CN108693063B

CN108693063B - Environmental test device

Info

Publication number: CN108693063B
Application number: CN201810247067.3A
Authority: CN
Inventors: 渡边正和; 谷口修一
Original assignee: Espec Corp
Current assignee: Espec Corp
Priority date: 2017-03-29
Filing date: 2018-03-23
Publication date: 2021-05-14
Anticipated expiration: 2038-03-23
Also published as: CN108693063A; DE102018106801A1; DE102018106801B4; JP2018169213A; JP6660335B2

Abstract

The invention provides an environment test device which is not easy to damage a connecting part connecting an inner wall part and an outer wall part. The test chamber (5) has a test chamber body (21) having an opening (17) on one surface and a door member (20) for opening and closing the opening (17). At least a part of the test chamber main body (21) is covered by a heat insulating wall, at least a part of the heat insulating wall of the opening of the test chamber main body (21) has an inner wall member (26), an outer wall member (27), a heat insulating material (25), and a connecting member (40), the heat insulating material (25) is disposed in a space formed between the inner wall member (26) and the outer wall member (27), and the inner wall member (26) and the outer wall member (27) are connected by the connecting member (40). The connecting member (40) forms a frame having a plurality of side portions and an open center. A slit is formed in the connecting member (40).

Description

Environmental test device

Technical Field

The present invention relates to an environmental test apparatus having a test chamber and adjusting the temperature and humidity of the test chamber to target temperatures and humidities.

Background

An environmental test apparatus is provided as an apparatus for testing the performance, durability, and the like of a product, a raw material, or the like. The environmental test apparatus is an apparatus having a test chamber for placing a test object thereon and having a function of adjusting the temperature or humidity in the test chamber to a desired test environment. In order to evaluate the performance, durability, and the like of the test object, the inside of the test chamber may be controlled to a low temperature environment or conversely to a high temperature environment.

In the environmental test apparatus, an environment different from the outside may be created in the test room, and therefore the test room is often covered with a heat insulating wall.

The heat insulating wall of the environmental test apparatus is often of a double-layer structure, and a heat insulating material such as glass wool is often built in a space between the heat insulating wall and the heat insulating wall.

That is, the heat insulating wall has a double-layer structure including an inner wall member constituting an inner surface of the test chamber and an outer wall member constituting an outer contour of the test chamber, and has a heat insulating material-filled space therebetween. The heat insulating material-filled space is filled with a heat insulating material such as glass wool.

The laboratory is preferably shielded from the outside and the air is preferably prevented from entering and exiting the laboratory. On the other hand, the subject needs to be accessed in the laboratory. Therefore, a door member is provided in the laboratory.

That is, most laboratories have the following structure: the test chamber comprises a test chamber body having an opening on one surface thereof, and a door member provided in the opening of the test chamber body, and the opening of the test chamber body is opened and closed by the door member.

Since the opening of the laboratory main body needs to be sealed with a heat insulating material, it is necessary to connect the inner wall member and the outer wall member.

Here, since the environmental test apparatus generates a high-temperature environment or a low-temperature environment in the test chamber, the inner wall member of the test chamber is in a high-temperature state or a low-temperature state depending on the environment generated in the test chamber.

In contrast, the outer wall member is often exposed to the outside, and therefore is in a normal temperature state.

Therefore, if the inner wall member and the outer wall member are directly connected, heat or cold heat of the inner wall member is conducted to the outer wall member, and heat or cold heat in the test chamber is radiated to the outside.

In the above-described environmental test apparatus, the environment in the test chamber may be set to a high temperature or a low temperature, and the environment may be maintained in this state, so that heat conduction through the connection portion between the inner wall member and the outer wall member cannot be ignored.

In order to solve this problem, in the environmental test apparatus disclosed in patent document 1, the inner wall member and the outer wall member are connected by a connecting member made of a material having low thermal conductivity.

Documents of the prior art

Patent document

Patent document 1: japanese unexamined patent publication No. 2013-72648

Disclosure of Invention

Technical problem to be solved by the invention

In the environmental test apparatus disclosed in patent document 1, heat transfer between the inner wall member and the outer wall member is small, and the heat insulating performance of the test chamber is high.

