JP6854694B2 - Environmental test equipment and heating equipment - Google Patents

Description

The present invention relates to an environmental test apparatus for performing a test by placing a test object in a predetermined environment. The environmental test apparatus of the present invention is suitable as an apparatus for performing a test for changing the temperature in a test chamber, such as a temperature cycle test and a thermal impact test (also referred to as a cold impact test).
The present invention also relates to a heating device used in an environmental test device.

An environmental test device such as Patent Document 1 is known as a device for testing the performance and durability of products and materials. The environmental test apparatus is provided with a test chamber on which the test object is placed, and adjusts the temperature and humidity of the test chamber to a desired test environment.

FIG. 1 is a conceptual representation of a typical environmental test apparatus.
The basic configuration of the environmental test apparatus 100 is as shown in FIG. 1, and has a heat insulating tank 3 covered with a heat insulating wall 2. A test chamber 5 is formed in a part of the heat insulating tank 3. The test room 5 is a space in which the test object 18 is installed.
The environmental test device 100 further includes an air conditioner 17 and a blower 10. The air conditioner 17 is composed of a humidifying device 6, a cooling device 7, and a heating device 101.

The environmental test apparatus 100 has an air-conditioning ventilation passage 15 that communicates with the test chamber 5 in a ring shape, and the air-conditioning equipment 17 and the blower 10 described above are built in the air-conditioning ventilation passage 15.

The air-conditioning ventilation passage 15 is formed in a part of the heat insulating tank 3 and communicates with the test chamber 5 at two locations, an air blowing portion 16 and an air introducing portion 25.
Therefore, when the blower 10 is started, the air in the test chamber 5 is introduced from the air introduction unit 25 into the air conditioning ventilation passage 15. Then, the air-conditioning ventilation passage 15 is in a ventilation state, air comes into contact with the air-conditioning equipment 17, heat exchange and humidity adjustment are performed, and the adjusted air is blown out from the air blowing portion 16 into the test chamber 5.
Further, a temperature sensor 12 and a humidity sensor 13 are provided in the vicinity of the air blowing portion 16 of the air conditioning ventilation passage 15.
When using the environmental test device 100, the blower 10 is operated to bring the air-conditioned ventilation passage 15 into a ventilation state, and the air-conditioning is performed 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 17.

That is, by operating the blower 10, the air in the test chamber 5 is introduced into the air-conditioning ventilation passage 15 from the air introduction unit 25, passes through the air-conditioning equipment 17 in the air-conditioning ventilation passage 15, and the temperature and humidity are adjusted. Then, the air whose temperature and humidity have been adjusted is returned from the air blowing unit 16 to the test chamber 5, and an environment of a desired temperature and humidity is created in the test chamber 5.

A temperature cycle test is known as one of the environmental tests.
In the temperature cycle test, an environment in which the temperature changes is artificially created, the test object is subjected to thermal stress in this environment, and the change in the test object is observed.

When the temperature cycle test is performed using the environmental test apparatus 100 shown in FIG. 1, the test object 18 is placed in the test chamber 5 and the environment in the test chamber 5 is changed from a high temperature state to a low temperature state. Further, the temperature is changed from the low temperature state to the high temperature state, and this is repeated over a certain number of times.

Japanese Unexamined Patent Publication No. 2016-102681

The present inventors have prototyped the heating device 101 used in the environmental test device 100, which has the structures shown in FIGS. 13, 14, and 15.
The prototype heating device 101 uses a heating element 103 such as a heating wire as a heat source. The heating wire not only emits high heat, but also allows current to flow on the surface. Therefore, direct contact with other members may cause electric leakage or short circuit.
Therefore, in the prototype heating device 101, the electric heating element 103 is held by the insulator 105 in order to prevent a short circuit or the like.
As shown in FIG. 13, the prototype heating device 101 has a frame 102 constituting an outer frame, and insulators 105a to 105e are fixed inside the frame 102. Due to the drawing, the number of insulators 105 is smaller than the actual number.

The insulator 105 is a plate-shaped insulating material, and is provided with a through hole 107 through which a support shaft 112 for fixing is inserted. A terminal 106 is provided on the insulator 105 at one end. The other insulator 105 is provided with a through hole 110 for inserting an electric heating element.
Further, the frame 102 has side plates 111a and 111b facing each other. The side plates 111a and 111b are provided with through holes 113 through which the fixing support shaft 112 is inserted.
The support shaft 112 is a long male threaded member, and male threads are formed on the outer periphery of the bar material over both ends. The support shaft 112 is made of a metal such as stainless steel.

