ESPEC Corporation

Utsunomiya-shi, Japan

ESPEC Corporation

Utsunomiya-shi, Japan
SEARCH FILTERS
Time filter
Source Type

Patent
Espec Corporation | Date: 2016-08-03

A system comprising: a chamber which is surrounded by a heat-insulating part; and a dew-point instrument for measuring a dew-point of a measurement space, the dew-point instrument comprising: a main body part configured by a heat pipe or a meandering capillary tube type heat pipe or an oscillating heat pipe, said main body part being configured to encapsulate a working fluid therein and to cause a heat-pipe phenomenon and is disposed across the measurement space and an external space that is spaced from the measurement space by the heat-insulating part and has a temperature lower than that of the measurement space; and first temperature deriving means configured to derive a temperature of the main body part in a section where the working fluid evaporates, said section where the working fluid evaporates corresponds to a part of the main body part which is inserted in the chamber; wherein the measurement space is a space inside the chamber which is surrounded by the heat-insulating part; wherein the external space is a space outside the chamber.


Patent
ESPEC Corporation | Date: 2013-03-06

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.


Patent
ESPEC Corporation | Date: 2013-07-17

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.


Patent
ESPEC Corporation | Date: 2014-03-31

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.


Patent
ESPEC Corporation | Date: 2014-09-02

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.


The dehumidifying efficiency of a dehumidifying part is improved while reducing the driving power. The humidity control apparatus is a humidity control apparatus having a humidifying part for humidifying air and a dehumidifying part for dehumidifying air, and for controlling a humidity of a humidity control space by means of the humidifying part and the dehumidifying part. The dehumidifying part has: a main body part that is configured to encapsulate a working fluid therein and to cause a heat-pipe phenomenon and is disposed across a dehumidifying space for dehumidifying air to be fed to the humidity control space and an external space that is spaced from the dehumidifying space by a heat-insulating part; and wherein the dehumidifying part dehumidifies air of the dehumidifying space by means of condensation of moisture contained in air coming into contact with one side part of the main body part which is disposed in the dehumidifying space and where the working fluid in liquid form evaporates therein.


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.


Patent
ESPEC Corporation | Date: 2014-11-07

A contact-type testing device that has a heating plate capable of being heated and in which a desired test is conducted while a test object is in contact with the heating plate, the contact-type testing device including: a heating member that heats the heating plate, wherein the heating member includes: a plurality of strips of heat generation bodies; and a power feeding section that feeds electricity to the heat generation bodies, wherein the heat generation bodies are distributed in a planar manner, and a group or all of the heat generation bodies are parallel-connected, wherein a part or all of the heat generation bodies have a steep temperature/resistance characteristic, and resistance values of the heat generation bodies increase with temperature, and wherein the heating member is disposed to face the heating plate, and a gap is provided between the heating plate and the heating member.


Patent
Espec Corporation | Date: 2015-07-15

A system comprising: a chamber which is surrounded by a heat-insulating part; and a dew-point instrument for measuring a dew-point of a measurement space, the dew-point instrument comprising: a main body part configured by a heat pipe or a meandering capillary tube type heat pipe or an oscillating heat pipe, said main body part being configured to encapsulate a working fluid therein and to cause a heat-pipe phenomenon and is disposed across the measurement space and an external space that is spaced from the measurement space by the heat-insulating part and has a temperature lower than that of the measurement space; and first temperature deriving means configured to derive a temperature of the main body part in a section where the working fluid evaporates, said section where the working fluid evaporates corresponds to a part of the main body part which is inserted in the chamber; wherein the measurement space is a space inside the chamber which is surrounded by the heat-insulating part; wherein the external space is a space outside the chamber.


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.

Loading ESPEC Corporation collaborators
Loading ESPEC Corporation collaborators