JP6688236B2 - Environmental test equipment - Google Patents

Description

  The present invention relates to an environmental test device that creates a desired environment in a test chamber. In particular, the present invention relates to an environmental test device having a window for observing the inside of a test chamber.

  2. Description of the Related Art An environment test device is known as a device for examining the performance and durability of a product or part such as an electric device as a device under test. The environmental testing device has a test room and can artificially create a predetermined environment such as a temperature environment (eg, high temperature or low temperature) or a humidity environment (eg, high humidity or low humidity) in the test room. Is.

By the way, there is a demand for observing deformation, discoloration, and the like of an object under test during an environmental test.
For example, as one of the environmental tests, there is a test in which an external force is applied to the test object, the test object is energized, or the test object is discharged while the test object is exposed to a constant environment.
When an external force is applied to the DUT while exposing the DUT to a constant environment, the DUT may break or deform during the test.
In some cases, it may be desirable to visually observe this change or perform video shooting.
This is also the case when the test object is energized or discharged, and the test object may smoke or explode, and it may be desirable to visually observe this change or perform video shooting.

In order to satisfy this requirement, there is known an environmental test device in which a window for observing the inside of a test chamber is provided in a door for taking in and out an object to be tested (Patent Document 1).
In the environmental testing device disclosed in Patent Document 1, the door is provided with a window for observing the inside of the test chamber. The windows have a double-glazed structure to ensure heat insulation in the test room and prevent heat and cold from leaking inside the test room.
That is, the window is made up of two pieces of glass, which are installed at regular intervals, and there is a space between the two pieces of glass. There is air in the space, and the air functions as a heat insulating layer.

Japanese Utility Model Publication No. 3-51357

The environmental testing device equipped with a window has a problem that the window may become clouded and the inside may be difficult to see.
Therefore, in the environmental test device disclosed in Patent Document 1, the air permeability is ensured between the space between the two glasses and the test chamber, and the temperature in the space between the two glasses and the temperature in the test chamber are maintained. The difference between and is reduced to prevent the glass on the test chamber side of the two sheets of glass from fogging.
Further, Patent Document 1 discloses, as a prior art thereof, a configuration in which a desiccant or dry air is enclosed in a space between two pieces of glass, or a wire heater is incorporated in the glass.
According to the structure of the prior art, it is possible to prevent the inside (space side) of the two sheets of glass from fogging.

However, for example, when the test is performed in a low temperature environment such as a temperature of -40 degrees Celsius in the test room, a room temperature of 35 degrees Celsius, and a humidity of 75%, the outside of the window glass (environmental testing device is installed). The water vapor contained in the room air may condense on the surface (inside the room) to form dew, and the window may become cloudy.
Also, when the door is opened, the outside of the two glasses forming the window may become cloudy. Then, according to the conventional technique, it is difficult to eliminate the fogging on the outside of the glass that occurs when the door is opened.
If the wire heater is incorporated in the glass, it is possible to eliminate the fogging that occurs when the door is opened, but the presence of the wire heater blocks the field of view, which may impair the function as a window. . In addition, the wire heater consumes electric power, and thus has a problem of being against energy saving.

  The present invention focuses on the above-mentioned problems of the prior art, and an object of the present invention is to provide an environment testing device in which windows are not easily fogged.

Invention to solve the problems described above, the environment test apparatus having a test chamber capable of internal to the desired environment, a window that can peek inside the test chamber, the window has a transparent plate In a multiple structure provided with a plurality of, dry gas is introduced into the space between the transparent plates, and when the space is in a positive pressure state, the dry gas in the space leaks to the outer surface side of the transparent plate. It is an environmental testing device that features one of the features.
The invention according to claim 1 is an environment test apparatus having a test chamber capable of forming a desired environment inside and a window capable of looking into the interior of the test chamber, wherein the window has a plurality of transparent plates. In a multiple structure provided, a dry gas is introduced into the space between the transparent plates from outside the test chamber, and when the space is in a positive pressure state, the dry gas in the space is the transparent plate. This is an environmental testing device having a structure that leaks to the outer surface side.
According to a second aspect of the present invention, in an environmental test device having a test chamber capable of forming a desired environment inside and a window capable of looking into the interior of the test chamber, the window includes a plurality of transparent plates. In a multiple structure provided, a dry gas is introduced into the space between the transparent plates, and when the space is in a positive pressure state, the dry gas in the space is at least one of the plurality of transparent plates. Of these, the environmental testing device has a structure that leaks out to the outer surface side of the transparent plate on the side forming the outer surface of the window.

Here, the “dry gas” means a gas that contains less water vapor than the outside air.
The environmental test apparatus of the present invention has a window through which the inside of the test chamber can be seen. Since the dry gas is introduced into the space between the transparent plates forming the window, even if a temperature difference occurs between the test chamber and the outside, the inside of the transparent plate of the window is unlikely to be condensed.
Further, in the environment test apparatus of the present invention, when the space between the transparent plates is in a positive pressure state, the dry gas inside leaks to the outer surface side of the transparent plate. Therefore, the outer surface of the transparent plate is covered with a dry gas atmosphere. Therefore, the outer surface of the transparent plate is not easily fogged, and even if it is fogged, the fog is eliminated early.
That is, the relative humidity of the outer surface of the transparent plate decreases, and the dew condensation water or ice formed on the outer surface of the transparent plate evaporates or sublimes to disappear.
Therefore, the inside of the test chamber can be satisfactorily observed from the outside.

