CN106762526B

CN106762526B - Gas pumping and exhausting device and using method thereof

Info

Publication number: CN106762526B
Application number: CN201611185810.4A
Authority: CN
Inventors: 陈杰; 方以群; 闫硕; 包晓辰; 攸璞; 李娜; 邵滨
Original assignee: Navy Medicine Research Institute of PLA
Current assignee: Navy Medicine Research Institute of PLA
Priority date: 2016-12-20
Filing date: 2016-12-20
Publication date: 2020-05-22
Anticipated expiration: 2036-12-20
Also published as: CN106762526A

Abstract

A gas pumping and exhausting device and a using method thereof comprise the following steps: a cylinder having a cylinder barrel, a piston, and a connecting rod; the cylinder barrel is provided with a gas output end and a gas input end; the piston is positioned in the cylinder barrel; one end of the connecting rod is connected with the piston; the motor is connected with the other end of the connecting rod and can drive the connecting rod to do single-shaft reciprocating motion, so that the connecting rod can drive the piston to do single-shaft reciprocating motion in the cylinder barrel. The gas pumping device can better realize the simulation of inspiration and expiration of a human body.

Description

Gas pumping and exhausting device and using method thereof

Technical Field

The invention relates to the field of diving equipment, in particular to a gas pumping and exhausting device and a using method thereof.

Background

The traditional diving breathing apparatus consists of an aerobic gas cylinder, a primary pressure reducing valve, a secondary pressure reducing valve and a mouthpiece, which are commonly called as 'hydropneum'. Scuba diving apparatus can be divided into open type scuba diving apparatus, semi-closed type scuba diving apparatus and closed type scuba diving apparatus.

Breathing resistance of a scuba is one of the main causes of increased diver load during diving. The general diver relies on changing the breathing intensity and mode under water, and the like, so that the breathing resistance is adapted to the change to ensure the breathing flow. Respiratory resistance is also an important evaluation index for evaluating a scuba. The scuba serves as a personal underwater breathing protection device, and has important significance in detecting the breathing resistance of the scuba.

If the breathing resistance of the diving respirator is tested by adopting a real person to carry out an underwater experiment, the safety of diving personnel needs to be strictly controlled. Moreover, if people are used for testing, the condition that the breathing is temporarily stopped but the heartbeat still exists can occur, and the accurate testing of the scuba is influenced. Therefore, during the test, the respiratory heart rate and respiratory frequency of the diver need to be detected at all times.

Disclosure of Invention

The invention aims to provide a gas pumping and exhausting device and a using method thereof so as to better realize the simulation of inspiration and expiration of a human body.

In order to solve the above problems, the present invention provides a gas pumping device, comprising:

a cylinder having a cylinder barrel, a piston, and a connecting rod;

the cylinder barrel is provided with a gas output end and a gas input end;

the piston is positioned in the cylinder barrel;

one end of the connecting rod is connected with the piston;

the motor is connected with the other end of the connecting rod and can drive the connecting rod to do single-shaft reciprocating motion, so that the connecting rod can drive the piston to do single-shaft reciprocating motion in the cylinder barrel.

Optionally, the displacement of the cylinder is greater than or equal to the maximum lung capacity of the human body.

Optionally, the gas pumping device further comprises: and the speed control system is used for controlling the movement speed of the connecting rod in the single-shaft reciprocating motion.

Optionally, the gas pumping device further comprises: and the resistance monitoring system is used for monitoring the resistance applied when the piston moves in the cylinder barrel.

In order to solve the above problems, the present invention further provides a method for using a gas pumping device, the gas pumping device comprising:

a cylinder having a cylinder barrel, a piston, and a connecting rod;

the cylinder barrel is provided with a gas output end and a gas input end;

the piston is positioned in the cylinder barrel;

one end of the connecting rod is connected with the piston;

the motor is connected with the other end of the connecting rod;

the using method comprises the following steps:

the motor is adopted to control the connecting rod to do single-shaft reciprocating motion, and the connecting rod drives the piston to reciprocate in the cylinder barrel;

when the piston is applied to the direction far away from the gas output end and the gas input end, the gas input end is opened, the gas output end is closed, and the cylinder sucks corresponding breathing gas into the cylinder barrel from the gas input end to complete the simulation of the inspiration action of the human body;

when the piston is applied to the direction close to the gas output end and the gas input end, the gas input end is closed, the gas output end is opened, the cylinder discharges the breathing gas in the cylinder barrel from the gas output end out of the cylinder barrel, and the simulation of the exhalation action of the human body is completed.

Optionally, the displacement of the cylinder is greater than or equal to the maximum lung capacity of a human body, and the volume of the breathing gas drawn into the cylinder is controlled by controlling the stroke of the piston in the cylinder.

Optionally, the gas pumping device further comprises a speed control system, and the speed of the piston is controlled by the speed control system.

Optionally, the piston is controlled to be divided into two movement phases in a one-way movement process, wherein the movement speed of the first movement phase is greater than the movement speed of the second movement phase.

Optionally, the gas pumping device further comprises a resistance monitoring system, and the resistance of the piston in the movement process is monitored through the resistance monitoring system.

Optionally, the piston is arranged to reciprocate at different speeds, and the resistance experienced by the piston during each reciprocation is monitored.

Compared with the prior art, the technical scheme of the invention has the following advantages:

in the technical scheme of the invention, the gas pumping and exhausting device comprises a cylinder, wherein the cylinder is provided with a cylinder barrel, a piston and a connecting rod; the cylinder barrel is provided with a gas output end and a gas input end; the piston is positioned in the cylinder barrel; one end of the connecting rod is connected with the piston; the motor is connected with the other end of the connecting rod and can drive the connecting rod to do single-shaft reciprocating motion, so that the connecting rod can drive the piston to do single-shaft reciprocating motion in the cylinder barrel. The gas pumping and exhausting device is simple in structure, can realize full simulation of the inspiration and expiration processes of a human body by using the corresponding using method, is simple in the whole process and easy to operate, and can realize simulation of various breathing intensities and breathing frequencies by using the using method, so that conditions are provided for directly and comprehensively testing the corresponding scuba.

Drawings

FIG. 1 is a schematic diagram of an underwater breathing simulation apparatus provided by an embodiment of the present invention;

FIG. 2 is a schematic view of a gas pumping arrangement in the underwater breathing simulation device shown in FIG. 1;

FIG. 3 is a schematic view of a first oxygen-consuming device of the underwater breathing simulation apparatus of FIG. 1;

FIG. 4 is a schematic view of a second oxygen consumption device of the underwater breathing simulation apparatus shown in FIG. 1;

FIG. 5 is a schematic view of an underwater breathing simulation apparatus according to another embodiment of the present invention;

fig. 6 is a schematic view of an underwater respiration simulation apparatus according to another embodiment of the present invention.

Detailed Description

In the prior art, a method and equipment for performing non-underwater tests on various types of scuba diving apparatuses do not exist, and a better breathing resistance test method does not exist, and devices such as a corresponding breathing power simulation device and an oxygen consumption device which are suitable for testing the scuba diving apparatuses do not exist.

Therefore, the invention provides an underwater respiration simulation device and an underwater respiration simulation method thereof, the underwater respiration simulation device divides the respiration process of a human body into two main processes, one is an inspiration process and an expiration process, and the other is an oxygen consumption process. Because the breathing process when breathing analogue means under water can really dive to the diver simulates, consequently, breathing analogue means under water can be used for testing scuba to needn't just can test scuba's each item performance through the real dive of diver, for example can test scuba's breathing resistance. Thereby saving the testing cost and putting an end to the potential safety hazard of personnel. Simultaneously, because needn't just can test scuba through the true dive of diver, can also improve scuba's the convenient performance of test. The underwater respiration simulation method can realize simulation of the corresponding respiration process of a diver during real diving by using the underwater respiration simulation device, saves test time and improves test efficiency.

The invention also provides a gas pumping device and a using method thereof, so as to better realize the simulation of inspiration and expiration of a human body.

The invention also provides an oxygen consumption device and a using method thereof, so as to better realize the simulation of the oxygen consumption process of the human body.

The invention also provides a breathing resistance testing method of the diving respirator, so as to better test the breathing resistance of the diving respirator.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The embodiment of the invention provides an underwater respiration simulation device.

Referring to fig. 1, the underwater respiration simulation apparatus includes a pressure chamber 110, a gas pumping device 120, an oxygen consumption device 130, a carbon dioxide supplement device 140, a humidifying device 150, and a gas mixing device 160.

In this embodiment, the pressure chamber 110 may be a closed chamber body, so that the pressure inside the pressure chamber 110 can be raised by introducing gas or the like. However, there may be some venting lines in the pressure chamber 110 that communicate with the outside, such as in fig. 1, the venting lines between the gas evacuation device 120 and the gas source 100 pass from the pressure chamber 110 through the pressure chamber 110 to the gas source 100 outside the chamber. Likewise, the gas output of the gas mixing device 160 corresponds to a vent line from the interior of the pressure chamber 110, through the pressure chamber 110, and out of the chamber.

In this embodiment, the pressure range in the pressure chamber 110 may be set to 4MPa to 5MPa according to the underwater pressure environment to be simulated, so as to simulate the real diving pressure condition.

In this embodiment, a gas evacuation device 120 is located within the pressure chamber 110 for drawing in breathing gas from the gas source 100 and for evacuating the breathing gas to simulate the inspiratory and expiratory actions of a human. The suction of the breathing gas from the gas source 100 means that the gas pumping device 120 pumps the breathing gas originally stored in the gas cylinder (in this case, the gas source 100 is the gas cylinder storing the breathing gas) into the whole underwater breathing simulation device through the pumping action of the gas pumping device 120 (this process includes pumping the breathing gas into the gas pumping device 120). The exhausting of the breathing gas means that the gas pumping device 120 exhausts the gas processed by the whole underwater breathing simulation device out of the underwater breathing simulation device (this process includes exhausting the breathing gas from the inside of the gas pumping device 120), and the flowing power of the breathing gas mainly comes from the fact that the gas pumping device 120 exhausts the breathing gas in the inside of the gas pumping device 120, so that the gas output end of the whole underwater breathing simulation device exhausts the breathing gas with a corresponding volume.

In this embodiment, the oxygen consumption device 130 is located in the pressure chamber 110 for consuming at least part of the oxygen in the breathing gas to simulate the consumption of oxygen by a human body. Since the human body does not consume all of the oxygen in the inhaled gas, the oxygen consumption device 130 usually does not consume all of the oxygen in the breathing gas, but a part of the oxygen remains in the breathing gas discharged by the underwater breathing simulation device.

In this embodiment, a carbon dioxide supplementing device 140 is located within the pressure chamber 110 for supplementing carbon dioxide to the breathing gas that has passed through the oxygen consuming device 130 to simulate the production of carbon dioxide by a human body.

In this embodiment, the oxygen consumption device 130 is used to simulate the process of oxygen consumption by a human body, and the carbon dioxide supplement device 140 is used to simulate the process of carbon dioxide production by a human body, so that the two processes are completely separated, quantitative control of oxygen consumption and carbon dioxide production is facilitated, and the carbon dioxide supplement device 140 can be omitted under certain conditions, thereby simplifying the structure. That is, the present embodiment separates the human body from the gas exchange process of consuming oxygen and forming carbon dioxide into two processes for treatment.

In this embodiment, a humidifying device 150 is located within the pressure chamber 110 for humidifying the breathing gas to simulate the humidity of the exhaled air of a human body. The humidifying device 150 may be a device that generates moisture, and the humidifying device may humidify the corresponding breathing gas to the humidity level of the exhaled gas of the human body as needed.

In this embodiment, a gas mixing device 160 is located within the pressure chamber 110 for mixing the breathing gas passing through the oxygen-consuming device 130 with supplemental carbon dioxide (carbon dioxide provided by the carbon dioxide supplemental device 140) and moisture (moisture provided by the humidifying device 150).

With continued reference to fig. 1, the gas input of the gas pumping device 120 is connected to the gas source 100, and the gas output of the gas pumping device 120 is connected to the gas input of the oxygen consumption device 130.

In this embodiment, the gas source 100 is located outside the pressure chamber 110 of the underwater breathing simulation device. The gas source 100 may be a cylinder containing liquid air. The pressure of the gas in the gas cylinder can be 30MPa to 40 MPa. In other embodiments, the gas source 100 may be located within the pressure chamber 110.

