DISPENSING SYSTEM AND JUDGING METHOD OF DISCHARGE CONDITION THEREOF

• US 20090071242A1
• Filed: 09/17/2008
• Published: 03/19/2009
• Est. Priority Date: 09/19/2007
• Status: Abandoned Application

• Current Assignee: WAKO Pure Chemical Industries Limited (Fujifilm Holdings Corporation)
• Original Assignee: WAKO Pure Chemical Industries Limited (Fujifilm Holdings Corporation)
• Inventors: HIGUCHI, Akira
• Application Number:
  US12/211,967
• Publication Number:
  US 20090071242A1
• Time in Patent Office: Days
• US Class Current: 73/196
• CPC Class Codes: G01F 25/0092 for metering by volume

Abstract

When a discharge trouble such as clogging has occurred in a plurality of branch tubes branched from a flow tube coupled with a pressure vessel, it is displayed immediately as a flow rate variation in the flow tube. A Judgment section of a dispensing system, therefore, finds the discharge trouble in the branch tubes immediately based on a flow rate detected by a flow-rate detector provided on the flow tube. Moreover, the judgment section identifies the branch tubes where the discharge trouble has occurred based on the respective flow rates of the branch tubes opened individually or opened in a predetermined combination.

Claims

1. A dispensing system comprising:

a first flow path coupled with a liquid supply source;

a flow-rate detector provided on the first flow path;

a branch section branching the first flow path;

N pieces of second flow paths, branched from the first flow path in the branch section, each of the second flow paths having a discharge head for a liquid at an end thereof;

N pieces of valves capable of opening and closing the N pieces of second flow paths individually;

a first flow-rate calculator configured to detect a flow rate of the liquid by the flow-rate detector under a condition in which all the valves are open;

a first judgment section configured to judge a discharge condition of the liquid by comparing the flow rate detected by the flow-rate detector with a setting flow rate conducted from a total flow rate to be discharged from all the discharge heads;

a second flow-rate calculator configured to detect respective flow rates of the liquid by the flow-rate detector under conditions that, when the N pieces of the second flow paths are divided into N pieces of groups each having a same number of at least one and at most (N−

1) pieces of the second flow paths, one or more of the valves corresponding to the second flow paths included in each of the groups are open; and

a second judgment section configured to identify any of the second flow paths that are clogged or have possibility of being clogged based on the respective flow rates of the groups of the second flow paths detected by the second flow-rate calculator.

2. A judging method for a discharging condition in a dispensing system, the dispensing system comprising a first flow path coupled with a liquid supply source, a branch section branching the first flow path, N pieces of second flow paths, branched from the first flow path in the branch section, each of the second flow paths having a discharge head for a liquid at an end thereof;

and N pieces of valves capable of opening and closing the N pieces of second flow paths individually;

the judging method comprising;

detecting a flow rate of the liquid under a condition in which all the valves are open;

judging a discharge condition by comparing a detected flow rate with a setting flow rate conducted from a total flow rate to be discharged from all the discharge heads;

detecting respective flow rates of the liquid under conditions that, when the N pieces of the second flow paths are divided into N pieces of groups each having a same number of at least one and at most (N−

1) pieces of the second flow paths, one or more of the valves corresponding to the second flow paths included in each of the groups are open; and

identifying any of the second flow paths that are clogged or have possibility of being clogged based on the respective detected flow rates of the each group of the second flow paths.

3. A dispensing system comprising:

a first flow path coupled with a liquid supply source;

a flow-rate detector provided on the first flow path;

a branch section branching the first flow path;

N pieces of second flow paths, branched from the first flow path in the branch section, each of the second flow paths having a discharge head for a liquid at an end thereof;

N pieces of valves capable of opening and closing the N pieces of second flow paths individually;

one of a counter and a timer, the counter configured to count a number of times for dispensing operation and the timer configured to measure an operation period of time for dispensing;

a flow-rate calculator configured to detect respective flow rates of the liquid by the flow-rate detector under conditions that, when the N pieces of the second flow paths are divided into N pieces of groups each having a same number of at least one and at most (N−

1) pieces of the second flow paths, one or more of the valves corresponding to the second flow paths included in each of the groups are open, at a time that the counter shows more than a predetermined number of times of dispensing operation or the timer shows a longer period of time than a predetermined period of time for dispensing; and

a judgment section configured to identify any of the second flow paths that are clogged or have possibility of being clogged based on the respective flow rates of the groups of the second flow paths detected by the flow-rate calculator.

4. A judging method for a discharging condition in a dispensing system, the dispensing system comprising a first flow path coupled with a liquid supply source, a branch section branching the first flow path, N pieces of second flow paths, branched from the first flow path in the branch section, each of the second flow paths having a discharge head for a liquid at an end thereof;

and N pieces of valves capable of opening and closing the N pieces of second flow paths individually;

the judging method comprising;

detecting respective flow rates of the liquid by the flow-rate detector under conditions that, when the N pieces of the second flow paths are divided into N pieces of groups each having a same number of at least one and at most (N−

1) pieces of the second flow paths, one or more of the valves corresponding to the second flow paths included in each of the groups are open, at a time that the counter shows more than a predetermined number of times of dispensing operation or the timer shows a longer period of time than a predetermined period of time for dispensing; and

identifying any of the second flow paths that are clogged or have possibility of being clogged based on the detected respective flow rates of the groups of the second flow path.