JP7370918B2 - environmental test equipment - Google Patents

Description

The present invention relates to an environmental test device that creates a desired environment inside a test chamber.

The environmental test device has a test chamber and can artificially create a predetermined environment such as a temperature environment (e.g. high temperature or low temperature) or a humidity environment (e.g. high humidity or low humidity) in the test chamber. It is something.

Some environmental test equipment has an air conditioning section and a test chamber. Here, the air conditioning section is a part in which air conditioning equipment such as a heater and a cooler is built in, and the test chamber is a space in which a specimen (under test object) is placed.
Some environmental test apparatuses include a blower that circulates air between the air conditioning section and the test chamber to adjust the environment within the test chamber to a desired environment.

JP2014-66593A

When performing an environmental test, there are cases where it is desired to bring the temperature of the specimen to the test temperature within a short time by blowing air directly onto the specimen.
On the other hand, if the specimen is large, for example, if air is blown directly onto the specimen, temperature variations may occur on the surface of the specimen. In preparation for such a situation, it may be desirable to surround the specimen with air adjusted to a predetermined temperature or the like.
Further, as a general performance required for an environmental test device, it is required that temperature variations within the test chamber be small.

When it is desired to blow air directly onto the specimen, it may be desirable to have the blower blow the air in a straight direction toward the center of the test chamber.
On the other hand, if you want to surround the specimen with air adjusted to a predetermined temperature, or if you want to reduce temperature variations in the room where the items are placed, you can reduce the amount of air blown into the test room from the blower. Sometimes it's better to spread it out.
The purpose of the present invention is to provide an environmental testing device that can meet the above-mentioned requirements. The objective is to develop an environmental testing device that can be changed.

A mode for solving the above problems is an environment that includes a test chamber in which a specimen is installed, an air conditioning means, and a blower, and in which air conditioned by the air conditioning means is blown into the test chamber by the blower. The blower has a blade that rotates around a rotation axis, and the blade has a propeller-shaped part and a protrusion part that projects from the propeller-shaped part in the axial direction of the rotation axis, The protruding portion has a surface that contacts air and blows air in the circumferential direction of the rotating shaft when the blade rotates, and has a cylindrical body that covers the periphery of the blade, and the cylindrical body has a surface that blows air in the circumferential direction of the rotary shaft when the blade rotates. This is an environmental testing device characterized by being movable.

The blower employed in the environmental test device of this embodiment is equipped with characteristic blades. The blade employed in the environmental testing device of this embodiment has a propeller-shaped portion and a protruding portion that protrudes from the propeller-shaped portion in the axial direction of the rotating shaft of the blower.
The blades of the blower are rotated by a motor or the like similarly to known blades. The propeller-shaped portion of the blade moves air mainly in the axial direction of the rotating shaft by rotating. On the other hand, the protrusions of the blades mainly move air in the circumferential direction by rotating.
The environmental test device of this embodiment has a cylindrical body that covers the periphery of the blade. The cylindrical body is movable back and forth in the axial direction of the rotating shaft.
Therefore, the cylindrical body can be moved to, for example, completely cover the blade or to expose a part of the blade from the cylindrical body.
If the cylindrical body is placed in a position that completely covers the periphery of the blade, the air generated by the protrusion will be blocked by the cylindrical body and will not be able to diffuse, and will flow against the wall of the cylindrical body. It flows along the cylinder and is blown out from the tip of the cylinder. Note that the air generated by the propeller-shaped portion travels linearly and is blown out from the tip of the cylindrical body.
Therefore, if the cylindrical body is located at a position that completely covers the periphery of the blade, air is blown out from the blower in a straight direction toward the test chamber.
On the other hand, if the cylindrical body is located at a position where a part of the blade is exposed, the air generated by the protrusion is blown out in the circumferential direction from the part where the cylindrical body is not present.
Therefore, in the environmental testing device of this aspect, by changing the position of the cylindrical body, it is possible to adjust the ratio of the amount of air blown in the straight direction toward the test chamber and the amount of air blown in the diffusion direction.

In the aspect described above, it is preferable that the blower is installed so as to be located in the center of the wall surface of the test chamber.

