46 results about "Carbon dioxide monitor" patented technology

A system detects the presence of a living being within a vehicle and triggers an alarm should the temperature rise above or fall below a predetermined threshold limit. The system uses a carbon dioxide monitor to determine for the living being's presence, which is backed up by one or more subsystems that include a motion sensor that senses motion, a sound sensor that senses sounds, especially those made by distressed living beings, and a camera that uses facial recognition software to detect a face within the vehicle. The alarm can be staged so that a lower level of alarm is triggered when the hazardous temperature is approaching, but has not yet reached critical levels, and one of the subsystems has detected a living being within the vehicle, but the others have not yet activated, and a higher level alarm once critical temperatures have been reached.

An oropharyngeal device for insertion into the mouth of a patient. The device includes a body having a distal end and a proximal end with a flange formed at the proximal end. The distal end is inserted into the mouth until the flange is disposed outside and adjacent to the patient's mouth. The flange keeps the proximal device from entering the mouth. The body is sized such that the distal end of the body is disposed within the pharynx above the epiglottis. The device includes a channel that forms an airway between the ends. The device also includes at least three separate conduits integrated into the body for administering oxygen, suctioning, and for assessing ventilation thorough end-tidal carbon dioxide monitoring. The conduits for oxygenation and suctioning extend through the body between its proximal and distal ends. The conduit for end-tidal carbon dioxide monitoring terminates within the channel.

A breathing circuit is described for the supplying of low pressure oxygen to a patient that is at risk of hypoxia. The breathing circuit includes a patent airway maintaining device, a first tube that includes a substantially rigid elbow and connectors and a flexible tubular extension. An inflatable bag is coupled to the first tube and has a pressure relief valve that exhausts into the atmosphere. A second tube has a first end that terminates in proximity to the patent airway maintaining device and a second opposed end that terminates external to the first tube. A third tube connects an external source of oxygen to the second tube. A method for an oxygen breathing circuit is also described that further includes the use of a carbon dioxide monitor and the inflatable bag for assisted breathing. The breathing circuit uses only non-metallic polymer or composite type materials.

The invention discloses a renewable energy source, self-adaptation and energy gradient utilization integrated air-conditioning system. The renewable energy source, self-adaptation and energy gradient utilization integrated air-conditioning system comprises an evaporative cooling air-conditioning unit, a solar power generation and supply system, a solar water heating system, an evaporative cooling air-conditioning unit rainwater collection water complementing system and a carbon dioxide automatic monitoring system, wherein the solar power generation and supply system, the solar water heating system, the evaporative cooling air-conditioning unit rainwater collection water complementing system and the carbon dioxide automatic monitoring system are respectively connected with the evaporative cooling air-conditioning unit, and the evaporative cooling air-conditioning unit is communicated with an air-conditioning area through an air pipe network. By means of the air-conditioning system, solar power generation, solar water heating and rainwater collection can be integrated, and meanwhile distribution of return air is reasonably controlled through a carbon dioxide monitor so that the cooling capacity generated by the unit can be completely utilized, and the good indoor air quality can be maintained.

The invention relates to a real-time monitoring system and a method for carbon dioxide geological storage based on a wireless sensor network and belongs to the field of carbon dioxide remote real-time monitoring. The real-time monitoring system comprises a monitoring server, a plurality of remote data repeaters respectively connected with the monitoring server through a GPRS (General Packet Radio Service) wireless communication network, and a plurality of carbon dioxide monitoring instruments which are wirelessly interconnected in a star-shaped local area network structure by taking all the remote data repeaters as the center, wherein each remote data repeater comprises a power module, a microcontroller, short-range wireless receiving modules respectively connected with the microcontroller, an SD (Secure Digital) storage module, an LCD (Liquid Crystal Display) module and a GPRS wireless transmission module, and each carbon dioxide monitoring instrument comprises a power module, a microcontroller, monitoring well sensor groups respectively connected with the microcontroller, a GPS (Global Positioning System) positioning module and a short-range wireless transmitting module. According to the system and method provided by the invention, the monitoring requirements of wide-range dispersion and small-scale dense distribution of carbon dioxide geological storage monitoring wells are taken into account, and the system is simple in structure, flexible in stationing, capable of realizing remote real-time wireless transmission and real-time display, and low in cost and power consumption.

