JP2018204984A - Environmental test apparatus and air conditioner for environmental test - Google Patents

Abstract

To propose an environmental test apparatus having a structure that hardly causes dew condensation on a surface of a heat insulating housing or dripping of water droplets.SOLUTION: The environmental test apparatus is provided with a heat insulating housing. A predetermined test is conducted by placing a test piece in the heat insulating housing. The heat insulating housing has an inner casing 31 and an outer casing 30. A heat insulating material 33 is present in an inter-wall space 32 between the inner casing 31 and the outer casing 30. The outer casing 30 has a drain port 51. The inter-wall space 32 contains a water conduction member 70 capable of containing and/or passing water. A part of the water conduction member 70 reaches a vicinity of the drain port 51.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an environmental test apparatus for performing a test by placing a device under test in a predetermined environment. The present invention is suitable as an environmental test apparatus having a low temperature chamber such as a thermal shock test apparatus. The present invention also relates to an environmental test air conditioner for supplying temperature-controlled air to a test room or the like.

As a device for testing the performance and durability of products and materials, an environmental test device is known.
One of the environmental test apparatuses is a thermal shock test apparatus as disclosed in Patent Documents 1 and 2 and the like. In the thermal shock test apparatus disclosed in Patent Document 1, a gas adjusted to a high temperature is introduced into a test chamber and the test object is exposed to a high temperature atmosphere in a high temperature exposure mode, and a gas adjusted to a low temperature is used. It is possible to apply a thermal shock to the DUT by introducing it into the test room and sequentially performing the operation in the low temperature exposure mode in which the DUT is exposed to a low temperature atmosphere.

FIG. 1 is a perspective view showing the appearance of a typical three-tank thermal shock test apparatus. FIG. 2 is a cross-sectional view conceptually showing the heat insulating casing of the thermal shock test apparatus.
The thermal shock test apparatus is a form of an environmental test apparatus. For example, a function of supplying hot stress or cold air to a test object such as an electronic component or an electronic device in a predetermined cycle to apply thermal stress to the sample body. It is an apparatus provided with.

As shown in FIG. 1, an environmental test apparatus 100 capable of performing a thermal shock test is provided with a heat insulating casing 101 indicated by a broken line in a casing 13 constituting an outer shell.
In the environmental test apparatus 100, the interior of the heat insulating casing 101 is divided into three rooms as shown in FIG. Specifically, in the environmental test apparatus 100, a test chamber 3 in which a sample body is placed, a high temperature chamber 5 that sends hot air to the test chamber 3, and cold air to the test chamber 3 are provided in the heat insulating casing 101. A low temperature chamber 6 is provided. In the example shown in FIG. 2, with the test chamber 3 as a reference, the high temperature chamber 5 is disposed at the upper portion and the low temperature chamber 6 is disposed at the lower portion.

Between the test chamber 3 and the high temperature chamber 5, vent holes 7a and 7b communicating with each other are provided. Similarly, between the test chamber 3 and the low temperature chamber 6, vent holes 8a and 8b communicating with each other are provided.
And the dampers 10 and 11 which restrict | limit the passage of the gas between chambers are provided in each vent hole 7 and 8. FIG.
In the environmental test apparatus 100, a series of high temperature side air circulation paths are formed between the test chamber 3 and the high temperature chamber 5, and the high temperature side dampers 10a and 10b open and close the high temperature side air circulation path.
Similarly, a series of low temperature side air circulation paths are also formed between the test chamber 3 and the low temperature chamber 6, and the low temperature side dampers 11a and 11b open and close the low temperature side air circulation paths.

  The test chamber 3 is a part where a high temperature environment and a low temperature environment are repeatedly created, and has a test chamber side temperature sensor 12 that detects the ambient temperature in the test chamber 3.

  The high greenhouse 5 is a portion having a function of heating the gas in the room to a preset temperature on the high temperature side, and circulating the heated gas between the test chambers 3. A high-temperature side fan 16 that circulates gas, and a high-temperature side temperature sensor 17 that detects the atmospheric temperature in the high-temperature chamber 5.

  The low greenhouse 6 is a part having a function of cooling the indoor gas to a preset temperature on the low temperature side and circulating the cooled gas to and from the test chamber 3, and as a main configuration, cools the gas. A cooler 20 that circulates the gas, a low-temperature side fan 21 that circulates the gas, an adjustment heater 23 that finely adjusts the temperature of the cooled gas, and a low-temperature side temperature sensor 25 that detects the ambient temperature in the low-temperature chamber 6. Yes.

When performing the operation in the high temperature exposure mode, the high temperature side dampers 10 a and 10 b are opened, and high temperature air is introduced from the high temperature chamber 5 into the test chamber 3.
On the contrary, when the operation in the low temperature exposure mode is performed, the low temperature side dampers 11 a and 11 b are opened and the low temperature air is introduced into the test chamber 3 from the low temperature chamber 6.

