JP4815466B2 - Environmental test equipment - Google Patents

Description

  The present invention relates to an environmental test apparatus, and more particularly to an apparatus capable of performing a test by introducing a temperature-adjusted gas such as air into a test section.

Conventionally, a thermal shock test apparatus disclosed in the following Patent Document 1 and an environmental test apparatus capable of performing a test by introducing a gas such as temperature-adjusted air into a test section like the thermal cycle test apparatus are provided. Has been. In the conventional environmental test equipment, operation is performed in a high temperature exposure mode in which a gas adjusted to a high temperature is introduced into the test section and the specimen is exposed to a high temperature atmosphere, and a gas adjusted to a low temperature is introduced into the test section to reduce the temperature. It is supposed that the test is performed by applying a thermal shock to the specimen by repeatedly performing a cooling cycle operation in which the operation in the low temperature exposure mode in which the specimen is exposed to the atmosphere is sequentially performed.
Japanese Patent Laid-Open No. 11-160217

  As described above, in a test apparatus that conducts a thermal shock test by introducing a gas whose temperature is adjusted to a predetermined temperature into the test unit, the ambient temperature in the test unit and the temperature of the specimen installed in the test unit are predetermined. It took time to reach the test temperature. Usually, in the thermal shock test, the above-described thermal cycle is repeated several hundreds of cycles or more, so the period of time until the ambient temperature in the test section or the temperature of the specimen reaches the test temperature can be shortened as much as possible. It was desired.

  Based on the above knowledge, the present inventors make the ambient temperature in the test section reach a predetermined test temperature as soon as possible when switching the operation mode to the high temperature exposure mode or the low temperature exposure mode in carrying out the cooling cycle operation. Therefore, the introduction of a gas whose temperature was adjusted to a high or low temperature beyond the test temperature was examined. However, even when such a measure is adopted, there is a limit to the improvement of the temperature change rate such as the atmospheric temperature in the test section, and the implementation period of the cooling / heating cycle operation cannot be significantly shortened.

  In view of the above, an object of the present invention is to provide an environmental test apparatus capable of greatly reducing the test time.

The environmental test apparatus of the present invention provided to solve the above-described problems includes a test unit in which a specimen is installed and a temperature control unit that adjusts the temperature of gas supplied to the test unit. The temperature control unit can adjust the temperature of the gas introduced into the test unit to a predetermined temperature, and can blow the gas whose temperature is adjusted by the temperature control unit toward the test unit. A high temperature exposure mode in which a gas adjusted to a high temperature is introduced into the test section and the specimen is exposed to a high temperature atmosphere, and a gas adjusted to a low temperature is introduced into the test section to provide a low temperature atmosphere. It is possible to repeatedly perform a series of cooling and heating cycle operations configured by combining a plurality of operation modes including a low temperature exposure mode in which the specimen is exposed below, and the air blowing means controls the wind speed of the gas introduced to the test section. Adjustable, high temperature exposure mode and When switching the operation mode to the warm exposure mode, the high temperature exposure mode is reached after the wind speed of the gas introduced to the test section reaches the predetermined temperature during the transition period until the ambient temperature in the test section reaches the predetermined temperature. Alternatively, in the test period until the low temperature exposure mode is completed, it is higher than the wind speed of the gas introduced to the test section, and the temperature control section adjusts the gas to a high temperature and the gas to a low temperature. A low temperature side temperature control unit, and a temperature control damper is operable between the test unit and the high temperature side temperature control unit, and between the test unit and the low temperature side temperature control unit. The temperature control damper has a flow path forming surface facing the temperature control unit side and a contact surface facing the test unit side in a state where the opening portion is closed, and the contact surface There is an inclined surface inclined at a predetermined angle with respect to the test section and the front When one of the temperature control damper disposed between the high temperature side temperature control unit and the temperature control damper disposed between the test unit and the low temperature side temperature control unit is in an open state, the open state The temperature control damper that has become tilted with respect to the other temperature control damper in the closed state and opened, but the flow path forming surface forms a series of slopes with the inclined surface provided on the other side is characterized in comprising that the (claim 1).

In the environmental test apparatus according to the present invention, when the operation mode is switched to the high temperature exposure mode or the low temperature exposure mode, it is introduced into the test section by the blowing means during the transition period until the ambient temperature in the test section reaches a predetermined temperature. The gas wind speed is set to be higher than the gas wind speed introduced to the test section in the test period from when the predetermined temperature is reached until the high temperature exposure mode and the low temperature exposure mode are completed. Therefore, in the environmental test apparatus of the present invention, the gas whose temperature has been adjusted to the predetermined temperature is successively introduced into the test part and replaced with the gas in the test part during the transition period when the operation mode is switched. Therefore, according to the environmental test apparatus of the present invention, the ambient temperature in the test section and the temperature of the specimen installed in the test section can be quickly reached a predetermined temperature, greatly increasing the test period of the thermal shock test. It can be shortened.
Moreover, according to this structure, the gas which flows toward a test part from a temperature control part is guided to a flow-path formation surface or an inclined surface, and flows smoothly.

  Here, the above-described environmental test apparatus can be operated in a standby state in which a gas whose temperature is adjusted is circulated in a region outside the test unit and waits. In such a configuration, if the gas is circulated at a higher speed than necessary in the standby state, the temperature of the gas becomes unstable due to the influence of stirring heat, or excessive energy is required to adjust the gas to a predetermined temperature. There is a possibility.

  Based on this knowledge, the above-described environmental test apparatus of the present invention has a gas supply state in which the temperature adjustment unit supplies the temperature-adjusted gas to the test unit, and the temperature-adjusted gas is removed from the test unit. When the operation is possible in the standby state of circulating in the area, the gas circulation speed in the standby state is lower than the wind speed of the gas supplied to the test unit in the gas supply state. (Claim 2).

  With such a configuration, it is possible to suppress the gas temperature from becoming unstable due to the influence of the above-described stirring heat, or to suppress excessive energy consumption for adjusting the gas temperature.

  Here, in the environmental test apparatus of the present invention described above, in order to expose the specimen to a uniform temperature atmosphere regardless of the installation site, the gas supplied toward the test section has a substantially uniform flow rate regardless of the site. It is desirable to flow in.

Based on this knowledge, the air flow path a through which the gas introduced into the test section flows and the air flow path b intersecting the air flow path a are opened, and the air flow is opened by opening the temperature control damper. becomes inflow and outflow is possible communication with the gas between the test portion and the temperature control unit through the path b, the flow path forming surface the air flow path a in the communication state, and the surface to b, in the communication state It is desirable that the flow path forming surface and the inner peripheral surface of the air blowing path a be in a continuous state (claim 3).

