Environmental testing equipment and vibration testing equipment

Abstract

By effectively utilizing the waste heat from the cooling blower, we provide environmental and vibration testing equipment that is useful as such without incurring unnecessary energy costs, and also offers benefits to the operators. [Solution] An environmental testing apparatus comprising a vibration testing device, a temperature and humidity test chamber capable of at least enclosing the test stand of the vibration testing device, and a cooling blower for cooling the vibration testing device, wherein the apparatus includes an exhaust guide path for guiding the exhaust from the cooling blower, and an air layer guide provided at the downstream end of the exhaust guide path for retaining the exhaust and forming an air layer.

Description

Technical Field

[0001] The present invention relates to an energy-saving environmental test apparatus and a vibration test apparatus that reuse waste heat generated when cooling the vibration test apparatus included in the environmental test apparatus.

Background Art

[0002] Conventionally, vibration tests have been carried out in various industrial fields including aerospace, aircraft and automobiles, in order to grasp various performances. In recent years, there has arisen a need to perform this vibration test under a specific temperature and humidity environment.

[0003] For this reason, as disclosed in Patent Document 1, a composite environmental test is performed in which the test table of a vibration test apparatus to which a test object is fixed is arranged in the temperature and humidity test chamber of a temperature and humidity environmental test apparatus, and the test object is subjected to a vibration test under a desired temperature and humidity environment.

[0004] A vibration generator 100 of a vibration test apparatus used for such a vibration test, as shown in FIG. 16 for example, is composed of a movable part 102 on which a test object T is mounted, a fixed part 114 having a magnetic path member, and a cooling blower 120 for cooling the movable part 102 and the fixed part 114.

[0005] The fixed part 114 is composed of, for example, a magnetic path member 116 made of iron or the like, and an excitation coil 118 that generates magnetic flux flowing through the magnetic path member 116. A constant magnetic flux flows through the magnetic path member 116 of the excitation coil 118 by applying a voltage from a constant voltage source (not shown).

[0006] On the other hand, the movable part 102 is composed of a test table 104 on which a test object (not shown) is mounted, a movable part suspension spring 106 that connects the movable part 102 and the fixed part 114 and holds the movable part 102 in a movable state, and a drive coil 108 inserted into the gap 110 of the magnetic path member 116.

[0007] The drive coil 108 is mounted perpendicular to the magnetic field (static magnetic field) generated by the excitation coil 118, and the movable part 102 can be vibrated by passing an alternating current through the drive coil 108. The magnitude of the vibration (excitation force) generated can be controlled by changing the magnitude of the alternating current flowing through the drive coil 108.

[0008] Reference numeral 111 denotes a restraining shaft for restraining the movable part 102 in the axial direction, and reference numeral 112 denotes a restraining bearing for restraining the movable part 102 in the axial direction.

[0009] In the vibration generator 100 configured in this way, the excitation coil 118 and the drive coil 108 are cooled by a cooling blower 120 to prevent them from overheating and being damaged. For this reason, a cooling through-hole 117 is provided at the bottom of the fixed part 114. Reference numeral 122 denotes a blower hose connecting the vibration generator 100 and the cooling blower 120.

[0010] When the excitation coil 118 and drive coil 108 are cooled by the cooling blower 120 in this manner, an airflow is created that expels air from the inside to the outside of the fixed part 114. This draws in outside air from the outside to the inside of the fixed part 114, and this outside air removes heat from the excitation coil 118 and drive coil 108. The air that has been heated by removing heat is drawn out by the cooling blower 120 and discharged from the exhaust port 121 of the cooling blower 120.

[0011] The exhaust from the cooling blower 120 is either discharged directly into the room where the test is being conducted, or discharged outside the room via an exhaust duct (not shown). [Prior art documents] [Patent Documents]

[0012] [Patent Document 1] Japanese Patent Publication No. 2019-174404 [Overview of the project] [Problems that the invention aims to solve]

[0013] Generally, the exhaust temperature of such a cooling blower 120 is about 5°C to 25°C higher than the outside air. Therefore, if it is discharged directly into the room, the temperature of the entire room will rise, creating a harsh working environment for workers, especially during the summer.

[0014] On the other hand, exhausting the heat outside the room via an exhaust duct is essentially wasting that heat.

[0015] In view of the current situation, the present invention aims to provide environmental testing equipment and vibration testing equipment that are useful as environmental testing equipment and vibration testing equipment without incurring unnecessary energy costs, by effectively utilizing the waste heat from a cooling blower, and that also have advantages for the operator. [Means for solving the problem]

[0016] The present invention was made to solve the problems of the prior art described above, and the environmental testing apparatus and vibration testing apparatus of the present invention include those configured as follows.

