JP2013089304A - Lighting fixture for straight tube type led lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture for a straight tube type LED lamp capable of suppressing a temperature rise of a power supply unit and improving service life of the power supply unit, without using a fan for exhaust.SOLUTION: The lighting fixture for the straight tube type LED lamp includes a long shaped chassis which has a power supply unit fixed on its lower face and lamp sockets (power supply side lamp socket and a grounding side lamp socket) on both ends fixed perpendicularly, a case open upward which is mounted on the lower face of the chassis with a prescribed space formed against the chassis, and a straight tube type LED lamp detachably installed between the lamp sockets. On an uppermost possible part of the case, there is formed a hot air outlet, and an outside air inlet is formed at a lower position than the hot air outlet.

Description

  The present invention relates to a lighting device for a straight tube LED lamp, and more specifically, relates to a lighting device for a straight tube LED lamp having a structure capable of efficiently dissipating heat generated by a power supply unit. Is.

  With the recent increase in energy saving, electric appliances are rapidly saving power. In lighting fixtures, products using LED elements that have a long service life and high luminous efficiency are attracting attention in place of conventional incandescent lighting and fluorescent lamps.

  In particular, lighting fixtures equipped with straight tube fluorescent lamps have been widely used in offices, stores, etc., and by replacing such lighting fixtures with lighting fixtures equipped with straight tube LED lamps, extremely large power savings can be achieved. The effect can be expected.

  The straight tube LED lamp is used in the form as shown in FIGS. 17A and 17B, for example. That is, a power supply unit 303 is fixed, a longitudinal chassis 302 with lamp sockets 304 and 305 suspended from both ends is attached to the ceiling C, and a longitudinally upward opening case is formed on the chassis 302 so as to cover the chassis 302. A straight-tube LED lamp luminaire in which a sealed space is formed between the case 301 and the ceiling C by mounting 301, and a straight-tube LED lamp La is detachably mounted between the lamp sockets 304 and 305. 300.

  The straight tube type LED lamp has a structure in which a long substrate in which a plurality of LED elements are arranged is provided in a cylindrical lamp case, and its service life is deteriorated by heat of the sealing resin of the LED element. It depends heavily on

  Therefore, for example, the substrate of the LED element is made of a material having high thermal conductivity as in Patent Document 1, or the heat radiation effect is enhanced by providing a heat sink in a straight tube LED lamp as in Patent Document 2, Many proposals have been made to improve the service life.

JP2007-281468 JP2011-1113876

  However, while the service life of the straight tube LED lamp is increased in this way, the service life of the power supply unit is not so extended. It may be said that the service life is determined. Therefore, in order to realize a long-term maintenance-free straight tube type LED lamp illuminator, it becomes a problem to improve the service life of the power supply unit.

  The service life of the power supply unit also largely depends on deterioration due to heat. As shown in FIGS. 17A and 17B, the power supply unit 303 is housed in a sealed space formed between the case 301 and the ceiling C. The power supply unit 303 is the largest heat generation source in the lighting device 300 for the straight tube LED lamp, and the heat generated by the power supply unit 303 is trapped in the sealed space, so that the service life of the power supply unit 303 is shortened. There was a problem. Therefore, how to dissipate the heat trapped in this sealed space to the outside of the case 301 becomes a problem.

  In such a case, it may be possible to provide an exhaust fan in the case 301 to forcibly release the heat inside the case 301, but this is not preferable because noise is generated due to the rotation of the fan. Moreover, electric power is required for rotation of a fan, and the energy saving property of a straight tube | pipe type LED lamp will be impaired.

  The present invention has been made to solve the above-described problems, and is a straight tube LED that improves the service life of the power supply unit by suppressing the temperature rise of the power supply unit without using an exhaust fan. It aims at providing the lighting fixture for lamps.

  (1) A straight tube type LED lamp lighting fixture according to the present invention includes a longitudinal chassis in which a power supply unit is fixed on a lower surface and lamp sockets are vertically suspended at both ends, and a lower surface of the chassis between the chassis. An upper opening case mounted in a fixed space and a straight tube LED lamp detachably mounted between the lamp sockets, and a hot air outlet is formed in the upper part of the case as much as possible. An outside air inlet is formed at a position below the hot air outlet.

  (2) Further, according to the present invention, in the lighting device for a straight tube type LED lamp described in the above (1), the outside air inlet is blocked by a first filter adhered to the outer peripheral surface of the peripheral edge of the outside air inlet. It is characterized by that.

  (3) Moreover, this invention is the lighting equipment for straight tube | pipe type LED lamps as described in said (1) or (2), The said hot air discharge port is sticking to the outer peripheral part outer surface of the said hot air discharge port. It is characterized by being blocked by 2 filters.

  According to the first aspect of the present invention, since the outside air intake port is formed at a position below the hot air exhaust port, natural ventilation resulting from a temperature difference between the air inside the case and the air outside the case becomes possible. The effect that the temperature of the power supply unit can be lowered efficiently without using a fan for the purpose is obtained. As a result, the service life of the power supply unit can be improved, and a long-term maintenance-free straight tube LED lamp illuminator can be provided.

