Light boxes and color sorters

Abstract

The present invention provides a light box and a color sorter. The light box includes a housing, multiple lights, a fan, and an air duct. The housing has a sealed storage space. Multiple lights are arranged in the storage space. The fan is arranged in the storage space and has an air intake and an air exhaust. The air intake is connected to at least the portion of the storage space occupied by the multiple lights. The air duct is arranged in the storage space and adjacent to the multiple lights. The air duct includes an air inlet and multiple air outlets. The air inlet is arranged at one end of the arrangement direction of the air duct. The air inlet is connected to the air outlet. Multiple air outlets are arranged on the wall of the air duct adjacent to the multiple lights. Each air outlet is adjacent to and faces a corresponding light. The cross-sectional area of ​​each air outlet is smaller than the cross-sectional area of ​​the air inlet. The sum of the cross-sectional areas of all the air outlets is smaller than the cross-sectional area of ​​the air inlet. As a result, the heat dissipation efficiency of each lamp is improved, the temperature consistency of all lamps is improved, the working stability and consistency are improved, and the temperature uniformity of the housing is improved.

Description

Technical Field

[0001] The present invention relates to the field of lighting, and in particular to a light box and a color sorter. Background Art

[0002] To lower the ambient temperature inside the halogen light box of a color sorter, major color sorter manufacturers add air ducts to the halogen light box. This air duct circulates air to dissipate heat and reduce the temperature inside the box. These ducts are typically hollow structures with a rectangular cross-section that is constant along the longitudinal direction. An air inlet and an air outlet are located at each end of the duct.

[0003] The existing air duct structure within the halogen lamp housing of a color sorter only has two openings: an air inlet and an air outlet. The air pressure near the halogen lamp, which is farther from the air outlet, is lower, and the air flow near the lampshade is poor. Furthermore, the air flowing through this area has already passed over several halogen lamps near the air outlet, causing the air temperature to rise, which is not conducive to heat dissipation of the halogen lamps in this area. The current air duct structure easily causes uneven temperature within the halogen lamp housing, with a gradient change: the temperature is lower near the air outlet and higher near the air inlet, resulting in poor temperature consistency. Summary of the Invention

[0004] In view of the problems existing in the background technology, one object of the present invention is to provide a light box and a color sorter, wherein the light box can obtain greater wind pressure near each lamp in the box, enhance the air flow near each lamp, improve the air cooling and heat dissipation efficiency of each lamp, improve the temperature consistency of all lamps, improve the temperature uniformity of at least the part occupied by multiple lamps of the box, and improve the working stability and consistency of all lamps.

[0005] In order to achieve the above-mentioned objectives, in a first aspect, the present invention provides a light box, which includes a box body, multiple lamps, a fan and an air duct; the box body has a closed receiving space; multiple lamps are arranged in the receiving space of the box body and arranged along the arrangement direction; the fan is arranged in the receiving space of the box body, and the fan has an air intake and an air exhaust, and the air intake of the fan is connected with at least the part of the receiving space of the box body occupied by the multiple lamps; the air duct is arranged in the receiving space of the box body, extends along the arrangement direction and is adjacent to the multiple lamps, the air duct includes an air inlet and multiple air outlets, the air inlet is arranged at one end of the arrangement direction of the air duct, the air inlet of the air duct is connected with the air outlet of the fan, and the multiple air outlets are arranged on the wall of the air duct adjacent to the multiple lamps, each air outlet is adjacent to and faces a corresponding lamp, the cross-sectional area of ​​each air outlet is smaller than the cross-sectional area of ​​the air inlet, and the sum of the cross-sectional areas of all air outlets is smaller than the cross-sectional area of ​​the air inlet.

[0006] In one embodiment, the lamp is a halogen lamp.

[0007] In one embodiment, the light box further includes a plurality of lampshades and a plurality of brackets, each bracket being disposed in the receiving space of the box body, and each lampshade being fixed on a corresponding bracket and covering a corresponding lamp.

[0008] In one embodiment, each lampshade includes a first curved plate, a second curved plate and a third flat plate, the first curved plate is adjacent to the box body, the second curved plate is adjacent to the air duct, and the third flat plate is connected between the first curved plate and the second curved plate. The first curved plate, the second curved plate and the third flat plate form a horizontal U-shape that is open on both sides of the arrangement direction, and each lamp is accommodated in the horizontal U-shaped space corresponding to a lampshade.