An apparatus and method for delivering oxygen to a nasopharynx and withdrawing exhale gas from the nasopharynx to a carbon dioxide monitor. In one embodiment, the apparatus can comprise one or more tubes and an airway fitting forming an airway. The airway fitting can be configured to engage at least one of the tubes and maintain the one or more tubes within the airway, and to provide an outlet to the atmosphere for the airway. In another embodiment, the tube might be in fluid communication with a junction that can direct oxygen from an oxygen supply through the tube and exhale gas from the tube to the carbon dioxide monitor. Further, the tube might comprise an outer tube and an inner tube.

The present invention relates to a carbon dioxide monitoring apparatus for vehicles, and to a carbon dioxide management system and carbon dioxide management method using same. It is an aim of the present invention to provide a carbon dioxide monitoring apparatus for vehicles, as well as a carbon dioxide management system and a carbon dioxide management method using same, which enable drivers and passengers to visually check the amount of carbon dioxide emitted by vehicles to alert the drivers and passengers to the emission of carbon dioxide, and which compensate vehicle owners for reducing the emission of carbon dioxide by maintaining a constant travel speed or the like, thereby correcting driving habits and reducing the emission of carbon dioxide, thus achieving environmentally-friendly fuel-saving effects. To accomplish the aim, the carbon dioxide monitoring apparatus for vehicles according to the present invention comprises: a microcomputer (110) in which identification numbers of vehicles are stored; detection means for detecting travel-related information from vehicles in accordance with the control of the microcomputer; arithmetic operation means for calculating the amount of CO2 reduction by comparing the amount of CO2 emitted, obtained from the travel-related information, to standard fuel efficiency; transmitting / receiving means for transmitting / receiving arithmetic operation information on the amount of CO2 emitted through a wired or wireless system; an external output port (150) for outputting the arithmetic operation information on the amount of CO2 emitted and travel-related information stored in the microcomputer (110) to the outside; and a display (160) for displaying the arithmetic operation information on the amount of CO2 emitted on a real-time basis.

The invention relates to an air passage block and an end-expiratory carbon dioxide monitoring module manufactured by adopting the same. In the invention, an air outlet chamber communicated with a vacuum pump component and an air inlet chamber communicated with a carbon dioxide concentration measurement component are arranged in an air passage block body; the air outlet chamber is provided with anair hole communicated with the outside by two parts, the air inlet chamber is provided with an inner side air hole communicated with the outside by two parts respectively and an outer side air hole communicated with the outside by one part, and the outer side of the outer side air hole is also provided with a blind hole which is communicated with the outside by two parts and is not communicated with the air inlet chamber; and a connecting pipe used for generating pressure drop is arranged between the air outlet chamber and the air inlet chamber. As complicated pipeline connection is omitted, the pressure and the flow rate loss of gas expired by a patient is reduced when being transmitted in the monitoring module, and the measurement of carbon dioxide expired by the patient is more accurate. By arranging the connecting pipe used for generating pressure drop, a pressure difference is provided to measure the flow rate, and the whole structure and the installation are simplified. A pressure difference sensor adopts the connection of a flexible PCB plate and a main PCB plate, which obviously saves the space; the vibration damping performance of the vacuum pump component is reliable.

A breathing circuit is described for the supplying of low pressure oxygen to a patient that is at risk of hypoxia. The breathing circuit includes a patent airway maintaining device, a first tube that includes a substantially rigid elbow and connectors and a flexible tubular extension. An inflatable bag is coupled to the first tube and has a pressure relief valve that exhausts into the atmosphere. A second tube has a first end that terminates in proximity to the patent airway maintaining device and a second opposed end that terminates external to the first tube. A third tube connects an external source of oxygen to the second tube. A method for an oxygen breathing circuit is also described that further includes the use of a carbon dioxide monitor and the inflatable bag for assisted breathing. The breathing circuit uses only non-metallic polymer or composite type materials.

Provided is a greenhouse device monitoring growth factor of a plant factory and a monitoring method thereof. The device and the method are applied in a greenhouse. The greenhouse device comprises a carbon dioxide monitoring module, an ozone monitoring module, and an ethylene monitoring module. The carbon dioxide monitoring module monitors carbon dioxide concentration in the greenhouse. The ozone monitoring module monitors ozone concentration in the greenhouse. Ozone treatment is performed on the greenhouse through the ozone supplied by the ozone monitoring module. The ethylene monitoring module monitors ethylene concentration in the greenhouse.

