Temperature testing device

Abstract

The present invention provides a temperature testing apparatus that can shorten the time it takes for the temperature inside the test chamber to stabilize at the set temperature. [Solution] The temperature testing apparatus 1A comprises an opening 3a, a blower mechanism, a mounting surface 4g, and an air passage. The opening 3a is provided in part of the partition wall separating the inside and outside of the test chamber 3, and is provided for loading the object to be tested into the test chamber 3 and for loading the object to be tested out of the test chamber 3. The blower mechanism has an air outlet 10a provided at the top of the opening 3a, an air intake 10b provided at the bottom of the opening 3a, and a blower 6 that sends air from the intake 10b to the outlet 10a, forming an air curtain A1 along the opening 3a. The mounting surface 4g is provided inside the test chamber 3 and is on which the object to be tested is placed. The air passage is located inside the test chamber 3, in a region on the opposite side of the mounting surface 4g from the opening 3a, passing below the mounting surface 4g to the intake 10b.

Description

【Technical Field】 【0001】 The present invention relates to a temperature test device. 【Background Art】 【0002】 Electronic devices and their internal components (hereinafter referred to as "electronic devices, etc.") need to maintain predetermined functions and performance over a long period within a predetermined temperature range. For this reason, it is preferable to conduct a reliability test before shipping the product to detect in advance abnormalities in temperature characteristics, insufficient heat resistance, insufficient low-temperature resistance, insufficient durability, etc. in the electronic devices, etc. As a device used for this reliability test, there is a temperature test device (see, for example, Patent Document 1). 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2005-121256 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 As one aspect of a temperature test device, there is an open temperature test tank. The open temperature test tank has an opening that is always open for carrying the test object into the test tank and carrying the test object out of the test tank, and the inside and outside of the opening are separated by an air curtain. The temperature of the air blown out from the air curtain outlet is controlled to a temperature corresponding to the set temperature in the test tank, and by this air flowing into the test tank as well, the temperature in the test tank can be maintained near the set temperature. 【0005】 However, the space inside the test chamber needs to have sufficient depth to accommodate various sizes of the objects under test, and there is a problem in that the air from the air curtain outlet located at the opening does not easily reach the back of the test chamber. In particular, when the area inside the test chamber is rectangular, the air from the outlet does not easily reach the areas located in the four corners at the back. Consequently, the temperature in the back of the test chamber, especially in the four corners at the back, does not change easily, and it takes a long time for the temperature inside the test chamber to stabilize at the set temperature throughout. 【0006】 This invention has been made in view of the above-mentioned problems, and aims to provide a temperature testing apparatus that can shorten the time it takes for the temperature inside the test chamber to stabilize at the set temperature. [Means for solving the problem] 【0007】 [1] The temperature testing apparatus according to the present invention is a device for performing a temperature test on an object to be tested placed inside a test chamber by controlling the temperature inside the test chamber, and comprises an opening, a blower mechanism, a mounting surface, and an air passage. The opening is provided in part of the partition wall separating the outside of the test chamber from the inside of the test chamber, and is provided for loading the object to be tested into the test chamber and loading the object to be tested out of the test chamber. The blower mechanism has an air outlet provided at the top of the opening, an air intake provided at the bottom of the opening, and a blower that sends air from the intake to the outlet, forming an air curtain along the opening. The mounting surface is provided inside the test chamber and on which the object to be tested is placed. The air passage is located inside the test chamber, in a region opposite to the opening relative to the mounting surface, and passes below the mounting surface to the intake. 