Lighting fixtures

Abstract

To provide a lighting fixture that can suppress excessive temperature rise in loads that receive power from a storage battery during inspection. [Solution] The lighting fixture 1 comprises a storage battery 11, a first load 13, a second load 14, and a control device 10 that charges the storage battery 11 with external power, supplies power from the storage battery 11 to the first load 13 in the event of a power outage, and supplies power from the storage battery 11 to the second load 14 when the storage battery 11 is being inspected. The volume of the second load 14 is larger than the volume of the first load 13.

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture.

Background Art

[0002] Patent Document 1 discloses a lighting device. In the lighting device of Patent Document 1, emergency power is supplied to a dummy load during inspection.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the lighting device described in Patent Document 1, when supplying emergency power to a dummy load, the temperature of the dummy load may rise excessively.

[0005] The present disclosure has been made to solve the above problems. An object of the present disclosure is to provide a lighting fixture capable of suppressing an excessive temperature rise of a load that receives power supply from a storage battery during inspection.

Means for Solving the Problems

[0006] The lighting fixture according to the present disclosure includes a storage battery, a first load, a second load, and a control device that charges the storage battery with external power, supplies power from the storage battery to the first load during a power outage, and supplies power from the storage battery to the second load during inspection of the storage battery. The volume of the second load is larger than the volume of the first load.

Effects of the Invention

[0007] According to the present disclosure, an excessive temperature rise of a load that receives power supply from a storage battery during inspection can be suppressed. [Brief explanation of the drawing]

[0008] [Figure 1] This figure shows the external appearance of the lighting fixture according to Embodiment 1. [Figure 2] This is an exploded perspective view of the lighting fixture according to Embodiment 1. [Figure 3] This diagram shows the configuration of the light source unit in the lighting fixture according to Embodiment 1. [Figure 4] This is a diagram illustrating the schematic configuration of the lighting fixture according to Embodiment 1. [Figure 5] This figure illustrates the modes that can be performed in the lighting fixture according to Embodiment 1. [Modes for carrying out the invention]

[0009] A detailed explanation follows with reference to the drawings. Repetitive explanations will be simplified or omitted as appropriate. In each drawing, the same reference numerals indicate the same or corresponding parts. Also, the size relationships of the components in the drawings may differ from those in reality. Furthermore, the forms of the components shown throughout the specification are merely examples and are not limited to those described in the specification. In particular, the combinations of components are not limited to those in each embodiment; components described in other embodiments can be applied to other embodiments.

[0010] Embodiment 1. Figure 1 shows the external appearance of the lighting fixture 1 according to Embodiment 1. Figure 2 is an exploded perspective view of the lighting fixture 1 according to Embodiment 1. Although not particularly limited, the lighting fixture 1 in Embodiment 1 will be described as an emergency lighting fixture that lights up in an emergency.

[0011] As shown in Figure 1, the lighting fixture 1 in Embodiment 1 comprises a main body 2, a frame 3, a lens 4, an inspection switch 5, an alert unit 6, a receiving unit 7, and a ceiling mounting spring 8. The main body 2 houses the equipment necessary for controlling the lighting fixture 1. The equipment housed inside the main body 2 will be described later. The frame 3 is a panel that covers the opening of the main body 2. The frame 3 is exposed to the room in the lighting fixture 1. The frame 3 has an opening. Through this opening, the lens 4, inspection switch 5, alert unit 6, and receiving unit 7 housed inside the main body 2 are exposed to the room. The lens 4 is attached to the light source unit 20. The lens 4 concentrates or diffuses the light emitted by the first load 13, which will be described later.

[0012] The inspection switch 5 is one or more switches operated by the user of the lighting fixture 1. The inspection switch 5 is used to check the remaining battery level of the storage battery 11, which will be described later. When the inspection switch 5 is operated, the lighting fixture 1 operates in various inspection modes, as will be described later.