The invention relates to the technical field of automobiles, in particular to an anti-fatigue driving system. The anti-fatigue driving system comprises a carbon dioxide monitor and a vehicle controller which are arranged in a vehicle; the carbon dioxide monitor is used for monitoring the concentration of carbon dioxide in the vehicle under the running state and sending warning information to the vehicle controller when the concentration of the carbon dioxide is higher than a first preset value; the vehicle controller controls an air conditioner in the vehicle in an external circulation state according to the warning information. The anti-fatigue driving system has the advantages that the concentration of the carbon dioxide in the vehicle under the driving state is monitored in real time through the carbon dioxide monitor, when the concentration of the carbon dioxide in the vehicle reaches a threshold easily leading to brain hypoxia, the external circulation of the air conditioner is started through the vehicle controller, thereby preventing a driver from fatigue driving due to hypoxia.

The invention relates to an anti-haze baby carriage comprising a compartment, a roof, wheels and a push handle; the wheels are arranged on the bottom of the compartment; the push handle is connected on the compartment; the roof is arranged above the compartment, and the rear end of the roof is a rotary stackable structure; the compartment is a fully enclosed structure, comprises an inner layer and an outer layer, and a hollow interlayer is formed; the outer layer of the compartment is provided with a fresh air inlet; a filter is arranged in the fresh air inlet; the hollow interlayer is provided with a fresh air blower matched with the fresh air inlet; the inner layer of the compartment is provided with an air inlet and an air outlet; the outer layer of the compartment is provided with an exhaust fan; the exhaust fan and the air outlet are connected through an exhaust pipe; the inner layer of the compartment is provided with a carbon dioxide monitoring alarm device; the roof is provided with an emergency ventilation curtain connected with the carbon dioxide monitoring alarm device and a controller. The anti-haze baby carriage can satisfy normal travelling needs, and can provide clean and comfortable compartment air environment under a bad outdoor air quality condition; the anti-haze baby carriage is safe and reliable.

The invention discloses a side-stream type end-tidal carbon dioxide detecting device. The device comprises a first shell body provided with an airflow hole, a first connecting end head located in thefirst shell body and fixed in the airflow hole, a duct, a first external connecting joint, a detecting duct and an air pump, wherein one end of the duct is communicated with a side-stream branch pathof a breathing loop, the other end of the duct is connected with the first external connecting joint, and the first external connecting joint is in plug connection with the first connecting end head;an infrared detector is arranged in the first shell body and comprises an emitter and a receiver; one end of the detecting duct is connected with the first connecting end head and located between theemitter and the receiver; the air pump is communicated with the detecting duct. The side-stream type end-tidal carbon dioxide detecting device is simple in structure, smaller in size and convenient tocarry and use, in the using process, the side-stream type end-tidal carbon dioxide detecting device and a hand-hold end-tidal carbon dioxide monitor can be used as a set, and the problem that in theusing process, the detecting effect is poorer due to the fact that the duct is separated from the device is solved.

The invention discloses a filter, an air cabinet unit and an air conditioning unit. The filter comprises a frame, a filter screen, a driving mechanism and a detection unit, wherein the filter screen is rotationally arranged in the frame, the driving mechanism is used for driving the filter screen to rotate, the driving mechanism comprises a driving motor; the driving motor is in transmission connection with the filter screen, the filter further comprises a controller, and the detection unit is connected with the controller; the detection unit comprises a differential pressure alarm device, andwhen the differential pressure value exceeds a first preset value, the driving mechanism drives the filter screen to rotate by 180 degrees; the detection unit further comprises a carbon dioxide monitoring device, and when the carbon dioxide monitoring device detects that the concentration of carbon dioxide is lower than a second preset value, the filter screen rotates to be parallel to the airflow direction. Compared with the prior art, when air does not need to be filtered, the air does not pass through the filter screen, and when too much dust is accumulated on the filter screen to affect the filtering efficiency, the filter screen can be rotated by 180 degrees to blow away dust by air, and the problem that in the prior art, the air cabinet unit is high in excessive energy consumption is solved.

A device to facilitate carbon dioxide sampling in the exhalation breath of a person comprising a single nasal prong (10) insertable into a nostril of the person having a first lumen (20) which allows gas passage from the nostril to the surrounding external air, a second lumen (34) located within the first lumen (20). A tube (40) is connected at a first end (42) to an end of the second lumen (34) that is further from the nostril and connectable at a second end (44) to a carbon dioxide monitoring device (50). The carbon dioxide monitoring device (50) detects the level of carbon dioxide in the portion of the person's exhalation that passes through the second lumen (34). The portion of the person's exhalation that passes through the first lumen (20) is dispersed in the surrounding air.