"Central" is a concept that includes not only the "center" but also its surroundings. Specifically, it refers to a situation where there is a gap between the blower outlet and the ceiling, bottom, and side walls of the test chamber.
According to this aspect, since there are spaces above and below the blower and on the left and right sides, it is easy to diffuse the wind blown out from the blower.

In each of the above aspects, the propeller-shaped portion has a plurality of wind surfaces, and the protruding portion is located on the rear side with respect to the rotational direction of the wind surface, and near the outer edge of the wind surface. It is desirable that there be.

According to this aspect, since the position of the protrusion is on the rear side with respect to the rotational direction of the wind plane, the direction of the air blown on the wind plane can be changed in the circumferential direction by the protrusion.
Moreover, since the position of the protrusion is near the outer edge of the wind plane, the circumferential speed is high and it is possible to generate wind that diffuses efficiently.

In each of the above-described aspects, it is desirable that the protrusion has a pressure-receiving surface that comes into contact with air and changes the blowing direction during rotation.

According to this aspect, it is possible to generate wind that diffuses efficiently.

In each of the above-described aspects, it is desirable to have an operating means for moving the cylindrical body.

According to this aspect, the position of the cylindrical body can be changed by operating the operating means from the outside, and the ratio of the amount of air blown in the straight direction toward the test chamber and the amount of air in the diffusion direction can be changed. can.

According to the environmental test device of the present invention, the ratio of the amount of air blown in the straight direction toward the test chamber and the amount of air blown in the diffusion direction can be changed.

FIG. 1 is a sectional view of an environmental test device according to an embodiment of the present invention. 2 is a sectional view taken along line AA in FIG. 1. FIG. (a) is a perspective view of the blower employed in the environmental test device of FIG. 1, and (b) is a front view of a blade piece. 2 is a cross-sectional view conceptually showing the vicinity of the blower of the environmental test equipment in FIG. 1, in which (a) the cylindrical body is moved toward the test chamber to increase the amount of air blown in the straight direction toward the test chamber; (b) shows the case where the cylindrical body is pulled down to increase the proportion of the air volume in the diffusion direction. (a) thru|or (d) are a front view and a side view of the modification of a blade|wing piece.

The environmental test device 1 according to the embodiment of the present invention will be described below.
As shown in FIG. 1, the environmental test device 1 of this embodiment has a casing 3 formed of a heat insulating wall 2. As shown in FIG. There is an opening 5 on the front surface of the housing 3, and a door 6 is provided in the opening 5. Inside the housing 3 there is a space that functions as a test chamber 8.

In this embodiment, the housing 3 and the door 6 form a heat insulating tank. There is a partition wall (partition) 11 inside the heat insulating tank, and the partition wall 11 largely divides the inside of the heat insulating tank into a test chamber 8 and an air conditioning section 15.
The partition wall 11 is provided with intake openings 16 and 17 at its upper and lower ends, that is, near the upper and lower sides of the partition wall 11 .
Further, in the center of the partition wall 11, there is a ventilation opening 20.

The environmental test apparatus 1 has an air conditioning device (air conditioning means) 22.
The air conditioner 22 includes a humidifier 23, a cooling device, and a heater 26.
The cooling device includes coolers 25a and 25b which are evaporators. The cooling device of this embodiment has a configuration in which the downstream side of a condenser (not shown) is branched, and two coolers 25a and 25b are connected in parallel and refrigerant is supplied to each of them.
The heater 26 is an electric heater and is formed in a substantially annular shape. The humidifying device 23 includes a humidifying tray 27 that stores water and a humidifying heater 28.
In this embodiment, a humidifying tray 27, a humidifying heater 28, coolers 25a and 25b, and a heating heater 26 are built into the air conditioning unit 15.

In this embodiment, the blower 30 is arranged at a position corresponding to the center of the partition wall 11.
The blower 30 will be explained below. In the following description, the test chamber 8 side will be referred to as the front, and the air conditioning unit 15 side will be referred to as the rear. Based on the air blowing direction, the suction side is at the rear, and the blowing side is at the front.
As shown in FIGS. 3 and 4, the blower 30 includes blades 31, a motor 32, and a cylindrical body 33.

