Abstract: In order to accurately calculate an estimated flow rate by a dynamic constant volume method, a flow rate calculation system including a tank into which fluid flows, an inflow line through which the fluid flows into the tank, and a pressure sensor that detects the pressure inside the tank is adapted to include: a pressure change data storage part that stores pressure change data indicating a temporal change in the pressure detected by the pressure sensor during an inflow period; a flow rate calculation part that calculates the estimated flow rate during the inflow period based on a pressure change rate; and a flow rate correction part that, on the basis of first pressure detected by the pressure sensor after a predetermined time has elapsed after the inflow period and second pressure included in the pressure change data and higher than the first pressure, corrects the estimated flow rate.

Abstract: A mixer is adapted to include: a flow path forming member formed with an internal flow path; and an insertion member inserted into the internal flow path, in which: the inner circumferential surface forming the internal flow path in the flow path forming member or the 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; and 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 fluid flowing from one side of the internal flow path and guiding the fluid to the other side of the internal flow path.

Abstract: There is provided a control valve that is provided on a flow path along which flows a source fluid which is a liquid source or a source gas obtained by vaporizing a liquid source, a pressure sensor that is provided on a downstream side of the control valve, a flow rate sensor that measures a flow rate of the source fluid, and a valve controller that, while reducing a deviation between a set pressure and a measured pressure measured by the pressure sensor, controls the control valve such that a measured flow rate measured by the flow rate sensor is equal to or less than a limit flow rate which is a flow rate that is set based on an upper limit flow rate at which the liquid source can still be vaporized.

Abstract: In order to accurately calculate an estimated flow rate by a dynamic constant volume method, a flow rate calculation system including a tank into which fluid flows, an inflow line through which the fluid flows into the tank, and a pressure sensor that detects the pressure inside the tank is adapted to include: a pressure change data storage part that stores pressure change data indicating a temporal change in the pressure detected by the pressure sensor during an inflow period; a flow rate calculation part that calculates the estimated flow rate during the inflow period based on a pressure change rate; and a flow rate correction part that, on the basis of first pressure detected by the pressure sensor after a predetermined time has elapsed after the inflow period and second pressure included in the pressure change data and higher than the first pressure, corrects the estimated flow rate.

Abstract: A vaporizer includes a main body including a first body and a second body. The first body has an upper portion narrowing in a direction of a height of the first body and the second body has a cavity in which the first body is positioned. A mixing chamber is between the first and second bodies. The second body includes a carrier gas injection path connected to a carrier gas inlet formed in an upper portion of the mixing chamber. The carrier gas injection path carries a carrier gas. A source material injection path is connected to a source material inlet formed in the mixing chamber. The source material injection path carries a liquid source material. A discharge is connected to an outlet formed in a lower portion of the mixing chamber. A mixed fluid including the carrier gas and the liquid source material is discharged through the discharge path.

Abstract: A mixer is adapted to include: a flow path forming member formed with an internal flow path; and an insertion member inserted into the internal flow path, in which: the inner circumferential surface forming the internal flow path in the flow path forming member or the 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; and 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 fluid flowing from one side of the internal flow path and guiding the fluid to the other side of the internal flow path.

Abstract: A heating vaporization system provided with: a container that heats and vaporizes a source to produce source gas; a pipe for leading out the source gas; a sensor flow path that is provided in the pipe; a flow rate detecting part that is provided with a thermal type flow rate sensor provided in the sensor flow path, and measures a flow rate of the source gas flowing through the pipe; a flow rate regulating part that regulates the flow rate of the source gas flowing through the pipe located upstream of the flow rate detecting part; and a control part that uses a result of the detection by the flow rate detecting part to control the flow rate regulating part.

Abstract: A vaporizer includes a main body including a first body and a second body. The first body has an upper portion narrowing in a direction of a height of the first body and the second body has a cavity in which the first body is positioned. A mixing chamber is between the first and second bodies. The second body includes a carrier gas injection path connected to a carrier gas inlet formed in an upper portion of the mixing chamber. The carrier gas injection path carries a carrier gas. A source material injection path is connected to a source material inlet formed in the mixing chamber. The source material injection path carries a liquid source material. A discharge is connected to an outlet formed in a lower portion of the mixing chamber. A mixed fluid including the carrier gas and the liquid source material is discharged through the discharge path.

Abstract: A heating vaporization system provided with: a container that heats and vaporizes a source to produce source gas; a pipe for leading out the source gas; a sensor flow path that is provided in the pipe; a flow rate detecting part that is provided with a thermal type flow rate sensor provided in the sensor flow path, and measures a flow rate of the source gas flowing through the pipe; a flow rate regulating part that regulates the flow rate of the source gas flowing through the pipe located upstream of the flow rate detecting part; and a control part that uses a result of the detection by the flow rate detecting part to control the flow rate regulating part.