As shown in the above Figure 1 Based on the control circuit of the ventilator test equipment shown, the first communication terminal of the main control board 1 is connected to the ventilator 10 to be tested, and the main control board 1 is also used to control the ventilator 10 to be tested; the second communication terminal of the main control board 1 is connected to the host computer 11.

[0067] It is understandable that the main control board 1 and the ventilator 10 to be tested can be connected by wireless communication or by wired communication. The main control board 1 can set and control the ventilator 10 to be tested. The host computer 11 and the main control board 1 can be connected by wireless communication or by wired communication. Relevant programs can be set in the main control board 1 so that the main control board 1 can change the ventilation mode and parameters of the ventilator 10 to be tested, which is convenient for automated testing. Relevant programs can also be set in the host computer 11 to control the main control board 1 through the host computer 11, so that the main control board 1 controls the ventilation mode and parameters of the ventilator 10 to be tested.

[0068] Preferably, the host computer 11 controls the test equipment of the ventilator by controlling the main control board 1 to operate. The main control board 1 transmits the test result to the host computer 11 after the test is completed. The host computer 11 can print the test result through a printing device to facilitate the recording of the test result.

[0069] The working process of the control circuit of the above-mentioned ventilator test equipment is as follows: the host computer 11 controls the ventilator test equipment to work by controlling the main control board 1, and controls the ventilator 10 to be tested through the main control board 1.

[0070] The control circuit of the ventilator test equipment of this embodiment uses the host computer 11 to control the ventilator test equipment, which is convenient for recording the test results, and uses the main control board 1 to control the ventilator 10 to be tested, without the need for human intervention. While reducing the test cost, it greatly improves the test efficiency and realizes the automated testing of the ventilator.

[0071] In one embodiment, if Figure 3 As shown in the above Figure 1 Based on the control circuit of the ventilator test device shown, the control circuit of the ventilator test device also includes: a rectifier circuit 12, the input end of the rectifier circuit 12 is used to input an AC power signal, and the output end of the rectifier circuit 12 is electrically connected to the power end of the main control board 1.

[0072] It is understandable that the rectifier circuit 12 in this embodiment can be any type of rectifier circuit. The rectifier circuit 12 can be a half-wave rectifier circuit or a full-wave rectifier circuit.

[0073] The working process of the control circuit of the above-mentioned ventilator test equipment is as follows: the AC power signal is rectified by the rectifier circuit 12 and then flows to the main control board 1 to supply power to the main control board 1 .

[0074] The control circuit of the ventilator test device of this embodiment is provided with a rectifier circuit 12 at the power supply end of the main control board 1 for rectification, so as to provide the main control board 1 with a stable working voltage and current, thereby ensuring the stability of the circuit.

[0075] In one embodiment, a ventilator test device is provided, the ventilator test device includes the control circuit of the ventilator test device mentioned in any of the above embodiments, and the control circuit of the ventilator test device is used to control the air source component in the ventilator test device.

[0076] like Figure 5 As shown, a schematic diagram of the module structure of a ventilator testing device is provided; specifically, the ventilation mode and parameters of the ventilator to be tested 10 are set through the main control board 1, and the direction, pressure and flow of the gas input to the simulated lung of the ventilator test air circuit are controlled according to the parameters that need to be measured by the ventilator to be tested 10.

[0077] Specifically, when the parameters tested by the ventilator 10 to be tested require positive pressure to flow into the simulated lung, the main control board 1 controls the air source inlet solenoid valve in the positive pressure control circuit 21 to open, the negative pressure solenoid valve in the negative pressure control circuit 22 to close, and controls the turbine 31 to open, and the air source flows to the turbine 31 through the air source inlet solenoid valve. The main control board 1 adjusts the pressure and flow of the air source by controlling the turbine solenoid valve 32 and / or the air source inlet solenoid valve. The second pressure sensor 8 and the second flow sensor 9 detect the pressure and flow in the air circuit, and transmit the detection results to the main control board 1. The main control board 1 again detects the pressure and flow in the air circuit according to the detection results. Control the turbine solenoid valve 32 and / or the gas source inlet solenoid valve to calibrate the pressure and flow of the gas. The calibrated gas flows to the simulated lung to trigger the ventilator 10 to work. The first pressure sensor 71, the first flow sensor 72, the oxygen concentration sensor 73 and the carbon dioxide concentration sensor 74 on the measuring circuit 7 measure the actual values ​​of the parameters of the ventilator 10 to be tested, and transmit the measurement results to the main control board 1. The main control board 1 compares the actual values ​​of the parameters of the ventilator 10 to be tested with the parameter values ​​set inside the ventilator 10 to be tested, and determines the measurement results of the ventilator 10 to be tested.

