Article inspection apparatus and x-ray inspection apparatus

Abstract

To downsize an X-ray inspection apparatus having a plurality of heat radiating components without complicating an internal structure while securing necessary cooling performance.SOLUTION: An X-ray inspection apparatus 1 includes an X-ray generator 4, an X-ray detector 5, and a control board 30 inside a housing 2. The control board 30 is housed in a cooling box 10a provided inside the housing. A cooling medium is flowed through flow passages 15 embedded in walls 13 of the cooling box by a cooling medium supply system 20. The entire interior of the cooling box is held at a constant temperature lower than the exterior of the cooling box. The heat generated from the heat radiating components in the cooling box is discharged to the outside of the apparatus by the cooling medium, and is radiated from the cooling box to the outside air through the air in the housing. An arrangement space of the heat radiating components is reduced and the apparatus can be downsized.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an article inspection device having multiple heat-generating components inside a housing, or an X-ray inspection device having multiple heat-generating components including an X-ray generator and an X-ray detector inside a housing, and in particular to an article inspection device or X-ray inspection device that can make the housing compact while ensuring the necessary cooling performance. [Background technology]

[0002] Patent Document 1 below discloses an invention of an X-ray inspection apparatus. The X-ray inspection apparatus 1 according to this invention includes a housing 4 separated into a first chamber R1 and a second chamber R2, an X-ray generator 2 and a first control unit 9 as heat-generating components in the first chamber, an X-ray detector 3 and a second control unit 11 as heat-generating components in the second chamber, and a cooler 12 disposed outside the rear side of the housing. Cool air from the cooler 12 is supplied to the first chamber R1 via an external cool air guide path 20 outside the housing and to the second chamber via an internal cool air guide path 21, cooling the X-ray generator 2 and the first control unit 9, and the X-ray detector 3 and the second control unit 11, respectively. Warm air from the first chamber returns to the cooler inlet 14 via a warm air guide path 30 outside the housing. According to this invention, efficient cooling can be achieved by directing cool air from the cooler to multiple heat sources. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-158264 Summary of the Invention [Problem to be solved by the invention]

[0004] X-ray inspection equipment contains, inside the housing, not only the X-ray generator and X-ray detector, which are heat-generating components, but also multiple control boards equipped with electronic components that are heat sources. When the X-ray detector is in use, these control boards generate heat, causing localized temperature increases inside the housing, which causes a problem of shortening the lifespan of the various electronic components and devices, including the control boards.

[0005] Therefore, in the X-ray inspection device described in the above Patent Document 1, multiple control boards, i.e., the first control unit 9 and the second control unit 11, are distributed and arranged in different positions within the housing, and cool air from the cooler 12 is sent to each control board to cool it, and housing heat dissipation is also used in combination to conduct heat from each control board to the housing and dissipate it from the outer surface of the housing to the outside world, thereby adopting thermal countermeasures to level out and reduce the temperature inside the housing.

[0006] In the field of X-ray inspection equipment, users are increasingly demanding improved performance and more diverse functions. To meet these demands, it is conceivable to mount more sophisticated electronic components on the control boards inside the housing, or to increase the number of control boards. However, this inevitably increases the amount of heat generated by the control boards. In addition to improved performance, users are also demanding a more compact system.

[0007] However, distributing the control boards at appropriate distances within the housing to avoid localized heat concentration within the housing not only requires a structurally difficult design, but also goes against the demand for compact housings. Furthermore, given that the amount of heat generated by the control boards increases, it is difficult to equalize and reduce the temperature inside the housing by simply distributing the control boards, which are heat-generating components, within the housing and cooling them through housing heat dissipation.

[0008] As described above, conventional X-ray inspection equipment has a problem in that it is difficult to downsize the housing while ensuring the cooling performance required for high-performance X-ray inspection equipment using conventional heat countermeasures that use air conditioners and housing heat dissipation.