[0017] [1] An environmental testing apparatus comprising a vibration testing device, a temperature and humidity test chamber capable of at least enclosing the test stand of the vibration testing device, and a cooling blower for cooling the vibration testing device, An exhaust guide path for guiding the exhaust from the cooling blower, An environmental testing apparatus comprising an air layer guide provided at the downstream end of the exhaust guide passage for retaining the exhaust and forming an air layer.

[0018] [2] The environmental testing apparatus according to [1], wherein the exhaust guide passage is connected to the side wall portion such that the exhaust is supplied along the inner surface of the side wall portion of the air layer guide.

[0019] [3] The environmental test apparatus according to [1] or [2], wherein a protruding portion protrudes inward from a lower end portion of the air layer guide.

[0020] [4] The environmental test apparatus according to [3], wherein the protruding portion has a curved portion such that an inner end portion thereof faces vertically upward.

[0021] [5] The environmental test apparatus according to any one of [1] to [4], wherein the air layer guide is provided in the temperature and humidity test chamber.

[0022] [6] The temperature and humidity test chamber is provided with a humidifier, The environmental test apparatus according to any one of [1] to [5], wherein the air layer guide is provided on the humidifier.

[0023] [7] The environmental test apparatus according to any one of [1] to [6], wherein the air layer guide is provided above an operator.

[0024] [8] The environmental test apparatus according to [7], further comprising a blowing exhaust guide passage that guides exhaust air of the cooling blower to be blown vertically downward toward the air layer.

[0025] [9] The environmental test apparatus according to [7], further comprising a blower fan that generates a vertically downward airflow toward the air layer.

[0026]

[10] The temperature and humidity test chamber is provided with a humidifier, The environmental test apparatus according to any one of [7] to [9], further comprising a humidified air guide passage that guides air humidified by the humidifier to the air layer guide.

[0027]

[11] A vibration test apparatus, comprising: a cooling blower that cools the vibration test apparatus; an exhaust guide passage that guides exhaust air of the cooling blower; and an air layer guide provided at a downstream end of the exhaust guide passage, for retaining the exhaust air to form an air layer.

[0028]

[12] The vibration testing apparatus according to

[11] , wherein the air layer guide is provided above the worker.

[0029]

[13] The vibration testing apparatus according to

[12] , further comprising an exhaust guide passage for blowing air from the cooling blower in a vertically downward direction to the air layer.

[0030]

[14] The vibration testing apparatus according to

[12] , wherein the air layer guide has a blower fan that creates a vertically downward airflow relative to the air layer. [Effects of the Invention]

[0031] According to the present invention, by using the waste heat from a cooling blower that cools the vibration testing apparatus to form an air layer that is hotter than the ambient temperature, it is possible to, for example, raise the temperature of the outer surface of a temperature and humidity test chamber to prevent condensation and frost, or to use it as heating for the work environment by blowing warm air onto the workers. [Brief explanation of the drawing]

[0032] [Figure 1] Figure 1 is a schematic diagram showing the configuration of one embodiment of the environmental testing apparatus of the present invention. [Figure 2] Figure 2 is a schematic plan view showing the configuration of the air layer guide in the environmental testing apparatus shown in Figure 1. [Figure 3] Figure 3 is a schematic diagram showing a modified version of the air layer guide. [Figure 4] Figure 4 is a schematic diagram showing another modified example of the air layer guide. [Figure 5] Figure 5 is a schematic diagram showing another modified example of the air layer guide. [Figure 6] Figure 6 is a schematic diagram showing another modified example of the air layer guide. [Figure 7] Figure 7 is a schematic diagram showing another modified example of the air layer guide. [Figure 8] Figure 8 is a schematic diagram showing another modified example of the air layer guide. [Figure 9] Figure 9 is a schematic diagram showing another modified example of the air layer guide. [Figure 10] Figure 10 is a schematic diagram showing another modified example of the air gap guide. [Figure 11] Figure 11 is a schematic diagram showing the configuration of another embodiment of the environmental testing apparatus of the present invention. [Figure 12] Figure 12 is a schematic diagram showing the configuration of yet another embodiment of the environmental testing apparatus of the present invention. [Figure 13] Figure 13 is a schematic diagram showing the configuration of yet another embodiment of the environmental testing apparatus of the present invention. [Figure 14] Figure 14 is a schematic diagram showing a modified version of the environmental testing apparatus shown in Figure 13. [Figure 15] Figure 15 is a schematic diagram showing the configuration of one embodiment of the vibration testing apparatus of the present invention. [Figure 16] Figure 16 is a schematic diagram showing the configuration of a vibration generator in a conventional vibration testing apparatus. [Modes for carrying out the invention]

[0033] The embodiments (examples) of the present invention will be described in more detail below with reference to the drawings. In the embodiments described below, some details of the vibration testing apparatus and temperature and humidity testing chamber have been omitted for the sake of simplicity.