  In the environmental test apparatus of the present invention, when the temperature control damper is opened and is in a communicating state, the flow path forming surface facing both the air flow paths a and b is in a state continuous with the inner peripheral surface of the air flow path a. Therefore, in the environmental test apparatus of the present invention, even when the gas flows from the temperature control unit toward the test unit at a large flow rate, the gas is guided to the flow path forming surface and smoothly flows into the air blowing path a. . Therefore, in the environmental test apparatus of the present invention, gas can be supplied to the test section at a substantially uniform flow rate regardless of the site, and the specimen can be exposed to a uniform temperature atmosphere regardless of the installation site. .

The environmental test apparatus according to the present invention described above is arranged so that the temperature control dampers can be operated independently, and when the temperature control damper is in the closed state, the inclined surface is the inner periphery of the air flow path a. A temperature control damper that is continuous with the surface and disposed between the test section and the high temperature side temperature control section, and a temperature control damper disposed between the test section and the low temperature side temperature control section When one of the temperature control dampers is in the open state, the temperature control damper in the open state contacts the other temperature control damper in the closed state in an inclined state, and the flow of the one temperature control damper in the open state The environmental test apparatus according to claim 3 , wherein the path forming surface and the inclined surface provided in the closed temperature control damper are in a continuous state. (Claim 4).

  According to such a configuration, the flow path forming surface of the temperature adjustment damper that is in the open state is in a state that continues to the inner peripheral surface of the blower path a through the inclined surface provided in the temperature adjustment damper that is in the closed state. Therefore, according to the structure mentioned above, the gas which flows toward a test part from a temperature control part will be guided to a flow path formation surface or an inclined surface, and will flow into the ventilation path a smoothly. Therefore, according to the environmental test apparatus of the present invention, the gas can be supplied toward the test section at a substantially uniform flow rate regardless of the site, and the specimen can be exposed to a uniform temperature atmosphere regardless of the installation site.

  In the environmental test apparatus of the present invention described above, the angle formed by the contact surface and the inclined surface is preferably the same as the angle formed by the temperature adjustment damper in the closed state and the temperature adjustment damper in the open state. ).

  In such a configuration, when the temperature control damper is opened, it will be in a continuous state from the contact surface to the inclined surface at a constant angle, so that the gas will not stagnate locally but smoothly from the temperature control unit to the test unit Flowing. Therefore, according to the present invention, the specimen can be exposed to a uniform temperature atmosphere regardless of the installation site.

  In the environmental test apparatus of the present invention described above, a temperature control damper is provided between the test unit and the temperature control unit, and gas can be introduced from the temperature control unit to the test unit by opening the temperature control damper. An internal circulation channel capable of circulating gas and an internal damper capable of opening and closing the internal circulation channel are provided in the temperature control unit, The damper is connected so as to be interlocked with the temperature control damper via an interlocking mechanism. By opening the temperature control damper, the air flow paths a and b are brought into communication, and the internal damper is connected to the internal circulation channel. When the temperature control damper is closed, the air flow paths a and b may be disconnected and the internal damper may be opened (Claim 6).

  In the environmental test apparatus of the present invention, when the temperature control damper is opened, the air flow path b and the air flow path a are in communication with each other, and the temperature-adjusted gas flows through the internal circulation flow path. It flows toward the test part. On the other hand, in the environmental test apparatus of the present invention, when the temperature control damper is closed, the air flow path b and the air flow path a are in communication with each other, and the gas can be circulated in the temperature control unit. Therefore, in the environmental test apparatus of the present invention, an optimal gas circulation system can be selected as appropriate by opening and closing the temperature control damper.

  In the above-described environmental test apparatus of the present invention, it is desirable that the flow path forming surface of the temperature control damper is provided with a rectifying means for rectifying the flow of gas flowing between the temperature control unit and the test unit ( Claim 7).

  According to such a configuration, the gas flows smoothly between the temperature control unit and the test unit, the momentum of the gas introduced into the test unit is weakened, or the gas flow is uneven depending on the part. It can be minimized.

  In the environmental test apparatus of the present invention described above, the test unit may include a test unit main body through which gas can flow in and out, and a specimen installation unit that can be attached to and detached from the test unit main body. (Claim 8).

  In the environmental test apparatus of the present invention, the test unit includes the test unit main body and a specimen installation unit that can be attached to and detached from the test unit main body. It can be installed in an easy place. Moreover, according to the environmental test apparatus of this invention, it is also possible to remove a test piece installation part from a test part main body, to move to another place, and to perform a different test.

  Moreover, the environmental test apparatus of this invention mentioned above may be able to take out the connection terminal electrically connected with respect to the test body distribute | arranged inside the test part to the outer side of a test part ( Claim 9).

  According to the environmental test apparatus of the present invention, for example, to a connection terminal electrically connected to the specimen, a measuring device for measuring electrical characteristics provided outside the test unit is connected. Measure the electrical characteristics of the specimen with the measuring device, or connect the power supply to the connection terminal to perform the thermal shock test of the specimen in a state where electric power is applied. Tests on the electrical properties of the specimen can be easily performed.

  ADVANTAGE OF THE INVENTION According to this invention, the environmental test apparatus which can shorten test time significantly can be provided.

  Subsequently, a thermal shock test apparatus 1 (hereinafter also simply referred to as a test apparatus 1) according to an embodiment of the environmental test apparatus of the present invention will be described in detail with reference to the drawings. In the following description, the positional relationship such as up / down / left / right, depth, and height will be described based on the normal installation state shown in FIG. 1 unless otherwise specified.

  As shown in FIG. 1, the thermal shock test apparatus 1 has a housing 2. The housing | casing 2 has a rectangular parallelepiped shape, and the outer periphery is enclosed by the outer wall which has heat insulation. As shown in FIG. 2, the thermal shock test apparatus 1 includes a test unit 3 and a temperature control unit 5 inside the housing 2. The test unit 3 is located at a substantially central portion in the height direction in the housing 2. The test unit 3 includes a test chamber 10, an entrance side space 11, and an exit side space 12. The test chamber 10 has a cage-shaped frame 13a (test unit main body) built in the housing 2 and a specimen installation container 13b (test specimen installation unit) that is detachable from the frame 13a. .