In the invention according to claim 3 , the test chamber is covered with a heat insulating wall, the window is attached to the heat insulating wall, the dry gas in the space flows into the heat insulating wall, and passes through the heat insulating wall. the Te leak to the outer surface side of the transparent plate is an environment test apparatus according to one of the features.
According to a third aspect of the present invention, in an environmental test device having a test chamber capable of creating a desired environment inside and a window capable of looking into the interior of the test chamber, the window includes a plurality of transparent plates. With a multiple structure provided, dry gas is introduced into the space between the transparent plates, the test chamber is covered with a heat insulating wall, and the window is attached to the heat insulating wall. When the space is in a positive pressure state, the dry gas in the space flows into the heat insulating wall and leaks to the outer surface side of the transparent plate via the heat insulating wall. It is an environmental testing device.

According to the present invention, it is possible to prevent dew condensation in the heat insulating wall and also to prevent the fogging of the window.

According to a fourth aspect of the present invention, in an environmental test device having a test chamber capable of forming a desired environment inside and a window through which the inside of the test chamber can be seen, the test chamber is covered with a heat insulating wall. The window has a transparent plate and is attached to the heat insulating wall, and dry gas is introduced into the heat insulating wall, and the dry gas in the heat insulating wall leaks to the outer surface side of the transparent plate. It is one of the environmental test equipment.
That is, the invention according to claim 4 is an environment test apparatus having a test chamber capable of creating a desired environment inside and a window capable of looking into the interior of the test chamber, wherein the test chamber is a heat insulating wall. The window has a plurality of transparent plates and is attached to the heat insulating wall, dry gas is introduced into the heat insulating wall, and the dry gas in the heat insulating wall is removed from the heat insulating wall. It is an environmental test device having a structure that leaks to the outer surface side of the transparent plate.

According to the present invention, it is possible to prevent dew condensation in the heat insulating wall and also to prevent the fogging of the window.

The invention according to claim 5, dry gas in the space or in the heat insulating wall, in any one of claims 1 to 4, wherein the leakage of the side portion of the window and / or said transparent plate It is the described environmental testing device.

  According to the present invention, the outer surface of the transparent plate is covered with a dry gas atmosphere from the side.

The invention according to claim 6, wherein the transparent plate is mounted to the window frame member, the transparent plates and the window frame member in any one of claims 1 to 5, characterized in that breathable It is the described environmental testing device.

  In the environment testing apparatus of the present invention, since the window frame member and the transparent plate have air permeability, the dry gas inside leaks out from the side portion of the transparent plate.

The invention of claim 7 is an environmental test apparatus according to any one of claims 1 to 6, characterized in that it is possible to maintain the space positive pressure.

  According to the present invention, the dry gas inside can be constantly leaked from the side portion of the transparent plate.

The environment test apparatus of the present invention has the effect of making windows less likely to fog.
Therefore, according to the environmental test apparatus of the present invention, it is easy to visually observe the change of the object to be tested in the test chamber or take a video image.

It is a perspective view of the environmental testing device of the embodiment of the present invention. It is explanatory drawing which showed notionally the internal structure of the environment test apparatus of FIG. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of FIG. It is a perspective view of the window of the environmental testing apparatus of FIG. It is a partial perspective view which notches and shows a part of glass of the window of FIG. It is the front view which observed the window of the environmental testing device of FIG. 1 from the front, and shows the state which a dry air leaks notionally. (A) thru | or (d) are the conceptual drawings of the window of the environment testing apparatus of other embodiment of this invention. It is a perspective view of the window frame part of the window of the environmental testing apparatus of further another embodiment of this invention. It is a partially expanded view of the window of the environmental testing device of other embodiment of this invention, (a) shows the state in case the pressure of the clearance gap between glass is equal to external pressure, or low, (b) shows glass. The state where the pressure in the gap between them is higher than the atmospheric pressure is shown. It is a partially expanded view of the window of the environmental test apparatus of further another embodiment of this invention, (a) shows the state when the pressure of the clearance gap between glass is equal to external pressure, or low, (b) shows. A state in which the pressure in the gap between the glasses is higher than the atmospheric pressure is shown. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of other embodiment of this invention. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of other embodiment of this invention. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of other embodiment of this invention. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of other embodiment of this invention. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of other embodiment of this invention. It is a partially expanded view of the window of the environmental testing apparatus of further another embodiment of this invention, (a) shows the state in case the pressure in a heat insulation wall is equal to external pressure or low, (b) heat insulation The state where the pressure in the gap in the wall is higher than the atmospheric pressure is shown. It is a partially expanded view of the window of the environmental testing apparatus of further another embodiment of this invention, (a) shows the state when the pressure of the clearance gap in a heat insulation wall is equal to external pressure, or is low, (b). Shows the state when the pressure in the gap in the heat insulating wall is higher than the atmospheric pressure. (A) and (b) are the front views which observed the window of the environmental testing device of other embodiment of the present invention from the front, and show a state where dry air leaks notionally. It is a perspective view in the state where the door of the environmental testing device of another embodiment of the present invention was opened. It is explanatory drawing which conceptually demonstrated the side view of the cross section of the environmental testing apparatus of other embodiment of this invention. It is a perspective view of the environmental testing device of other embodiment of the present invention. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of other embodiment of this invention. It is sectional drawing of the window part provided in the door of the environmental testing apparatus of other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described.
The environment test apparatus 1 of this embodiment is an apparatus that can create a desired environment in the test chamber 5. The basic configuration of the environment test apparatus 1 is not significantly different from that of the conventional technique, and will be briefly described.
The main body of the environmental testing device 1 has a heat insulating tank 2 covered with a heat insulating wall 3 as shown in FIG. A test chamber 5 is formed in a part of the heat insulation tank 2. The test chamber 5 is a space in which the DUT 56 is installed.
The environmental testing device 1 further includes an air conditioner 10 and a blower 11. The air conditioner 10 includes a humidifying device 6, a cooling device 7, and a heater 8.
The environment test apparatus 1 has an air-conditioning air passage 15 that communicates with the test chamber 5 in an annular shape, and the air-conditioning equipment 10 and the blower 11 described above are built in the air-conditioning air passage 15.