[0034] Figure 1 is a schematic diagram showing the configuration of one embodiment of the environmental testing apparatus of the present invention, and Figure 2 is a schematic plan view showing the configuration of the air layer guide in the environmental testing apparatus of Figure 1.

[0035] As shown in Figure 1, the environmental testing apparatus 10 of this embodiment includes a vibration testing apparatus 20, a temperature and humidity testing chamber 40, a cooling blower 60, and an air layer guide 70.

[0036] The vibration testing apparatus 20 includes a movable part 23 that includes a test stand 22 to which the object to be tested T is fixed, a fixed part 26 having an excitation coil (not shown) and a drive coil (not shown) for applying a desired vibration to the movable part 23, and a vibration control device (not shown) that controls the power applied to the excitation coil and the drive coil to generate a desired vibration in the movable part 23.

[0037] The vibration testing apparatus 20 of this embodiment is a vertical vibration testing apparatus that applies vertical vibration to the object under test T, and the movable part 23 is positioned vertically above the fixed part 26.

[0038] The temperature and humidity test chamber 40 has a roughly cubic shape. The temperature and humidity test chamber 40 also includes a refrigerator 46, which includes a compressor, condenser, expansion valve, and evaporator (not shown), a heater 47, which is made of, for example, an electric heating element, and a humidifier 48, which humidifies the water stored in the water tank 49 by boiling it with a heater 50. The temperature and humidity of the internal space of the temperature and humidity test chamber 40 can be maintained to a state that conforms to the desired test conditions by a temperature and humidity control device (not shown) using the refrigerator 46, heater 47, humidifier 48, and temperature sensors (not shown) and humidity sensors (not shown) that measure the temperature and humidity inside the temperature and humidity test chamber 40. Reference numeral 51 denotes a steam guide path that guides the steam generated by the humidifier 48 into the temperature and humidity test chamber 40.

[0039] The temperature and humidity test chamber 40 has an insertion hole 41 through which a connecting shaft 25 is inserted, which connects a test stand 22 located in the internal space and a movable part body 24 located outside. In this embodiment, the insertion hole 41 is provided in the bottom surface 40a of the temperature and humidity test chamber 40.

[0040] For thermal insulation, a partition 41a is provided in the gap between the test stand 22 and the bottom surface 40a, separating the inside from the outside of the temperature and humidity test chamber 40. The partition 41a is made of a flexible material so that it can deform in accordance with the vertical vibration of the movable part 23.

[0041] On the other hand, the upper surface 40b and side surfaces 40c of the temperature and humidity test chamber 40 are constructed of insulating walls, including, for example, metal plates or insulating boards, taking into consideration durability and heat insulation. The metal plates used in the insulating walls are not particularly limited, but it is preferable to use, for example, aluminum alloy or stainless steel. Furthermore, the insulating material is not particularly limited, but for example, foamed plastics such as foamed urethane or expanded polystyrene, or foamed rubber can be used.

[0042] Furthermore, a door (not shown) is provided on the side 40c of the temperature and humidity test chamber 40, and by opening this door, the test specimen T can be moved in and out of the temperature and humidity test chamber 40. This door, like the top 40b and side 40c, is made of an insulating wall.

[0043] The cooling blower 60 creates an airflow that expels air from the inside to the outside of the fixed section 26 of the vibration testing device 20. By creating such an airflow, outside air is drawn in from the outside to the inside of the fixed section 26, and this outside air removes heat from the excitation coil and drive coil, which are generating heat when power is applied. The air that has had heat removed is then discharged from the inside to the outside of the fixed section 26 by the cooling blower 60. Reference numeral 61 denotes a blower hose that connects the vibration testing device 20 to the intake section 60a of the cooling blower 60.

[0044] In this embodiment, the exhaust section 60b of the cooling blower 60 is provided with an exhaust guide passage 62 for guiding the exhaust air. An existing exhaust duct or exhaust hose can be used as the exhaust guide passage 62. The exhaust guide passage 62 is connected to the outside of the room via a damper 63 and a waste guide passage 64. By providing the damper 63 in the waste guide passage 64 in this way, the amount of exhaust air sent to the air layer guide 70 can be adjusted. Furthermore, for example, when the vibration testing device 20 is stopped and the cooling blower 60 is stopped, rainwater, dust, etc. from outside the room can enter the cooling blower 60 through the waste guide passage 64 and exhaust guide passage 62, preventing the cooling blower 60 from malfunctioning.