In the heating device 101, the insulators 105 are arranged in series and in parallel between the side plates 111a and 111b of the frame 102, and the support shaft 112 for fixing to the through holes 113 of the side plates 111a and 111b and the through holes 107 of the insulator 105. Are in communication.
Further, between the insulators 105, a porcelain pipe 115 is inserted through the support shaft 112, and the distance between the insulators 105 is maintained.
Both ends of the support shaft 112 project from the through holes 107 of the insulators 105a and 105e provided at both ends, as shown in FIGS. 14 and 15. Then, as shown in FIG. 15, the nuts 116a and 116b are engaged with the portion of the support shaft 112 that protrudes to the outer position of the insulator 105 provided at both ends, and by tightening the two 116a and 116b. , Each insulator 105 is arranged in parallel.
Further, both ends of the support shaft 112 are inserted into through holes 113 of the side plates 111a and 111b, and two nuts 118a and 118b are engaged with the support shaft 112 with the side plates 111a and 111b interposed therebetween, respectively.

FIG. 15 shows an extracted relationship between the insulator 105, the pipe 115, the support shaft 112, and the nuts 116a and 116b of the prototype heating device 101.
As shown in FIG. 15, there is a pipe 115 between each insulator 105, and the distance between each insulator 105 is regulated by the pipe 115. Further, a series of insulators 105 and an assembly of pipes 115 are tightened with nuts 116a and 116b from both sides, and compressive stress is always applied to the insulators 105.

Both ends of the electric heating element 103 are connected to terminals 106. Further, the intermediate portion of the electric heating element 103 is inserted and supported in the through hole 110 for inserting the element provided in the insulator 105.

The environmental test device 100 using the prototype heating device 101 did not cause any major problems when the high temperature test or the low temperature test was performed, and exhibited good performance.
However, when the temperature cycle test is performed using the environmental test apparatus 100, the insulator 105 may be damaged.

As a result of examining the cause, it was found that there was a problem in the method of fixing the insulator 105.
That is, in the prototype heating device 101, as shown in FIG. 15, a plurality of insulators 105 are arranged vertically and in parallel, a pipe 115 is sandwiched between them, and a support shaft 112 is inserted into a through hole 107 of each insulator 105 to the outside. The nuts 116a and 116b are attached to and tightened. Therefore, as described above, compressive stress is always applied to the insulator 105.
Further, each insulator 105 is in a state of being rigidly attached to the support shaft 112, and has no degree of freedom.
When the temperature cycle test is performed using the environmental test device 100, the temperature of the heating device 101 rises in a high temperature environment, and cold air passes through the heating device 101 to lower the temperature of the heating device 101 in a low temperature environment.

Here, in the prototype heating device 101, the support shaft 112 is inserted through the insulator 105, and the insulator row is rigidly attached to the support shaft 112 with nuts 116a and 116b from the outside, so that the support shaft 112 is caused by a temperature change. As the insulator expands and contracts, the insulator 105 is tightened or loosened more strongly. In particular, in the prototype heating device 101, since the support shaft 112 is a metal rod such as stainless steel, the linear expansion rate is larger than that of the insulator 105, and the insulator 105 is tightened every time the temperature of the insulator 101 changes. It is expected that the insulator 105 will be repeatedly stressed and fatigue fracture will occur.

The present invention has been devised based on this finding, and an object of the present invention is to provide an environmental test apparatus in which the insulating material holding the electric heating element is not easily damaged.

The invention for solving the above-mentioned problems is an environmental test apparatus having a test chamber in which a test object is arranged and an air conditioner for controlling the temperature of the test chamber to create a desired environment in the test chamber. In an environmental test device having a heating device as one of the air conditioning devices, the heating device holds an outer frame member, a support member, an electric heating element, and an electric heating element, and the support member is inserted through the device. It has a holding insulating material having holes, the supporting member is held by the outer frame member, the supporting member is inserted into the through hole of the holding insulating material, and the outer frame member and the holding insulating material adjacent thereto are inserted. It is an environmental test apparatus characterized in that a spacing forming member is arranged between the two and the holding insulating material is positioned.
The invention according to claim 1 is an environmental test apparatus having a test chamber in which a test object is arranged and an air conditioner for adjusting the temperature of the test chamber to create a desired environment in the test chamber. In an environmental test apparatus having a heating device as one of the air conditioning devices, the heating device holds an outer frame member, a support member, an electric heating element, and the electric heating element, and the support member is inserted through the heating device. The holding insulating material having a through hole, the support member is held by the outer frame member, the support member is inserted through the through hole, and the outer frame member and the holding insulating material adjacent thereto are inserted. A gap forming member is arranged between the two, and the holding insulating material is positioned, and the distance forming member of the spacing forming member is more than the distance between the outer frame member and the holding insulating material adjacent thereto. It is an environmental test device characterized by having a shorter length.
The invention according to claim 2 is an environmental test apparatus having a test chamber in which a test object is arranged and an air conditioner for adjusting the temperature of the test chamber to create a desired environment in the test chamber. In an environmental test apparatus having a heating device as one of the air conditioning devices, the heating device holds an outer frame member, a support member, an electric heating element, and the electric heating element, and the support member is inserted through the heating device. A holding insulating material having a through hole, the support member is held by the outer frame member, the support member is inserted through the through hole, and the outer frame member and the holding insulating material adjacent thereto are inserted. A gap forming member is arranged between the two, and a gap maintaining insulating material is arranged between the holding insulating materials to position the holding insulating material, and the outer frame members face each other. has a side surface member, between the opposed side member, the overall length of the support member, wherein the thickness of the holding insulating material, the length of the interval formation member, the length of the gap maintaining insulating material It is an environmental test device characterized by being longer than the total.

