JP2009281670A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator efficiently illuminating a whole a storage compartment by light of LED when lighting devices of the storage compartment is composed of the LED in use with a small heating value and small electric power consumption. <P>SOLUTION: The refrigerator is equipped with: the storage compartment for housing storage articles, opened to or shield from external space via an openable and closable door; one or a plurality of loading shelves for partitioning a plurality of housing spaces in the storage compartment with respect to a vertical direction; and the lighting devices with a plurality of light emitting diodes for illuminating the storage compartment arranged side by side in a vertical direction. In a plane in parallel with the loading shelf, an angle between an optical axis of the light emitting diode and a side wall is larger than 60 degrees, and the plurality of light emitting diodes of the lighting device are faced in a direction such that light of an optical axis direction of the light emitting diode is not directly incident on the loading shelves. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigerator. In particular, the present invention relates to lighting in a room or the like when the door of a refrigerator storage room is opened.

  Conventionally, incandescent light bulbs have been mainly used for lighting devices for storage door pockets provided in refrigerator storage rooms and doors. However, in recent years, light-emitting diodes that are advantageous in terms of heat generation and power consumption (hereafter, A device using LED) has been proposed.

  However, compared to incandescent bulbs, LEDs have a small light emitting area and strong directivity, so the irradiation range is narrow. Therefore, in order to effectively irradiate a wide storage room, it is necessary to provide a larger number of LEDs than incandescent light bulbs, and manufacturing costs tend to be high in order to ensure illuminance in the storage room equivalent to incandescent light bulbs.

Therefore, in order to compensate for the small light emitting area and the strength of directivity, there has been proposed an example in which an illumination device using LEDs is attached to the rear side (back side) of the storage room with an inclination (for example, a patent). Reference 1). Also, there has been proposed an example in which the light in the direction of the optical axis of the LED of the lighting device is attached so as to be incident on the front side of the loading shelf of the storage room and the front portion of the loading shelf is irradiated intensively (for example, , See Patent Document 2).
Japanese Patent No. 4055803 Japanese Patent No. 4054365

  For example, in the refrigerator of Patent Document 1 described above, the LED is caused to emit light toward the rear side of the storage room. Therefore, although the light by LED can be concentrated in a storage room, since the illumination intensity in the front side (door side) of a storage room decreases, the storage pocket provided in the door cannot be illuminated effectively. There was a problem.

  Moreover, in the refrigerator of patent document 2 mentioned above, light is concentrated on the front part of a loading shelf. On the other hand, since the illuminance on the rear side of the storage room decreases, the rear side of the storage room becomes dark. Further, the light with the highest luminous intensity in the optical axis direction hits the front edge of the stacking shelf. For this reason, there is a problem that the reflected light at the front edge of the stacking shelf becomes strong and the user feels dazzling.

  The present invention has been made in order to solve the above-described problems. When a lighting device for a storage room is configured using an LED that generates a small amount of heat and consumes a small amount of power, the storage room is made of LED light. It aims at obtaining the refrigerator which can illuminate the whole efficiently.

  In the refrigerator of the present invention, a storage room having a space for storing stored items that is opened or blocked from an external space via an openable / closable door, and the storage room is partitioned into a plurality of storage spaces in the vertical direction. And a lighting device in which a plurality of light emitting diodes for illuminating the storage chamber are arranged in the vertical direction at a position closer to the door than the stacking shelf on the side wall of the storage chamber. The angle between the optical axis of the light emitting diode and the side wall in a plane parallel to the stacking shelf is larger than 60 °, and the light of the light emitting diode in the direction of the optical axis is not directly incident on the stacking shelf. A light-emitting diode should be turned.

  According to the present invention, an illuminating device having a plurality of LEDs is provided on the left and right side surfaces of a refrigerator, for example, in a storage chamber, at a position closer to the front than the loading shelf, and the angle formed by the optical axis and the side surface of the light emitted by each LED In addition, since the light in the optical axis direction is not directly incident on the stacking shelf, the light in the optical axis direction of the LED does not directly hit the front edge of the stacking shelf. The glare can be reduced and high visibility in the storage chamber can be secured. Moreover, the direction of LED of an illuminating device does not face the back side of a store room, and it can also irradiate the door pocket etc. of the door in the front side.