[0009] In one embodiment, each bracket includes a first connecting plate, a first supporting plate, a first extension plate, a joining plate, a second connecting plate, a second supporting plate and a second extension plate; the first connecting plate, the first supporting plate and the first extension plate are located on one side of the arrangement direction of the horizontal U-shaped space, and the second connecting plate, the second supporting plate and the second extension plate are located on the other side opposite to the arrangement direction of the horizontal U-shaped space; the first connecting plate and the second connecting plate are opposite in the arrangement direction, the first supporting plate and the second support plate are opposite in the arrangement direction, and the first extension plate and the second extension plate are opposite in the arrangement direction; the first connecting plate is fixed to the box body, the first supporting plate extends from the first connecting plate along the direction from the first curved plate to the second curved plate, and the first extension plate extends from the first support plate to the third flat plate corresponding to the lampshade; the second connecting plate is fixed to the box body, the second supporting plate extends from the second connecting plate along the direction from the first curved plate to the second curved plate, and the second extension plate extends from the second support plate to the third flat plate corresponding to the lampshade; the two ends of the joining plate are respectively connected to the first extension plate and the second extension plate, and the joining plate abuts the outer side of the third flat plate in a face-to-face manner and is fixed to the third flat plate corresponding to the lampshade.

[0010] In one embodiment, the fan is a centrifugal fan, and the air intake and air exhaust of the centrifugal fan are orthogonal.

[0011] In one embodiment, each air outlet of the air duct is slit-shaped and extends in the transverse direction of the air duct.

[0012] In one embodiment, the cross-sectional area of ​​the air outlet upstream in the longitudinal direction of the air duct is smaller than the cross-sectional area of ​​the air outlet downstream in the longitudinal direction of the air duct.

[0013] In one embodiment, each air outlet of the air duct has an inlet and an outlet, and the cross-sectional area of ​​each air outlet gradually decreases along the direction from the inlet to the outlet.

[0014] In one embodiment, the air duct is funnel-shaped near the air inlet.

[0015] In one embodiment, the light box further includes a plurality of guide plates, each guide plate being disposed on the outside of the air duct, each guide plate being adjacent to a corresponding air outlet and directing the exhaust air from the corresponding air outlet to the corresponding lamp.

[0016] In one embodiment, the light box further includes a radiator, which is disposed in the receiving space and connected to the box body, for performing heat exchange with the air in the receiving space to absorb heat from the air and then discharging the absorbed heat out of the box body through the box body.

[0017] In one embodiment, the heat sink includes a plurality of fins that are spaced apart and extend away from a portion connected to the box body; the heat sink is one and each fin extends over the entire longitudinal length of the air duct.

[0018] In one embodiment, the plurality of fins are distributed over the entire transverse dimension of the air duct and the entire height dimension perpendicular to the transverse and longitudinal directions.

[0019] To achieve the above-mentioned object, in a second aspect, the present invention provides a color sorter, comprising the light box according to the first aspect of the present invention.

[0020] The beneficial effects of the present invention are as follows:

[0021] Compared to the prior art, which employs a single air outlet with a cross-sectional area equal to that of the air inlet, by providing multiple air outlets, ensuring that the sum of the cross-sectional areas of all the air outlets is less than the cross-sectional area of ​​the air inlet, and each air outlet is adjacent and oriented toward a corresponding lamp, and the cross-sectional area of ​​each air outlet is smaller than that of the air inlet, the air flow rate at each air outlet is accelerated, thereby achieving greater wind pressure near each lamp within the cabinet, enhancing air flow near each lamp, and improving the air cooling and heat dissipation efficiency of each lamp. Furthermore, along the air flow direction in the air duct, by consistently matching the heat exchange performance at each air outlet with the degree of superposition of hot air received by the lamps at each air outlet, the temperature consistency of all lamps can be improved, as can the temperature uniformity of at least the portion of the cabinet's housing space occupied by the multiple lamps, thereby improving the stability and consistency of operation of all lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of a light box according to an embodiment of the present invention is shown.

[0023] Figure 2 yes Figure 1 Front view of.

[0024] Figure 3 yes Figure 2 Magnified view of the circled part.

[0025] Figure 4 yes Figure 3A variation of .

[0026] Figure 5 yes Figure 1 A top view of the device with the heat sink removed for clarity.

[0027] Figure 6 yes Figure 5 A variation of .

[0028] Figure 7 yes Figure 1 Side sectional view of .

[0029] Figure 8 yes Figure 7 A variation of .

