二氧化碳灭火器原理是在加压时将液态二氧化碳压缩在小钢瓶中，灭火时再将其喷出，有降温和隔绝空气的作用。灭火器的区分不是根据瓶身的颜色，而是根据充装的灭火剂进行区分。当然如果您在使用灭火器时操作不当，那就会有隐患发生。

The principle of the carbon dioxide fire extinguisher is to compress the liquid carbon dioxide into a small steel cylinder when pressurized, and then spray it out when extinguishing the fire. It has the effect of cooling and isolating air. The distinction of fire extinguishers is not based on the color of the bottle, but on the filled extinguishing agent. Of course, if you do not operate the fire extinguisher properly, there will be potential safety hazards.

二氧化碳灭火器使用不当会冻伤手吗？会的，因为干冰(固态二氧化碳)在气化的时候会大量吸热，造成局部低温。在常压下，液态的二氧化碳会立即汽化，一般1kg的液态二氧化碳可产生约0.5立方米的气体。

Will the hands be frostbitten if the carbon dioxide fire extinguisher is not used properly? Yes, because dry ice (solid carbon dioxide) will absorb a lot of heat during gasification, causing local low temperature. Under normal pressure, the liquid carbon dioxide will vaporize immediately. Generally, 1kg of liquid carbon dioxide can produce about 0.5m3 of gas.

因而，灭火时，二氧化碳气体可以排除空气而包围在燃烧物体的表面或分布于较密闭的空间中，降低可燃物周围或防护空间内的氧浓度，产生窒息作用而灭火。另外，二氧化碳从储存容器中喷出时，会由液体迅速汽化成气体，而从周围吸收部分热量，起到冷却的作用。

Therefore, when extinguishing a fire, the carbon dioxide gas can remove the air and surround the surface of the burning object or distribute in a relatively closed space, reduce the oxygen concentration around the combustible or in the protective space, and produce asphyxiation to extinguish the fire. In addition, when carbon dioxide is ejected from the storage container, it will quickly vaporize from the liquid into gas, and absorb part of the heat from the surrounding area to play a cooling role.

正确使用方法是拔出保险销,一手握住喇叭筒根部的手柄,一般是木质手柄,而另一只手紧握启闭阀的压把;对没有喷射软管的二氧化碳灭火器,应把喇叭筒往上板70-90度;那么还要注意,在使用时,不能直接用手抓住喇叭筒外壁或金属连线管,以防止手被冻伤。

The correct use method is to pull out the safety pin, hold the handle at the root of the horn with one hand, which is generally a wooden handle, and hold the pressure handle of the opening and closing valve tightly with the other hand; For carbon dioxide fire extinguishers without spray hose, the horn shall be 70-90 degrees upward; It should also be noted that during use, do not directly grasp the external wall of the horn or the metal connecting pipe with your hands to prevent frostbite.

此外川消提醒您，正常保存和使用灭火器可避免灭火器发生爆炸。如二氧化碳、卤代烷、贮压式干粉灭火器不存放在高温的地方；使用过的灭火器严禁私自填装，应及时送到具有维修资格的单位重新灌装。

In addition, Chuanxiao reminds you that the normal storage and use of fire extinguishers can avoid the explosion of fire extinguishers. For example, carbon dioxide, halogenated alkanes and pressure storage dry powder fire extinguishers shall not be stored in high temperature places; Used fire extinguishers shall not be filled without permission. They shall be sent to units with maintenance qualification for refilling.

灭火器锈蚀严重或者筒体变形及达到报废的年限时，不能再使用，应立即送维修单位处理；其次，严禁将灭火器做废铁卖出，对报废的灭火器应按压力容器的管理规定，在筒体上打孔后，交由单位处理；另外，在搬动灭火的过程中应轻拿轻放，以免发生碰撞变形引发爆炸。另外，灭火器是否超期服役、是否合格、存放环境是否等也是重要因素。

When the fire extinguisher is seriously rusted or the cylinder is deformed and reaches the scrap life, it can no longer be used, and it shall be immediately sent to the maintenance unit for treatment; Secondly, it is strictly prohibited to sell the fire extinguishers as scrap iron. The discarded fire extinguishers shall be drilled on the cylinder according to the management regulations of pressure vessels, and then handed over to professional units for disposal; In addition, handle with care in the process of moving and extinguishing the fire, so as to avoid collision, deformation and explosion. In addition, whether the fire extinguisher is out of service, qualified or not, and whether the storage environment is safe are also important safety factors.

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