Embodiment 1 FIG.
1 is a schematic sectional side view of a refrigerator 1 according to Embodiment 1 of the present invention. In the present embodiment, the refrigerator 1 is composed of a plurality of storage rooms such as the refrigerator compartment 2, the switching room 3, the vegetable compartment 4, and the freezer compartment 5 having a space for storing stored items (food, etc.). Moreover, it has a hinged door 6 (hereinafter referred to as a door 6) and a drawer-type door 7, and opens / closes the space between each room and the outside. Below, although the refrigerator compartment 2 which has the door 6, the loading shelf 8, etc. is demonstrated, it is not limited to this.

  Here, as shown in FIG. 1, the refrigerator 1 has a substantially rectangular parallelepiped shape, but based on the installation direction of the refrigerator 1, the front side surface having the door is the front surface, and the rear surface with respect to the front surface is the rear surface. And Further, the upper side (ceiling side) in FIG. 1 is the upper surface and the lower side (floor side) is the lower surface, and the other two surfaces are side surfaces (here, the left side is the left side and the right side is the right side as viewed from the front). . In the refrigerator compartment 2 that is opened and closed by the door 6, a plurality of stacking shelves 8 for loading storage items are arranged in parallel on the upper surface (lower surface) to partition the refrigerator compartment 2, and the stored items It is designed to improve the storage capacity. Further, the control means 100 controls each means constituting the refrigerator 1. Here, the control which concerns on LED9 which the illuminating device 10 for performing mainly the illumination in the refrigerator compartment 2 has is performed.

  FIG. 2 is a front view of the refrigerator compartment 2. As shown in FIG. 2, a plurality of LEDs 9 that emit visible light on a side surface portion (hereinafter, referred to as an inner wall 13) of the refrigerating chamber 2, such as white light, so that the user can visually recognize the stored item. Is installed. In the present embodiment, it is assumed that the lighting device 10 is provided on the inner wall 13 at a position on the front side (closer to the door 6) than the front edge of the stacking shelf 8. Further, in the vertical direction, the plurality of LEDs 9 included in the illumination device 10 are arranged so as to be positioned approximately in the middle of the two stacking shelves 8 (excluding the uppermost end and the lowermost end).

  FIG. 3 is a diagram showing the light emission characteristics of a general LED 9. As shown in FIG. 3, the LED 9 generally has a strong directivity of light related to light emission. Therefore, the luminous intensity is highest in the direction of the optical axis 12 perpendicular to the light emitting surface of the LED 9, and the luminous intensity decreases as the distance from the optical axis 12 increases. Here, the range irradiated with the luminous intensity of 50% or more with respect to the luminous intensity on the optical axis 12 is defined as the effective irradiation range α of the LED 9 (however, the light other than the effective irradiation range α is completely irradiated by the light emitted from the LED 9). Does not mean you can't do it). In FIG. 3, when the direction of the optical axis 12 is 0 °, ± about 50 ° is included in the effective irradiation range α. In addition, unless otherwise specified, the direction of the light related to the light emission of the LED 9 will be described below as representing the direction in a plane parallel to the loading shelf 8 (it is assumed that the light in the vertical direction is not defined). .

  FIG. 4 is a view of the refrigerator compartment 2 as viewed from above. As described above, the door 6 is installed on the front surface of the refrigerator compartment 2. In the refrigerator 1 of this embodiment, the front side of the refrigerator compartment 2 is connected to the main body of the refrigerator 1 by a hinge (not shown), and the space of the refrigerator compartment 2 is opened / shielded to the outside by so-called double door opening / closing. Doors 6A and 6B. Here, the door on the right side of the refrigerator 1 is referred to as the right door 6A, and the door on the left side is referred to as the left door 6B (explained as the door 6 when it is not particularly necessary to distinguish). Moreover, the door 6 has a door pocket 11 for food storage inside. Moreover, the illuminating device 10 is configured by providing a plurality of LEDs 9 on a printed circuit board 16 constituting an electric circuit. However, the printed circuit board 16 portion is not exposed in the refrigerator compartment 2. In the present embodiment, as shown in FIG. 4, the angle θ formed by the optical axis of the LED 9 with respect to the inner wall 13 is set to an angle larger than 60 °, and the light in the direction of the optical axis 12 of the LED 9 is loaded. The LED 9 is directed in a direction that does not directly enter the shelf 8 (particularly the front edge portion), and the lighting device 10 is attached. By making the angle θ larger than 60 °, when irradiating the entire stacking shelf 8, unevenness or the like can be eliminated and balanced irradiation can be performed. Here, for example, if the light in the direction of the optical axis 12 is incident on the loading shelf 8 even if the angle θ is larger than 60 °, there is no circumstance that the reflected light does not give the user glare. Basically, it is desirable to give priority to the direction in which the light in the direction of the optical axis 12 does not directly enter the loading shelf 8. Moreover, although there is no limitation about the upper limit of angle (theta), since it is mainly illuminating the inside of the refrigerator compartment 2, it is preferable that angle (theta) is 90 degrees or less.

