CN217329736U

CN217329736U - Lighting device

Info

Publication number: CN217329736U
Application number: CN202090000601.1U
Authority: CN
Inventors: 中野贵之; 北野博史
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2019-06-25
Filing date: 2020-06-02
Publication date: 2022-08-30
Anticipated expiration: 2030-06-02
Also published as: TWI725878B; JP7291884B2; WO2020261897A1; JP2021005444A; TW202100906A

Abstract

An illumination device (100) embedded in a partition (10) that divides a first space (11) and a second space (12) different from the first space (11), the illumination device comprising: a light source unit (120); a cooling mechanism (140) that generates an air flow for cooling the light source unit (120); and a box body (110) for accommodating the light source part (120) and the cooling mechanism (140), wherein the box body is arranged in the second space (12) and is installed on the ceiling plate (10) in a mode of emitting the light from the light source part (120) to the first space (11); the box (110) is provided with: an air inlet (102) for sucking external air by an airflow generated by the cooling means (140) and an air outlet (103) for discharging the airflow are provided, and the air inlet (102) is disposed at a position facing the first space (11).

Description

Lighting device

Technical Field

The utility model relates to a lighting device.

Background

Conventionally, there is an illumination system that performs spatial expression using a projector as a light projection device instead of an illumination device (lamp). In such an illumination system, the light projection device is set in a state of being suspended from a ceiling, for example.

Documents of the prior art

Patent literature

Patent document 1: japanese laid-open patent publication No. 2016-161882

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

In recent years, in order to improve the aesthetic appearance of an illumination space, it has been studied to embed an illumination device (light projection device) in a partition (e.g., a ceiling, a floor, a wall, etc.) that partitions the illumination space. In a building, a space (for example, a ceiling rear surface, a floor surface, and a wall rear surface) on the opposite side of the illumination space partitioned by the partitioned area is a closed space, and therefore, more dust is present than in the illumination space.

Here, although the lighting device is provided with a cooling mechanism for sucking and exhausting outside air, if the lighting device is embedded in the partition body, dust is taken in by sucking air from the closed space, and the possibility of deterioration of the quality of the lighting device increases.

An object of the present invention is to provide a lighting device which can suppress the suction of dust from a closed space even if the lighting device is buried in a partition body, and can maintain the quality of the lighting device for a long period of time.

Means for solving the problems

In accordance with an aspect of the present invention, there is provided an illumination device embedded in a partition dividing a first space and a second space different from the first space, the illumination device including: a light source unit; a cooling mechanism for generating air flow for cooling the light source part; and a housing accommodating the light source unit and the cooling mechanism, the housing being attached to the partition body in a state of being disposed in the second space so that light from the light source unit is emitted to the first space, the housing having an air inlet for sucking external air by an air flow generated by the cooling mechanism and an air outlet for exhausting the air flow; the air inlet is disposed at a position facing the first space.

Effect of the utility model

According to the lighting device of the present invention, even if the lighting device is embedded in the partitioning body, suction of dust from the closed space can be suppressed, and the quality of the lighting device can be maintained for a long period of time.

Drawings

Fig. 1 is a sectional view showing a schematic configuration of an illumination device according to an embodiment.

Fig. 2 is a block diagram showing a control configuration of the lighting device according to the embodiment.

Fig. 3 is a sectional view showing a schematic configuration of the illumination device according to modification 1.

Fig. 4 is a cross-sectional view showing a schematic configuration of an illumination device according to modification 2.

Fig. 5 is a cross-sectional view showing a schematic configuration of an illumination device according to modification 3.

Fig. 6 is a cross-sectional view showing a schematic configuration of an illumination device according to modification 4.