  The specimen installation container 13b can be attached to and detached from the test chamber 10 through an opening 2b provided in the front wall 2a that forms the front of the housing 2. Specifically, the specimen installation container 13b has a drawer shape as shown in FIG. 1 (a), and can be pulled out from the housing 2 side as needed as shown in FIG. 1 (b). It is configured. The specimen installation container 13b has a closing portion 14 that closes the opening 2b of the front wall 2a in a state of being attached to the test chamber 10, and a bowl-shaped storage portion 15 that is integrally attached thereto. . The closing portion 14 is made of a heat-insulating material like the front wall 2a of the housing 2.

  As shown in FIG. 1, the closing portion 14 is provided with a wiring connection portion 17. The wiring connection portion 17 has a wiring slit 17 a provided in a portion exposed to the outside (front wall 2 a side) of the housing 2 in a state where the specimen installation container 13 b is installed in the test chamber 10. As shown in FIG. 1B, the wiring slit 17 a includes a wiring 17 b that is electrically connected to a measuring device for measuring electrical characteristics provided separately from the test apparatus 1. Can be used to remove from the inside to the outside.

  The accommodating portion 15 is sized to fit in the test chamber 10 with almost no gap. A plurality of specimens can be arranged side by side in the accommodating portion 15. Inside the housing part 15, a terminal part (internal terminal part) for connecting a specimen capable of electrically connecting a specimen such as an electric / electronic board is provided by soldering or the like. This internal terminal portion (not shown) is electrically connected to the wiring 17b described above. Therefore, the specimen is electrically connected to an internal terminal portion (not shown) provided inside the accommodating portion 15, and the wiring 17 b taken out to the outside of the test chamber 10 through the wiring slit 17 a is connected. When measuring equipment is connected, the electrical characteristics of the specimen can be measured.

  The inlet side space 11 and the outlet side space 12 are provided at positions adjacent to the test chamber 10, respectively. Thereby, in the test part 3, the ventilation path | route 16 (blower path | route a) from the entrance side space 11 to the exit side space 12 through the test chamber 10 is formed. The inlet side space 11 is a portion into which air whose temperature has been adjusted flows from a temperature control unit 5 described in detail later. Further, the outlet side space 12 is a position adjacent to the test chamber 10 on the opposite side to the inlet side space 11, and is a portion into which air that has passed through the test chamber 10 flows.

  The temperature adjustment unit 5 includes a high temperature side temperature adjustment unit 20 disposed above the test unit 3 and a low temperature side temperature adjustment unit 21 disposed below the test unit 3. The high temperature side temperature control unit 20 is divided into a heating unit 31 and an internal circulation duct 32 through a partition 30 arranged substantially horizontally. The heating unit 31 is provided with a heater 34 (temperature adjusting means) and a blower 35 (blower means). Further, as shown in FIGS. 3 and 4, the internal circulation duct 32 is provided with an internal damper 36. Furthermore, between the high temperature side temperature control unit 20 and the entrance side space 11 of the test unit 3 and between the high temperature side temperature control unit 20 and the exit side space 12, high temperature side temperature control dampers 37 and 37 are respectively provided. They are arranged so as to have a symmetrical positional relationship via the test chamber 10.

  The heater 34 can heat the air flowing into the heating unit 31. The blower 35 is in a position adjacent to the heater 34, and can suck in air heated by the heater 34 and blow it out at a predetermined wind speed. The blower 35 is located above the portion of the test unit 3 where the inlet-side space 11 is provided, and can blow toward the inlet-side space 11 (lower side) by opening the high-temperature side temperature control damper 37. It is installed with the air outlet facing. Therefore, when the blower 35 is operated with the high temperature side temperature control dampers 37 and 37 opened, the air heated by the heater 34 reaches the high temperature side temperature control damper 37 from the blower opening of the blower 35 (hereinafter, The air is blown toward the test unit 3 through a delivery path 38 (also referred to as a blowing path b). Further, the air blown to the test unit 3 passes through the high temperature side temperature adjustment damper 37 on the outlet side space 12 side through the air supply path 16 formed in the test unit 3 and returns to the high temperature side temperature adjustment unit 20. The air that has flowed into the high temperature side temperature control unit 20 is a region formed between the high temperature side temperature control damper 37 and the heater 34 (hereinafter also referred to as a return flow path 39 (air supply path b)) and the air supply path 16. It flows in the intersecting direction (in the present embodiment, the direction substantially orthogonal), and returns to the heater 34 again. In this way, the air heated by the heater 34 circulates between the high temperature side temperature control unit 20 and the test unit 3. On the other hand, the high temperature side temperature adjustment unit 20 closes the high temperature side temperature adjustment dampers 37 and 37 and operates the blower 35 with the internal damper 36 opened, thereby appropriately heating the air with the heater 34 and the heating unit Air can be circulated between 31 and the internal circulation duct 32.

  The low temperature side temperature control part 21 is divided into left and right via a partition 40 whose internal space is arranged in the vertical direction. Further, inside the low temperature side temperature control unit 21, there is an internal circulation duct 42 formed between the test unit 3 by a partition 40 and a partition 41 formed in series. An evaporator 46 (temperature adjustment means) is provided in a space (hereinafter also referred to as an inflow side space 43) formed on the left side of the partition 40 in the low temperature side temperature adjustment unit 21. Further, in the space on the right side of the partition 40 (hereinafter also referred to as the outflow side space 44), a temperature adjusting heater 48 and a blower 49 (blowing means) are provided vertically. An internal damper 50 is provided in the internal circulation duct 42.

  The inflow side space 43 and the outflow side space 44 communicate with each other via a communication portion formed below the partition 40. Between the portion on the inflow side space 43 side of the low temperature side temperature control unit 21 and the outlet side space 12 of the test unit 3 and between the portion on the outflow side space 44 side and the inlet side space 11, The adjustment dampers 47 and 47 are arranged so as to have a symmetrical positional relationship via the test chamber 10.

  The evaporator 46 can cool the air flowing into the inflow side space 43 through heat exchange with a refrigerant sent from a refrigerator (not shown). The temperature adjusting heater 48 is provided in the outflow side space 44 at a position downstream in the air flow direction when the blower 49 is operated with respect to the evaporator 46. The temperature adjusting heater 48 is for adjusting the temperature to an appropriate temperature by heating the air that has passed through the evaporator 46 when the temperature is lower than necessary, and can be appropriately operated as necessary. Has been.