In the environmental test apparatus of the present invention, the insulating material does not become rigidly attached and has some degree of freedom. Therefore, even if the support member expands or contracts due to heat, an excessive force is not applied to the insulating material, and the insulating material is prevented from being destroyed.

Wherein the support member is elongated, it is desirable that the interval formation member is fitted on said support member (claim 3).

The outer frame member has side walls facing each other, a support member is hung between the side walls, there are a plurality of the holding insulating materials, and each holding insulating material is plate-shaped and has a through hole thereof. A support member is inserted into the support member, and in the area between the holding insulating materials, the space-maintaining insulating material is attached to the support member, and the space-maintaining insulating material comes into contact with or is close to the holding insulating materials on both sides. It is desirable to do.
According to a fourth aspect of the present invention, the outer frame member has side walls facing each other, and the support member is hung between the side walls. The invention according to any one of claims 1 to 3, wherein an interval maintaining insulating material is attached to the support member, and the interval maintaining insulating material is in contact with or in close proximity to the holding insulating materials on both sides. Environmental test equipment.

Said support member is internally threaded or screw insertion hole is formed in an end portion, it is desirable that the support member threaded member from the outside of the outer frame member is inserted is attached to the outer frame member (claim 5 ).

According to the present invention, the inner dimensions of the outer frame member can be determined by the support member.

It is desirable that the length of the spacing forming member is shorter than the distance between the outer frame member and the holding insulating material adjacent thereto (claim 1 ).

According to the present invention, the degree of freedom of the insulating material can be surely secured.

The invention according to claim 6 has an outer frame member, a support member, an electric heating element, and a holding insulating material that holds the electric heating element and has a through hole through which the support member is inserted. The support member is held by the frame member, the support member is inserted into the through hole, and a space forming member is arranged between the outer frame member and the holding insulating material adjacent thereto for holding. A heating device in which the insulating material is positioned, and the length of the spacing forming member is shorter than the distance between the outer frame member and the holding insulating material adjacent thereto. is there.
The invention according to claim 7 has an outer frame member, a support member, an electric heating element, and a holding insulating material that holds the electric heating element and has a through hole through which the support member is inserted. The support member is held by the frame member, the support member is inserted into the through hole, and a space forming member is arranged between the outer frame member and the holding insulating material adjacent thereto for holding. The insulating material is positioned, the support member is held by the outer frame member, the support member is inserted into the through hole, and the outer frame member and the holding insulating material adjacent thereto are with the spacing member disposed between, said gap maintaining insulating material between the retaining insulating member is disposed, which the holding insulating material is positioned, a side where the outer frame member opposite The total length of the support member between the facing side members having the members is the sum of the thickness of the holding insulating material, the length of the spacing forming member, and the length of the spacing maintaining insulating material. It is a heating device characterized by being long.

In the environmental test apparatus of the present invention, a certain degree of freedom is secured in the insulating material that holds the electric heating element, and excessive force is not applied to the insulating material even if the support member expands or contracts. Therefore, in the environmental test apparatus of the present invention, there are few failures in which the insulating material is damaged.