  According to the second aspect of the present invention, dust or the like floating in the air can be prevented from entering the inside of the case from the outside air inlet. As a result, it is possible to provide a lighting device for a straight tube type LED lamp that prevents a short circuit of an electric circuit disposed inside the case and is free of long-term maintenance. In addition, since the first filter is adhered to the outer peripheral surface of the outside air suction port, deterioration of the first filter and the adhesive due to heat can be prevented as much as possible, and dust attached to the first filter can be prevented. Removal and repair when the first filter is removed are also easy.

  According to the invention of claim 3, dust or the like floating in the air can be prevented from entering the inside of the case from the hot air exhaust port. As a result, it is possible to provide a lighting device for a straight tube type LED lamp that prevents a short circuit of an electric circuit disposed inside the case and is free of long-term maintenance. In particular, when the power source unit does not generate heat and the air inside the case does not move when the light is turned off, dust or the like floating in the air can be prevented from entering the case through the hot air exhaust port. In addition, since the second filter is adhered to the outer peripheral surface of the hot air exhaust port, deterioration of the second filter and the adhesive due to heat can be prevented as much as possible, and dust attached to the second filter can be prevented. Removal and repair when the second filter is removed are also easy.

It is the perspective view which showed the use condition of the lighting fixture for 2 lamp type straight tube | pipe type LED lamps. It is the front view which showed the use condition of the lighting fixture for 2 lamp type straight tube | pipe type LED lamps. It is a disassembled perspective view of the lighting fixture for 2 lamp type straight tube | pipe type LED lamps. It is the figure which showed the electric power feeding terminal of a straight tube | pipe type LED lamp. It is the figure which showed the earthing terminal of the straight tube | pipe type LED lamp. It is sectional drawing of a straight tube | pipe type LED lamp. It is AA sectional drawing of the lighting fixture for 2 lamp type straight tube | pipe type LED lamps shown in FIG. 1B. It is the front view of the case which showed the example of the external air inlet formed in the case. It is the front view of the case which showed the other example of the external air inlet formed in the case. It is the front view of the case which showed the other example of the external air inlet formed in the case. It is the front view of the case which showed the other example of the external air inlet formed in the case. It is the side view of the longitudinal direction of the case which showed the example of the hot air discharge port formed in the case. It is the side view of the longitudinal direction of the case which showed the other example of the hot air discharge port formed in the case. It is an enlarged view of the terminal part of a case. It is an enlarged view of an outside air inlet. It is an enlarged view of the external air inlet port which attached the 1st filter. It is an expanded sectional view of the outside air inlet port which attached the 1st filter. It is an enlarged view of a hot air discharge port. It is an enlarged view of the hot air discharge port which attached the 2nd filter. It is an expanded sectional view of the hot air discharge port which attached the 2nd filter. It is sectional drawing of the lighting fixture for 2 lamp type straight tube | pipe type LED lamps which showed the flow of the air in internal space. It is sectional drawing which showed the flow of the discharge | emission of a hot air at the time of forming a hot air discharge port in the notch shape at the side surface upper end edge. It is sectional drawing which showed the flow of discharge of a hot air when a hot air guide is formed in the hot air discharge port lower edge part of a hot air discharge port. It is sectional drawing of the lighting fixture for 2 lamp type straight tube | pipe type LED lamps which provided the heat sink. It is the perspective view which showed the relationship between a straight tube | pipe type LED lamp and a heat sink. It is the perspective view which showed the use condition of the lighting fixture for 1 lamp type straight tube | pipe type LED lamps. It is the front view which showed the use condition of the lighting fixture for 1 lamp type straight tube | pipe type LED lamps. It is a disassembled perspective view of the lighting fixture for 1 lamp type straight tube | pipe type LED lamps. It is BB sectional drawing of the lighting fixture for 1 lamp type straight tube | pipe type LED lamps shown in FIG. 11B. It is the front view of the case which showed the example of the external air inlet formed in the case. It is the front view of the case which showed the other example of the external air inlet formed in the case. It is the front view of the case which showed the other example of the external air inlet formed in the case. It is an enlarged view of the terminal part of a case. It is an expanded sectional view of the outside air inlet port which attached the 1st filter. It is an expanded sectional view of the hot air discharge port which attached the 2nd filter. It is sectional drawing of the lighting fixture for 1 lamp type straight tube | pipe type LED lamps which showed the flow of the air in internal space. It is sectional drawing of the lighting fixture for 1 lamp type straight tube | pipe type LED lamps which provided the heat sink. It is the perspective view which showed the use condition of the lighting equipment for straight tube | pipe type LED lamps by a prior art. It is a disassembled perspective view of the lighting fixture for straight tube | pipe type LED lamps by a prior art.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the up-down direction in description of the following embodiment is described on the basis of the state which attached the lighting fixture for straight tube | pipe type LED lamps to the ceiling.

[Example 1]
FIG. 1A is a perspective view showing a usage state of a lighting device 100 for a two-lamp straight tube LED lamp according to this embodiment. FIG. 1B is a front view showing a usage state of the lighting device 100 for a two-lamp type straight tube LED lamp according to the present embodiment. In addition, in a present Example, let the figure seen from the bottom be a front view of the lighting fixture 100 for 2 lamp type straight tube | pipe type LED lamps. FIG. 2 is an exploded perspective view of a lighting device 100 for a two-lamp straight tube LED lamp according to this embodiment. The straight tube LED lamp lighting device 100 has a so-called inverted Fuji shape as represented by the outer shape of the case 101.