【0008】 The temperature testing apparatus according to the present invention is equipped with an air passage separate from the air curtain formed at the opening. This air passage extends from a region in the test chamber opposite the opening relative to the mounting surface, i.e., a region located at the back of the test chamber, through below the mounting surface, to the intake port of the blower mechanism. Since the air passage extends to the intake port of the blower mechanism, the end of the air passage becomes negative pressure due to the blowing force of the blower mechanism, causing air to flow through the air passage. The air flowing through this air passage is air that has flowed into the air passage from the back of the test chamber. As a result, the back of the test chamber becomes negative pressure, making it easier for the air flowing out from the blower mechanism's outlet to flow to the back of the test chamber. Thus, with the temperature testing apparatus of the present invention, the air flowing out from the blower mechanism's outlet can easily reach the back of the test chamber, thus shortening the time it takes for the temperature inside the test chamber to stabilize at the set temperature. Furthermore, with the temperature testing apparatus of the present invention, such effects can be obtained with an extremely simple configuration, such as providing an air passage that passes below the mounting surface. 【0009】 [2] In the temperature test apparatus described in [1] above, the mounting surface is included in the upper surface of a plate-shaped member provided in the test chamber, and the air passage may be formed in a region including the interior of the plate-shaped member. In this case, the plate-shaped member constituting the mounting surface also serves as the air passage, so a structure including an air passage can be easily realized. 【0010】 [3] In the temperature test apparatus described in [2] above, the air passage may include an internal space of a plate-shaped member, an air inlet formed on the upper surface of the plate-shaped member and connected to the internal space, and an air outlet formed on the first side surface on the opening side of the plate-shaped member and connected to the internal space. In this case, an air passage can be easily formed from the area at the back of the test chamber, passing below the mounting surface to the intake. 【0011】 [4] In the temperature test apparatus described in [3] above, the air passage may include a plurality of air inlets, and the plurality of air inlets may be arranged along the portion of the partition wall located on the opposite side of the opening from the mounting surface. In this case, the amount of air flowing into the air passage can be made more uniform along the partition wall at the back of the test chamber. Therefore, the air flowing out from the outlet of the blower mechanism can be distributed more uniformly at the back of the test chamber, and the time it takes for the temperature inside the test chamber to stabilize at the set temperature can be further shortened. 【0012】 [5] In the temperature test apparatus of [3] or [4] above, the air passage includes a first group of air outlets consisting of one or more air outlets and a second group of air outlets consisting of one or more air outlets, wherein the first group of air outlets is located in a region near one end in the width direction on the first side surface of the plate-shaped member, and the second group of air outlets is located in a region near the other end in the width direction on the first side surface of the plate-shaped member. In this case, the processing of the air outlets can be made easier, and even if liquid spills from a container placed on the upper surface of the plate-shaped member, the risk of the liquid entering the internal space through the air outlets can be reduced. 【0013】 [6] In any of the temperature testing apparatuses described in [3] to [5] above, the inner diameters of the air inlet and air outlet may be 10 mm or less. By reducing the inner diameters of the air inlet and air outlet in this way, the flow velocity at both the air inlet and air outlet can be increased. As a result, the flow velocity of the air flowing at the back of the test chamber also increases, further shortening the time it takes for the temperature inside the test chamber to stabilize at the set temperature. 【0014】 [7] In any of the temperature testing apparatuses described in [1] to [6] above, the mounting surface is included in the upper surface of a plate-shaped member provided in the test chamber, and the air passage may include a first gap between the second side of the plate-shaped member opposite to the opening side and the partition wall of the test chamber, and a second gap between the lower surface of the plate-shaped member and the bottom surface of the test chamber. In this case, since the air passage can be formed by the plate-shaped member constituting the mounting surface, a structure including an air passage can be easily realized. 