[0030] The description of the accompanying drawings is as follows:

[0031] 1 Box Wb second wall

[0032] 11. Third wall of the surrounding wall Wc

[0033] 12 End wall Wd fourth wall

[0034] 13 Door cover We fifth wall

[0035] 14 Glass L vertical

[0036] 15 capping T horizontal

[0037] S storage space 5 lampshade

[0038] W1 top wall 51 first curved plate

[0039] W2 bottom wall 52 second curved plate

[0040] W3 front wall 53 third flat plate

[0041] W4 rear wall 54 horizontal U-shaped space

[0042] W5 left wall 6 bracket

[0043] W6 right wall 61a first connecting plate

[0044] 2 lamp 61b second connecting plate

[0045] R arrangement direction 62a first support plate

[0046] 3 Fan 62b second support plate

[0047] 31 air inlet 63a first extension plate

[0048] 32 air outlet 63b second extension plate

[0049] 4 air duct 64 joint plate

[0050] 41 air inlet 7 deflector

[0051] 42 air outlet 71 end edge

[0052] 421 imported 8 radiator

[0053] 422 outlet 81 fin

[0054] Wa first wall DETAILED DESCRIPTION

[0055] The accompanying drawings illustrate embodiments of the present invention, and it will be understood that the disclosed embodiments are merely examples of the present invention, which can be implemented in various forms. Therefore, the specific details disclosed herein should not be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously implement the present invention.

[0056] In addition, expressions such as up, down, left, right, front and back, etc., used to indicate directions for describing the operation and construction of the components in the embodiments are not absolute but relative, and although these indications are appropriate when the components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0057] Figure 1 A perspective view of a light box 1 according to an embodiment of the present invention is shown. Figure 2 yes Figure 1 Front view of Figure 3 yes Figure 2 An enlarged view of the circled part of Figure 4 yes Figure 3 A variation of Figure 5 yes Figure 1 A top view of the heat sink is removed for clarity. Figure 6 yes Figure 5 A variation of Figure 7 yes Figure 1 A side sectional view of Figure 8 yes Figure 7 A variation of .

[0058] The light box includes a housing 1, multiple lamps 2, a fan 3, and an air duct 4. Depending on actual use, the light box also includes multiple lampshades 5 and multiple brackets 6. Depending on actual use, the light box may also include multiple deflectors 7 and a radiator 8.

[0059] The box body 1 has a sealed receiving space S. The box body 1 includes a peripheral wall 11, two end walls 12, a door cover 13 and a glass 14. According to actual use, the box body 1 may further include a cover 15.

[0060] The box body 1 includes a top wall W1, a bottom wall W2, a front wall W3, a rear wall W4, a left wall W5 and a right wall W6. The top wall W1, the bottom wall W2, the front wall W3 and the rear wall W4 constitute a peripheral wall 11, and the left wall W5 and the right wall W6 constitute two end walls 12. Figure 1 As shown, the outer shape of the box body 1 is an elongated rectangular parallelepiped, but is not limited thereto. The outer shape of the box body 1 can be an elongated cylinder, as long as it can be arranged in the closed receiving space S along the arrangement direction R (in the figure, the arrangement direction R is parallel to the longitudinal direction L of the air duct 4).

[0061] A door cover 13 is provided on the peripheral wall 11 and adjacent to the plurality of lamps 2. The door cover 13 is used to open and close the box body 1 for facilitating maintenance and replacement of the lamps 2. In the example shown in the figure, the door cover 13 is provided on the rear wall W4.

[0062] Glass 14 is installed on the peripheral wall 11 and opposite the door cover 13, so that the multiple lamps 2 are located between the door cover 13 and the glass 14 in a direction intersecting the arrangement direction R (for example, along the transverse direction T of the air duct 4). In the example shown in the figure, the glass 14 is installed on the front wall W3. The front wall W3 faces the object to be illuminated, so that light from the lamps 2 passes through the glass and illuminates the object (for example, particulate matter in a color sorter).

[0063] The cover 15 is detachably mounted on the peripheral wall 11 and corresponds in position to the fan 3. In the example shown in the figure, the cover 15 is mounted on the top wall W1 to facilitate installation and maintenance of the fan 3.

[0064] Multiple lamps 2 are disposed within the housing S of the housing 1 and arranged along an arrangement direction R. Based on actual usage, the lamps 2 are halogen lamps, which are suitable for current color sorting machine requirements. Of course, other types of lamps, such as incandescent lamps or LED lamps, may be used for applications in other technical fields.

[0065] The fan 3 is disposed within the storage space S of the housing 1. The fan 3 has an air intake 31 and an air outlet 32. The air intake 31 of the fan 3 is in communication with at least the portion of the storage space S of the housing 1 occupied by the plurality of lamps 2. The type of fan is not limited. Based on compactness of space usage, the fan 3 is preferably a centrifugal fan, with the air intake 31 and the air outlet 32 ​​being orthogonal. Specifically, in the example shown in the figure, the air outlet 32 ​​is in the longitudinal direction L of the air duct 4, and the air intake 31 faces the bottom wall W2.

