Test system and test method for ventilator

Abstract

The present invention provides a test system and test method for a ventilator, the test system comprising: a test device, a negative flow generating device and a simulated lung; a valve assembly is arranged in the test device, and the valve assembly is respectively connected to the negative flow generating device, the simulated lung and the ventilator to be tested through pipelines; the negative flow generating device is used to generate a suction flow; a flow sensor and a pressure sensor are also arranged in the test device, the flow sensor is used to measure the real-time suction flow of the negative flow generating device, and the pressure sensor is used to measure the outlet pressure of the ventilator to be tested; when the valve assembly is in a first position state, the simulated lung, the test device and the ventilator to be tested are connected; when the valve assembly is in a second position state, the negative flow generating device, the test device and the ventilator to be tested are connected. The scheme of the present invention can not only quantitatively test the triggering function of the ventilator, but also reduce the cost of the test equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment testing, and in particular to a testing system and a testing method for a ventilator. Background Art

[0002] There are generally two setting options for the trigger function of spontaneous breathing of the ventilator: flow trigger and pressure trigger. Among them, flow trigger refers to the maximum flow rate that can be generated in the pipeline by the patient's spontaneous inhalation, and the range of this flow rate is generally between 0 and 20L / min; pressure trigger refers to the maximum negative pressure that can be generated in the pipeline when the patient spontaneously inhales, and the range of this value is generally between 0 and -2kPa.

[0003] At present, there are three main methods for testing the ventilator trigger function:

[0004] The first type is to use a simulated lung with a certain elasticity. After being pinched and released manually (or other similar actions), the simulated lung expands outward due to its elasticity, thus forming negative pressure and suction flow in the breathing circuit. If the trigger parameters set by the ventilator are reached, the ventilator will supply air. The disadvantage of this test method is that it cannot accurately achieve the required negative pressure and suction flow, and can only qualitatively test the trigger function of the ventilator, but cannot quantitatively test the trigger function of the ventilator.

[0005] The second type is when the flow sensor or pressure sensor is external, such as an anesthesia machine. During the test, the flow sensor or pressure sensor can be intermittently placed in a suction flow or negative pressure environment to observe the respiratory response of the ventilator. The disadvantage of this test method is that it is only applicable to the case where the flow sensor or pressure sensor is external, and the sensors of general ventilators are built-in, so this method is not applicable to ventilators.

[0006] The third method is to use an active simulated lung (such as the active simulated lung model ALS5000), which has a piston-cylinder-like cavity inside. The piston moves backward or in other ways to create a suction effect in the inner cavity. Similar to the actual patient's inhalation action, the software then identifies the flow and pressure values ​​monitored during the inhalation action, and measures the trigger flow and trigger pressure values. The disadvantage of this test method is that the equipment is too expensive and not suitable for general use. Summary of the invention

[0007] The embodiment of the present invention provides a test system and a test method for a ventilator, which can quantitatively test the triggering function of the ventilator and reduce the cost of the test equipment.

[0008] In a first aspect, an embodiment of the present invention provides a test system for a ventilator, comprising: a test device, a negative flow generating device, and a simulated lung;

[0009] The test device is provided with a valve assembly, and the valve assembly is respectively connected to the negative flow generating device, the simulated lung and the ventilator to be tested through pipelines;

[0010] The negative flow generating device is used to generate a suction flow;

[0011] The test device is also provided with a flow sensor and a pressure sensor, wherein the flow sensor is used to measure the real-time suction flow of the negative flow generating device, and the pressure sensor is used to measure the outlet pressure of the ventilator to be tested;

[0012] When the valve assembly is in the first position, the simulated lung, the test device and the ventilator to be tested are connected;

[0013] When the valve assembly is in the second position, the negative flow generating device, the testing device and the ventilator to be tested are connected.

[0014] In a possible design, it also includes: a control device;

[0015] The control device is electrically connected to the testing device;

[0016] The control device is used to control the state change of the valve component and to receive data transmitted by the flow sensor and the pressure sensor.