【0015】 [8] In the temperature testing apparatus described in [7] above, the plate-shaped member may be configured to be able to be pulled out of the test chamber through the opening with its mounting surface. The temperature testing apparatus may further include a mechanism provided inside the test chamber that restricts the movement of the plate-shaped member to form a first gap. With this temperature testing apparatus, a structure including an air passage can be easily realized when the plate-shaped member can be pulled out of the test chamber. [Effects of the Invention] 【0016】 According to the present invention, a temperature testing apparatus can be provided that can shorten the time it takes for the temperature inside the test chamber to stabilize at the set temperature. [Brief explanation of the drawing] 【0017】 [Figure 1] Figure 1 shows the configuration of a temperature testing apparatus according to one embodiment of the present invention. [Figure 2] Figure 2(a) is a plan view showing the external appearance of the plate-shaped member. Figure 2(b) is a front view showing the external appearance of the plate-shaped member. [Figure 3] Figure 3 is a cross-sectional view along the line III-III in Figure 2(a). [Figure 4] Figure 4 shows the configuration of a conventional temperature testing apparatus. [Figure 5] Figure 5 shows the configuration of a temperature testing apparatus according to a second embodiment of the present invention. [Modes for carrying out the invention] 【0018】 Specific examples of the present invention will be described below with reference to the drawings. In the following description, the same elements in the drawings will be denoted by the same reference numerals, and redundant explanations will be omitted. 【0019】 [First Embodiment] FIG. 1 is a diagram showing the configuration of a temperature test apparatus 1A according to a first embodiment of the present invention. The temperature test apparatus 1A is an apparatus that performs a temperature test on a test object installed in a test chamber 3 by controlling the temperature in the test chamber 3. The upper limit of the temperature control range is, for example, +80°C. The lower limit of the temperature control range is, for example, -30°C. As shown in FIG. 1, the temperature test apparatus 1A of the present embodiment includes a main body 2. The main body 2 includes a test chamber 3 and a blower mechanism. The test chamber 3 is a substantially rectangular parallelepiped space (hollow), and a test object is placed inside it. The test chamber 3 is separated from the external space by a partition wall. The width of the test chamber 3 is, for example, 800 mm, the height is, for example, 600 mm, and the depth is, for example, 600 mm. And the effective temperature control range that satisfies JTM-K07(2007), which is a standard established by the Japan Society for Testing Machines, is, for example, a width of 600 mm, a height of 400 mm, and a depth of 400 mm. 【0020】 The test chamber 3 has an opening 3a. The opening 3a is formed in a part of the partition wall that separates the inside and outside of the test chamber 3, specifically, in the front side part of the partition wall that separates the inside and outside of the test chamber 3 among the partition walls that separate the inside and outside of the test chamber 3. The front side of the test chamber 3 refers to the side where an operator carries in and out a test object from the test chamber 3, that is, the front side of the temperature test apparatus 1A. The opening 3a may be formed over substantially the entire front side part of the test chamber 3. The operator carries in a test object into the test chamber 3 and carries out a test object from the test chamber 3 through the opening 3a. From the upper end of the opening 3a, two layers of curtains 15, 16, which are transparent resin sheets, are hanging down. 【0021】 The blower mechanism forms an air curtain along the opening 3a. The temperature test device 1A of the present embodiment includes a three-layer air curtain, and the blower mechanism forms the first-layer air curtain A1, the second-layer air curtain A2, and the third-layer air curtain A3. To form the first-layer air curtain A1, the blower mechanism has a blower 6 and an air flow path 10. The blower 6 is disposed within the air flow path 10 and moves the air within the air flow path 10. The air flow path 10 has a blowout port 10a located at the upper part (for example, the upper end) of the opening 3a and a suction port 10b located at the lower part (for example, the lower end) of the opening 3a. The air that has moved within the air flow path 10 by the blower 6 flows downward from the blowout port 10a and is then sucked into the suction port 10b. The blower 6 sends air from the suction port 10b to the blowout port 10a. Due to this air flow, the first-layer air curtain A1 is formed. 