  The straight tube type LED lamp lighting fixture 100 has a power supply unit 103 fixed on the lower surface and two pairs of lamp sockets (power supply side lamp sockets 104a and 104b and ground side lamp sockets 105a and 105b) suspended at both ends. A longitudinal chassis 102 provided, a case 101 having an upper opening which is mounted on the lower surface of the chassis 102 so as to form a fixed space between the chassis 102, and between the power supply side lamp socket 104a and the earth side lamp socket 105a; Two straight tube LED lamps L are detachably mounted between the power supply side lamp socket 104b and the earth side lamp socket 105b. At least one hot air discharge port 122 is formed in the uppermost portion of the case 101 as much as possible. Further, at least one outside air inlet 121 is formed in the case 101 at a position below the hot air outlet 122.

  The chassis 102 has a long shape with a substantially U-shaped cross section with its lower surface opened, and has a pair of mounting bolt insertion holes C2 through which two mounting bolts C1 provided on the ceiling C are inserted. Forming. That is, when attaching the chassis 102 to the ceiling C, the attachment bolt C1 may be inserted into each of the pair of attachment bolt insertion holes C2 and tightened with the attachment nut C3.

  The power supply side lamp sockets 104a and 104b are formed with power supply side receivers 106a and 106b to which two substantially L-shaped power supply side caps L1 which are power supply terminals of the straight tube type LED lamp L shown in FIG. Yes. The power supply side receiving pieces 106a and 106b are connected to the power supply unit 103 via electric wires 127a and 127b. In the earth side lamp sockets 105a and 105b, earth side receivers 107a and 107b to which a substantially T-shaped earth side base L2 which is an earth terminal of the straight tube type LED lamp L shown in FIG. The ground-side receivers 107a and 107b are grounded via ground wires 128a and 128b.

  A power supply unit 103 is fixed on the lower surface side of the chassis 102, that is, on the open side of the chassis 102 having a substantially U-shaped cross section. In this embodiment, the power supply unit 103 is fixedly provided at a position near the power supply side lamp sockets 104a and 104b from the approximate center in the longitudinal direction of the chassis 102.

  3C is a cross-sectional view of the straight tube LED lamp L. FIG. The straight tube type LED lamp L includes a substrate L3 having a plurality of LED elements L4 mounted on the lower surface.

  The case 101 has a longitudinal shape with an inverted Fuji shape in cross section. The metal main plate 108 that covers the chassis 102 and two inverted Fuji-shaped metals that close both ends of the case 101 in the longitudinal direction. And an end plate 109 made of metal. The main plate 108 is formed with at least one outside air inlet 121 for sucking outside air inside the case 101 and at least one hot air outlet 122 for discharging hot air inside the case 101.

  A specific configuration of the case 101 in this embodiment will be described with reference to FIGS. 4 to 6B. FIG. 4 is a cross-sectional view taken along line AA of the lighting device 100 for a straight tube LED lamp shown in FIG. 1B. 5A to 5D are front views of the case 101 showing examples of the outside air inlet 121 formed in the case 101. FIG. In addition, in a present Example, let the figure seen from the downward direction on the basis of the state which attached the lighting fixture 100 for straight tube | pipe type LED lamps to the ceiling C as a front view of the case 101. FIG. 6A and 6B are side views in the longitudinal direction of the case 101 showing an example of the hot air outlet 122 formed in the case 101. FIG.

  As shown in the figure, the main plate 108 is formed by bending a single metal thin plate into an inverted Fuji shape in cross section. The lower end of the main plate 108 is bent in a substantially V shape at the lower end bent portion 108a, and two inclined surfaces 108b extending obliquely upward from the lower end bent portion 108a are formed. In this embodiment, these two slopes 108b serve as mounting surfaces for the straight tube LED lamp L, and when the straight tube LED lamp luminaire 100 is used, the straight tube LED is located below each of the two slopes 108b. The lamp L will be located. The main plate 108 is bent and extended vertically upward from the slope upper edge 108c of the two slopes 108b to form two side faces 108d. The upper side edge 108e of the two side surfaces 108d is formed with a return portion 108f formed by being bent in a substantially horizontal direction toward the inside of the case 101. The strength of the case 101 is strengthened and the case 108 is attached to the ceiling C. In this case, the return portion 108f is substantially in contact with the ceiling C.

  Near the both ends in the longitudinal direction of the two inclined surfaces 108b, two pairs of lamp socket insertion holes 110 having substantially the same shape as the cross sections of the power supply side lamp sockets 104a and 104b and the earth side lamp sockets 105a and 105b are formed. Forming. When the case 101 is attached to the chassis 102, the power supply side lamp sockets 104 a and 104 b and the earth side lamp sockets 105 a and 105 b are inserted through the lamp socket insertion holes 110 and protrude below the case 101.

  As shown in FIG. 2, the case 101 has a pair of screws provided in the vicinity of both ends of the chassis 102 by inserting screws 112 into a pair of screw insertion holes 111 provided in the vicinity of both ends of the lower end bent portion 108 a of the main plate 108. By screwing the screw 112 into the hole 113, the chassis 102 is attached from below. As a result, as shown in FIG. 4, a constant space is formed between the case 101 and the chassis 102, and an internal space 114 surrounded by the case 101 and the ceiling C is formed.