[0009] The present invention has been made in consideration of the problems with the conventional technology described above, and aims to provide an article inspection device or X-ray inspection device having a compact housing, which has multiple heat-generating components inside a housing, or an X-ray inspection device having multiple heat-generating components including an X-ray generator and an X-ray detector inside a housing, and which can ensure the necessary cooling performance even when the amount of heat generated increases as performance improves. [Means for solving the problem]

[0010] The article inspection device 1 described in claim 1 comprises: An article inspection device (1) having a plurality of heat-generating components (30) inside a housing (2), cooling boxes 10a and 10b provided inside the housing 2 and accommodating at least a portion of the heat-generating component 30; a cooling medium flow passage 15 provided in a wall portion 13 of the cooling boxes 10a and 10b to maintain the temperature inside the cooling boxes 10a and 10b lower than the temperature outside; The present invention is characterized by the following:

[0011] The article inspection device according to claim 2 is the article inspection device 1 according to claim 1, The cooling system is characterized by having a circulation system 40 for circulating a cooling medium through the flow passage 15.

[0012] The article inspection device according to claim 3 is the article inspection device 1 according to claim 1, The cooling boxes 10a and 10b are made of metal, and the flow passages 15 are embedded inside the wall portions 13 of the cooling boxes 10a and 10b.

[0013] The article inspection device according to claim 4 is the article inspection device 1 according to claim 1, The cooling box 10b is characterized by being provided with a fan 50 for circulating the air inside the cooling box 10b.

[0014] The X-ray inspection apparatus 1 according to claim 5 comprises: An X-ray inspection device (1) having a first heat-generating component including an X-ray generator (4) and an X-ray detector (5) and a second heat-generating component (30) inside a housing (2), the X-ray inspection device (1) inspecting an object by detecting, with the X-ray detector (5), X-rays that are irradiated from the X-ray generator (4) and transmitted through the object, cooling boxes 10a and 10b provided inside the housing 2 and accommodating at least a portion of the second heat-generating component 30; a cooling medium flow passage 15 provided in a wall portion 13 of the cooling boxes 10a and 10b to maintain the temperature inside the cooling boxes 10a and 10b lower than the temperature outside; The present invention is characterized by the following: [Effects of the Invention]

[0015] According to the article inspection device of claim 1, a cooling medium is circulated through a circulation path provided in the wall of the cooling box, so the wall of the cooling box is subjected to a stable cooling effect, and the entire space inside the cooling box is maintained at a constant temperature lower than that outside the cooling box. Therefore, heat generated from a heat-generating component stored inside the cooling box is conducted to the cooling medium via the wall of the cooling box and the circulation path, and is discharged to the outside of the article inspection device by the circulating cooling medium, and is also conducted from the cooling box through the air inside the housing to the outside air and discharged to the outside of the device.

[0016] Furthermore, even if the heat-generating components housed inside the cooling box have different heat generation values, by appropriately positioning them inside the cooling box, it is possible to provide the necessary cooling in a temperature environment maintained at a constant low temperature. That is, when multiple heat-generating components with different heat generation values ​​or allowable temperature limits are housed in the cooling box, heat-generating components with a large heat generation value or a low allowable temperature limit, and heat-sensitive components are preferentially placed close to the wall of the cooling box. Heat-generating components with a relatively small heat generation value or a high allowable temperature limit, and heat-resistant components are placed farther from the wall of the cooling box. In this way, it is possible to effectively utilize the space inside the cooling box where the heat-generating components are housed, while efficiently providing the necessary and sufficient cooling effect to all of the different types of heat-generating components.

[0017] Furthermore, while multiple heat-generating components were previously placed separately in different locations within the housing and attached to the housing with separate mounting structures, this new structure houses them all in a common cooling box for collective cooling. This has the following advantages: first, it reduces the space required for arranging the heat-generating components within the housing, making the housing more compact and enabling the product inspection device to be made smaller; second, because they are housed in a common cooling box, the number of components can be reduced by standardizing the mounting structure; and third, maintenance of the heat-generating components can be performed simply by accessing the cooling box, making maintenance easier and improving maintainability.