However, the connecting member may be broken, although it is rare.

In particular, when the temperature change in the test chamber is fast, when the set temperature in the test chamber is high, or when the set temperature of the test temperature is low, the damage is often caused. In addition, the broken position of the connecting member is often a corner portion of the connecting member.

The cause of breakage of the connecting member is considered to be due to the difference in expansion rate between the inner wall member and the connecting member. The inner wall member is often made of metal such as stainless steel.

On the other hand, the connecting member is often made of resin.

In the calculation by the present inventors, assuming that the length of one side of the inner wall member and the length of one side of the connecting member are 1000mm in total, and assuming that the temperature in the test chamber is increased from 25 degrees celsius to 180 degrees celsius, a dimensional difference of 0.42mm occurs between the two due to the difference in linear expansion coefficient. Therefore, it is predicted that the connecting member is subjected to stress to cause cracks.

The inner wall member and the connecting member have different temperature rise curves, and the temperature rise method and the cooling method are different. Therefore, it is possible to predict that a pressure is applied to the connecting member due to a momentary difference in the elongation or contraction.

Further, it is predicted that the deformation of the outer wall member and the inner wall member due to heat is also one of the causes of the occurrence of the crack.

That is, since the outer wall member is in contact with the outside in many cases, the temperature thereof is close to the outside temperature and the outer wall member is kept in a constant shape.

In contrast, the inner wall member is exposed to a high-temperature environment or a low-temperature environment, and thus expands or contracts due to heat. Therefore, the connecting portion of the inner wall member and the connecting member moves due to expansion and contraction of the inner wall member, and the connecting member connecting the inner wall member and the outer wall member is subjected to stress. Further, it is expected that cracks will occur in the connecting member after long-term use.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide an environmental test apparatus in which a connecting member connecting an inner wall member and an outer wall member is not easily broken.

Means for solving the problems

An environmental test apparatus according to an aspect of the present invention is an environmental test apparatus including a test chamber in which a test object is arranged, the test chamber being capable of generating a desired environment therein, the test chamber including a test chamber body having at least one surface thereof an opening, and a door member for opening and closing the opening, at least a part of the test chamber body being covered with an insulating wall, the insulating wall of at least a part of the opening of the test chamber body including an inner wall member, an outer wall member, an insulating material, and a connection member, the insulating material being arranged in a space formed between the inner wall member and the outer wall member, the inner wall member and the outer wall member being connected by the connection member, and the connection member forming a frame having a plurality of side portions and a central opening, wherein a slit or a notch is formed in the connection member.

Here, the slit includes only a slit and substantially zero width.

In the environment testing apparatus of the present invention, the connecting member is provided with a slit or a notch, and therefore, each side is movable to a certain extent. Therefore, stress applied to the connecting member is relieved, and cracks are less likely to occur.

Preferably, the slit or the notch is located at a corner of the frame, the slit or the notch opens to the inner wall member side of the test chamber main body, the outer wall member side is closed, and the slit or the notch extends in an oblique direction with respect to each side portion.

Preferably, there is a screw insertion hole communicating with the slit or cut.

The gap or cut is preferably filled with a sealing material.

Preferably, a covering element is provided in front of the slit or cut-out.

Preferably, the connecting member has a cross-sectional shape of a concave-convex shape, and a periphery of the central opening is a concave portion, and the slit or the notch is formed in the concave portion.

Preferably, the connecting member has a cross-sectional shape of a concave-convex shape, and has an inner concave portion, an intermediate convex portion, and an outer concave portion from the opening side of the center toward the outside, and the slit or the notch is formed on the way from the opening side of the center toward the intermediate convex portion.

Preferably the depth of the slit or cut is of a widened shape.

Preferably the slits or cuts have substantial gaps.

Preferably, the inner wall member has a bent portion to which the connecting member is fixed, and the slit overlaps the bent portion.

Effects of the invention

The connecting member for connecting the inner wall member and the outer wall member of the environment testing apparatus according to the present invention is less likely to be broken.

Drawings

Fig. 1 is a perspective view of an environmental test apparatus according to an embodiment of the present invention, showing a state in which a door member is opened.