  FIG. 5 is a top view of a conventional refrigerator compartment. In the conventional refrigerator, the angle of the LED with respect to the inner wall is set to 60 ° or less, and the light in the optical axis direction of the LED is directed toward the loading shelf 8, so that the light is concentrated on the rear side of the refrigerator compartment 2. Easy to be irradiated. Therefore, although the inside of the refrigerator compartment 2 can be illuminated brightly, since the light in the direction of the optical axis 12 by the LED 9 is directly incident on the loading shelf 8, the reflected light from the front edge of the loading shelf 8 is reflected by the refrigerator user. It is strongly incident on the eyes and feels dazzling. On the other hand, in the refrigerator 1 according to the present embodiment, the light emitted from the LED 9 in the direction of the optical axis 12 does not directly enter the stacking shelf 8, so that glare caused by reflection can be greatly reduced.

  Further, as described above, the LED 9 that is the light source of the illumination device 10 has high directivity, and light in the effective irradiation range α around the optical axis 12 is strongly irradiated. Here, when the angle θ formed by the direction of the optical axis 12 of the LED 9 with respect to the inner wall 13 is changed, the effective irradiation range α also changes in conjunction. In the conventional refrigerator as shown in FIG. 5, the angle θ of the optical axis 12 of the LED 9 with respect to the inner wall 13 is set to 60 ° or less so that the inside of the refrigerator compartment 2 is intensively irradiated. It is not included in the effective irradiation range α. For this reason, the door pocket 11 provided on the inside of the door 6 is lightly irradiated by the LED 9 and becomes dark. Since the door pocket 11 is a storage space that is very convenient for storing and taking out drinks, small items, etc., it is preferable that the door pocket 11 can be illuminated for the convenience of the user.

  Therefore, in the refrigerator 1 of the present embodiment, the angle θ formed by the optical axis 12 of the LED 9 with respect to the inner wall 13 is set to an angle larger than 60 °, so the door pocket 11 is included in the effective irradiation range α (on the extension line). be able to. Therefore, the LED 9 can illuminate the inside of the refrigerator compartment 2 and simultaneously illuminate the door pocket 11.

  As described above, according to the first embodiment, when the LED 9 that generates a small amount of heat and can save energy with low power consumption is used for illumination, the left and right inner walls 13 in the refrigerator compartment 2 of the refrigerator 1 are used. A lighting device 10 in which a plurality of LEDs 9 are arranged in the vertical direction is provided at a position on the front side (door 6 side) of the stacking shelf 8, and the angle formed by the optical axis 12 of the light emitted from each LED 9 and the inner wall 13 is set. It is assumed that the light in the direction of the optical axis 12 is not directly incident on the stacking rack 8 so that the light in the direction of the optical axis 12 of the LED 9 does not directly hit the front edge of the stacking rack 8 and is used. A person's glare can be reduced and the high visibility in the refrigerator compartment 2 can be ensured. Moreover, since the illuminating device 10 is not installed too inclined backward in the refrigerator compartment 2, the front pocket of the refrigerator compartment 2, ie, the door pocket 11 provided in the door 6, can also be irradiated. Therefore, for example, it is not necessary to provide a device for lighting the door pocket 11, which can contribute to cost reduction and energy saving.

Embodiment 2. FIG.
FIG. 6 is a view of the relationship between the illumination device 10 and the lamp cover (shade) 15 according to the second embodiment as viewed from the upper surface side of the refrigerator compartment 2. Also in this embodiment, the illumination device 10 has a configuration in which a plurality of LEDs 9 are provided on the printed circuit board 16. In the present embodiment, a recess 13A is formed on the inner wall 13 at a position ahead of the front edge of the stacking rack 8 (closer to the door 6), and the lighting device 10 is provided in the recess 13A. The concave portion 13A is covered with the lamp cover 15. However, the present invention is not limited to this, and the lamp cover 15 may cover the recess 13A without forming the recess 13A.