[0066] The air duct 4 is disposed within the housing S of the housing 1, extending along the arrangement direction R and adjacent to the plurality of lamps 2. The air duct 4 includes an air inlet 41 and a plurality of air outlets 42. The air inlet 41 is disposed at one end of the air duct 4 in the arrangement direction R, and the air inlet 41 of the air duct 4 communicates with the exhaust port 32 of the fan 3. The plurality of air outlets 42 are disposed on a wall of the air duct 4 adjacent to the plurality of lamps 2 (in the example shown in the figure, this may be the fourth wall Wd described later).

[0067] Each air outlet 42 is adjacent to and faces a corresponding lamp 2, and the cross-sectional area of ​​each air outlet 42 (i.e., the area of ​​a cross section drawn on a plane perpendicular to the air flowing through the air outlet 42) is smaller than the cross-sectional area of ​​the air inlet 41 (i.e., the area of ​​a cross section drawn on a plane perpendicular to the air flowing through the air inlet 41), and the sum of the cross-sectional areas of all the air outlets 42 is smaller than the cross-sectional area of ​​the air inlet 41. Compared with the case in the background art where a single air outlet is used and the cross-sectional area of ​​the air outlet is equal to the cross-sectional area of ​​the air inlet, by providing multiple air outlets 42, making the sum of the cross-sectional areas of all the air outlets 42 smaller than the cross-sectional area of ​​the air inlet 41, each air outlet 42 is adjacent to and faces a corresponding lamp 2, and the cross-sectional area of ​​each air outlet 42 is smaller than the cross-sectional area of ​​the air inlet 41, the air flow rate of each air outlet 42 is accelerated, so that a greater wind pressure can be obtained near each lamp 2 in the box 1, the air flow near each lamp 2 is enhanced, and the air cooling and heat dissipation efficiency of each lamp 2 is improved. In addition, along the air flow direction in the air duct 4, the lamp 2 at the most upstream air outlet 42 will be subjected to the hot air superimposed by the heat exchange of the lamps 2 at the remaining air outlets 422 at the downstream (this superposition degree is the largest). The air outlet 42 at the most upstream is closest to the exhaust port 32 and has the highest heat exchange performance. The air discharged from the most upstream air outlet 42 with the highest heat exchange performance is mixed with the hot air with the largest superposition degree. Similarly, the heat exchange performance of the downstream air outlet 42 is lower than that of the adjacent upstream air outlet 42, but the heat exchange performance of the lamp 2 at the downstream air outlet 42 is greater than that of the adjacent upstream air outlet 42. The degree of superposition of the hot air received by the lamps 2 at the upstream air outlet 42 is lower than that received by the lamps 2 at the upstream air outlet 42, and the air discharged from the downstream air outlet 42 with relatively low heat exchange performance is mixed with the hot air with relatively low superposition; based on the consistent matching of the heat exchange performance at each air outlet 42 and the degree of superposition of the hot air received by the lamps 2 at each air outlet 42, the temperature consistency of all lamps 2 can be improved, the temperature uniformity of the part occupied by at least multiple lamps 2 in the accommodating space S of the box body 1 can be improved, and the working stability and consistency of all lamps 2 can be improved. Figure 5 In the embodiment, the cross-sectional area of ​​the air outlet 42 upstream of the air flow along the longitudinal direction L of the air duct 4 is equal to the cross-sectional area of ​​the air outlet 42 upstream of the air flow downstream along the longitudinal direction L of the air duct 4. Figure 6In the embodiment, the cross-sectional area of ​​the air outlet 42 upstream of the air flow along the longitudinal direction L of the air duct 4 is smaller than the cross-sectional area of ​​the air outlet 42 downstream of the air flow along the longitudinal direction L of the air duct 4. Figure 6 The design can make the heat exchange performance at each air outlet 42 and the degree of superposition of the hot air received by the lamps 2 at each air outlet 42 more consistent in terms of height, can make the temperature consistency of all lamps 2 better, make the temperature uniformity of at least the part occupied by multiple lamps 2 in the accommodating space S of the box body 1 better, and make the working stability and consistency of all lamps 2 better.

[0068] On the premise that the sum of the cross-sectional areas of all the air outlets 42 is smaller than the cross-sectional area of ​​the air inlet 41 and the cross-sectional area of ​​each air outlet 42 is smaller than the cross-sectional area of ​​the air inlet 41, the smaller the cross-sectional area of ​​each air outlet 42 is compared with the cross-sectional area of ​​the air inlet 41, the greater the wind pressure that can be obtained near each lamp 2 in the box 1, the better the air flow near each lamp 2, the higher the air cooling efficiency of each lamp 2, the better the temperature consistency of all the lamps 2, the better the temperature uniformity of the part occupied by at least multiple lamps 2 in the accommodating space S of the box 1, and the better the working stability and consistency of all the lamps 2.