[0045] As described above, since the top surface 40b and side surfaces 40c of the temperature and humidity test chamber 40 are made of insulating walls, the temperature of the internal space is not transmitted to the outside surface of the temperature and humidity test chamber 40. However, since there is an insertion hole 41 in the bottom surface 40a, and the gap between the test stand 22 and the bottom surface 40a is only sealed by a flexible partition 41a, the temperature of the internal space is more easily transmitted to the outside surface of the temperature and humidity test chamber 40 in the bottom surface 40a compared to the top surface 40b and side surfaces 40c. Furthermore, the partition 41a is also affected by the temperature of the internal space.

[0046] The temperature inside the temperature and humidity test chamber 40 may fluctuate within a range of, for example, -40°C to +180°C, depending on the test conditions. In this case, if the temperature inside the temperature and humidity test chamber 40 is maintained at a lower temperature than the outside air, the bottom surface 40a and partition 41a of the temperature and humidity test chamber 40 may become cold due to the influence of the temperature inside the chamber, which may cause condensation or, in some cases, frost. Such condensation or frost may cause malfunction of the movable part 23.

[0047] Therefore, in the environmental testing apparatus 10 of this embodiment, an air layer guide 70, as shown in Figures 1 and 2, is provided at the downstream end of the exhaust guide passage 62. Specifically, the air layer guide 70 includes a first air layer guide 701 that forms an air layer in contact with the entire bottom surface 40a of the temperature and humidity test chamber 40, and a second air layer guide 702 that forms an air layer in contact with the partition portion 41a of the bottom surface 40a.

[0048] Therefore, in this embodiment, the exhaust guide passage 62 is configured to branch into a first exhaust guide passage 621 and a second exhaust guide passage 622. The first exhaust guide passage 621 is connected to the side wall portion 701a of the first air layer guide 701 so as to supply exhaust air along the inner surface of the side wall portion 701a of the first air layer guide 701, as indicated by the arrow in Figure 2. Similarly, the second exhaust guide passage 622 is connected to the side wall portion 702a of the second air layer guide 702 so as to supply exhaust air along the inner surface of the side wall portion 702a of the second air layer guide 702, as indicated by the arrow in Figure 2. When the exhaust guide passage 62 is branched in this way, it is preferable to provide dampers 631 and 632 to adjust the flow rate of exhaust air to each of the exhaust guide passages 621 and 622.

[0049] Furthermore, in this embodiment, the first exhaust guide passage 621 and the second exhaust guide passage 622 are each provided with static eliminators (ionizers) 651 and 652, respectively. Normally, the exhaust from the cooling blower 60 is heated and dry air, which can result in electrostatically charged warm air. This static electricity can have undesirable effects, such as electrostatic noise, on the acceleration sensors and various measuring instruments installed in the vibration testing device 20. Therefore, by introducing positive and negative ions into the exhaust using the static eliminators 651 and 652, the charge in the exhaust can be efficiently neutralized.

[0050] Such air layer guides 70 (701, 702) may consist only of side wall portions (701a, 702a), but for example, as shown in Figure 3(a), a protruding portion 70b can be provided that protrudes inward from the lower end of the side wall portion 70a of the air layer guide 70. Furthermore, as shown in Figure 3(b), a curved portion 70b2 can be provided such that the inner end portion 70b1 of the protruding portion 70b is vertically upward.

[0051] By configuring the air layer guide 70 in this way, the exhaust gas discharged from the cooling blower 60 is more likely to accumulate within the air layer guide 70. As shown in Figures 1-3, the lower vertical side of the air layer guide 70 is open. This allows cooled air to be released into the outside air from the lower side of the air layer guide 70. As a result, the air layer formed by air that is warmer than the outside air can maintain a constant temperature.

[0052] The material of such an air layer guide 70 is not particularly limited, but a single material such as a metal-based material, a resin-based material, or a rubber-based material such as urethane or silicone may be used, or a combination of these may be formed. Using a resin-based material or rubber-based material, which is preferable or has poor thermal conductivity, as a single material or in combination thereof, is effective as it prevents the temperature of the air layer from dropping easily.

