The utility model relates to an air valve for an air needle of a nasogastric tube.The main structure includes a feeding guide element,Air blocking and anti reverse element,Thermochromic element,Food storage elements and nasogastric tubes,Among them,The air blocking and anti reverse elements are connected with the feeding guide elements.And the temperature sensing and color changing element is arranged on the path where the filling guide element is connected with the air blocking and anti inversion element.And the food storage element is connected with the gas blocking and reverse preventing element.The nasogastric tube is connected with a gas blocking and inversion preventing element.In this way,When the food enters from the filling guide element, the air blocking and inversion preventing element will be used to isolate the air.Prevent air from entering the stomach.And when the food passes through the thermochromic element,Knowing the temperature of the food,And if the temperature is too high,It may be temporarily housed in a food storage element for cooling.Wait until the proper temperature is reached, and then enter the stomach through the nasogastric tube.It can not only prevent air from entering the stomach.It has the advantage of good operation.本新型為有關一種鼻胃管空針空氣閥，主要結構包括灌食導引元件、阻氣防逆元件、感溫變色元件、食品儲存元件及鼻胃管，其中，阻氣防逆元件與灌食導引元件連結，且感溫變色元件設於灌食導引元件連接該阻氣防逆元件之路徑上，又食品儲存元件與該阻氣防逆元件連結，而鼻胃管與阻氣防逆元件連結；藉此，食物由灌食導引元件進入時會利用阻氣防逆元件以隔絕空氣，防止空氣進入病患胃內，並且當食物通過感溫變色元件時，得知食物的溫度，且若溫度過高，則可先暫時收容於食品儲存元件讓其降溫，等待達適合溫度再由鼻胃管進入胃內，達到不但能防止空氣進入胃內，更具有好操作之優勢。