The air-conditioning ventilation path 15 is formed in a part of the heat insulating tank 2 and communicates with the test chamber 5 at two locations, an air blowing section 16 and an air introducing section 18.
Therefore, when the blower 11 is activated, the air in the test chamber 5 is introduced into the air conditioning ventilation passage 15 from the air introduction unit 18. Then, the air-conditioning ventilation path 15 is in a ventilation state, the air comes into contact with the air-conditioning equipment 10 to perform heat exchange and humidity adjustment, and the adjusted air is blown from the air blowing portion 16 into the test chamber 5.
Further, a temperature sensor 12 and a humidity sensor 13 are provided near the air outlet 16 of the air conditioning ventilation passage 15.
When using the environment test apparatus 1, the air blower 11 is operated to put the air in the air-conditioning ventilation passage 15 so that the detected values of the temperature sensor 12 and the humidity sensor 13 approach the temperature and humidity of the set environment. Control the device 10.

An opening / closing door 20 is provided in the test chamber 5 of the environmental test device 1.
The opening / closing door 20 is the heat insulating wall 3 as shown in FIG. 3, and is formed by filling the outer shell 22 formed of a thin steel plate with a heat insulating material 98 such as glass wool.
The opening / closing door 20 is provided with a window 21.
As shown in FIG. 3, the window portion 21 has the window 30 fitted in the main body portion (opening / closing door 20 in the present embodiment) of the environmental testing device 1. In this embodiment, a sealant 43 such as a caulking agent is applied between the window 30 and the outer shell 22 of the heat insulating wall 3. The sealant 43 between the window 30 and the outer shell 22 of the heat insulating wall 3 is not essential and may be omitted.

As shown in FIGS. 3 to 5, the window 30 is composed of transparent plate-shaped glass 31, 32, 33 (transparent plate) and a frame-shaped member 35. The frame-shaped member 35 is a combination of four frame pieces 36 a, b, c, d as shown in FIGS. 4 and 5.
The glasses 31, 32, and 33 have a structure in which they are mounted at intervals on a frame-shaped member 35 composed of four frame pieces 36a, b, c, and d. That is, the window 30 has a multiple structure in which a plurality of glasses are laminated at intervals.

Each of the frame pieces 36a, b, c, d constituting the frame-shaped member 35 has three grooves 37 on one surface as shown in FIGS. The grooves 37 are formed in parallel with each other with a constant space.
The frame-shaped member 35 is formed by combining four pieces of frame pieces 36 a, b, c, d into a rectangular shape with the groove 37 inside. Therefore, three grooves 37 are provided on the inner peripheral surface of the frame member 35. Each groove 37 is connected in an annular shape.

In this embodiment, the four sides of the glasses 31, 32, 33 are fitted into the respective grooves 37, and the glasses 31, 32, 33 are laminated inside the frame-shaped member 35 with a space. Therefore, the glasses 31, 32, 33 are separated from each other, and spaces 38, 40 (FIG. 3) are formed in the window 30 by the gaps between the glasses 31, 32, 33 and the frame-shaped member 35. .
The groove 37 for holding the glass 32 at the center is filled with a sealant 44 such as a caulking agent. On the other hand, there is no caulking agent or other sealing agent in each groove 37 that holds 31, 31 on both sides, and the four sides of glass 31, 33 are directly inserted in groove 37. Therefore, there is a slight gap 41 between the glasses 31 and 33 and the frame-shaped member 35 as shown in FIG. 3, and there is some air permeability between the spaces 38 and 40 and the outside.

The relationship between the glasses 31, 32, 33 and the spaces 38, 40 is summarized as follows.
Each of the glasses 31, 32, and 33 is a transparent plate, has a rectangular planar shape, and has two main surfaces A and B. That is, the glass 31 has main surfaces 31A and 31B, the glass 32 has main surfaces 32A and 32B, and the glass 33 has main surfaces 33A and 33B.
As described above, the glasses 31, 32, and 33 are mounted on the frame-shaped member 35 at regular intervals, and the space 38 is provided between the glasses 31 and 32. There is a space 40 between the glass 32 and the glass 33.
Focusing on the glass 31, one main surface 31A faces the outside, and the other main surface 31B faces the space 38 sandwiched between the glass 31 and the glass 32.
Focusing on the glass 32, the main surfaces 32A and 32B face the spaces 38 and 40 sandwiched between the glasses 31, 32 and 33, respectively.
Focusing on the glass 33, the one main surface 33A faces the space 40 sandwiched between the glass 32 and the glass 33, and the other main surface 33B faces the test chamber 5.