[0013] The notification unit 6 provides notification based on a notification signal from the control device 10, which will be described later. In Embodiment 1, the notification unit 6 has an LED (light-emitting diode). The notification unit 6 provides notification by emitting light from the LED. One example of this notification is the illumination of the notification unit 6. In Embodiment 1, the notification unit 6 has an LED, but is not limited to an LED. The notification unit 6 may use light-emitting elements such as organic EL or semiconductor laser diodes. The display of the notification unit 6 may be, for example, a segment display. The notification unit 6 may also have a liquid crystal monitor or the like and provide notification by displaying characters, pictures, etc. The notification unit 6 may also provide notification by emitting sound. For example, a speaker may be provided and notification may be provided by emitting sound from the speaker.

[0014] The receiver 7 receives operation signals wirelessly from a terminal such as a remote controller (not shown). The receiver 7 transmits the received operation signals to the control device 10, which will be described later, so that the control device 10 can turn the lighting fixture 1 on and off. The ceiling mounting spring 8 is a mounting member for attaching the lighting fixture 1 to a mounting surface such as a ceiling. The ceiling mounting spring 8 is formed, for example, from sheet metal with a curved shape.

[0015] As shown in Figure 2, the lighting fixture 1 in Embodiment 1 has a power terminal block 9, a control device 10, a storage battery 11, a heat dissipation unit 12, a first load 13, a second load 14, and a mounting board 15 inside the main body 2. In Embodiment 1, the first load 13, the second load 14, the mounting board 15, and the heat dissipation unit 12 are collectively referred to as the light source unit 20. Power lines drawn from the outside are connected to the power terminal block 9, for example, through a power hole (not shown). The power terminal block 9 is a unit that supplies power from the commercial power supply 100 (described later) to each component of the lighting fixture 1. Under normal circumstances, power is supplied to the lighting fixture 1 from the commercial power supply 100.

[0016] The battery 11 is rechargeable and dischargeable, and serves as a backup power source when power is not supplied from the commercial power supply 100. The battery 11 is charged by external power, such as the commercial power supply 100. On the other hand, when power is not supplied from the commercial power supply 100, the battery 11 supplies power to each component of the lighting fixture 1. In Embodiment 1, the battery 11 is, for example, a Ni-MH battery. However, the battery 11 is not limited to, for example, a Ni-MH (nickel-metal hydride) battery. The battery 11 may also be a secondary battery such as a Ni-Cd (nickel-cadmium) battery or a Li-Ion (lithium-ion) battery. In the event of a power outage when power from the commercial power supply 100 is cut off, the control device 10 supplies power from the battery 11 to the first load 13. Also, when power is not supplied from the commercial power supply 100, such as during inspection of the battery 11, the control device 10 supplies power from the battery 11 to the second load 14.

[0017] FIG. 3 is a diagram showing the configuration of the light source unit 20 in the lighting fixture 1 according to the first embodiment. In FIG. 3, the first load 13, the second load 14, and the mounting substrate 15 are shown. The lighting fixture 1 in the first embodiment has a configuration in which the first load 13 and the second load 14 are mounted on the mounting substrate 15.

[0018] The first load 13 is a load that consumes power by receiving power supply from the storage battery 11 in an emergency. In the first embodiment, the light emitter that converts power into light is an example of the first load 13. The first load 13 emits light and lights up the lighting fixture 1. As described above, the lighting fixture 1 in the first embodiment is an emergency lighting fixture. Therefore, the first load 13 serves as an emergency light source that is powered by the storage battery 11 and lights up in an emergency when it does not receive power supply from the commercial power supply 100. When the first load 13 has, for example, an LED, the consumed power is converted into heat energy and light energy. Although the first load 13 has been described as having an LED, it is not limited thereto. The first load 13 may be, for example, an organic EL or a laser diode.