[0017] In one possible design, the valve assembly includes: a two-position five-way valve;

[0018] The two-position five-way valve comprises: a first interface, a second interface, a third interface, a fourth interface and a fifth interface, wherein the first interface is connected to the simulated lung, the second interface is connected to the negative flow generating device, the third interface is in a cut-off state, the fourth interface is connected to the ventilator to be tested, and the fifth interface is connected to the outside atmosphere;

[0019] When the two-position five-way valve is in the first position, the simulated lung, the first interface, the fourth interface and the ventilator to be tested are connected, and the negative flow generating device, the second interface, the fifth interface and the outside atmosphere are connected;

[0020] When the two-position five-way valve is in the second position, the negative flow generating device, the second interface, the fourth interface and the ventilator to be tested are connected, and the first interface and the third interface are connected.

[0021] In a possible design, a first throttle valve is provided between the fifth interface and the outside atmosphere, and the impedance of the fourth interface is made the same as the impedance of the fifth interface by adjusting the opening of the first throttle valve.

[0022] In one possible design, the valve assembly includes: a two-position three-way valve and a three-way valve;

[0023] The two-position three-way valve comprises a sixth interface, a seventh interface and an eighth interface, the sixth interface is connected to the negative flow generating device, and the eighth interface is connected to the outside atmosphere;

[0024] The three-way valve comprises a ninth interface, a tenth interface and an eleventh interface, the ninth interface is connected to the simulated lung, the tenth interface is connected to the seventh interface, and the eleventh interface is connected to the ventilator to be tested;

[0025] When the valve assembly is in the first position, the simulated lung, the ninth interface, the eleventh interface and the ventilator to be tested are connected, and the negative flow generating device, the sixth interface, the eighth interface and the external atmosphere are connected;

[0026] When the valve assembly is in the second position, the negative flow generating device, the sixth interface, the seventh interface, the tenth interface, the eleventh interface and the ventilator to be tested are connected.

[0027] In a possible design, a second throttle valve is provided between the eighth interface and the outside atmosphere, and the impedance of the seventh interface is made the same as the impedance of the eighth interface by adjusting the opening of the second throttle valve.

[0028] In a possible design, it also includes: a flow calibrator;

[0029] The flow calibrator is connected to the negative flow generating device and the testing device respectively.

[0030] In a possible design, it also includes: a pressure calibrator, a pressure changing device and a gas container;

[0031] The testing device is also provided with a pressure sampling port, and the pressure sampling port is arranged between the valve assembly and the ventilator to be tested;

[0032] The pressure calibrator, the pressure changing device, the gas container and the pressure sampling port are respectively connected through a four-way pipe.

[0033] In a second aspect, an embodiment of the present invention provides a testing method based on the above-mentioned testing system for a ventilator, the testing method comprising:

[0034] Connecting the simulated lung, the valve assembly of the test device and the ventilator to be tested through a pipeline;

[0035] Connecting the negative flow generating device and the valve assembly via a pipeline;

[0036] Controlling the position state of the valve assembly to change so that the negative flow generating device, the testing device and the ventilator to be tested are connected;

[0037] Using the flow sensor in the testing device to measure the real-time suction flow of the negative flow generating device;

[0038] The pressure sensor in the testing device is used to measure the outlet pressure of the ventilator to be tested.

[0039] In one possible design, the testing method further includes:

[0040] The control device is used to control the state change of the valve component, and the control device receives the data transmitted by the flow sensor and the pressure sensor.

[0041] As can be seen from the above scheme, the test system for the ventilator is provided with a valve assembly in the test device. When the valve assembly is in the first position, the simulated lung, the test device and the ventilator to be tested are connected. When the valve assembly is in the second position, the negative flow generating device, the test device and the ventilator to be tested are connected. Therefore, by changing the position of the valve assembly, the trigger flow and trigger pressure of the ventilator to be tested can be measured by the negative flow generating device, thereby quantitatively testing the trigger function of the ventilator and reducing the cost of the test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 is a structural schematic diagram of a test system for a ventilator provided by an embodiment of the present invention when the valve assembly is in a first position state;

[0044] Figure 2 It is a structural schematic diagram of a valve assembly of a test system for a ventilator provided by an embodiment of the present invention when it is in a second position state;

[0045] Figure 3 is a structural schematic diagram of a test system for a ventilator provided by another embodiment of the present invention when the valve assembly is in a first position state;

[0046] Figure 4is a structural schematic diagram of a test system for a ventilator provided by another embodiment of the present invention when the valve assembly is in a second position state;

[0047] Figure 5 is a structural schematic diagram of a test system for a ventilator provided by another embodiment of the present invention when in a calibration mode;

[0048] Figure 6 The figure is a flow chart of a method for testing a ventilator provided by one embodiment of the present invention.