Through holes 42 and 45 are provided in the frame piece 36 a that constitutes the upper side of the frame member 35. Further, a through hole 46 is also provided in the frame piece 36c that constitutes the lower side of the frame-shaped member 35.
The through holes 42, 45 provided in the frame piece 36 a forming the upper side are opened in the spaces 38, 40 sandwiched by the glasses 31, 32, 33. Specifically, the through hole 42 opens into the space 38 formed between the glass 31 and the glass 32, and the through hole 45 opens into the space 40 formed between the glass 32 and the glass 33.
Similarly, the through hole 46 provided in the frame piece 36c forming the lower side opens into the space 38 sandwiched by the glasses 31 and 32.

  The two through holes 42 and 45 on the upper side of the frame-shaped member 35 are connected via a pipe member 47. That is, one end of the pipe member 47 is connected to the through hole 42, and the other end is connected to the through hole 45. Therefore, the space 38 and the space 40 are partitioned by the glass 32, but communicate with each other through the pipe member 47 in a ventilable manner.

A flexible supply pipe 48 is connected to the through hole 46 on the lower side of the frame member 35, and the space 38 is connected to the dry air generating device 50 via the supply pipe 48.
The dry air generating device 50 includes a desiccant container 51, a filter 52, and a pressure reducing valve 53 connected in series as shown in FIG. 2, and is connected to an air source (not shown).
The desiccant container 51 is filled with a desiccant 55 such as silica gel.
Pressurized air is supplied to the dry air generator 50 from an air source such as a compressor. The pressurized air passes through the desiccant container 51 to be dehumidified, and further passes through the filter 52 to remove foreign matters.
Then, the pressure is reduced by the pressure reducing valve 53, and the pressure is supplied to the space 38 sandwiched between the glasses 31 and 32.

In the present embodiment, since the dry air generator 50 includes the desiccant container 51, most water vapor in the air is adsorbed.
The dry air (dry gas) preferably has a low water vapor content, but it does not have to have a water vapor content of zero.
It suffices that the dry air has an atmospheric pressure dew point that is 5 degrees Celsius or more lower than the temperature in the test chamber. Therefore, if the dew point of the air supplied from the air source is low due to the compressor having an air cooling device or the like, the dry air generating device 50 is not necessary. Further, even when nitrogen or the like is used as the dry gas, the dry air generator 50 is not necessary.

Next, the function of the above-mentioned environmental test device will be described.
When an environmental test is performed using the environmental test apparatus 1 of this embodiment, the air conditioner 10 and the blower 11 are started, and the environment in the test room 5 is adjusted to a desired test environment.
Further, in the environment test apparatus 1 of the present embodiment, dry air is further supplied to the space 38 of the window 30 of the opening / closing door 20 via the supply pipe 48. The two spaces 38, 40 sandwiched by the glasses 31, 32, 33 communicate with each other through the tube member 47, so that the two spaces 38, 40 are filled with dry air.
Then, the DUT 56 can be installed in the test chamber 5 to test the durability and the like.
Here, in the environment test apparatus 1 of the present embodiment, the window 30 is attached to the opening / closing door 20, so that the DUT 56 can be visually observed during the test and video shooting can be performed.

When the environment in the test chamber 5 is a low temperature environment such as -40 degrees Celsius, the spaces 38 and 40 in the window 30 of the opening / closing door 20 also have a low temperature. Here, in the environment test apparatus 1 of the present embodiment, the dry air is introduced into the spaces 38, 40 in the window 30 of the opening / closing door 20, and the spaces 38, 40 are filled with the dry gas, so that the respective glasses 31, 32. , 33 does not cause dew condensation or freezing on the side facing the spaces 38, 40.
More specifically, the main surface 31B of the glass 31 and the main surface 32A of the glass 32 face the space 38 between the glasses 31 and 32 and are in contact with dry air. Since the dew point of the atmosphere in the space 38 is low, dew condensation or freezing does not occur even if the temperature of the main surfaces 31B, 32A decreases.
Similarly, the main surface 32B of the glass 32 and the main surface 33A of the glass 33 face the space 40 and are in contact with the dry air. Since the dew point of the atmosphere in the space 40 is low, dew condensation or icing does not occur even if the temperature of the main surfaces 32B, 33A decreases.
Therefore, the inner surface side of the window 30 does not fog.

  In addition, in the environment test apparatus 1 of the present embodiment, the outside of the window 30 does not fog. That is, in the environment test apparatus 1 of the present embodiment, dew condensation or ice formation is unlikely to occur even on the sides of the glasses 31, 33 not facing the spaces 38, 40. Even if dew condensation or freezing occurs, it will disappear within a short time.

Hereinafter, this principle will be described.
In the environment test apparatus 1 of the present embodiment, dry air is supplied to the spaces 38, 40 in the window 30 of the opening / closing door 20 via the supply pipe 48, but an exhaust port for discharging air from the spaces 38, 40 to the outside. Instead, the space 38, 40 is made into a positive pressure atmosphere by the dry air.
On the other hand, in the present embodiment, the four sides of the glasses 31, 32, 33 are fitted into the respective grooves 37, and the respective sides of the glasses 31, 32, 33 are inserted into the grooves 37 of the frame-shaped member 35 and held. However, among the three glasses 31, 32, 33, there is no caulking agent or other sealing agent in each groove 37 that holds the two outer glasses 31, 33 except for the middle glass 32. , 33 and the frame-like member 35, there is a slight gap 41 as shown in FIG.
Therefore, as shown in FIG. 6, the dry air in the spaces 38, 40 leaks little by little from each side of the main surfaces 31A, 33B of the glasses 31, 33 facing the outside of the window 30. Particularly, in the present embodiment, the dry air is discharged from the gap between the side surface 88 of the groove 37 of the frame-shaped member 35 and the surfaces of the glasses 31 and 33, and the discharge direction of the dry air is along the surfaces of the glasses 31 and 33.
The leaked dry air flows along the main surfaces 31A, 33B of the glasses 31, 33 and wraps the main surfaces 31A, 33B of the glasses 31, 33.
Therefore, the main surfaces 31A and 33B are in contact with the dry air. Due to the leaked dry air, the dew point of the atmosphere in the vicinity of the main surfaces 31A, 33B is low, and even if the main surfaces 31A, 33B in the low temperature state come into contact with the outside air, dew condensation or freezing does not occur.