It is sectional drawing which conceptually represented the environmental test apparatus of this embodiment and the prior art. It is a perspective view and the enlarged view in the circle of the perspective view of the heating apparatus adopted in the environmental test apparatus of this embodiment. It is a front view of the heating device of FIG. It is a partial cross-sectional front view which conceptually represented the main part of the heating device of FIG. (A) is an exploded perspective view conceptually showing a main part of the heating device of FIG. 2, and (b) is a posture maintaining tool composed of an interval forming member, a support member, and a tubular insulator. It is a perspective view. It is an exploded perspective view which conceptually represented the outer frame member of the heating device of FIG. 2 and the periphery of an insulator adjacent thereto. It is sectional drawing of the outer frame member of the heating device of FIG. 2 and the periphery of an insulator adjacent thereto. It is sectional drawing around the outer frame member of the heating apparatus and the insulator adjacent thereto in another embodiment of this invention. It is sectional drawing around the outer frame member of the heating apparatus and the insulator adjacent thereto in still another Embodiment of this invention. It is sectional drawing around the outer frame member of the heating apparatus and the insulator adjacent thereto in still another Embodiment of this invention. It is sectional drawing around the outer frame member of the heating apparatus and the insulator adjacent thereto in still another Embodiment of this invention. It is sectional drawing which conceptually represented the environmental test apparatus of still another embodiment of this invention. It is an exploded perspective view which conceptually represented the prototype heating device. It is a partial cross-sectional front view which conceptually represented the prototype heating device. It is an enlarged sectional view conceptually showing the fixed structure of the insulator of the prototype heating device.

Hereinafter, embodiments of the present invention will be further described.
The configuration of the environmental test apparatus 1 of the present embodiment is not much different from that of the above-mentioned prior art environmental test apparatus 100. That is, as shown in FIG. 1, the environmental test apparatus 1 has a heat insulating tank 3 covered with a heat insulating wall 2. A test chamber 5 is formed in a part of the heat insulating tank 3. The environmental test device 1 further includes an air conditioner 17 and a blower 10. The air conditioner 17 includes a humidifying device 6, a cooling device 7, and a heating device 8.
The heating device 8 is an improvement of the above-mentioned prototype.

The heating device 8 used in the present embodiment has an outer frame member 30 as shown in FIGS. 2 and 3, and 6 sets of electric heating modules 31 are built in the outer frame member.
The outer frame member 30 has side surface members (side walls) 32a and 32b that face each other. The side members 32a and 32b of the outer frame member 30 are provided with six attachment portions 20 to which the electric heating modules 31 are attached. Two through holes 51 are provided in the attachment portions 20 of the side member 32a and 32b.
The facing side surface members 32a and 32b of the outer frame member 30 are connected by a plurality of support members 35 and maintain a predetermined relative positional relationship.

Hereinafter, one electric heating module 31 and the attachment portions 20 of the corresponding side surface members 32a and 32b will be described with reference to FIGS. 4 to 7.
The electric heating module 31 is composed of a plurality of insulators 36, two support members 35, an interval forming member 40, a tubular insulator (insulating material for maintaining an interval) 42, and an electric heating element 45.
In the heating device of the present embodiment, a set of posture maintaining tools 21 is composed of one support member 35, two spacing forming members 40, and a large number of tubular insulators (insulating materials for maintaining spacing) 42. ing. The two sets of posture maintaining tools 21 regulate the relative positions of the side members 32a and 32b and the plurality of insulators 36.

Like the prototype, the electric heating module 31 has a plurality of insulators (insulating materials) 36. In relation to drawing, in FIGS. 4 and 5, the number of insulators (insulating materials) 36 is reduced.
Each of the insulators 36 has a plate shape.

The insulator 36a arranged at the position closest to one side surface member 32a of the outer frame member 30 is provided with two terminals 37 at the center as shown in FIGS. 4 and 5.
Further, the insulator 36a is provided with through holes 38a and 38b for folding back the electric heating module.
Further, through holes 46 through which the support member 35 is inserted are provided at the two corners of the insulator 36a.

The other insulators 36b to 36i are provided with four through holes 47 through which the electric heating element 45 is inserted in the central portion.
Further, through holes 46 through which the support member 35 is inserted are provided at the other two corners of 36b to 36i.

The support member 35 is a long member having a shaft having a circular cross-sectional shape. Female threads 50 are formed on the end faces of both ends of the support member 35. The outer diameter of the support member 35 is smaller than the through hole 46 of the insulator 36, and the support member 35 penetrates the through hole 46.
On the other hand, the outer diameter of the support member 35 is larger than the through hole 51 provided in the mounting portion 20, and the support member 35 cannot pass through the through hole 51 provided in the mounting portion 20.