  At least one outside air inlet 121 for taking outside air into the internal space 114 is formed on the two inclined surfaces 108 b of the case 101. 5A to 5D are diagrams showing an example of the outside air inlet 121 formed in the case 101. FIG.

  In the example shown in FIG. 5A, a plurality of rectangular outside air inlets 121 having an equal interval a are formed on straight lines connecting the center portions of the two pairs of lamp socket insertion holes 110, respectively. In the example shown in FIG. 5B, a plurality of rectangular outside air inlets 121 having an equal interval a are formed on the straight lines connecting the lower edges of the two pairs of lamp socket insertion holes 110, respectively. In the example shown in FIG. 5C, a plurality of rectangular outside air inlets 121 having equal intervals a are formed on straight lines connecting the upper edge portions of the two pairs of lamp socket insertion holes 110, respectively. By forming the outside air inlet 121 on a straight line connecting the pair of lamp socket insertion holes 110 in this way, the outside air inlet 121 becomes a straight tube LED lamp L when the straight tube LED lamp luminaire 100 is used. It is in a hidden state and is preferable in terms of aesthetics.

  In the example shown in FIGS. 5A to 5C, the outside air inlet 121 has a size of at least 3 mm × 35 mm, and eight outside air inlets 121 are formed on each of the two inclined surfaces 108b. If the outside air inlet 121 is larger than 3 mm × 35 mm, the outside air can be efficiently taken into the internal space 114. In order to cool the power supply unit 103 more efficiently, it is preferable to increase the size of the outside air inlet 121 and to provide a larger number of outside air inlets 121 in the case 101.

  In the example shown in FIG. 5D, a plurality of rectangular outside air inlets 121 having equal intervals a are formed along the lower bent portion 108 a of the case 101. In this example, 8 mm 3 mm × 35 mm outside air inlets 121 having equal intervals a are formed at the lower end edges of the two inclined surfaces 108 b of the case 101. As a result, the respective outside air inlets 121 arranged symmetrically with respect to the lower end bent portion 108a are integrated with the lower end bent portion 108a, and a total of eight outside air inlet ports 121 are formed along the lower end bent portion 108a. Yes. By forming the outside air inlet 121 at the lowermost end of the case 101 in this manner, the outside air can be sucked into the inner space 114 and the hot air discharged from the inner space 114 can be discharged more efficiently. Details of air circulation in the internal space 114 will be described later.

  6A and 6B are views showing an example of the hot air outlet 122 formed in the case 101. FIG. As shown in the figure, at least one hot air discharge port 122 for discharging heat generated by the power supply unit 103 to the outside of the case 101 is formed at the uppermost part of the two side surfaces 108 d of the case 101.

  In the example shown in FIG. 6A, a plurality of rectangular hot air discharge ports 122 are formed as much as possible on the two side surfaces 108d. In the example shown in FIG. 6B, a plurality of notch-shaped rectangular hot air discharge ports 122 are formed at the side surface upper edge 108e of the two side surfaces 108d. In the example shown in FIGS. 6A and 6B, the hot air outlet 122 is at least 3 mm × 35 mm in size, and four hot air outlets 122 are formed on each of the two side surfaces 108d. If the size of the hot air discharge port 122 is larger than 3 mm × 35 mm, the hot air in the internal space 114 can be efficiently discharged to the outside of the case 101. In order to cool the power supply unit 103 more efficiently, it is preferable to increase the size of the hot air outlet 122 and to provide a larger number of hot air outlets 122 in the case 101.

  More hot air outlets 122 are formed in the vicinity of the power supply unit 103. That is, in the example shown in FIGS. 6A and 6B, one hot air outlet 122c, 122c ′ is formed at the center in the longitudinal direction of the side surface 108d, and the short side of the hot air outlet 122c, 122c ′ on the power supply unit 103 side is formed. Two hot air outlets 122a, 122b, 122a ', 122b' are formed at equal intervals b between the edge 108d1 on the side of the power supply unit 103 on the side surface 108d and the hot air outlets 122c, 122c. One hot air discharge port 122d, 122d ′ is formed with an equal interval c between the other short side 122c2, 122c2 ′ of the “′” and the other end edge 108d2 of the side surface 108d. 6A and 6B show only the hot air discharge port 122 formed on the side surface 108d on one side, but the hot air discharge port 122 is also located in the vicinity of the power supply unit 103 on the opposite side surface 108d (not shown). In, more are formed.

  The hot air discharge port 122 is formed in the uppermost part of the side surface 108d as much as possible because the natural air is caused by the temperature difference between the hot air in the internal space 114 and the external air outside the case 101. This is for discharging to the outside of 101. The details of the air flow when hot air is discharged from the internal space 114 to the outside will be described later.

  In this embodiment, the power supply unit 103 is fixed at a position near the power supply side lamp sockets 104a and 104b from the approximate center in the longitudinal direction of the chassis 102. However, the position where the power supply unit 103 is fixed may be changed as appropriate. May be. In that case, a larger number of hot air outlets 122 may be provided in the case 101 in the vicinity of the position where the power supply unit 103 is fixed.