[0019] The second load 14 is a load for inspection that consumes power in place of the first load 13 during the inspection of the storage battery 11. According to the standard, the emergency lighting fixture is required to perform the inspection operation described in JIL5501:2019 (Emergency Lighting Fixture Technical Standard). In this inspection operation, power is supplied from the battery to light the light source of the emergency lighting fixture, and the voltage of the battery is detected when a specified period has elapsed since the start of lighting. In the inspection, it is determined whether the detected battery voltage is equal to or higher than the discharge reference voltage at which the light source of the emergency lighting fixture can be lit. The discharge reference voltage is a voltage at which lighting can be continued for a specified lighting duration or more. In the emergency lighting fixture, the specified lighting duration is 30 minutes or 60 minutes. The lighting duration in the lighting fixture 1 depends on the charge amount of the battery and the deterioration status of the battery. In the lighting fixture 1 according to Embodiment 1, the storage battery 11 is the battery. Also, the first load 13 corresponds to the light source. In this inspection operation, when the first load 13, which is the light source of the emergency lighting fixture, lights up, there is a possibility of giving people around a misunderstanding that it is an emergency. Therefore, during the inspection, it is preferable to supply power to the second load 14, which is a non-light-emitting load, and consume the power of the storage battery 11.

[0020] When the first load 13 is a light emitter, the second load 14 may be a load that consumes power without emitting visible light. That is, the second load 14 does not have to convert power into light. For example, when the second load 14 has a resistor, the consumed power is converted into heat. For example, a dummy load is an example of the second load 14. The dummy load is preferably a resistor having a specific heat capacity equivalent to that of the first load 13. Consider the case where the first load 13 is a light emitter and the power supplied from the storage battery 11 to the second load 14 is the same as the power supplied to the first load 13. In this case, since the amount of heat converted from the consumed power by the second load 14 increases, the temperature of the second load 14 and the peripheral devices will rise more than when power is supplied to the first load 13.

[0021] The heat dissipation section 12 is in contact with the mounting substrate 15 on which the first load 13 is mounted, and with the second load 14. The heat dissipation section 12 is a heat sink that dissipates the heat generated by the power consumption of the first load 13 and the second load 14. The heat dissipation section 12 basically has a capacity related to the amount of heat generated by the first load 13. The capacity of the heat dissipation section 12 may be, for example, a capacity corresponding to the amount of heat generated by the second load 14 during the inspection operation of the storage battery 11. Furthermore, by making the contact area between the heat dissipation section 12 and the second load 14 larger than the contact area between the heat dissipation section 12 and the mounting substrate 15, the heat dissipation effect on the second load 14 may be improved compared to the heat dissipation effect on the first load 13.

[0022] In the first embodiment, the light source unit 20 has a mounting substrate 15 on the surface of the heat dissipation unit 12. A second load 14 is located on the back surface of the heat dissipation unit 12. In the event of an emergency such as a power outage, the light source unit 20 consumes power from the battery 11 to light up the first load 13, causing it to generate heat. In an emergency, it is preferable that no power is supplied to the second load 14. On the other hand, during the battery 11 inspection operation, the second load 14 consumes power from the battery 11 and generates heat. In the inspection operation, it is preferable that no power is supplied to the first load 13. Furthermore, in an emergency such as a power outage, the inspection operation is not performed, and if a power outage occurs during the inspection operation, the inspection operation is stopped and the system switches to an emergency operation in which the first load 13 is lit. In this way, the timing of heat generation between the first load 13 and the second load 14 does not overlap, so the heat dissipation unit 12 can be shared between the first load 13 and the second load 14, thereby suppressing the need to increase the size of the lighting fixture.

[0023] Figure 4 is a diagram showing a schematic configuration of the lighting fixture 1 according to Embodiment 1. In Figure 4, the control device 10 is a device that controls the operation of turning the lighting fixture 1 on and off. The control device 10 is composed of hardware such as a microcomputer having a processing unit such as a CPU (Central Processing Unit). As shown in Figure 4, the control device 10 has a lighting circuit section 10A, a charging circuit section 10B, an inspection processing section 10C, and a timing section 10D. The lighting circuit section 10A performs lighting control related to turning the first load 13 on or off. The lighting circuit section 10A mainly performs function (3) described later. The charging circuit section 10B performs charging control when charging the storage battery 11 with power supplied from the commercial power supply 100. The charging circuit section 10B mainly performs function (1) described later. The inspection processing section 10C performs processing related to inspection control when executing various inspection functions described later. The inspection processing section 10C mainly performs functions (4) to (8) described later. The timing unit 10D has a timer and performs timing. The time measured by the timing unit 10D is used by the inspection processing unit 10C and other units when performing control. The timing unit 10D mainly performs the function (2) described later.