  The blower 49 is disposed above the temperature adjustment heater 48 and can blow air adjusted to a low temperature by the evaporator 46 and the temperature adjustment heater 48. The blower 49 is located below the portion of the test unit 3 where the inlet-side space 11 is provided, and is arranged so that the blower port faces the inlet-side space 11 side (upper side). Therefore, when the blower 49 is operated with the low temperature side temperature control dampers 47 and 47 opened, the air cooled by the evaporator 46 reaches the low temperature side temperature control damper 47 from the blower opening of the blower 49 (hereinafter referred to as “the low temperature side temperature control damper 47”). The air is blown toward the test unit 3 through a delivery path 51 (also referred to as a blowing path b). Further, the air blown to the test unit 3 passes through the test unit 3 and returns to the low temperature side temperature control unit 21 through the low temperature side temperature control damper 47 provided on the outlet side space 12 side. The air that has flowed into the low temperature side temperature control unit 21 intersects with the air supply path 16 in an area formed between the low temperature side temperature control damper 47 and the evaporator 46 (hereinafter also referred to as return path 53 (air supply path b)). In this direction (in the present embodiment, a direction substantially orthogonal), and returns to the evaporator 46 again. The air cooled by the evaporator 46 circulates between the low temperature side temperature control unit 21 and the test unit 3 in this way. Further, when the blower 49 is operated with the low temperature side temperature control dampers 47 and 47 closed and the internal damper 50 opened, the low temperature air temperature adjusted by the evaporator 46 and the temperature adjustment heater 48 is adjusted to the low temperature side temperature control. It can be circulated in the part 21.

  Here, in the test apparatus 1 of the present embodiment, the above-described high temperature side temperature adjustment damper 37, the low temperature side temperature adjustment damper 47, and the internal dampers 36 and 50 have a characteristic configuration as shown in FIGS. ing. Specifically, the high temperature side temperature control damper 37 has a flat plate shape and a damper main body 60. The damper main body 60 is a plate having a size capable of closing an opening provided at a boundary between the inlet side space 11 and the outlet side space 12 of the test unit 3 and the high temperature side temperature control unit 20. The damper main body 60 includes a flow path forming surface 61 facing the inside of the high temperature side temperature control unit 20 and a contact surface 62 facing the test unit 3 side in a state where the opening portion is closed (closed state). The damper main body 60 is pivotally supported by a support shaft 63 provided on one end side, and can be opened and closed around this.

  A vertical guide vane 65 (rectifying means) and a horizontal guide vane 66 (rectifying means) are provided on the flow path forming surface 61 side of the damper main body 60. The vertical guide vanes 65 are substantially strip-shaped plates formed of a metal plate or the like, and are attached to a plurality (two in this embodiment) perpendicular to the flow path forming surface 61 at a predetermined interval. It has been. Further, the vertical guide vane 65 is attached so that the surface of the flow path forming surface 61 expands from the side where the above-described support shaft 63 is provided toward the opposite side. The horizontal guide vane 66 is a flat plate formed of a metal plate or the like, and the end of the vertical guide vane 65 is parallel to the flow path forming surface 61 of the damper main body 60 or has an appropriate angle if necessary. It is attached. On the other hand, an inclined piece 67 is provided on the contact surface 62 side of the damper main body 60. The inclined piece 67 has a substantially triangular shape in cross section, and has an inclined surface 68 that forms a certain angle a with respect to the contact surface 62.

  The internal damper 36 is provided in the internal circulation duct 32 formed in the high temperature side temperature control unit 20. The internal damper 36 includes a shutter plate 70 that is rotatably supported by a support shaft 71. The shutter plate 70 is connected to the damper main body 60 of the above-described high temperature side temperature adjustment damper 37 via the link mechanism 72. As a result, the internal damper 36 enters an open state when the high temperature side temperature adjustment damper 37 is in a closed state (closed state) at an opening provided at the boundary between the test unit 3 and the high temperature side temperature adjustment unit 20. The high temperature side temperature adjustment damper 37 is associated with the operation of the high temperature side temperature adjustment damper 37 so that the high temperature side temperature adjustment damper 37 is in a closed state when the opening portion is in an open state (open state).

  The low temperature side temperature control damper 47 and the internal damper 50 have the same structure as the high temperature side temperature control damper 37 and the internal damper 36 described above. The damper main body 60 of the low temperature side temperature control damper 47 is attached so that the flow path forming surface 61 faces the inside of the low temperature side temperature control unit 21 and the contact surface 62 faces the test unit 3 side in the closed state. ing. In addition, the damper main body 60 of the low temperature side temperature adjustment damper 47 is arranged to face the damper main body 60 of the high temperature side temperature adjustment damper 37. Further, the damper main body 60 of the low temperature side temperature control damper 47 is such that the portion where the inclined piece 67 is provided is located on the test chamber 10 side and the portion where the support shaft 63 is provided is located away from the test chamber 10. Is attached.

  The internal damper 50 is provided in an internal circulation duct 42 formed in the low temperature side temperature control unit 21, and is connected to the damper main body 60 of the low temperature side temperature control damper 47 through a link mechanism 72. Accordingly, the operation of the internal damper 50 is related to be closed when the low temperature side temperature adjustment damper 47 is opened, and opened when the low temperature side temperature adjustment damper 47 is closed.

  As shown in FIG. 4, when one of the above-described high temperature side temperature adjustment damper 37 and low temperature side temperature adjustment damper 47 (in the illustrated state, the low temperature side temperature adjusting damper 47) is in the open state, the inclined piece 67 is in the other state (in the illustrated state). Then, it will be in the state contact | abutted to the contact surface 62 of the high temperature side temperature control damper 37). In this state, the damper main body 60 of the high temperature side temperature adjustment damper 37 and the low temperature side temperature adjustment damper 47 that are in the open state is at substantially the same angle a as the inclined surface 68 of the inclined piece 67 provided on the other side. Inclined state. In this state, among the high temperature side temperature control dampers 37 and 37 and the low temperature side temperature control dampers 47 and 47 arranged symmetrically via the test chamber 10, the low temperature side temperature control dampers 47 and 47 are provided on the inlet side space 11 side, Although in the open state, the flow path forming surface 61 constituting the damper main body 60 has delivery paths 38 and 51 (in the illustrated state, delivery paths) formed inside the high temperature side temperature control unit 20 and the low temperature side temperature control unit 21. 51), as well as the air blowing path 16 formed in the test section 3. Of the high temperature side temperature control dampers 37 and 37 and the low temperature side temperature control dampers 47 and 47, those provided on the outlet side space 12 side, which are in the open state, constitute the damper main body 60. The path forming surface 61 faces both the return paths 39 and 53 formed inside the high temperature side temperature control section 20 and the low temperature side temperature control section 21 and the air flow path 16 formed in the test section 3. Become. Further, in the state where the high temperature side temperature control damper 37 and the low temperature side temperature control damper 47 are in the open state, the flow path forming surface 61 of the open state has an inclined surface 68 provided on the other side and a series of slopes. Will be formed.