[0069] Preferably, each air outlet 42 of the air duct 4 is slit-shaped and extends along the transverse direction T of the air duct 4, such as Figure 5 and Figure 6 As shown. Figure 3 and Figure 4 As shown, each air outlet 42 of the air duct 4 has an inlet 421 and an outlet 422. Figure 3 In the embodiment, the cross-sectional area of ​​each air outlet 42 along the direction from the inlet 421 to the outlet 422 is constant. Figure 4 In the embodiment, the cross-sectional area of ​​each air outlet 42 along the direction from the inlet 421 to the outlet 422 gradually decreases. By gradually decreasing the cross-sectional area of ​​each air outlet 42 along the direction from the inlet 421 to the outlet 422, the air flow rate of each air outlet 42 can be further accelerated (that is, the air flow rate at the outlet 422 is further accelerated). Thus, the air entering the air duct 4 from the air inlet 41 is pressurized once at the inlet 421 of each air outlet 42, and pressurized twice at the outlet 422 of each air outlet 42. Thus, the air flow rate is accelerated twice, thereby further improving the air fluidity at the outlet 422 of each air outlet 42, further improving the air cooling and heat dissipation efficiency of each lamp 2, further improving the temperature consistency of all lamps 2, further improving the temperature uniformity of at least the part occupied by multiple lamps 2 in the accommodating space S of the box body 1, and further improving the working stability and consistency of all lamps 2.

[0070] The air duct 4 includes a first wall Wa, a second wall Wb, a third wall Wc, a fourth wall Wd, and a fifth wall We. The first wall Wa is located at one end of the longitudinal direction L of the air duct 4 and is opposite the air inlet 41. The second wall Wb and the third wall Wc are opposite, spaced apart, and located on both sides of the transverse direction T of the air duct 4. The fourth wall Wd is adjacent to the plurality of lamps 2. The fourth wall Wd and the fifth wall We are opposite, spaced apart, and connect the first wall Wa, the second wall Wb, and the third wall Wc to form the air inlet 41. The plurality of air outlets 42 are provided on the fourth wall Wd.

[0071] For example, Figure 7 and Figure 8 As shown, the first wall Wa of the air duct 4 is a portion of the left wall W5 of the box body 1, and the fifth wall We of the air duct 4 is at least a portion of the top wall W1 of the box body 1. Thus, the structure of the air duct 4 fully utilizes the structure of the same 1, making the internal space of the air duct 4 as large as possible within the limited storage space S of the box body 1, thereby facilitating the improvement of air flow; in addition, the structure is simplified and the number of components is reduced, thereby reducing costs. On this basis, further, as shown in FIG. Figure 8 As shown, the second wall Wb of the air duct 4 is a portion of the front wall W3 of the housing 1, and the third wall Wc of the air duct 4 is a portion of the rear wall W4 of the housing 1. This design further leverages the structure of the same 1 and serves the same purpose as previously described. Furthermore, the fifth wall We of the air duct 4 is configured to be removably attached to the top wall W1 to facilitate replacement of the radiator within the air duct 4. Furthermore, the fifth wall We of the air duct 4 can be a glass-like plate to facilitate observation of the operating status of the air duct 4 (particularly the air outlet 42), allowing for manual monitoring of the air duct 4 for the presence of foreign matter and prompt resolution.

[0072] like Figure 2 As shown, the dimensions of the second wall Wb and the third wall Wc at the position of the air inlet 41 are larger than those at other positions, so that the air duct 4 is funnel-shaped near the air inlet 41. The funnel-shaped design is conducive to forming air pressurization on the downstream side of the funnel (i.e., the air outlet side), increasing the air flow rate, and thus improving the heat dissipation efficiency of the lamp 2. When combined with the two pressurizations described above, it further improves the temperature consistency of all lamps 2, further improves the temperature uniformity of at least the portion of the housing space S of the box body 1 occupied by multiple lamps 2, and further improves the stability and consistency of the operation of all lamps 2. In addition, the funnel-shaped design is conducive to the installation of the fan 3 using a centrifugal fan and shape matching, thereby optimizing the use of space.