  As shown in FIGS. 7A to 7G, filters may be attached to the outside air inlet 121 and the hot air outlet 122 in order to prevent dust floating in the outside air from entering the internal space 114 of the case 101. FIG. 7A is an enlarged view of the end portion of the case 101. 7B is an enlarged view of the outside air inlet 121, and FIG. 7C is an enlarged view of the outside air inlet 121 to which the first filter 123 is attached. FIG. 7D is an enlarged cross-sectional view of the outside air inlet 121 to which the first filter 123 is attached. FIG. 7E is an enlarged view of the hot air outlet 122, and FIG. 7F is an enlarged view of the hot air outlet 122 to which the second filter 124 is attached. FIG. 7G is an enlarged cross-sectional view of the hot air outlet 122 to which the second filter 124 is attached.

  The material of the first filter 123 and the second filter 124 is not particularly limited as long as external dust or the like can be prevented from entering the internal space 114 of the case 101. The first filter 123 and the second filter 124 may be made of the same material or different materials. For example, by using the second filter 124 having a mesh structure larger than the mesh structure of the first filter 123, the exhaust of hot air through the second filter 124 becomes smoother, and the power supply unit 103 is cooled more efficiently. It becomes possible.

  The first filter 123 and the second filter 124 are adhered to the outer peripheral surface 125, 126 of the outside air inlet 121 and the hot air outlet 122, respectively, using an epoxy resin or the like as an adhesive. The first filter 123 and the second filter 124 can be used to prevent dust and the like from entering the internal space 114 of the case 101. As a result, it is possible to prevent a short circuit of the electric circuit disposed in the case 101 and to provide a long-term maintenance-free straight tube type LED lamp lighting fixture. In addition, since the first filter 123 and the second filter 124 are attached from the outside of the case 101, thermal degradation of the first filter 123 and the second filter 124 and the epoxy resin can be prevented, and the first filter 123 and the second filter 124 can be prevented. It is easy to remove dust adhering to the second filter 124 and repair when the first filter 123 and the second filter 124 come off.

  When the straight LED lamp L is turned on, air flows in the internal space 114 due to heat generated from the power supply unit 103, and hot air is always discharged from the hot air discharge port 122 to the outside of the case 101. Is unlikely to enter the internal space 114 of the case 101 from the hot air outlet 122. However, since the movement of air in the internal space 114 hardly occurs when the straight tube LED lamp L is extinguished, dust or the like may enter the internal space 114 from the hot air outlet 122. By sticking the second filter 124 to the hot air discharge port 122, dust or the like can be prevented from entering the internal space 114 even when the straight tube LED lamp L is turned off.

  As a material for the first filter 123 and the second filter 124, a nonwoven fabric manufactured by a melt blown method may be used. The nonwoven fabric manufactured by this melt blown method has a network structure formed by laminating super fine fibers made of polypropylene. In addition, the nonwoven fabric is subjected to a process of charging static electricity, and is in a state where a certain amount of static charge is charged. Therefore, this nonwoven fabric has the effect of preventing the passage of dust and the like by the mesh structure of the ultrafine fibers, and also has the effect of adsorbing the dust and the like by static electricity, so that the passage of the dust and the like can be extremely effectively prevented. Is possible.

  FIG. 8A is a cross-sectional view of the luminaire 100 for a straight tube LED lamp according to this embodiment, and shows the flow of air in the internal space 114 when the luminaire 100 for a straight tube LED lamp is used. This figure shows a cross section at a position where the power supply unit 103, the outside air inlet 121, and the hot air outlet 122 exist on the same plane. In the figure, the arrow indicated by a dotted line represents the flow of outside air and the outside air sucked into the internal space 114, and the arrow indicated by a solid line represents the flow of hot air.

  It is considered that natural ventilation occurs due to a temperature difference between the internal space 114 and the outside of the case 101 when the straight tube LED lamp lighting device 100 is used. The natural ventilation amount due to the temperature difference is such that the opening area of the outside air inlet 121 and the hot air outlet 122 is large, the vertical distance between the center of the outside air inlet 121 and the hot air outlet 122 is large, and the temperature outside the internal space 114 and the case 101. The greater the difference, the greater. Therefore, by increasing the total opening area of the outside air inlet 121 and the hot air outlet 122 formed in the case 101 as much as possible, and by increasing the vertical distance between the centers of the outside air inlet 121 and the hot air outlet 122 as much as possible, The power supply unit 103 can be efficiently cooled by natural ventilation.

  As shown in the drawing, since the hot air generated by heating by the power supply unit 103 rises in the internal space 114 and is discharged from the hot air discharge port 122, the pressure in the internal space 114 decreases. As a result, outside air is drawn into the internal space 114 through the outside air inlet 121. When the straight tube type LED lamp lighting apparatus 100 according to the present embodiment is used, such a flow of air naturally occurs in the internal space 114. Therefore, the power supply unit 103 is efficiently cooled, and the temperature of the power supply unit 103 is increased. Can be suppressed. As a result, the service life of the power supply unit 103 is improved, and a long-term maintenance-free straight tube LED lamp lighting device 100 can be obtained.

  FIG. 8B is a cross-sectional view showing the flow of hot air discharge when the hot air discharge port 122 is formed in a cutout shape in the side surface upper edge 108e. In this way, by forming the hot air discharge port 122 in a cutout shape at the side surface upper edge 108e, the hot air flowing toward the hot air discharge port 122 in the vicinity of the ceiling C can be discharged to the outside of the case 101 more smoothly. it can.