Description of the reference numerals

10 ceiling panels (partitions); 10c wall panels (partitions); 10d floor (compartment); 11 a first space; 12. 12c, 12d second space; 100. 100A, 100B, 100C, 100D lighting devices; 102 air suction port; 103 an exhaust port; 104 a first filter; 105 a second filter; 107 second exhaust port; 108 a third filter; 110. 110a, 110b boxes; 120 light source part; 130 picture elements; 140 a cooling mechanism; 141 a first fan; 142 a second fan; 150 an air intake passage; 160 an exhaust passage; 180 second exhaust passage.

Detailed Description

Hereinafter, a lighting device according to an embodiment of the present invention will be described with reference to the drawings. The embodiments described below are all preferred specific examples of the present invention. Accordingly, the numerical values, shapes, materials, components, arrangement of components, connection modes, and the like shown in the following embodiments are examples, and the present invention is not limited thereto. Accordingly, among the components of the following embodiments, those not recited in the independent claims indicating the most generic concept of the present invention will be described as arbitrary components.

The drawings are schematic and are not necessarily strictly illustrated. In the drawings, the same components are denoted by the same reference numerals.

[ embodiment ]

Hereinafter, embodiments will be described. First, a usage mode of the lighting device according to the embodiment will be described. Fig. 1 is a sectional view showing a schematic configuration of an illumination device according to an embodiment. As shown in fig. 1, the lighting device 100 is installed in a ceiling panel 10 in a building. The ceiling panel 10 is an example of a partition that partitions a first space 11, which is a living space, and a second space 12, which is a ceiling rear surface of a building. The second space 12 is normally a closed space in a closed state. Therefore, the second space 12 is a space that is difficult to clean and in which dust and the like easily accumulate.

The lighting device 100 is fitted and fixed to an opening 13 provided in the ceiling plate 10. The light irradiation surface 101 of the illumination device 100 is exposed from the surface (the main surface on the first space 11 side) of the ceiling plate 10. Further, most of the lighting device 100 is disposed in the second space 12.

Next, the structure of the illumination device 100 will be described. The illumination device 100 includes a housing 110, a light source unit 120, an image element 130, a cooling mechanism 140, an intake duct 150, and an exhaust duct 160.

The housing 110 houses the light source unit 120, the cooling mechanism 140, the image element 130, the air intake passage 150, and the air exhaust passage 160. The case 110 is, for example, a substantially rectangular parallelepiped resin-made or metal-made case. One surface of the case 110 is a light irradiation surface 101, and light is irradiated from the light irradiation surface 101. Specifically, the projection lens 111 is embedded in a part of the light irradiation surface 101, and light is irradiated downward from the projection lens 111 (see the two-dot chain line in fig. 1). The irradiation direction of the light from the projection lens 111 may be a direction intersecting the light irradiation surface 101.

Further, an air inlet 102 and an air outlet 103 are formed in a part of the light irradiation surface 101. Specifically, the air inlet 102 and the air outlet 103 are arranged so as to sandwich the projection lens 111 in cross section. The intake port 102 and the exhaust port 103 are disposed at positions facing the first space 11.

The entire air inlet 102 is covered with a replaceable first filter 104. The entire exhaust port 103 is covered with a replaceable second filter 105. The portion of the case 110 other than the inlet port 102 and the outlet port 103 is sealed so that the interior and exterior of the case 110 cannot be ventilated from the portion other than the inlet port 102 and the outlet port 103.

The first filter 104 is a dust collecting filter that removes dust and oil that enter the casing 110 through the air inlet 102. The second filter 105 is a dust collecting filter that removes dust and oil that enter the case 110 through the exhaust port 103.

The light source unit 120 irradiates light to the image element 130. Examples of the light source provided in the light source section 120 include a mercury lamp, an led (light Emitting diode), and an ld (laser diode). In any light source, the temperature is high because the light is a heat source at the time of irradiation. The light source unit 120 may include a plurality of light sources that emit red light, blue light, and green light, respectively. The light source section 120 may have a light source of only one color light and a phosphor wheel for converting the color light emitted from the light source into a different color light.