【0022】 Also, an evaporator, a defrost heater, and a heating heater are disposed inside the air flow path 10. The evaporator cools the air within the air flow path 10 by evaporating the refrigerant. The defrost heater operates periodically to melt the frost and ice adhering to the evaporator 5. The heating heater heats the air within the air flow path 10 by converting the supplied electric power into heat. The temperature of the air flowing out from the blowout port 10a is controlled to approach the set temperature by the evaporator 5 and the heating heater 8. 【0023】 As shown in FIG. 1, at least a part of the air forming the first-layer air curtain A1 flows out from the blowout port 10a and then flows through the internal space of the test tank 3. This air mainly flows toward the back side at the lower part of the test tank 3 and then flows toward the front side at the upper part of the test tank 3. The back side of the test tank 3 refers to the side opposite to the side where the operator carries the test object into and out of the test tank 3, that is, the side close to the back surface of the temperature test device 1A. Then, this air is sucked into the suction port 10b. Due to such movement of the air, the temperature of the air within the test tank 3 approaches the set temperature. 【0024】 To form the second layer air curtain A2, the blowing mechanism includes a blower 9 and an air passage 11. The blower 9 is positioned within the air passage 11 and moves the air within the air passage 11. The air passage 11 has an outlet 11a located at the upper end of the opening 3a and an intake 11b located at the lower end of the opening 3a. The air moved within the air passage 11 by the blower 9 flows downward from the outlet 11a and is then drawn into the intake 11b. This airflow forms the second layer air curtain A2. 【0025】 To form the third layer air curtain A3, the blowing mechanism includes an air passage 12 and a blower 13. The blower 13 sends air into the air passage 12. The air passage 12 has a nozzle 12a located at the upper end of the opening 3a. The air sent from the blower 13 to the air passage 12 flows out downward from the nozzle 12a. This air forms the third layer air curtain A3. 【0026】 The temperature testing apparatus 1A further comprises a plate-shaped member 4A and a table 14. The plate-shaped member 4A is located near the bottom of the test chamber 3, specifically near the bottom surface 32 of the test chamber 3. The plate-shaped member 4A has an upper surface 4a including a mounting surface 4g, and a lower surface 4b facing away from the upper surface 4a. The mounting surface 4g is on which the object to be tested is placed. The plate-shaped member 4A is configured so that the mounting surface 4g can be pulled out of the test chamber 3 through the opening 3a. This makes it easy to place the object to be tested on the mounting surface 4g. The table 14 protrudes outward from the lower end of the opening 3a towards the outside of the temperature testing apparatus 1A. The power supply for the object to be tested, a personal computer, etc., are placed on the table 14. 【0027】 Figure 2(a) is a plan view showing the external appearance of the plate-shaped member 4A. Figure 2(b) is a front view showing the external appearance of the plate-shaped member 4A. As shown in these figures, the plate-shaped member 4A has a flat plate shape, such as a rectangle in its planar shape. Both the upper surface 4a and the lower surface 4b of the plate-shaped member 4A are flat. The mounting surface 4g is located approximately in the center of the upper surface 4a. In addition to the upper surface 4a and the lower surface 4b, the plate-shaped member 4A has a first side surface 4c, a second side surface 4d, a third side surface 4e, and a fourth side surface 4f. The first side surface 4c is the side facing the opening 3a and faces the front. A handle 42 is attached to the center of the first side surface 4c, which is used by workers to grip the plate-shaped member 4A when pulling it out. The second side surface 4d is the side opposite to the opening 3a and faces away from the front. As shown in Figure 1, the second side surface 4d faces the partition wall 31 of the test chamber 3, which is located on the opposite side of the opening 3a from the mounting surface 4g. The third side surface 4e and the fourth side surface 4f are a pair of sides of the temperature test apparatus 1A along the front-rear direction. The third side surface 4e connects one end of the first side surface 4c to one end of the second side surface 4d. The fourth side surface 4f connects the other end of the first side surface 4c to the other end of the second side surface 4d. 