[0049] Reference numerals:

[0050] 10- Ventilator to be tested;

[0051] 1- Test device;

[0052] 11-valve assembly;

[0053] 111-two-position five-way valve;

[0054] 111a-first interface;

[0055] 111b-second interface;

[0056] 111c - third interface;

[0057] 111d- fourth interface;

[0058] 111e-fifth interface;

[0059] 112- first throttle valve;

[0060] 113-two position three way valve;

[0061] 113a-sixth interface;

[0062] 113b-seventh interface;

[0063] 113c-eighth interface;

[0064] 114-three-way valve;

[0065] 114a- ninth interface;

[0066] 114b-10th interface;

[0067] 114c-11th interface;

[0068] 115 - second throttle valve;

[0069] 12-Flow sensor;

[0070] 13- Pressure sensor;

[0071] 14-pressure tapping port;

[0072] 2-Negative flow generating device;

[0073] 3- Simulated lung;

[0074] 4- Control device;

[0075] 5-Flow calibrator;

[0076] 61-pressure calibrator;

[0077] 62-pressure changing device;

[0078] 63- Gas container;

[0079] 64-Cross pipe. DETAILED DESCRIPTION

[0080] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0081] Figure 1 is a schematic structural diagram of a test system for a ventilator provided by an embodiment of the present invention when the valve assembly is in a first position state, Figure 2 It is a structural schematic diagram of a test system for a ventilator provided by an embodiment of the present invention when the valve assembly is in a second position state.

[0082] like Figure 1 and Figure 2 As shown, the test system for a ventilator comprises: a test device 1, a negative flow generating device 2 and a simulated lung 3;

[0083] The test device 1 is provided with a valve assembly 11, and the valve assembly 11 is respectively connected to the negative flow generating device 2, the simulated lung 3 and the ventilator to be tested 10 through pipelines;

[0084] A negative flow generating device 2, used for generating a suction flow;

[0085] The test device 1 is also provided with a flow sensor 12 and a pressure sensor 13. The flow sensor 12 is used to measure the real-time suction flow of the negative flow generating device 2, and the pressure sensor 13 is used to measure the outlet pressure of the ventilator 10 to be tested.

[0086] When the valve assembly 11 is in the first position, the simulated lung 3, the test device 1 and the ventilator to be tested 10 are connected;

[0087] When the valve assembly 11 is in the second position, the negative flow generating device 2, the testing device 1 and the ventilator 10 to be tested are connected.

[0088] In the embodiment of the present invention, the test system for the ventilator is provided with a valve assembly 11 in the test device 1. When the valve assembly 11 is in a first position, the simulated lung 3, the test device 1 and the ventilator 10 to be tested are connected. When the valve assembly 11 is in a second position, the negative flow generating device 2, the test device 1 and the ventilator 10 to be tested are connected. Therefore, by changing the position of the valve assembly 11, the trigger flow and trigger pressure of the ventilator 10 to be tested can be measured by the negative flow generating device 2, thereby quantitatively testing the trigger function of the ventilator and reducing the cost of the test equipment.

[0089] As described in the first test method in the background technology, the simulated lung is generally artificially pinched and then released (or other similar actions), and the elasticity of the simulated lung 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. The disadvantage of this test method is that it is impossible to accurately achieve the required negative pressure and suction flow, and can only qualitatively test the trigger function of the ventilator, but cannot quantitatively test the trigger function of the ventilator. However, the test system provided in the embodiment of the present invention adds a negative flow generating device 2, and replaces the simulated lung 3 to test the trigger flow and trigger pressure, so that the trigger function of the ventilator can be quantitatively tested, and at the same time, the test cost can be reduced compared with the third test method in the background technology.

