Elemental analysis device for analyzing test sample having cleaning gas supply mechanism

An elemental analysis device comprising:

• a heating furnace in which a test sample that is placed in a crucible is heated so that a sample gas is generated from the test sample;
• an inflow path through which a carrier gas is introduced into the heating furnace;
• an outflow path through which a mixture gas made up of the carrier gas and the sample gas is led out from the heating furnace;
• a dust filter that is provided on the outflow path;
• an analysis mechanism that is provided on the outflow path on a downstream side from the dust filter, and that detects one or a plurality of predetermined components contained in the mixture gas;
• and
• a cleaning gas supply mechanism that supplies cleaning gas to the dust filter in an opposite direction from a direction in which the mixture gas is flowing,
• wherein the heating furnace comprises:
• a first electrode;
• a second electrode that is formed so as to be able to move between a closed-furnace position where it sandwiches the crucible between itself and the first electrode, and an open-furnace position that is separated by a predetermined distance from the closed-furnace position;
• a drive mechanism that causes the second electrode to move between the closed-furnace position and the open-furnace position;
• a dust-suction flow path that opens in the interior of the heating furnace and is equipped with a dust-suction port that draws in dust;
• and
• an ejector that is equipped with an intake port that is connected to the heating furnace side of the dust-suction flow path, a discharge port that is connected to the discharge side of the dust-suction flow path, and a drive port to which a working fluid is supplied, and wherein,
• the drive mechanism is formed in such a way that, in a case in which the drive mechanism moves the second electrode from the closed-furnace position to the open-furnace position, the working fluid flows into the drive port of the ejector.

An elemental analysis device comprising:

• a heating furnace in which a test sample that is placed in a crucible is heated so that a sample gas is generated from the test sample;
• an inflow path through which a carrier gas is introduced into the heating furnace;
• an outflow path through which a mixture gas made up of the carrier gas and the sample gas is led out from the heating furnace;
• a dust filter that is provided on the outflow path;
• an analysis mechanism that is provided on the outflow path on a downstream side from the dust filter, and that detects one or a plurality of predetermined components contained in the mixture gas;
• and
• a cleaning gas supply mechanism that supplies cleaning gas to the dust filter in an opposite direction from a direction in which the mixture gas is flowing,
• wherein the heating furnace comprises:
• a first electrode;
• a second electrode that is formed so as to be able to move between a closed-furnace position where it sandwiches the crucible between itself and the first electrode, and an open-furnace position that is separated by a predetermined distance from the closed-furnace position;
• a drive mechanism that causes the second electrode to move between the closed-furnace position and the open-furnace position;
• a dust-suction flow path that opens in the interior of the heating furnace and is equipped with a dust-suction port that draws in dust;
• and
• an ejector that is equipped with an intake port that is connected to the heating furnace side of the dust-suction flow path, a discharge port that is connected to the discharge side of the dust-suction flow path, and a drive port to which a working fluid is supplied, and wherein,
• the cleaning gas supply mechanism is formed in such a way that, in a case in which the cleaning gas is flowing to the dust filter in an opposite direction from a direction in which the mixture gas is flowing, the working fluid flows into the drive port of the ejector.