In the conventional environmental testing apparatus 100, the heat insulating casing 101 has an outer casing 110 and an inner casing 111 as shown in FIG. Is built-in.
The outer casing 110 is made by combining a plurality of members. For example, in the outer casing 110 shown in FIG. 16, there are a side member 115 and a bottom member 116, and the bottom portions of the outer casing 110 are formed by joining flange portions 117, 118 formed at both ends. .

Japanese Patent Laid-Open No. 11-160217 JP-A-9-304258

As shown in FIG. 16B, the conventional environmental test apparatus (cooling and thermal shock test apparatus) 100 sometimes has dew condensation 120 on the outside of the heat insulating casing 101. Moreover, as shown in FIG. 16B, the environmental test apparatus 100 of the prior art sometimes leaks water 121 from the wall of the heat insulating casing 101.
When this reason was examined, it was because the condensed water 122 collected in the space part 112 between the outer housing | casing 110 and the inner housing | casing 111 like FIG.16 (b).

That is, the heat insulating casing 101 of the environmental test apparatus 100 includes the outer casing 110 and the inner casing 111 as described above, and the inter-wall space portion 112 is between them.
The inter-wall space 112 is often sealed, but its airtightness is not so high, and external air may enter through some gap.
On the other hand, the inside of the heat insulating casing 101, particularly the low temperature chamber 6, becomes a low temperature environment. Therefore, water vapor in the air that has entered the inter-wall space 112 may condense and condense inside the inter-wall space 112. Further, as described above, since the inter-wall space 112 is often in a sealed state, the condensed water 122 may accumulate in the inter-wall space 112 as shown in FIG.

As a result, the heat insulating performance of the heat insulating material 108 may be impaired, and the cold heat of the low temperature chamber 6 may be conducted to the outer casing 110, and the surface temperature of the outer casing 110 may be lowered to cause dew condensation 120 on the surface. there were.
Further, the condensed water 122 that has accumulated may leak out from the joints of the flange portions 117 and 118 at the bottom of the outer casing 110, for example, and the water 121 may be dripped.

  The present invention focuses on the above-described problems of the prior art, and an object of the present invention is to propose an environmental test apparatus having a structure in which condensation is not generated on the surface of the heat-insulating housing or water leakage is unlikely to occur. . Another object is to propose an environmental test air conditioner having the same function.

  Invention of Claim 1 for solving an above-mentioned subject is an environmental test apparatus which has a heat insulation housing | casing, and mounts a to-be-tested object in the said heat insulation housing | casing, and performs a predetermined | prescribed test, The wall body of the heat insulating housing has an inner plate and an outer plate, and there is a heat insulating material in a space between the walls formed between the inner plate and the outer plate, and a part or all of the region in the heat insulating housing is in a low temperature state. In the environmental test apparatus, the outer plate has a drain outlet, and the inter-wall space includes a water-conducting member capable of containing water and / or water, and part of the water-conducting member has a drain outlet. It is an environmental test apparatus characterized by being in the vicinity.

  Invention of Claim 2 for solving the same subject is an environmental test apparatus which has a heat insulation housing | casing, mounts a to-be-tested object in the said heat insulation housing | casing, and performs a predetermined | prescribed test, The heat insulating housing has an inner housing and an outer housing, and there is a heat insulating material in a space between the walls formed between the inner housing and the outer housing, and a part or all of the region in the heat insulating housing. In an environmental test apparatus that may be in a low temperature state, there is a drain outlet in the outer casing, and a water-conducting member capable of containing water and / or water is incorporated in the space between the walls. Is an environmental test apparatus characterized in that it reaches the vicinity of the drain outlet.

“Water-containing” means that the inside can contain water. In addition, “water can be passed” means that water can pass therethrough.
In the environmental test apparatus of Claim 1 and Claim 2, the water guide member is incorporated in the space part between walls. A part of the water guiding member reaches the vicinity of the drain outlet.
Therefore, the condensed water generated in the space between the walls is captured by the water guiding member and guided to the drain outlet. The condensed water is drained to the outside from the drain port. For this reason, in the environmental test apparatus of the present invention, condensed water does not easily accumulate in the space between the walls.

  A third aspect of the present invention is the environmental test apparatus according to the first or second aspect, wherein the water guiding member is a fiber that can contain water.

  According to the present invention, the condensed water generated in the space between the walls is sucked and captured by the water guide member by a capillary phenomenon or the like. When the condensed water increases and exceeds the limit amount that the water conveyance member can retain, the captured condensed water overflows from the discharge port and is drained.

  The invention according to claim 4 is characterized in that the water guiding member is water-insulating and is a heat insulating material different from most of the heat insulating materials arranged in the space between the walls. It is an environmental test apparatus described in the above.

  According to the present invention, the condensed water generated in the inter-wall space is sucked and captured by the water guide member. Moreover, since the water guide member employ | adopted by this invention is a heat insulating material, the heat insulation housing | casing can ensure the heat insulation performance substantially the same as the prior art.

  The invention according to claim 5 is characterized in that the water guiding member is glass wool, and most of the heat insulating material disposed in the space between the walls is a foamed resin. Environmental test equipment.

