CN202497576U - positive pressure oxygen respirator - Google Patents

Abstract

A positive pressure oxygen respirator, including an oxygen cylinder, an inspiratory cooling device, and an inspiratory tube, the inspiratory cooling device includes a pressure vessel and a carbon dioxide coolant, the carbon dioxide coolant is sealed in the pressure vessel, and a heat exchange channel is arranged on the pressure vessel It is connected with the suction pipe; the heat exchange channel is a copper pipe, and the metal pipe runs through the middle of the pressure vessel, and a sealing device is provided at the entrance and exit of the metal pipe and the pressure vessel; the metal pipe located in the pressure vessel is a spiral metal pipe. The utility model does not need to frequently replace the suction cooling device, and does not need to be equipped with supporting equipment such as a refrigerator. The utility model has a good cooling effect, reduces the user's operating procedures, wins more time for the fire-fighting work against which every second counts, and improves product reliability. sex.

Description

positive pressure oxygen respirator

technical field

The utility model relates to the technical field of lifesaving, in particular to a positive pressure oxygen respirator.

Background technique

Positive pressure oxygen breathing apparatus is mainly used for respiratory protection equipment equipped by firefighters when they are engaged in rescue work, so as to protect them from poisonous and harmful gases. It can also be used in petroleum, chemical, metallurgical underground engineering and other departments. Used in the prevention or treatment of toxic and harmful gas environment. Positive pressure oxygen respirators ensure that users can work as usual even in environments with low oxygen content or pollutants. Common positive pressure oxygen respirators usually include oxygen cylinders, airbags, inhalation cooling devices, inhalation tubes, inhalation valves, masks, exhalation valves, exhalation tubes, clean tanks, etc. When working, turn on the cylinder switch. Oxygen is continuously supplied to the breathing chamber after decompression. When the user inhales, the oxygen enters the mask from the breathing chamber through the cooling tank, the inhalation pipe and the inhalation valve. When exhaling, the gas passes through the exhalation valve, exhalation tube, enters the breathing chamber, mixes with the oxygen supplied by the quantitative hole, absorbs the CO2 in the exhaled breath through the clean tank, and then enters the breathing chamber to complete a cycle. During use, the cycle is repeated in turn. The excessively high temperature of the circulating gas brings great trouble to the user, because the high temperature of the gas will cause the user's discomfort and even cause symptoms such as vomiting. The inspiratory cooling device for positive pressure oxygen breathing reduces the temperature of the inhaled gas, reduces the fatigue of the user, and ensures the suitability of the inhaled gas temperature.

The most common inhalation cooling device uses a cooling bag in the cooling tank, and oxygen enters the mask from the breathing chamber through the cooling tank, inhalation pipe, and inhalation valve. At present, the cooling bag is equipped with cooling liquid such as water or blue water, and the cooling core is frozen before wearing. When wearing the respirator, the cylindrical cooling core is put into the respirator cooling tank. Such as the patent No. ZL200420015692.9 Chinese utility model patent discloses a 120 positive pressure oxygen respirator cooling and cleaning device, ZL20092010283.2 Chinese utility model patent discloses a warehouse type positive pressure oxygen respirator cooling device and the like. The suction cooling device of the above structure adopts ice cubes as the coolant of the circulating gas, and the cooling core is frozen before each use, and it can be used after being filled in advance. However, in actual product use, because ice cubes will melt rapidly when exposed to high temperatures, users with this equipment must also be equipped with refrigerators and other supporting equipment for ice cube production. Not to mention the increase in investment will greatly affect the convenience of use. The ice cubes and melted water must be cleared after finishing. In addition, because the cooling tank is placed outside the breathing chamber, this structure makes the respirator larger in size and has more external pipeline connections. Improper operation will easily affect the sealing and use time.

For example, the patent No. ZL00266576.X Chinese Utility Model Patent discloses an improvement in the structure of the oxygen breathing gas cooling system, which is characterized in that the cooling bag is installed in the cooling tank, the cooling bag is made of special packaging paper, and the cooling bag is equipped with high water absorption The cooling bag expands after being soaked in water. At this time, the cooling bag has a cooling function, and it is put into the cooling tank to achieve the purpose of cooling. When this method wears the respirator, the superabsorbent resin in the cooling bag is soaked in water, and the cooling bag expands, and then is packed into the respirator cooling tank. The cooling effect of this method is relatively poor, and is not adopted in the positive pressure oxygen respirator of actual application. Exist in use before the coolant in the cooling bag is processed and then installed, inconvenient to use, and bring a lot of trouble to the fire-fighting work that counts against every second.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies, and provide a positive pressure oxygen respirator, which does not need to frequently replace the suction cooling device, and does not need to be equipped with supporting equipment such as a refrigerator. more time.