Fig. 2 is a sectional view schematically showing the internal structure of the environmental test apparatus of fig. 1.

Fig. 3 is an exploded perspective view of a laboratory main body of the environmental testing apparatus of fig. 1.

Fig. 4 is a perspective view of a connecting member used in the environment testing apparatus of fig. 1.

Fig. 5 (a) is a partial front view showing an enlarged corner portion of the connection member of fig. 4, and (b) is a partial front view showing a relationship between the slit and the laboratory main body in the same portion, and is a view in which the connection member is removed from (a) and the slit is marked with a two-dot chain line.

Fig. 6 is a sectional view a-a of an opening portion of the test chamber body of fig. 1.

FIG. 7 is an enlarged sectional perspective view of a corner of the opening portion of the test chamber main body of FIG. 1, showing a state where the cover member is removed.

Fig. 8 (a), (b), and (c) are explanatory views showing behaviors of corners of the opening portion of the laboratory main body of fig. 1.

Fig. 9 is a front view of a corner of a connecting member used in another embodiment of the present invention.

Fig. 10 is a front view of a corner of a connecting member used in another embodiment of the present invention.

Description of the reference numerals

1 environmental test device

2 Heat insulation wall

5 laboratory

17 opening part

20 door component

21 laboratory body

22 inner side shell

23 outer shell

25 heat insulating material

26 inner wall member

27 outer wall member

30 space filled with heat insulating material

40 connecting part

41. 42 longitudinal edge (edge)

43. 45 horizontal side (edge)

50 gap

51 screw insertion hole

53 sealing Material

60 covering member

70. 71 cutting.

Detailed Description

Embodiments of the present invention are further described below.

First, a basic configuration of the environmental test apparatus 1 according to the present embodiment will be described. As shown in fig. 1, the environmental test apparatus 1 of the present embodiment is divided into an upper-side laboratory area 100 and a lower-side machine area 101.

As shown in fig. 2, the heat insulating groove 3 covered with the heat insulating wall 2 is provided in the laboratory area 100. The heat insulation tank 3 is composed of a laboratory body 21 and a door member 20. A test chamber 5 is formed in a part of the heat insulation tank 3. The test chamber 5 is a space in which a test object is placed. The test chamber 5 is a space surrounded on six sides by the inner wall of the test chamber main body 21 (more specifically, the inner partition 36 is the rear wall of the test chamber 5) and the door member 20.

Specifically, the test chamber 5 is a part of an insulating space formed by surrounding six surfaces with the test chamber body 21 and the door member 20.

The environmental test apparatus 1 further includes an air conditioner 10 and a fan 11. The air conditioner 10 is composed of a humidifying device 6, a cooling device 7, and a heater 8.

The environmental test apparatus 1 includes an air-conditioning duct 15 that communicates with the test room 5 in a ring shape, and the air-conditioning duct 15 contains the air-conditioning equipment 10 and the fan 11.

The air-conditioning duct 15 is formed in a part of the heat insulation tank 3, and communicates with the laboratory 5 at two positions, namely, an air blowing portion 16 and an air introduction portion 18.

Therefore, when the fan 11 is started, the air in the laboratory 5 is introduced into the air-conditioning duct 15 from the air introduction portion 18. The air-conditioning duct 15 is in a ventilation state, and the air conditioner 10 performs heat exchange or humidity adjustment by contacting with air, and blows the adjusted air from the air blowing unit 16 into the laboratory 5.

In addition, a temperature sensor 12 and a humidity sensor 13 are provided in the vicinity of the air blowing portion 16 of the air-conditioning duct 15.

When the environment testing apparatus 1 is used, the air conditioning facility 10 is controlled so that the fan 11 is operated to ventilate the air conditioning duct 15, and the detection values of the temperature sensor 12 and the humidity sensor 13 are brought close to the temperature and humidity of the set environment.

As a result, a desired environment can be generated in the test chamber 5.

Next, the laboratory main body 21 of the environmental test apparatus 1 according to the present embodiment will be described. The laboratory main body 21 has left and

right side walls

31, 32, a top wall 33, and a bottom wall 35 as inner surfaces, and is largely open on the front side. A door member 20 is attached to the opening 17 of the test chamber body 21, and the opening 17 of the test chamber body 21 is closed by the door member 20.