[0018] According to the article inspection device of claim 2, by circulating the cooling medium through the flow path by the circulation system, it is possible to stably maintain the entire interior space of the cooling box at a constant low temperature, and therefore, even if multiple heat-generating components with different heat values ​​or allowable temperatures are stored in the cooling box, it is possible to stably and efficiently provide the necessary and sufficient cooling to all of the heat-generating components. In particular, by controlling the temperature and flow rate of the cooling medium with the circulation system, cooling is concentrated only within the cooling box where the heat-generating components are concentrated, so that the heat-generating components can be cooled efficiently and energy can be saved.

[0019] According to the item inspection device described in claim 3, since the circulation path is embedded in the wall of the metal cooling box, there is good thermal conduction between the circulating cooling medium, the flow path, and the cooling box, and the inside of the cooling box can be efficiently and quickly set to any desired low temperature.

[0020] According to the article inspection device of claim 4, the low temperature inside the cooling box can be uniformed reliably and quickly by circulating the air inside the cooling box with a fan.

[0021] The X-ray inspection apparatus described in claim 5 is an inspection apparatus that inspects an object by detecting X-rays that have passed through the object. Therefore, the X-ray generator and the X-ray detector must be located on both sides of the object to be inspected and cannot be located in the same position. Therefore, they are left in separate locations within the housing, and the other second heat-generating components are collected and cooled in a common cooling box. Therefore, this X-ray inspection apparatus achieves the same effect as the object inspection apparatus described in claim 1, in which the heat-generating components stored in the cooling box are second heat-generating components other than the X-ray generator and the X-ray detector. In particular, with this X-ray inspection apparatus, the first heat-generating components, the X-ray generator and the X-ray detector, cannot be cooled in the cooling box due to their placement. However, the second heat-generating components can be collected inside the cooling box and cooled uniformly and efficiently. Therefore, by providing an appropriate cooling means for the first heat-generating components, such as by introducing outside air into the housing or installing an air conditioner, a sufficient cooling effect can be achieved as an X-ray inspection apparatus. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a right side view schematically showing an outline of the internal structure of an X-ray inspection apparatus according to a first embodiment and a second embodiment. [Figure 2] FIG. 2 is a left side view of a cooling box provided in the X-ray inspection apparatus according to the first embodiment. [Figure 3] FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] FIG. 10 is a left side view of a cooling box provided in the X-ray inspection apparatus according to the second embodiment. [Figure 5] FIG. 5 is a cross-sectional view taken along line BB in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0023] An X-ray inspection apparatus 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, an X-ray inspection device 1, which is an object inspection device that uses X-rays, has a housing 2 with an X-ray shielding structure. The housing 2 is composed of a relatively large upper housing 2a, a relatively small lower housing 2b, and an intermediate housing 2c that vertically connects the upper housing 2a and the lower housing 2b at the rear side. The area surrounded by the upper housing 2a, the intermediate housing 2c, and the lower housing 2b is an inspection space S for an object W to be inspected. A transport means 3 for transporting the object W is provided in the inspection space S so as to penetrate the inspection space S in the horizontal direction (the direction perpendicular to the plane of the paper in FIG. 1). The front side of the inspection space S (the left side in FIG. 1) is open, and a door 6 with a shielding structure is attached thereto so as to be able to open and close. An X-ray generator 4 is provided inside the upper housing 2a as a heat-generating component that irradiates X-rays downward. An X-ray detector 5 is provided inside the lower housing 2b as a heat-generating component that detects X-rays that have passed through the object W. The housing 2 having the above configuration is placed on a mounting surface by support legs 7.

[0024] The X-ray generator 4 and the X-ray detector 5 are collectively referred to as the first heat-generating component. In addition to the first heat-generating component, the X-ray inspection apparatus 1 also has a plurality of control boards provided in a cooling box (described later) as components that perform various controls required to operate the first heat-generating component and perform X-ray inspection. Heat-generating components other than the first heat-generating component, such as the control boards, are referred to as the second heat-generating component.

