A check valve on a sub-machine of a soda fountain includes a main body of the sub-machine and an air nozzle rod, where the air nozzle rod is connected to the main body, the main body is provided with an internal thread cavity with a lower opening and an air inlet channel communicated with the internal thread cavity, and the air nozzle rod is provided with a check valve cavity with an external thread; the check valve further includes a check valve assembly, the check valve assembly is arranged in the check valve cavity, and the check valve cavity is screwed and hermetically sealed with the internal thread cavity. Such a structure can prevent air flow from flowing back and improve the sealing performance is improved, and is convenient to assemble.

You do not currently have access to this content.