【0028】 The interior of the plate-shaped member 4A is hollow, and the plate-shaped member 4A has an internal space. As shown in Figure 2(a), the plate-shaped member 4A has a plurality of air inlets 43 connected to the internal space. The plurality of air inlets 43 are formed in the region of the upper surface 4a closer to the second side surface 4d and are arranged laterally along the second side surface 4d (i.e., in the width direction of the plate-shaped member 4A). In other words, the plurality of air inlets 43 are arranged along the partition wall 31 (see Figure 1) located on the opposite side of the opening 3a from the mounting surface 4g. The center spacing (pitch) P1 between the plurality of air inlets 43 is, for example, 40 mm or more and 60 mm or less, and in one example it is 50 mm. The shape of each air inlet 43 is, for example, circular. The inner diameter of each air inlet 43 is, for example, 5.0 mm or more and 10 mm or less, and in one example it is 5.5 mm. The distance from the second side surface 4d of each air inlet 43 is, for example, 5 mm to 15 mm, and in one example it is 10 mm. 【0029】 As shown in Figure 2(b), the plate-shaped member 4A has a plurality of air outlets 44 connected to the internal space. The plurality of air outlets 44 are formed on the first side surface 4c and are arranged laterally. The shape of each air outlet 44 is, for example, circular. The inner diameter of each air outlet 44 is, for example, 5.0 mm or more and 10 mm or less, and in one example it is 5.5 mm. The inner diameter of each air outlet 44 may be the same as or different from the inner diameter of each air inlet 43. The inner diameter of each air outlet 44 may be larger or smaller than the inner diameter of each air inlet 43. In one embodiment, each air outlet 44 is located at the center of the first side surface 4c in the vertical direction. 【0030】 Some of the multiple air outlets 44 constitute a first air outlet group 44A, and the remaining air outlets 44 constitute a second air outlet group 44B. That is, each of the first air outlet group 44A and the second air outlet group 44B consists of one or more (two in the illustrated example) air outlets 44. In each of the first air outlet group 44A and the second air outlet group 44B, the multiple air outlets 44 are arranged laterally, and the center spacing (pitch) P2 between the multiple air outlets 44 is, for example, 30 mm or more and 50 mm or less, and in one example it is 40 mm. The first air outlet group 44A is located in a region near one end in the later direction on the first side surface 4c of the plate-shaped member 4A. The second air outlet group 44B is located in a region near the other end in the later direction on the first side surface 4c of the plate-shaped member 4A. A wider spacing (pitch) P2 is provided between the first air outlet group 44A and the second air outlet group 44B than the spacing between the centers of the multiple air outlets 44. 【0031】 Figure 3 is a cross-sectional view along line III-III in Figure 2(a). As previously mentioned, the plate-shaped member 4A has an internal space 45. Multiple air inlets 43 and multiple air outlets 44 are connected to the internal space 45. As a result, an air passage 16A is formed in the region including the interior of the plate-shaped member 4A. The air passage 16A includes the internal space 45 of the plate-shaped member 4A, the multiple air inlets 43, a first group of air outlets 44A, and a second group of air outlets 44B. The air passage 16A extends from the region in the test chamber 3 that is opposite to the opening 3a with respect to the mounting surface 4g (i.e., the rear region of the test chamber 3), through below the mounting surface 4g, to the intake port 10b (see Figure 1). Through this air passage 16A, air from the rear of the test chamber 3 is drawn into the intake port 10b (arrow A4 in Figure 1). 【0032】 The effects obtained by the temperature testing apparatus 1A of this embodiment, as described above, will be explained along with the problems of conventional temperature testing apparatuses. Figure 4 is a diagram showing the configuration of a conventional temperature testing apparatus 100. The temperature testing apparatus 100 has the same configuration as the temperature testing apparatus 1A of this embodiment, except that it is equipped with a plate-shaped member 40 instead of a plate-shaped member 4A, and an air passage 16A is not formed in the plate-shaped member 40. The space inside the test chamber 3 needs to have sufficient depth to accommodate various sizes of the object to be tested. Therefore, there is a problem that the air from the outlet 10a of the air curtain A1 located at the opening 3a does not easily reach the back of the test chamber 3. In particular, when the area inside the test chamber 3 is rectangular, the air from the outlet 10a does not easily reach the areas B1 and B2 located at the four corners at the back. Therefore, the temperature at the back of the test chamber, especially the areas B1 and B2 located at the four corners at the back, does not easily change, and it takes a long time for the temperature inside the test chamber 3 to stabilize at the set temperature in every corner. 