The image element 130 is an element that forms a projection image by light from the light source unit 120. Examples of the image element 130 include a transmissive liquid crystal element, a reflective liquid crystal element, and a dmd (digital Micromirror device). In fig. 1, the image element 130 is illustrated as a reflective liquid crystal element or a DMD. The image element 130 also serves as a heat source during driving, and has a high temperature.

In the present embodiment, although not shown, an optical system for guiding light emitted from the light source unit 120 to the image element 130 and an optical system for guiding light reflected by the image element 130 to the projection lens 111 are provided in the housing 110.

The cooling mechanism 140 is a mechanism for cooling the heat source (the light source unit 120, the image element 130, and the like) in the housing 110. Specifically, the cooling mechanism 140 includes a first fan 141 and a second fan 142. The first fan 141 is disposed in the housing 110 in the vicinity of the inlet 102. The first fan 141 is driven to rotate, and draws air in the first space 11 into the casing 110 through the air inlet 102. The second fan 142 is disposed in the vicinity of the exhaust port 103 in the case 110. The second fan 142 is rotationally driven to discharge air in the casing 110 from the air outlet 103 toward the first space 11. In fig. 1, the airflows that the first and

second fans

141 and 142 are driven to generate within the case 110 are indicated by dotted arrows. Since the light source unit 120 and the image element 130 are arranged along the air flow, the light source unit 120 and the image element 130 can be efficiently cooled by only one air flow generated by the cooling mechanism 140. In particular, since the light source unit 120 having a large amount of heat generation is disposed upstream of the image element 130, the light source unit 120 can be efficiently cooled by the air just taken in from the first space 11.

The intake passage 150 is a passage made of, for example, metal or resin and disposed in the case 110. The air intake passage 150 guides the air flow generated by the cooling mechanism 140 from the air intake port 102 to the light source unit 120. Specifically, one end of the air intake duct 150 is disposed in the vicinity of the air inlet 102 so as to surround the air inlet 102, and the other end of the air intake duct 150 is disposed in the vicinity of the light source unit 120. The first fan 141 is accommodated in the air intake passage 150. This enables the airflow generated by driving the first fan 141 to reliably pass through the air intake duct 150.

The exhaust duct 160 is, for example, a metal or resin duct disposed in the case 110. The exhaust passage 160 guides the airflow generated by the cooling mechanism 140 to the exhaust port 103. Specifically, one end of the exhaust duct 160 is disposed near the picture element 130 as a heat source, and the other end of the exhaust duct 160 is disposed near the exhaust port 103 so as to surround the exhaust port 103. The second fan 142 is accommodated in the exhaust duct 160. This enables the airflow generated by driving the second fan 142 to reliably pass through the exhaust duct 160.

Fig. 2 is a block diagram showing a control configuration of the lighting device according to the embodiment. As shown in fig. 2, the illumination device 100 includes a control unit 170 that controls the light source unit 120, the image element 130, and the cooling mechanism 140. The control unit 170 includes a CPU, a ROM, a RAM, and the like, and the CPU reads a program stored in the ROM and expands the program into the RAM to execute various processes. In the ROM, image data of an image formed by the image element 130 is stored in advance. The control unit 170 may acquire image data from an external device such as a smartphone, a PC, or a remote controller via the communication unit 190.

When the power is turned on, the control unit 170 drives the light source unit 120, the image element 130, the first fan 141, and the second fan 142. Thus, light is irradiated from the projection lens 111 toward the first space 11 directly below the illumination device 100. Further, an air flow is generated from the air inlet 102 to the air outlet 103 in the case 110, and the light source unit 120 and the image element 130 are cooled. Further, if another heat source such as a circuit board or a power supply board on which the control unit 170 is mounted is also disposed in the flow path of the air flow caused by the cooling mechanism 140, the other heat source can be cooled effectively.