As shown in fig. 3, the laboratory main body 21 has a double-layered structure in which an inner case 22 and an outer case 23 are nested. A heat insulating material 25 such as glass wool is filled between the both. Therefore, the cross-sectional shapes of the left and

right side walls

31, 32, the top wall 33, the bottom wall 35, and the like have a shape having a heat insulating material filling space 30 and a heat insulating material 25 filled in the heat insulating material filling space 30 as shown in fig. 6, and the heat insulating material filling space 30 is surrounded by the inner wall member 26 formed by the inner case 22 and the outer wall member 27 formed by the outer case 23.

In the present embodiment, the inner case 22 and the outer case 23 are both made of metal, more specifically, stainless steel.

In addition, a connection member 40 is provided between the inner case 22 and the outer case 23 at the opening 17 of the laboratory main body 21, and the open ends of the inner case 22 and the outer case 23 are connected to each other.

Therefore, as shown in fig. 6, the cross-sectional shape of the opening 17 of the test chamber main body 21 is such that the end of the inner wall member 26 formed of the inner case 22 and the end of the outer wall member 27 formed of the outer case 23 are connected by the connecting member 40, thereby closing the heat insulating material-filled space 30.

Next, the connection member 40 will be explained. The connecting member 40 is made of, for example, a synthetic resin such as an unsaturated polyester resin. The thermal conductivity of the connecting member 40 is lower than that of metal.

The front shape of the connecting member 40 is a frame-like body like a frame as shown in fig. 3 and 4. That is, the connecting member 40 is a rectangular frame including two rows of vertical sides (sides) 41 and 42 arranged in parallel and lateral sides (sides) 43 and 45 connecting both ends of the

vertical sides

41 and 42, and has a large opening 47 at the center.

The cross-sectional shape of each side of the connecting member 40 has a continuous step-like cross-sectional shape as shown in fig. 6. That is, the connecting member 40 has an inner concave portion 55, an intermediate convex portion 56, and an outer concave portion 57 formed in this order from the central opening 47 side to the outer side.

In the present embodiment, as shown in fig. 4, slits 50 are formed at each corner of the connecting member 40. The slits 50 are formed at the connecting portions between the two rows of

longitudinal sides

41, 42 and the

transverse sides

43, 45, and are corners of four corners of the connecting member 40.

As described above, the connecting member 40 has a continuous stepped cross-sectional shape including the inner concave portion 55, the intermediate convex portion 56, and the outer concave portion 57. The slit 50 is formed in the inner recess 55.

The cross-sectional shape of the connecting member 40 is a concave-convex shape having an inner concave portion 55, an intermediate convex portion 56, and an outer concave portion 57, and the slit 50 is formed from the central opening 47 to the intermediate convex portion 56. The slit 50 does not reach the intermediate protrusion 56.

Preferably, the slit 50 is formed as a substantially thin gap.

Slit 50 is open on opening 47 side of connection member 40 and closed on the back side. When the state of the connection member 40 attached to the test chamber main body 21 is taken as a reference, the slit 50 opens on the inner wall member 26 side of the test chamber main body 21 and closes on the outer wall member 27 side.

The slot 50 has an arbitrary slot width.

The deepest portion of the slit 50 is slightly enlarged in diameter to form a screw insertion hole 51 (see fig. 5). In other words, the screw insertion hole 51 communicates with the slit 50.

The slit 50 is inclined at an angle of about 45 degrees with respect to any side, and extends in an inclined direction.

The slit 50 is preferably formed so that the diameter increases at the deepest portion and becomes wider at the deepest portion. Further, when the slit is provided instead of the slit, a shape that is wide in depth is also preferable.

As shown in fig. 3 and 6, the connection member 40 is disposed on the front surface of the opening 17 of the test chamber main body 21, is positioned in the gap between the inner case 22 and the outer case 23, and is fixed so as to be filled with the heat insulator 25 and close the heat insulator filled space 30. That is, the outer edge of the connecting member 40 is set to a size corresponding to the outer case 23, and the inner edge is set to a size corresponding to the inner case 22.