[0024] The control device 10 of Embodiment 1 has the following functions (1) to (8), and performs tasks such as turning the lighting fixture 1 on or off, charging the storage battery 11, and inspecting the storage battery 11. (1) A normal charging function that receives power from the commercial power supply 100 and normally charges the storage battery 11. Here, normal charging is performed by trickle charging, which charges the storage battery 11 by supplying a small current. (2) A timer function that measures the elapsed time since receiving power from commercial power supply 100. (3) A function that, if the power supply from commercial power source 100 is interrupted, switches to power supply from battery 11 to illuminate the first load 13 and light up the lighting fixture 1. (4) An inspection function to check whether the lighting fixture 1 can be lit for a specified time (20 minutes, 30 minutes, or 60 minutes) using the storage battery 11 and the deterioration status of the storage battery 11. Here, function (4) has two types of functions: one in which the inspection function is realized by making the first load 13 light up, and the other in which the inspection function is realized by making the second load 14 consume power. (5) An automatic inspection function that, when the inspection switch 5 is operated, illuminates the first load 13 using the storage battery 11 and performs the inspection of function (4). (6) A periodic automatic inspection function that, after a predetermined set inspection interval has elapsed due to the timer function of function (2), supplies power to the second load 14 by the storage battery 11, and automatically performs the inspection of function (4) without requiring operation of the inspection switch 5. (7) A manual inspection function that, while the inspection switch 5 is being operated, uses the storage battery 11 to illuminate the first load 13 and check whether the lighting fixture 1 can be lit. (8) A function that notifies the notification unit 6 of the inspection results performed based on functions (4) to (6).

[0025] Figure 5 is a diagram illustrating the modes that can be performed in the lighting fixture 1 according to Embodiment 1. The lighting fixture 1 in Embodiment 1 can perform four modes, for example: (a) normal lighting mode, (b) emergency lighting mode, (c) manual inspection mode, and (d) automatic inspection mode.

[0026] (a) The normal lighting mode is the mode under normal conditions. That is, when power is supplied from the commercial power supply 100. The lighting circuit section 10A of the control device 10 makes the first load 13 light up. The charging circuit section 10B of the control device 10 performs function (1) to charge the storage battery 11. In normal lighting mode (a), the storage battery 11 is charged, but no power is supplied from the storage battery 11 to the first load 13. In normal lighting mode (a), the control device 10 controls the storage battery 11 so that it is always fully charged.

[0027] (b) Emergency lighting mode is a mode for use in emergencies. An emergency, in this context, refers to a situation where the supply of power from the commercial power source 100 is interrupted, such as during a power outage. In emergency lighting mode (b), the lighting circuit section 10A of the control device 10 performs function (3) to cause the first load 13 to emit light and illuminate the lighting fixture 1. At this time, the storage battery 11 is discharged by the first load 13.

[0028] As mentioned above, in the normal lighting mode (a), the battery 11 is controlled to always be fully charged. However, as the battery 11 deteriorates, even when fully charged, the duration of illumination tends to shorten over time. Therefore, in an emergency, it is necessary to periodically check whether the lighting fixture 1 can illuminate for the specified time to confirm the deterioration status of the battery 11. If deterioration of the battery 11 is detected during the inspection, it is necessary to replace the battery 11 to maintain the lighting fixture 1 in a state where it can illuminate for the specified time. The following sections describe (c) manual inspection mode and (d) automatic inspection mode, respectively.

