System having a pre-separation unit

Patent metadata

Field	Value
Publication number	US-11906464-B2
Application number	US-202117528306-A
Country	US
Kind code	B2
Filing date	Nov 17, 2021
Priority date	Sep 8, 2016
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

There is provided a system (1) including a monitoring unit (50) that analyzes, using a sensor (51), components of a first gas which may include first components and a pre-separation unit (30) disposed upstream of the monitoring unit. The pre-separation unit includes a first supply line (31) that supplies the first gas (35) to the monitoring unit; a second supply line (32) that supplies a second gas (36), which includes components obtained by removing the first components from the first gas using a first separator (40), to the monitoring unit; and an automatic valve station (38) that periodically switches between the first supply line and the second supply line to alternately supply the first gas and the second gas to the monitoring unit.

First claim

The invention claimed is:

1. A lyophilization system comprising:
a chamber that is configured to freeze dry a product;
a vacuum unit that is configured to place the chamber at a negative pressure;
a gas supplying unit that is configured to supply a gas for pressurization purposes to the chamber;
a line that is configured to supply at least a part of exhaust gas from the chamber to a sensor for gas analyzing; and
a system controller that is configured to monitor an amount of moisture in the exhaust gas using the sensor, and to measure an end point of freeze-drying process performed in the chamber by a ratio of the amount of moisture to a flow rate of the gas for pressurization purposes to the chamber.

2. The lyophilization system according to claim 1 , wherein the system controller is further configured to proceed:
a primary drying at a lower temperature after a freezing; and
a secondary drying at a higher temperature, wherein the system controller dynamically changes a processing time at which a predetermined temperature is maintained according to a change of the amount of moisture in time.

3. A control method of a lyophilization system that includes:
a chamber for freeze drying a product;
a vacuum unit for placing the chamber at a negative pressure;
a gas supplying unit for supplying a gas for pressurization purposes to the chamber;
a line for supplying at least a part of exhaust gas from the chamber to a sensor for gas analyzing; and
a system controller,
the control method comprising monitoring, by the system controller, an amount of moisture in the exhaust gas using the sensor and measuring, by the system controller, an end point of freeze-drying process performed in the chamber by a ratio of the amount of moisture to a flow rate of the gas for pressurization purposes to the chamber.

4. The control method according to claim 3 , further comprising:
primary drying at a lower temperature after a freezing; and
secondary drying at a higher temperature, wherein the system controller dynamically changes a processing time at which a predetermined temperature is maintained according to a change of the amount of moisture in time.

5. A non-transitory computer readable medium storing a program product configured to be performed by a system controller of a lyophilization system that includes:
a chamber for freeze drying a product;
a vacuum unit for placing the chamber at a negative pressure;
a gas supplying unit for supplying a gas for pressurization purposes to the chamber; and
a line for supplying at least a part of exhaust gas from the chamber to a sensor for gas analyzing,
the program product, when executed, causes the system controller to perform a process of monitoring an amount of moisture in the exhaust gas using the sensor and measuring an end point of freeze-drying process performed in the chamber by a ratio of the amount of moisture to a flow rate of the gas for pressurization purposes to the chamber.

6. A control method of a lyophilization system that includes:
a chamber for freeze drying a product;
a vacuum unit for placing the chamber at a negative pressure;
a gas supplying unit for supplying a gas for pressurization purposes to the chamber;
a line for supplying at least a part of exhaust gas from the chamber to a sensor for gas analyzing; and
a system controller,
the control method comprising measuring, by the system controller, an end point of freeze-drying process performed in the chamber by monitoring an amount of moisture in the exhaust gas using the sensor;
primary drying at a lower temperature after a freezing; and
secondary drying at a higher temperature, wherein the system controller dynamically changes a processing time at which a predetermined temperature is maintained according to a change of the amount of moisture in time.

Assignees

• Atonarp Inc

Inventors

• Murthy Prakash Sreedhar
• Boumsellek Said

Classifications

• G01N27/62 Primary

  by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode · CPC title

• F26B5/10

  the process involving freezing · CPC title

• G01N1/00

  Sampling; Preparing specimens for investigation · CPC title

• G01N1/22

  in the gaseous state {(specially adapted for biological material G01N33/497; measuring breath flow A61B5/087)} · CPC title

• G01N33/0014 Primary

  by eliminating a gas (by a chemical reaction G01N33/0013; a chemical reaction taking place or a gas being eliminated in one or more analysing channels G01N33/0024) · CPC title