【0033】 To address the above problem, the temperature testing apparatus 1A of this embodiment is equipped with an air passage 16A separate from the air curtains A1 to A3 formed in the opening 3a. This air passage 16A extends from a region in the test chamber 3 that is on the opposite side of the opening 3a from the mounting surface 4g, i.e., a region located at the back of the test chamber 3, through below the mounting surface 4g, to the intake port 10b. Since the air passage 16A extends to the intake port 10b, the end of the air passage 16A becomes negative pressure due to the airflow force of the blowing mechanism, causing air to flow into the air passage 16A. The air flowing through this air passage 16A is air that has flowed into the air passage 16A from the back of the test chamber 3. As a result, the back of the test chamber 3 becomes negative pressure, making it easier for the air flowing out from the outlet port 10a to flow to the back of the test chamber 3. Thus, according to the temperature testing apparatus 1A of this embodiment, regardless of the presence of the object to be tested, the air flowing out from the outlet port 10a can easily reach the back of the test chamber 3. Therefore, the time required for the temperature inside the test chamber 3 to stabilize at the set temperature can be shortened, and the effective temperature range inside the test chamber 3 can be widened. Furthermore, with the temperature testing device 1A of this embodiment, these effects can be obtained with an extremely simple configuration, such as providing an air passage 16A that passes below the mounting surface 4g, without adding any special air conditioning equipment. 【0034】 The inventors measured the time required for the temperature inside the test chamber 3 to stabilize at the set temperature in both the temperature testing apparatus 1A of this embodiment and the conventional temperature testing apparatus 100. Three types of operating conditions were used: heating from 25°C to the set temperature of 80°C, cooling from 25°C to the set temperature of -25°C, and cooling from 25°C to the set temperature of -30°C. Table 1 below shows the time required for each operating condition. As shown in this table, under all operating conditions, the temperature testing apparatus 1A of this embodiment can shorten the time required for the temperature inside the test chamber 3 to stabilize at the set temperature compared to the conventional temperature testing apparatus 100. [Table 1] 【0035】 As in this embodiment, the mounting surface 4g is included in the upper surface 4a of the plate-shaped member 4A provided in the test chamber 3, and the air passage 16A may be formed in a region including the internal space 45 of the plate-shaped member 4A. In this case, since the plate-shaped member 4A constituting the mounting surface 4g also serves as the air passage 16A, a structure including the air passage 16A can be easily realized. 【0036】 As in this embodiment, the air passage 16A may include an internal space 45 of the plate-shaped member 4A, an air inlet 43 formed on the upper surface 4a of the plate-shaped member 4A and connected to the internal space 45, and an air outlet 44 formed on the first side surface 4c of the plate-shaped member 4A on the opening 3a side and connected to the internal space 45. In this case, the air passage 16A can be easily formed from the area at the back of the test tank 3, passing below the mounting surface 4g and reaching the suction port 10b. 【0037】 As in this embodiment, the air passage 16A includes a plurality of air inlets 43, and the plurality of air inlets 43 may be arranged along a partition wall 31 located on the opposite side of the opening 3a from the mounting surface 4g. In this case, the amount of air flowing into the air passage 16A can be made more uniform along the partition wall 31 at the back of the test chamber 3. Therefore, the air flowing out from the outlet 10a can be more easily distributed uniformly at the back of the test chamber 3, and the time it takes for the temperature inside the test chamber 3 to stabilize at the set temperature can be further shortened. 