  The lamp cover 15 is formed of a resin made of a transparent material at least in the visible light range, and has a claw 14 or the like for fitting and fixing the lighting device 10 integrally. However, the fixing of the lighting device 10 is not limited to fitting the nail 14 or the like. The lamp cover 15 has a lens portion 15A for refracting incident light in part. In order to guide the incident light to the rear side (back side) of the refrigerator compartment 2, the lens portion 15 </ b> A is arranged so as to have an angle with respect to the inner wall 13.

  In the first embodiment described above, the direction of the LED 9 is defined with respect to the position where the lighting device 10 is provided, thereby reducing the glare of reflected light from the stacking shelf 8 and enabling the door pocket 11 to be illuminated. However, since the ratio of the effective irradiation range α of the LED 9 to the loading shelf 8 is small, there is a concern that the rear side of the refrigerator compartment 2 cannot be sufficiently illuminated. In order to compensate for the decrease in brightness in the refrigerator compartment 2, the number of LEDs 9 serving as a light source may be increased, but this is not preferable because it increases costs. Therefore, in the present embodiment, by using the lamp cover 15 having the lens portion 15A, the brightness of the entire refrigerator compartment 2 is further improved, and illumination of the refrigerator compartment 2 and the like is realized with an inexpensive configuration.

  FIG. 7 is a diagram showing changes in the light traveling direction of the LED 9 when the lamp cover 15 is used. As shown in FIG. 7A, in the lamp cover 15 of the present embodiment, the light incident on the lens portion 15A is refracted in the lens portion 15A, and in the effective irradiation range α on the rear side of the refrigerator compartment 2, Irradiate the area that cannot be covered. On the other hand, the light incident on the portion other than the lens portion 15A is almost straight and irradiates the door pocket 11 although there is some refraction depending on the incident angle. On the other hand, when the lamp cover 15 is not attached, or when the flat lamp cover 17 without the lens portion 15A is used, the LED goes straight as shown in FIG. To do.

  A part of the light of the LED 9 refracted by the lamp cover 15 is directed toward the stacking shelf 8. Therefore, there is a concern that glare is caused by direct incidence of light on the loading shelf 8. However, the primary optical axis 18 of the LED 9 is directly affected by a dispersion effect due to a difference in the direction of light such as attenuation of light intensity when passing through the lamp cover 15 and refraction of light due to roughness of the front and back surfaces of the resin-molded lamp cover 15. Compared with the case where the light enters the loading shelf 8, the glare is greatly reduced.

  FIG. 8 is a diagram showing the positional relationship between the LED 9 and the lamp cover 15. In particular, in the present embodiment, the positional relationship between the LED 9 and the lamp cover 15 is set such that light in the direction of the optical axis 12 enters the lens portion 15A and is guided to the rear side of the refrigerator compartment 2. When the lamp cover 15 that utilizes the light refraction of the LED 9 is used, the positional relationship between the effective irradiation range α of the LED 9 and the lamp cover 15 in the front-rear direction becomes very important. FIG. 8A shows a case where the LED 9 and the lamp cover 15 have an appropriate positional relationship. When an appropriate positional relationship is established, light in the direction of the optical axis 12 of the LED 9 is incident on the lens portion 15A of the lamp cover 15, and strong light is guided to the rear side of the refrigerator compartment 2. On the other hand, in the case shown in FIG. 8B, the light travels substantially straight without entering the lens portion 15A, and the light that should be effectively irradiated inside the refrigerator 2 is wasted.