Further, when the test chamber 5 is adjusted to a low temperature environment to carry out an environmental test and the opening / closing door 20 is opened to replace the DUT 56, etc., the main surfaces 31A of the glasses 31, 33 facing the outside of the window 30, The 33B is fogged due to dew condensation or freezing, but the dew condensation or freezing evaporates or sublimes upon contact with dry air leaking from the spaces 38 and 40, and disappears in a short time.
Therefore, the environmental test apparatus 1 of the present embodiment has little visual field defect due to dew condensation or ice formation on the window 30 and can always observe or photograph the inside of the test chamber 5.

The amount of dry air intentionally leaked to the main surfaces 31A, 33B of the glasses 31, 33 is arbitrary, but a small amount of about 0.05 liter / minute to 0.5 liter / minute is sufficient.
The pressure in the spaces 38 and 40 may be a slight positive pressure, for example, 0.001 MPa (gauge pressure) to 0.03 MPa (gauge pressure).

It is desirable that the spaces 38 and 40 in the window 30 be kept in a positive pressure state at all times during the environmental test. However, when the temperature in the test chamber 5 is room temperature or high temperature, dew condensation occurs on the window 30. Since there is little concern that such problems will occur, the supply of dry air may be stopped.
For example, the supply of dry air may be turned on / off according to the temperature in the test chamber 5 or the set temperature.

In the embodiment described above, no sealant is provided between the grooves 37 on the four sides of the frame-shaped member 35 and the four sides of the glasses 31, 33, and the four sides of the glasses 31, 33 and the frame-shaped member 35. Between them, a gap 41 was formed and the dry air was discharged.
Although this configuration is recommended, it is not always necessary to form the gap 41 between all four sides of the glasses 31 and 33 and the frame-shaped member 35.
For example, as shown in FIG. 7A, a sealing agent 57 such as a caulking agent may be applied to the vertical sides of the glasses 31 and 33 so that the dry air leaks only from the upper and lower sides.
Alternatively, as shown in FIG. 7B, a sealing agent 57 such as a caulking agent may be applied to the upper and lower sides of the glasses 31 and 33 so that the dry air leaks only from the vertical sides.
FIG. 7C is an example in which the sealing agent 57 is applied to the vertical sides and the lower sides of the glasses 31 and 33, and the dry air is leaked only from the upper sides.
Further, as shown in FIG. 7D, the sealant 57 may be applied to the glasses 31 and 33 with a space therebetween to partially form the gap 41 so that the dry air may leak out. In FIG. 7D, the gap 41 is partially formed on all sides, but the gap 41 is provided only on a part of the sides, and the sealing agent 57 is applied to the other sides to seal the sides. Good.

  Alternatively, as shown in FIG. 8, a cutout 58 or an opening may be provided in the frame-shaped member 35 to let out the dry air.

As shown in FIGS. 9 and 10, it is also recommended that valve members 67 and 68 be provided on the sides of the glasses 31 and 33 so that outside air does not enter the spaces 38 and 40 of the frame-shaped member 35.
In the window 60 shown in FIG. 9, a lead-shaped valve element 66 is adhered to the side portion of the frame-shaped member 35. In the window 60 shown in FIG. 9, when the pressure on the outside becomes higher than the pressure in the spaces 38, 40, the free end side of the valve body 66 comes into close contact with the surface of the glass 31, 33 as shown in FIG. The gap between the frame-shaped member 35 and the glasses 31, 33 is closed to prevent outside air from entering the spaces 38, 40.
On the other hand, if the spaces 38, 40 in the frame-shaped member 35 have a positive pressure, the reed-shaped valve element 66 leaves the surface of the glass 31, 33 as shown in FIG. Dry air leaks out.

The window 61 shown in FIG. 10 has reed-shaped valve bodies 63 and 65 provided on both sides of the frame-shaped member 35 and the glasses 31 and 33.
In the window 61 shown in FIG. 10, when the pressure on the outer side becomes higher than the pressure in the spaces 38, 40, the free ends of the valve bodies 63, 65 come into close contact with each other as shown in FIG. The gap between the glass 35 and the glass 31, 33 is closed to prevent outside air from entering the spaces 38, 40.
On the other hand, if the spaces 38 and 40 in the frame-shaped member 35 have a positive pressure, the reed-shaped valve bodies 63 and 65 separate as shown in FIG. 10B, and the dry air in the spaces 38 and 40 leaks to the outside. Get out.

  In the embodiment described above, the plurality of spaces 38, 40 partitioned by the glasses 31, 32, 33 are conducted by the pipe member 47. However, as shown in FIG. 11, the supply pipes 48 are provided in the respective spaces 38, 40. You may connect and may supply dry air to each space 38, 40 individually.