[0090] It should be noted that the negative flow generating device 2 may refer to any device capable of generating negative flow (or suction flow), such as an air pump. Moreover, the negative flow generating device 2 also has a flow regulating function, such as being able to adjust the suction flow through its built-in flow regulating valve. The simulated lung 3 is used to simulate the lungs in the human body, wherein the simulated lung 3 may be a bladder, a splint lung, etc.

[0091] In one embodiment of the present invention, the test system for a ventilator further comprises: a control device 4;

[0092] The control device 4 is electrically connected to the testing device 1;

[0093] The control device 4 is used to control the state change of the valve assembly 11 and to receive data transmitted by the flow sensor 12 and the pressure sensor 13 .

[0094] In the embodiment of the present invention, the state change of the valve assembly 11 can be controlled by setting the control device 4. The control device 4 has a processing function, a storage function, a sending and receiving function, a display function, etc. For example, the control device 4 can be a computer. By running the test software for the ventilator in the computer, the trigger frequency of the ventilator 10 to be tested can be set and monitored, and the trigger flow and trigger pressure of the ventilator 10 to be tested can also be determined based on the data transmitted by the receiving flow sensor 12 and the pressure sensor 13. Therefore, by setting the control device 4, the state change of the valve assembly 11 can be automatically and timed, thereby simulating the accurate triggering action of the ventilator 10 to be tested, and then realizing accurate testing of the spontaneous breathing frequency, trigger flow and trigger pressure of the ventilator. It should be noted that Figure 1 and Figure 2 In the figure, the control device 4 is electrically connected to the valve assembly 11, the flow sensor 12 and the pressure sensor 13, respectively, as shown by the dotted lines.

[0095] Of course, the test system may not include the control device 4. For example, the state change of the valve assembly 11 may be manually controlled by an operator, and the data transmitted by the flow sensor 12 and the pressure sensor 13 may be transmitted to an external display device for observation by the operator.

[0096] In one embodiment of the present invention, the valve assembly 11 includes: a two-position five-way valve 111;

[0097] The two-position five-way valve 111 includes: a first interface 111a, a second interface 111b, a third interface 111c, a fourth interface 111d and a fifth interface 111e, the first interface 111a is connected to the simulated lung 3, the second interface 111b is connected to the negative flow generating device 2, the third interface 111c is in a cut-off state, the fourth interface 111d is connected to the ventilator to be tested 10, and the fifth interface 111e is connected to the outside atmosphere;

[0098] When the two-position five-way valve 111 is in the first position, the simulated lung 3, the first interface 111a, the fourth interface 111d are connected to the ventilator 10 to be tested, and the negative flow generating device 2, the second interface 111b, the fifth interface 111e are connected to the outside atmosphere;

[0099] When the two-position five-way valve 111 is in the second position, the negative flow generating device 2, the second interface 111b, the fourth interface 111d and the ventilator to be tested 10 are connected, and the first interface 111a and the third interface 111c are connected.

[0100] In the embodiment of the present invention, the valve assembly 11 includes a two-position five-way valve 111, and the position state of the two-position five-way valve 111 is changed by the control device 4, so as to realize the triggering action of the ventilator 10 to be tested. When the two-position five-way valve 111 is in the first position state, the negative flow generating device 2 is always connected with the outside atmosphere, so that the pipeline of the negative flow generating device 2 is maintained in a negative pressure state; when the position state of the two-position five-way valve 111 changes (i.e., from the first position state to the second position state), since the pipeline of the negative flow generating device 2 is maintained in a negative pressure state, a suction flow can be smoothly formed in the pipeline.

[0101] In one embodiment of the present invention, a first throttle valve 112 is provided between the fifth interface 111e and the outside atmosphere, and the impedance of the fourth interface 111d is made equal to the impedance of the fifth interface 111e by adjusting the opening of the first throttle valve 112.

[0102] Since the apertures of the fourth interface 111d and the fifth interface 111e of the two-position five-way valve 111 are not necessarily the same, the impedances generated when the airflow passes through the fourth interface 111d and the fifth interface 111e are also different, which will affect the accurate measurement of the trigger flow and the trigger pressure. In the embodiment of the present invention, a first throttle valve 112 is provided between the fifth interface 111e and the outside atmosphere, and the impedance of the fourth interface 111d is made the same as the impedance of the fifth interface 111e by adjusting the opening of the first throttle valve 112, so that the flow sensor 12 and the pressure sensor 13 can measure the trigger flow and the trigger pressure in the pipeline more accurately.