[0029] (c) The manual inspection mode is a mode in which an inspection is performed with the user's operation of the inspection switch 5 as the start condition for the inspection. In manual inspection mode, the control device 10 performs the automatic inspection function of function (5) or the manual inspection function of function (7) and provides notification of function (8). Although it is stated that the inspection is performed using the first load 13 in functions (5) and (7), the deterioration status of the storage battery 11 may also be checked using the second load 14.

[0030] (d) The automatic inspection mode is a mode in which an inspection is performed automatically as a condition for starting an inspection after the inspection interval has elapsed. The automatic inspection mode performs the periodic automatic inspection function of function (6) and provides notification of function (8). Here, the inspection interval time mentioned above is not specifically defined, but for example it could be 6 months or 1 year. The inspection interval time may be any other arbitrary time.

[0031] When the control device 10 performs an inspection in automatic inspection mode (d), emergency lighting fixtures that do not have a second load 14 will switch to an emergency lighting state and illuminate the first load 13. However, in this case, since the first load 13 illuminates during the inspection, people present at the installation site will notice that the lighting fixture 1 suddenly lights up. The illumination of the lighting fixture 1 may cause people present at the installation site to mistakenly perceive it as a power outage or some kind of malfunction. Therefore, it is preferable to have two loads, the first load 13 and the second load 14.

[0032] In the event of a power outage that results in emergency lighting mode (b), it is preferable that the control device 10 does not supply power from the battery 11 to the second load 14, but only to the first load 13. On the other hand, when inspecting the battery 11, it is preferable that the battery 11 does not supply power to the first load 13, but only to the second load 14.

[0033] The control device 10 sends a notification signal to the notification unit 6 based on the inspection results determined by the function (8) described above. The notification unit 6 displays the results based on the notification signal and informs the user of the inspection results.

[0034] Next, we will explain the temperature rise of the first load 13 and the second load 14 when the power supplied from the battery 11 to the first load 13 during an emergency and the power supplied from the battery 11 to the second load 14 during inspection operation are the same.

[0035] When the first load 13 is a light-emitting body, it converts the supplied power into light energy and thermal energy. On the other hand, when the second load 14 is a dummy load that does not emit light, the control device 10 converts the supplied power only into thermal energy. Therefore, when the power supplied by the storage battery 11 to the first load 13 during an emergency is equal to the power supplied by the storage battery 11 to the second load 14 during the inspection of the storage battery, and the first load 13 and the second load 14 have the same volume and the same specific heat, the second load 14 has a larger temperature rise amount. However, if the second load 14 excessively rises in temperature, the storage battery 11, which is a peripheral device, may deteriorate. When the storage battery 11 deteriorates, the lighting duration of the first load 13 tends to be shortened. Therefore, the lighting fixture 1 must be designed so that the second load 14 does not excessively rise in temperature. The temperature rise amount of the second load 14 must be within the design temperature value of the lighting fixture 1.

[0036] Hereinafter, the relationship between the volume of the load and the temperature rise amount will be described. Generally, thermal energy is calculated by the following S1 formula. Q (energy) = XCΔt = X (volume) × C (specific heat per unit volume) × Δt (temperature rise amount) ···S1 The above formula can be converted into the following S2 formula. Δt = Q / XC···S2 As described above, when the second load 14 is a dummy load, the specific heat per unit volume is the same as that of the first load 13. Also, as described in the previous paragraph, the energy converted into heat by the second load 14 is greater than the energy converted into heat by the first load 13. That is, when the energy converted into heat by the first load 13 is Q1 and the energy converted into heat by the second load 14 is Q2, Q1 < Q2. Therefore, from the S2 formula, in order to suppress the excessive temperature rise amount of the second load 14, at least the volume of the second load 14 needs to be larger than the volume of the first load 13.

[0037] Also, it is preferable that the temperature rise amount of the second load 14 when power is supplied from the storage battery 11 to the second load 14 is smaller than the temperature rise amount of the first load 13 when power is supplied from the storage battery 11 to the first load 13. Thereby, since the temperature of the second load 14 does not rise above the temperature of the first load 13, the capacity of the heat radiating part 12 can be reduced.