With continued reference to fig. 1, a first gas input of the gas mixing device 160 is connected to the gas output of the oxygen consumption device 130, a second gas input of the gas mixing device 160 is connected to the gas output of the carbon dioxide supplement device 140, and a third gas input of the gas mixing device 160 is connected to the output of the humidification device 150.

In this embodiment, the gas mixing device 160 has three gas inputs and is connected to the gas output of the oxygen consumption device 130, the gas output of the carbon dioxide supplement device 140, and the output of the humidification device 150, respectively. In other embodiments, the gas mixing device 160 may have more than four gas input ends, as long as each of the output ends is connected to the input end of the gas mixing device 160. In other embodiments, when the carbon dioxide supplement device 140 is not provided, the gas mixing device 160 may correspondingly eliminate the gas input corresponding to the carbon dioxide supplement device 140, and therefore, the gas mixing device 160 may have only two gas inputs.

In this embodiment, the gas mixing device 160 may have a gas mixing turbine (not shown) inside, and by the rotation of the turbine, the different components input into the gas mixing device 160 are mixed sufficiently.

With continued reference to fig. 1, a first pressure reducing valve 171 and a second pressure reducing valve 172 are provided between the gas source 100 and the gas pumping device 120, the first pressure reducing valve 171 and the second pressure reducing valve 172 are located in the pressure chamber 110, and the second pressure reducing valve 172 is located between the first pressure reducing valve 171 and the gas pumping device 120.

In this embodiment, the breathing gas in the gas source 100 can be reduced from a pressure range of 30MPa to 40MPa to a pressure substantially equal to the ambient pressure in the pressure chamber 110 by the pressure reduction effect of the first pressure reducing valve 171 and the second pressure reducing valve 172, or the pressure range of the breathing gas can be reduced to a pressure slightly higher than the ambient pressure in the pressure chamber 110 (the ambient pressure is the pressure in the pressure chamber 100), for example, about 0kPa to 500kPa higher than the ambient pressure, after the pressure reduction effect of the first pressure reducing valve 171 and the second pressure reducing valve 172. The first pressure reducing valve 171 can reduce the pressure of 30 to 40MPa to about 10 MPa.

The first pressure reducing valve 171 and the second pressure reducing valve 172 are arranged in the pressure chamber 110, so that the first pressure reducing valve 171 and the second pressure reducing valve 172 can work in a pressure environment closer to the pressure of real diving, and the simulation level of the whole underwater breathing simulation device is improved.

In the present embodiment, the first pressure reducing valve 171 and the second pressure reducing valve 172 are part of the whole underwater breathing simulation apparatus, but in other embodiments, the underwater breathing simulation apparatus may not include the first pressure reducing valve 171 and the second pressure reducing valve 172, and the first pressure reducing valve 171 and the second pressure reducing valve 172 are part of the corresponding scuba.

With continued reference to fig. 1, a first check valve 101 is disposed between the second pressure reducing valve 172 and the gas pumping device 120, and a second check valve 102 is disposed between the gas pumping device 120 and the oxygen consumption device 130.

In this embodiment, the first one-way valve 101 is used to control the one-way flow of the respective breathing gas from the second pressure reducing valve 172 to the gas pumping device 120. The second one-way valve 102 is used to control the one-way flow of the respective breathing gas from the gas pumping device 120 to the oxygen consuming device 130.

With continued reference to fig. 1, a third check valve 103 is provided between the oxygen consumption device 130 and the gas mixing device 160, a fourth check valve 104 is provided between the carbon dioxide supplementing device 140 and the gas mixing device 160, a fifth check valve 105 is provided between the humidifying device 150 and the gas mixing device 160, and a sixth check valve 106 is provided at the gas output end of the humidifying device 150.

In this embodiment, the unidirectional flow of breathing gas from the oxygen-consuming device 130 to the gas mixing device 160 is controlled by the third one-way valve 103. The fourth check valve 104 controls the one-way flow of the carbon dioxide generated from the carbon dioxide supplement device 140 to the gas mixing device 160. The fifth check valve 105 controls the moisture supplemented by the humidifying device 150 to flow in one direction to the gas mixing device 160, and the sixth check valve 106 controls the mixed gas to be output in one direction from the gas mixing device 160.

It should be noted that, although not shown in fig. 1, the underwater respiration simulation apparatus provided in this embodiment further includes a temperature control system, and the temperature control system is used for controlling the temperature of the gas inside at least one of the oxygen consumption device 130 and the gas mixing device 160. Specifically, the temperature control system may be used only for controlling the temperature of the gas inside the oxygen consumption device 130, only for controlling the temperature of the gas inside the gas mixing device 160, and may be used for controlling both the temperature of the gas inside the oxygen consumption device 130 and the temperature of the gas inside the gas mixing device 160. The control of the temperature of the gas inside each device generally means that the gas inside the device is properly heated so that the corresponding gas reaches a temperature corresponding to the actual breathing temperature of the human body. The temperature control system controls the temperature of the gas in each device to be about 37 ℃, so that the temperature of the gas in the breathing process of a human body is better simulated.

It should be noted that, considering that the expansion and contraction with heat may affect the gas pumping device 120, and further affect the resistance received by the gas pumping device 120 during the operation, the temperature of the gas inside the gas pumping device 120 is not generally controlled (i.e., the temperature of the gas pumping device 120 is not raised).

In the underwater respiration simulation device provided in this embodiment, a gas pumping device 120 is further included, please refer to fig. 2, which shows a specific structure of the gas pumping device 120, and the gas pumping device 120 includes a cylinder 121 and a motor 122. The cylinder 121 has a cylinder 1211, a piston 1212, and a connecting rod 1213.

In this embodiment, the cylinder 121 is a cylindrical member guiding the inner piston 1212 thereof to reciprocate linearly within the cylinder 1211 thereof.

In this embodiment, the cylinder 1211 has a gas output 1215 and a gas input 1214. The gas output 1215 and gas input 1214 are located in the same end face of the cylinder 1211. Moreover, the gas input 1214 is connected to the corresponding gas source 100 (refer to fig. 1) to ensure that the cylinder 121 can draw gas from the gas source 100, so as to simulate the inhalation process of the human body. The gas output 1215 is connected to other devices (e.g., the oxygen consuming device 130) that follow and conducts all the way to the output of the entire underwater breathing simulation device, so that simulation of the exhalation process of the human body can be achieved by discharging gas to the gas output. It should be noted that in other embodiments, other gas input ports may be included on the same end face of the cylinder 1211.

In this embodiment, the inner diameter of the cylinder 1211 represents the magnitude of the output force of the cylinder 121. In order to smoothly reciprocate the piston 1212 inside the cylinder 1211, the surface roughness (Ra) of the inner surface of the cylinder 1211 should be 0.8 μm.

A piston 1212 is located within the cylinder 1211. The piston 1212 is a key element for pumping and exhausting gas in the cylinder 121, and in order to prevent the air leakage between the left and right chambers of the piston 1212, the piston 1212 may be provided with a sealing ring (not separately shown).

Connecting rod 1213 is connected at one end to piston 1212. The connecting rod 1213 is the most important stressed part in the cylinder 121. High carbon steel may be used, the surface of the connecting rod 1213 may be hard chrome plated, or stainless steel may be used for the connecting rod 1213 to prevent corrosion and improve wear resistance of the seal ring in the piston 1212.

The motor 122 is connected to the other end of the link 1213. Specifically, the motor 122 has a base 1224, and the base 1224 has a slide rail 1223. The motor 122 fixes the other end of the link 1213 by means of the screw 1221 and the clamp 1222, and the clamp 1222 is disposed on the slide 1223 to ensure the reciprocating movement of the clamp 1222 on the slide 1223. The motive power for the clamp 1222 may be derived from an electrical control system within the motor 122. The motor 122 can drive the connecting rod 1213 to reciprocate in a single axis, so that the connecting rod 1213 can drive the piston 1212 to reciprocate in a single axis in the cylinder 1211.

It should be noted that in other embodiments, the motor 122 may also be configured to fix the other end of the connecting rod 1213 and enable the connecting rod 1213 to move back and forth along a single axis.

In this embodiment, when the connecting rod 1213 is applied in a direction away from the gas output end and the gas input end, the piston 1212 is driven to draw the breathing gas into the cylinder 1211, thereby simulating the inhalation movement of the human body. When the connecting rod 1213 is applied in a direction close to the gas output end and the gas input end, the piston 1212 is driven to discharge the breathing gas out of the cylinder 1211, thereby simulating the exhalation movement of the human body.

In this embodiment, the displacement of the cylinder 121 is greater than or equal to the maximum vital capacity of the human body, so as to ensure that the gas pumping and exhausting device 120 can simulate breathing conditions of various degrees. The maximum lung capacity of the human body may refer to the maximum lung capacity of a normal adult, and considering that the present embodiment is applied to an underwater respiration simulation device, the maximum lung capacity of the human body may refer to the maximum lung capacity of a diver.

It should be noted that, although not shown, the gas pumping device 120 may further include a speed control system (the speed control system may be a part of the above-mentioned power control system, and there may be a corresponding control platform for inputting a corresponding set speed). The speed control system is used for controlling the movement speed of the connecting rod 1213 in a single-shaft reciprocating motion. In this embodiment, the speed control system may be disposed in the motor 122, so as to ensure that when the motor 122 drives the connecting rod 1213 to perform a single-axis reciprocating motion, the moving speed of the connecting rod 1213 can be controlled in real time, so as to control the moving speed of the piston 1212 in real time.

Although not shown, the gas pumping device 120 further comprises a resistance monitoring system. A resistance monitoring system (which may also be disposed within the respective housing 1224 and may have a corresponding display device or data output device to output corresponding resistance data) is provided for monitoring the resistance experienced by the piston 1212 as it moves within the cylinder 1211. The monitoring of the resistance force on the piston 1212 by the resistance force monitoring system is of great significance to the testing of the corresponding function of the scuba diving apparatus.

The gas pumping device provided by the embodiment has a simple structure, and can be used for full simulation of the inspiration and expiration processes of a human body through the mutual matching of the structures.

The present embodiment further provides a method for using the gas pumping device 120 shown in fig. 2, the method for using the gas pumping device 120 is suitable for the above gas pumping device 120, and the method for using the gas pumping device comprises: the motor 122 is used to control the connecting rod 1213 to make a single-shaft reciprocating motion, and the connecting rod 1213 drives the piston 1212 to make a reciprocating motion in the cylinder 1211. When the piston 1212 is moved away from the gas output port 1215 and the gas input port 1214, the gas input port 1214 is opened, the gas output port 1215 is closed, and the cylinder 121 draws a corresponding breathing gas from the gas input port 1214 into the bore 1211, simulating the breathing action of the human body. When the piston 1212 is moved in a direction towards the gas output port 1215 and the gas input port 1214, the gas input port 1214 is closed, the gas output port 1215 is opened, and the cylinder 121 displaces the breathing gas in the cylinder 1211 from the gas output port 1215 and out of the cylinder 1211, thereby simulating the exhalation movement of the human body.

In the use method, it is previously achieved that the displacement of the cylinder 121 is greater than or equal to the maximum lung capacity of the human body, and therefore, the volume of the respiratory gas drawn into the cylinder 1211 can be controlled by controlling the stroke of the piston 1212 in the cylinder 1211.

In this embodiment, the velocity of piston 1212 is controlled by a velocity control system. The velocity of piston 1212 may be used to simulate the breathing frequency and breathing intensity of a human. By means of the speed control system, the present embodiment can simulate different breathing intensities and breathing frequencies.

In this embodiment, the control piston 1212 is divided into two movement phases during one single movement, wherein the movement speed of the first movement phase is greater than the movement speed of the second movement phase. In the breathing process of a human body, no matter inspiration or expiration, the speed is firstly high and then the speed is secondly low (the strength used in breathing is firstly high and then small), so the movement speed of the first movement stage which is larger than the second movement stage is set, and the breathing action process of the human body can be simulated more accurately.

In this embodiment, the resistance monitoring system monitors the resistance experienced by the piston 1212 during movement. It has been mentioned above that monitoring of the resistance experienced by piston 1212 by the resistance monitoring system is of great significance in testing the respective function of the scuba. Resistance that piston 1212 receives in the motion process is monitored through resistance monitoring system, can gather each item index such as corresponding scuba's respiratory resistance to provide direct data for scuba's capability test.