[0078] When the ventilator 10 to be tested requires negative pressure for triggering, the main control board 1 controls the negative pressure solenoid valve in the negative pressure control circuit 22 to open, the gas source inlet solenoid valve in the positive pressure control circuit 21 to close, and controls the turbine 31 to start, triggering the ventilator 10 to work, and the gas enters the turbine 31 from the ventilator 10 to be tested. The main control board 1 adjusts the pressure and flow of the gas source by controlling the turbine solenoid valve 32 and / or the negative pressure solenoid valve. The second pressure sensor 8 and the second flow sensor 9 detect the pressure and flow in the gas circuit and transmit the detection results to the main control board 1. The main control board 1 controls the turbine solenoid valve 32 and / or the negative pressure solenoid valve again according to the detection results to calibrate the pressure and flow of the gas. The calibrated gas flows to the simulated lung. The first pressure sensor 71, the first flow sensor 72, the oxygen concentration sensor 73 and the carbon dioxide concentration sensor 74 on the measuring circuit 7 measure the actual values ​​of the parameters of the ventilator 10 to be tested, and transmit the measurement results to the main control board 1. The main control board 1 compares the actual values ​​of the parameters of the ventilator 10 to be tested with the parameter values ​​set inside the ventilator 10 to be tested, and determines the measurement results of the ventilator 10 to be tested.

[0079] The above embodiment is only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the aforementioned embodiment, a person skilled in the art should understand that the technical solution described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solution from the spirit and scope of the technical solution of each embodiment of the utility model, and should be included in the protection scope of the utility model.

Claims

1. A control circuit for a ventilator test device, characterized in that: include: A main control board, a positive and negative pressure control circuit and an air pressure flow control circuit, wherein the main control board is electrically connected to the positive and negative pressure control circuit and the air pressure flow control circuit respectively; The main control board is used to control the components in the positive and negative pressure air circuits of the ventilator testing device by controlling the positive and negative pressure control circuits. The main control board is also used to control the components in the pressure control air circuit of the ventilator testing device by controlling the air pressure flow control circuit.

2. The control circuit of the ventilator testing device according to claim 1, characterized in that: The control circuit of the ventilator test device further includes: a measurement circuit, the main control board is electrically connected to the measurement circuit, and the measurement circuit is used to control components in the measurement gas circuit of the ventilator test device.

3. The control circuit of the ventilator testing device as claimed in claim 2, characterized in that: The measurement circuit includes: a first pressure sensor, a first flow sensor, an oxygen concentration sensor and a carbon dioxide concentration sensor, the first pressure sensor is connected to the first input terminal of the main control board, the first flow sensor is connected to the second input terminal of the main control board, the oxygen concentration sensor is connected to the third input terminal of the main control board, and the carbon dioxide concentration sensor is connected to the fourth input terminal of the main control board.

4. The control circuit of the ventilator testing device according to claim 1, characterized in that: The positive and negative pressure control circuits include a positive pressure control circuit and a negative pressure control circuit. The positive pressure control circuit is electrically connected to the first control end of the main control board, and the negative pressure control circuit is electrically connected to the second control end of the main control board. The positive pressure control circuit is used to control components in the positive pressure branch control air circuit in the ventilator testing equipment, and the negative pressure control circuit is used to control components in the negative pressure branch control air circuit in the ventilator testing equipment.

5. The control circuit of the ventilator testing device as claimed in claim 4, characterized in that: The positive pressure control circuit includes: an air source inlet solenoid valve, the control end of which is connected to the first control end of the main control board; the negative pressure control circuit includes: a negative pressure solenoid valve, the control end of which is connected to the second control end of the main control board.

6. The control circuit of the ventilator testing device according to claim 1, characterized in that: The air pressure flow control circuit includes: a turbine, a turbine solenoid valve and a measuring branch. The control end of the turbine is connected to the third control end of the main control board, the control end of the turbine solenoid valve is connected to the fourth control end of the main control board, and the measuring branch is electrically connected to the main control board.

7. The control circuit of the ventilator testing device according to claim 6, characterized in that: The measuring branch includes: a second pressure sensor and a second flow sensor, the second pressure sensor is connected to the fifth input terminal of the main control board, and the second flow sensor is connected to the sixth input terminal of the main control board.

8. The control circuit of the ventilator testing device according to claim 1, characterized in that: The first communication terminal of the main control board is connected to the ventilator to be tested for communication, and the main control board is also used to control the ventilator to be tested; the second communication terminal of the main control board is connected to the host computer for communication.

9. The control circuit of the ventilator testing device according to claim 1, characterized in that: The control circuit of the ventilator testing device further includes: a rectifier circuit, wherein the input end of the rectifier circuit is used to input an AC power supply signal, and the output end of the rectifier circuit is electrically connected to the power supply end of the main control board.

10. A ventilator testing device, characterized in that: The ventilator test device comprises a control circuit of the ventilator test device as described in any one of claims 1 to 9, and the control circuit of the ventilator test device is used to control the gas source component in the ventilator test device.

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