As shown in fig. 6, the inner case 22 and the outer case 23 have bent

portions

58 and 65 bent toward the front side of the test chamber main body 21, and the connection member 40 is fixed to the

bent portions

58 and 65 by a coupling mechanism such as a screw.

In the present embodiment, the bent portion 58 of the inner case 22 is in contact with the inner recess 55 of the connection member 40. Further, the bent portion 65 of the outer case 23 is in contact with the outer recess 57 of the connection member 40.

As described above, the slit 50 of the connection member 40 is located in the inner recess 55, and as shown in fig. 5, substantially the entire contact area (contact width) between the connection member 40 and the inner case 22 overlaps with the slit 50.

Further, the slits 50 at the corners of the connecting member 40 are filled with a sealing material 53 and subjected to joint leveling treatment. The sealing material 53 is a caulking sealing material such as silicone resin. Therefore, the gap 50 is filled with the caulking material, and there is no air permeability between the inside and the outside. However, the sealing material 53 is flexible and has a larger deformation energy than the connecting member 40.

In the present embodiment, a covering member 60 (see fig. 7 and 8) is provided at a corner portion of the connection member 40, and the outside of the slit 50 is covered with the covering member 60. Therefore, the slit 50 is covered by the covering member 60, and the appearance is improved. The sealing material 67 is attached to the entire periphery of the covering member 60.

The covering member 60 is a plate having a front face shape of a substantially isosceles triangle, and is made of a resin such as unsaturated polyester. The side corresponding to the base of the isosceles triangle is arc-shaped.

The covering member 60 is provided with a through hole 61 at a position near the apex of the triangle.

As shown in fig. 7, the covering member 60 is positioned at a corner of the connection member 40, and a screw 62 is inserted through a through hole 61 of the covering member 60 and a screw insertion hole 51 of the connection member 40. The tip of the screw 62 reaches the inner case 22, and engages with the inner case 22.

Thus, the covering member 60 is attached to the corner of the connecting member 40 with one screw. Therefore, as shown in fig. 8, when both wings of the covering member 60 are defined as

wing portions

63a and 63b with a vertical line 66 extending from the apex to the base as a boundary, one wing portion 63a is positioned to cover the longitudinal side or the lateral side of the connecting member 40, and the other wing portion 63b covers the lateral side or the longitudinal side of the connecting member 40. The

wing portions

63a and 63b of the cover member 60 are joined to the connection member 40 with a sealing material 67, and have deformability while maintaining airtightness.

Next, the function of the connection member 40 of the environment testing apparatus 1 of the present embodiment will be described.

In the connection member 40 of the present embodiment, the outer edge is connected to the outer wall member 27 formed of the outer case 23, as in the conventional art. In addition, the inner edge of the connecting member 40 is connected to the inner wall member 26 of the inner case 22, as in the conventional art.

Therefore, when the inner case 22 is deformed by the temperature in the test chamber 5, the connecting member 40 receives a force from the inner case 22. However, in the present embodiment, the slit 50 is provided at the corner where stress can be said to be most concentrated. Therefore, stress concentration at the corner can be relieved, and damage can be avoided.

For example, when the sides of the opening end of the inner case 22 are deformed to be narrowed inward as shown by the arrows in fig. 8 (b), the corners of the connecting member 40 are shrunk and deformed by the slits 50 on the opening end side, and the stress concentration is relieved. Therefore, the connecting member 40 is not easily broken.

On the contrary, when the sides of the opening end of the inner case 22 are deformed to be widened outward as shown by the arrows in fig. 8 (c), the corners of the connecting member 40 are deformed to be widened toward the opening end side by the slits 50, and the stress concentration is relieved. Therefore, the connecting member 40 is not easily broken.

In the present embodiment, the

wing portions

63a and 63b of the covering member 60 are joined to the connecting member 40 with the sealing member 67, and even if the gap portion is opened or closed, the sealing member 67 has flexibility and can follow the deformation, and the covering member 60 can maintain the sealing property without being damaged. Therefore, even if the seal of the slit portion is broken, the cover portion can prevent air from flowing.