In each of the embodiments described above, the dry air is leaked from the gap between the frame-shaped member 35 and the glasses 31 and 33. According to this embodiment, dry air is supplied directly from the sides of the glass 31, 33 to the surface of the glass 31, 33, which is preferable.
However, the present invention is not limited to this configuration, and dry air may be leaked from around the frame-shaped member 35.
Hereinafter, this configuration will be described with reference to FIGS. 12 to 17. Since there are many parts in common with the previous embodiment, the same configurations as those in the previous embodiment will be assigned the same reference numerals and overlapping description will be omitted.

As described above, the window portion 21 is provided on the opening / closing door 20 of the environmental testing device 1.
The structure of the window portion 21 is similar to that of the embodiment described with reference to FIG. 3, but the window 30 employed in the embodiment shown in FIG. 12 has all the grooves 37 for holding three glasses 31, 32, 33. A sealing agent such as a caulking agent is filled.
As described above, the opening / closing door 20 is the heat insulating wall 3, and the outer shell 22 made of a thin steel plate is filled with the heat insulating material 98 such as glass wool. ,
Although the window portion 21 shown in FIG. 12 is also provided in the opening / closing door 20, there is a minute gap 97 between the outer shell 22 of the heat insulating wall 3 and the window 30. More precisely, there is a minute gap 97 between the outer shell 22 of the heat insulating wall 3 and the frame member 35.
In this embodiment, as shown in FIG. 12, no sealant such as caulking agent is present between the window 30 and the outer shell 22 of the heat insulating wall 3. Therefore, around the window 30, the inside and outside of the heat insulating wall 3 are slightly breathable.

  Further, in the present embodiment, as shown in FIG. 12, a through hole 46 and a through hole (exhaust port) 100 are provided in the frame piece 36c forming the lower side of the frame member 35. The through hole 100 is located at a position communicating with the space 40, and the outside is open to the inside of the heat insulating wall 3. A tube may be attached to the through hole 100 and an opening of the tube may be opened inside the heat insulating wall 3.

Also in the environment test apparatus of this embodiment, dry air is supplied to the spaces 38 and 40 in the window 30 of the opening / closing door 20 via the supply pipe 48. The dry air enters the one space 38 from the supply pipe 48 and further flows into the other space 40 via the pipe member 47 as shown by the arrow in FIG. As a result, the two spaces are filled with dry air, and the spaces 38 and 40 in the window 30 are in a positive pressure state.
Then, the dry air further flows into the heat insulating wall 3 from the through hole 100.
As a result, the inside of the heat insulating wall 3 is in a positive pressure state, and the dry air leaks little by little from the minute gap 97 between the outer shell 22 of the heat insulating wall 3 and the window 30.
Particularly in the present embodiment, the dry air is discharged from the minute gap 97 between the outer shell 22 and the frame-shaped member 35, and the discharge direction of the dry air is along the surface of the glass 31, 33.
The leaked dry air flows along the main surfaces 31A, 33B of the glasses 31, 33 and wraps the main surfaces 31A, 33B of the glasses 31, 33.
Therefore, the main surfaces 31A and 33B are in contact with the dry air. Due to the leaked dry air, the dew point of the atmosphere in the vicinity of the main surfaces 31A, 33B is low, and even if the main surfaces 31A, 33B in the low temperature state come into contact with the outside air, dew condensation or freezing does not occur.

In the embodiment shown in FIG. 12, the dry air enters the space 38 surrounded by the glasses 31 and 32 from the supply pipe 48, flows into the other space 40 via the pipe member 47, and further from the through hole 100 to the heat insulating wall 3. Flows into the inside of the container and is discharged from a minute gap 97 between the outer shell 22 and the frame-shaped member 35.
That is, in the embodiment shown in FIG. 12, the dry air that has passed through the spaces 38 and 40 inside the window 30 is introduced into the inside of the heat insulating wall 3, and finally the minute gap between the outer shell 22 and the frame-shaped member 35. It is discharged from 97.

Further, as shown in FIG. 22, the tube member 47 connecting the two spaces 38 and 40 is omitted, and the gap 120 is intentionally provided between the intermediate glass 32 and the groove 37 of the frame-shaped member 35 to form the two spaces 38 and 40. You may communicate.
In the embodiment shown in FIG. 22, the caulking agent is not put in the groove 37 on the upper side, and the gap 120 is intentionally provided between the groove 37 on the upper side and the glass 32.
The dry air enters the space 38 surrounded by the glasses 31 and 32 from the supply pipe 48 shown at the bottom of the drawing, passes through the space 38, passes through the gap 120 formed on the upper side, and enters the other space 40. enter. Then, the dry air flows downward in the space 40 from the upper part of the drawing, flows into the heat insulating wall 3 from the through hole 100 drawn in the lower part of the drawing, and a minute gap 97 between the outer shell 22 and the frame-shaped member 35. Emitted from.

The gap 120 between the glass 32 and the groove 37 of the frame-shaped member 35 is preferably provided on a specific side so that dry air can pass through the spaces 38 and 40 without stagnating. Further, it is desirable to provide it at a position far from the supply pipe 48 and the through hole 100.
Of course, a gap may be provided on all sides or a plurality of sides. Further, it may be a gap partially formed on one side instead of the gap extending over the entire length of one side. For example, the structure according to the above-described FIG. 7D may be adopted, and a gap may be partially formed to let out the dry air.