  Subsequently, the operation of the test apparatus 1 of the present embodiment will be described with reference to the drawings. The test apparatus 1 introduces air heated in the high temperature side temperature control unit 20 into the test unit 3, thereby exposing the specimen installed in the test chamber 10 to a high temperature atmosphere and a low temperature side. By introducing the air cooled in the temperature control unit 21 into the test unit 3, a cooling cycle operation configured in combination with a cold exposure mode in which the specimen installed in the test chamber 10 is exposed to a cold atmosphere is performed. , It can be repeated for a set number of cycles.

  When the test apparatus 1 operates in the high temperature exposure mode, as shown in FIGS. 6C and 6E, the high temperature side temperature adjustment damper 37 is opened and the low temperature side temperature adjustment damper 47 is closed. The In conjunction with this, the internal damper 36 provided in the high temperature side temperature control unit 20 is closed, and the internal damper 50 provided in the low temperature side temperature control unit 21 is opened. When the opening degree of the high temperature side temperature adjustment damper 37, the low temperature side temperature adjustment damper 47, and the internal dampers 36 and 50 is adjusted in this way, the air heated by the heater 34 in the high temperature side temperature adjustment unit 20 (hereinafter referred to as high temperature air). Also blown toward the inlet side space 11 of the test unit 3 by the blower 35 and circulates between the high temperature side temperature control unit 20 and the test chamber 3. At this time, the high-temperature air circulates while being rectified by the vertical guide vanes 65 and the horizontal guide vanes 66 provided on the flow path forming surface 61 of the high-temperature side temperature control damper 37 in the open state.

  Here, as shown in FIG. 6 (b), after the operation state of the test apparatus 1 is switched to the high temperature exposure mode, the transition period until the ambient temperature in the test chamber 10 reaches a predetermined set temperature TH is maintained. The air blowing capacity of the blower 35 is set to a high state, and the air blowing speed blown toward the test unit 3 is set to the transitional wind speed Vt. In the present embodiment, the power frequency of a fan rotation motor (not shown) of the blower 35 is set to 70 [Hz], and the transitional wind speed Vt is adjusted to 20 [m / sec].

  After the operation in the high temperature exposure mode is started, when the atmospheric temperature in the test chamber 10 reaches the set temperature TH, the air blowing capacity of the blower 35 is set lower than the above-described transition period, and air is blown toward the test unit 3 side. The ventilation speed is adjusted to the test period wind speed Ve which is lower than the transition period wind speed Vt. In this embodiment, the power frequency of the fan rotation motor of the blower 35 is set to 60 [Hz], and the test wind speed Ve is adjusted to 15 [m / sec].

  On the other hand, during the operation in the high temperature exposure mode, the low temperature side temperature control unit 21 enters a standby state. Even while the low temperature side temperature control unit 21 is in the standby state, the air is cooled by the evaporator 46, but the air blowing capacity of the blower 49 is set to a low state. Therefore, during operation in the high-temperature exposure mode, as shown in FIG. 6D, the air cooled to a low temperature is in the low-temperature temperature control unit 21, and the standby wind speed Vw is lower than the above-described test period wind speed Ve. Circulate with.

  After the operation in the high temperature exposure mode is started as described above, when the operation mode is switched to the low temperature exposure mode, the high temperature side temperature adjustment damper 37 is closed and the low temperature side temperature adjustment damper 47 is opened. It is said. In conjunction with this, the internal damper 36 provided in the high temperature side temperature control unit 20 opens the internal circulation duct 32, and the internal damper 50 provided in the low temperature side temperature control unit 21 includes the internal damper 50. The circulation duct 42 is closed.

  When the operation mode of the test apparatus 1 is switched to the low temperature exposure mode, the operation states of the high temperature side temperature adjustment unit 20 and the low temperature side temperature adjustment unit 21 are reversed from the operation state in the high temperature exposure mode. Specifically, when the operation mode is switched to the low temperature exposure mode, the blowing capacity of the blower 49 on the low temperature side temperature control unit 21 side during the transition period until the ambient temperature in the test chamber 10 reaches the predetermined set temperature TL. Is increased, and the blowing speed of air blown toward the test unit 3 is adjusted to the transitional wind speed Vt (20 [m / sec] in the present embodiment). Thereafter, when the ambient temperature in the test chamber 10 reaches the set temperature TL, the blowing capacity of the blower 49 is set lower than the above-described transition period, and the blowing speed is set to the test period wind speed Ve (Ve <Vt, 15 in this embodiment). [M / sec]).

  On the other hand, during the operation in the low temperature exposure mode, the high temperature side temperature control unit 20 switches to the standby state. If the high temperature side temperature control part 20 will be in a standby state, the ventilation capability of the air blower 35 will be in the further low state. As a result, the air heated by the heater 34 circulates in the high-temperature temperature control unit 20 at the standby wind speed Vw.

  After the operation in the low temperature exposure mode is started as described above, when the timing for ending the low temperature exposure mode is reached, a series of thermal cycle operations are completed for one cycle. The test apparatus 1 repeats the cooling / heating cycle operation for the set number of cycles.

  As described above, in the test apparatus 1 according to the present embodiment, after the operation mode is switched to the high temperature exposure mode or the low temperature exposure mode, the transition period until the ambient temperature in the test unit 3 reaches the set temperature TH, TL. The wind speed of air introduced into the test section 3 by the blowers 35 and 49 (transition period wind speed Vt) is set higher than the wind speed (test period wind speed Ve) in the test period after reaching the set temperatures TH and TL. Has been. For this reason, in the test apparatus 1, after the operation mode is switched, the transition period until the specimen can be exposed to the atmosphere of the set temperature TH, TL is extremely short, and the test period of the thermal shock test is greatly shortened. be able to.

  In the test apparatus 1 of the above embodiment, in a series of cooling and cycling operations, a transition period and a transition period from when the operation mode is switched until the ambient temperature in the test unit 3 reaches the set temperature TH, TL vicinity. In the test period from when the high temperature exposure mode and low temperature exposure mode are completed, air whose temperature is adjusted at a constant transition period wind speed Vt or test period wind speed Ve is supplied regardless of the type of specimen. However, the present invention is not limited to this, and the transition wind speed Vt and the test wind speed Ve may be appropriately adjusted according to the type of the specimen. Further, the transitional wind speed Vt and the test period wind speed Ve may be appropriately changed in the transition period and the test period.

