Mixer and vaporization apparatus

A vaporization apparatus that vaporizes fluid to produce vaporized gas, the vaporization apparatus comprising:

• a depressurization flow path configured to depressurize and atomize a gas-liquid mixture introduced therein;
• a mixer, arranged downstream of the depressurization flow path, comprising:
• a flow path forming member formed with an internal flow path;
• and
• an insertion member inserted into the internal flow path, wherein
• an inner circumferential surface forming the internal flow path in the flow path forming member or an outer circumferential surface of the insertion member is formed with a first groove and a second groove merging with the first groove and branching from the first groove, and the inner circumferential surface and the outer circumferential surface are fitted to each other;
• the first groove and the second groove are formed as a mixing flow path for, between the flow path forming member and the insertion member, branching and merging the fluid flowing from one side of the internal flow path and guiding the fluid to the other side of the internal flow path;
• a direction of the gas-liquid mixture traveling through the depressurization flow path and into the mixer is axial with respect to the insertion member;
• the insertion member has a guide surface on its upstream side which gradually tapers towards an upstream direction;
• and
• an upstream side opening of the first groove and an upstream side opening of the second groove respectively overlap each other.