[0038] In order to make the temperature rise amount of the second load 14 smaller than the temperature rise amount of the first load 13, it is necessary that Q / XC of the first load 13 is larger than Q / XC of the second load 14. As described above, when the second load 14 is a pseudo load, the volumetric specific heat is equivalent to that of the first load 13 and Q1 < Q2. Therefore, in order to make the temperature rise amount of the second load 14 when power is supplied from the storage battery 11 to the second load 14 smaller than the temperature rise amount of the first load 13 when power is supplied from the storage battery 11 to the first load 13, the volume of the second load 14 needs to be Q2 / Q1 or more times larger than the volume of the first load 13.

[0039] For example, when 10 W of power is supplied to the first load 13 (volume: X1 mm 3 ), assume that out of the input power, 3 W is converted into light energy and 7 W is converted into heat energy. If the temperature rise amount (Δt) of the first load 13 is 70 °C, when the same power is applied to the second load 14 with the same specific heat and volume, Δt = 100 °C. In order to suppress the temperature rise of the second load 14 (volume: X2 mm 3 ) to 70 °C, it is necessary to have a volume as shown in the following formula. The left side represents the temperature rise amount of the first load 13, the right side represents the temperature rise amount of the second load 14, and the content in () represents the unit. 7 (W) / X1C ≧ 10 (W) / X2C X2 ≧ X1 × 10 / 7

[0040] In Embodiment 1, the inspection start condition for manual inspection mode (c) was described as operation of the inspection switch 5 by the user, but it is not limited to operation of the inspection switch 5. The inspection start condition for manual inspection mode (c) may be, for example, an operation signal sent from a terminal such as a remote controller (not shown). In this case, the receiving unit 7 receives the operation signal from the terminal.

[0041] Next, the effects of the lighting fixture 1 in Embodiment 1 will be described.

[0042] The lighting fixture 1 comprises a battery 11, a first load 13, a second load 14, and a control device 10. The control device 10 charges the battery 11 with external power, supplies power from the battery 11 to the first load 13 during a power outage, and supplies power from the battery 11 to the second load 14 when the battery 11 is being inspected. Furthermore, the volume of the second load 14 is larger than the volume of the first load 13. This helps to suppress excessive heat generation in the second load 14.

[0043] The second load 14 does not convert electricity into light. As a result, the lighting fixture 1 does not light up when the battery 11 is being inspected, thus minimizing the chance of misleading people nearby and allowing the inspection to be carried out safely.

[0044] The control device 10 does not supply power from the battery 11 to the second load 14 during a power outage, and does not supply power from the battery 11 to the first load 13 during inspection of the battery 11. As a result, the timing of heat generation between the first load 13 and the second load 14 does not overlap, allowing the heat dissipation unit 12 to be shared between the first load 13 and the second load 14, thereby suppressing the need to increase the size of the lighting fixtures.

[0045] When power is supplied from the battery 11 to the second load 14, the temperature rise of the second load 14 is less than or equal to the temperature rise of the first load 13 when power is supplied from the battery to the first load 13. As a result, the temperature of the second load 14 does not rise higher than or equal to the temperature of the first load 13, and therefore the capacity of the heat dissipation unit 12 can be reduced.

[0046] The volume of the second load 14 is more than Q2 / Q1 times larger than the volume of the first load 13. This prevents the temperature of the second load 14 from becoming higher than that of the first load 13.

[0047] The lighting fixture 1 has a heat dissipation part 12 that contacts a mounting substrate 15 on which a first load 13 is mounted and a second load 14. The contact area between the heat dissipation part 12 and the second load 14 is larger than the contact area between the heat dissipation part 12 and the mounting substrate 15. This makes it possible to improve the heat dissipation effect on the second load 14 compared to the heat dissipation effect on the first load 13.

[0048] The configurations shown in the embodiments described above are merely examples of the content of this disclosure and can be combined with other known technologies. Furthermore, it is possible to omit or modify parts of the configuration without departing from the gist of this disclosure.

[0049] Examples of aspects that may be included in this disclosure are listed below as an addendum.