[0103] Figure 3 is a structural schematic diagram of a test system for a ventilator provided by another embodiment of the present invention when the valve assembly is in a first position state, Figure 4 It is a structural schematic diagram of a test system for a ventilator provided by another embodiment of the present invention when the valve assembly is in a second position state.

[0104] like Figure 3 and Figure 4 As shown, in one embodiment of the present invention, the valve assembly 11 includes: a two-position three-way valve 113 and a three-way valve 114;

[0105] The two-position three-way valve 113 includes a sixth interface 113a, a seventh interface 113b and an eighth interface 113c, the sixth interface 113a is connected to the negative flow generating device 2, and the eighth interface 113c is connected to the outside atmosphere;

[0106] The three-way valve 114 includes a ninth interface 114a, a tenth interface 114b and an eleventh interface 114c, the ninth interface 114a is connected to the simulated lung 3, the tenth interface 114b is connected to the seventh interface 113b, and the eleventh interface 114c is connected to the ventilator 10 to be tested;

[0107] When the valve assembly 11 is in the first position, the simulated lung 3, the ninth interface 114a, the eleventh interface 114c are connected to the ventilator 10 to be tested, and the negative flow generating device 2, the sixth interface 113a, the eighth interface 113c are connected to the outside atmosphere;

[0108] When the valve assembly 11 is in the second position, the negative flow generating device 2, the sixth interface 113a, the seventh interface 113b, the tenth interface 114b, the eleventh interface 114c and the ventilator 10 to be tested are connected.

[0109] In the embodiment of the present invention, the valve assembly 11 includes a two-position three-way valve 113 and a three-way valve 114. The position states of the two-position three-way valve 113 and the three-way valve 114 are changed by the control device 4, so as to realize the triggering action of the ventilator 10 to be tested. When the valve assembly 11 is in the first position state, the negative flow generating device 2 is always connected with the outside atmosphere, so that the pipeline of the negative flow generating device 2 is kept in a negative pressure state; when the position state of the valve assembly 11 changes (i.e., from the first position state to the second position state), since the pipeline of the negative flow generating device 2 is kept in a negative pressure state, the suction flow can be smoothly formed in the pipeline.

[0110] In one embodiment of the present invention, a second throttle valve 115 is provided between the eighth interface 113c and the outside atmosphere, and the impedance of the seventh interface 113b and the impedance of the eighth interface 113c are made the same by adjusting the opening of the second throttle valve 115.

[0111] Since the apertures of the seventh interface 113b and the eighth interface 113c of the two-position three-way valve 113 are not necessarily the same, the impedances generated when the airflow passes through the seventh interface 113b and the eighth interface 113c are also different, which will affect the accurate measurement of the trigger flow and the trigger pressure. In the embodiment of the present invention, a second throttle valve 115 is provided between the eighth interface 113c and the outside atmosphere, and the impedance of the seventh interface 113b and the impedance of the eighth interface 113c are made the same by adjusting the opening of the second throttle valve 115, so that the flow sensor 12 and the pressure sensor 13 can measure the trigger flow and the trigger pressure in the pipeline more accurately.

[0112] Figure 5 It is a structural schematic diagram of a test system for a ventilator provided by another embodiment of the present invention when it is in a calibration mode.

[0113] like Figure 5 As shown, in an embodiment of the present invention, the test system for a ventilator further includes: a flow calibrator 5;

[0114] The flow calibrator 5 is respectively connected to the negative flow generating device 2 and the test device 1.

[0115] In an embodiment of the present invention, the flow calibrator 5 is a standard flowmeter or a device with a standard flowmeter (such as a respiratory tester). By connecting the flow calibrator 5 in series between the negative flow generating device 2 and the test device 1, calibration of the flow sensor 12 of the test device 1 can be achieved.

[0116] In an embodiment of the present invention, the test system for a ventilator further includes: a pressure calibrator 61, a pressure change device 62, and a gas container 63;

[0117] The test device 1 is further provided with a pressure sampling port 14, which is arranged between the valve assembly 11 and the ventilator to be tested 10;

[0118] The pressure calibrator 61, the pressure change device 62, the gas container 63, and the pressure sampling port 14 are respectively connected through a four-way pipe 64.