[0025] According to this X-ray inspection device 1, as shown in Fig. 1, an X-ray generator 4 irradiates X-rays onto the object W while the object W is being transported by a transport means 3 within an inspection space S, and an X-ray detector 5 detects the X-rays that have passed through the object W. Then, based on an X-ray image obtained from the output signal of the X-ray detector 5, it is possible to inspect the object W to determine whether it contains any foreign matter or not.

[0026] As shown in Fig. 1, a cooling box 10a is provided inside the back side of the intermediate housing 2c of the X-ray inspection apparatus 1. Fig. 2 and Fig. 3 are views of the cooling box 10a, and Fig. 2 is an enlarged view of the cooling box 10a shown in Fig. 1, which is a right side view, seen from the left side on the opposite side, showing the internal structure. Fig. 3 is a cross-sectional view taken along the AA cutting line in Fig. 2, and particularly shows the inside of the box part of the cooling box 10a.

[0027] 2 and 3, cooling box 10a is composed of a substantially cubic box body 11 having a square opening across the entire top surface, and a substantially square lid 12 that covers the opening of box body 11. Box body 11 of cooling box 10a is composed of four square side wall portions 13 and one bottom wall portion 14. Box body 11 is a metal casting having a predetermined thickness, and as a specific example, it can be composed of an aluminum casting with each wall portion 13, 14 having a thickness of about 14 mm.

[0028] As shown in FIGS. 2 and 3 , a cooling medium flow passage 15 is embedded in each of a pair of parallel side walls 13, 13 of the box body 11, which are arranged facing each other perpendicularly to the rear surface of the intermediate housing 2c. That is, two flow passages 15 are provided, but a separate flow path may be provided to connect the two systems into one system. The flow passages 15 are metal conduits, and as a specific example, they may be made of aluminum or copper pipes with an inner diameter of 6 mm. The flow passages 15 are bent and arranged within the metal thickness of the side walls 13, thereby enabling the entire side walls 13 to be uniformly cooled. A specific arrangement pattern of the flow passages 15 will be described, starting from the upstream side where the cooling medium is supplied. First, the flow passage 15 enters the side wall portion 13 from the upper part of the rear side of the box body 11 (right side in Figure 1, left side in Figure 2, upper side in Figure 3), extends horizontally, and extends in the opposite direction through the first fold portion 15a on the front side of the box body 11 (left side in Figure 1, right side in Figure 2, lower side in Figure 3), protrudes outside the side wall portion 13 on the rear side of the box body 11, then extends in the opposite direction through the second fold portion 15b, enters again within the metal thickness of the side wall portion 13, extends in the opposite direction through the third fold portion 15c on the front side of the box body 11, and protrudes outside the side wall portion 13 from the lower part of the rear side of the box body 11.

[0029] On the rear side of the box body 11 (the left side in FIG. 2, the upper side in FIG. 3), the portion that is connected to the upper part of the box body 11 is an inlet 16 of the flow path 15, and the portion that is connected to the lower part of the box body 11 is an outlet 17 of the flow path 15. As shown in FIG. 1, the inlet 16 and the outlet 17 pass through the rear side of the intermediate housing 2c and are led out to the outside. As mentioned above, there are two systems of flow paths 15, and the flow paths 15 are respectively provided inside the pair of side wall portions 13, so in FIG. 3 the inlets 16, 16 of the flow paths 15, 15 of the two systems are shown.

[0030] In this way, the flow passage 15 protruding from the box body 11 is hardly exposed inside the housing 2, but passes through the back of the intermediate housing 2c and is led out to the outside of the device 1a, so that the temperature of the cooling medium on the inflow side does not rise due to the heat inside the housing 2, and the heat of the cooling medium on the outflow side does not conduct to the air inside the housing 2 and raise the temperature inside the housing 2.