  FIG. 9 is a diagram illustrating the relationship between the shape of the lamp cover 15 and the refraction of light. How much the light of the LED 9 can be refracted depends on the specification of the lens portion 15A. In order to easily increase the refraction angle when the lamp cover 15 shown in FIG. 9A is used as a reference, as shown in FIG. 9B, the lens portion 15A of the lamp cover 15 (refracts light). The thickness of the resin in the portion) should be increased. However, in general, if the thickness of the resin is increased too much, sink marks or the like are likely to occur, and it becomes difficult to mold the resin into a desired mold. Therefore, in order to avoid sink marks, as shown in FIG. 9 (c), the cross section of the lens portion 15A has a sawtooth shape (having a plurality of triangles), and is formed with the thick wall of FIG. 9 (b). A plurality of inclined surfaces may be formed. At this time, as shown in FIG. 9D, the greater the slope inclination, the smaller the incident angle of light in relation to the slope slope, and the greater the refraction. As described above, since the refraction angle varies depending on the inclination angle of the inclined surface, the lamp cover 15 having a desired lens portion 15A can be obtained by molding the inclined surface as necessary.

  FIG. 10 is a diagram showing the characteristics of the resin material. FIG. 10 shows the order of transmittance and material unit price among five types of resin materials. The higher the ranking (the smaller the number), the more advantageous it is. For example, acrylic and polycarbonate (polycarbonate) are advantageous in terms of high transmittance. Since the brightness in the refrigerator compartment 2 may be affected by the transmittance, it is necessary to select carefully. On the other hand, polystyrene (PS) resin, acrylonitrile and styrene copolymer compound (copolymer) resin (AS resin) are excellent in terms of unit price. Moreover, since it constitutes a part of the inner wall of the refrigerator compartment 2, it is necessary to consider oil resistance, corrosion resistance, and the like.

  FIG. 11 is a view showing a method of assembling the lighting device 10 to the refrigerator 1. For example, as shown in FIG. 11 (a), a claw 14 is provided in the recess 13A, the lighting device 10 is fitted into the claw 14 and directly assembled to the main body of the refrigerator 1, and the lamp cover 15 is attached to the lamp cover 15 as shown in FIG. 11 (b). There is a method of assembling the lighting device 10 to the main body of the refrigerator 1 after assembling. When the illumination device 10 is directly assembled in the recess 13A, the positional relationship between the LED 9 and the lamp cover 15 is greatly deviated due to variations during the assembly, and light in the effective irradiation range α of the LED 9 efficiently enters the lens unit 15A. There is concern about not doing it. On the other hand, when the illumination device 10 is assembled to the lamp cover 15 in advance, the positional relationship between the LED 9 and the lamp cover 15 does not greatly deviate, so that the light of the LED 9 is incident on the lens portion 15A with the preset positional relationship. Therefore, the illumination in the refrigerator compartment 2 by the lamp cover 15 can be pulled out to the maximum extent as desired. For this reason, it is preferable that the lighting device 10 is attached to the refrigerator 1 after being assembled to the lamp cover 15 in advance. Conversely, when the illuminating device 10 is directly assembled to the inner wall 13, it is necessary to make a structure capable of appropriately aligning the illuminating device 10 and the lamp cover 15 so as to eliminate the deviation. By assembling as described above, it is possible to improve the yield during production of the refrigerator 1.

  FIG. 12 is a diagram illustrating a shape example of the recess 13 </ b> A of the inner wall 13. For example, as shown in FIG. 12A, depending on the direction in which the LEDs 9 are arranged, part of the light may enter the recess 13 </ b> A of the inner wall 13 instead of the lamp cover 15. A part of the light incident on the recess 13A may continue to travel toward another part of the recess 13A, and the light may not come out of the lamp cover 15.

  Therefore, as shown in FIG. 12B, the concave surface that forms the concave portion 13A so that the light emitted from the LED 9 is reflected by the concave portion 13A and the reflected light does not further enter another portion of the concave portion 13A. By devising the angle, the light emitted from the LED 9 can be more effectively led to the outside of the lamp cover 15. In particular, since the light incident on the front side of the recess 13A is often completely wasted, the angle of the recess 13A is important in order to exit the lamp cover 15 without entering the recess 13A. . There is a door pocket 11 provided in the door 6 on the front side of the refrigerator compartment 2, and the light that has entered the outside of the lamp cover 15 without entering the recess 13 </ b> A irradiates the door pocket 11. In this way, if the concave portion 13A of the inner wall 13 is provided with an angle so that unnecessary light is guided to the outside of the lamp cover 15, efficient irradiation to the door pocket 11 provided on the entire surface of the refrigerator compartment 2 is achieved. Is possible.

  In addition, as described above, light is not emitted at all outside the effective irradiation range α of the LED 9, and even if the recess 13 </ b> A is tilted, a part of the light hits the recess 13 </ b> A. For this reason, it is effective to take measures for guiding the light to the outside of the lamp cover 15 in the recess 13A.