[ Effect and the like ]

As described above, according to the present embodiment, the lighting device 100 embedded in the ceiling plate 10 (partition) that partitions the first space 11 and the second space 12 different from the first space 11 includes: a light source unit 120; a cooling mechanism 140 that generates an air flow for cooling the light source unit 120; and a case 110 that houses the light source unit 120 and the cooling mechanism 140, the case 110 being attached to the ceiling plate 10 in a state in which the case 110 is disposed in the second space 12 so that light from the light source unit 120 is emitted to the first space 11, the case 110 including: an intake port 102 for taking in outside air by an airflow generated by the cooling mechanism 140 and an exhaust port 103 for exhausting the airflow; the air inlet 102 is disposed at a position facing the first space 11.

Thus, since the inlet port 102 is disposed at a position facing the first space 11, the external air can be taken into the casing 110 from the first space 11 through the inlet port 102. Since the first space 11 is a cleaner space than the second space 12, dust is not easily taken into the case 110. In this way, even if the lighting device 100 is embedded in the ceiling plate 10, it is possible to suppress dust from being sucked from the second space 12, which is a closed space. Therefore, the quality of the lighting device 100 can be maintained for a long period of time.

The second space 12, which is a closed space, may have a high temperature depending on the season. For example, when the second space 12 is a ceiling rear surface, a building environment of 60 to 70 ℃ is present in summer. However, if the air inlet 102 is disposed at a position facing the first space 11 as in the present embodiment, air can be taken into the case 110 from the first space 11, which is not at a higher temperature than the second space 12, and cooling can be performed efficiently.

The exhaust port 103 is disposed at a position opposite to the first space 11 and different from the air inlet 102.

Thus, since the exhaust port 103 is disposed at a position facing the first space 11, the air heated by the heat source in the case 110 can be exhausted to the first space 11. This can suppress heat from being trapped in the second space 12 by the exhaust gas. Further, since the exhaust port 103 is disposed at a position facing the first space 11, dust in the second space 12 can be prevented from entering the exhaust port 103 even when no airflow occurs during a stop or the like.

The lighting device 100 further includes a first filter 104 covering the air inlet 102.

Thus, since the suction port 102 is covered with the first filter 104, even if dust or oil is sucked from the suction port 102, the dust can be removed by the first filter 104. Therefore, dust entering the case 110 can be further suppressed, and the quality of the lighting device 100 can be maintained for a longer period of time.

The lighting device 100 further includes a second filter 105 covering the exhaust port 103.

Thus, since the exhaust port 103 is covered with the second filter 105, even if dust or oil enters from the exhaust port 103, the dust can be removed by the second filter 105. Therefore, dust entering the case 110 can be further suppressed, and the quality of the lighting device 100 can be maintained for a longer period of time.

The illumination device 100 further includes an image element 130, and the image element 130 is disposed in the housing 110 and forms an image by using the light from the light source unit 120 as a source.

Thus, the image element 130 forms an image by using the light from the light source unit 120 as a source, and thus illumination light of various forms can be realized. Further, although the image element 130 is also a heat source during driving, the image element 130 can also be cooled because an air flow is generated in the case 110 by the cooling mechanism 140. Since the structure is such that dust is hard to intrude into the case 110 as described above, dust is hard to adhere to the image element 130. Therefore, the quality of the picture element 130 can be maintained for a long period of time.

Further, lighting device 100 includes air intake duct 150, and air intake duct 150 is disposed in housing 110, and guides the air flow generated by cooling mechanism 140 from air intake port 102 to light source unit 120.

Thus, the air flow from the cooling mechanism 140 is guided from the air inlet 102 to the light source unit 120 by the air inlet passage 150, and therefore the light source unit 120 can be cooled smoothly. Therefore, the cooling efficiency can be further improved, and the quality of the illumination device 100 can be maintained for a longer period of time.

The lighting device 100 further includes an exhaust passage 160, and the exhaust passage 160 is disposed in the case 110 and guides the airflow generated by the cooling mechanism 140 to the exhaust port 103.