[0119] In an embodiment of the present invention, the pressure calibrator 61 is a standard pressure gauge; the pressure change device 62 is a device that can generate positive or negative pressure, such as a syringe; the gas container 63 is used to make the readings of the pressure calibrator 61 and the pressure sensor 13 change relatively slowly when the pressure change device 62 generates a pressure change, so as to better perform pressure calibration, that is, to play a role in buffering pressure. The gas container 63 can be a leather bag or a bellows lung, etc. By connecting the pressure calibrator 61, the pressure change device 62, the gas container 63, and the pressure sampling port 14 through the four-way pipe 64 respectively, calibration of the pressure sensor 13 of the test device 1 can be achieved.

[0120] Figure 6 It is a flowchart of a test method for a ventilator provided by an embodiment of the present invention.

[0121] As Figure 6 shown, this test method is based on the test system for a ventilator mentioned above, and this test method includes:

[0122] S1. Connect the simulated lung 3, the valve assembly 11 of the test device 1, and the ventilator to be tested 10 through pipelines;

[0123] S2. Connect the negative flow generating device 2 and the valve assembly 11 through pipelines;

[0124] S3. Control the position state of the valve assembly 11 to change, so that the negative flow generating device 2, the test device 1, and the ventilator to be tested 10 are connected;

[0125] S4, using the flow sensor 12 in the testing device 1 to measure the real-time suction flow of the negative flow generating device 2;

[0126] S5. Use the pressure sensor 13 in the testing device 1 to measure the outlet pressure of the ventilator 10 to be tested.

[0127] In the embodiment of the present invention, the test method for the ventilator is to set the valve assembly 11 in the test device 1. When the valve assembly 11 is in the first position, the simulated lung 3, the test device 1 and the ventilator 10 to be tested are connected. When the valve assembly 11 is in the second position, the negative flow generating device 2, the test device 1 and the ventilator 10 to be tested are connected. Therefore, by changing the position of the valve assembly 11, the trigger flow and trigger pressure of the ventilator 10 to be tested can be measured by the negative flow generating device 2, thereby quantitatively testing the trigger function of the ventilator and reducing the cost of the test equipment.

[0128] In one embodiment of the present invention, the testing method further comprises:

[0129] The control device 4 is used to control the state change of the valve assembly 11 , and the control device 4 receives data transmitted by the flow sensor 12 and the pressure sensor 13 .

[0130] In the embodiment of the present invention, the state change of the valve assembly 11 can be controlled by setting the control device 4. The control device 4 has a processing function, a storage function, a sending and receiving function, a display function, etc. For example, the control device 4 can be a computer. By running the test software for the ventilator in the computer, the trigger frequency of the ventilator 10 to be tested can be set and monitored, and the trigger flow and trigger pressure of the ventilator 10 to be tested can also be determined based on the data transmitted by the receiving flow sensor 12 and the pressure sensor 13. Therefore, by setting the control device 4, the state change of the valve assembly 11 can be automatically and regularly changed, thereby simulating the accurate triggering action of the ventilator 10 to be tested, and then realizing accurate testing of the spontaneous breathing frequency, trigger flow and trigger pressure of the ventilator.

[0131] In summary, the test system for a ventilator provided by each of the embodiments of the present invention has at least the following beneficial effects:

[0132] 1. In the embodiment of the present invention, the test system for a ventilator is provided with a valve assembly 11 in the test device 1. When the valve assembly 11 is in a first position, the simulated lung 3, the test device 1 and the ventilator 10 to be tested are connected. When the valve assembly 11 is in a second position, the negative flow generating device 2, the test device 1 and the ventilator 10 to be tested are connected. Therefore, by changing the position of the valve assembly 11, the trigger flow and trigger pressure of the ventilator 10 to be tested can be measured by the negative flow generating device 2, thereby being able to quantitatively test the trigger function of the ventilator and reduce the cost of the test equipment.