Further, since the sealing material 53 is filled in the gap 50, air can be prevented from flowing through the gap 50 to the inside and outside of the heat insulating material-filled space 30. Since the sealing material 53 has flexibility, even if the slit 50 is opened or closed, the change can be followed, and air can be prevented from flowing through the slit 50 to the inside and outside of the heat insulating material-filled space 30.

Even if the sealing material 53 is broken due to some cause, the covering member 60 is provided on the front surface of the slit 50, so that a certain degree of airtightness can be ensured.

In the above embodiment, the covering member 60 covers the slit 50, but the covering member 60 is not essential and may be omitted.

In the above embodiment, the slits 50 are provided at the four corners of the connection member 40, but the slits 50 are not necessarily provided at all the corners. The position of the slit 50 is not limited to the corner, and may be located on the side.

In the present embodiment, the slit 50 is provided at a position close to the inner wall member 26 side. The reason for this is that: the inner case 22 is exposed to high or low temperatures and is therefore easily deformed, and the slit 50 is provided at a position close to the inner wall member 26 so as to follow the deformation of the inner case 22. However, the present invention is not limited to this configuration, and the slit 50 may be provided in both the vicinity of the inner wall member 26 and the vicinity of the outer wall member 27, or may be provided only in the vicinity of the outer wall member 27.

In addition, the slit 50 does not necessarily have to be open at one end.

Further, providing the notch 70 as shown in fig. 9 and 10 instead of the slit 50 may also contribute to stress relief.

In the manner shown in fig. 9, the slit 70 is separated from the screw insertion hole 51. In the embodiment shown in fig. 10, the notch 71 is deeper and is integrally connected to the screw insertion hole portion 72.

In the above-described embodiment, the covering member 60 is fixed by providing the screw insertion hole 51 or the screw insertion hole 72 at the corner of the connection member 40, but the position of the screw insertion hole 51 or the screw insertion hole 72 is not limited, and may be at another position. The method of fixing the cover member 60 and the method of fixing the connection member 40 are not limited to screws, and other fasteners such as rivets may be used. Further, the fixing may be performed by an adhesive, solder, or the like without using a bonding member.

Claims

1. An environmental test device which characterized in that:

the test chamber comprises a test chamber body having an opening at least on one surface and a door member for opening and closing the opening, at least a part of the test chamber body is covered by an insulating wall, the insulating wall of at least a part of the opening of the test chamber body comprises an inner wall member, an outer wall member, an insulating material, and a connecting member, the insulating material is disposed in a space formed between the inner wall member and the outer wall member, the inner wall member and the outer wall member are connected by a connecting member, the connecting member forms a frame having a plurality of side portions and an opening at the center,

slits or cutouts are formed in the connecting member.

2. The environmental test apparatus of claim 1, wherein:

the slits or cuts are located at the corners of the frame, open on the inner wall member side of the laboratory main body, closed on the outer wall member side, and extend in an oblique direction with respect to any of the side portions.

3. The environmental test apparatus of claim 1 or 2, wherein:

has a screw insertion hole communicating with the slit or cut.

4. The environmental test apparatus of claim 1 or 2, wherein:

the gap or the cut is filled with a sealing material.

5. The environmental test apparatus of claim 1 or 2, wherein:

a covering member is provided in front of the slit or cut.

6. The environmental test apparatus of claim 1 or 2, wherein:

the connecting member has a cross-sectional shape of a concave-convex shape, and a recess is formed around the central opening, and the slit or the notch is formed in the recess.

7. The environmental test apparatus of claim 1 or 2, wherein:

the connecting member has a cross-sectional shape of a concave-convex shape, and has an inner concave portion, an intermediate convex portion, and an outer concave portion from the opening side of the center toward the outside, and the slit or the notch is formed on the way from the opening side of the center toward the intermediate convex portion.

8. The environmental test apparatus of claim 1 or 2, wherein:

the slit or cut is a shape which is widened deeply.

9. The environmental test apparatus of claim 1 or 2, wherein:

the slits or cuts have substantial gaps.

10. The environmental test apparatus of claim 1 or 2, wherein:

the inner wall member has a bent portion to which the connecting member is fixed, and the slit overlaps the bent portion.