  FIG. 8C is a cross-sectional view showing the flow of hot air discharge when the hot air guide 115 is formed in the hot air outlet lower edge 122x of the hot air outlet 122. FIG. The hot air guide 115 leaves the hot air outlet lower edge 122x without being cut when the hot air outlet 122 is opened on the side surface 108d, and the hot air outlet lower edge 122x faces the inner side of the case 101 in a predetermined manner. It is formed by bending at an angle α.

  The angle α formed between the side surface 108d and the hot air guide 115 is desirably 90 degrees or less. As shown in the figure, it is considered that the hot air in the internal space 114 is guided to the hot air guide 115 and discharged more smoothly by setting the angle α to 90 degrees or less. That is, the hot air generated by heating by the power supply unit 103 proceeds in the horizontal direction near the ceiling C toward the hot air outlet 122, hits the upper part of the side surface 108d, and changes the course downward, but then hits the hot air guide 115. It is thought that it is discharged smoothly to the outside. Further, by forming the hot air guide 115 at the hot air outlet 122, dust or the like can enter the case 101 from the hot air outlet 122 even when the second filter 124 is not provided at the hot air outlet 122. I can suppress entry.

  FIG. 9 shows the air flow in the internal space 114 when the heat sinks 116a and 116b are installed between the power supply side lamp socket 104a and the earth side lamp socket 105a and between the power supply side lamp socket 104b and the earth side lamp socket 105b. It is sectional drawing of the lighting equipment 100 for straight tube | pipe type LED lamps which showed the flow. The heat radiating plates 116a and 116b are made of a material such as aluminum having excellent thermal conductivity and heat dissipation, and the upper portion of the straight tube LED lamp L is formed as a shape along the curved surface of the straight tube LED lamp L as shown in FIG. The heat generated by the LED element L4 included in the straight tube LED lamp L is radiated as easily as possible through the heat radiation plates 116a and 116b. By providing such heat sinks 116a and 116b on the upper part of the straight tube LED lamp L, the air heated by the heat generated by the LED element L4 included in the straight tube LED lamp L is used. Ascending airflow of the outside air along the inclined surface 108b tends to be generated upward, and the intake of the outside air from the outside air intake port 121 to the internal space 114 and the discharge of the hot air of the internal space 114 from the hot air discharge port 122 are promoted. As a result, the power supply unit 103 can be cooled more effectively.

[Example 2]
FIG. 11A is a perspective view showing a usage state of a lighting device 200 for a single-lamp straight tube LED lamp according to this embodiment. FIG. 11B is a front view showing a use state of the lighting device 200 for a single-lamp straight tube LED lamp according to the present embodiment. In addition, in a present Example, let the figure seen from the bottom be the front view of the lighting fixture 200 for 1-lamp type straight tube | pipe type LED lamps. FIG. 12 is an exploded perspective view of the lighting device 200 for a single-lamp straight tube LED lamp according to this embodiment. The straight tube LED lamp lighting device 200 has a so-called inverted Fuji shape as represented by the outer shape of the case 201. The shape of the two-lamp type straight tube LED lamp lighting device 100 shown in the first embodiment is also referred to as a so-called inverted Fuji type based on the outer shape of the case 101. However, the case 101 and the case 201 are lower portions. The shape is slightly different.

  The straight tube type LED lamp lighting fixture 200 has a longitudinal chassis 202 in which a power supply unit 203 is fixed on a lower surface and a pair of lamp sockets (a power supply side lamp socket 204 and a ground side lamp socket 205) are vertically suspended at both ends. And a case 201 having an upper opening that is mounted on the lower surface of the chassis 202 so as to form a fixed space between the chassis 202 and a power supply side lamp socket 204 and a ground side lamp socket 205 that are detachably mounted. A tube-shaped LED lamp L. At least one hot air outlet 222 is formed in the upper part of the case 201 as much as possible. Further, at least one outside air inlet 221 is formed in the case 201 at a position below the hot air outlet 222.

  The chassis 202 has a longitudinal shape with a substantially U-shaped cross section with its lower surface opened, and a pair of mounting bolt insertion holes C12 through which two mounting bolts C11 provided on the ceiling C are inserted. Forming. That is, when attaching the chassis 202 to the ceiling C, the attachment bolt C11 is inserted into each of the pair of attachment bolt insertion holes C12 and tightened with the attachment nut C13.

  The power supply side lamp socket 204 is formed with a power supply side receiver 206 to which two substantially L-shaped power supply bases L1 which are power supply terminals of the straight tube LED lamp L shown in FIG. The power supply side receipt 206 is connected to the power supply unit 203 via the electric wire 227. The ground side lamp socket 205 is formed with a ground side receiver 207 to which a substantially T-shaped ground side base L2 which is a ground terminal of the straight tube type LED lamp L shown in FIG. The earth-side metal receiver 207 is grounded via the earth wire 228.

  A power supply unit 203 is fixed on the lower surface side of the chassis 202, that is, on the open side of the chassis 202 having a substantially U-shaped cross section. In this embodiment, the power supply unit 203 is fixed at a position near the power supply side lamp socket 204 from the approximate center in the longitudinal direction of the chassis 202.