Further, as shown in FIG. 23, supply pipes 48 are connected to the spaces 38, 40 partitioned by the glasses 31, 32, 33, respectively, and dry air is individually supplied to the spaces 38, 40 and the spaces 38, 40 are supplied to the spaces 38, 40. The through hole 100 may be provided.
According to this configuration, the dry air enters the spaces 38 and 40 from the two supply pipes 48, respectively, flows from the through hole 100 into the heat insulating wall 3, and a minute gap between the outer shell 22 and the frame-shaped member 35. It is discharged from 97.

A portion for introducing the dry air into the heat insulating wall 3 may be provided without passing through all the spaces 38, 40 inside the window 30.
For example, as shown in FIG. 13, a branch portion 101 may be provided in the pipe member 47 connecting the spaces 38 and 40, and a part of the dry air introduced from the space 38 into the space 40 may be opened inside the heat insulating wall 3.
Further, as in the window 102 shown in FIG. 14, the supply pipe 48 may be provided with the branch portion 103 to release the dry air before being introduced into the spaces 38 and 40 into the heat insulating wall 3.
Alternatively, as in the window 105 shown in FIG. 15, the dry air is introduced into the heat insulating wall 3 through a route that is completely different from the route for supplying the dry air to the spaces 38 and 40 inside the window 30. You may.
In the window portion 105 shown in FIG. 15, the dry air that has passed through the spaces 38 and 40 inside the window 30 is discharged to the outside through the discharge pipe 108 and does not enter the inside of the heat insulating wall 3.
On the other hand, in the window portion 105 shown in FIG. 15, there is an introducing pipe 110 for introducing dry air into the heat insulating wall 3, and the dry air is directly supplied to the inside of the heat insulating wall 3 from the introducing pipe 110.

Further, the dry air may not be introduced into the spaces 38 and 40, and only the dry air may be discharged into the heat insulating wall 3.
The dry air introduced into the heat insulating wall 3 contributes to the prevention of dew condensation and dehumidification of the heat insulating material 98.

Even when adopting the configuration in which the dry air is leaked from the side portion of the window 30 via the heat insulating wall 3, the valve members 67 and 68 similar to those in the above-described embodiments of FIGS. It is recommended not to get inside the heat insulating wall 3.
In FIG. 16, a lead-shaped valve body 66 is bonded to the open end of the outer shell 22. In the window portion 106 shown in FIG. 16, when the pressure on the outer side becomes higher than the pressure in the heat insulating wall 3, the free end side of the valve element 66 comes into close contact with the surfaces of the glasses 31, 33 as shown in FIG. The gap 97 between the outer shell 22 and the glasses 31, 33 is closed to prevent outside air from entering the heat insulating wall 3.
On the other hand, when the pressure inside the heat insulating wall 3 is positive, the reed-shaped valve element 66 leaves the surface of the glass 31, 33 as shown in FIG. 16B, and the dry air inside the heat insulating wall 3 leaks to the outside. .

The window 107 shown in FIG. 17 is provided with lead-shaped valve bodies 63 and 65 on both the open end of the outer shell 22 and the frame-shaped member 35 .
In the window portion 107 shown in FIG. 17, when the pressure on the outer side becomes higher than the pressure in the heat insulating wall 3, the free end sides of the valve bodies 63 and 65 come into close contact with each other as shown in FIG. The gap 97 between the glass 31 and the glass 33 is closed to prevent outside air from entering the heat insulating wall 3.
On the other hand, if the pressure inside the heat insulating wall 3 is positive, the reed-shaped valve bodies 63 and 65 separate as shown in FIG. 17B, and the dry air inside the heat insulating wall 3 leaks to the outside.

  Even when adopting the configuration in which the dry air leaks out from the side portion of the window 30 via the heat insulating wall 3, a sealing agent such as a caulking agent is provided on a part of the side similarly to the embodiment of FIG. 7 described above. 57 may be applied.

Further, the dry air may be leaked directly from the surface side of the glasses 31, 33.
For example, as shown in FIG. 18A, the transparent plate of the window 30 has a structure in which a plurality of glasses 80a and 80b are butted, and the dry air in the spaces 38 and 40 is leaked to the outside from the butted surfaces 81 of the glasses 80a and 80b.
Alternatively, as shown in FIG. 18B, a minute opening 82 is provided in the glass 31 (33), and the dry air in the spaces 38 and 40 is discharged from the opening 82.

The environmental test apparatus of the present invention can also be applied to an environmental test apparatus used as a part of a composite test apparatus.
Here, the composite testing device is a combination of a testing device such as a tensile testing device, a compression testing device, a shear testing device, a hardness testing device, an impact testing device, and an environmental testing device, and loads the material under a desired environment. Is given.
Hereinafter, a mode in which the present invention is applied to a composite test apparatus will be described.
The test apparatus 70 shown in FIG. 19 is a composite test apparatus, and more specifically, a composite tensile test apparatus. The test apparatus 70 of the present embodiment includes an environmental test apparatus 71 and an external force applying device 72. The external force applying device 72 is a tensile tester.

In the environmental test device 71 used in the present embodiment, the environmental test device main body 73 and the air conditioner unit 75 are separated, and both are connected by a pipe 76.
The environment test apparatus main body 73 of the environment test apparatus 71 has a door 77, and the door 77 is provided with the window 30 having the same structure as described above.
The environmental testing device main body 73 is provided with through holes 86 and 87 at the top and bottom. The through holes 86 and 87 are provided for inserting the rod 78 of the external force imparting device 72 and a part of the test piece. Also in the environment test apparatus 71 of the present embodiment, the dry air in the spaces 38, 40 leaks little by little from each side of the main surfaces 31A, 33B of the glasses 31, 33, and the leaked dry air is absorbed in the glass 31, 33. It flows along the main surfaces 31A and 33B and wraps the main surfaces 31A and 33B of the glasses 31 and 33.
Therefore, even if the temperature of the main surfaces 31A and 33B decreases, dew condensation or freezing does not occur, and the inside of the test chamber 5 can be constantly observed or photographed.