As shown in FIG. 3, the blade 31 has a propeller-shaped portion 35, and a protrusion 36 is provided in a part of the propeller-shaped portion 35.
The propeller-shaped portion 35 has a structure similar to the blades of a known axial blower, and includes a plurality of twisted blade pieces 38 arranged radially around the rotating shaft 40 . In this embodiment, the surface of each blade piece 38 on the test chamber 8 side serves as the wind plane 43 . Although the blower 30 of this embodiment has four blade pieces 38, the number of blade pieces 38 is arbitrary.
When the propeller-shaped portion 35 is rotated by the motor 32, the wind plane 43 sends out air in the forward direction, generating wind mainly in the forward direction.
In this embodiment, the blade 31 rotates clockwise as shown by arrow A in FIG. 3, and blows air forward as shown by arrow B.

The protrusion 36 is a plate having a certain area. Although the shape of the protrusion 36 is not limited, it is a quadrilateral in this embodiment. The protrusion 36 is a small vertical blade. The protrusion 36 can be compared to a part of the blade of a centrifugal blower.
The protruding direction of the protruding portion 36 is the axial direction of the rotating shaft 40, and is forward from the propeller-shaped portion 35. The protruding portion 36 is a small wall that stands up substantially perpendicularly to the wind plane 43 of the propeller-shaped portion 35 . That is, the wind plane 43 of the propeller-shaped portion 35 is a plane that crosses the direction of the rotation axis of the blower 30, whereas the protrusion 36 has a plane that extends along the direction of the rotation axis.

The position of the protruding portion 36 relative to the propeller-shaped portion 35 is at the periphery of the wind face 43 of the propeller-shaped portion 35 and is away from the rotating shaft 40, as shown in FIG. 3(b).
The position of the protrusion 36 is near the outer edge.
Further, the position of the protruding portion 36 is behind the wind plane 43 of each blade piece 38 with respect to the rotation direction A of the propeller-shaped portion 35. That is, the protruding portion 36 is located on the periphery of the blade piece 38 and at a portion corresponding to the side of the contour line of the blade.
When the blades 31 rotate, the protruding portion 36 can urge air in the centrifugal direction and blow the air in the circumferential direction. The surface on the front side of the protrusion 36 with respect to the rotation direction A is a pressure receiving surface 47 that comes into contact with air during rotation and changes the direction of air blowing. That is, the pressure receiving surface 47 of the protrusion 36 comes into contact with air during rotation and changes the direction of air blowing.

In this embodiment, all the blade pieces 38 are provided with one protrusion 36, but there may be some blade pieces 38 that do not have the protrusion 36.
Further, one blade piece 38 may be provided with a plurality of protrusions 36. The protrusions 36 may be arranged radially around the rotating shaft 40, for example like blades of a plate fan. Further, the protrusion 36 may be curved.

The cylindrical body 33 is a cylinder that is penetrated at the front and back, and the periphery of the penetrated portion is covered. That is, the cylindrical body 33 has a peripheral wall 48 , and has an outlet side opening 55 and a suction side opening 56 .
The cylinder body 33 is provided with an operating rod 45 . For convenience of illustration, the operating rod 45 is omitted in FIG.
The cylindrical body 33 covers the outer periphery of the blade 31, as shown in FIGS. 3 and 4. That is, the blade 31 is partially or entirely housed within the cavity of the cylindrical body 33.
Further, as shown in FIG. 4, a guide member 46 is provided on the outside of the cylinder 33 in the circumferential direction, and can guide the movement of the cylinder 33 in the front-rear direction.

When the blades 31 of the blower 30 are rotated by the motor 32, air is mainly sent out in the forward direction by the propeller-shaped portion 35, as described above.
On the other hand, when the blade 31 is rotated by the motor 32, the protrusion 36 urges air in the centrifugal direction (diffusion direction).

As described above, the blower 30 employed in this embodiment has the cylindrical body 33 that covers the blades 31.
Therefore, the air blown by the propeller-shaped part 35 and the protrusion 36 is guided by the cylinder 33, and the direction of the air is changed by changing the position of the cylinder 33 as described later.
When the peripheral wall 48 of the cylindrical body 33 is positioned to cover most of the blade 31 as shown in FIG. The air collides with the inner wall, preventing the air from spreading in the circumferential direction. Therefore, the air generated by the protrusion 36 flows along the inner wall of the cylindrical body 33 and is blown out from the blow-off side opening 55 of the cylindrical body 33.
That is, when the peripheral wall 48 of the cylindrical body 33 is positioned to cover most of the blade 31 as shown in FIG. 4(a), the air is blown out linearly.