In this embodiment, the piston 1212 is set to reciprocate at different speeds, and the resistance received by the piston 1212 during each reciprocating movement is monitored, so that various indexes of the corresponding scuba, such as corresponding breathing resistance under different breathing conditions, can be acquired, and the performance of the corresponding scuba can be more comprehensively known.

Through the process, the using method provided by the embodiment realizes full simulation of the inspiration and expiration processes of the human body, the whole process is simple and easy to operate, and meanwhile, the using method can realize simulation of various breathing intensities and breathing frequencies, so that conditions are provided for directly and comprehensively testing corresponding scuba diving devices.

It should be noted that, in order to ensure better operation of the air cylinder 121, it is preferable to maintain the air cylinder 121 in a constant temperature and humidity (low humidity or dry) state.

In the underwater respiration simulation apparatus provided by this embodiment, the underwater respiration simulation apparatus further includes a first oxygen consumption apparatus 130, please refer to fig. 3, in which the oxygen consumption apparatus 130 includes a plurality of oxygen consumption pipes 131 and a plurality of ventilation pipes 132. The gas input of each oxygen depletion tube 131 has a one-way valve 1311. The check valve 1311 is used to control the corresponding gas to flow into the oxygen consumption pipe 131 from the gas input end of the oxygen consumption pipe 131 in one direction. The gas output end of each oxygen consumption tube 131 is provided with an oxygen monitoring device 1312, and the oxygen monitoring device 1312 is used for monitoring the gas passing through the oxygen consumption tube 131 and outputting whether the gas output end still contains oxygen. If there is still oxidation, the oxygen consumption tube 131 cannot quantitatively remove oxygen.

In this embodiment, the oxygen consumption tube 131 has a liquid oxygen consumption agent or a solid oxygen consumption agent. The gas passing through the oxygen consumption tube 131 fully contacts with the liquid oxygen consumption agent or the solid oxygen consumption agent in the oxygen consumption tube 131, the oxygen in the gas is completely consumed by the chemical reaction of the liquid oxygen consumption agent or the solid oxygen consumption agent, and after the liquid oxygen consumption agent or the solid oxygen consumption agent used in the embodiment reacts with the oxygen, no other gas is generated, so that the quantitative control of the gas flow is facilitated.

In this embodiment, the gas input of each vent tube 132 has a one-way valve 1321. The gas input of the vent tube 132 is provided with a one-way valve 1321, again to ensure unidirectional flow of the respective gas from the vent tube 132.

In this embodiment, the number of the oxygen consumption tubes 131 is equal to that of the vent tubes 132, and the number is equal to 5. In other embodiments, the number of oxygen consumption tubes 131 and vent tubes 132 is equal, and is greater than 5. Quantitative control of the oxygen consumption ratio in the gas can be realized by controlling the opening and closing of the corresponding one-way valves (including the one-way valve 1311 and the one-way valve 1321) of each oxygen consumption tube 131 and the vent tube 132.

The oxygen consumption device 130 provided by the embodiment has a simple structure, and can achieve quantitative control of the oxygen consumption proportion in corresponding breathing gas simply by controlling the switching states of different one-way valves, thereby simplifying the simulation process of oxygen consumption.

The embodiment also provides a using method of the oxygen consumption device 130, which is applied to the oxygen consumption device 130. The using method comprises the following steps: the one-way valve 1311 at the gas input end of the at least one oxygen consumption tube 131 is opened, and the first part of the breathing gas flows through the opened oxygen consumption tube 131, so that the oxygen in the first part of the breathing gas is consumed, and the simulation of oxygen consumption of the part of the breathing gas by the human body is completed. The one-way valve 1321 at the gas input end of the at least one ventilation tube 132 is opened and a second portion of the breathing gas is allowed to flow through the opened ventilation tube 132, thereby completing the simulation of the human body that the oxygen is not consumed by the portion of the breathing gas.

In this embodiment, the first part of the breathing gas refers to a part of the breathing gas flowing into the whole oxygen consumption device 130, the part of the breathing gas is controlled to flow through the corresponding oxygen consumption tube 131, the second part of the breathing gas refers to another part of the breathing gas flowing into the whole oxygen consumption device 130, the part of the breathing gas is controlled to flow through the corresponding ventilation tube 132, and the sum of the first part of the breathing gas and the second part of the breathing gas is equal to the whole breathing gas flowing through the whole oxygen consumption device 130.

In this embodiment, one oxygen consumption tube 131 and one ventilation tube 132 pass the same volume of breathing gas at the same time. Thereby facilitating quantitative control of the gas ratio through the oxygen consumption tube 131 and the ventilation tube 132.

In this embodiment, the number of the oxygen consumption tubes 131 and the number of the ventilation tubes 132 are equal to or greater than 5, and the volume ratio of the first part of respiratory gas to the second part of respiratory gas is controlled by controlling the number of the oxygen consumption tubes 131 and the number of the ventilation tubes 132. And controlling the volume ratio of the first partial respiratory gas to the second partial respiratory gas allows quantitative control of the amount of oxygen consumed in the total respiratory gas.

Specifically, when the number of oxygen consumption tubes 131 and the number of ventilation tubes 132 are both 5, if one oxygen consumption tube 131 and one ventilation tube 132 are opened simultaneously, the volume ratio of the first part of respiratory gas to the second part of respiratory gas is 1:1, and at this time, half of the oxygen in the respiratory gas is completely consumed, so that it can be known that the oxygen consumption is 50%. When the number of the oxygen consumption tubes 131 and the ventilation tubes 132 is 5, if three oxygen consumption tubes 131 and one ventilation tube 132 are opened simultaneously, the volume ratio of the first partial respiratory gas to the second partial respiratory gas is 3:1, and at this time, three quarters of the respiratory gas is completely consumed by oxygen, and thus, it is known that the consumption amount of oxygen is 75%. When the number of the oxygen consumption tubes 131 and the ventilation tubes 132 is 5, if one oxygen consumption tube 131 and three ventilation tubes 132 are opened simultaneously, the volume ratio of the first part of the respiratory gas to the second part of the respiratory gas is 1:3, and at this time, one quarter of the respiratory gas is completely consumed, so that it is known that the oxygen consumption is 25%.

In this embodiment, when the oxygen monitoring device 1312 monitors that the output gas of the corresponding oxygen consumption tube 131 contains oxygen, the oxygen consuming agent in the corresponding oxygen consumption tube 131 is replaced. Thereby ensuring that the oxygen consumption can be quantitatively controlled in real time.

In the underwater respiration simulation apparatus provided by this embodiment, a second oxygen consumption apparatus 130 is further included, please refer to fig. 4, in which the oxygen consumption apparatus 130 includes an oxygen consumption pool 133 and a ventilation pipe 134.

In this embodiment, the gas input end of the oxygen consuming cell 133 is provided with a flow control valve 1331, and the flow control valve 1331 not only ensures that the corresponding gas flows unidirectionally from the oxygen consuming cell 133, but also can control the flow rate of the corresponding gas in the oxygen consuming cell 133 per unit time (i.e., control the flow rate of the corresponding gas).

In this embodiment, the oxygen consuming tank 133 has a liquid oxygen consuming agent or a solid oxygen consuming agent. The gas passing through the oxygen consumption tube fully contacts with the liquid oxygen consumption agent or the solid oxygen consumption agent in the oxygen consumption pool 133, the oxygen in the gas is completely consumed by the chemical reaction of the liquid oxygen consumption agent or the solid oxygen consumption agent, and after the liquid oxygen consumption agent or the solid oxygen consumption agent used in the embodiment reacts with the oxygen, no other gas is generated, so that the quantitative control of the gas flow is facilitated.

In this embodiment, the gas output end of the oxygen consuming cell 133 is provided with an oxygen monitoring device 1332, and when the oxygen monitoring device 1332 detects that the gas output end of the oxygen consuming cell 133 contains oxygen, the corresponding oxygen consuming agent in the oxygen consuming cell 133 is replaced. Thereby ensuring that the oxygen consumption can be quantitatively controlled in real time.

In this embodiment, the gas input of the vent tube 134 has a flow control valve 1341. The flow control valve 1341 not only ensures a one-way flow of the corresponding gas from the vent pipe 134, but also controls the flow rate of the corresponding gas in the vent pipe 134 per unit time (i.e., controls the flow rate of the corresponding gas).

In this embodiment, the gas output end of the oxygen consuming cell 133 is further provided with a check valve 1333, and by providing the check valve 1333 at the gas output end of the oxygen consuming cell 133, the gas output from the vent pipe 134 is prevented from reversely entering the oxygen consuming cell 133 from the output end of the oxygen consuming cell 133, so that the gas output from the vent pipe 134 is prevented from adversely affecting the normal use of the oxygen consuming cell 133.

The present embodiment also provides a method of use corresponding to the oxygen consumption device 130 shown in fig. 4, the method of use comprising: the first flow control valve is controlled to at least partially open and a first portion of the breathing gas is caused to flow through the oxygen depletion reservoir 133, thereby depleting oxygen in the first portion of the breathing gas and completing a simulation of oxygen depletion of the portion of the breathing gas by the human body. The second flow control valve is controlled to at least partially open and a second portion of the breathing gas is allowed to flow through the opened ventilation tube 134 to complete the simulation of the body's lack of oxygen consumption for a portion of the breathing gas.

In this embodiment, the volume ratio of the first portion of breathing gas and the second portion of breathing gas is controlled by the first flow control valve and the second flow control valve. For example, the volume ratio of the first portion of breathing gas to the second portion of breathing gas may be controlled by the first flow control valve and the second flow control valve to be 1:1, 1:2, 1:3, 2:1, or 3:1, etc.

In this embodiment, when the oxygen monitoring device 1332 detects that the output gas from the gas output end of the oxygen consuming cell 133 contains oxygen, the oxygen consuming agent in the oxygen consuming cell 133 is replaced.

It should be noted that, in addition to the gas pumping device 120 provided in fig. 2, the underwater respiration simulation apparatus provided in this embodiment may also use other gas pumping devices 120 to simulate the inhalation and exhalation actions of the human body, and in addition to the oxygen consumption device 130 shown in fig. 3 and 4, the underwater respiration simulation apparatus provided in this embodiment may also use other oxygen consumption devices 130 to simulate the consumption of oxygen by the human body.

In the underwater breathing simulation device provided by the embodiment, the gas pumping device 120 is used for pumping in the breathing gas from the gas source 100 and exhausting the breathing gas to simulate the breathing action and the breathing action of a human body, and the oxygen consumption device 130 is used for consuming at least part of oxygen in the breathing gas to simulate the consumption of oxygen by the human body. Thereby saving the testing cost and putting an end to the potential safety hazard of personnel. Simultaneously, because needn't just can test scuba through the true dive of diver, can also improve scuba's the convenient performance of test.

It should be noted that the underwater breathing simulation device can be used in combination with an open-type scuba, a semi-closed type scuba, or a closed-type scuba. The underwater breathing simulation device can be matched with various types of scuba diving devices for use, so that the underwater breathing simulation device can be used for testing various performances of the different types of scuba diving devices.

The embodiment of the invention also provides an underwater respiration simulation method of the underwater respiration simulation device, and the underwater respiration simulation method is suitable for the underwater respiration simulation device provided by the embodiment, so that the underwater respiration simulation device can refer to the corresponding content of the embodiment.

The underwater respiration simulation method comprises the following steps: the total gas input of the underwater breathing simulation apparatus (in the present embodiment, the total gas input is the gas input of the gas pumping device 120) is connected to the gas source 100, and then the gas pumping device 120 is used to pump the breathing gas from the gas source 100 into the underwater breathing simulation apparatus (the arrow between the gas source 100 and the pressure chamber 110 in fig. 1 represents the pumping direction of the breathing gas), and to pump the breathing gas from the gas pumping device 120 to the oxygen consumption device 130, so as to simulate the breathing and exhalation actions of the human body. At least a portion of the oxygen in the breathing gas is consumed using the oxygen consumption device 130 to simulate the consumption of oxygen by a human body. The breathing gas is passed through the oxygen consuming device 130 and is further discharged to the gas mixing device 160. At the same time, carbon dioxide is supplemented to the gas mixing device 160 using the carbon dioxide supplementing device 140 to supplement carbon dioxide to the breathing gas that has passed through the oxygen consuming device 130 to simulate the production of carbon dioxide by a human body. At the same time, the humidifying device 150 is used to replenish the gas mixing device 160 with water vapor to add humidity to the breathing gas that has passed through the oxygen-consuming device 130 to simulate the humidity of the exhaled gas of a human body. The breathing gas that has passed through the oxygen consuming device 130 is mixed with make-up carbon dioxide and water vapor by the gas mixing device 160. The mixed breathing gas is finally discharged through the gas outlet of the gas mixing device 160 (the arrow in fig. 1 at the gas outlet of the gas mixing device 160 represents the discharge direction of the breathing gas).