In the test apparatus (composite test apparatus) 70 shown in FIG. 19, the environmental test apparatus main body 73 and the air conditioner section 75 of the environmental test apparatus 71 are separate bodies, but both may be integrated.
The test apparatus (combined test apparatus) 90 shown in FIG. 20 is obtained by modifying the door 92 of the environmental test apparatus 91 including the test chamber 5 and the air conditioner 10, and the door 92 corresponds to the environmental test apparatus body 73 of FIG. The auxiliary component 93 is directly attached.
Although the internal structure of the environmental testing device 91 is different from the testing device described above in the layout of each device, there is no great difference in function. Therefore, members having the same function are given the same numbers as in the previous embodiment.

In the test apparatus 90 shown in FIG. 20, the test chamber 5 of the environment test apparatus 91 and the inside of the auxiliary component 93 communicate with each other, and the tensile test or the like can be performed while exposing the DUT 95 to a desired environment.
Also in the test apparatus 90 of the present embodiment, the dry air in the spaces 38, 40 leaks from each side of the main surfaces 31A, 33B of the glasses 31, 33 little by little, and the leaked dry air is the main of the glass 31, 33. It flows along the surfaces 31A and 33B and wraps the main surfaces 31A and 33B of the glasses 31 and 33. Therefore, dew condensation or freezing does not occur in the window 30, and the inside of the test chamber 5 can be constantly observed or photographed.
In the present embodiment, dry air is also introduced into the through holes 86 and 87 through which the rod 78 and the like of the external force imparting device 72 are inserted.
In the present embodiment, the dry air supplied from the dry air generator 50 is branched and supplied to the window 30 and the through holes 86 and 87.

  In each of the embodiments described above, the window 30 is provided in the opening / closing door 20, but the window 30 may be provided in the main body portion as in the environmental testing device 96 shown in FIG.

  In the embodiment described above, the window 30 has three glasses 31, 32, 33 arranged at intervals, but the number of glasses 31, 32, 33 may be two or more.

When adopting the configuration in which the sealant 57 and the valve members 67 and 68 are provided, it is desirable to provide these on both the outer glasses 31 and 33, but only one of the glasses 31 and 33 should have the sealant 57 and the valve members. 67 and 68 may be provided.
The valve members 67 and 68 may be used together in a configuration in which the sealant 57 is provided and the dry air is discharged from a part of the side of the window or the glass.

1 Environmental Test Equipment 5 Test Room 10 Air Conditioner 20 Opening / Closing Doors 30, 60, 61 Windows 31, 32, 33 Glass (Transparent Plate)
35 frame members 36a, b, c, d frame piece 37 groove 38, 40 space 41, 97 gap 48 supply pipe 50 dry air generator 67, 68 valve member 70, 90 test device (combined test device)
71 Environmental Testing Device 72 External Force Applying Device 100 Through Hole (Exhaust Port)

Claims (7)

And test chamber capable of internal to the desired environment, in the environment test apparatus having a window capable peek inside the test chamber,
The window has a multiple structure provided with a plurality of transparent plates, a dry gas is introduced into the space between the transparent plates from outside the test chamber ,
When the space has a positive pressure state, environmental test apparatus characterized by dry gas in the space is in the leaking structure on the outer surface side of the transparent plate. In an environment test apparatus having a test room capable of making the inside a desired environment and a window capable of looking into the inside of the test room,
  The window has a multiple structure in which a plurality of transparent plates are provided, and a dry gas is introduced into the space between the transparent plates,
  When the space is in a positive pressure state, the dry gas in the space has a structure of leaking to the outer surface side of the transparent plate on the side forming the outer surface of the window among at least the plurality of transparent plates. Environmental testing equipment characterized by In an environment test apparatus having a test room capable of making the inside a desired environment and a window capable of looking into the inside of the test room,
The window has a multiple structure in which a plurality of transparent plates are provided, and a dry gas is introduced into a space between the transparent plates.
The test chamber is covered with a heat insulating wall, said window is mounted on the heat insulating wall,
When the space has a positive pressure state, environmental testing dry gas in the space flows inside the heat insulating wall, and wherein the leak to the outer surface side of the transparent plate via the heat insulating wall apparatus. And test chamber capable of internal to the desired environment, in the environment test apparatus having a window capable peek inside the test chamber,
The test chamber is covered with a heat insulating wall, said window is mounted on the insulation wall have a plurality of transparent plates, the dry gas is introduced into the heat insulation wall, drying in the insulating wall An environmental testing device having a structure in which gas leaks from the heat insulating wall to the outer surface side of the transparent plate. Dry gas in the space or in the heat insulating wall, the environment test apparatus according to any one of claims 1 to 4, wherein the leakage of the side portion of the window and / or the transparent plate. The transparent plate is mounted to the window frame member, the environment test apparatus according to any one of claims 1 to 5 in the transparent plates and the window frame member is characterized in that breathable. The environment test apparatus according to any one of claims 1 to 6 , wherein the space can be maintained at a positive pressure.

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