In the present invention, glass wool is adopted as the water guiding member. Since glass wool has a heat insulating property, the heat insulating casing can ensure the heat insulating performance same as that of the prior art.
In the present invention, since the other heat insulating material is a foamed resin, glass wool as a water guiding member has higher water absorption than other heat insulating materials. Therefore, the condensed water generated in the space between the walls is efficiently captured by the water guide member.

  According to a sixth aspect of the present invention, the heat insulating casing includes an inner casing and an outer casing, and the space between the walls exists between the inner casing and the outer casing. The environmental test apparatus according to claim 1, further comprising a bottom surface portion, wherein the water guide member is disposed on a bottom surface portion of the outer casing.

  The condensed water generated in the space between the walls falls by gravity and collects in the lower part. Here, in the environmental test apparatus according to the present invention, the water guide member is disposed on the bottom surface of the outer casing, so that the condensed water falling in the lower part can be captured.

  According to a seventh aspect of the present invention, the heat insulating casing includes an inner casing and an outer casing, and the space between the walls exists between the inner casing and the outer casing. The environmental test apparatus according to claim 1, further comprising a side surface portion on at least one surface, wherein the water guide member is disposed along the side surface portion on at least one surface.

  The condensed water often flows down along the side surface of the outer casing. Here, in the environmental test apparatus of the present invention, the water guide member is disposed along the side surface portion of the outer casing, and therefore it is easy to capture the condensed water flowing down.

  According to an eighth aspect of the present invention, the heat insulating casing includes an inner casing and an outer casing, and the space between the walls exists between the inner casing and the outer casing. 8 has a bottom surface portion and a plurality of side surface portions, and the water guiding member is arranged along a corner formed by the bottom surface portion and the plurality of side surface portions. It is an environmental test apparatus of description.

  According to the environmental test apparatus of the present invention, it is easy to capture condensed water flowing down along the side surface of the outer casing.

  According to a ninth aspect of the present invention, the heat insulating casing includes an inner casing and an outer casing, and the space between the walls exists between the inner casing and the outer casing. The bottom portion of the plate is constituted by a tray-like member having a bottom plate portion and a side wall surrounding the bottom plate portion and raised from the bottom plate portion. The tray-like member is formed by a single seamless plate. The environmental test apparatus according to claim 1, wherein the environmental test apparatus is an environmental test apparatus.

  According to the present invention, there is little concern that condensed water leaks from other than the predetermined drainage port.

  The invention according to claim 10 is characterized in that a check valve is provided at the drain outlet to allow the flow of fluid from the space between the walls to the outside and prevent the reverse flow. The environmental test apparatus according to any one of 1 to 9.

  According to the present invention, it is possible to prevent outside air from entering the space between the walls to some extent from the outside. Therefore, it is possible to suppress the occurrence of condensed water due to intrusion of outside air in the space between the walls.

  According to an eleventh aspect of the present invention, in the environmental test apparatus according to the tenth aspect, the check valve is a swing type check valve.

  A swing type check valve generally has a low minimum operating pressure and opens even when the water pressure (position head) of the condensed water near the drain port is low.

  The invention for solving the same problem is an environmental test air conditioner having a heat insulating housing, wherein at least a cooler is arranged in the heat insulating housing and capable of supplying air adjusted to a low temperature, The heat insulating housing has an inner housing and an outer housing, and there is a heat insulating material in a space between walls formed between the inner housing and the outer housing, and a part or all of the heat insulating housing In an air conditioner for an environmental test in which an area may be in a low temperature state, a drainage port is provided in an outer casing, and a water guide member capable of containing water and / or water is incorporated in the space between the walls. This is an air conditioner for environmental testing characterized in that a part of it reaches the vicinity of the drain outlet.

  As one type of environmental test apparatus, a test room and an air conditioner are separate apparatuses, and the two are connected by a duct or the like. The present invention corresponds to this type of environmental test apparatus.

  The environmental test apparatus and the environmental test air conditioner of the present invention can prevent the condensed water from accumulating between the inner casing and the outer casing of the heat insulating casing. For this reason, the heat insulation performance is deteriorated, and the surface of the heat insulation casing is dew-condensed.