In this embodiment, the pressure of the breathing gas is reduced by means of the first and second

pressure reducing valves

171, 172, so that the pressure of the breathing gas reaches a level substantially equal to the pressure in the pressure chamber 100 before entering the gas evacuation device 120.

In this embodiment, the one-way flow of the breathing gas from the second pressure reducing valve 172 to the gas pumping device 120 is controlled by providing the first one-way valve 101 between the second pressure reducing valve 172 and the gas pumping device 120, and the one-way flow of the breathing gas from the gas pumping device 120 to the oxygen consuming device 130 is controlled by providing the second one-way valve 102 between the gas pumping device 120 and the oxygen consuming device 130.

By providing a third one-way valve 103 between the oxygen consuming device 130 and the gas mixing device 160, the one-way flow of breathing gas from the oxygen consuming device 130 to the gas mixing device 160 is controlled. By providing the fourth check valve 104 between the carbon dioxide replenishing device 140 and the gas mixing device 160, the unidirectional flow of carbon dioxide generated by the carbon dioxide replenishing device 140 to the gas mixing device 160 is controlled. The fifth one-way valve 105 is arranged between the humidifying device 150 and the gas mixing device 160 to control the water vapor supplemented by the humidifying device 150 to flow to the gas mixing device 160 in a one-way mode, and the sixth one-way valve 106 is arranged at the gas output end of the gas mixing device 160 to control the mixed gas to be output from the gas mixing device 160 in a one-way mode.

In this embodiment, when the gas evacuation device 120 draws in breathing gas from the gas source 100, the first one-way valve 101 is opened and the second 102, third 103, fourth 104, fifth 105 and sixth 106 one-way valves are closed, and breathing gas is drawn into the gas evacuation device 120. When the breathing gas is exhausted from the gas pumping device 120, the first one-way valve 101 is closed, the second one-way valve 102, the third one-way valve 103, the fourth one-way valve 104, the fifth one-way valve 105 and the sixth one-way valve 106 are opened, the breathing gas is exhausted from the gas pumping device 120 and exhausted to the oxygen consuming device 130, after passing through the oxygen consuming device 130, the breathing gas is exhausted to the gas mixing device 160, at the same time, the carbon dioxide supplementing device 140 supplements carbon dioxide to the gas mixing device 160, the humidifying device 150 supplements water vapor to the gas mixing device 160, so that the gas components in the gas mixing device 160 are mixed uniformly, and the breathing gas which is originally positioned in the gas mixing device 160 and mixed uniformly is exhausted from the gas mixing device 160 through the opened sixth one-way valve 106 to the outside of the pressure chamber 110.

After the linkage control of the check valves, the simulation of the inspiration and expiration processes in the whole human breathing process is realized, the simulation of the inspiration and expiration processes also comprises the simulation of an oxygen consumption process and a carbon dioxide generation process, and the simulation of the humidity level of the expired gas is also performed. In addition, the temperature of the respiratory system can be adjusted by using a corresponding temperature control system so as to simulate the temperature of the exhaled air of the human body.

The respiratory quotient is the ratio of the volume or the mole number of carbon dioxide released and oxygen absorbed by the organism at the same time, namely the molecular ratio of the carbon dioxide released and the oxygen absorbed by respiration. In this embodiment, the simulated respiratory quotient of the underwater respiration simulation device can be controlled to be 0.855 to 0.860, or 0.860 to 0.875, or 0.875 to 0.900, or 0.900 to 0.910 by adjusting the amount (amount) of oxygen consumed by the oxygen consumption device 130 and the amount (amount) of carbon dioxide supplemented by the carbon dioxide supplementing device 140. Under the three different breathing quotient conditions, the underwater breathing simulation device is used for respectively simulating the breathing conditions of a human body in the processes of mild activity (breathing quotient of 0.855-0.860), sleep (breathing quotient of 0.860-0.875), moderate activity (breathing quotient of 0.875-0.900) and severe activity (breathing quotient of 0.900-0.910), so that the breathing simulation method can be adopted for testing the diving respirator under various breathing conditions.

It should be noted that, although not shown in fig. 1, it can be understood from the foregoing that the method for simulating underwater respiration provided by the present embodiment can control the temperature of the gas inside at least one of the oxygen consumption device 130 and the gas mixing device 160 through the temperature control system.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation apparatus without the gas mixing device 160, and in this case, the steps of providing the third check valve 103 and opening and closing the third check valve 103 are not required correspondingly. At this time, the carbon dioxide and the water vapor respectively supplemented by the carbon dioxide supplementing device 140 and the humidifying device 150 may be directly input to the same pipeline to be mixed. Of course, if the gas mixing device 160 is added to make the gas mixture more uniform, the breathing of the human body can be better simulated.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation device without the carbon dioxide supplement device 140, and in this case, the steps of providing the fourth check valve 104 and opening and closing the fourth check valve 104 are not required correspondingly. Of course, if the carbon dioxide supplement device 140 is added, the exhaled gas in the human breathing process can be better simulated.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation device without the humidifying device 150, and in this case, the steps of providing the fifth check valve 105 and opening and closing the fifth check valve 105 are not required correspondingly. Of course, if the humidifying device 150 is added, the humidity of the exhaled air in the process of breathing of the human body can be better simulated.

The underwater respiration simulation method can control the pressure intensity range in the pressure cabin 110 to be 4 MPa-5 MPa.

The underwater respiration simulation method provided by the embodiment can utilize the underwater respiration simulation device to realize simulation of the corresponding respiration process of a diver during real diving, and the simulation process is simple, so that the test time is saved, and the test efficiency is improved.

It should be noted that the underwater breathing simulation method can be used with an open-type scuba, a semi-closed type scuba, or a closed-type scuba. The underwater breathing simulation method can be used for testing various performances of different types of scuba diving devices because the breathing simulation method can be used together with the different types of scuba diving devices.

The embodiment of the invention also provides a breathing resistance testing method of the diving respirator, which comprises the steps of one to four.

Step one, providing an underwater breathing simulation device and a diving respirator. The underwater respiration simulation device is shown in fig. 1, and specifically comprises a pressure chamber 110, a gas pumping device 120 and an oxygen consumption device 130. The gas pumping device 120 and the oxygen-consuming device 130 are located inside the pressure chamber 110. The gas input of the gas pumping device 120 is connected to the gas source 100, and the gas output of the gas pumping device 120 is connected to the gas input of the oxygen consumption device 130. The underwater breathing simulation device further comprises a carbon dioxide supplement device 140 positioned in the pressure chamber 110 and a humidifying device 150 positioned in the pressure chamber 110, and the contents of more underwater breathing simulation devices can be referred to the contents of the above description.

And step two, assembling the underwater breathing simulation device and the diving respirator together.

In this embodiment, the underwater breathing simulation device and the diving respirator are assembled in a manner equivalent to that after the diving respirator is worn by a human body, for example, an air mouthpiece of the diving respirator is connected to a gas input end of the underwater breathing simulation device, specifically, the gas input end is a gas input end of the gas pumping device 120, which can be referred to fig. 1. In other words, in this embodiment, the gas input of the gas pumping device 120 is connected to the gas source 100, and the gas source 100 is a part of the scuba diving apparatus. The gas source 100 may in particular be a gas cylinder in the described scuba.

And step three, pressurizing the pressure chamber 110 to reach an underwater pressure environment when the scuba is used.

In this embodiment, the pressure chamber 110 is pressurized, and specifically, the pressure of the pressure chamber 110 can reach 4MPa to 5MPa, so as to simulate a corresponding diving pressure environment.

And step four, simulating the human body respiration by using an underwater respiration simulating device, and testing the resistance of the gas pumping and exhausting device 120 in the underwater respiration simulating device in the gas pumping and exhausting process.

In this embodiment, the resistance of the gas pumping device 120 during pumping gas is the breathing resistance of the scuba.

In this embodiment, simulating human breathing using the underwater breathing simulation apparatus includes: the gas pumping device 120 is used to simulate the inhalation and exhalation of breathing gas by a human body. The specific simulation process can refer to the gas pumping device 120 and the method of using the same corresponding to fig. 2.

It should be noted that, as described above, the movement speed of the piston 1212 in the gas pumping device 120 (shown in fig. 2) can be controlled, so as to simulate different breathing intensities and different breathing frequencies, and further, to test the breathing resistance of the scuba diving under the conditions of different breathing intensities and different breathing frequencies. That is, the present embodiment can test the resistance of the gas pumping device 120 during the gas pumping process under different working conditions of the gas pumping device 120, that is, can simulate and test the breathing resistance of the scuba diving under different breathing conditions of the human body.

In this embodiment, simulating human breathing using the underwater breathing simulation apparatus includes: the consumption of oxygen in the breathing gas by the human body is simulated using the oxygen consumption device 130. Specific simulation processes can refer to the oxygen consumption device 130 and the use method thereof corresponding to fig. 3 and 4.

In this embodiment, because the carbon dioxide supplement device 140 is present, the resistance of the gas pumping device 120 during the gas pumping process before the carbon dioxide supplement device 140 supplements the carbon dioxide is tested, and the resistance of the gas pumping device 120 during the gas pumping process after the carbon dioxide supplement device 140 supplements the carbon dioxide is tested. In other embodiments, when carbon dioxide supplemental device 140 is not present, the effect of carbon dioxide supplemental device 140 on the corresponding resistance may not be considered. That is, the present embodiment can test the resistance of the gas pumping device 120 during pumping gas under different working conditions of the oxygen consuming device 130 and the carbon dioxide supplementing device 140. To accurately test the breathing resistance of a scuba, the effect of carbon dioxide supplement 140 on the resistance can be repeatedly tested to more accurately measure the resistance.

It should be noted that, as mentioned above, the control of the breathing quotient can be achieved by controlling the amount of oxygen consumed by the oxygen consumption device 130 in the breathing gas and controlling the amount of carbon dioxide supplemented by the carbon dioxide supplementing device 140. Therefore, the breathing resistance of the diving respirator can be tested under different breathing quotient conditions by adjusting and controlling the two devices.

In this embodiment, because of the existence of the humidification device 150, the resistance of the gas pumping device 120 during the gas pumping process is tested before the humidification device 150 performs humidification, and the resistance of the gas pumping device 120 during the gas pumping process is tested after the humidification device 150 performs humidification. In other embodiments, when the humidifying device 150 is not present, the effect of the humidifying device 150 on the corresponding resistance may not be considered. To accurately test the breathing resistance of a scuba, the effect of humidifying device 150 on the resistance can be repeatedly tested to more accurately measure the resistance.

The breathing resistance of the diving respirator can be tested quickly and accurately by adopting the testing method, and the problem of personnel safety is avoided.

Another embodiment of the invention provides another underwater breathing simulation device.

Referring to fig. 5, the underwater respiration simulation apparatus includes a pressure chamber 210, an oxygen consumption device 220, a gas pumping device 230, a carbon dioxide supplement device 240, a humidifying device 250, and a gas mixing device 260.

In this embodiment, the pressure chamber 210 may be a closed chamber body, so that the pressure inside the pressure chamber 210 can be raised by introducing gas or the like. However, there may be some venting lines in the pressure chamber 210 that communicate with the outside, such as in fig. 5, the venting lines between the gas evacuation device 230 and the gas source 200 pass from the inside of the pressure chamber 210 through the pressure chamber 210 to the outside of the pressure chamber 200. Likewise, the gas output of the gas mixing device 260 corresponds to a vent line from the interior of the pressure chamber 210, through the pressure chamber 210, and out of the chamber.

