JPH0722415U - Heat dissipation structure for lighting equipment - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A heat dissipation structure for a lighting fixture in which a ballast is housed by a heat flow of heat generated by a lamp so that a circuit block arranged above the lamp is less likely to be thermally adversely affected. I will provide a. [Structure] A lamp 1 and a circuit block 2 containing an electronic circuit
And below the circuit block 2, or
In a lighting fixture in which a lamp is installed near a lower portion, a first heat dissipation hole A1 is provided in a side surface portion of the circuit block 2 located above or near the upper portion of the lamp, and a second heat dissipation hole is provided at a position away from the upper portion of the lamp. By providing B1, the first heat dissipation hole A1 provided on the side surface of the circuit block 2 above the lamp becomes a negative pressure due to the rising heat flow due to the heat generation of the lamp 1, and the air inside the circuit block 2 flows out. Is promoted, and the heat dissipation performance of the circuit block 2 is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat dissipation structure for a lighting fixture.

[0002]

[Prior art]

 Examples of conventional lighting fixtures of the type in which a lighting fixture and a circuit block that is a ballast are formed separately as in an inverter type discharge lamp lighting device, and these fixtures are powered from a wiring duct Then, as shown in FIG. 10, they are composed of a lamp T and a circuit block S which is a ballast controlling lamp, and the lamp T is provided below the circuit block S with a supporting member. It is hung with C.

[0003]

[Problems to be solved by the device]

 In such a structure, the heat flow of heat generated by the lamp T directly heats the circuit block S, and a part of the heat flow flows into the circuit block S from the heat radiation holes D provided in the circuit block S. Therefore, a sufficient heat dissipation effect cannot be obtained, and eventually, if the temperature inside the circuit block S is reduced to a specified value or less, the size of the circuit block S must be increased. there were.

The present invention aims to improve the heat dissipation performance from the heat dissipation holes, reduce the temperature inside the circuit block, and eventually realize the miniaturization of the circuit block in such a lighting device. is there.

[0005]

[Means for Solving the Problems]

 The present invention is intended to solve such a problem, and is a lighting fixture including a lamp and a circuit block containing an electronic circuit, and the lamp being installed below or near the circuit block. In the above, the first heat dissipation hole is provided in the side surface portion of the circuit block above or near the lamp fixture, and the second heat dissipation hole is provided in a portion away from the lamp fixture above.

[0006]

[Action]

 Due to the rising heat flow caused by the heat generated by the lamp, negative pressure is generated near the heat dissipation holes on the side surface of the circuit block above the lamp, which promotes the outflow of air inside the circuit block and improves the heat dissipation performance of the circuit block. .

[0007]

【Example】

 FIG. 1 shows a first embodiment of the present invention, in which a heat dissipation structure of a lighting device includes a lamp 1, a circuit block 2 containing an electronic circuit, and a support for suspending the lamp 1 below the circuit block 2. The first heat dissipation hole A1 is provided on the side surface of the circuit block 2 above the lamp 1 and is located on the same side surface as the part away from the lamp top. The second heat radiating hole B1 is provided at substantially the same height as the heat radiating hole A1.

According to this embodiment, the rising heat flow due to the heat generated by the lamp rises along the side surface of the circuit block 2 in which the first heat dissipation hole A1 is installed, so that the vicinity of the first heat dissipation hole A1 is increased. A negative pressure condition occurs. For this reason, the outflow of air from the first heat dissipation hole A1 into the circuit block 2 is promoted, and at the same time, the influence of heat generated by the lamp from the second heat dissipation hole B1 toward the inner part of the circuit block 2 is reduced. The inflow of cold outside air that is not received is promoted. By these actions, the heat generated inside the circuit block is efficiently released, and the internal temperature of the circuit block can be reduced. In addition, since the second heat release hole B1 is provided at a position away from the upper part of the lamp, the rising hot air from the lamp is prevented from flowing in from the second heat release hole B1, and the heat dissipation performance is further improved. Will be improved.

FIG. 2 shows a second embodiment of the present invention, and the heat dissipation structure of the luminaire is similar to the first embodiment, that is, a lamp 1, a circuit block 2 having an electronic circuit built therein, and a support. In this embodiment, a first heat dissipation hole A2 is provided in the side surface above the lamp, and the first heat dissipation hole is located on the same side away from the lamp above. The second heat radiation hole B2 is provided at a position lower than A2.

According to the second embodiment, the ascending hot air flow generated by the heat generated by the lamp 1 causes the chimney effect in the first heat dissipation hole A2 to generate heat from the heat dissipation hole A2 inside the circuit block. Promote outflow. At the same time, the inflow of low-temperature external air from the second heat radiation hole B2 is promoted. Further, at this time, the rising heat flow due to the heat generation of the lamp rises along the side surface of the circuit block having the first heat dissipation hole A2, so that a negative pressure state is generated in the vicinity of the first heat dissipation hole A2. The outflow of air from the first heat dissipation hole A2 is further promoted. By this action, the heat generated inside the circuit block is efficiently dissipated, and the internal temperature of the circuit block can be reduced. .