The invention relates to medical instruments, in particular to a tracheal catheter capable of directly monitoring the end-tidal carbon dioxide partial pressure of an infant. The tracheal catheter comprises a catheter body, a cuff, a connector, an opening and a thin tube, wherein the cuff is connected to one end of the catheter body, the connector is arranged at the other end of the catheter body, the opening is arranged in a position, between the cuff and the connector and close to the cuff, of the catheter body and connected with the thin tube, and the tail end of the thin tube is connected with an end-tidal carbon dioxide monitor. The tracheal catheter has the advantages that the tracheal catheter is improved to solve the technical problem that due to the fact that the infant is low in body weight, if an existing tail-end sampling device is used, the dilution effect of fresh air flow in the tracheal catheter on carbon dioxide is evident, and the measured end-tidal carbon dioxide is evidently lower than an actual value, the sampling part opening 1 is close to the top end of the tracheal catheter, the inner diameter of the thin tube 2 is small, the fresh air quantity in the thin tube 2 is low, influence of the fresh air flow on the collected breathing gas at the top end of the tracheal catheter is small, the end-tidal carbon dioxide level can be reflected accurately, and the tracheal catheter is evident in use effect.

The invention relates to a soil carbon dioxide concentration monitoring device and method. The soil carbon dioxide concentration monitoring device comprises drill bits, carbon dioxide concentration probes, temperature and humidity probes, a power supply module and a data acquisition unit. The drill bits drill out drill holes for burying the carbon dioxide concentration probes and the temperature and humidity probes respectively in soil. The data acquisition unit is connected with the carbon dioxide concentration probes and the temperature and humidity probes through data lines, and the monitoring data of the carbon dioxide concentration probes and the temperature and humidity probes are preserved. The power supply module is connected with the carbon dioxide concentration probes, the temperature and humidity probes and the data acquisition unit through wires. The soil carbon dioxide concentration monitoring device and method have the advantages that monitoring data are accurate and stable, disturbance to soil is lowered to the minimum, the soil carbon dioxide concentration of a certain depth can be monitored, the probes are protected, influences on monitoring of continuous rainfall are avoided, the soil carbon dioxide concentration monitoring device can conduct soil monitoring continuously in tropical regions and subtropical regions for a long time, a display meter is added, power is supplied through batteries, the soil carbon dioxide concentration can be fast measured outdoors, and the soil carbon dioxide concentration monitoring device has the advantages of being quick in response, high in accuracy, free of reagent supply and the like.

The invention discloses a system for monitoring ARDS development of patients. The system comprises a master micro controller unit (MCU), wherein the master micro controller unit (MCU) is separately connected to data interfaces of a mechanical ventilation-respiratory mechanics monitoring module, a pulse index continuous cardiac output monitoring module, a central venous pressure and pulmonary artery pressure monitoring module, an oxygen metabolism dynamic monitoring module, a fibreoptic bronchoscopy module, an end-tidal carbon dioxide monitoring module and a broncholveolr lvge fluid and pulmonary tissue pathological examination module through bidirectional buses; an output end of the master micro controller unit (MCU) is also connected to an input end of a critical degree judgment module; the output end of the critical degree judgment module is also connected to the input end of a communication module; and the output end of the communication module is connected to the input end of a center console. According to the system, real-time monitoring data can be acquired, so that comprehensive examination of the patients is facilitated, differential diagnosis of an ARDS and multiple diseases is facilitated, and meanwhile, level judgment is more conducive to follow-up treatment on different patients.

The invention discloses a source end-tidal carbon dioxide monitoring tracheal intubation navigation device including several carbon dioxide sensors, wherein one end of the carbon dioxide sensor is connected with one end of each carbon dioxide guide pipe, the other end of each carbon dioxide sensor is connected with a trachea line concentration connector through an air guide pipe, the trachea lineconcentration connector is connected with an air pump, and the other end of the carbon dioxide guide pipe is gathered and inserted into a guide pipe of the trachea cannula. The guide pipe can be usedfor tracheal intubation so that the guide pipe has a carbon dioxide monitoring function, and the proper position of the tracheal intubation can be conveniently determined.