In this embodiment, the pressure range in the pressure chamber 210 may be set to 4MPa to 5MPa according to the underwater pressure environment to be simulated, so as to simulate the real diving pressure condition.

In this embodiment, the oxygen consumption device 220 is located in the pressure chamber 210 and is configured to consume at least a portion of the oxygen in the breathing gas to simulate the consumption of oxygen by a human body. Since the person does not consume all of the oxygen in the inhaled gas, the oxygen consumption device 220 usually does not consume all of the oxygen in the breathing gas, but a part of the oxygen remains in the breathing gas discharged by the underwater breathing simulation device.

In this embodiment, the gas evacuation device 230 is located within the pressure chamber 210 for drawing in breathing gas from the gas source 200 (in this embodiment, breathing gas passes through the oxygen depletion device 220 before being drawn from the gas source 200 into the gas evacuation device 230) and for exhausting the breathing gas to simulate the inspiratory and expiratory actions of a human being. By drawing in breathing gas from the gas source 200, it is meant that the gas pumping device 230 draws breathing gas originally stored in the gas cylinder (in this case, the gas source 200 is the gas cylinder storing breathing gas) into the whole underwater breathing simulation device by the pumping action of the gas pumping device 230 (this process includes drawing breathing gas into the gas pumping device 230). The exhausting of the breathing gas means that the gas pumping device 230 exhausts the gas processed by the whole underwater breathing simulation device out of the underwater breathing simulation device (the process includes exhausting the breathing gas from the inside of the gas pumping device 230), and the flow power of the breathing gas mainly comes from the fact that the gas pumping device 230 exhausts the breathing gas in the inside of the gas pumping device, so that the gas output end of the whole underwater breathing simulation device exhausts the breathing gas with a corresponding volume.

In this embodiment, a carbon dioxide supplementing device 240 is located within the pressure chamber 210 for supplementing carbon dioxide to the breathing gas that has passed through the oxygen consuming device 220 to simulate the production of carbon dioxide by a human body.

In this embodiment, the oxygen consumption device 220 is used to simulate the process of oxygen consumption by a human body, and the carbon dioxide supplement device 240 is used to simulate the process of carbon dioxide production by a human body, so that the two processes are completely separated, quantitative control of oxygen consumption and carbon dioxide production is facilitated, and the carbon dioxide supplement device 240 can be omitted under certain conditions, thereby simplifying the structure. That is, the present embodiment separates the human body from the gas exchange process of consuming oxygen and forming carbon dioxide into two processes for treatment.

In this embodiment, a humidifying device 250 is located within the pressure chamber 210 for humidifying the breathing gas to simulate the humidity of the exhaled air of a human body. The humidifying device 250 may be a device that generates moisture, and the humidifying device may humidify the corresponding breathing gas to the humidity level of the exhaled gas of the human body as needed.

In this embodiment, a gas mixing device 260 is located within the pressure chamber 210 for mixing the breathing gas passing through the oxygen-consuming device 220 with supplemental carbon dioxide (provided by the carbon dioxide supplemental device 240) and water vapor (provided by the humidifying device 250).

With continued reference to fig. 5, the gas input of the oxygen consumption device 220 is connected to the gas source 200, and the gas output of the oxygen consumption device 220 is connected to the first gas input of the gas pumping device 230 (in this embodiment, the gas pumping device 230 has only one gas input, i.e. the first gas input).

In this embodiment, the air source 200 is located outside the pressure chamber 210 of the underwater breathing simulation device. The gas source 200 may be a cylinder containing liquid air. The pressure of the gas in the gas cylinder can be 30MPa to 40 MPa. In other embodiments, the gas source 200 may be located within the pressure chamber 210.

With continued reference to fig. 5, a first gas input end of the gas mixing device 260 is connected to the gas output end of the gas pumping device 230, a second gas input end of the gas mixing device 260 is connected to the gas output end of the carbon dioxide supplementing device 240, and a third gas input end of the gas mixing device 260 is connected to the output end of the humidifying device 250.

In this embodiment, the gas mixing device 260 has three gas inputs, and the gas output of the gas pumping device 230, the gas output of the carbon dioxide supplementing device 240 and the output of the humidifying device 250 are respectively. In other embodiments, the gas mixing device 260 may have more than four gas input ports, as long as each of the output ports is connected to the input port of the gas mixing device 260. In other embodiments, when the carbon dioxide supplement unit 240 is not provided, the gas mixing unit 260 may correspondingly eliminate the gas input corresponding to the carbon dioxide supplement unit 240, and therefore, the gas mixing unit 260 may have only two gas inputs.

In this embodiment, the gas mixing device 260 may have a gas mixing turbine (not shown) therein, and the different components input into the gas mixing device 260 are sufficiently mixed by the rotation of the turbine.

With continued reference to fig. 5, a first pressure reducing valve 271 and a second pressure reducing valve 272 are provided between the gas source 200 and the oxygen consumption device 220, the first pressure reducing valve 271 and the second pressure reducing valve 272 are located in the pressure chamber 210, and the second pressure reducing valve 272 is located between the first pressure reducing valve 271 and the gas pumping device 230.

In this embodiment, the breathing gas in the gas source 200 can be reduced from a pressure range of 30MPa to 40MPa to a pressure substantially equal to the ambient pressure in the pressure chamber 210 by the pressure reduction action of the first pressure reducing valve 271 and the second pressure reducing valve 272, or the pressure range of the breathing gas can be reduced to a pressure slightly higher than the ambient pressure in the pressure chamber 210 (the ambient pressure is the pressure in the pressure chamber 200) after the pressure reduction action of the first pressure reducing valve 271 and the second pressure reducing valve 272, for example, about 0kPa to 500kPa higher than the ambient pressure. Wherein the first pressure reducing valve 271 can reduce the pressure of 30MPa to 40MPa to about 10 MPa.

In the embodiment, the first pressure reducing valve 271 and the second pressure reducing valve 272 are arranged in the pressure chamber 210, so that the first pressure reducing valve 271 and the second pressure reducing valve 272 can work in a pressure environment closer to real diving, and the simulation level of the whole underwater breathing simulation device is improved.

In the present embodiment, the first pressure reducing valve 271 and the second pressure reducing valve 272 are part of the whole underwater breathing simulation apparatus, but in other embodiments, the underwater breathing simulation apparatus may not include the first pressure reducing valve 271 and the second pressure reducing valve 272, and the first pressure reducing valve 271 and the second pressure reducing valve 272 may be part of the corresponding scuba.

With continued reference to fig. 5, a first check valve 201 is disposed between the second pressure reducing valve 272 and the gas pumping device 230, and a second check valve 202 is disposed between the oxygen consumption device 220 and the gas pumping device 230.

In this embodiment, the first one-way valve 201 is used to control the one-way flow of the respective breathing gas from the second pressure reducing valve 272 to the oxygen consumer 220. The second one-way valve 202 is used to control the one-way flow of the respective breathing gas from the oxygen consuming device 220 to the gas pumping device 230.

With continued reference to fig. 5, a third check valve 203 is disposed between the gas pumping device 230 and the gas mixing device 260, a fourth check valve 204 is disposed between the carbon dioxide supplementing device 240 and the gas mixing device 260, a fifth check valve 205 is disposed between the humidifying device 250 and the gas mixing device 260, and a sixth check valve 206 is disposed at the gas output end of the humidifying device 250.

In this embodiment, the unidirectional flow of breathing gas from the gas pumping device 230 to the gas mixing device 260 is controlled by the third one-way valve 203. The fourth check valve 204 controls the carbon dioxide generated from the carbon dioxide supplement device 240 to flow in one direction to the gas mixing device 260. The fifth check valve 205 controls the moisture supplemented by the humidifying device 250 to flow to the gas mixing device 260 in one direction, and the sixth check valve 206 controls the mixed gas to be output from the gas mixing device 260 in one direction.

It should be noted that, although not shown in fig. 5, the underwater respiration simulation apparatus provided in this embodiment further includes a temperature control system, and the temperature control system is used for controlling the temperature of the gas inside at least one of the gas pumping device 230 and the gas mixing device 260. Specifically, the temperature control system may be only used to control the temperature of the gas inside the gas pumping device 230, may also be only used to control the temperature of the gas inside the gas mixing device 260, and may also be used to control the temperature of the gas inside the gas pumping device 230 and the temperature of the gas inside the gas mixing device 260 at the same time. The control of the temperature of the gas inside each device generally means that the gas inside the device is properly heated so that the corresponding gas reaches a temperature corresponding to the actual breathing temperature of the human body. The temperature control system controls the temperature of the gas in each device to be about 37 ℃, so that the temperature of the gas in the breathing process of a human body is better simulated.

It should be noted that, considering that expansion with heat and contraction with cold may affect the gas pumping device 230, and further affect the resistance received by the gas pumping device 230 during operation, the temperature of the gas inside the gas pumping device 230 is generally controlled to be constant temperature.

In the underwater respiration simulation apparatus provided in this embodiment, reference may be made to fig. 2 and its corresponding contents in the detailed structure and the corresponding using method of the gas pumping device 230. In the underwater respiration simulation device provided in this embodiment, the detailed structure and the corresponding using method of the oxygen consumption device 220 can refer to fig. 3 and 4 and the corresponding contents of the corresponding embodiments thereof. It should be noted that, in addition to the gas pumping device provided in fig. 2, the underwater respiration simulation apparatus provided in this embodiment may also use other gas pumping devices to simulate the inhalation and exhalation actions of the human body, and in addition to the oxygen consumption device shown in fig. 3 and 4, the underwater respiration simulation apparatus provided in this embodiment may also use other oxygen consumption devices to simulate the consumption of oxygen by the human body.

In the underwater respiration simulation apparatus provided by the present embodiment, the gas pumping device 230 is used to pump the breathing gas from the gas source 200, and the pumped gas passes through the oxygen consumption device 220 to consume at least part of the oxygen in the breathing gas to simulate the consumption of oxygen by the human body, and then the breathing gas is further pumped from the oxygen consumption device 220 into the gas pumping device 230 and is subsequently exhausted by the gas pumping device 230 to simulate the inhalation and exhalation actions of the human body. That is to say, this embodiment adopts the simulation of the breathing process when the cooperation of two devices can realize the true dive of diver, consequently, breathe analogue means under water can be used for testing scuba to needn't be through the true dive of diver just can test scuba's each item performance, for example can test scuba's respiratory resistance. Thereby saving the testing cost and putting an end to the potential safety hazard of personnel. Simultaneously, because needn't just can test scuba through the true dive of diver, can also improve scuba's the convenient performance of test.

Another embodiment of the present invention further provides another underwater respiration simulation method for an underwater respiration simulation apparatus, which is suitable for the underwater respiration simulation apparatus provided in the foregoing embodiment, and therefore, the underwater respiration simulation apparatus may refer to the corresponding contents of the foregoing embodiment.

The underwater respiration simulation method comprises the following steps: the total gas input end of the underwater respiration simulation device (in the embodiment, the total gas input end is the gas input end of the oxygen consumption device 220) is connected to the gas source 200, and then the breathing gas is pumped into the underwater respiration simulation device from the gas source 200 by using the gas pumping device 230 (the arrow between the gas source 200 and the pressure chamber 210 in fig. 5 represents the pumping direction of the breathing gas), at this time, the breathing gas firstly enters the oxygen consumption device 220, and the oxygen consumption device 220 consumes at least part of the oxygen in the breathing gas so as to simulate the consumption of oxygen by a human body. Thereafter, the breathing gas continues to be drawn into the gas evacuation device 230. The breathing gas is then exhausted from the gas evacuation device 230 to simulate the inspiratory and expiratory actions of a human body. After being exhausted by the gas pumping device 230, the respiratory gas is continuously exhausted into the gas mixing device 260. At the same time, the carbon dioxide supplementing device 240 is used to supplement the gas mixing device 260 with carbon dioxide, thereby supplementing the breathing gas that has passed through the oxygen consuming device 220 with carbon dioxide to simulate the production of carbon dioxide by a human body. At the same time, the humidifying device 250 is used to replenish the gas mixing device 260 with water vapor, thereby adding humidity to the breathing gas that has passed through the oxygen-consuming device 220 to simulate the humidity of the exhaled gas of a human body. The breathing gas that has passed through the oxygen consuming device 220 is mixed with supplemental carbon dioxide and water vapor by the gas mixing device 260. The mixed breathing gas is finally discharged through the gas outlet of the gas mixing device 260 (the arrow in fig. 5 at the gas outlet of the gas mixing device 260 represents the discharge direction of the breathing gas).