[0133] 2. In the embodiment of the present invention, the state change of the valve assembly 11 can be controlled by setting the control device 4. The control device 4 has a processing function, a storage function, a sending and receiving function, a display function, etc. For example, the control device 4 can be a computer. By running the test software for the ventilator in the computer, the trigger frequency of the ventilator 10 to be tested can be set and monitored, and the trigger flow and trigger pressure of the ventilator 10 to be tested can also be determined based on the data transmitted by the receiving flow sensor 12 and the pressure sensor 13. Therefore, by setting the control device 4, the state change of the valve assembly 11 can be automatically and regularly changed, thereby simulating the accurate triggering action of the ventilator 10 to be tested, and then realizing accurate testing of the spontaneous breathing frequency, trigger flow and trigger pressure of the ventilator.

[0134] 3. In the embodiment of the present invention, the valve assembly 11 includes a two-position five-way valve 111, and the position state of the two-position five-way valve 111 is changed by the control device 4, so as to realize the triggering action of the ventilator 10 to be tested. When the two-position five-way valve 111 is in the first position state, the negative flow generating device 2 is always connected with the outside atmosphere, so that the pipeline of the negative flow generating device 2 is kept in a negative pressure state; when the position state of the two-position five-way valve 111 changes (i.e., from the first position state to the second position state), since the pipeline of the negative flow generating device 2 is kept in a negative pressure state, the suction flow can be smoothly formed in the pipeline.

[0135] 4. In an embodiment of the present invention, a first throttle valve 112 is arranged between the fifth interface 111e and the outside atmosphere. By adjusting the opening of the first throttle valve 112, the impedance of the fourth interface 111d is made the same as the impedance of the fifth interface 111e, so that the flow sensor 12 and the pressure sensor 13 can measure the trigger flow and trigger pressure in the pipeline more accurately.

[0136] 5. In the embodiment of the present invention, by connecting the flow calibrator 5 in series between the negative flow generating device 2 and the testing device 1, the flow sensor 12 of the testing device 1 can be calibrated; by connecting the pressure calibrator 61, the pressure changing device 62, the gas container 63 and the pressure sampling port 14 respectively through the four-way pipe 64, the pressure sensor 13 of the testing device 1 can be calibrated.

[0137] It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the test system for a ventilator. In other embodiments of the present invention, the test system for a ventilator may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0138] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the existence of other identical factors in the process, method, article or device including the elements.

[0139] In the above embodiments, the hardware unit can be realized by mechanical means or electrical means. For example, a hardware unit can include permanent dedicated circuits or logic (such as special processors, FPGA or ASIC) to complete the corresponding operation. The hardware unit can also include programmable logic or circuits (such as general-purpose processors or other programmable processors), which can be temporarily set by software to complete the corresponding operation. Concrete implementation (mechanical means or dedicated permanent circuits or temporarily set circuits) can be determined based on cost and time considerations.

[0140] The present invention is shown and described in detail above through the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Based on the above multiple embodiments, those skilled in the art can know that the code review methods in the above different embodiments can be combined to obtain more embodiments of the present invention, and these embodiments are also within the protection scope of the present invention.

Claims

1. Test system for ventilator, It is characterized in that include: A test device (1), a negative flow generating device (2) and a simulated lung (3); The test device (1) is provided with a valve assembly (11), and the valve assembly (11) is respectively connected to the negative flow generating device (2), the simulated lung (3) and the ventilator to be tested (10) through pipelines; The negative flow generating device (2) is used to generate a suction flow; The test device (1) is further provided with a flow sensor (12) and a pressure sensor (13), wherein the flow sensor (12) is used to measure the real-time suction flow of the negative flow generating device (2), and the pressure sensor (13) is used to measure the outlet pressure of the ventilator (10) to be tested; When the valve assembly (11) is in the first position, the simulated lung (3), the test device (1) and the ventilator to be tested (10) are connected; When the valve assembly (11) is in the second position, the negative flow generating device (2), the testing device (1) and the ventilator to be tested (10) are connected; Also included: a flow calibrator (5); The flow calibrator (5) is connected to the negative flow generating device (2) and the testing device (1) respectively; It also includes: a pressure calibrator (61), a pressure changing device (62) and a gas container (63); The testing device (1) is further provided with a pressure sampling port (14), and the pressure sampling port (14) is arranged between the valve assembly (11) and the ventilator (10) to be tested; The pressure calibrator (61), the pressure changing device (62), the gas container (63) and the pressure sampling port (14) are respectively connected via a four-way pipe (64).