The invention relates to the technical field of environmental monitoring, in particular to a cloud computing environment monitoring system. The cloud computing environment monitoring system comprisesa sub-monitoring point; the sub-monitoring point is electrically connected with a data acquisition module and a power source module; the data acquisition module comprises an air temperature monitoringmodule; the air temperature monitoring module and an air humidity monitoring module are electrically connected, and the air humidity monitoring module is electrically connected with a soil pH monitoring module; the soil pH monitoring module is also electrically connected with a carbon dioxide monitoring module; the carbon dioxide monitoring module is electrically connected with an illumination monitoring module; the sub-monitoring point is further electrically connected with a monitoring terminal module; the monitoring terminal module is also electrically connected with a microprocessor; themicroprocessor is electrically connected with an intelligent mobile terminal; and the intelligent mobile terminal is electrically connected with a cloud computing platform. The cloud computing environment monitoring system can stably monitor the environmental quality in real time in a low cost; if an environmental safety accident occurs, the user can be informed at the first time; and the cloud computing environment monitoring system is beneficial to the agricultural planting.

A breathing circuit is described for the supplying of low pressure oxygen to a patient that is at risk of hypoxia. The breathing circuit includes a patent airway maintaining device, a first tube that includes a substantially rigid elbow and connectors and a flexible tubular extension. An inflatable bag is coupled to the first tube and has a pressure relief valve that exhausts into the atmosphere. A second tube has a first end that terminates in proximity to the patent airway maintaining device and a second opposed end that terminates external to the first tube. A third tube connects an external source of oxygen to the second tube. A method for an oxygen breathing circuit is also described that further includes the use of a carbon dioxide monitor and the inflatable bag for assisted breathing. The breathing circuit uses only non-metallic polymer or composite type materials.

The invention relates to an air passage block and an end-expiratory carbon dioxide monitoring module manufactured by adopting the same. In the invention, an air outlet chamber communicated with a vacuum pump component and an air inlet chamber communicated with a carbon dioxide concentration measurement component are arranged in an air passage block body; the air outlet chamber is provided with anair hole communicated with the outside by two parts, the air inlet chamber is provided with an inner side air hole communicated with the outside by two parts respectively and an outer side air hole communicated with the outside by one part, and the outer side of the outer side air hole is also provided with a blind hole which is communicated with the outside by two parts and is not communicated with the air inlet chamber; and a connecting pipe used for generating pressure drop is arranged between the air outlet chamber and the air inlet chamber. As complicated pipeline connection is omitted, the pressure and the flow rate loss of gas expired by a patient is reduced when being transmitted in the monitoring module, and the measurement of carbon dioxide expired by the patient is more accurate. By arranging the connecting pipe used for generating pressure drop, a pressure difference is provided to measure the flow rate, and the whole structure and the installation are simplified. A pressure difference sensor adopts the connection of a flexible PCB plate and a main PCB plate, which obviously saves the space; the vibration damping performance of the vacuum pump component is reliable.

The invention relates to a sterile cultivation device capable of achieving automatic monitoring and regulation of multiple culture conditions. The device mainly comprises a cultivation device body, a water inlet, a water outlet, a water storage tank, a wastewater tank, a belt filter pellicle water manifold interface, a multi-interface water suction pump, a water manifold interface, a CPU microprocessor, an oxygen / carbon dioxide monitor, a thermosensitive sensor and other detection instruments, a PH instrument, a pressure sensor, an ion concentration detector and a moisture sensor, wherein the oxygen / carbon dioxide monitor, the thermosensitive sensor, the PH instrument, the pressure sensor, the ion concentration detector and the moisture sensor are connected with the CPU microprocessor through sensor line channels respectively, the water storage tank and the wastewater tank are connected with the cultivation device body into a whole and communicated with a water guiding hose through the multi-interface water suction pump, and the water guiding hose is connected with a filtering and degerming unit; a sterile environment in the cultivation device is guaranteed, whether a plant growth environment is normal is monitored continuously, and normal PH of culture solution in the water storage tank is guaranteed. By the adoption of the device, automatic cultivation can be achieved, long-term cultivation of aseptic seedlings is achieved, and operation is easy and convenient.