In this embodiment, the pressure of the breathing gas is reduced by means of a first pressure reducing valve 271 and a second pressure reducing valve 272, such that the pressure of the breathing gas reaches a level substantially equal to the pressure in the pressure compartment 200 before entering the oxygen-consuming device 220.

In this embodiment, the one-way flow of the breathing gas from the second pressure reducing valve 272 to the oxygen consuming device 220 is controlled by providing the first one-way valve 201 between the second pressure reducing valve 272 and the oxygen consuming device 220, and the one-way flow of the breathing gas from the oxygen consuming device 220 to the gas pumping device 230 is controlled by providing the second one-way valve 202 between the oxygen consuming device 220 and the gas pumping device 230.

In this embodiment, the unidirectional flow of breathing gas from the gas pumping device 230 to the gas mixing device 260 is controlled by providing a third one-way valve 203 between the gas pumping device 230 and the gas mixing device 260. By providing the fourth check valve 204 between the carbon dioxide replenishing device 240 and the gas mixing device 260, the unidirectional flow of carbon dioxide generated by the carbon dioxide replenishing device 240 to the gas mixing device 260 is controlled. The fifth one-way valve 205 is arranged between the humidifying device 250 and the gas mixing device 260, so that the water vapor supplemented by the humidifying device 250 is controlled to flow to the gas mixing device 260 in a one-way mode, and the sixth one-way valve 206 is arranged at the gas output end of the gas mixing device 260, so that the mixed gas is controlled to be output from the gas mixing device 260 in a one-way mode.

In this embodiment, when the gas pumping device 230 is pumping in breathing gas from the gas source 200, the first one-way valve 201 and the second one-way valve 202 are opened, and the third one-way valve 203, the fourth one-way valve 204, the fifth one-way valve 205 and the sixth one-way valve 206 are closed, the breathing gas is pumped into the oxygen consumption device 220 first, and after passing through the oxygen consumption device 220, is continuously pumped into the gas pumping device 230. When the gas pumping device 230 exhausts the breathing gas, the first one-way valve 201 and the second one-way valve 202 are closed, the third one-way valve 203, the fourth one-way valve 204, the fifth one-way valve 205 and the sixth one-way valve 206 are opened, and at the same time, the breathing gas is exhausted from the gas pumping device 230 and exhausted to the gas mixing device 260, and meanwhile, the carbon dioxide supplementing device 240 supplements carbon dioxide to the gas mixing device 260, and the humidifying device 250 supplements water vapor to the gas mixing device 260, so that the gas components in the gas mixing device 260 are uniformly mixed, and the breathing gas which is originally positioned in the gas mixing device 260 and is uniformly mixed is exhausted from the gas mixing device 260 through the opened sixth one-way valve 206 and exhausted out of the pressure chamber 210 when other parts of the gas are input.

In this embodiment, the simulated respiratory quotient of the underwater respiration simulation device can be controlled to be 0.855 to 0.860, or 0.860 to 0.875, or 0.875 to 0.900, or 0.900 to 0.910 by adjusting the amount (amount) of oxygen consumed by the oxygen consumption device 220 and the amount (amount) of carbon dioxide supplemented by the carbon dioxide supplementing device 240. Under the three different breathing quotient conditions, the underwater breathing simulation device is used for respectively simulating the breathing conditions of a human body in the processes of mild activity (breathing quotient of 0.855-0.860), sleep (breathing quotient of 0.860-0.875), moderate activity (breathing quotient of 0.875-0.900) and severe activity (breathing quotient of 0.900-0.910), so that the breathing simulation method can be adopted for testing the diving respirator under various breathing conditions.

It should be noted that, although not shown in fig. 5, it can be known from the foregoing that the underwater respiration simulation method provided by the embodiment can control the temperature of the gas inside at least one of the oxygen consumption device 220 and the gas mixing device 260 through the temperature control system.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation apparatus without the gas mixing device 260, and in this case, the steps of providing the third check valve 203 and opening and closing the third check valve 203 are not required correspondingly. At this time, the carbon dioxide and the water vapor respectively supplemented by the carbon dioxide supplementing device 240 and the humidifying device 250 may be directly input to the same pipeline to be mixed. Of course, if the gas mixing device 260 is added to make the gas mixture more uniform, the breathing of the human body can be better simulated.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation device without the carbon dioxide supplement device 240, and in this case, the steps of providing the fourth check valve 204 and opening and closing the fourth check valve 204 are not required correspondingly. Of course, if the carbon dioxide supplement unit 240 is added, the exhaled gas during the breathing process of the human body can be better simulated.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation device without the humidifying device 250, and in this case, the steps of providing the fifth check valve 205 and opening and closing the fifth check valve 205 are not required correspondingly. Of course, if the humidifying device 250 is added, the humidity of the exhaled air in the process of breathing of the human body can be better simulated.

The underwater respiration simulation method can control the pressure intensity range in the pressure chamber 210 to be 4 MPa-5 MPa.

Step one, providing an underwater breathing simulation device and a diving respirator. The underwater respiration simulation device is shown in fig. 5, and specifically comprises a pressure chamber 210, an oxygen consumption device 220 and a gas pumping device 230. The oxygen consumption device 220 and the gas extraction device 230 are located inside the pressure chamber 210. The gas input of the oxygen consumption device 220 is connected to the gas source 200, and the gas output of the oxygen consumption device 220 is connected to the gas input of the gas pumping device 230. The underwater breathing simulation device further comprises a carbon dioxide supplement device 240 positioned in the pressure chamber 210 and a humidifying device 250 positioned in the pressure chamber 210, and the contents of the underwater breathing simulation device can be referred to the contents of the above-mentioned description.

In this embodiment, the underwater breathing simulation device and the diving respirator are assembled in a manner equivalent to that after the diving respirator is worn by a human body, for example, an air mouthpiece of the diving respirator is connected to a gas input end of the underwater breathing simulation device, specifically, the gas input end is a gas input end of the oxygen consumption device 220, which can be referred to fig. 5. In other words, in this embodiment, the gas input of the oxygen consumption device 220 is connected to the gas source 200, and the gas source 200 is part of the scuba diving apparatus. The gas source 200 may in particular be a gas cylinder in the described scuba.

And step three, pressurizing the pressure chamber 210 to reach an underwater pressure environment when the scuba is used.

In this embodiment, the pressure chamber 210 is pressurized, and specifically, the pressure of the pressure chamber 210 can reach 4MPa to 5MPa, so as to simulate a corresponding diving pressure environment.

And step four, simulating the human body respiration by using an underwater respiration simulation device, and testing the resistance of the gas pumping device 230 in the underwater respiration simulation device in the gas pumping and exhausting process.

In this embodiment, simulating human breathing using the underwater breathing simulation apparatus includes: the gas evacuation device 230 is used to simulate the inhalation and exhalation of breathing gas by a human body. The gas pumping device 230 and the method for using the same can be referred to in fig. 2 for a specific simulation process.

It should be noted that, as described above, the movement speed of the piston 1212 in the gas pumping device 230 (shown in fig. 2) can be controlled, so as to simulate different breathing intensities and different breathing frequencies, and further, to test the breathing resistance of the scuba diving under the conditions of different breathing intensities and different breathing frequencies. That is, the present embodiment can test the resistance of the gas pumping device 230 during the gas pumping process under different working conditions of the gas pumping device 230, that is, can simulate and test the breathing resistance of the scuba diving under different breathing conditions of the human body.

In this embodiment, simulating human breathing using the underwater breathing simulation apparatus includes: the consumption of oxygen in the breathing gas by the human body is simulated using the oxygen consumption device 220. A specific simulation process may refer to the oxygen consumption device 220 and the method of using the same corresponding to fig. 3 and 4.

In this embodiment, because the carbon dioxide supplement device 240 exists, the resistance of the gas pumping device 230 during the gas pumping process before the carbon dioxide supplement device 240 supplements the carbon dioxide is tested, and the resistance of the gas pumping device 230 during the gas pumping process after the carbon dioxide supplement device 240 supplements the carbon dioxide is tested. To accurately test the breathing resistance of a scuba, the effect of carbon dioxide supplement 240 on the resistance can be repeatedly tested to more accurately measure the resistance.

In other embodiments, when the carbon dioxide supplement unit 240 is not present, the effect of the carbon dioxide supplement unit 240 on the corresponding resistance may not be considered. That is, the present embodiment can test the resistance of the gas pumping device 230 during pumping gas under different working conditions of the oxygen consumption device 220 and the carbon dioxide supplement device 240.

It should be noted that, as mentioned above, the control of the breathing quotient can be achieved by controlling the amount of oxygen consumed by the oxygen consumption device 220 in the breathing gas and controlling the amount of carbon dioxide supplemented by the carbon dioxide supplementing device 240. Therefore, the breathing resistance of the diving respirator can be tested under different breathing quotient conditions by adjusting and controlling the two devices.

In this embodiment, because the humidifying device 250 is present, the resistance of the gas pumping device 230 during pumping the gas before the humidifying device 250 performs humidification is tested, and the resistance of the gas pumping device 230 during pumping the gas after the humidifying device 250 performs humidification is tested. In other embodiments, when the humidifying device 250 is not present, the effect of the humidifying device 250 on the corresponding resistance may not be considered. To accurately test the breathing resistance of a scuba, the effect of humidifying device 250 on the resistance can be repeatedly tested to more accurately measure the resistance.

Referring to fig. 6, the underwater respiration simulation apparatus includes a pressure chamber 310, an oxygen consumption device 320, a gas pumping device 330, a carbon dioxide supplement device 340, a humidifying device 350, and a gas mixing device 360.

In this embodiment, the pressure chamber 310 may be a sealed chamber body, so that the pressure inside the pressure chamber 310 can be raised by introducing gas or the like.

In this embodiment, the pressure chamber 310 may be provided with a door that can be opened and closed, so that all of the above-described devices are disposed in the pressure chamber 310. Furthermore, in the present embodiment, the air source 3000 is also disposed in the pressure chamber 310, and the whole scuba diving apparatus with the air source 3000 is also disposed in the pressure chamber 310, so that the whole scuba diving apparatus is in the air pressure environment in the pressure chamber 310, which is beneficial to more accurately simulate the pressure environment to which the scuba diving apparatus is subjected when in use, and because the scuba diving apparatus and the underwater breathing simulation apparatus are completely in the same pressure environment, they can be together in the pressure environment closer to the real diving.

It should be noted that in other embodiments, the scuba (including the air source contained in the scuba) may be disposed outside the pressure chamber, and then the scuba alone may be disposed in the corresponding air pressure environment, which is as same as the pressure environment in the pressure chamber as possible.

In this embodiment, the pressure in the pressure chamber 310 may be set to be 4MPa to 5MPa according to the underwater pressure environment to be simulated, so as to simulate the real diving pressure condition.

In this embodiment, the oxygen consumption device 320 is located in the pressure chamber 310 and is configured to consume at least a portion of the oxygen in the breathing gas to simulate the consumption of oxygen by a human body. Since the human body does not consume all of the oxygen in the inhaled gas, the oxygen consumption device 320 usually does not consume all of the oxygen in the respiratory gas, but a part of the oxygen remains in the respiratory gas discharged by the underwater respiration simulation device.

In this embodiment, the gas evacuation device 330 is located within the pressure chamber 310 for drawing in breathing gas from the gas source 3000 (in this embodiment, breathing gas passes through the oxygen depletion device 320 before being drawn from the gas source 3000 into the gas evacuation device 330) and for exhausting the breathing gas to simulate the inspiratory and expiratory actions of a human being. The suction of the breathing gas from the gas source 3000 means that the gas pumping device 330 pumps the breathing gas originally stored in the gas cylinder (in this case, the gas source 3000 is the gas cylinder storing the breathing gas) into the whole underwater breathing simulation device through the pumping action of the gas pumping device 330 (this process includes pumping the breathing gas into the inside of the gas pumping device 330). The exhausting of the breathing gas means that the gas pumping device 330 exhausts the gas processed by the whole underwater breathing simulation device out of the underwater breathing simulation device (the process includes exhausting the breathing gas from the inside of the gas pumping device 330), and the flow power of the breathing gas mainly comes from the fact that the gas pumping device 330 exhausts the breathing gas from the inside of the gas pumping device 330, so that the gas output end of the whole underwater breathing simulation device exhausts the breathing gas with a corresponding volume.