【0038】 As in this embodiment, the air passage 16A includes a first air outlet group 44A and a second air outlet group 44B. The first air outlet group 44A is located in a region near one end in the width direction on the first side surface 4c of the plate-shaped member 4A, and the second air outlet group 44B may be located in a region near the other end in the width direction on the first side surface 4c of the plate-shaped member 4A. In this case, compared to the case where the air outlet 44 is formed near the center of the first side surface 4c, forming the air outlet 44 near the edge of the first side surface 4c makes it easier to process the air outlet 44, and reduces the risk of the liquid entering the internal space 45 from the air outlet 44 even if liquid spills from a container placed on the top surface 4a. In addition, since the air outlet 44 is not provided near the center of the first side surface 4c on the opening 3a side of the plate-shaped member 4A, it does not prevent the installation of a handle 42 for pulling out the plate-shaped member 4A near the center of the first side surface 4c. 【0039】 As in this embodiment, the inner diameters of the air inlet 43 and air outlet 44 may be 10 mm or less. By reducing the inner diameters of the air inlet 43 and air outlet 44 in this way, the flow velocity at both the air inlet 43 and air outlet 44 can be increased. As a result, the flow velocity of the air flowing at the back of the test chamber 3 (arrow A4 in Figure 1) also increases, further shortening the time it takes for the temperature inside the test chamber 3 to stabilize at the set temperature. 【0040】 [Second Embodiment] Figure 5 shows the configuration of a temperature testing apparatus 1B according to a second embodiment of the present invention. The temperature testing apparatus 1B includes a plate-shaped member 4B in place of the plate-shaped member 4A of the first embodiment. The other configurations of the temperature testing apparatus 1B are the same as those of the temperature testing apparatus 1A of the first embodiment. The plate-shaped member 4B is configured to allow the mounting surface 4g to be pulled out of the test chamber 3 through the opening 3a, similar to the plate-shaped member 4A. 【0041】 The configuration of the plate-shaped member 4B is the same as that of the plate-shaped member 4A in the first embodiment, except for the matters described below. Unlike the plate-shaped member 4A in the first embodiment, the plate-shaped member 4B does not have either an air inlet 43 or an air outlet 44. That is, the temperature test apparatus 1B of this embodiment does not have an air passage formed in the region including the internal space of the plate-shaped member 4B. Instead, the temperature test apparatus 1B has an air passage 16B. The air passage 16B runs from the region in the test chamber 3 that is on the opposite side of the opening 3a from the mounting surface 4g (i.e., the rear region of the test chamber 3), through below the mounting surface 4g, to the intake port 10b. Through this air passage 16B, air from the rear of the test chamber 3 is drawn into the intake port 10b (arrow A4 in Figure 1). 【0042】 The air passage 16B in this embodiment includes a first gap 21, which is the gap between the second side surface 4d of the plate-shaped member 4B and the partition wall 31 of the test chamber 3, and a second gap 22, which is the gap between the lower surface 4b of the plate-shaped member 4B and the bottom surface 32 of the test chamber 3. Therefore, air from the back of the test chamber 3 reaches the intake port 10b through the first gap 21 and the second gap 22. To form the first gap 21, the temperature testing apparatus 1B further includes a mechanism provided in the test chamber 3 to restrict the movement of the plate-shaped member 4B. The mechanism to restrict movement forms the first gap 21 between the second side surface 4d and the partition wall 31 by, for example, causing the second side surface 4d of the plate-shaped member 4B to abut against the second side surface 4d (or another part of the plate-shaped member 4B) before it reaches the partition wall 31. 【0043】 As in this embodiment, the air passage 16B may include a first gap 21 between the second side surface 4d of the plate-shaped member 4B and the partition wall 31 of the test tank 3, and a second gap 22 between the lower surface 4b of the plate-shaped member 4B and the bottom surface 32 of the test tank 3. In this case as well, the air passage 16B can be formed by the plate-shaped member 4B that constitutes the mounting surface 4g, so a structure including the air passage 16B can be easily realized. 【0044】 As in this embodiment, the temperature testing apparatus 1B may include a mechanism that forms the first gap 21 by restricting the movement of the plate-shaped member 4B. With this temperature testing apparatus 1B, a structure including an air passage 16B can be easily realized when the plate-shaped member 4B can be pulled out of the test chamber 3. 