  The case 201 has a longitudinal shape with an inverted Fuji shape in cross section, and is a metal longitudinal main plate 208 that covers the chassis 202 and two inverted Fuji-shaped metals that close both ends in the longitudinal direction of the case 201. And an end plate 209 made of metal. The main plate 208 is formed with at least one outside air inlet 221 for sucking outside air inside the case 201 and at least one hot air outlet 222 for discharging hot air inside the case 201.

  A specific configuration of the case 201 in the present embodiment will be described with reference to FIGS. 13 to 14C. FIG. 13 is a cross-sectional view taken along the line BB of the lighting device 200 for a straight tube LED lamp shown in FIG. 11B. 14A to 14C are front views of the case 201 showing an example of the outside air inlet 221 formed in the case 201. FIG. In addition, in a present Example, let the figure seen from the downward direction on the basis of the state which attached the lighting fixture 200 for straight tube | pipe type LED lamps to the ceiling C as a front view of the case 201. FIG.

  As shown in the drawing, the main plate 208 is formed by bending a single metal thin plate into a reverse Fuji shape. A lower portion of the main plate 208 forms a horizontal plane 208a, and two inclined surfaces 208b extending obliquely upward from both ends of the horizontal plane 208a are formed. In this embodiment, the horizontal plane 208a serves as a mounting surface for the straight tube LED lamp L, and when the straight tube LED lamp illuminator 200 is used, the straight tube LED lamp L is located below the horizontal surface 208a. It will be. The main plate 208 bends and extends vertically upward from the slope upper end edges 208c of the two slopes 208b to form two side faces 208d. On the upper side edges 208e of the two side surfaces 208d, a return portion 208f formed by bending in a substantially horizontal direction toward the inside of the case 201 is formed to reinforce the strength of the case 201 and attach it to the ceiling C. In this case, the return portion 208f is substantially in contact with the ceiling C.

  Near both ends in the longitudinal direction of the horizontal surface 208a, a pair of lamp socket insertion holes 210 having substantially the same shape as the cross sections of the power supply side lamp socket 204 and the earth side lamp socket 205 are formed. When the case 201 is attached to the chassis 202, the power supply side lamp socket 204 and the ground side lamp socket 205 are inserted through the lamp socket insertion hole 210 and protrude below the case 201.

  As shown in FIG. 12, the case 201 has a pair of screw holes 213 provided in the vicinity of both ends of the chassis 202 by inserting a screw 212 into each of a pair of screw insertion holes 211 provided in the vicinity of both ends of the horizontal surface 208 a of the main plate 208. The chassis 202 is attached so as to cover the chassis 202 from below by screwing the screw 212 into the screw. As a result, as shown in FIG. 13, a fixed space is formed between the case 201 and the chassis 202, and an internal space 214 surrounded by the case 201 and the ceiling C is formed.

  On the horizontal plane 208a of the case 201, at least one outside air inlet 221 for taking outside air into the internal space 214 is formed. 14A to 14C are diagrams illustrating examples of the outside air inlet 221 formed in the case 201. FIG.

  In the example shown in FIG. 14A, a plurality of rectangular outside air inlets 221 having equal intervals a are formed on a straight line connecting the center portions of the pair of lamp socket insertion holes 210 on the horizontal plane 208a. In the example shown in FIG. 14B, on the horizontal plane 208a, a plurality of rectangular outside air inlets 221 having an equal interval a are formed on straight lines connecting both ends of the pair of lamp socket insertion holes 210, respectively. In the example shown in FIG. 14C, a plurality of rectangular outside air inlets 221 having equal intervals a are formed along the lower edge of the inclined surface 208b. By forming the outside air inlet 221 in the lower part of the case 201 as described above, the outside air can be sucked into the inner space 214 and the hot air can be discharged from the inner space 214 more efficiently. That is, as explained in the first embodiment, it is considered that natural ventilation occurs due to a temperature difference between the internal space 214 and the outside of the case 201 even when the straight tube LED lamp lighting apparatus 200 is used. By increasing the vertical distance between the center of the port 221 and the hot air discharge port 222 as much as possible, the intake of the outside air into the internal space 214 and the discharge of the hot air from the internal space 214 can be performed more efficiently. Moreover, in the example shown to FIG. 14A and FIG. 14B, at the time of use of the lighting equipment 200 for a straight tube | pipe type LED lamp, the outside air inlet 221 will be in the state hidden in the straight tube | pipe type LED lamp L, and it is preferable on aesthetics.

  In the example shown in FIG. 14A, eight 6 mm × 35 mm outside air inlets 221 having equal intervals a are formed. As described in the first embodiment, the outside air suction port 221 may have a size of at least 3 mm × 35 mm. However, in this example, in order to secure a sufficient area for efficiently sucking outside air, the outside air suction port 221 is used. The mouth 221 has a size of 6 mm × 35 mm. In the example shown in FIGS. 14B and 14C, the outside air inlets 221 are at least 3 mm × 35 mm in size, and eight outside air inlets 221 are formed on the horizontal plane 208a.

  At least one hot air discharge port 222 for discharging the heat generated by the power supply unit 203 to the outside of the case 201 is formed in the upper part of the two side surfaces 208d of the case 201 as much as possible. In addition, since the pattern (formation position, formation of a hot air guide, etc.) and the characteristics of each method for forming the hot air outlet 222 are the same as the example described in the first embodiment, detailed description thereof is omitted here. To do.