[0053] In this way, the air layer guide 70 forms an air layer that is hotter than the outside air, which comes into contact with the entire bottom surface 40a of the temperature and humidity test chamber 40 and the partition 41a, thereby warming the outer surface of the bottom surface 40a and the partition 41a. Therefore, even if the temperature of the internal space of the temperature and humidity test chamber 40 is maintained at a lower temperature than the outside air, it is possible to prevent condensation or frost from forming on the bottom surface 40a and the partition 41a.

[0054] The configuration of the air layer guide 70 is not limited to the configurations shown in Figures 1 to 3. Figures 4 to 10 are schematic diagrams showing another modified example of the air layer guide 70. The air layer guide 70 shown in Figure 4(a) is formed such that the protruding portion 70b is inclined downward in the vertical direction. With this configuration, the air whose temperature has decreased within the air layer guide 70 has an increased specific gravity, making it easier for it to be naturally discharged downward in the direction of gravity along the inclined protruding portion 70b, thereby stabilizing the temperature distribution within the air layer.

[0055] The air layer guide 70 shown in Figure 4(b) has multiple voids 71 ​​formed in the protruding portion 70b of the air layer guide 70 with the configuration shown in Figure 3(a). With this configuration, air that has cooled down from the air trapped inside the air layer guide 70 can be naturally discharged through the voids 71, thereby stabilizing the temperature distribution within the air layer.

[0056] The air layer guide 70 shown in Figure 5(a) has multiple voids 71 ​​formed in the protruding portion 70b of the air layer guide 70 with the configuration shown in Figure 3(b). With this configuration, air that has cooled down from the air trapped inside the air layer guide 70 can be naturally discharged through the voids 71, thereby stabilizing the temperature distribution within the air layer.

[0057] The air layer guide 70 shown in Figure 5(b) has multiple voids 71 ​​formed at the inner end 70b1 of the air layer guide 70 with the configuration shown in Figure 3(b). With this configuration, air that has accumulated inside the air layer guide 70 can be discharged through the voids 71, contributing to flexible exhaust control according to the surrounding structure.

[0058] The air layer guide 70 shown in Figure 5(c) has multiple voids 71 ​​formed in the curved portion 70b2 of the air layer guide 70 with the configuration shown in Figure 3(b). Within the air layer guide 70, the area near the curved portion 70b2 is a place where air tends to stagnate. By providing voids 71 ​​in this position, the air that has cooled down can be discharged, and a localized temperature drop within the air layer can be suppressed.

[0059] The shape of the voids 71 ​​provided in the air layer guide 70 shown in Figures 4(b) and 5(a) to 5(c) is not particularly limited, but for example, it can be the shape shown in Figure 6.

[0060] Figure 6 is a schematic diagram illustrating the shape of the void 71. As shown in Figures 6(a) to (c), the shape of the void 71 may be circular, oval, or rectangular.

[0061] Furthermore, the number of voids 71 ​​is not particularly limited. When providing multiple voids 71, it is not necessary to adopt only one shape; multiple shapes of voids 71 ​​may be formed in the air layer guide 70.

[0062] In other words, the shape and number of voids 71 ​​formed in the air layer guide 70 can be appropriately selected considering the strength and processability of the air layer guide 70, the amount of exhaust from the air layer guide 70, and so on.

[0063] The air layer guide 70 shown in Figure 7 is provided with a curved portion 70b3 such that the inner end 70b1 of the protruding portion 70b is oriented vertically. With this configuration, the air whose temperature has decreased is naturally guided downward in the direction of gravity along the curved portion 70b3 and the inner end 70b1, thereby promoting air circulation within the air layer.

[0064] Figure 8 is a schematic diagram showing a configuration in which a partition plate 76 is provided inside the air layer guide 70. The air layer guide 70 shown in Figure 8(a) has a plurality of partition plates 76 between the first air layer guide 701 and the second air layer guide 702. As shown in Figure 8(b), the partition plates 76 are formed to protrude downward in the direction of gravity from the upper surface of the air layer guide 70 (in this embodiment, the bottom surface 40a of the temperature and humidity test chamber 40). It is preferable that the length of the partition plates 76 in the direction of gravity be shorter than the length of the air layer guide 70 in the direction of gravity.

[0065] Furthermore, as shown in Figure 8(c), the partition plate 76 may also have an opening 76a between it and the upper surface of the air layer guide 70. This configuration allows relatively hot air to flow more easily at the top within the air layer, making it easier to control the temperature distribution within the air layer.

[0066] The opening 76a between the upper surface of the air layer guide 70 and the air layer guide 70 may be of a constant size, but in order to control the airflow, the outlet of the first exhaust guide passage 621 may be on the upstream side and the direction of exhaust flow may be on the downstream side, so that the opening 76a is wider on the upstream side and narrows as it goes downstream. By configuring it in this way, the heat of the exhaust is more likely to accumulate overall.