  Further, the test apparatus 1 may adjust the magnitudes of the transition period wind speed Vt and the test period wind speed Ve using the set temperatures TH and TL as the target temperatures in the transition period after the operation mode is switched. Taking into account the influence of the heat capacity of the specimen and the test chamber 10, etc., the target temperature in the transition period may be set higher than the set temperature TH, or the air may be blown while being set lower than the set temperature TL. According to such a configuration, even if there are factors that hinder the rapid change of the ambient temperature of the test chamber 10 or the temperature of the test sample itself, such as a large heat capacity of the test sample or the test chamber 10, The influence by can be suppressed to the minimum.

  In the test apparatus 1 of the present embodiment, the low temperature side temperature adjustment unit 21 is in a standby state during operation in the high temperature exposure mode, and the high temperature side temperature adjustment unit 20 is in standby state during the operation in the low temperature exposure mode. At this time, in the low temperature side temperature control unit 21 and the high temperature side temperature control unit 20 in the standby state, the temperature-adjusted air is outside the test unit 3, that is, in the low temperature side temperature control unit 21 or the high temperature side temperature control unit. The air speed (standby wind speed Vw) is lower than the transitional wind speed Vt and the test wind speed Ve, which are wind speeds when air is supplied to the test unit 3. ing. Therefore, even if the high temperature side temperature control unit 20 and the low temperature side temperature control unit 21 are in a standby state, the test apparatus 1 is configured so that the temperature of the air circulating inside in preparation for switching the operation mode is the heat of stirring. It is difficult to cause problems such as instability due to the influence of the air and excessive energy required to adjust the air temperature.

  In the said embodiment, when the high temperature side temperature control part 20 and the low temperature side temperature control part 21 are in a standby state, air is flowed by flowing into the internal circulation ducts 32 and 42 formed in these inside. Although the configuration of internal circulation is illustrated, the present invention is not limited to this. Specifically, when the high temperature side temperature control unit 20 and the low temperature side temperature control unit 21 are in a standby state, a circulation channel is provided that can circulate air in a region outside the test unit 3. It is good also as a structure. Moreover, in the said embodiment, although the high temperature side temperature control part 20 and the low temperature side temperature control part 21 were act | operated in the standby state suitably, the structure which adjusts temperature, circulating air in preparation for the switching of an operation mode was illustrated. The present invention is not limited to this, and air may not be circulated in the high temperature side temperature control unit 20 or the low temperature side temperature control unit 21 in the standby state.

  As described above, in the test apparatus 1, the high temperature side temperature adjustment damper 37 provided between the high temperature side temperature adjustment unit 20 and the test unit 3 or the low temperature side temperature adjustment unit 21 and the test unit 3 is provided. The damper main body 60 constituting the low temperature side temperature control damper 47 has a flow path forming surface 61. Further, when one of the temperature control dampers 37 and 47 is in an open state, the flow path forming surface 61 and the inner peripheral surface of the test unit 3 forming the air blowing path are in the closed state of the temperature control dampers 37 and 47. There is a continuous state through an inclined surface 68 provided on the contact surface 62 side. Therefore, even if the air flows from the temperature control unit 5 toward the test unit 3 at a high speed, the test apparatus 1 is guided to the flow path forming surface 61 without stagnation locally and smoothly in the test unit 3. It flows into the ventilation path 16 and is supplied to the test chamber 10. Therefore, in the test apparatus 1 of the present embodiment, air can be supplied at a substantially uniform flow rate regardless of the site in the test unit 3, and the temperature is almost uniform regardless of the position where the specimen is installed. Can be exposed.

  In the said embodiment, although the structure which provided the inclined piece 67 in each of the two temperature control dampers 37 and 47 (high temperature side temperature control damper 37, low temperature side temperature control damper 47) opposingly arranged was illustrated, this invention is It is not limited to this, and when air stagnation as described above does not occur, or when air flow is somewhat uneven, air flow velocity decrease and air flow turbulence do not occur so much , Any one or both may be omitted. In the case of such a configuration, the configuration of the test apparatus 1 can be simplified.

  Moreover, in the said embodiment, although the temperature control dampers 37 and 47 each illustrated the structure which has distribute | arranged to both the entrance side space 11 side and the exit side space 12 side of the test part 3, this invention is limited to this. Instead, it may be configured to be provided only on either the inlet side space 11 side or the outlet side space 12 side. Even in the case of such a configuration, the device configuration of the test apparatus 1 can be simplified.

  Moreover, the temperature control dampers 37 and 47 are not provided with the inclined piece 67 on the contact surface 62, but the shape of the damper main body 60 is changed to the temperature control dampers 37 and 47 when the flow path forming surface 61 itself is in the open state. It is good also as a shape which can be contact | abutted so that it may continue to the contact surface 62 of the thing of a closed state among them, and the internal peripheral surface of the test part 3. FIG. With such a configuration, it is possible to minimize the occurrence of a portion where the air flow is stagnant when the temperature control dampers 37 and 47 are opened, as in the test apparatus 1 described above.

  In the above-described embodiment, the flow path forming surface 61 and the inclined surface 68 are exemplified in a configuration in which the cross-sectional shape extends linearly, but the present invention is not limited to this, and the cross-sectional shape is curved. It may be.

  Further, as described above, the test apparatus 1 of the present embodiment has a structure in which the high temperature side temperature adjustment damper 37 and the low temperature side temperature adjustment damper 47 each support one end (fixed end) side of the damper main body 60 by the support shaft 63. It is said that. The high temperature side temperature adjustment damper 37 and the low temperature side temperature adjustment damper 47 are arranged so as to face each other, and one of the temperature adjustment dampers 37 and 47 (the low temperature side temperature adjustment damper 47 in FIG. 4) opens. And this will be in the state contact | abutted in the position of the free end side of the other (FIG. 4 high temperature side temperature control damper 37). Therefore, in the temperature control dampers 37 and 47 that are in the closed state (the high temperature side temperature control damper 37 in FIG. 4), not only the fixed end side is supported by the support shaft 63 but also the free end side is the temperature control damper. It will be in the state supported by what is open among 37 and 47 (in FIG. 4, the low temperature side temperature control damper 47), and will be in the state closed firmly.