[0031] As shown in FIG. 2, the inlet 16 and outlet 17 of the flow path 15 are connected to a refrigerant supply system 20. The refrigerant supply system 20 does not itself have a heat exchange function; it supplies a cooling medium prepared at the required temperature to the cooling box 10a and recovers used cooling medium whose temperature has risen. The cooling medium can be a gas such as air cooled to a sufficiently low temperature or a liquid such as water. For example, the refrigerant supply system 20 can be composed of an existing cooling water supply means in a factory, a means for applying the required pressure to the cooling water supplied from the cooling water supply means and supplying it to the inlet 16 of the flow path 15, and a means for recovering the water whose temperature has risen and flowed out from the outlet 17 of the flow path 15 and returning it to the cooling water supply means.

[0032] According to the refrigerant supply system 20 and cooling box 10a of the X-ray inspection apparatus 1 of this embodiment, the flow path 15 is embedded in the side wall 13 of the metal cooling box 10a. This provides good thermal conduction between the circulating cooling medium, the flow path 15, and the cooling box 10a, allowing efficient and rapid cooling of the interior of the cooling box 10a. Therefore, the pair of side wall 13, 13, in which the flow path 15 is provided, and the interior space of the cooling box 10a sandwiched therebetween, receive stable cooling, maintaining the entire interior space of the cooling box 10a at a constant temperature lower than the temperature outside the cooling box 10a within the housing. For example, if the temperature near the X-ray generator 2 within the housing 2 is approximately 50°C and the temperature near the X-ray detector 5 is approximately 45°C during operation of the X-ray inspection apparatus 1, it is preferable to maintain the interior of the cooling box 10a at a constant temperature between 25°C and 50°C by appropriately setting the temperature and flow rate of the cooling medium supplied to and collected from the cooling box 10a by the refrigerant supply system 20.

[0033] 2 is disposed outside the box body 11 as described above, but is not shown in FIG. 1 because it is hidden inside the housing 2. If possible, like the first and third folded portions 15a and 15c, this second folded portion 15b is preferably embedded inside the side wall portion 13 without being exposed to the outside of the box body 11. However, in order to stably position the entire flow path 15 in the mold when casting the box body 11, second folded portion 15b needs to be positioned outside the mold and stably supported outside the mold during the casting process, which is why it has the configuration shown in FIG.

[0034] As shown in Figures 2 and 3, a plurality of control boards 30, which are the second heat-generating components described above, are provided inside the cooling box 10a. As shown schematically in Figures 2 and 3, a plurality of electronic components 31 are mounted on the control board 30, and each electronic component 31 serves as a heat source. The amount of heat emitted by each control board 30 during use is not necessarily the same, and generally differs depending on the type of control board 30. When a plurality of control boards 30 with different heat values ​​are stored inside the cooling box 10a, the position of each control board 30 inside the cooling box 10a can be appropriately set so that each control board 30 receives cooling appropriate to its heat value.

[0035] 3, in the case of control board 30a, which generates a large amount of heat or has a low allowable temperature and is therefore vulnerable to heat, contact with side wall 13 may result in excessive cooling, particularly when the number of control boards 30 in cooling box 10a is small, so the required cooling effect can be obtained by arranging control board 30a in a vertical position parallel to the inner surface of side wall 13 where circulation path 15 is provided, and close to the inner surface. Also, in the case of control board 30b, which generates a relatively small amount of heat or has a high allowable temperature and is therefore resistant to heat, the interior of cooling box 10a is maintained at a uniform, constant temperature, so the required cooling effect can be obtained by arranging control board 30b in a vertical position parallel to the other control boards 30a, 30a, away from the inner surface of side wall 13 (for example, in the center of cooling box 10a).

[0036] As shown in FIG. 3, by arranging multiple control boards 30 (30a, 30b, 30a) in parallel with each other inside the cooling box 10a, it is possible to effectively utilize the space inside the cooling box 10a in which the control boards 30 are arranged, while efficiently providing the necessary and sufficient cooling effect to all of the control boards 30. Note that the three control boards 30 (30a, 30b, 30a) shown in FIG. 3 are an example, and the number of control boards 30 may be two or less, or four or more. Note that in special circumstances, such as when there are a large number of control boards 30 to be cooled, it is not excluded to arrange some of the control boards 30 that generate a large amount of heat in contact with the side wall portion 13.