[0073] Each lampshade 5 is fixed on the corresponding bracket 6 and covers the corresponding lamp 2. Figure 1 、 Figure 2 and Figure 7In the illustrated example, each lampshade 5 comprises a first curved plate 51, a second curved plate 52, and a third flat plate 53. The first curved plate 51 is adjacent to the housing 1, the second curved plate 52 is adjacent to the air duct 4, and the third flat plate 53 is connected between the first and second curved plates 51, 52. The first, second, and third curved plates 51, 52, 53 form a horizontal U-shape open on both sides in the arrangement direction R. Each lamp 2 is housed within the horizontal U-shaped space 54 corresponding to a lampshade 5. The open horizontal U-shape allows air exhausted from the air outlet 42 corresponding to each lampshade 5 to flow directly to the corresponding lamp 2, thereby improving the heat dissipation efficiency of the corresponding lamp 2. The provision of the first and second curved plates 51, 52 facilitates the refraction and convergence of light emitted by the lamps 2, thereby maximizing the amount of light emitted by the lamps 2 focused on the illuminated object.

[0074] Each bracket 6 is arranged in the receiving space S of the box body 1. Figure 1 、 Figure 2 and Figure 7 In the example shown, each bracket 6 includes a first connecting plate 61 a , a first supporting plate 62 a , a first extending plate 63 a , a joining plate 64 , a second connecting plate 61 b ​​, a second supporting plate 62 b , and a second extending plate 63 b .

[0075] The first connecting plate 61a, the first support plate 62a, and the first extension plate 63a are located on one side of the horizontal U-shaped space 54 in the arrangement direction R. The second connecting plate 61b, the second support plate 62b, and the second extension plate 63b are located on the other side of the horizontal U-shaped space 54 opposite the arrangement direction R. The first connecting plate 61a and the second connecting plate 61b are opposite each other in the arrangement direction R. The first support plate 62a and the second support plate 62b are opposite each other in the arrangement direction R. The first extension plate 63a and the second extension plate 63b are opposite each other in the arrangement direction R. The first connecting plate 61a is fixed to the housing 1. The first support plate 62a extends from the first connecting plate 61a in a direction from the first curved plate 51 to the second curved plate 52. The first extension plate 63a extends from the first support plate 62a toward the third flat plate 53 of the corresponding lampshade 5. The second connecting plate 61b is fixed to the housing 1. The second supporting plate 62b extends from the second connecting plate 61b in a direction from the first curved plate 51 to the second curved plate 52. The second extension plate 63b extends from the second supporting plate 62b toward the third flat plate 53 of the corresponding lampshade 5. The first and second extension plates 63a and 63b are connected at both ends of the joining plate 64. The joining plate 64 abuts the outer side of the third flat plate 53 in a face-to-face manner and is fixed to the third flat plate 53 of the corresponding lampshade 5 (e.g., by bonding, screwing, welding, etc.). This design of multiple curved plates improves the three-dimensional cushioning performance of the light box against external impacts (e.g., impacts in the arrangement direction R (i.e., the left-right direction), impacts in the front-to-back direction perpendicular to the arrangement direction R, and impacts in the up-down direction perpendicular to the arrangement direction R). This improves the stability of the illumination of each lamp 2 during operation, thereby enhancing the functionality (e.g., the color sorting effect in a color sorter) of the illumination of the lamp 2 in various other applications (e.g., color sorting machines).

[0076] Each guide plate 7 is arranged on the outside of the air duct 4. Each guide plate 7 is adjacent to a corresponding air outlet 42 and guides the exhaust air of the corresponding air outlet 42 to the corresponding lamp 2. When the lampshade 5 is used, each guide plate 7 guides the exhaust air of the corresponding air outlet 42 to the side of the arrangement direction R of the aforementioned horizontal U-shaped space 54. Each guide plate 7 can guide and converge the air to the corresponding lamp 2, thereby improving the heat dissipation effect and heat dissipation efficiency of the lamp 2. Each guide plate 7 is arc-shaped and adjacent to the first arc-shaped plate 51 of the corresponding lampshade 5, and the end edge 71 of the guide plate 7 points to the horizontal U-shaped space 54, so that the air flows smoothly along the arc-shaped guide plate 7 and the direction of the air flow is easy to control.

[0077] The radiator 8 is disposed within the storage space S and connected to the housing 1. It is configured to exchange heat with the air within the storage space S, absorbing heat from the air and dissipating the absorbed heat through the housing 1 to the exterior of the housing 1. The location of the radiator 8 within the storage space S is not particularly limited, as long as it can dissipate heat generated by the multiple lamps 2 within the storage space S through the radiator 8 and the housing 1. In the example shown in the figure, the radiator 8 is disposed within the air duct 4 and connected to the housing 1. It is configured to exchange heat with the air within the air duct 4, absorbing heat from the air, and dissipating the absorbed heat through the housing 1 to the exterior of the housing 1.