Accordingly, since the exhaust duct 160 guides the air flow from the cooling mechanism 140 to the exhaust port 103, the heated air can be smoothly discharged to the outside of the case 110. Therefore, heat is not easily confined in the case 110, and as a result, cooling efficiency can be further improved. Therefore, the quality of the illumination device 100 can be maintained for a longer period of time.

[ modification 1]

Next, modification 1 will be described. Modification 1 is different from the above-described embodiment in that a second exhaust port for exhausting the airflow generated by the cooling mechanism toward the second space is provided in the case. In the following description, the same parts as those of the illumination device 100 according to the above-described embodiment are given the same reference numerals, and the description thereof may be omitted.

Fig. 3 is a cross-sectional view showing a schematic configuration of the lighting device according to modification 1. As shown in fig. 3, a second air outlet 107 is provided in the case 110A of the lighting device 100A at a position facing the second space 12. Specifically, the second exhaust port 107 is disposed at a position facing the exhaust port 103 on the surface of the case 110a opposite to the light irradiation surface 101. The second exhaust port 107 may be disposed in any portion of the casing 110a as long as it is located opposite to the second space 12. The entire second exhaust port 107 is covered with a replaceable third filter 108.

Further, the illumination device 100A has a second air discharge passage 180. The second exhaust duct 180 is a duct made of, for example, metal or resin, and disposed in the case 110. The second exhaust passage 180 guides the airflow generated by the cooling mechanism 140 to the second exhaust port 107. Specifically, one end of the second exhaust duct 180 is disposed in the vicinity of the picture element 130 as a heat source, and the other end of the second exhaust duct 180 is disposed in the vicinity of the second exhaust port 107 so as to surround the second exhaust port 107. One end of the second exhaust passage 180 is disposed near one end of the exhaust passage 160. A second fan 142 is disposed on an upstream side of one end of the second exhaust duct 180 and one end of the exhaust duct 160. Thus, the airflow generated by the second fan 142 is branched into the exhaust duct 160 and the second exhaust duct 180, and is exhausted to the outside of the case 110a from the exhaust port 103 and the second exhaust port 107, respectively.

Thus, the case 110a has the second exhaust port 107, and the second exhaust port 107 exhausts the airflow generated by the cooling mechanism 140 toward the second space 12.

Accordingly, since the air is discharged from the second air outlet 107 toward the second space 12, the inside of the second space 12 can be ventilated with the heated air. Therefore, the humidity in the second space 12 can be reduced. That is, the heat source of the lighting device 100 can be cooled, and the humidity of the second space 12, which is a closed space, can be reduced, so that dew condensation and the like of the building can be suppressed. Even if condensation in a building is reduced, it is possible to suppress a failure of the lighting device 100A due to the condensation. Therefore, the quality of the illumination device 100A can be maintained for a long period of time.

The lighting device 100A further includes a third filter 108 covering the second exhaust port 107.

Thus, since the second exhaust port 107 is covered with the third filter 108, even if dust enters from the second exhaust port 107, the dust can be removed by the third filter 108. Therefore, dust entering the housing 110a can be further suppressed, and the quality of the lighting device 100 can be maintained for a longer period of time.

[ modification 2]

Next, modification 2 will be described. Modification 2 is different from modification 1 in that the exhaust port 103 and the exhaust duct 160 are removed from the illumination device 100A according to modification 1. In the following description, the same parts as those of the illumination device 100A according to modification 1 are given the same reference numerals, and the description thereof may be omitted.

Fig. 4 is a cross-sectional view showing a schematic configuration of an illumination device according to modification 2. As shown in fig. 4, in the case 110B of the illumination device 100B, the second air outlet 107 is provided at a position facing the second space 12, but an air outlet is not provided at a position facing the first space 11. Further, the second fan 142 is housed in the second exhaust passage 180. Therefore, the airflow generated by the driving of the second fan 142 can be reliably passed through the second exhaust passage 180.