The space forming member 40 is a spacer interposed between the side surface member 32 and the insulators 36a and 36i at the ends. In the present embodiment, there is an interval forming member 40a interposed between one side surface member 32a and one end insulator 36a, and an interval forming member 40b interposed between the other side surface member 32b and the other end insulator 36i. ..
The spacing forming member 40 is a stainless steel cylinder. The inner diameter of the space forming member 40 is larger than the outer diameter of the support member 35. Therefore, the support member 35 can be inserted through the interval forming member 40.
Further, the outer diameter of the space forming member 40 is larger than the through hole 51 provided in the through hole 46 of the insulator 36 and the attachment portion 20 of the side members 32a and 32b. Therefore, the spacing forming member 40 cannot pass through the through hole 46 of the insulator 36 and the through hole 51 of the mounting portion 20.

The tubular insulator 42 is an insulating material interposed between the insulators 36. The tubular insulator 42 also functions as a spacer for ensuring a distance between the insulators 36.
That is, the tubular insulator 42 is located between the insulators 36 and functions as an insulating material for maintaining the interval, and is a porcelain cylinder. The inner diameter of the tubular insulator 42 is larger than the outer diameter of the support member 35. Therefore, the support member 35 can be inserted through the tubular insulator 42.
The outer diameter of the tubular insulator 42 is larger than that of the through hole 46 of the insulator 36. Therefore, the tubular insulator 42 cannot pass through the through hole 46 of the insulator 36.

The heating element 45 is a heating wire wound in a coil shape.

Next, the positional relationship between each member of the electric heating module 31 and the corresponding side surface members 32a and 32b will be described.
As described above, the outer frame member 30 has side surface members 32a and 32b facing each other, and a plurality of insulators 36a to 36i are arranged in series and in a parallel posture between the mounting portions 20 thereof.
The two through holes 51 provided in the side surface members 32a and 32b of the outer frame member 30 are located at positions corresponding to the two through holes 46 provided at the corners of each insulator 36.

In the present embodiment, the positional relationship between the side members 32a and 32b and each insulator 36 is determined by two sets of posture maintaining tools 21.
That is, the support member 35 is inserted into the through hole 46 of each of the insulators 36a to 36i, and between the one side surface member 32a and the insulator 36a at the end, there is a space forming member 40a externally attached to the support member 35, and each insulator Between 36a to 36i, there is a tubular insulator (insulating material for maintaining spacing) 42 exteriored to the support member 35, and between the insulator 36i and the other side surface member 32b, a spacing forming member exteriored to the support member 35. There are 40b.

That is, in the present embodiment, as shown in FIGS. 4 and 7, the above-mentioned axial support member 35 is inserted into each of the two through holes 46 of each insulator 36. Further, as shown in FIG. 7, the end surface of the support member 35 is in contact with the portion of the through hole 51 on the inner surface of the side surface members 32a and 32b.
Then, a screw 65 such as a bolt is engaged from the outside of the side surface members 32a and 32b with the female screw 50 formed on the end surface of the support member 35, and the support member 35 is fixed to the side surface members 32a and 32b.
In the present embodiment, the end surface of the support member 35 is in contact with the inner surfaces of the side surface members 32a and 32b. Therefore, the distance between the side surface members 32a and 32b is determined by the total length of the support member 35. Therefore, in the present embodiment, the side members 32a and 32b of the outer frame member 30 can be easily positioned.

A tubular insulator 42 is inserted through the support member 35 as shown in FIGS. 4 and 7 between the insulators 36.
A gap forming member 40a is inserted through the support member 35 between the insulator 36a arranged at one end and the side surface member 32a facing the insulator 36a. Similarly, between the insulator 36i arranged at the other end and the other side surface member 32b, the space forming member 40b is inserted through the support member 35.

Focusing on the tubular insulators 42 arranged between the insulators 36, the outer diameter of the tubular insulators 42 is larger than that of the through holes 46 of the insulators 36. Therefore, the distance between the insulators 36 is regulated by the tubular insulator 42, and the distance between the insulators 36 is not narrower than that of the tubular insulator 42.
Similarly, paying attention to the spacing forming member 40 arranged between the insulators 36a and 36i at the ends and the side surface members 32a and 32b, the outer diameter of the spacing forming member 40 is the through hole 46 and the side surface member 32a of the insulator 36. , 32b is larger than the through hole 51 provided in the mounting portion 20, so that the distance between the end insulators 36a, 36i and the side surface members 32a, 32b is regulated by the gap forming member 40, and the end insulators 36a, The distance between the 36i and the side surface members 32a and 32b is not narrower than that of the gap forming member 40.