  FIG. 13 is a diagram showing countermeasures related to reflection in the recess 13A. Unless special measures are taken as shown in FIG. 13A, the reflectance with respect to incident light is low. In FIG. 13B, a highly reflective material 13C for increasing the reflectance of light is attached to the front surface of the concave surface of the concave portion 13A. Here, the material of the highly reflective material 13C is not particularly limited, but the highly reflective material 13C may be formed by a process such as vapor deposition using, for example, aluminum as a material. Moreover, you may make it affix the adhesive tape which has 13 C of highly reflective materials on the single side | surface to the recessed part 13A. As described above, it is possible to perform more efficient illumination by increasing the reflectance with the high reflective material 13C.

  FIG. 14 is a front view of the refrigerator compartment 2 including the outlet 26. On the inner wall surface of the refrigerator compartment 2, there is a blowout port 26 for sending cold air into the refrigerator compartment 2. Here, in order to quickly cool the stored items stored in the door pocket 11 on the front side of the refrigerator compartment 2, in FIG. 14, not only the rear surface but also the front outlets of the left and right inner walls 13 of the refrigerator compartment 2 are provided. ing.

  FIG. 15 is a view showing the lamp cover 15 having the outlet 26. As shown in FIG. 15, the outlet 26 provided in the inner wall 13 is formed integrally with the lamp cover 15. By forming them integrally, it is possible to reduce the material used for the parts, and the number of parts can be reduced, so that the manufacturing cost can be suppressed. Further, since the LED 9 generally has a characteristic that the light intensity decreases as the temperature rises, it is desirable to use the LED 9 in a low-temperature environment as much as possible. However, the LED 9 can be cooled by cold air from the outlet 26.

  On the other hand, since the LED 9 has a characteristic that it is vulnerable to moisture, it is desired that the air having high humidity such as the cold air circulating in the refrigerator compartment 2 is not directly applied to the LED 9 as much as possible. Therefore, as shown in FIG. 15, a partition plate 27 for partitioning the outlet 26 and the lighting device 10 is formed on the lamp cover 15 to block the space provided with the lighting device 10 and the space through which the cold air flows. . Even if the cool air from the outlet 26 does not directly hit the LED 9, the partition plate 27 is cooled by the cool air, and the air around the lighting device 10 is indirectly cooled, so that the LED 9 can also be cooled. In some cases, the partition plate 27 is reinforced with tape or the like to prevent air and moisture from flowing into the outlet 26.

  As described above, according to the second embodiment, the lamp cover 15 having the lens portion 15A refracts the light emitted from the LED 9 and increases the amount of light traveling to the rear side of the refrigerator compartment 2. As with the first embodiment, the dazzling of the user of the refrigerator 1 can be reduced and the door pocket 11 can be illuminated, and the brightness in the refrigerator compartment 2 can be improved. The brightness can be improved with an inexpensive configuration without increasing the number of LEDs 9 as light sources. Moreover, the lighting condition of the refrigerator compartment 2 etc. can also be changed by making the shape of 15 A of lens parts into a desired shape.

  In addition, since the claw 14 and the like are provided on the lamp cover 15 and the illumination device 10 is directly assembled to the lamp cover 15 and then assembled to the recess 13A, the lamp cover 15 and the LED 9 can be assembled according to a preset positional relationship. Therefore, the lighting in the refrigerator compartment 2 can be performed as desired. Further, the angle of the concave surface of the concave portion 13A is devised so that the light reflected from the concave portion 13A enters the refrigerator compartment 2 through the lamp cover 15, so that the inside of the refrigerator compartment 2 can be efficiently illuminated. At this time, more efficient illumination can be performed by providing the highly reflective material 13C on the front side of the recess 13A and increasing the reflectance.

  Further, by integrally forming the outlet 26 for sending cool air into the refrigerator compartment 2 in the lamp cover 15, it is possible to reduce the material used for the parts. At this time, since the LED 9 can be cooled by the cold air flowing through the outlet 26, the luminous intensity of the LED 9 can be maintained. Moreover, the LED 9 can be protected from moisture by providing the partition plate 27 on the lamp cover.