  15A to 15C are diagrams showing examples of the case 201 in the case where the first filter 223 and the second filter 224 are attached to the outside air inlet 221 and the hot air outlet 222, respectively. 15A is an enlarged view of the end portion of the case 201, FIG. 15B is an enlarged sectional view of the outside air inlet 221, and FIG. 15C is an enlarged sectional view of the hot air outlet 222. As shown in the drawing, the outer peripheral surface 225 of the peripheral portion of the outside air inlet 221 and the hot air outlet 222 is made of epoxy resin or the like to prevent dust or the like floating in the outside air from entering the internal space 214 of the case 201. , 226 may be attached by attaching the first filter 223 and the second filter 224, respectively. The characteristics of the first filter 223 and the second filter 224 to be used and the method of attaching the first filter 223 and the second filter 224 to the outside air inlet 221 and the hot air outlet 222 are the same as those described in the first embodiment. Since this is the same, detailed description here is omitted.

  FIG. 16A is a cross-sectional view of the luminaire 200 for a straight tube LED lamp according to this embodiment, and shows the flow of air in the internal space 214 when the luminaire 200 for a straight tube LED lamp is used. This figure shows a cross section at a position where the power supply unit 203, the outside air inlet 221 and the hot air outlet 222 are on the same plane. In the figure, arrows indicated by dotted lines represent the flow of outside air and the outside air sucked into the internal space 214, and arrows indicated by solid lines indicate the flow of hot air.

  As in the case of Example 1, it is considered that natural ventilation occurs due to a temperature difference between the air in the internal space 214 and the air outside the case 201 when the straight tube LED lamp lighting device 200 is used. Accordingly, in the case of the straight tube type LED lamp lighting apparatus 200, the total opening area of the outside air inlet 221 and the hot air outlet 222 formed in the case 201 is made as large as possible, and the outside air inlet 221 and the hot air outlet 222 are By increasing the vertical distance between the centers as much as possible, the power supply unit 203 can be cooled more efficiently by natural ventilation.

  As shown in the drawing, since the hot air generated by heating by the power supply unit 203 rises in the internal space 214 and is discharged from the hot air discharge port 222, the pressure in the internal space 214 decreases. As a result, outside air is drawn into the internal space 214 through the outside air inlet 221. When the straight tube type LED lamp lighting apparatus 200 according to the present embodiment is used, such a flow of air naturally occurs in the internal space 214. Therefore, the power supply unit 203 is efficiently cooled, and the temperature of the power supply unit 203 is increased. Can be suppressed. As a result, the service life of the power supply unit 203 is extended, and a long-term maintenance-free straight tube LED lamp lighting device 200 can be obtained.

  FIG. 16B is a cross-sectional view of the luminaire 200 for a straight tube type LED lamp showing the flow of air in the internal space 214 when the heat sink 216 is installed between the power supply side lamp socket 204 and the earth side lamp socket 205. is there. The method of forming the heat sink 216 is the same as that in the first embodiment. By providing such a heat radiating plate 216 in the upper part of the straight tube LED lamp L, a slope is formed from above the straight tube LED lamp L by the air heated by the heat generated by the LED element L4 included in the straight tube LED lamp L. Ascending airflow of outside air along 208b is easily generated, and the intake of the outside air from the outside air intake port 221 to the internal space 214 and the discharge of the hot air of the internal space 214 from the hot air discharge port 222 are promoted. As a result, the power supply unit 203 can be cooled more effectively.

  As mentioned above, although embodiment of this invention was described in detail based on drawing, these are illustrations, Based on the knowledge of those skilled in the art, the form which changed various combinations, various deformation | transformation, improvement, etc. are shown. It is possible to implement the present invention in other forms. For example, the shape, size, position, number, and the like of the outside air inlets 121 and 221 and the hot air outlets 122 and 222 formed in the cases 101 and 201 are not limited to the configurations and combinations shown in the drawings. Modifications can be made as appropriate without departing from the spirit and technical idea described above.

100, 200 Lighting device for straight tube type LED lamp 101, 201 Case 102, 202 Chassis 103, 203 Power supply unit 104a, 104b, 204 Power supply side lamp socket 105a, 105b, 205 Earth side lamp socket 121, 221 Outside air inlet 122, 122a, 122a ′, 122b, 122b ′, 122c, 122c ′, 122d, 122d ′, 222 Hot air outlet 123, 223 First filter 125, 225 Outer peripheral edge outer surface 124, 224 Second filter 126, 226 Outer edge of hot air outlet L Straight tube LED lamp

Claims (3)

A long chassis with a power supply unit fixed on the bottom and lamp sockets suspended at both ends,
An upper opening case mounted on the lower surface of the chassis by forming a fixed space with the chassis;
A straight tube LED lamp detachably mounted between the lamp sockets;
With
A straight-tube LED lamp illuminator characterized in that a hot air discharge port is formed as much as possible in the case, and an outside air intake port is formed at a position below the hot air discharge port.   2. The lighting device for a straight tube type LED lamp according to claim 1, wherein the outside air suction port is closed by a first filter attached to an outer peripheral surface of the outside air suction port.   The said hot air discharge port was obstruct | occluded with the 2nd filter stuck on the peripheral part outer surface of the said hot air discharge port, The illuminating device for straight tube | pipe type LED lamps of Claim 1 or 2 characterized by the above-mentioned.

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