[0037] The size and shape of cooling box 10a can be determined depending on the size and number of control boards 30 to be stored. In addition, the arrangement of control boards 30 within cooling box 10a can be determined arbitrarily depending on the size and shape of control boards 30, the heat generation amount described above, and the like, rather than just arranging them parallel to one another at a predetermined interval as shown in Fig. 3. Furthermore, the second heat-generating component stored within cooling box 10a is not limited to control board 30, and any heat-generating component other than the first heat-generating component that has restrictions on its installation position within housing 2 can be stored within cooling box 10a.

[0038] According to the X-ray inspection apparatus 1 of this embodiment, heat emitted from the control board 30 stored inside the cooling box 10a is conducted to the cooling medium through the walls 13, 14 and the circulation path 15 of the cooling box 10a, and is discharged outside the X-ray inspection apparatus 1 by the circulating cooling medium. It is also conducted from the cooling box 10a to the air inside the housing 2, and is further conducted from the housing 2 to the outside air and dissipated outside the X-ray inspection apparatus 1.

[0039] According to the X-ray inspection apparatus 1 of this embodiment, multiple control boards 30 (30a, 30b, 30a), which were conventionally mounted in different positions in the housing 2 with different structures, are now concentrated in a common cooling box 10a, thereby providing the following effects in addition to the cooling effect described above. First, the space required for arranging the control boards 30 in the housing 2 is reduced, making the housing more compact and reducing the size of the X-ray inspection apparatus 1. Second, because the control boards 30 are housed in the common cooling box 10a, the number of parts can be reduced by standardizing the mounting structure (not shown in FIGS. 2 and 3). Third, when servicing the control board 30, all that is required is to open the back side of the housing 2 and remove the lid 12 to access the cooling box 10a, which makes maintenance easier and improves maintainability.

[0040] Furthermore, even if the X-ray generator 3 and the X-ray detector 4 generate a considerable amount of heat, the multiple control boards 30 (30a, 30b, 30a), which can be freely positioned, are collected and cooled in the cooling box 10a, so by simply providing a cooling means that is not excessive for the X-ray generator 3 and the X-ray detector 4, such as providing a ventilation means for natural or forced ventilation in the compact housing 2 or providing a relatively low-output air conditioner, a sufficient cooling effect can be obtained for the X-ray inspection device 1.

[0041] An X-ray inspection apparatus according to the second embodiment will be described with reference to Figures 4 and 5. To avoid repetition of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals in Figures 4 and 5 as those in the first embodiment, and the explanation of the first embodiment will be used.

[0042] FIG. 4 is a view corresponding to FIG. 2 of the first embodiment, and is a left side view of the cooling box 10b of the X-ray inspection device of the second embodiment. FIG. 5 is a vertical cross-sectional view taken along the line BB in FIG. 4, and particularly shows the internal structure of the box portion 11 and the lid portion 12 of the cooling box 10b, and arrows indicating the direction of air flow.

[0043] 4, the inlet 16 and the outlet 17 of the flow passage 15 are connected to a refrigerant circulation system 40. The refrigerant circulation system 40 itself has a heat exchange function and a refrigerant circulating function. That is, the refrigerant circulation system 40 supplies the required low-temperature cooling medium to the cooling box 10b, converts the high-temperature cooling medium discharged from the cooling box 10b into a low-temperature cooling medium by a heat exchanger, and circulates the low-temperature cooling medium back into the cooling box 10b.

[0044] 1, the second embodiment will be described. In FIG. 1, the inlet 16 and the outlet 17 of the flow passage 15 do not protrude outside the housing 2, and it can be considered that the cooling box 10b of the second embodiment, including the refrigerant circulation system 40, is provided on the rear side (right side in FIG. 1) of the area showing the cooling box 10a of the first embodiment. The other configurations of the X-ray inspection apparatus 1a are common to the first and second embodiments.