Embodiment 3 FIG.
FIG. 16 is a diagram illustrating an example of a drive circuit. As shown in FIG. 16 (a), the incandescent lamp is turned on / off by switching on / off by a mechanical contact such as the relay 19, while the LED 9 is turned on / off as shown in FIG. 16 (b). The light can be turned off / on using a semiconductor element such as the transistor 20 as a switching element. For this reason, the LED 9 has a very small voltage / current related to light emission (drive) with respect to the incandescent lamp. Also, it is possible to use a drive component for switching on / off of the LED 9 that is relatively inexpensive and has a long life.

  Further, since the relay 19 is a mechanical contact, there is a limit to the speed at which the switch can be switched, the number of times it can be used, etc., but semiconductor elements such as the transistor 20 can be turned on / off far beyond this limit. For this reason, not only lighting / extinguishing but also blinking display in which lighting / extinguishing is repeated at a fast cycle can be easily performed. Therefore, in the refrigerator 1 having the lighting device 10 using the LED 9 as a light source, the teaching of self-diagnosis abnormality information and the like of the refrigerator 1 may be expressed by, for example, the number of blinks of the LED 9 of the lighting device 10.

  FIG. 17 is a diagram illustrating an example of the operation panel 21 provided on the door of the refrigerator. In the conventional refrigerator, when the control means 100 provided in the refrigerator determines that the abnormality has occurred in the refrigerator, for example, a liquid crystal display unit provided in the operation panel 21 installed on the door of the refrigerator as shown in FIG. A self-diagnostic abnormality such as a temperature sensor not correctly detecting the number of blinks of the abnormality display LED 23 provided on the operation panel 21 as shown in FIG. I was expressing information.

  FIG. 18 is a diagram illustrating an example of blinking of the LED 9. In the present embodiment, for example, in addition to the display on the operation panel 21 shown in FIG. 17, the self-diagnosis abnormality information is displayed by blinking the LED 9. For example, in order to represent “34” by blinking of the LED 9, the control unit 100 blinks three times, blanks for 0.5 seconds, blinks four more times, and repeats this.

  Similarly, the LED 9 may be blinked to notify that the door 6 has been open for a long time. If the door 6 is opened for a long time, the cold air in the refrigerator compartment 2 leaks, the temperature of the stored product rises, and power is consumed. For example, the blinking display is also effective when the door is slightly opened because it is intended to be closed, or when the door is not completely closed due to foreign matter sandwiched between the door and the main body.

  As described above, according to the third embodiment, not only the liquid crystal display unit 22 and the abnormality display LED 23 provided on the operation panel 21 but also the LED 9 having sufficient brightness to illuminate the inside of the refrigerator compartment 2 is used. And since it was made to display abnormality etc. to the user of the refrigerator 1, the appeal power of information, such as abnormality, can be further raised to the user of the refrigerator 1, and a user's recognition degree can be made high. it can.

Embodiment 4 FIG.
As described in Embodiment 3 above, switching of turning on / off of the LED 9 can be performed by the transistor 20 or the like. Therefore, it is possible to switch on / off in a shorter cycle. For example, if lighting / extinguishing is repeated at a frequency of several kHz, humans do not appear to blink because of an illusion, and light intensity (brightness) appears to decrease.

  FIG. 19 is a diagram illustrating the relationship between brightness and lighting time. As shown in FIG. 19, the degree of brightness is proportional to the ratio of the lighting time to the unit time (cycle) (hereinafter referred to as the duty ratio). Therefore, for example, by gradually increasing or decreasing the duty ratio, it is possible to obtain a visual effect that the light intensity changes little by little. Therefore, in the third embodiment, the self-diagnosis abnormality information is displayed by simply blinking the LED 9, but in this embodiment, the luminous intensity is changed by adjusting the duty ratio.

  FIG. 20 is a diagram illustrating the relationship between self-diagnosis abnormality information and duty ratio adjustment. For example, if the LED 9 is simply blinked, the change in brightness between when it is turned on and when it is turned off is so severe that the user of the refrigerator may be surprised. However, as shown in FIG. 20, instead of completely turning off the light, gradually increasing or decreasing the light intensity and changing the lighting pattern can notify the user of the abnormality without surprise. Is possible.