On the other hand, if the cylindrical body 33 is located at a position where the periphery of the protrusion 36 of the blade 31 is exposed from the peripheral wall 48 of the cylindrical body 33, as shown in FIG. The air is blown out in the circumferential direction from the portion where the peripheral wall 48 is not provided.

Next, the positional relationship of each member constituting the environmental test apparatus 1 will be explained.
In this embodiment, the blower 30 is attached to the heat insulating tank so as to be located in the center of the partition wall 11 described above.
In this embodiment, the blower 30 is installed at the center of the partition wall (partition) 11, but even if the position of the blower 30 is slightly shifted from the center, there is no major effect.

The two coolers 25a and 25b are located above and below the blower 30, as shown in FIGS. 1 and 2.
The heater 26 is provided at a position surrounding the intake side of the blower 30.
The humidifying tray 27 is installed below the air conditioning unit 15.
Further, a temperature sensor 52 and a humidity sensor 53 are provided in the test chamber 8 and near the ventilation opening 20. The positions of the temperature sensor 52 and the humidity sensor 53 are arbitrary and are not limited to the vicinity of the ventilation opening 20.

The blower 30 is installed in the middle of the partition wall 11, as shown in FIGS. 1, 2, and 4.
That is, the blades 31 of the blower 30 are located at positions corresponding to the ventilation openings 20 provided in the partition wall 11, and the cylindrical body 33 covers the periphery of the blades 31 at this position.
The motor 32 is located outside the housing 3, and the motor 32 and the blades 31 are connected by a shaft 57.
The operating rod 45 penetrates the air conditioning section 15 and protrudes outside the housing 3.
Therefore, by moving the operating rod 45 from the outside in the longitudinal direction along the axial direction of the rotary shaft 40, manually or by power, the cylinder 33 is moved in the longitudinal direction within the housing 3, and the cylinder 33 and the blades are moved in the longitudinal direction. The relative positional relationship with 31 changes. Therefore, in the environmental test apparatus 1 of the present embodiment, the cylinder 33 can be moved from the outside in the front-rear direction along the axial direction of the rotating shaft 40 not only when the door 6 is open but also when the door 6 is closed. , the air flow within the test chamber 8 can be changed.

Next, the functions of the environmental test device 1 of this embodiment will be explained.
In the environmental test apparatus 1 of this embodiment, when the blower 30 is started, air circulates between the air conditioning unit 15 and the test chamber 8, and the temperature and humidity in the test chamber 8 are adjusted to a desired environment.
When the blower 30 is started, air in the test chamber 8 is introduced into the air conditioning section 15 through the upper and lower intake openings 16 and 17. As a result, the air conditioning unit 15 enters a ventilation state, and the air comes into contact with the air conditioning equipment 22 to perform heat exchange and humidity adjustment, and is sucked into the blower 30.
The blower 30 blows air into the test chamber 8 after adjusting the temperature and humidity. That is, air is blown out from the center of the partition wall 11 toward the test chamber 8.

When using the environmental test device 1, the blower 30 is operated and the air conditioner 22 is controlled so that the detected values of the temperature sensor 52 and humidity sensor 53 approach the temperature and humidity of the set environment.

For example, if you want to apply air directly to the specimen from the blower 30, operate the operating rod 45 to move the cylinder 33 forward as shown in FIG. cover most of the area. As a result, among the wind generated by the blades 31, the air having a vector directed outward collides with the inner wall of the cylindrical body 33, is prevented from spreading in the circumferential direction, changes direction, and travels along the inner wall of the cylindrical body 33. The air flows and is blown out into the test chamber 8 from the blow-out side opening 55 at the tip of the cylinder 33 .
Among the winds generated by the blades 31, the blowing air having a vector that moves straight forward flows in the forward direction and is blown out into the test chamber 8 from the blowout side opening 55 of the cylinder body 33.
Therefore, all the air generated by the blades 31 is blown into the test chamber 8 from the blow-off side opening 55 of the cylinder 33, and is directly applied to the specimen, for example.