[0045] 4 and 5, the cooling box 10b is composed of a substantially cubic box body 11 and a substantially square lid body 12 that covers the opening of the box body 11, as in the first embodiment, but as shown in Fig. 5, a fan 50 that circulates air inside the cooling box 10b is provided inside the lid body 12. The fan 50 is attached to the center of the lid body 12 facing downward, and can blow air toward the center of the bottom wall portion 14 of the box body 11.

[0046] As shown in Figures 4 and 5, three control boards 30c, 30d, and 30c are provided inside the cooling box 10b as second heat-generating components, similar to the first embodiment. The three control boards 30c are arranged in a vertical position parallel to a pair of opposing side walls 13, 13, and are arranged so that the distance between the two outer control boards 30c, 30c and the nearest side walls 13 is approximately the same as the distance between the control boards 30c, 30d, and 30c themselves. Of the three control boards 30c, 30d, and 30c, the central control board 30d has a relatively large vertical dimension, so the gap between it and the bottom wall 14 is relatively small, but the two control boards 30c, 30c on both sides have relatively small vertical dimensions, so the gap between them and the bottom wall 14 is relatively large.

[0047] As shown in Figure 5, the air blown out from the outlet by the fan 50 into the box body 11 passes downward through the two gaps between the control board 30c and the control board 30d, hits the bottom wall portion 14, passes upward through the two gaps between the two control boards 30c, 30c on both sides and the two side wall portions 13, 13, returns to the inside of the lid body 12, and circulates repeatedly within the cooling box 10b by following the path in which it is sucked in from the intake port of the fan 50.

[0048] According to this X-ray inspection device, the cooling medium is circulated through the flow path 15 by the refrigerant circulation system 40, and the air inside the cooling box 10b is circulated by the fan 50, so the effect of maintaining the entire internal space of the cooling box 10b at a constant low temperature can be obtained more stably than in the first embodiment, the temperature inside the cooling box 10b can be made uniform more reliably and quickly, and energy-saving performance is also higher than in the first embodiment.

[0049] In the two embodiments described above, the cooling medium flow passage 15 is embedded within the thickness of the cast metal, but it may also be integrated with the inner surface of the side wall portion 13 by welding or the like, or the flow passage 15 may simply be in contact with the inner surface of the side wall portion 13. [Explanation of symbols]

[0050] 1. X-ray inspection equipment as an item inspection device 2. Housing 4...X-ray generator as the first heat-generating component 5...X-ray detector as the first heat generating component 10a,10b…Cooling box 13...Side wall as wall 15... Distribution path 20...Refrigerant supply system 30, 30a, 30b, 30c, 30d...Control board as second heat generating component 40...Refrigerant circulation system 50...Fan

Claims

1. An article inspection device (1) having a plurality of heat-generating components (30) inside a housing (2), a cooling box (10a, 10b) provided inside the housing and accommodating at least a part of the heat-generating component; a cooling medium flow passage (15) provided in a wall portion (13) of the cooling box to maintain the temperature inside the cooling box lower than the temperature outside; An article inspection device (1) comprising:

2. 2. The article inspection device (1) according to claim 1, further comprising a circulation system (40) for circulating a cooling medium through the flow passage (15).

3. The object inspection device (1) according to claim 1, characterized in that the cooling boxes (10a, 10b) are made of metal, and the flow passage (15) is embedded inside the wall portion (13) of the cooling box.

4. 2. The article inspection device (1) according to claim 1, further comprising a fan (50) for circulating air inside the cooling box (10b).

5. An X-ray inspection device (1) having a first heat-generating component including an X-ray generator (4) and an X-ray detector (5) and a second heat-generating component (30) inside a housing (2), the X-ray inspection device inspecting an object by detecting X-rays emitted from the X-ray generator and transmitted through the object with the X-ray detector, a cooling box (10a, 10b) provided inside the housing and accommodating at least a portion of the second heat-generating component; a cooling medium flow passage (15) provided in a wall portion (13) of the cooling box to maintain the temperature inside the cooling box lower than the temperature outside; An X-ray inspection device (1) comprising:

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