In this embodiment, a carbon dioxide supplementing device 340 is located within the pressure chamber 310 for supplementing carbon dioxide to the breathing gas that has passed through the oxygen consuming device 320 to simulate the production of carbon dioxide by a human body.

In this embodiment, the oxygen consumption device 320 is used to simulate the process of oxygen consumption by a human body, and the carbon dioxide supplement device 340 is used to simulate the process of carbon dioxide production by a human body, so that the two processes are completely separated, quantitative control of oxygen consumption and carbon dioxide production is facilitated, and the carbon dioxide supplement device 340 can be omitted under certain conditions, thereby simplifying the structure. That is, the present embodiment separates the human body from the gas exchange process of consuming oxygen and forming carbon dioxide into two processes for treatment.

In this embodiment, a humidifying device 350 is located within the pressure chamber 310 for humidifying the breathing gas to simulate the humidity of the exhaled air of a human body. The humidifying device 350 may be a device that generates moisture, and the humidifying device may humidify the corresponding breathing gas to the humidity level of the exhaled gas of the human body as needed.

In this embodiment, a gas mixing device 360 is located within the pressure chamber 310 for mixing the breathing gas passing through the oxygen-consuming device 320 with supplemental carbon dioxide (provided by the carbon dioxide supplemental device 340) and water vapor (provided by the humidifying device 350).

With continued reference to fig. 6, the gas input of the oxygen consumption device 320 is connected to the gas source 3000, and the gas output of the oxygen consumption device 320 is connected to the first gas input of the gas pumping device 330.

In this embodiment, the gas source 3000 may also be located within the pressure chamber 310. The air source 3000 may be a gas cylinder filled with liquid air. The pressure of the gas in the gas cylinder can be 30MPa to 40 MPa. In other embodiments, the gas source 3000 may be located outside the pressure chamber 310.

Referring to fig. 6, the second gas input end of the gas pumping device 330 is connected to the gas output end of the carbon dioxide supplementing device 340, and the carbon dioxide supplemented by the carbon dioxide supplementing device 340 is directly supplemented to the gas pumping device 330.

In this embodiment, the carbon dioxide supplementing device 340 may supplement carbon dioxide into the gas pumping device 330 during the gas pumping process of the gas pumping device 330, or supplement carbon dioxide into the gas pumping device 330 during the gas pumping process of the gas pumping device 330, and discharge the carbon dioxide out of the gas pumping device 330 together with the gas pumping process.

With continued reference to fig. 6, a first gas input terminal of the gas mixing device 360 is connected to the gas output terminal of the gas pumping device 330, and a second gas input terminal of the gas mixing device 360 is connected to the output terminal of the humidifying device 350.

In this embodiment, the gas mixing device 360 has two gas inputs, and a first gas input of the gas mixing device 360 is connected to the gas output of the gas pumping device 330, and a second gas input of the gas mixing device 360 is connected to the output of the humidifying device 350. In other embodiments, the gas mixing device 360 may have more than three gas input ports, as long as each of the output ports is connected to the input port of the gas mixing device 360.

In this embodiment, the gas mixing device 360 may have a gas mixing turbine (not shown) inside, and by the rotation of the turbine, the different components input into the gas mixing device 360 are mixed well.

With continued reference to fig. 6, a first pressure relief valve 371 and a second pressure relief valve 372 are provided between the gas source 3000 and the oxygen consumption device 320, the first pressure relief valve 371 and the second pressure relief valve 372 are located within the pressure chamber 310, and the second pressure relief valve 372 is located between the first pressure relief valve 371 and the gas evacuation device 330.

In this embodiment, the breathing gas in the gas source 3000 can be reduced from a pressure range of 30MPa to 40MPa to a pressure substantially equal to the ambient pressure in the pressure chamber 310 by the pressure reduction action of the first pressure reducing valve 371 and the second pressure reducing valve 372, or the pressure range of the breathing gas can be reduced to a pressure slightly higher than the ambient pressure in the pressure chamber 310 (at this time, the ambient pressure is the pressure in the pressure chamber 300) after the pressure reduction action of the first pressure reducing valve 371 and the second pressure reducing valve 372, for example, about 0kPa to 500kPa higher than the ambient pressure. Wherein the first pressure reducing valve 371 can reduce the pressure of 30 MPa-40 MPa to about 10 MPa.

In the embodiment, the first pressure reducing valve 371 and the second pressure reducing valve 372 are arranged in the pressure chamber 310, so that the first pressure reducing valve 371 and the second pressure reducing valve 372 can work in a pressure environment which is closer to real diving, and the simulation level of the whole underwater breathing simulation device is improved.

In the present embodiment, the first pressure reducing valve 371 and the second pressure reducing valve 372 are part of the whole underwater breathing simulation device, but in other embodiments, the underwater breathing simulation device may not include the first pressure reducing valve 371 and the second pressure reducing valve 372, and the first pressure reducing valve 371 and the second pressure reducing valve 372 are part of the corresponding scuba.

With continued reference to fig. 6, a first check valve 301 is disposed between the second pressure reducing valve 372 and the gas pumping device 330, and a second check valve 302 is disposed between the oxygen consumption device 320 and the gas pumping device 330.

In this embodiment, the first one-way valve 301 is used to control the one-way flow of the respective breathing gas from the second pressure reducing valve 372 to the oxygen-consuming device 320. The second one-way valve 302 is used to control the one-way flow of the respective breathing gas from the oxygen consuming device 320 to the gas pumping device 330.

With continued reference to fig. 6, a third check valve 303 is provided between the carbon dioxide supplementing device 340 and the gas pumping device 330, a fourth check valve 304 is provided between the gas pumping device 330 and the gas mixing device 360, a fifth check valve 305 is provided between the humidifying device 350 and the gas mixing device 360, and a sixth check valve 306 is provided at the gas output end of the humidifying device 350.

In this embodiment, the one-way flow of breathing gas from the carbon dioxide supplementing device 340 to the gas pumping device 330 is controlled by the third one-way valve 303. The unidirectional flow of the breathing gas in the gas pumping device 330 to the gas mixing device 360 is controlled by the fourth one-way valve 304. The moisture supplemented by the humidifying device 350 is controlled to flow to the gas mixing device 360 in a single direction through the fifth check valve 305, and the mixed gas is controlled to be output from the gas mixing device 360 in a single direction through the sixth check valve 306.

It should be noted that, although not shown in fig. 6, the underwater respiration simulation apparatus provided in this embodiment further includes a temperature control system, and the temperature control system is used for controlling the temperature of the gas inside at least one of the gas pumping device 330 and the gas mixing device 360. Specifically, the temperature control system may be only used to control the temperature of the gas inside the gas pumping device 330, may also be only used to control the temperature of the gas inside the gas mixing device 360, and may also be used to control the temperature of the gas inside the gas pumping device 330 and the temperature of the gas inside the gas mixing device 360 at the same time. The control of the temperature of the gas inside each device generally means that the gas inside the device is properly heated so that the corresponding gas reaches a temperature corresponding to the actual breathing temperature of the human body. The temperature control system controls the temperature of the gas in each device to be about 37 ℃, so that the temperature of the gas in the breathing process of a human body is better simulated.

It should be noted that, considering that expansion with heat and contraction with cold may affect the gas pumping device 330, and further affect the resistance received by the gas pumping device 330 during operation, the temperature of the gas inside the gas pumping device 330 is generally controlled to be constant temperature.

In the underwater respiration simulation apparatus provided by this embodiment, the specific structure and the corresponding using method of the gas pumping device 330 can refer to fig. 2 and the corresponding contents of the corresponding embodiment. In the underwater respiration simulation device provided by this embodiment, the detailed structure and the corresponding using method of the oxygen consumption device 320 may refer to fig. 3 and 4 and the corresponding contents of the corresponding embodiments thereof. It should be noted that, in addition to the gas pumping device provided in fig. 2, the underwater respiration simulation apparatus provided in this embodiment may also use other gas pumping devices to simulate the inhalation and exhalation actions of the human body, and in addition to the oxygen consumption device shown in fig. 3 and 4, the underwater respiration simulation apparatus provided in this embodiment may also use other oxygen consumption devices to simulate the consumption of oxygen by the human body.

In the underwater respiration simulation apparatus provided by the present embodiment, the gas pumping device 330 is used to pump the breathing gas from the gas source 3000, and the pumped gas passes through the oxygen consumption device 320 to consume at least part of the oxygen in the breathing gas to simulate the consumption of oxygen by the human body, and then the breathing gas is further pumped from the oxygen consumption device 320 into the gas pumping device 330 and then exhausted by the gas pumping device 330 to simulate the inhalation and exhalation actions of the human body. That is to say, this embodiment adopts the simulation of the breathing process when the cooperation of two devices can realize the true dive of diver, consequently, breathe analogue means under water can be used for testing scuba to needn't be through the true dive of diver just can test scuba's each item performance, for example can test scuba's respiratory resistance. Thereby saving the testing cost and putting an end to the potential safety hazard of personnel. Simultaneously, because needn't just can test scuba through the true dive of diver, can also improve scuba's the convenient performance of test.

The underwater respiration simulation method comprises the following steps: the total gas input of the underwater breathing simulation apparatus is connected to the gas source 3000, and then the breathing gas is pumped from the gas source 3000 into the underwater breathing simulation apparatus by using the gas pumping device 330 (the arrow between the gas source 3000 and the pressure chamber 310 in fig. 6 represents the pumping direction of the breathing gas), at this time, the breathing gas firstly enters the oxygen consumption device 320, the oxygen consumption device 320 consumes at least part of the oxygen in the breathing gas to simulate the consumption of oxygen by the human body, and then, the breathing gas is continuously pumped into the gas pumping device 330 and then exhausted from the gas pumping device 330 to simulate the breathing and exhaling actions of the human body. Meanwhile, the carbon dioxide supplement device 340 is used to supplement carbon dioxide into the gas pumping device 330 to simulate the human body to generate carbon dioxide. After being exhausted by the gas pumping device 330, the respiratory gas is continuously exhausted into the gas mixing device 360. At the same time, the humidifying device 350 is used to add humidity to the breathing gas that has passed through the oxygen consumption device 320 to simulate the humidity of the exhaled air of a human body, and the water vapor supplemented by the humidifying device 350 is directly supplemented to the gas mixing device 360. The breathing gas that has passed through the oxygen consuming device 320 is then mixed with make-up water vapor by the gas mixing device 360. The mixed breathing gas is finally discharged through the gas outlet of the gas mixing device 360 (the arrow in fig. 6 at the gas outlet of the gas mixing device 360 represents the discharge direction of the breathing gas).

In this embodiment, the pressure of the breathing gas is reduced by the first pressure reducing valve 371 and the second pressure reducing valve 372 so that the pressure of the breathing gas is substantially equal to the pressure in the pressure compartment 300 before entering the oxygen-consuming device 320.

In this embodiment, the one-way flow of breathing gas from the second pressure reducing valve 372 to the oxygen consuming device 320 is controlled by providing a first one-way valve 301 between the second pressure reducing valve 372 and the oxygen consuming device 320, and the one-way flow of breathing gas from the oxygen consuming device 320 to the gas pumping device 330 is controlled by providing a second one-way valve 302 between the oxygen consuming device 320 and the gas pumping device 330.

In this embodiment, the third check valve 303 is provided between the carbon dioxide replenishing device 340 and the gas pumping device 330, so that the replenished carbon dioxide is controlled to flow from the carbon dioxide replenishing device 340 to the gas pumping device 330 in one direction. By providing the fourth one-way valve 304 between the gas pumping device 330 and the gas mixing device 360, the respective breathing gas flows in one direction from the gas pumping device 330 to the gas mixing device 360. The fifth one-way valve 305 is arranged between the humidifying device 350 and the gas mixing device 360, so that the water vapor supplemented by the humidifying device 350 is controlled to flow to the gas mixing device 360 in a one-way mode, and the sixth one-way valve 306 is arranged at the gas output end of the gas mixing device 360, so that the mixed gas is controlled to be output from the gas mixing device 360 in a one-way mode.