In the present embodiment, the total length of the support member 35 is designed to be longer than the total of the thickness of each insulator 36 and the lengths of the spacing forming member 40 and the tubular insulator 42.
Therefore, when each insulator 36, the spacing forming member 40, and the tubular insulator 42 are brought into close contact with each other and brought to the center, a gap A is formed between the spacing forming member 40 and one side surface member 32a, as shown in FIG. Although not shown, a similar gap is formed between the space forming member 40 and the other side surface member 32b.
This gap A is about 1 mm to 10 mm.
In other words, the distance between the side member 32a and 32b is wider than the sum of the thickness of each insulator 36 and the lengths of the distance forming member 40 and the tubular insulator 42.
Therefore, between the side members 32a and 32b, each insulator 36 has a play in the longitudinal direction of the support member 35, and there is a slight degree of freedom in the spacing direction of the side members 32a and 32b.

In the present embodiment, the support member 35 is hung on the outer frame member 30, and the support member 35 is inserted into the through hole 46 of the insulator 36 to prevent each insulator 36 from being separated from the support member 35. There is. In the present embodiment, the spacing forming member 40 is interposed between the outer frame member 30 and the insulators 36a and 36i at the ends, and the tubular insulator 42 is interposed between the insulators 36, whereby each insulator is interposed. 36 is positioned.
However, unlike the prototype, each insulator 36 is not tightened with screws, and there is a slight degree of freedom.
That is, the length of the spacing forming member 40 is shorter than the distance between the outer frame member 30 and the insulators 36a and 36i adjacent thereto. Therefore, each insulator 36 is not in a tightened state, but in a loosely positioned state.
That is, in the region between the insulators 36, the tubular insulator 42 is attached to the support member 35, and the tubular insulator 42 is in light contact with the insulators 36 on both sides, or is close to each other with a slight interval. ing.

Both ends of the electric heating element 45 are connected to the terminals 37 of the insulator 36a, and the intermediate portion is inserted and supported through the through holes 47 of each insulator 36.
More specifically, one end of the electric heating element 45 is connected to one of the terminals 37 of the insulator 36a on the side surface member 32a side, and the portion following this is inserted into the through holes 47 provided in the vertically arranged insulators 36. It is arranged toward the other insulator 36. Then, it is folded back at a through hole 47 provided in the insulator 36 at the other end, and is inserted into the through hole 47 of each insulator 36.
Then, it is folded back again at the insulator 36. In this way, the electric heating element 45 is folded back a plurality of times, and the other end reaches the other terminal 37 and is connected.

Next, the function of the heating device 8 will be described.
The heating device 8 is energized by the electric heating element 45 to generate heat in the same manner as the known one.
Assuming that the temperature cycle test is performed by the environmental test apparatus 1, the electric heating element 45 generates heat by energizing the heating apparatus 8, and a high temperature environment can be created in the test chamber 5.
In the subsequent low temperature environment, cold air passes through the heating device 8 and is cooled.
Here, since the support member 35 inserted through each insulator 36 is a metal shaft, it shrinks more heat than the insulator 36.
However, in the present embodiment, since each insulator 36 has a degree of freedom in the spacing direction of the side surface members 32a and 32b, the support member 35 is not excessively tightened even if the support member 35 contracts.
Therefore, the force applied to each insulator 36 is small, and even if there is repeated stress, the insulator 36 will not be damaged.
Further, according to the present embodiment, it is also possible to prevent the insulators 36a and 36i at the ends from coming into contact with the side surface members 32a and 32b.

In the embodiment described above, the spacing forming member 40 is made of stainless steel, and the spacing forming member 40 is configured to be in direct contact with the insulator 36a, but some cushioning member may be interposed. For example, a washer-shaped ring as shown in FIG. 8 may be used as a cushioning material 71, and this may be interposed between the stainless steel cylinder 80 and the insulator 36a to prevent the insulator 36a from being damaged. In the present embodiment, the tubular body 80 and the cushioning material 71 function as the spacing forming member 81.

In the embodiment shown in FIG. 8, a ring 83 is also mounted between the plate-shaped insulator 36 and the tubular insulator 42 to prevent the insulators from coming into direct contact with each other. It is desirable that the ring 83 mounted between the plate-shaped insulator 36 and the tubular insulator 42 is an insulating material.

Further, as shown in FIG. 9, a plurality of washer-shaped rings 72 may be stacked and inserted into the support member 35, which may be used as the spacing forming member 73.
The interval forming member may have a groove-like cross-sectional shape and may be externally fitted so as to cover the support member 35.

In the embodiment described above, the spacing forming members 40, 73, 81 have a tubular shape or a ring shape, and by fitting the spacing forming members 40, 73, 81 to the support member 35, the spacing forming members 40, 73, 81 are fitted to the side member 32a and the insulator 36a. Although it is interposed between the two, an interval forming member may be provided at another portion.
For example, as shown in FIG. 10, a protrusion may be provided on the side surface member 32a to serve as the spacing forming member 74.
On the contrary, a protrusion may be provided on the side surface member 32a side of the insulator 36a, and this may be used as the spacing forming member.