On the other hand, if it is desired to surround the specimen with air whose temperature and the like are controlled, the cylinder 33 is moved back to expose a part of the blade 31 from the cylinder 33, as shown in FIG. 4(b).
As a result, among the wind generated by the blades 31, the air having an outward vector is blown out from the portion where the cylinder 33 is not present, and flows along the partition wall 11, for example.

In the embodiment described above, the intake openings 16 and 17 are provided near the upper and lower sides of the partition wall 11, and the two coolers 25a and 25b are installed between the intake openings 16 and 17 and the blower 30. However, intake openings may be provided near the left and right sides of the partition wall 11, and the two coolers 25a and 25b may be arranged between each intake opening and the blower 30.
Furthermore, intake openings may be provided near the upper and lower sides of the partition wall 11 and near the left and right sides, respectively, and the cooler may be arranged in an annular manner around the intake side of the blower 30.

The shape of the intake opening is arbitrary and may be composed of a large number of small holes. Further, a filter or the like may be attached.

In the embodiment described above, the heater 26 is installed in a position surrounding the blower 30, but similarly to the cooler 25, it may be divided into a plurality of parts and placed between the intake openings 16, 17, etc. and the blower 30. good.

Although it is recommended that the blower 30 be located at a position where it can blow air toward the center of the test chamber 8, the position of the blower 30 is not limited and may be at any other position.

In the embodiment described above, only one blower 30 is installed on the partition wall 11, but a plurality of blowers 30 may be installed.

Although it is desirable that the protruding portion 36 of the blower 30 is provided at the position of the above-described embodiment, it is not denied that the protruding portion 36 of the blower 30 may be provided at another location.
For example, as shown in FIG. 5(a), it is not denied that the protrusion 36 is provided on the wind face 43 of the propeller-shaped portion 35. This does not deny that the protrusion 36 is provided at the tip of the propeller-shaped portion 35 as shown in FIG. 5(b). This does not deny that the protrusion 36 is provided on the front side of the wind plane 43 in the rotational direction as shown in FIG. 5(c).
In the embodiment described above, the protruding portion 36 protrudes forward from the propeller-shaped portion 35 in the axial direction of the rotating shaft 40 . Although this configuration is recommended, the protruding portion 36 should protrude toward the rear side of the propeller-shaped portion 35 in the axial direction of the rotating shaft 40, as shown in FIG. 5(d). There may be.

1 Environmental test equipment 6 Door 8 Test chamber 15 Air conditioning section 22 Air conditioning equipment (air conditioning means)
30 Air blower 31 Blade 33 Cylindrical body 35 Propeller shape portion 36 Projection portion 38 Blade piece 40 Rotating shaft 43 Wind surface 45 Operation rod (operation means)
47 Pressure receiving surface

Claims (5)

An environmental test device comprising a test chamber in which a specimen is installed, an air conditioning means, and a blower, and in which air conditioned by the air conditioning means is blown into the test chamber by the blower,
The blower has blades that rotate around a rotation axis,
The blade has a propeller-shaped portion and a protruding portion that protrudes from the propeller-shaped portion in the axial direction of the rotating shaft,
The protruding portion has a surface that comes into contact with air and blows air in a circumferential direction of the rotating shaft when the blade rotates,
An environmental testing device characterized in that it has a cylindrical body that covers the circumference of the blade, and the cylindrical body is movable in the axial direction. The environmental test apparatus according to claim 1, wherein the blower is installed so as to be located in the center of a wall surface of the test chamber. The propeller-shaped portion has a plurality of wind surfaces, and the protruding portion is located on the rear side with respect to the rotational direction of the wind surface and near the outer edge of the wind surface. The environmental test device according to claim 1 or 2. The environmental testing device according to any one of claims 1 to 3, wherein the protruding portion has a pressure-receiving surface that comes into contact with air and changes the blowing direction during rotation. The environmental testing apparatus according to any one of claims 1 to 4, further comprising an operating means for moving the cylinder.

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