[0067] When adjusting the size of the opening 76a, for example, as shown in Figure 9(a), the partition plate 76 can be supported so as to be rotatable around its center in the direction of gravity. By configuring it in this way, the size of the opening 76a can be adjusted by changing the inclination angle of the partition plate 76.

[0068] Alternatively, as shown in Figure 9(b), the partition plate 76 may be supported so as to be slidable in the direction of gravity. With this configuration, the size of the opening 76a can also be adjusted by sliding the partition plate 76 in the direction of gravity.

[0069] Furthermore, the partition plate 76 can also be provided inside the second air layer guide 702, as shown in Figure 10. In this case, it is preferable to provide a cylindrical third air layer guide 703 inside the second air layer guide 702 and to provide the partition plate 76 between the second air layer guide 702 and the third air layer guide 703.

[0070] As shown in Figure 10, the spacing between the partition plates 76 may vary. Specifically, the outlet of the second exhaust guide passage 622 can be set to the upstream side, the direction of exhaust flow to the downstream side, and the spacing between the partition plates 76 can be made narrower as one moves downstream. This configuration makes it easier for the heat of the exhaust to accumulate overall.

[0071] Figure 11 is a schematic diagram showing the configuration of another embodiment of the environmental testing apparatus of the present invention. The environmental testing apparatus 10 in this embodiment has basically the same configuration as the environmental testing apparatus 10 shown in Figures 1 to 10. Therefore, the same reference numerals are used for similar components, and their detailed descriptions are omitted. In addition, in Figure 11, components that are not directly related to the description of this embodiment are omitted to prevent the drawing from becoming cluttered.

[0072] While the vibration testing apparatus 20 in the environmental testing apparatus 10 shown in Figures 1 to 10 was a vertical vibration testing apparatus, the vibration testing apparatus 20 in the environmental testing apparatus 10 in this embodiment is a horizontal vibration testing apparatus that applies horizontal vibration to the object under test T. In such a vibration testing apparatus 20, the movable part 23 is positioned horizontally to the side of the fixed part 26.

[0073] Furthermore, the insertion hole 41 through which the connecting shaft 25 is inserted is provided in the side portion 40c of the temperature and humidity test chamber 40. A heat insulating sealant 41b is provided in the gap between the side portion 40c and the connecting shaft 25, separating the inside from the outside of the temperature and humidity test chamber 40. In this embodiment, the heat insulating sealant 41b is fixed to the temperature and humidity test chamber 40 side, but it may also be fixed to the connecting shaft 25 side.

[0074] However, because the thermal insulation sealant 41b has lower thermal insulation performance compared to thermal insulation walls, if the temperature inside the temperature and humidity test chamber 40 is maintained at a lower temperature than the outside air, the temperature inside the chamber may cause the area around the insertion hole 41 on the side surface c of the temperature and humidity test chamber 40 to become cold, which may lead to condensation or, in some cases, frost formation.

[0075] Furthermore, in this embodiment, the temperature and humidity test chamber 40 is composed of a test chamber base 40A and a test chamber body 40B. By configuring the temperature and humidity test chamber 40 to be separable vertically in this way, for example, by providing a movable mechanism (not shown) in the test chamber body 40B, vibration tests can be performed with the test chamber body 40B removed when testing under a specific temperature and humidity environment is not required.

[0076] In a temperature and humidity test chamber 40 with this configuration, a packing 42 is provided at the upper end 40A1 of the test chamber base 40A on which the test chamber body 40B is placed, in order to ensure airtightness. Since such a packing 42 has lower thermal insulation performance compared to an insulating wall, for example, if a long-term vibration test is conducted with the internal temperature of the temperature and humidity test chamber 40 below 0°C, the packing 42 itself, or the area around the packing 42, may become colder than the outside air, potentially causing condensation or frost.

[0077] Therefore, in this embodiment, an air layer guide 70 is provided on the side surface 40c of the temperature and humidity test chamber 40 so that an air layer is formed around the insertion hole 41 and the packing 42.

[0078] By providing this air layer guide, the areas around the insertion holes 41 and packing 42 are heated by the air layer, which is hotter than the outside air. This prevents condensation and frost from forming around the insertion holes 41 and packing 42 on the side surface 40c of the temperature and humidity test chamber 40, even when the temperature inside the temperature and humidity test chamber 40 is maintained at a lower temperature than the outside air.