2. The test system for a ventilator according to claim 1, It is characterized in that Also includes: Control device (4); The control device (4) is electrically connected to the testing device (1); The control device (4) is used to control the state change of the valve component (11) and to receive data transmitted by the flow sensor (12) and the pressure sensor (13).

3. The test system for a ventilator according to claim 2, It is characterized in that The valve assembly (11) comprises: a two-position five-way valve (111); The two-position five-way valve (111) comprises: a first interface (111a), a second interface (111b), a third interface (111c), a fourth interface (111d) and a fifth interface (111e), wherein the first interface (111a) is connected to the simulated lung (3), the second interface (111b) is connected to the negative flow generating device (2), the third interface (111c) is in a cut-off state, the fourth interface (111d) is connected to the ventilator to be tested (10), and the fifth interface (111e) is connected to the outside atmosphere; When the two-position five-way valve (111) is in the first position state, the simulated lung (3), the first interface (111a), the fourth interface (111d) and the ventilator under test (10) are in communication, and the negative flow generating device (2), the second interface (111b), the fifth interface (111e) and the outside atmosphere are in communication; When the two-position five-way valve (111) is in the second position state, the negative flow generating device (2), the second interface (111b), the fourth interface (111d) and the ventilator under test (10) are in communication, and the first interface (111a) and the third interface (111c) are connected.

4. The test system for a ventilator according to claim 3, wherein, a first throttle valve (112) is provided between the fifth interface (111e) and the outside atmosphere, and the impedance of the fourth interface (111d) is made the same as the impedance of the fifth interface (111e) by adjusting the opening degree of the first throttle valve (112).

5. The test system for a ventilator according to claim 1, wherein, the valve assembly (11) includes: a two-position three-way valve (113) and a three-way valve (114); the two-position three-way valve (113) includes a sixth interface (113a), a seventh interface (113b) and an eighth interface (113c), the sixth interface (113a) is connected to the negative flow generating device (2), and the eighth interface (113c) is connected to the outside atmosphere; the three-way valve (114) includes a ninth interface (114a), a tenth interface (114b) and an eleventh interface (114c), the ninth interface (114a) is connected to the simulated lung (3), the tenth interface (114b) is connected to the seventh interface (113b), and the eleventh interface (114c) is connected to the ventilator under test (10); When the valve assembly (11) is in the first position state, the simulated lung (3), the ninth interface (114a), the eleventh interface (114c) and the ventilator under test (10) are in communication, and the negative flow generating device (2), the sixth interface (113a), the eighth interface (113c) and the outside atmosphere are in communication; When the valve assembly (11) is in the second position state, the negative flow generating device (2), the sixth interface (113a), the seventh interface (113b), the tenth interface (114b), the eleventh interface (114c) and the ventilator under test (10) are in communication.

6. The test system for a ventilator according to claim 5, wherein, a second throttle valve (115) is provided between the eighth interface (113c) and the outside atmosphere, and the impedance of the seventh interface (113b) is made the same as the impedance of the eighth interface (113c) by adjusting the opening degree of the second throttle valve (115).

7. A test method for a test system for a ventilator according to any one of claims 1-6, wherein, The test method includes: The simulated lung (3), the valve assembly (11) of the test device (1) and the ventilator to be tested (10) are connected via a pipeline; Connecting the negative flow generating device (2) and the valve assembly (11) via a pipeline; Controlling the change in the position state of the valve assembly (11) so that the negative flow generating device (2), the testing device (1) and the breathing machine to be tested (10) are connected; Using the flow sensor (12) in the testing device (1) to measure the real-time suction flow of the negative flow generating device (2); The pressure sensor (13) in the testing device (1) is used to measure the outlet pressure of the breathing machine (10) to be tested.

8. The testing method of the testing system for a ventilator according to claim 7, It is characterized in that The test method also includes: The control device (4) is used to control the state change of the valve component (11), and the control device (4) receives data transmitted by the flow sensor (12) and the pressure sensor (13).

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