In this embodiment, when the gas pumping device 330 is pumping in breathing gas from the gas source 3000, the first one-way valve 301, the second one-way valve 302 and the third one-way valve 303 are opened, and the fourth one-way valve 304, the fifth one-way valve 305 and the sixth one-way valve 306 are closed, the breathing gas is pumped into the oxygen consumption device 320 first, and after passing through the oxygen consumption device 320, is continuously pumped into the gas pumping device 330, while the supplemented carbon dioxide also enters the gas pumping device 330 through the third one-way valve 303. When the gas pumping device 330 exhausts the breathing gas, the first check valve 301, the second check valve 302 and the third check valve 303 are closed, the fourth check valve 304, the fifth check valve 305 and the sixth check valve 306 are opened, the breathing gas is exhausted from the gas pumping device 330 and exhausted to the gas mixing device 360, meanwhile, the humidifying device 350 replenishes water vapor to the gas mixing device 360, so that the gas components in the gas mixing device 360 are uniformly mixed, and the breathing gas which is originally positioned in the gas mixing device 360 and is uniformly mixed is exhausted from the gas mixing device 360 when other parts of the gas are input, and is exhausted out of the pressure chamber 310 through the opened sixth check valve 306.

In other embodiments, the specific opening and closing of the respective one-way valves may also be performed in another way: when the gas pumping device pumps the breathing gas from the gas source, the first one-way valve and the second one-way valve are opened, the third one-way valve, the fourth one-way valve, the fifth one-way valve and the sixth one-way valve are closed, and the breathing gas is pumped into the oxygen consumption device firstly and is continuously pumped into the gas pumping device after passing through the oxygen consumption device. When the gas pumping device exhausts the breathing gas, the first one-way valve, the second one-way valve, the third one-way valve, the fourth one-way valve, the fifth one-way valve and the sixth one-way valve are opened, and the breathing gas is exhausted outwards from the gas pumping device and is exhausted to the gas mixing device. At the same time, the replenished carbon dioxide also enters the gas evacuation device via the third one-way valve and is discharged from the gas evacuation device with the other respiratory gases. Meanwhile, the humidifying device supplements water vapor to the gas mixing device, so that gas components in the gas mixing device are uniformly mixed, and the breathing gas which is originally positioned in the gas mixing device and is uniformly mixed is discharged out of the gas mixing device when other parts of gas are input, and is discharged out of the pressure chamber through the opened sixth one-way valve.

In this embodiment, the simulated respiratory quotient of the underwater respiration simulation device can be controlled to be 0.855 to 0.860, or 0.860 to 0.875, or 0.875 to 0.900, or 0.900 to 0.910 by adjusting the amount (amount) of oxygen consumed by the oxygen consumption device 320 and the amount (amount) of carbon dioxide supplemented by the carbon dioxide supplementing device 340. Under the three different breathing quotient conditions, the underwater breathing simulation device is used for respectively simulating the breathing conditions of a human body in the processes of mild activity (breathing quotient of 0.855-0.860), sleep (breathing quotient of 0.860-0.875), moderate activity (breathing quotient of 0.875-0.900) and severe activity (breathing quotient of 0.900-0.910), so that the breathing simulation method can be adopted for testing the diving respirator under various breathing conditions.

It should be noted that, although not shown in fig. 6, it can be understood from the foregoing that the method for simulating underwater respiration provided by the present embodiment can control the temperature of the gas inside at least one of the oxygen consumption device 320 and the gas mixing device 360 through the temperature control system.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation apparatus without the gas mixing device 360, and in this case, the steps of providing the fourth check valve 304 and opening and closing the fourth check valve 304 are not required correspondingly. At this time, the moisture supplemented by the humidifying device 350 can be directly input into the same pipeline for mixing. Of course, if the gas mixing device 360 is added, the gas can be mixed more uniformly, so that the breathing of the human body can be better simulated.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation device without the carbon dioxide supplement device 340, and in this case, the steps of providing the third check valve 303 and opening and closing the third check valve 303 are not required correspondingly. Of course, if the carbon dioxide supplement device 340 is added, the exhaled gas in the human body breathing process can be better simulated.

It should be noted that, in other embodiments, the underwater respiration simulation method may also be applied to an underwater respiration simulation device without the humidifying device 350, and in this case, the steps of providing the fifth check valve 305 and opening and closing the fifth check valve 305 are not required correspondingly. Of course, if the humidifying device 350 is added, the humidity of the exhaled air in the process of breathing of the human body can be better simulated.

The underwater respiration simulation method can control the pressure intensity range in the pressure cabin 310 to be 4 MPa-5 MPa.

Step one, providing an underwater breathing simulation device and a diving respirator. The underwater respiration simulation device is shown in fig. 6 and specifically comprises a pressure chamber 310, an oxygen consumption device 320 and a gas pumping device 330. The oxygen consumption device 320 and the gas evacuation device 330 are located inside the pressure chamber 310. The gas input of the oxygen consumption device 320 is connected to the gas source 3000, and the gas output of the oxygen consumption device 320 is connected to the gas input of the gas pumping device 330. The underwater breathing simulation device further comprises a carbon dioxide supplement device 340 positioned in the pressure chamber 310 and a humidifying device 350 positioned in the pressure chamber 310, and the contents of the underwater breathing simulation device can be referred to the contents of the underwater breathing simulation device.

In this embodiment, the underwater breathing simulation device and the diving respirator are assembled in a manner equivalent to that after the diving respirator is worn by a human body, for example, an air mouthpiece of the diving respirator is connected to a gas input end of the underwater breathing simulation device, specifically, the gas input end is a gas input end of the oxygen consumption device 320, which can be referred to fig. 6. In other words, in this embodiment, the gas input of the oxygen consumption device 320 is connected to the gas source 3000, and the gas source 3000 is part of the scuba. The air source 3000 may specifically be an air cylinder in the scuba. Also, in this embodiment, the scuba diving apparatus is also located in the pressure chamber 310.

And step three, pressurizing the pressure chamber 310 to reach an underwater pressure environment when the scuba is used. At the moment, the scuba is also in the same underwater pressure environment as the underwater respiration simulator.

In this embodiment, the pressure chamber 310 is pressurized, and specifically, the pressure of the pressure chamber 310 can reach 4MPa to 5MPa, so as to simulate a corresponding diving pressure environment.

And step four, simulating the human body respiration by using an underwater respiration simulation device, and testing the resistance of the gas pumping and exhausting device 330 in the underwater respiration simulation device in the gas pumping and exhausting process.

In this embodiment, simulating human breathing using the underwater breathing simulation apparatus includes: the gas evacuation device 330 is used to simulate the inhalation and exhalation of breathing gas by a human body. The specific simulation process can refer to the gas pumping device 330 and the method of using the same in fig. 2.

It should be noted that, as described above, the movement speed of the piston 1212 in the gas pumping device 330 (shown in fig. 2) can be controlled to simulate different breathing intensities and different breathing frequencies, so as to test the breathing resistance of the scuba diving under different breathing intensities and different breathing frequencies. That is, the present embodiment can test the resistance of the gas pumping device 330 during the gas pumping process under different working conditions of the gas pumping device 330, that is, can simulate and test the breathing resistance of the scuba diving under different breathing conditions of the human body.

In this embodiment, simulating human breathing using the underwater breathing simulation apparatus includes: the consumption of oxygen in the breathing gas by the human body is simulated using the oxygen consumption device 320. The specific simulation process can refer to the oxygen consumption device 320 and the use method thereof corresponding to fig. 3 and 4.

In this embodiment, because the carbon dioxide supplement device 340 is present, the resistance of the gas pumping device 330 during the gas pumping process before the carbon dioxide supplement device 340 performs the carbon dioxide supplement is tested, and the resistance of the gas pumping device 330 during the gas pumping process after the carbon dioxide supplement device 340 performs the carbon dioxide supplement is tested. To accurately test the breathing resistance of a scuba, the effect of carbon dioxide supplement 340 on the resistance can be repeatedly tested to more accurately measure the resistance.

In other embodiments, when carbon dioxide supplement 340 is not present, the effect of carbon dioxide supplement 340 on the corresponding resistance may not be considered. That is, the present embodiment can test the resistance of the gas pumping device 330 during pumping gas under different working conditions of the oxygen consumption device 320 and the carbon dioxide supplement device 340.

It should be noted that, as mentioned above, the control of the breathing quotient can be achieved by controlling the amount of oxygen consumed by the oxygen consumption device 320 for breathing gas and controlling the amount of carbon dioxide supplemented by the carbon dioxide supplementing device 340. Therefore, the breathing resistance of the diving respirator can be tested under different breathing quotient conditions by adjusting and controlling the two devices.

In this embodiment, because the humidifying device 350 is present, the resistance of the gas pumping device 330 during pumping the gas before the humidifying device 350 humidifies is tested, and the resistance of the gas pumping device 330 during pumping the gas after the humidifying device 350 humidifies is tested. In other embodiments, when the humidifying device 350 is not present, the effect of the humidifying device 350 on the corresponding resistance may not be considered. To accurately test the breathing resistance of a scuba, the effect of humidifying device 350 on the resistance can be repeatedly tested to more accurately measure the resistance.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A breathing resistance test method of a diving respirator is characterized in that an underwater breathing simulation device is adopted to test the performance of the diving respirator, and the underwater breathing simulation device comprises:

the pressure cabin is suitable for setting the pressure range in the pressure cabin according to the underwater pressure environment to be simulated, so that the simulation of the real diving pressure condition is realized;

a gas pumping device adapted to pump in and out breathing gas from a gas source to simulate the inspiratory and expiratory actions of a human body;

an oxygen consumption device adapted to consume at least part of the oxygen in the breathing gas to simulate consumption of oxygen by a human body;

carbon dioxide supplementing means adapted to supplement carbon dioxide to the breathing gas that has passed through the oxygen consuming device to simulate the production of carbon dioxide by a human body;

humidifying means adapted to humidify the breathing gas to simulate the humidity of the exhaled air of the human body;

a gas mixing device adapted to mix the breathing gas passing through the oxygen consuming device with supplemental carbon dioxide and water vapor;

wherein, the gas pumping device includes:

a cylinder having a cylinder barrel, a piston, and a connecting rod;

the cylinder barrel is provided with a gas output end and a gas input end;

the piston is positioned in the cylinder barrel;

one end of the connecting rod is connected with the piston;

the motor is connected with the other end of the connecting rod;

the respiratory resistance test method comprises the following steps:

providing an underwater breathing simulation device and a diving respirator;

assembling the underwater breathing simulation device and a scuba together;

pressurizing the pressure chamber to reach an underwater pressure environment when the scuba is used;

simulating human body respiration by using an underwater respiration simulation device, and testing the resistance of a gas pumping device in the underwater respiration simulation device in the gas pumping and exhausting process, namely the respiration resistance of the scuba;

the use method of the gas pumping device comprises the following steps:

when the piston moves towards the direction far away from the gas output end and the gas input end, the gas input end is opened, the gas output end is closed, and the cylinder sucks corresponding breathing gas into the cylinder barrel from the gas input end to complete the simulation of the inspiration action of the human body;

when the piston moves towards the direction close to the gas output end and the gas input end, the gas input end is closed, the gas output end is opened, the cylinder discharges the breathing gas in the cylinder barrel from the gas output end out of the cylinder barrel, and the simulation of the human body exhalation action is completed.

2. The breathing resistance testing method of a diving respirator as claimed in claim 1, wherein the displacement of said cylinder is equal to or greater than the maximum lung capacity of the human body, and the volume of said breathing gas drawn into said cylinder is controlled by controlling the stroke of said piston in said cylinder.

3. The method for testing respiratory resistance of a scuba diving as claimed in claim 1, wherein said gas pumping device further comprises a speed control system by which the speed of said piston is controlled.

4. A method of testing respiratory resistance of a scuba diving according to claim 3, wherein the piston is controlled to be divided into two movement phases during one single movement, wherein the movement speed of the first movement phase is higher than the movement speed of the second movement phase.

5. A method of testing the respiratory resistance of a scuba diving according to claim 1, wherein the gas pumping device further comprises a resistance monitoring system by which the resistance experienced by the piston during movement is monitored.

6. A method of testing respiratory resistance of a scuba according to claim 1, wherein the piston is arranged to reciprocate at different speeds and the resistance experienced by the piston during each reciprocation is monitored.