It is a perspective view which shows the external appearance of the environmental test apparatus in embodiment of this invention and a prior art. It is sectional drawing which shows notionally the heat insulation housing | casing of the environmental test apparatus of FIG. (A) is the perspective view which observed the heat insulation housing | casing of FIG. 1, and the drain pan under it from the back surface side, (b) is the perspective view observed from the front side. It is sectional drawing which shows the structure of the lower part of the heat insulation housing | casing of FIG. (A) is the disassembled perspective view which decomposed | disassembled the heat insulation housing | casing of FIG. 3 from the back surface side, (b) is the enlarged view in the circle | round | yen. It is the disassembled perspective view which decomposed | disassembled the heat insulation housing | casing of FIG. 3 vertically. (A) is a perspective view which shows the assembly structure of the outer side housing | casing of the heat insulation housing | casing of FIG. 3, (b) is AA sectional drawing of (a), (c) is B of (a). It is -B sectional drawing. It is an AA cross-section perspective view of FIG. FIG. 4 is a perspective view of the vicinity of a drain port of the heat insulating housing of FIG. 3. It is a disassembled perspective view of the drain outlet vicinity of the heat insulation housing | casing of FIG. It is sectional drawing of the drain outlet vicinity (including a drain pan) of the heat insulation housing | casing of FIG. 3, Comprising: (a) shows the state where the water level in the space part between walls is low, (b) shows the high water level in the space part between walls. Indicates the state. (A), (b), (c), (d) is sectional drawing which shows the structure of the lower part of the heat insulation housing | casing in other embodiment of this invention. (A), (b) is a perspective view which shows the modification of a water conveyance member. It is sectional drawing which shows notionally the heat insulation housing | casing of the environmental test apparatus of other embodiment of this invention. It is sectional drawing which shows notionally the environmental test apparatus which employ | adopted the air conditioner for environmental tests of embodiment of this invention. It is sectional drawing which shows the structure of the lower part of the heat insulation housing | casing of a prior art, (a) shows the state without condensed water in the space part between walls, (b) shows the state which condensed water accumulated in the space part between walls. Show.

Embodiments of the present invention will be further described below.
The environmental test apparatus 1 of this embodiment is a thermal shock test apparatus. The external appearance of the environmental test apparatus 1 is the same as the conventional one, as shown in FIG. Also in the environmental test apparatus 1 of the present embodiment, a heat insulating casing 2 indicated by a broken line is provided in a casing 13 constituting an outer shell as shown in FIG.
Further, the structure inside the heat insulating housing 2 is the same as that in the prior art. As shown in FIG. 2, the interior is divided into a high temperature chamber 5, a test chamber 3, and a low temperature chamber 6. is there.
In the environmental test apparatus 1, the low temperature chamber 6 which is a part in the heat insulation housing 2 is in a low temperature state. The test chamber 3 which is a part of the heat insulating casing 2 is in a low temperature state when operated in the low temperature exposure mode.
The environmental test apparatus 1 of the present embodiment is characterized by the structure of the heat insulating casing 2 itself.
Hereinafter, description will be given with emphasis on the characteristic portions of the present embodiment.

The heat insulation housing | casing 2 employ | adopted with the environmental test apparatus 1 of this embodiment has the outer housing | casing 30 and the inner housing | casing 31 like FIG.4, FIG.5, FIG.6 like the prior art. As shown in FIG. 4, there is an inter-wall space 32 between the outer housing 30 and the inner housing 31, and a heat insulating material 33 is built in the inter-wall space 32.
That is, the wall 28 of the heat insulating wall of the heat insulating housing 2 has an inner plate 35 constituted by the inner case 31 and an outer plate 36 constituted by the outer case 30. The heat insulating material 33 exists in the inter-wall space 32 formed therebetween.
Both the outer casing 30 and the inner casing 31 are made of a rust-resistant metal plate such as stainless steel or a coated steel plate.

The outer casing 30 employed in the present embodiment is constituted by a main body box 40 and a back plate 41 as shown in FIG. As shown in FIG. 5, the main body box 40 is a box having a bottom plate 42, a top plate 43, left and right side plates 46 a and 46 b, and a front plate 47. The front plate 47 is provided with an opening 48 (FIG. 3B) for attaching the opening / closing door 50 (FIG. 1).
The back side of the main body box 40 has only a lower frame portion as shown in FIG. In the present embodiment, a drain outlet 51 is provided in the lower part on the back side of the main body box 40.

In the present embodiment, the main body box 40 of the outer housing 30 is constituted by an upper structure 52 and a lower structure 53.
The lower structure 53 is a member that constitutes the lower frame portion of the outer housing 30 and is a member that has a tray shape as shown in FIG. The lower structure 53 is formed by bending a single seamless metal plate, and surrounds the rectangular bottom plate 55 and the bottom plate 55 as shown in FIG. It has four raised side walls 56. An inner flange 57 is provided at the upper end of the side wall 56.

The lower structure 53 is a tray-like member, and the bottom plate 55 has no openings or seams. The drainage port 51 described above is provided on one side wall 56 of the lower structure 53.
In the present embodiment, the bottom plate 55 of the lower structure 53 constitutes the bottom plate 42 of the main body box 40, and the upper surface of the bottom plate 55 is the bottom portion of the outer housing 30 in the assembled state as the outer housing 30. Configure.

  The upper structure 52 is a half box-shaped member that constitutes the top plate 43, the left and right side plates 46 a and 46 b, and the front plate 47. Inner flanges 58 are provided at the lower ends of the left and right side plates 46 a and 46 b and the front plate 47.

The main body box 40 of the outer housing 30 is formed in a box shape by joining the inner flange 58 of the upper structure 52 and the inner flange 57 of the lower structure 53.
The outer casing 30 is a box in which a back plate 41 is attached to the back surface of the main body box 40, and the back surface, the bottom surface, the top surface, the left and right side surfaces, and the front surface are covered with plates.
Specifically, the front surface of the outer housing 30 is covered by the front plate 47 of the main body box 40 and the side wall 56 of the lower structure 53 (excluding the opening 48), and the back surface of the outer housing 30 is covered with the back plate 41 and The lower structure 53 is covered with a side wall 56.
The top surface of the outer casing 30 is covered with the top plate 43 of the main body box 40, and the side surfaces are covered with the left and right side plates 46 a and 46 b of the main body box 40 and the side walls 56 of the lower structure 53. The bottom surface of the outer housing 30 is covered with a bottom plate 55 of the lower structure 53.
The drain port 51 described above is located on the rear surface side of the outer housing 30 and near the lower side surface.