[0078] The radiator 8 includes a plurality of fins 81, and the plurality of fins 81 are spaced apart and extend away from the portion connected to the housing 1. The fins 81 increase the heat exchange area and enhance heat dissipation. The provision of a plurality of fins 81 can also achieve the effect of air pressurization and the other effects mentioned above. The number of radiators 8 can be determined according to actual conditions. For example, the radiator 8 can be one and each fin 81 extends over the entire longitudinal length of the air duct 4, thereby facilitating the improvement of the temperature consistency of the air at all air outlets 42, improving the air cooling and heat dissipation efficiency, further improving the temperature consistency of all lamps 2, further improving the temperature uniformity of at least the portion of the housing space S of the housing 1 occupied by the plurality of lamps 2, further improving the working stability and consistency of all lamps 2, and more preferably, referring to Figure 7 and Figure 8 The plurality of fins 81 are distributed over the entire transverse dimension of the air duct 4 and the entire height dimension perpendicular to the transverse direction T and the longitudinal direction L (referred to as the height dimension). In other words, the plurality of fins 81 are distributed over the entire longitudinal dimension, transverse dimension, and height dimension of the air duct 4, thereby further enhancing the aforementioned effect. Alternatively, for example, the heat sink 8 may be provided in a plurality and spaced apart along the arrangement direction R.

[0079] The following is a brief description of the heat dissipation process of the light box.

[0080] When the light box is working, under the action of the fan 3, the air in the receiving space S of the box body 1 is discharged into the receiving space S of the box body 1 through the air intake 31 of the fan 3, the interior of the fan 3, the air exhaust 32 of the fan 3, the air inlet 41 of the air duct 4, the interior of the air duct 4, and the multiple air outlets 42 of the air duct 4 (if necessary, (specifically, for example, through the radiator 8 and the box body 1) and can then pass through the guide plate 7) and perform heat exchange with multiple lamps 2 to absorb heat. The air that absorbs heat is sucked in through the air intake 31 of the fan 3 and circulated thereby, and the heat absorbed by the air is dissipated through the box body 1 (if necessary, for example, through the radiator 8 and the box body 1).

[0081] The light box according to the present invention can be applied to a color sorter. In other words, the color sorter includes the light box. Of course, it is not limited thereto. The light box with the above structure can be applied to any social security with heat dissipation requirements.

[0082] The above detailed description describes multiple exemplary embodiments, but this document is not intended to be limited to the explicitly disclosed combinations. Therefore, unless otherwise stated, the various features disclosed herein can be combined to form multiple additional combinations that are not shown for the sake of simplicity.

Claims

1. A light box, characterized in that: It comprises a box (1), a plurality of lamps (2), a fan (3) and a single air duct (4); The box (1) has a sealed receiving space (S); A plurality of lamps (2) are arranged in a receiving space (S) of the box (1) and arranged along an arrangement direction (R); The fan (3) is arranged in the receiving space (S) of the box (1), and the fan (3) has an air intake (31) and an air exhaust (32), and the air intake (31) of the fan (3) is in communication with at least a portion of the receiving space (S) of the box (1) occupied by the plurality of lamps (2); The air duct (4) is arranged in the receiving space (S) of the box (1), extends along the arrangement direction (R) and is adjacent to the plurality of lamps (2). The air duct (4) includes a single air inlet (41) and a plurality of air outlets (42). The air inlet (41) is arranged at one end of the arrangement direction (R) of the air duct (4). The air inlet (41) of the air duct (4) is connected to the air outlet (32) of the fan (3). The plurality of air outlets (42) are arranged on the wall of the air duct (4) adjacent to the plurality of lamps (2). Each air outlet (42) is adjacent to and faces a corresponding lamp (2). The cross-sectional area of ​​each air outlet (42) is smaller than the cross-sectional area of ​​the air inlet (41), and the sum of the cross-sectional areas of all the air outlets (42) is smaller than the cross-sectional area of ​​the air inlet (41). The air intake (31) of the fan (3), the interior of the fan (3), the air outlet (32) of the fan (3), the single air inlet (41) of the single air duct (4), the interior of the single air duct (4), the multiple air outlets (42) of the air duct (4), at least the portion of the receiving space (S) of the box (1) occupied by the multiple lamps (2), and the air intake (31) of the fan (3) form an air circulation flow path; The heat exchange performance of the downstream air outlet (42) is lower than the heat exchange performance of the adjacent upstream air outlet (42).

2. The light box according to claim 1, characterized in that: The lamp (2) is a halogen lamp.

3. The light box according to claim 1, characterized in that: The light box further comprises a plurality of lampshades (5) and a plurality of brackets (6), each bracket (6) being arranged in a receiving space (S) of the box body (1), and each lampshade (5) being fixed on a corresponding bracket (6) and covering a corresponding lamp (2).