[0050] [Note 1] Storage batteries and The first load and, The second load, A control device that charges the battery using external power, supplies power from the battery to the first load during a power outage, and supplies power from the battery to the second load during battery inspection, Equipped with, A lighting fixture in which the volume of the second load is greater than the volume of the first load. [Note 2] The first load is a lighting fixture as described in Appendix 1, which is a light-emitting device that converts electricity into light. [Note 3] The second load is a resistor, as described in Appendix 1 or 2 of the lighting fixture. [Note 4] The first load is an LED, The second load is a dummy load having a specific heat capacity equivalent to that of the first load, and is a lighting fixture as described in any one of the appendices 1 to 3. [Note 5] The aforementioned second load is a lighting fixture described in any one of the appendices 1 to 4 that does not convert electricity into light. [Note 6] The lighting fixture described in any one of the appendices 1 to 5, wherein the control device does not supply power from the battery to the second load during a power outage, and does not supply power from the battery to the first load during battery inspection. [Note 7] A lighting fixture according to any one of the appendices 1 to 6, wherein the temperature rise of the second load when power is supplied from the storage battery to the second load is smaller than the temperature rise of the first load when power is supplied from the storage battery to the first load. [Note 8] Of the power supplied from the battery to the first load, the energy converted into heat by the first load is Q1. Of the power supplied from the battery to the second load, the energy converted into heat by the second load is Q2. In that case, A lighting fixture according to any one of the appendices 1 to 7, wherein the volume of the second load is at least Q2 / Q1 times larger than the volume of the first load. [Note 9] The mounting substrate on which the first load is mounted and the heat dissipation portion that comes into contact with the second load, The lighting fixture according to any one of the appendices 1 to 8, wherein the contact area between the heat dissipation part and the second load is greater than the contact area between the heat dissipation part and the mounting substrate. [Explanation of Symbols]

[0051] 1 Lighting fixture, 2 Main unit, 3 Frame, 4 Lens, 5 Inspection switch, 6 Notification unit, 7 Receiving unit, 8 Ceiling mounting spring, 9 Power terminal block, 10 Control device, 10A Lighting circuit unit, 10B Charging circuit unit, 10C Inspection processing unit, 10D Timing unit, 11 Storage battery, 12 Heat dissipation unit, 13 First load, 14 Second load, 15 Mounting board, 20 Light source unit, 100 Commercial power supply

Claims

1. Storage batteries and The first load and, The second load, A control device that charges the battery using external power, supplies power from the battery to the first load during a power outage, and supplies power from the battery to the second load during battery inspection, Equipped with, A lighting fixture in which the volume of the second load is greater than the volume of the first load.

2. The lighting fixture according to claim 1, wherein the first load is a light-emitting body that converts electricity into light.

3. The lighting fixture according to claim 1 or 2, wherein the second load is a resistor.

4. The first load is an LED, The lighting fixture according to claim 1 or 2, wherein the second load is a pseudo-load having a specific heat capacity equivalent to that of the first load.

5. The lighting fixture according to claim 1 or 2, wherein the second load does not convert electricity into light.

6. The lighting fixture according to claim 1 or 2, wherein the control device does not supply power from the battery to the second load during a power outage, and does not supply power from the battery to the first load during battery inspection.

7. The lighting fixture according to claim 1 or 2, wherein the temperature rise of the second load when power is supplied from the storage battery to the second load is smaller than the temperature rise of the first load when power is supplied from the storage battery to the first load.

8. Of the power supplied from the battery to the first load, the energy converted into heat by the first load is Q1. Of the power supplied from the battery to the second load, the energy converted into heat by the second load is Q2. In that case, The lighting fixture according to claim 1 or 2, wherein the volume of the second load is at least Q2 / Q1 times larger than the volume of the first load.

9. The mounting substrate on which the first load is mounted and the heat dissipation portion that comes into contact with the second load, The lighting fixture according to claim 1 or 2, wherein the contact area between the heat dissipation portion and the second load is greater than the contact area between the heat dissipation portion and the mounting substrate.

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