  Further, in the test apparatus 1, the air flow is guided by the temperature control dampers 37 and 47, so that the test chamber 1 can flow into the test chamber 10 at a substantially uniform flow rate regardless of the site, and the temperature atmosphere to which the specimen is exposed is changed. It can be made almost uniform. Therefore, the thermal shock test performed by the test apparatus 1 has high test accuracy regardless of the installation position of the specimen. Further, when the thermal shock test is performed by the test apparatus 1, since the temperature atmosphere to which the specimen is exposed is high, it is not necessary to take an excessively long operating time in the high temperature exposure mode or the low temperature exposure mode. Only the test time can be shortened.

  As described above, in the test apparatus 1, the damper main bodies 60 and 60 forming the high temperature side temperature adjustment damper 37 and the low temperature side temperature adjustment damper 47 are connected to the internal dampers 36 and 50 via the link mechanisms 72 and 72, respectively. The temperature control dampers 37 and 47 operate in conjunction with opening and closing. Further, since the internal dampers 36 and 50 are closed when the high temperature side temperature adjustment damper 37 and the low temperature side temperature adjustment damper 47 are opened, respectively, the high temperature side temperature adjustment unit 20 and the low temperature side temperature adjustment unit 21 are connected to the test unit. 3 is prevented from flowing into the internal circulation ducts 32 and 42 formed in the high-temperature side temperature control unit 20 and the low-temperature side temperature control unit 21 when the air is to be supplied to the temperature control unit 3. can do. On the other hand, since the internal dampers 36 and 50 are related to open when the high temperature side temperature adjustment damper 37 and the low temperature side temperature adjustment damper 47 are closed, respectively, the high temperature side temperature adjustment unit 20 and When the low temperature side temperature control unit 21 is in the standby state, air can be internally circulated through the internal circulation ducts 32 and 42. Therefore, according to the above-described configuration, the air circulation path whose temperature is adjusted by the high temperature side temperature adjustment unit 20 or the low temperature side temperature adjustment unit 21 simply by opening and closing the high temperature side temperature adjustment damper 37 or the low temperature side temperature adjustment damper 47. Can be appropriately optimized.

  In the above embodiment, the configuration in which the high temperature side temperature adjustment damper 37 or the low temperature side temperature adjustment damper 47 and the internal dampers 36 and 50 are connected via the link mechanism 72 is exemplified, but the present invention is not limited to this. The high temperature side temperature control damper 37, the low temperature side temperature control damper 47, and the internal dampers 36 and 50 may be connected to each other via another mechanism, and the two may be connected to operate. Further, the test apparatus 1 may be configured such that the high temperature side temperature adjustment damper 37, the low temperature side temperature adjustment damper 47, and the internal dampers 36 and 50 can operate independently.

  As described above, the high temperature side temperature adjustment damper 37 and the low temperature side temperature adjustment damper 47 have the vertical guide vane 65 and the horizontal guide vane 66 on the flow path forming surface 61, and thereby the temperature adjustment unit 5, the test unit 3, and the like. The flow of air flowing between them can be rectified. Therefore, in the test apparatus 1, air is rectified between the temperature control unit 5 and the test unit 3 and flows smoothly, the momentum of the gas introduced into the test unit 3 is weakened, or the air flow is uneven depending on the part. It is possible to perform a thermal shock test by exposing the specimen to a substantially uniform temperature atmosphere regardless of the installation position.

  In the above-described embodiment, the configuration in which both the vertical guide vane 65 and the horizontal guide vane 66 are provided as the rectifying means for rectifying the air flow is illustrated, but the present invention is not limited to this, and for example, the vertical It is also possible to adopt a configuration in which one or both of the guide vane 65 and the horizontal guide vane 66 are omitted. Further, the mounting angle of the vertical guide vane 65 and the horizontal guide vane 66 is appropriately adjusted in consideration of the supply state of air supplied from the temperature control unit 5 side, the positional relationship of the test unit 3 and the temperature control unit 5, and the like. May be.

  The test apparatus 1 is provided so that the test chamber 10 can be attached to and detached from the frame 13a formed in a cage shape so that air can flow in and out. Therefore, the test apparatus 1 can be installed at a place where the specimen is easily installed by removing the specimen installation part from the frame 13a, and is excellent in convenience in carrying out the thermal shock test.

  Further, in the test apparatus 1, the wiring connection portion 17 provided in the test unit 3 has a wiring slit 17 a exposed to the outside of the housing 2, and is electrically connected to the specimen within the test unit 3. The connected wiring 17b can be taken out of the housing 2 through the wiring slit 17a. Therefore, for example, the test apparatus 1 measures the electrical characteristics of the specimen with the measurement device by connecting a measurement device for measuring the electrical characteristics to the wiring 17b, or connects the power source to the wiring 17b. Thus, it is possible to easily perform a test on the electrical characteristics of the specimen accompanying the thermal shock test, such as performing a thermal shock test of the specimen in a state where electric power is applied. Moreover, since the test part 3 can remove the specimen installation container 13b from the frame 13a as mentioned above, it moves the specimen installation container 13b to the place where the above-described measuring instrument and power source are provided, and the specimen. A test different from the thermal shock test for can be performed.

  In the above embodiment, the wiring slit 17a is provided and the wiring 17b can be taken out to the outside of the test unit 3 and the housing 2 through this, but the present invention is not limited to this, The wiring slits 17a may not be provided. In addition, instead of providing the wiring slit 17a, a connection terminal for connecting an external device or the like is provided, and a test piece arranged in the test section 3 and the external device or the like can be electrically connected via this connection terminal. It is good.

  The above-described test apparatus 1 has exemplified the configuration in which the specimen installation container 13b constituting the test chamber 10 is detachable from the frame 13a, but the present invention is not limited to this, and the specimen installation container 13b may be non-detachable, or the test chamber 10 may be a tank-like one as conventionally known.

  In the said embodiment, although the structure which air circulates between the test part 3 and the temperature control part 5 was illustrated, this invention is not limited to this, Other gas may circulate.

  The test apparatus 1 described above performs a so-called thermal shock test in which the temperature condition to which the specimen is exposed at the time of switching the operation mode is changed, but the present invention is not limited to this and the operation is not limited to this. You may perform the thermal cycle test which performs the temperature change at the time of mode switching more gently than a thermal shock test.