The invention discloses a fruit classification and preservation monitoring system, which comprises a processor, a carbon dioxide monitoring module, a temperature monitoring module, a humidity monitoring module, an input module, an air conditioning control module, a humidifier control module, a data transmission module and an early warning module, wherein the processor is arranged in a general monitoring room and is responsible for receiving information uploaded by the carbon dioxide monitoring module, the temperature monitoring module, the humidity monitoring module and the input module, setting thresholds and sending control instructions; the carbon dioxide monitoring module and the temperature monitoring module are arranged in the storage room for each class of fruit; the air conditioning control module is responsible for receiving a control instruction to control operation of the air conditioner; the humidifier control module is responsible for receiving a control instruction to control operation of the humidifier; and the early warning module is connected with the processor and is responsible for performing early warning when the processor sends the control instructions. The operation states of the air conditioner and the humidifier in the storage room for each class of fruit can be adjusted, and fruit storage management is facilitated.

The invention discloses indoor plant factory planting integrated equipment which comprises a three-dimensional cultivation frame (2) with a plurality of cultivation layers, growth grooves (1) placed on the cultivation layers, LED plant light supplementing light sources (3) arranged above the growth grooves (1), natural wind simulators (11) arranged on the side walls of the cultivation layers and spraying equipment arranged above the growth grooves (1). The LED plant light supplementing light source (3), the natural wind simulator (11) and the spraying device are all electrically connected with the controller, a temperature sensor (6), a carbon dioxide monitor (7) and a humidity sensor (8) are arranged at the top of the three-dimensional cultivation frame (2), and the temperature sensor (6), the carbon dioxide monitor (7) and the humidity sensor (8) are all electrically connected with the controller. The indoor plant factory planting integrated equipment can automatically control environmental conditions such as temperature, humidity, illumination, carbon dioxide concentration and moisture of plant growth, and annual continuous and efficient production of plants is achieved.

The invention discloses an atmospheric environment carbon dioxide monitoring device for highway engineering. The atmospheric environment carbon dioxide monitoring device is characterized in that the atmospheric environment carbon dioxide monitoring device comprises a gas production opening (1), a gas inlet (2), a carbon dioxide equipment box (3), a light-receiving component (4), a first gas exhaust opening (5), a first fan motor (6), a first gas exhaust pipeline (7), a second gas exhaust pipeline (8), a second fan motor (9), a second gas exhaust opening (10), an infrared light-emitting component (11), an absorbing plate (12), a first gas exhaust channel (13), a second gas exhaust channel (14), a data collecting and storing system and a power supplying system. The power supplying system adopts a solar cell panel or a storage battery, and the first gas exhaust pipeline (7) is provided with an automatic filtering function. The atmospheric environment carbon dioxide monitoring device is easy to manufacture and high in measuring precision, and has the self-cleaning function under the carbon dioxide heavy-pollution condition; and the concentration of carbon dioxide can be measured independently, and the concentration of the vehicle-mounted movable carbon dioxide can also be measured.

A method for monitoring carbon dioxide in the atmospheric environment of a highway project, which is characterized by using a carbon dioxide monitoring device to monitor the carbon dioxide in the atmospheric environment of the highway project. The device includes a gas extraction port (1), an air inlet (2), and a carbon dioxide equipment box (3). Light-receiving element (4), first exhaust port (5), first fan motor (6), first exhaust pipe (7), second exhaust pipe (8), second fan motor (9) , second exhaust port (10), infrared light-emitting element (11), absorption plate (12), first exhaust channel (13), second exhaust channel (14), data acquisition and storage system and power supply system, Chapter An exhaust pipe (7) has an automatic filtering function. This method can meet the self-cleaning function of the equipment under heavy carbon dioxide pollution conditions. It can measure the carbon dioxide concentration independently, or it can measure the carbon dioxide concentration on a vehicle-mounted mobile device.

The invention provides a converter for monitoring end-tidal carbon dioxide, which comprises a converter body and is characterized in that a space for circulating gas is reserved in the converter; the outer wall of the converter body is provided with a first interface and a second interface, and the first interface and the second interface are communicated through a first channel. The outer wall of the converter body is also provided with a third interface and a fourth interface which are communicated with the space. The third connector is used for being connected with a nasal oxygen inhalation tube. The fourth connector is used for being connected with the large-diameter end of the mainstream type end-tidal carbon dioxide monitor sampler; the converter body is provided with the first connector, the second connector and the third connector, sampling of gas exhaled by a patient when an oxygen mask and a snorting type oxygen catheter are used is achieved, meanwhile, the fourth connector can be used for being connected with the large-diameter end of a mainstream type end-tidal carbon dioxide monitor sampler, and therefore the sampling efficiency is improved. The detection on the exhaled gas of the patient is realized.