It is desirable that the spacing forming members 40, 73, 81 are made of a material that is less likely to rust or deteriorate, and stainless steel is recommended, but the materials of the spacing forming members 40, 73, 81 are limited. is not it. For example, the spacing forming members 40, 73, 81 may be made of porcelain or resin. Further, the spacing forming members 40, 73 and 81 may be made of a metal other than stainless steel.

In the embodiment described above, the support member 35 has a circular cross-sectional shape and a shaft shape, but the cross-sectional shape of the support member 35 is arbitrary and may be quadrangular or groove-shaped. ..

In the embodiment described above, the female screw 50 is provided on the end surface of the support member 35, and the screw 65 is inserted from the outside of the outer frame member 30 to fix the support member 35. Although this configuration is recommended, the present invention is not limited to this configuration. For example, as shown in FIG. 11, a flange portion 75 is provided at the end of the support member 35, and a through hole is provided therein. , The support member 35 may be fixed by bolts and nuts 76.
Further, the insertion direction of the screw is also arbitrary, and the screw may be inserted from the inside to the outside of the outer frame member 30.

Further, the connection structure between the support member 35 and the outer frame member 30 is not limited to this embodiment, and may have the same structure as the prototype. That is, as in the prototype, the support member 35 may be inserted into the through hole of the outer frame member 30.
In short, the connection structure between the support member 35 and the outer frame member 30 is not limited as long as the relative positions of the side surface members 32a and 32b of the outer frame member 30 are determined and the insulator 36 is positioned.

In the embodiment described above, the configuration of the present invention is adopted as the heating device 8 of the normal environmental test device, but it can also be used as the heating device of the thermal shock test device 48 as shown in FIG. 12, for example.
The thermal shock test device 48 is a form of an environmental test device, and has a function of sending hot air 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 a device equipped with.

As shown in FIG. 12, the thermal shock test apparatus 48 has a test chamber 52 in which a sample body is placed, a high temperature chamber 53 capable of sending hot air to the test chamber 52, and a test chamber 52. It is equipped with a low temperature chamber 55 capable of sending cold air to the air. In the present embodiment, the high temperature chamber 53 is arranged at the upper part and the low temperature chamber 55 is arranged at the lower part with the test room 52 as a reference. Further, a vent 56 communicating with each other is provided between the test chamber 52 and the high temperature chamber 53 and between the test chamber 52 and the low temperature chamber 55. Each of the vents 56 is provided with a damper 63 that limits the flow of gas between the chambers.

The test chamber 52 is a portion where a desired environment is formed, and has a test chamber side temperature sensor 57 that detects the ambient temperature in the test chamber 52.

The high greenhouse 53 is a portion having a function of heating the gas in the room to a preset temperature on the high temperature side set in advance and circulating the heated gas between the test chambers 52, and the gas is heated as a main configuration. It has a heater 58 for heating, a high temperature side blower 60 for circulating gas, and a high temperature side temperature sensor 61 for detecting the ambient temperature in the high temperature chamber 53.
In the present embodiment, as the heating heater 58, one having the same structure as the heating device 8 described above is adopted.

The low greenhouse 55 is a portion having a function of cooling the gas in the room to a preset temperature on the low temperature side set in advance and circulating the cooled gas with the test room 52, and the gas is cooled as a main configuration. It has a cooler 62, a low-temperature side blower 67 that circulates gas, an adjustment heater 68 that finely adjusts the temperature of the cooled gas, and a low-temperature side temperature sensor 70 that detects the ambient temperature in the low-temperature chamber 55.
In the present embodiment, as the adjusting heater 68, a heater having the same structure as the heating device 8 described above is adopted.

In the thermal shock test apparatus 48, when the environment in the test chamber 52 is switched from the low temperature environment to the high temperature environment, the high temperature chamber 53 and the test chamber 52 are communicated with each other. At that time, the low temperature air in the test chamber 52 is the high temperature chamber. It flows into 53, and the ambient temperature of the heater 58 temporarily drops. However, the heater 58 has the same structure as the heating device 8 described above, and is not easily damaged.
Further, in the thermal shock test apparatus 48, when the environment in the test chamber 52 is switched from the high temperature environment to the low temperature environment, the low temperature chamber 55 and the test chamber 52 are communicated with each other. It flows into the chamber 55, and the ambient temperature of the adjusting heater 68 temporarily rises.
However, the adjusting heater 68 has the same structure as the heating device 8 described above, and is not easily damaged.