Here, since the second air outlet 107 is provided above the heat source, even if the second fan 142 is not driven due to a trouble or the like, air can be smoothly discharged by convection. In addition, in the case of modification 2, since all the air flow in the case 110b is discharged from the second exhaust port 107, the ventilation effect with respect to the second space 12 as the closed space can be further improved.

[ modification 3]

Next, modification 3 will be described. Modification 3 is different from the embodiment in that the lighting device is attached to the wall plate. In the following description, the same parts as those of the illumination device 100 according to the above-described embodiment are given the same reference numerals, and the description thereof may be omitted.

Fig. 5 is a sectional view showing a schematic configuration of an illumination device according to modification 3. As shown in fig. 5, a lighting device 100C according to modification 3 is mounted on a wall panel 10C in a building. The wall panel 10c is an example of a partition that partitions a first space 11, which is a living space, and a second space 12c, which is an internal space of a wall of a building. The second space 12c is a closed space in a closed state in general. Therefore, the second space 12c is a space that is not easily cleaned and easily accumulates dust and the like.

The lighting device 100C is fitted and fixed to an opening 13C provided in the wall plate 10C. The light irradiation surface 101 of the illumination device 100C is exposed from the surface (main surface on the first space 11 side) of the wall plate 10C. Further, most of the lighting device 100C is disposed in the second space 12C.

In the illumination device 100C attached to the wall plate 10C, when the light source unit 120, the image element 130, the first fan 141, and the second fan 142 are driven under the control of the control unit 170, light is emitted from the projection lens 111 toward the first space 11 on the side of the illumination device 100C. Further, an air flow is generated from the air inlet 102 to the air outlet 103 in the case 110, and the light source unit 120 and the image element 130 are cooled. Here, since the inlet port 102 is disposed at a position facing the first space 11, the external air can be taken into the casing 110 from the first space 11 through the inlet port 102. Since the first space 11 is a cleaner space than the second space 12c, dust is not easily taken into the case 110. Thus, even if the lighting device 100C is embedded in the wall plate 10C, suction of dust from the second space 12C, which is a closed space, can be suppressed. Therefore, the quality of the illumination device 100C can be maintained for a long period of time.

In addition, other points can also be achieved by the lighting device 100C according to modification 3, which has the same operational effects as the lighting device 100 according to the above-described embodiment.

[ modification 4]

Next, modification 4 will be described. Modification 4 is different from the embodiment in that the lighting device is mounted on the floor. In the following description, the same parts as those of the illumination device 100 according to the above-described embodiment are given the same reference numerals, and the description thereof may be omitted.

Fig. 6 is a cross-sectional view showing a schematic configuration of an illumination device according to modification 4. As shown in fig. 6, an illumination device 100D according to modification 4 is installed on a floor 10D in a building. The floor 10d is an example of a partition that partitions a first space 11 as a living space and a second space 12d below the floor of a building. The second space 12d is a closed space in a closed state in general. Therefore, the second space 12d is a space in which cleaning is not easily performed and dust and the like are easily accumulated.

The lighting device 100D is fitted and fixed in an opening 13D provided in the floor panel 10D. The light irradiation surface 101 of the illumination device 100D is exposed from the surface (the main surface on the first space 11 side) of the floor 10D. Further, most of the lighting device 100D is disposed in the second space 12D.

In the lighting device 100D mounted on the floor 10D, when the light source unit 120, the image element 130, the first fan 141, and the second fan 142 are driven under the control of the control unit 170, light is irradiated from the projection lens 111 toward the first space 11 above the lighting device 100D. Further, an air flow is generated from the air inlet 102 to the air outlet 103 in the case 110, and the light source unit 120 and the image element 130 are cooled. Here, since the inlet port 102 is disposed at a position facing the first space 11, the external air can be taken into the casing 110 from the first space 11 through the inlet port 102. Since the first space 11 is a cleaner space than the second space 12d, dust is not easily taken into the case 110. In this way, even if the lighting device 100D is embedded in the floor 10D, it is possible to suppress dust from being sucked from the second space 12D, which is a closed space. Therefore, the quality of the illumination device 100D can be maintained for a long period of time.