(A) is a perspective view which shows the thermal shock test apparatus which concerns on one Embodiment of this invention, (b) is a perspective view which shows a specimen installation container. It is a perspective view which shows the internal structure of the thermal shock test apparatus shown in FIG. 1, (a) is a perspective view which shows the state during operation in high temperature exposure mode, (b) is the state in operation in low temperature exposure mode. It is a perspective view shown. It is a principal part enlarged view which shows the state when the high temperature side temperature control damper and low temperature side temperature control damper of the thermal shock test apparatus shown in FIG. 1 are a closed state. It is a principal part enlarged view which shows a state when the low temperature side temperature control damper of the thermal shock test apparatus shown in FIG. 1 is an open state. It is an A direction arrow directional view of FIG. (A) is the ambient temperature in the test chamber, (b) is the output of the blower provided in the high temperature side temperature adjustment unit, (c) is the opening and closing of the high temperature side temperature adjustment damper, (d) is the blower provided in the low temperature side temperature adjustment unit. Output, (e) is a timing chart showing the transition of opening and closing of the low temperature side temperature control damper.

1 Thermal shock test equipment (environmental test equipment)
3 Test Unit 5 Temperature Control Unit 10 Test Chamber 13a Frame (Test Unit Body)
13b Specimen installation container (Specimen installation part)
16 Air supply path (Air supply path a)
17 Wiring connection portion 17a Wiring slit 20 High temperature side temperature adjustment portion 21 Low temperature side temperature adjustment portion 34 Heater (temperature adjustment means)
35, 49 Blower (Blower)
36, 50 Internal damper 37 High temperature side temperature control damper 38, 51 Delivery path (blower path b)
46 Evaporator (temperature control means)
47 Low Temperature Side Temperature Control Damper 61 Channel Forming Surface 62 Abutment Surface 65 Vertical Guide Vane (Rectifying Means)
66 Horizontal guide vanes (rectifying means)
67 Inclined piece 68 Inclined surface a Angle Vt Transitional wind speed Ve Test wind speed Vw Standby wind speed TH Set temperature TL Set temperature

Claims (9)

A test section where the specimen is installed;
A temperature control unit that adjusts the temperature of the gas supplied to the test unit, and
The temperature control unit is capable of adjusting the gas introduced to the test unit to a predetermined temperature, and the blower unit capable of blowing the gas temperature-adjusted by the temperature control unit toward the test unit. And having
High-temperature exposure mode in which a gas adjusted to a high temperature is introduced into the test section to expose the specimen in a high-temperature atmosphere, and low-temperature exposure in which a gas adjusted to a low temperature is introduced into the test section to expose the specimen in a low-temperature atmosphere. It is possible to repeatedly perform a series of thermal cycle operations configured by combining a plurality of operation modes including modes,
The air blowing means can adjust the wind speed of the gas introduced to the test section,
When the operation mode is switched to the high temperature exposure mode and the low temperature exposure mode, the air velocity of the gas introduced to the test section reaches the predetermined temperature during the transition period until the ambient temperature in the test section reaches the predetermined temperature. Higher than the wind velocity of the gas introduced to the test part during the test period from the high temperature exposure mode to the completion of the low temperature exposure mode,
The temperature adjustment unit has a high temperature side temperature adjustment unit that adjusts the gas to a high temperature, and a low temperature side temperature adjustment unit that adjusts the gas to a low temperature ,
Between the test section and the high temperature side temperature control section, and between the test section and the low temperature side temperature control section, a temperature control damper is arranged so as to be operable,
The temperature control damper has a flow path forming surface facing the temperature control portion side in a state where the opening portion is closed, and a contact surface facing the test portion side, and at a predetermined angle with respect to the contact surface. There is an inclined surface,
When one of the temperature control damper disposed between the test unit and the high temperature side temperature control unit and the temperature control damper disposed between the test unit and the low temperature side temperature control unit is in an open state. The temperature control damper in the open state is inclined with respect to the other temperature control damper in the closed state,
An environmental test apparatus characterized in that a flow path forming surface of an opened state forms a series of slopes with an inclined surface provided on the other side . The temperature control unit is operable in a gas supply state in which the temperature-adjusted gas is supplied to the test unit, and a standby state in which the temperature-adjusted gas is circulated in a region outside the test unit,
The environmental test apparatus according to claim 1, wherein the gas circulation speed in the standby state is lower than the wind speed of the gas supplied to the test unit in the gas supply state. A blowing path a through which the gas introduced into the test section flows, and a blowing path b intersecting the blowing path a,
By opening the temperature control damper, it becomes a communication state in which gas can flow in and out between the test section and the temperature control section via the air blowing path b.
Passage forming surface is a surface the blowing path a, the b in the communication state,
3. The environmental test apparatus according to claim 1, wherein in the communication state, the flow path forming surface and the inner peripheral surface of the air blowing path a are in a continuous state. The temperature control dampers are arranged so that they can operate independently,
When the temperature control damper is in a closed state, the inclined surface is continuous with the inner peripheral surface of the air passage a,
When one of the temperature control damper disposed between the test unit and the high temperature side temperature control unit and the temperature control damper disposed between the test unit and the low temperature side temperature control unit is in an open state. The temperature adjustment damper in the open state contacts the other temperature adjustment damper in the closed state in an inclined state, and the flow path forming surface of the one temperature adjustment damper in the open state and the closed The environmental test apparatus according to claim 3, wherein an inclined surface provided in the temperature control damper which is in a state is in a continuous state.   The environmental test apparatus according to claim 4, wherein an angle formed by the contact surface and the inclined surface is the same as an angle formed by the temperature control damper in the closed state and the temperature control damper in the open state. A temperature control damper is provided between the test unit and the temperature control unit, and by opening the temperature control damper, a communication state in which gas can be introduced from the temperature control unit to the test unit is achieved.
In the temperature control part, an internal circulation channel capable of circulating gas and an internal damper capable of opening and closing the internal circulation channel are provided,
The internal damper is connected so as to be interlocked with the temperature control damper via an interlocking mechanism,
By opening the temperature control damper, the air passages a and b are in a communication state, and the internal damper is in a state of closing the internal circulation flow path,
6. The environmental test apparatus according to claim 1, wherein closing the temperature control damper causes the air passages a and b to be in a non-communication state and an internal damper to be in an open state.   The flow path forming surface of the temperature control damper is provided with a rectifying means for rectifying the flow of gas flowing between the temperature control unit and the test unit. Environmental test equipment.   The environment according to claim 1, wherein the test unit includes a test unit main body through which gas can flow in and out, and a specimen installation unit that can be attached to and detached from the test unit main body. Test equipment.   The environmental test according to any one of claims 1 to 8, wherein a connection terminal electrically connected to a specimen placed inside the test section can be taken out of the test section. apparatus.

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