【0045】 The temperature testing apparatus according to the present invention is not limited to the embodiments described above, and various other modifications are possible. For example, the embodiments described above may be combined with each other according to the required purpose and effect. Furthermore, the air passage is not limited to the embodiments described above, and is not limited to any particular path from the area at the back of the test chamber 3 through below the mounting surface 4g to the intake port 10b. Also, in the first embodiment, the number and position of the air inlet 43 and air outlet 44 formed on the plate-shaped member 4A are not limited to the example described above. [Explanation of symbols] 【0046】 1A, 1B...Temperature testing apparatus, 2...Main body, 3...Test chamber, 3a...Opening, 4A, 4B...Plate-shaped member, 4a...Top surface, 4b...Bottom surface, 4c...First side, 4d...Second side, 4e...Third side, 4f...Fourth side, 4g...Placement surface, 5...Evaporator, 6, 9, 13...Blower, 7...Defrost heater, 8...Heating heater, 10, 11, 12, 16A, 16B...Air passage, 10a, 11a, 12a...Blow Outlet, 10b, 11b... Inlet, 14... Table, 15, 16... Curtain, 21... First gap, 22... Second gap, 31... Partition wall, 32... Bottom surface, 42... Handle, 43... Air inlet, 44... Air outlet, 44A... First air outlet group, 44B... Second air outlet group, 45... Internal space, 100... Temperature testing device, A1~A3... Air curtain, B1, B2... Area, P1, P2... Pitch.

Claims

[Claim 1] A device for performing a temperature test on an object to be tested by controlling the temperature inside the test chamber, An opening is provided in a part of the partition wall separating the outside of the test chamber from the inside of the test chamber, for bringing the object to be tested into the test chamber and for removing the object to be tested from the test chamber, A blowing mechanism having an air outlet provided at the top of the opening, an air intake provided at the bottom of the opening, and a blower that sends air from the intake to the outlet, forming an air curtain along the opening, A mounting surface is provided within the test chamber on which the object to be tested is placed, Within the test chamber, an air passage is provided, extending from a region located on the opposite side of the opening from the aforementioned surface, through the area below the aforementioned surface, to the intake port. A temperature testing apparatus equipped with the following features. [Claim 2] The aforementioned mounting surface is included in the upper surface of the plate-shaped member provided in the test chamber, The temperature testing apparatus according to claim 1, wherein the air passage is formed in a region including the interior of the plate-shaped member. [Claim 3] The aforementioned air passage is The internal space of the plate-shaped member, An air inlet is formed on the upper surface of the plate-shaped member and connects to the internal space, An air outlet is formed on the first side surface of the plate-shaped member on the opening side, and is connected to the internal space. A temperature testing apparatus according to claim 2, including the following: [Claim 4] The air passage includes a plurality of air inlets, The temperature testing apparatus according to claim 3, wherein the plurality of air inlets are arranged along the portion of the partition wall located on the opposite side of the opening from the mounting surface described above. [Claim 5] The aforementioned air passage is A first group of air outlets consisting of one or more of the aforementioned air outlets, A second group of air outlets consisting of one or more of the aforementioned air outlets, Includes, The first group of air outlets is located in a region near one end in the width direction on the first side surface of the plate-shaped member. The temperature testing apparatus according to claim 3, wherein the second group of air outlets is located in a region on the first side surface of the plate-shaped member near the other end in the width direction. [Claim 6] The temperature testing apparatus according to any one of claims 3 to 5, wherein the inner diameters of the air inlet and the air outlet are 10 mm or less. [Claim 7] The aforementioned mounting surface is included in the upper surface of the plate-shaped member provided in the test chamber, The temperature testing apparatus according to claim 1, wherein the air passage includes a first gap between the second side surface of the plate-shaped member opposite to the opening side and the partition wall of the test tank, and a second gap between the lower surface of the plate-shaped member and the bottom surface of the test tank. [Claim 8] The plate-shaped member is configured such that the surface described above can be pulled out of the test tank through the opening, The temperature testing apparatus according to claim 7, further comprising a mechanism provided in the test chamber that restricts the movement of the plate-shaped member to form the first gap.

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