  The inner housing 31 is a rectangular parallelepiped, and is a box having a back plate 60, a bottom plate 61, a top plate 62, left and right side plates 63 a and 63 b, and a front plate 65. The front plate 65 of the inner housing 31 is also provided with an opening 66 (FIG. 3B) for attaching the opening / closing door 50 (FIG. 1).

Also in the environmental test apparatus 1 of the present embodiment, there is an inter-wall space portion 32 between the outer casing 30 and the inner casing 31 as in the related art. And the heat insulating material 33 is incorporated in this space part 32 between walls.
In addition, in this embodiment, the water guide member 70 is built in the inter-wall space 32.
In this embodiment, the water guide member 70 is a glass wool band. That is, the water guide member 70 is a mat made of glass wool, and is formed into a strip shape having a rectangular cross-sectional shape.
The water guide member 70 is a glass wool, a bundle of thin glass fibers, and has water content. That is, the water guide member 70 can contain a lot of water inside. The water guiding member 70 has water absorption and water retention. Furthermore, since the water guiding member 70 is made of glass wool, it also has heat insulation properties.

In the present embodiment, as shown in FIGS. 4, 5, 6, and 8, the water guide member 70 is provided at a position along the side wall of the outer housing 30 on the bottom surface of the outer housing 30. ing.
Specifically, the water guiding member 70 is provided on the bottom plate 42 (the bottom plate 55 of the lower structure 53) of the outer housing 30 at a position along the side wall 56 of the lower structure 53.
As described above, the bottom plate 55 of the lower structure 53 constitutes the bottom surface portion of the outer housing 30, and the side wall 56 of the lower structure 53 constitutes the lower side surface portion of the outer housing 30.
It can be said that the water guide member 70 is disposed along the corner of the lower structure 53 constituting the outer housing 30 where the bottom plate 55 and the side wall 56 intersect. In the present embodiment, the water guiding member 70 is in the inter-wall space portion 32, and the position of the water guiding member 70 is a position along the side surface portion of the outer casing 30.
The water guide member 70 is laid along the entire circumference of the lower side wall 56 of the outer housing 30, and a part of the water guide member 70 is in the vicinity of the drain port 51 opened in the side wall 56 and directly on the inner surface side of the drain port 51. Are touching.

The water guide member 70 itself has a belt shape, and is laid along the four side walls of the outer housing 30. Therefore, when the state in which the water guiding member 70 is installed is viewed in plan, it has a ring-like shape as shown in FIGS.
When the water guide member 70 is viewed in a plan view as shown in FIGS. 6 and 8, it is a quadrangular ring, and a part of the side surface thereof faces the drain port 51.
The water guide member 70 is preferably in the form of a single band, but a bundle of glass wool is laid one by one along each side wall of the four sides of the outer housing 30, and each corner is intersected at each corner. It may be a stack of glass wool bundles laid.

The heat insulating material 33 disposed in the inter-wall space portion 32 is, for example, urethane foam resin. It is desirable that the heat insulating material 33 is a closed cell.
The manufacturing method of the heat insulating housing 2 is not limited. For example, the main body box 40 in which the upper structure 52 and the lower structure 53 are joined is formed, and the bottom plate 55 and the side wall 56 of the lower structure 53 intersect. The water guide member 70 is installed along the corner.
Then, the inner casing 31 is installed in the main body box 40. In addition, inclusions (not shown) are placed so that a predetermined gap is secured between the inner housing 31 and the main body box 40.
In this state, a liquid urethane raw material is cast between the inner casing 31 and the main body box 40, and the back plate 41 is immediately closed, and the inter-wall space 32 between the inner casing 31 and the outer casing 30 is used. The urethane raw material is foamed and cured.

  The urethane raw material is foamed to increase its volume, and the heat insulating material 33 constituted by the urethane resin foam spreads in the space portion 32 between the walls without a gap, and the space portion 32 between the walls is filled with the heat insulating material 33. When the urethane raw material is foamed and cured, the urethane resin foam is bonded to both the inner casing 31 and the outer casing 30. Therefore, the heat insulating material 33 is bonded to both the inner housing 31 and the outer housing 30.

  A water guide member 70 is provided inside the inter-wall space 32 so as to surround the lower edge. The water guide member 70 surrounds the inside of the four side walls 56 of the lower structure 53, and a part thereof faces the drain port 51 provided on one surface of the lower structure 53 and is in contact with the drain port 51. Yes.