4. The light box according to claim 3, characterized in that: Each lampshade (5) includes a first curved plate (51), a second curved plate (52) and a third flat plate (53), the first curved plate (51) is adjacent to the box body (1), the second curved plate (52) is adjacent to the air duct (4), and the third flat plate (53) is connected between the first curved plate (51) and the second curved plate (52), the first curved plate (51), the second curved plate (52) and the third flat plate (53) form a horizontal U-shape that is open on both sides of the arrangement direction (R), and each lamp (2) is accommodated in a horizontal U-shaped space (54) corresponding to a lampshade (5).

5. The light box according to claim 4, characterized in that: Each bracket (6) includes a first connecting plate (61a), a first supporting plate (62a), a first extending plate (63a), a joining plate (64), a second connecting plate (61b), a second supporting plate (62b) and a second extending plate (63b); The first connecting plate (61a), the first supporting plate (62a), and the first extending plate (63a) are located on one side of the arrangement direction (R) of the horizontal U-shaped space (54), and the second connecting plate (61b), the second supporting plate (62b), and the second extending plate (63b) are located on the other side opposite to the arrangement direction (R) of the horizontal U-shaped space (54); The first connecting plate (61a) and the second connecting plate (61b) are opposite to each other in the arrangement direction (R), the first supporting plate (62a) and the second supporting plate (62b) are opposite to each other in the arrangement direction (R), and the first extending plate (63a) and the second extending plate (63b) are opposite to each other in the arrangement direction (R); The first connecting plate (61a) is fixed to the box body (1), the first supporting plate (62a) extends from the first connecting plate (61a) in a direction from the first curved plate (51) to the second curved plate (52), and the first extending plate (63a) extends from the first supporting plate (62a) to the third flat plate (53) corresponding to the lampshade (5); The second connecting plate (61b) is fixed to the box body (1), the second supporting plate (62b) extends from the second connecting plate (61b) in a direction from the first curved plate (51) to the second curved plate (52), and the second extending plate (63b) extends from the second supporting plate (62b) to the third flat plate (53) corresponding to the lampshade (5); The two ends of the connecting plate (64) are respectively connected to the first extension plate (63a) and the second extension plate (63b). The connecting plate (64) abuts against the outer side of the third flat plate (53) in a face-to-face manner and is fixed to the third flat plate (53) corresponding to the lampshade (5).

6. The light box according to claim 1, characterized in that: The fan (3) is a centrifugal fan, and the air inlet (31) and the air outlet (32) of the centrifugal fan are orthogonal.

7. The light box according to claim 1, characterized in that: Each air outlet (42) of the air duct (4) is slit-shaped and extends along the transverse direction (T) of the air duct (4).

8. The light box according to claim 1, characterized in that: The cross-sectional area of ​​the air outlet (42) upstream of the air flow in the longitudinal direction (L) of the air duct (4) is smaller than the cross-sectional area of ​​the air outlet (42) downstream of the air flow in the longitudinal direction of the air duct (4).

9. The light box according to claim 7, characterized in that: Each air outlet (42) of the air duct (4) has an inlet (421) and an outlet (422), and the cross-sectional area of ​​each air outlet (42) gradually decreases along the direction from the inlet (421) to the outlet (422).

10. The light box according to claim 1, characterized in that The air duct (4) is funnel-shaped near the air inlet (41).

11. The light box according to claim 1, characterized in that: The light box further comprises a plurality of guide plates (7), each guide plate (7) being arranged on the outer side of the air duct (4), each guide plate (7) being adjacent to a corresponding air outlet (42) and guiding the exhaust air of the corresponding air outlet (42) to the corresponding lamp (2).

12. The light box according to claim 1, wherein: The light box further comprises a radiator (8), which is arranged in the receiving space (S) and connected to the box body (1) for performing heat exchange with the air in the receiving space (S) to absorb heat from the air and then discharge the absorbed heat to the outside of the box body (1) via the box body (1).

13. The light box according to claim 12, characterized in that: The radiator (8) comprises a plurality of fins (81) which are spaced apart and extend away from the portion connected to the box (1); the radiator (8) is one and each fin (81) extends over the entire longitudinal length of the air duct (4).

14. The light box according to claim 13, characterized in that: The plurality of fins (81) are distributed over the entire transverse dimension of the air duct (4) and the entire height dimension perpendicular to the transverse direction (T) and the longitudinal direction (L).

15. A color sorter, characterized in that: Comprising a light box according to any one of claims 1-14.

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