[0079] Figure 12 is a schematic diagram showing the configuration of yet another embodiment of the environmental testing apparatus of the present invention. The environmental testing apparatus 10 in this embodiment has basically the same configuration as the environmental testing apparatus 10 shown in Figures 1 to 11. Therefore, the same reference numerals are used for similar components, and their detailed descriptions are omitted. In addition, in Figure 12, components that are not directly related to the description of this embodiment are omitted to prevent the drawing from becoming cluttered.

[0080] In the environmental testing apparatus 10 of this embodiment, an air layer guide 70 is provided in the water tank 49 of the humidifier 48 in the temperature and humidity test chamber 40. By providing the air layer guide 70 in this way, the temperature of the water in the tank 49 can be raised by the air layer, which is hotter than the outside air. Therefore, the energy required to evaporate the water in the tank 49 by the heater 50 can be reduced.

[0081] Figure 13 is a schematic diagram showing the configuration of yet another embodiment of the environmental testing apparatus of the present invention. The environmental testing apparatus 10 in this embodiment has basically the same configuration as the environmental testing apparatus 10 shown in Figures 1 to 12. Therefore, the same reference numerals are used for similar components, and their detailed descriptions are omitted. In addition, in Figure 13, components that are not directly related to the description of this embodiment are omitted to prevent the drawing from becoming cluttered.

[0082] In the environmental testing apparatus 10 of this embodiment, as shown in Figure 13, an air layer guide 70 is provided above the worker M. Furthermore, the exhaust guide passage 62 is configured to branch into a third exhaust guide passage 623 and a fourth exhaust guide passage 624. Dampers 633 and 634 are provided in each of the exhaust guide passages 623 and 624 to adjust the flow rate of the exhaust gases.

[0083] The third exhaust guide passage 623 is connected to the side wall portion 70a of the air layer guide 70, and exhaust air is supplied along the inner surface of the side wall portion 70a of the air layer guide 70, forming an air layer that is hotter than the outside air.

[0084] On the other hand, the fourth exhaust guide passage 624 is an exhaust guide passage for blowing air, and is connected to the upper surface 70c of the air layer guide 70 so that the exhaust air is blown vertically downward into the air layer. With this configuration, the exhaust air guided by the third exhaust guide passage 623 forms an air layer that is hotter than the outside air, and the exhaust air guided by the fourth exhaust guide passage 624 (exhaust guide passage for blowing air) pushes the air that is hotter than the outside air downward from the air layer. As a result, this provides a heating effect to workers located below the air layer guide 70.

[0085] For example, even in winter when outside temperatures drop and the working environment can become harsh for workers, the system can provide heating to the workers, preventing a decrease in work efficiency. Furthermore, since it eliminates the need to heat the entire room where vibration tests are conducted, it contributes to reducing energy costs.

[0086] Furthermore, in this embodiment, a humidified air guide passage 74 is provided to guide the air humidified by the humidifier 48 of the temperature and humidity test chamber 40 to the air layer guide 70, and is connected to the third exhaust guide passage 623. With this configuration, the air layer can be humidified. For this reason, even in cases where the outside air is dry, such as in winter, the humidified air can be used to provide a heating effect, thereby improving the working environment.

[0087] Furthermore, in this embodiment, an ionizer 65 is provided in the exhaust guide passage 62. This configuration prevents the blowing of electrostatically charged hot air onto workers, which could cause them to become electrically charged.

[0088] If an operator becomes electrically charged, operating the vibration testing device 20 or various measuring instruments may cause malfunctions or measurement errors. However, as in this embodiment, by electrically neutralizing the exhaust, the safety and reliability of the work environment can be improved.

[0089] In this embodiment, an exhaust guide passage for ventilation is provided to create a vertically downward airflow in the air layer. However, the invention is not limited to this, and for example, as shown in Figure 14, a blower fan 72 can also be provided in the air layer guide 70. By creating a vertically downward airflow in the air layer using the blower fan 72, a heating effect can be provided to the worker M located below the air layer guide 70.

[0090] Figure 15 is a schematic diagram showing the configuration of one embodiment of the vibration testing apparatus of the present invention. The vibration testing apparatus 20 in this embodiment has basically the same configuration as the vibration testing apparatus 20 provided in the environmental testing apparatus 10 shown in Figures 1 to 14. Therefore, the same reference numerals are used for similar components, and their detailed descriptions are omitted. In addition, in Figure 15, components that are not directly related to the description of this embodiment are omitted to prevent the drawing from becoming cluttered.

[0091] As shown in Figure 15, in this embodiment, the vibration testing apparatus 20 has the test stand 22 directly fixed to the movable body 24. Even in the vibration testing apparatus 20 configured in this way, by providing the air layer guide 70 above the worker M, a heating effect can be provided to the worker M.

