Abstract: A hygrometer includes a heat transfer section extending from a measurement space toward an outside space separated from the measurement space, a heat release amount control unit that causes heat to be released to the outside space from the heat transfer section such that an amount of heat released to the outside space is made constant, and a computation device that calculates a humidity of the measurement space. The computation device calculates the humidity from a heat transfer section temperature and a measurement space temperature using a relational expression based on a heat balance in the heat transfer section when condensation is occurring in a portion, of the heat transfer section, located within the measurement space in a state where the amount of heat released to the outside space from the heat transfer section is made constant by the heat release amount control unit.

Abstract: A humidity control apparatus has a humidity control apparatus having a humidifying part for humidifying air and a dehumidifying part for dehumidifying to control humidity of a humidity control space. The dehumidifying part has: a main body part that is configured to encapsulate a working fluid therein and to cause a heat-pipe phenomenon. A heat-insulating part fits externally to the main body part and a heat absorption part absorbs heat from a base side part located on one side of the main body part in relation to the heat-insulating part and thereby condenses the working fluid that evaporated into gas in a front side part located on the other side of the main body part in relation to the heat-insulating part. The dehumidifying part dehumidifies the air by means of the front side part of the main body part where the working fluid in liquid form evaporates.

Abstract: A humidity control apparatus has a humidity control apparatus having a humidifying part for humidifying air and a dehumidifying part for dehumidifying to control humidity of a humidity control space. The dehumidifying part has: a main body part that is configured to encapsulate a working fluid therein and to cause a heat-pipe phenomenon. A heat-insulating part fits externally to the main body part and a heat absorption part absorbs heat from a base side part located on one side of the main body part in relation to the heat-insulating part and thereby condenses the working fluid that evaporated into gas in a front side part located on the other side of the main body part in relation to the heat-insulating part. The dehumidifying part dehumidifies the air by means of the front side part of the main body part where the working fluid in liquid form evaporates.

Abstract: A hygrometer and dew-point instrument is provided that is structurally simple while reducing the workload during maintenance. The hygrometer measures relative humidity of a measurement space, and has a main body that encapsulates a working fluid therein and causes a heat-pipe phenomenon. The main body is disposed across the measurement space and an external space spaced from the measurement space by a heat-insulating part and has a temperature lower than the measurement space. A first temperature deriving part derives the temperature of the main body in a section where the working fluid evaporates. A space temperature detecting unit detects the temperature of the measurement space. A computation unit calculate relative humidity of the measurement space based on the temperature of the main body derived by the first temperature deriving part and the temperature of the measurement space detected by the space temperature detecting unit.

Abstract: A method for drying an electrode pair is disclosed. In at least one embodiment, the method includes preparing a positive electrode by applying a positive electrode material to a current collector; preparing a negative electrode by applying a negative electrode material to a current collector; preparing one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or preparing sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order; accommodating the electrode pair(s) in a container; and drying the container in which the electrode pair(s) has been accommodated by use of the freeze-drying method.

Abstract: An apparatus for environmental tests includes a chamber having formed therein a test space for disposing a sample, and a tray that is provided on the upper surface of the chamber and has an open upper surface. A front wall of the tray is configured by an operation unit where switches are provided. A rear wall of the tray is configured by a control unit housing a control substrate. A left wall and a right wall of the tray are configured by hollow bodies connecting the operation unit and the control unit. The tray is covered with a lid.

Abstract: Provided is a power cycle test apparatus that eliminates the need to measure a thermal resistance in a power cycle test and that pursues power saving in the evaluation of IGBT reliability by exactly applying a required thermal stress through the automatic adjustment of a stress current. The power cycle test apparatus performs a power cycle test for an IGBT to be tested by applying a thermal stress to the IGBT to be tested through the intermittent application of a stress current thereto. The apparatus applies the stress current to the IGBT to be tested and thereafter applies a current for measurement to the IGBT to be tested to measure a collector-emitter voltage of the IGBT to be tested. The apparatus further obtains a junction temperature of the IGBT to be tested from the measured collector-emitter voltage and a temperature coefficient of the IGBT to be tested.