FIG. 3 and FIG. 4 show a third embodiment of the present invention, in which the heat dissipation structure of the luminaire has a circuit in which the lamp 1 and an electronic circuit are incorporated as in the first and second embodiments. In this embodiment, the block 2 and the support 3 are provided. In this embodiment, the first heat dissipation hole A3 is provided on the upper side surface of the lamp 1 of the circuit block 2 and the lower surface of the circuit block 2 is provided. A second heat radiating hole B3 is provided at a position apart from the upper part of the lamp.

According to this embodiment, the heat generated inside the circuit block 2 is promoted to flow out from the first heat dissipation hole A3 due to a larger stack effect than that of the second embodiment, and other effects are obtained. This is similar to the case of the second embodiment.

FIG. 5 to FIG. 7 show a fourth embodiment of the present invention, in which the heat dissipation structure of the luminaire is such that the circuit block 2 is arranged vertically unlike the above-mentioned embodiments. In the present embodiment, the first heat dissipation hole A4 is provided above the side surface of the circuit block 2 which is above the lamp. A second heat dissipation hole B4 is provided below the side surface corresponding to the back surface of this side surface. Then, the lamp 1 is arranged at the lower end of the circuit block 2 obliquely below the side surface on the installation side of the first heat discharge hole A4 as shown in the figure.

According to the fourth embodiment, the heat generated inside the circuit block 2 becomes an ascending hot air flow and flows out of the circuit block 2 through the first heat dissipation hole A 4 installed in the upper portion. Be done. In this case, in this embodiment, since the circuit block 2 is arranged vertically, the distance between the upper first heat radiation hole A4 and the lower second heat radiation hole B4 can be set to the maximum. In addition, the maximum stack effect can be expected, and the outflow of the heat generated inside the circuit block 2 from the first heat dissipation hole A4 is greatly promoted.

Further, at this time, the rising heat flow generated by the heat generation of the lamp rises near the side surface on the side where the first heat dissipation hole A 4 is installed without contacting the circuit block 2, , The circuit block 2 is not directly heated, and a negative pressure is present in the vicinity of the first heat dissipation hole A4, so that the heat generated inside the circuit block 2 is further promoted to flow out from the first heat dissipation hole A4. To be done. By these synergistic effects, the heat generated inside the circuit block 2 is efficiently radiated, and the internal temperature of the circuit block can be reduced.

FIG. 8 and FIG. 9 show a fifth embodiment of the present invention, in which the heat dissipation structure of the luminaire is such that the circuit block 2 is arranged vertically like the fourth embodiment. In the present embodiment, the first heat dissipation hole A5 is located above the side surface adjacent to the side surface of the circuit block 2 which is above the lamp, and the other structures are the same as those in the fourth embodiment. Also in this embodiment, the same effect as in the fourth embodiment can be obtained.

[0017]

[Effect of device]

 According to the present invention corresponding to claim 1, as described above, the luminaire includes the lamp and the circuit block containing the electronic circuit, and the lamp is installed below or near the circuit block. In the above, since the first heat dissipation hole is provided in the side surface portion of the circuit block above or near the lamp fixture and the second heat dissipation hole is provided in a portion away from the lamp above, the rising heat flow due to the heat generation of the lamp fixture. As a result, negative pressure is generated in the vicinity of the heat dissipation hole provided on the side surface of the circuit block above the lamp, which promotes the outflow of air inside the circuit block and improves the heat dissipation performance of the circuit block.

Further, according to the present invention corresponding to claims 2 and 3, as described above, the lighting device and the circuit block including the electronic circuit are included, and the circuit block is provided below or below the circuit block. In a luminaire in which a lamp is installed in the vicinity, a first heat dissipation hole is provided on a side surface portion of the circuit block above or near the lamp, and the first heat dissipation portion is located away from above the lamp. Since the second heat dissipation hole is provided at a position not higher than the hole, the heat generated inside the circuit block due to the chimney effect can further flow out from the first heat dissipation hole.

[0019]

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a side view showing a second embodiment of the present invention.

FIG. 3 is a side view showing a third embodiment of the present invention.

FIG. 4 is a bottom view showing a third embodiment of the present invention.

FIG. 5 is a side view showing a fourth embodiment of the present invention.

FIG. 6 is a side view of the fourth embodiment of the present invention viewed from A in FIG. 5;

FIG. 7 is a side view showing the fourth embodiment of the present invention and viewed in the direction B in FIG.

FIG. 8 is a side view showing a fifth embodiment of the present invention.

FIG. 9 is a side view showing a fifth embodiment of the present invention and viewed in the direction B in FIG.

FIG. 10 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Lamp 1 2 Circuit block 3 Support tool A1 1st heat dissipation hole B1 2nd heat dissipation hole

Claims (3)

[Scope of utility model registration request] 1. A circuit block comprising a lamp, a circuit block containing an electronic circuit for turning on a light source of the lamp, and a support fixed to the circuit block to support the lamp below the circuit block. The heat dissipation structure of the lighting fixture, wherein the first heat dissipation hole is provided on the side surface portion located above or near the upper part of the lamp, and the second heat dissipation hole is provided at a position apart from above the lamp. 2. The heat dissipation structure for a lighting fixture according to claim 1, wherein the second heat dissipation hole is provided at a position not higher than the first heat dissipation hole. 3. The heat dissipation structure for a lighting fixture according to claim 1, wherein the first heat dissipation hole is provided at an uppermost side surface of the circuit block, and the second heat dissipation hole is provided at a lowermost side surface of the circuit block. .