[0092] Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto. For example, it is possible to combine an environmental testing apparatus equipped with a vertical vibration testing apparatus as shown in Figures 1 to 10 and an environmental testing apparatus equipped with a horizontal vibration testing apparatus as shown in Figure 11 to create an environmental testing apparatus equipped with a vibration testing apparatus capable of applying both vertical and horizontal vibrations to the object under test T. In short, various modifications are possible without departing from the object of the present invention, such as combining the configurations described in the embodiments described above. [Explanation of Symbols]

[0093] 10. Environmental testing equipment 20. Vibration testing equipment 22 Test benches 23 Moving parts 24 Movable body 25 Connecting shaft 26 Fixed part 40 Temperature and Humidity Test Chamber 40a Bottom part 40A Test chamber base 40A1 Upper end 40b Top part 40B Test Tank Body 40c side part 41 Through hole 41a Partition 41b Insulation sealant 42 Packing 46 Refrigeration unit 48 Humidifier 49 Aquariums 50 Heater 51 Steam Guideway 60 Cooling blower 60a Intake 60b Exhaust section 61 Blower hose 62 Exhaust guide path 621 First exhaust guide path 622 Second exhaust guideway 623 Third exhaust guideway 624 Fourth exhaust guideway 63 Damper 631 Damper 632 Damper 633 Damper 634 Damper 64 Guideway for waste disposal 65 Static eliminator (ionizer) 651 Static eliminator (ionizer) 652 Static eliminator (ionizer) 70 Air Layer Guide 701 First Air Layer Guide 701a Side wall part 702 Second Air Layer Guide 702a Side wall part 70a Side wall part 70b Protrusion 70b1 Inner edge 70b2 Curved section 70b3 Curved section 70c Top part 71 Holes 72 Blower fan 74 Humidifying air guide channel 76 Partition Plates 76a opening 100 Vibration Generator 102 Moving parts 104 Test bench 106 Springs for suspending movable parts 108 Drive Coil 110 void 111 Restraint shaft 112 Constrained bearing 114 Fixed part 116 Magnetic path member 117 Through hole 118 Excitation coil 120 Cooling Blower 121 Exhaust section 122 Blower hose

Claims

1. An environmental testing apparatus comprising a vibration testing device, a temperature and humidity test chamber capable of at least enclosing the test stand of the vibration testing device, and a cooling blower for cooling the vibration testing device, An exhaust guide path for guiding the exhaust from the cooling blower, An environmental testing apparatus comprising an air layer guide provided at the downstream end of the exhaust guide passage for retaining the exhaust and forming an air layer.

2. The environmental testing apparatus according to claim 1, wherein the exhaust guide path is connected to the side wall portion such that the exhaust is supplied along the inner surface of the side wall portion of the air layer guide.

3. The environmental testing apparatus according to claim 1, having a projection inward from the lower end of the air layer guide.

4. The environmental testing apparatus according to claim 3, wherein the protruding portion has a curved portion such that its inner end is vertically upward.

5. The environmental testing apparatus according to claim 1, wherein the air layer guide is provided in the temperature and humidity test chamber.

6. The temperature and humidity test chamber is equipped with a humidifier, The environmental testing apparatus according to claim 1, wherein the air layer guide is provided in the humidifier.

7. The environmental testing apparatus according to claim 1, wherein the air layer guide is provided above the worker.

8. The environmental testing apparatus according to claim 7, further comprising an exhaust guide passage for a blower that guides the exhaust air from the cooling blower to be blown vertically downward into the air layer.

9. The environmental testing apparatus according to claim 7, wherein the air layer guide has a blower fan that creates a vertically downward airflow relative to the air layer.

10. The temperature and humidity test chamber is equipped with a humidifier, The environmental testing apparatus according to claim 7, further comprising a humidified air guide path for guiding the air humidified by the humidifier to the air layer guide.

11. A vibration testing device, A cooling blower for cooling the vibration testing apparatus, An exhaust guide path for guiding the exhaust from the cooling blower, A vibration testing apparatus comprising: an air layer guide provided at the downstream end of the exhaust guide passage for retaining the exhaust and forming an air layer.

12. The vibration testing apparatus according to claim 11, wherein the air layer guide is provided above the worker.

13. The vibration testing apparatus according to claim 12, further comprising an exhaust guide passage for a blower that guides the exhaust air from the cooling blower to be blown vertically downward into the air layer.

14. The vibration testing apparatus according to claim 12, wherein the air layer guide has a blower fan that creates a vertically downward airflow relative to the air layer.

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