In the present embodiment, the water guide member 70 also has heat insulation, but the water guide member 70 and the heat insulating material 33 are different in material, shape, and properties.
The material of the water guide member 70 is glass and inorganic, whereas the heat insulating material 33 is urethane, resin, and organic.
The shape of the water guide member 70 is a fiber, which is gathered into a mat shape, and further formed into a belt shape. On the other hand, the heat insulating material 33 is a closed cell, and the overall shape is a shape along the inter-wall space portion 32.
The material of the water guide member 70 has water content. The material of the water guide member 70 has a property of absorbing water by a capillary phenomenon or the like and has a function of retaining water. That is, the water guide member 70 has a property of sucking water when it comes into contact with water and keeping the water inside.
On the other hand, the heat insulating material 33 has poor water absorption and has almost no function of retaining water therein.

In this embodiment, a check valve 75 is provided outside the drain port 51 as shown in FIGS. The check valve 75 is attached in such a direction as to permit the flow of fluid from the inter-wall space 32 to the outside and prevent the reverse flow.
The check valve 75 employed in the present embodiment is a swing type check valve 75, in which a fixed piece 76 and a swing piece 77 are rotatably joined by a pin 78.
The swing piece 77 is provided with a weight member 80.
In this embodiment, a flat hinge for joinery is used as the check valve 75, and a round bar-shaped weight member 80 is attached to one blade of the flat hinge.
The check valve 75 is attached to a position that covers the drain port 51 of the outer housing 30 when the swing piece 77 is suspended by its own weight with the fixed piece 76 facing upward.
As shown in FIG. 1, the heat insulating housing 2 is in a housing 13 that forms an outer shell. A drain pan 81 is located at the lowest position of the housing 13 as shown in FIG.

Next, functions of the environmental test apparatus 1 of the present embodiment will be described.
In the environmental test apparatus 1 of this embodiment, the drain hole 51 is the only communication hole that communicates the inter-wall space 32 and the outside. In this embodiment, the check valve 75 is attached to the drain port 51, and the swing piece 77 of the check valve 75 normally closes the drain port 51 as shown in FIG.
For this reason, the drain port 51 is normally sealed off by the check valve 75, so that the outside air does not easily enter the inter-wall space 32. Therefore, the environmental test apparatus 1 of the present embodiment has little water vapor condensation in the inter-wall space portion 32.

However, also in the environmental test apparatus 1 of the present embodiment, the air in the inter-wall space portion 32 may be cooled and condensed as in the related art.
In this embodiment, the heat insulating material 33 is a closed-cell urethane foam resin, and has a low water content. That is, it is difficult to contain water inside. Furthermore, the water absorption is poor. Therefore, the condensed water 45 falls by gravity without being absorbed by the heat insulating material 33 and reaches the bottom of the inter-wall space portion 32.
Here, in the heat insulating casing 2 of the present embodiment, the water guide member 70 is arranged on the bottom surface of the inter-wall space 32 as shown in FIG.
Further, the water guiding member 70 can contain water (hydrated) and has water absorption. Compared to the heat insulating material 33, the water guide member 70 has a remarkably high amount of water that can be contained therein, and also has a significantly high water absorption capacity for sucking water. Therefore, when the condensed water 45 touches the water guide member 70, the condensed water 45 is sucked into the water guide member 70 by capillary action and collected in the water guide member 70.
Further, since the water guiding member 70 has water retention, the condensed water 45 is continuously held until a certain amount is reached.

And if the condensed water 45 gathers in the water conveyance member 70 and the water retention capacity of the water conveyance member 70 is exceeded, the condensed water 45 hold | maintained from the water conveyance member 70 will be discharged.
Here, a part of the water guide member 70 is in a position close to the drain port 51 and is in contact with the drain port 51. Therefore, when the condensed water 45 accumulates exceeding the water retention capacity of the water guiding member 70, the swinging piece 77 of the check valve 75 is swung as shown in FIG. The condensed water 45 held in the water is discharged from the drain outlet 51, and the water level in the water guide member 70 in the inter-wall space 32 is lowered.

Therefore, the condensed water 45 is excessively accumulated in the inter-wall space portion 32 or discharged without spreading, so that it is difficult to wet the heat insulating material 33 disposed in the majority, and the heat insulating material 33 is not adversely affected.
Therefore, the heat insulating material 33 exhibits its performance over a long period of time, and it is difficult for a problem such as dew condensation to occur outside the heat insulating housing 2.
Further, since the place where the condensed water 45 is discharged is limited to the drain outlet 51, the equipment in the casing 13 constituting the outer shell is less likely to get wet.
The water discharged from the drain 51 is received by a drain pan 81 arranged at the lower part.

In the embodiment described above, the water guide member 70 is disposed on the bottom surface of the outer housing 30 and along the side wall of the outer housing 30.
This location has the most chance of contact with the condensed water 45 and is recommended. That is, as a rule of thumb, the water vapor in the inter-wall space 32 is likely to condense on the inner surface of the outer housing 30, and often flows along the inner surface of the outer housing 30.
In this embodiment, since the water guiding member 70 is located at a position along the side wall of the outer housing 30, there are many opportunities to contact the water flowing down the inner surface of the outer housing 30, and the condensed water 45 can be easily captured.
In this embodiment, the water guide member 70 is installed around the inner periphery of the outer casing 30, but the water guide member 70 is not necessarily installed along the entire side wall.