Abstract: Provided are a power cycle test apparatus and a power cycle test method that can efficiently reproduce nearly a level of stress that may occur in failure mode in actual environments, the apparatus which is a test apparatus for performing a power cycle test for a power semiconductor device to be tested by applying a thermal stress to the power semiconductor device through the application of a stress current thereto in predefined ON/OFF cycles executes a thermal cycle test in temperature rise-fall cycles longer than the ON/OFF cycles by using an apparatus configured to change an external environmental temperature and further executes the power cycle test while executing the thermal cycle test in synchronization with execution phases of the thermal cycle test.

Abstract: An environmental chamber includes a testing tub in which a testing space is formed. The testing tub has a front wall, a left sidewall, a right sidewall, a rear wall, and a ceiling part, and is divided into a lower tub part and an upper tub part by a dividing surface extended in a direction inclined downwardly and frontwardly. The left and right sidewalls are respectively divided into two portions by the dividing surface. An inner surface of the upper tub part includes at least a part of an inner surface of each of the ceiling part, the front wall, the left sidewall, and the right sidewall. The upper tub part is supported by the lower tub part to be able to open the testing space.

Abstract: A method for drying an electrode pair is disclosed. In at least one embodiment, the method includes preparing a positive electrode by applying a positive electrode material to a current collector; preparing a negative electrode by applying a negative electrode material to a current collector; preparing one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or preparing sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order; accommodating the electrode pair(s) in a container; and drying the container in which the electrode pair(s) has been accommodated by use of the freeze-drying method.

Abstract: An apparatus for environmental tests includes a chamber having formed therein a test space for disposing a sample, and a tray that is provided on the upper surface of the chamber and has an open upper surface. A front wall of the tray is configured by an operation unit where switches are provided. A rear wall of the tray is configured by a control unit housing a control substrate. A left wall and a right wall of the tray are configured by hollow bodies connecting the operation unit and the control unit. The tray is covered with a lid.

Abstract: A humidity control apparatus has a humidity control apparatus having a humidifying part for humidifying air and a dehumidifying part for dehumidifying to control humidity of a humidity control space. The dehumidifying part has: a main body part that is configured to encapsulate a working fluid therein and to cause a heat-pipe phenomenon. A heat-insulating part fits externally to the main body part and a heat absorption part absorbs heat from a base side part located on one side of the main body part in relation to the heat-insulating part and thereby condenses the working fluid that evaporated into gas in a front side part located on the other side of the main body part in relation to the heat-insulating part. The dehumidifying part dehumidifies the air by means of the front side part of the main body part where the working fluid in liquid form evaporates.

Abstract: A hygrometer and dew-point instrument is provided that is structurally simple while reducing the workload during maintenance. The hygrometer measures relative humidity of a measurement space, and has a main body that encapsulates a working fluid therein and causes a heat-pipe phenomenon. The main body is disposed across the measurement space and an external space spaced from the measurement space by a heat-insulating part and has a temperature lower than the measurement space. A first temperature deriving part derives the temperature of the main body in a section where the working fluid evaporates. A space temperature detecting unit detects the temperature of the measurement space. A computation unit calculate relative humidity of the measurement space based on the temperature of the main body derived by the first temperature deriving part and the temperature of the measurement space detected by the space temperature detecting unit.

Abstract: A dew formation testing device has an adjustment tank capable of adjusting the temperature and humidity of air to predetermined temperature and humidity, a testing tank installed separately from the adjustment tank and having a sample base that has a mounting surface, onto which a testing sample W can be placed, and that is capable to cool the mounting surface, and ducts that link the adjustment unit and the testing tank. The testing tank is provided with an air guide member that, when air flowing into the testing tank through the duct flows onto the sample base from a side of the sample base, guides the air in the direction tilted downward at a predetermined angle, the guidance being performed at a position right above the sample base at an end thereof which is on the upstream side of the air flow.

Abstract: An environmental chamber includes a testing tub in which a testing space is formed. The testing tub has a front wall, a left sidewall, a right sidewall, a rear wall, and a ceiling part, and is divided into a lower tub part and an upper tub part by a dividing surface extended in a direction inclined downwardly and frontwardly. The left and right sidewalls are respectively divided into two portions by the dividing surface. An inner surface of the upper tub part includes at least a part of an inner surface of each of the ceiling part, the front wall, the left sidewall, and the right sidewall. The upper tub part is supported by the lower tub part to be able to open the testing space.