In addition, other points can also be achieved by the lighting device 100D according to modification 4, which has the same operational effects as the lighting device 100 according to the above-described embodiment.

When the lighting device 100D is mounted on the floor 10D, the entire air inlet 102 and the entire air outlet 103 may be covered with the water blocking/ventilation sheet so that the liquid scattered on the floor 10D does not enter the air inlet 102 and the air outlet 103. In order to avoid the influence of a person or a pet walking on the floor 10d, the entire air inlet 102 and the air outlet 103 may be covered with a rigid mesh body having a plurality of through holes.

[ others ]

The lighting device according to the present invention has been described above based on the above-described embodiments and modifications, but the present invention is not limited to the above-described embodiments and modifications. For example, the present invention may be configured by combining the above-described embodiment and various modifications.

In the above embodiment, the illumination device 100 including the image element 130 is exemplified, but the illumination device may not include the image element.

In the above-described embodiment, the illumination device 100 including the first filter 104 and the second filter 105 is exemplified, but the illumination device may not include at least one of the first filter and the second filter.

In the above embodiment, the illumination device 100 including the air intake duct 150 and the air discharge duct 160 is exemplified, but the illumination device may not include at least one of the air intake duct 150 and the air discharge duct 160.

In the above embodiment, the case where the cooling mechanism 140 includes the first fan 141 and the second fan 142 is exemplified, but the number of fans included in the cooling mechanism may be at least 1. In the case where only one fan is provided, the fan is preferably disposed on the exhaust port side.

In the above embodiment, the case where the lighting device 100 is fitted into the opening 13 provided in the ceiling plate 10 is exemplified. The lighting device may be mounted on the ceiling plate. In this case, the ceiling plate may be provided with an opening portion for exposing the projection lens, the air inlet, and the air outlet.

In addition, the present invention includes a form obtained by applying various modifications to the embodiments as will occur to those skilled in the art, and a form obtained by arbitrarily combining the components and functions of the embodiments without departing from the scope of the present invention.

Claims

1. A lighting device embedded in a partition that partitions a first space and a second space different from the first space, the lighting device being characterized in that,

the disclosed device is provided with:

a light source unit;

a cooling mechanism for generating an air flow for cooling the light source unit; and

a case that accommodates the light source unit and the cooling mechanism, the case being attached to the partition body so that light from the light source unit is emitted to the first space in a state of being disposed in the second space;

the housing has an air inlet for sucking external air by the airflow generated by the cooling mechanism and an air outlet for exhausting the airflow,

the air inlet is arranged at a position opposite to the first space,

the light source unit is disposed at a position along the airflow.

2. The lighting device of claim 1,

the exhaust port is disposed at a position opposite to the first space and different from the intake port.

3. The lighting device of claim 1,

the air intake device includes a first filter covering the air intake port.

4. The lighting device of claim 1,

the second filter covers the exhaust port.

5. The lighting device of claim 1,

the image forming apparatus includes an image element disposed in the housing for forming an image based on light from the light source unit.

6. The lighting device of claim 1,

and an air intake passage disposed in the case and configured to guide an air flow generated by the cooling mechanism from the air intake port to the light source unit.

7. The illumination device of claim 1,

and an exhaust duct disposed in the case and configured to guide the airflow generated by the cooling mechanism to the exhaust port.

8. The illumination device of claim 1,

the case has a second air outlet for discharging the air flow generated by the cooling mechanism toward the second space.

9. The illumination device of claim 8,

and a third filter for covering the second exhaust port.

10. The lighting device of claim 1,

the air inlet and the air outlet are covered by a water-blocking air-permeable sheet.