Since water vapor is likely to condense on the outer peripheral surface of the inner housing 31, a water guiding member 70 may be provided at a position in contact with the outer peripheral surface of the inner housing 31 as shown in FIG.
Further, as shown in FIG. 12B, the water guide member 70 may be provided so as to contact both the inner wall of the outer casing 30 and the outer peripheral surface of the inner casing 31. Further, as shown in FIG. 12C, a water guide member 70 may be provided at the center of the bottom surface of the outer housing 30.
In the example shown in FIG. 12C, the water guide member 70 is provided on the bottom surface of the outer housing 30 and in the most part of the lower portion of the inner housing 31, but the range in which the water guide member 70 is provided is narrower. May be. In other words, the water guide member 70 may be provided only on a part of the bottom of the inner casing 31 on the bottom surface of the outer casing 30. Of course, in addition to the position along the side wall of the outer casing 30 as shown in FIG. 4, the water guiding member 70 may be provided at the lower portion of the inner casing 31. That is, the water guide member 70 may be provided at a plurality of locations.

As shown in FIG. 12 (d), the water guide member 70 may be provided on the entire bottom surface of the inter-wall space 32.
However, even though the water guiding member 70 has heat insulating properties, the heat insulating properties are inferior to the heat insulating material 33 filled in other parts, and the heat insulating properties are further reduced by absorbing water. It is not preferable to make it too wide.
Further, as shown in FIGS. 4, 12 (a), 12 (b), and 12 (c), a heat insulating material 33 such as foamed resin is provided between the bottom surface of the inner housing 31 and the bottom surface of the outer housing 30. It is desirable that there is.

The water guide member 70 is preferably connected in a ring shape or a single member, but may be divided. When the water guide member 70 having a structure divided into a plurality of pieces is employed, it is desirable that a part of each divided piece reaches the vicinity of the drain port 51.
Moreover, when employ | adopting the water guide member 70 of the structure divided | segmented into the multiple piece, one piece of water guide member piece may be connected with the drain outlet 51 indirectly through another water guide member piece.

In the embodiment described above, glass wool is employed as the water guiding member 70. Glass wool is a material that can contain water, has high water absorption and water retention properties, has heat insulation properties, and is suitable as a material for the water guide member 70.
However, the present invention is not limited to this configuration, and may be fibers of other materials. For example, water-containing natural fibers such as cotton, hemp, and palm may be used as the water guide member 70, and water-containing synthetic fibers may be used as the water guide member 70.
Moreover, the form of the water guide member 70 is not limited to fibers, and may be a block shape. For example, an open-cell foamed resin that can contain water may be used as the water guide member 70. Further, a water-containing material that does not have a fixed shape such as powder or granules may be used as the water guide member 70.

In the embodiment described above, glass wool is used in a bare state as the water guide member 70, but a water guide member provided with a water retaining member in a tube or a cover may be used as the water guide member.
For example, as shown in FIG. 13A, there is a dome-shaped protective member having a hollow inside, and a water passage member 82 through which water can pass, and a fiber bundle 83 is provided therein. It is good also as what was put in as the water conveyance member 88. FIG.
Alternatively, as shown in FIG. 13B, a water flow path may be secured by a flow path forming member 85 such as a semi-tubular member, and this may be used as the water guide member 86. The flow path forming member 85 has an opening 87. Water can be introduced inside. The condensed water introduced into the flow path forming member 85 passes through the internal cavity and is drained from the drain port 51.

In the embodiment described above, the swing type check valve 75 is provided outside the drain port 51, but the structure of the check valve 75 is arbitrary.
In the embodiment described above, the drain port 51 is provided on the vertical surface of the lower structure 53. The swing piece 77 of the check valve 75 needs to be pressed against the drain 51 provided on the vertical surface, and a weight member 80 is provided on the swing piece 77 as means for biasing the swing piece 77.
However, the present invention is not limited to this configuration, and the swing piece 77 may be pressed against the drain port 51 by another biasing force such as a spring.
A part of the side wall of the lower structure 53 may be an inclined surface, and the drain port 51 may be provided on the inclined surface. The position of the drain outlet 51 may be a low position in the inter-wall space portion 32, and may be provided on the bottom plate 42 of the main body box 40.
Further, the check valve 75 is not essential, and the drain port 51 may be opened.

  In the embodiment described above, since the heat insulating material 33 is obtained by foaming and curing a urethane raw material in the inter-wall space portion 32, the inner wall of the inter-wall space portion 32 and the heat insulating material 33 are integrally coupled. The Although this configuration is recommended, for example, a separately formed heat insulating plate may be placed in the inter-wall space portion 32.

  Although the embodiment described above is a three-tank type thermal shock test apparatus, the present invention is not limited to this configuration. For example, a two-tank type having a high temperature side test chamber and a low temperature side test chamber 3 tank type with high temperature side test room, normal temperature test room, and low temperature side test room, and has a test object moving means for moving the test object, and the test object is moved between the test chambers and the thermal shock May be provided.