In the thermal shock test apparatus 48, the characteristic configuration of the present invention is adopted for the heating heater 58 in the high temperature chamber 53 and the adjustment heater 68 in the low temperature chamber 55, but one of the heaters is characteristic of the present invention. The configuration may be adopted. In that case, it is recommended to adopt the characteristic configuration of the present invention for the adjusting heater 68 in the low temperature chamber 55.

As an example of the thermal shock test apparatus, a test chamber 52, a high temperature chamber 53 and a low temperature chamber 55 as temperature control chambers, and a structure for switching the temperature control chamber for communicating with the test chamber 52 are shown, but other structures are shown. The heating device 8 of the present invention can also be used as the thermal shock test device.
For example, a two-tank type having a high-temperature side test chamber and a low-temperature side test chamber, or a three-tank type having a high-temperature side test chamber, a normal temperature test chamber, and a low-temperature side test chamber, and a test object moving means for moving the test object. The object to be tested may be moved between test rooms to give a thermal shock.

1 Environmental test device 8 Heating device 21 Posture maintenance tool 30 Outer frame member 31 Electric heating modules 32a, 32b Side members 35 Support members 36 Insulators (insulators)
37 Terminals 40, 73, 74, 81 Spacing forming member 42 Spacing insulating material 45 Electric heating element 46 Through hole 50 Female screw 51 Through hole 58 Heating heater 68 Adjustment heater

Claims (7)

An environmental test device that has a test room in which a test object is placed and an air conditioner that controls the temperature of the test room to create a desired environment in the test room, and is one of the air conditioners. In an environmental test device having a heating device,
The heating device has an outer frame member, a support member, an electric heating element, and a holding insulating material that holds the electric heating element and has a through hole through which the support member is inserted.
The support member is held by the outer frame member, the support member is inserted into the through hole, and a space forming member is arranged between the outer frame member and the holding insulating material adjacent thereto. The holding insulating material is positioned,
An environmental test apparatus characterized in that the length of the spacing forming member is shorter than the distance between the outer frame member and the holding insulating material adjacent thereto. An environmental test device that has a test room in which a test object is placed and an air conditioner that controls the temperature of the test room to create a desired environment in the test room, and is one of the air conditioners. In an environmental test device having a heating device,
The heating device has an outer frame member, a support member, an electric heating element, and a holding insulating material that holds the electric heating element and has a through hole through which the support member is inserted.
The support member is held by the outer frame member, the support member is inserted into the through hole, and a space forming member is arranged between the outer frame member and the holding insulating material adjacent thereto. , An insulating material for maintaining an interval is arranged between the insulating materials for holding, and the insulating material for holding is positioned.
The outer frame member has side surface members facing each other.
The overall length of the support member between the opposing side surface members is longer than the sum of the thickness of the holding insulating material, the length of the spacing forming member, and the length of the spacing maintaining insulating material. Environmental test equipment. The environmental test apparatus according to claim 1 or 2, wherein the support member has an elongated shape, and the interval forming member is fitted onto the support member. The outer frame member has side walls facing each other, and the support member is hung between the side walls. In the region between the holding insulating materials, the supporting member is provided with an insulating material for maintaining an interval. The environmental test apparatus according to any one of claims 1 to 3, wherein the space-maintaining insulating material is in contact with or in close contact with the holding insulating material on both sides. A claim characterized in that the support member has a female screw or a screw insertion hole formed at an end thereof, and the screw member is inserted from the outside of the outer frame member so that the support member is attached to the outer frame member. Item 4. The environmental test apparatus according to any one of Items 1 to 4. It has an outer frame member, a support member, an electric heating element, and a holding insulating material that holds the electric heating element and has a through hole through which the support member is inserted.
The support member is held by the outer frame member, the support member is inserted into the through hole, and a space forming member is arranged between the outer frame member and the holding insulating material adjacent thereto. The holding insulating material is positioned,
A heating device characterized in that the length of the spacing forming member is shorter than the distance between the outer frame member and the holding insulating material adjacent thereto. It has an outer frame member, a support member, an electric heating element, and a holding insulating material that holds the electric heating element and has a through hole through which the support member is inserted.
Is the supporting member is held before Kigaiwaku member, wherein the support member into the through hole is inserted, the spacing member disposed between the and the outer frame member and the holding insulating material adjacent thereto At the same time, an insulating material for maintaining an interval is arranged between the insulating materials for holding, and the insulating material for holding is positioned.
The outer frame member has side surface members facing each other.
The overall length of the support member between the opposing side surface members is longer than the sum of the thickness of the holding insulating material, the length of the spacing forming member, and the length of the spacing maintaining insulating material. Heating device.

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