The technical solution adopted for the technical problem solved by the utility model is: a positive pressure oxygen respirator, comprising an oxygen bottle, an air-breathing cooling device, and an air-breathing pipe, characterized in that the air-breathing cooling device includes a pressure vessel and a carbon dioxide coolant, The carbon dioxide coolant is sealed in the pressure vessel, and the pressure vessel is provided with a heat exchange channel connected with the suction pipe. Carbon dioxide coolant is solid carbon dioxide, usually in the form of lumps, which absorbs heat and sublimates into a gaseous state at -78.5°C, and is mainly used as a coolant. Carbon dioxide cooling can be carbon dioxide mixed with certain liquids to produce low temperatures at standard atmospheric pressure. Such as: carbon dioxide mixed with diethylene glycol diethyl ether, ethyl chloride, ethanol, phosphorus trichloride, chloroform, ether, trichloroethylene and acetone, etc., can produce different low temperatures under standard atmospheric pressure for cooling.

In the utility model, the carbon dioxide coolant is loaded into the pressure vessel, the gas flows through the heat exchange channel on the pressure vessel, and the carbon dioxide coolant is used to forcibly cool the gas flowing through the heat exchange channel, so that the effect of cooling the circulating gas is improved. Product usability. Compared with the prior art, the utility model has greatly improved cooling effect, does not need to repeatedly charge and take ice cubes before each use of the positive pressure oxygen respirator, reduces the investment in supporting refrigeration equipment such as refrigerators, and wins for fire protection and other work It takes time, because the positive pressure oxygen respirator with carbon dioxide coolant technology can extend the time for replacing the coolant to 5-10 years or even longer, and there is no need to fill ice cubes before each use and melt the ice cubes after use Afterwards the water is cleaned up. The utility model also does not exist problems such as improper operation prior to the technology, which easily affects sealing and service time. The utility model is convenient to operate and use, reduces user operation procedures, and also greatly improves the practicability and reliability of the product.

Preferably, the above-mentioned heat exchange channel is a metal tube, the metal tube runs through the middle of the pressure vessel, and a sealing device is provided at the entrance and exit of the metal tube and the pressure vessel. There is a sealing device at the entrance and exit of the metal pipe and the pressure vessel to prevent the leakage of the coolant, and the carbon dioxide coolant is used to forcibly cool the passing gas, thereby achieving the effect of cooling the circulating gas and improving the practicability of the product.

Preferably, the metal pipe inside the pressure vessel is a spiral metal pipe. On the one hand, the spiral metal tube ensures that the breathed oxygen is cooled enough in the heat exchange channel in the pressure vessel to prevent insufficient supply of cooled oxygen; on the other hand, the spiral metal tube increases the heat exchange area , which improves the cooling effect.

Preferably, the pressure vessel is provided with a valve for filling carbon dioxide coolant.

During specific implementation, it also includes a casing, an air bag, a mask, an exhalation tube and a clean tank, and the oxygen cylinder, the air bag, the suction cooling device and the clean tank are located in the casing. When the oxygen cylinder is opened, the high-pressure gas is decompressed into a medium-pressure gas through a pressure reducer. The medium-pressure gas passes through the demand valve one way, and the other gas flows into the low-pressure system through the quantitative hole; the low-pressure gas in the airbag passes through the suction cooling device, suction pipe, and suction valve to the mask, and the gas exhaled by the person in the mask passes through the exhalation Valve, exhalation tube, cleaning tank to air bag.

The beneficial effects of the utility model are: the utility model does not need to frequently replace the suction cooling device, and does not need to be equipped with supporting equipment such as a refrigerator. More time, improve product reliability.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a schematic structural view of the suction air cooling device of the embodiment of the present invention.

In the figure: 1. Box 2. Inhalation cooling device 3. Oxygen cylinder 4. Clean tank 5. Air bag 6. Mask 7. Inhalation pipe 8. Exhalation pipe 21. Pressure vessel 22. Carbon dioxide cooling 23. Copper pipe.

Detailed ways

Below according to Fig. 1 and Fig. 2, the utility model embodiment is stated.

Example

In Fig. 1 and Fig. 2, a positive pressure oxygen respirator includes a box body 1, an inspiratory cooling device 2, an oxygen cylinder 3, an airbag 5, a mask 6, an inhalation tube 7, an exhalation tube 8 and a clean tank 4 , Inhalation cooling device 2, oxygen bottle 3, air bag 5 and clean tank 4 are positioned at casing, and above-mentioned structure and prior art basic casing, the utility model implementation example does not narrate its connection situation. As shown in FIG. 2 , the suction cooling device 2 includes a pressure vessel 21 and a carbon dioxide coolant 22 . The carbon dioxide coolant 22 is sealed in the pressure vessel 21 . The pressure vessel 21 is provided with a heat exchange channel connected to the suction pipe 7 . The heat exchange channel is a copper tube 23, and the copper tube 23 runs through the middle of the pressure vessel 21. A sealing device is provided at the entrance and exit of the copper tube 23 and the pressure vessel 21, and the copper tube 23 located in the pressure vessel 21 is a spiral copper tube. The pressure vessel 2 is provided with a valve for filling the carbon dioxide coolant 22, and the valve for filling the carbon dioxide coolant 22 is disclosed in the prior art, and will not be described here.