Furthermore, the present invention can also be applied to a structure in which the inside of the heat insulating casing 2 is partitioned into the test chamber 3 and the air conditioning chamber 91 as in the environmental test apparatus 90 shown in FIG.
In short, the present invention can be widely applied to an environmental test apparatus in which a part or all of the region in the heat insulating casing 2 may be in a low temperature state.

As one form of the environmental test apparatus, there is an environmental test apparatus 96 in which a heat insulating casing 92 constituting the test chamber 3 and a heat insulating casing 95 constituting the air conditioner 93 are separated as shown in FIG. In the environmental test apparatus 96, the test chamber 3 and the air conditioner 93 are connected by a duct 97 or the like. The present invention is applicable to this type of environmental test apparatus.
In this case, the present invention can be applied to the heat insulating casing 95 of the air conditioner (environment test air conditioner) 93. Further, the present invention can be applied to the heat insulating casing 92 that constitutes the test chamber 3 of the environmental test apparatus 96.

DESCRIPTION OF SYMBOLS 1,90,96 Environmental test apparatus 2 Heat insulation housing | casing 30 Outer housing | casing 31 Inner housing | casing 32 Space part 33 between heat insulation materials 35 Inner board 36 Outer board 40 Main body box 51 Drain outlet 52 Upper structure 53 Upper structure 55 Bottom board 70, 86, 88 Water guide member 75 Check valve 93 Air conditioner (Air conditioner for environmental test)

Claims (12)

An environmental test apparatus having a heat insulation housing and placing a test object in the heat insulation housing to perform a predetermined test, wherein the wall of the heat insulation housing has an inner plate and an outer plate, In an environmental test apparatus in which a heat insulating material is present in a space between walls formed between a plate and an outer plate, and a part or all of the region in the heat insulating housing may be in a low temperature state.
An environment characterized in that there is a drain outlet on the outer plate, a water guide member capable of containing water and / or water passing is incorporated in the space between the walls, and a part of the water guide member reaches the vicinity of the drain outlet. Test equipment. An environmental test apparatus that has a heat insulation case and places a test object in the heat insulation case and performs a predetermined test, the heat insulation case having an inner case and an outer case, In an environmental test apparatus in which there is a heat insulating material in the space between the walls formed between the body and the outer housing, and a part or all of the region in the heat insulating housing may be in a low temperature state,
A drainage port is provided in the outer casing, and a water guide member capable of containing water and / or water is incorporated in the space between the walls, and a part of the water guide member reaches the vicinity of the drain port. Environmental test equipment.   The environmental test apparatus according to claim 1, wherein the water guide member is a water-containing fiber.   The environmental test apparatus according to any one of claims 1 to 3, wherein the water guide member is water-containing and is a heat insulating material different from most of the heat insulating materials arranged in the space between the walls.   5. The environmental test apparatus according to claim 1, wherein the water guide member is glass wool, and most of the heat insulating material disposed in the space between the walls is a foamed resin.   The heat insulating casing includes an inner casing and an outer casing, the space between the walls is present between the inner casing and the outer casing, the outer casing includes a bottom surface portion, and the water guide The environmental test apparatus according to claim 1, wherein the member is disposed on a bottom surface portion of the outer casing.   The heat insulating casing has an inner casing and an outer casing, and the space between the walls exists between the inner casing and the outer casing, and the outer casing has at least one side surface. The environmental test apparatus according to claim 1, wherein the water guide member is disposed along at least one side surface portion.   The heat insulating casing has an inner casing and an outer casing, and the space between the walls exists between the inner casing and the outer casing. The outer casing has a bottom surface portion and a plurality of side surface portions. The environmental test apparatus according to claim 1, wherein the water guide member is disposed along a corner formed by a bottom surface portion and a plurality of side surface portions.   The heat insulating casing includes an inner casing and an outer casing, and the space between the walls exists between the inner casing and the outer casing. The bottom of the outer casing includes a bottom plate portion and the bottom plate. A tray-like member having a side wall that surrounds the portion and has a side wall raised from the bottom plate portion is formed, and the tray-like member is formed by a single seamless plate. The environmental test apparatus according to any one of 1 to 8.   10. The check valve according to claim 1, wherein a check valve that allows a flow of fluid from the space between walls to the outside and prevents a reverse flow is provided at the drainage port. 11. Environmental test equipment.   The environmental test apparatus according to claim 10, wherein the check valve is a swing type check valve. An air conditioner for an environmental test that has a heat insulating housing, and is provided with at least a cooler in the heat insulating housing and capable of supplying air adjusted to a low temperature. In an environmental test air conditioner that has a plate, there is a heat insulating material in a space between walls formed between the inner plate and the outer plate, and a part or all of the region in the heat insulating housing may be in a low temperature state. ,
An environment characterized in that there is a drain outlet on the outer plate, a water guide member capable of containing water and / or water passing is incorporated in the space between the walls, and a part of the water guide member reaches the vicinity of the drain outlet. Air conditioner for testing.

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