The main working principle of the utility model embodiment is the same as the positive pressure oxygen respirator of the prior art. When the oxygen cylinder 3 is opened, the high-pressure gas is decompressed by the pressure reducer to become a medium-pressure gas, one path of the medium-pressure gas passes through the demand valve, and the other path of gas flows into the low-pressure system through the quantitative hole. When the human body is in moderate labor intensity, the oxygen demand of the human body is met through quantitative oxygen supply. As the labor intensity of the human body increases, when the pressure in the airbag reaches the opening pressure of the demand valve, the spring pressure plate contacts the demand valve to open the demand valve, and the medium-pressure gas fills the airbag 5 with oxygen through the demand valve to meet the oxygen demand of the human body. . The positive pressure in the system is formed by relying on the spring pressure plate to compress the air bag 5 and the effective oxygen supply of the demand valve, so that the positive pressure is always maintained in the respiratory system. The low-pressure gas in the airbag 5 passes through the inhalation cooling device 2, the inhalation pipe 7, and the inhalation valve to the mask 6, and the gas exhaled by the person in the mask 6 passes through the exhalation valve, the exhalation pipe 8, and the clean tank 4 to the airbag 5; When the exhaled gas gradually increases, the positive pressure spring is compressed. At the same time, the position of the spring pressing plate rises gradually. When the pressure in the breathing system reaches the specified pressure, the valve plate of the exhaust valve is pushed open by the spring pressure plate. At this time, the exhaust valve starts to exhaust; when the human breathing volume changes from a certain range, the breathing pressure is always automatically adjusted by the demand valve and the exhaust valve.

The carbon dioxide coolant of the utility model is solid carbon dioxide, usually in the form of a block, which absorbs heat and sublimates into a gaseous state at -78.5°C, and is mainly used as a coolant. Carbon dioxide cooling can be carbon dioxide mixed with certain liquids to produce low temperatures at standard atmospheric pressure. Such as: carbon dioxide mixed with diethylene glycol diethyl ether, ethyl chloride, ethanol, phosphorus trichloride, chloroform, ether, trichloroethylene and acetone, etc., can produce different low temperatures under standard atmospheric pressure for cooling.

The utility model puts the carbon dioxide coolant 22 into the pressure vessel 21, the gas flows through the spiral copper tube 23 on the pressure vessel 21, and the carbon dioxide coolant 22 is used to forcibly cool the gas flowing through the copper tube 23, thereby achieving The effect of cooling the circulating air increases the usability of the product. The helical copper tube 23 located in the pressure vessel 21 ensures on the one hand that the breathed oxygen has a sufficient amount of cooling on the heat exchange channel in the pressure vessel 21 to prevent insufficient supply of cooled oxygen; on the other hand, the helical The shaped copper tube 23 increases the heat exchange area and improves the cooling effect. Compared with the prior art, the utility model has greatly improved cooling effect, does not need to repeatedly charge and take ice cubes before each use of the positive pressure oxygen respirator, reduces the investment in supporting refrigeration equipment such as refrigerators, and wins for fire protection and other work It takes time, because the positive pressure oxygen respirator with carbon dioxide coolant 22 technology can extend the time for replacing the coolant to 5-10 years or even longer, and there is no need to fill ice cubes before each use and then use ice cubes after use The melted water is cleaned up. The utility model also does not exist problems such as improper operation prior to the technology, which easily affects sealing and service time. The utility model is convenient to operate and use, reduces user operation procedures, and also greatly improves the practicability and reliability of the product.

Claims (5)

1. A positive pressure oxygen respirator, comprising an oxygen cylinder, an air-breathing cooling device, and an air-breathing tube, characterized in that the air-breathing cooling device comprises a pressure vessel and a carbon dioxide coolant, and the carbon dioxide coolant is sealed in the pressure vessel, and on the pressure vessel A heat exchange channel is provided to connect with the suction pipe. 2. A positive pressure oxygen respirator according to claim 1, characterized in that the above-mentioned heat exchange channel is a metal tube, the metal tube runs through the middle of the pressure vessel, and a sealing device is provided at the entrance and exit of the metal tube and the pressure vessel . 3. A positive pressure oxygen respirator according to claim 2, characterized in that the metal tube located in the pressure vessel is a spiral metal tube. 4. A positive pressure oxygen respirator according to claim 1, 2 or 3, characterized in that said pressure vessel is provided with a valve for filling carbon dioxide coolant. 5. A positive pressure oxygen respirator according to claim 1, 2 or 3, characterized in that it also includes a casing, an air bag, a face mask, an exhalation tube and a clean tank, an oxygen cylinder, an air bag, an inspiratory cooling device and The cleaning tank is located in the box body.

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