  In addition, although an example of displaying a self-diagnosis abnormality by adjusting the brightness by adjusting the duty ratio has been given, the adjustment of the luminous intensity of the LED 9 by adjusting the duty ratio is used for a function that can be selected according to the user's preference of the refrigerator You may do it. For example, the user of the refrigerator 1 can arbitrarily set the light intensity of the LED 9 by allowing the brightness adjustment of the lighting device 10 to be instructed from the operation panel 21 in FIG. For example, when the refrigerator 1 is used in a place where the surroundings are bright, external light enters the refrigerator compartment 2 and does not require much light from the LED 9, so the light intensity level emitted from the LED 9 is lowered. In addition, for example, when it is desired to brightly illuminate the inside of the refrigerator compartment 2 such as organizing stored items in the refrigerator compartment, increasing the luminous intensity level can further reduce the power consumption. I can expect.

  As described above, according to the fourth embodiment, when the LED 9 is caused to emit light, the duty ratio is adjusted, and not by blinking, but by increasing or decreasing the luminous intensity of the LED 9, abnormalities and the like are not surprised by the user. Can be notified. Further, it is convenient because the user can change the setting.

Embodiment 5 FIG.
FIG. 21 is a front view of the refrigerator 1 according to the fifth embodiment. In FIG. 21, the same reference numerals as those in the above-described drawings are the same as those described in the above-described embodiment, and thus description thereof is omitted. The refrigerator 1 according to the present embodiment includes door switches 24A and 24B serving as detection means for detecting whether the right door 6A and the left door 6B are opened.

  For example, when taking out the stored product put on the left side toward the refrigerator compartment 2, the user can take it out by opening only the left door 6B, and when taking out the food put on the right side, only the right door 6A needs to be opened. If the door is opened largely, the amount of cold air flowing out of the refrigerator compartment 2 will increase, leading to an increase in power consumption. Therefore, by opening either the right door 6A or the left door 6B, the opening of the door when taking out stored items can be made as small as possible, and wasteful power consumption can be suppressed. Therefore, since it is necessary to illuminate the inside of the refrigerator compartment 2 by causing the LED 9 of the illumination device 10 installed in the refrigerator compartment 2 to emit light regardless of whether the right door 6A or the left door 6B is opened, FIG. As shown, the door switches 24A and 24B are installed. The control means 100 determines that the right door 6A and the left door 6B are opened based on signals transmitted from the door switches 24A and 24B, and causes the lighting device 10 to perform illumination.

  In the present embodiment, when the lighting device 10 using the LED 9 described in the above-described embodiment as a light source is installed in the refrigerator 1A having the right door 6A or the left door 6B, the wasteful power consumption is further suppressed. It is a thing. For example, a stored item to be taken out by opening the left door 6B is stored on the left side of the refrigerator compartment 2, which is a range that can be seen by opening the door. Conversely, the same applies to the case where the right door 6A is opened to take out stored items. Therefore, if the inside of the refrigerator compartment 2 can be illuminated within a range visible from the opened door, a necessary and sufficient effect can be obtained.

  FIG. 22 is a diagram illustrating illumination in the refrigerator compartment 2 by the LED 9 according to the fifth embodiment. As shown in FIG. 22A, when the left door 6B is opened, only the LED 9 of the lighting device 10 installed on the inner wall 13 on the left side is turned on, and conversely, as shown in FIG. When the door 6A is opened, only the LED 9 of the lighting device 10 installed on the right inner wall 13 is turned on. Moreover, as shown in FIG.22 (c), when both the right door 6A and the left door 6B are opened, the LED 9 of the illuminating device 10 installed in both the left and right inner walls 13 is turned on to illuminate the entire refrigerator compartment 2. Can be illuminated. As described above, since it is possible to turn on / off the LED 9 on / off with an inexpensive and long-life semiconductor element, even if the lighting devices 10 on the left and right inner walls 13 are turned on / off separately, There is no worry about cost increase.

  As described above, according to the fifth embodiment, in the refrigerator 1 having the right door 6A and the left door 6B, for example, when either the right door 6A or the left door 6B is opened, the opened door side. Since only the LED 9 of the lighting device 10 installed on the inner wall 13 is lit to illuminate only necessary portions, it is possible to prevent the power consumption more than necessary and obtain the refrigerator 1 with low power consumption.

Embodiment 6 FIG.
In the fifth embodiment described above, only the lighting device 10 with the right door 6A and the left door 6B opened is turned on, but, for example, depending on the mounting position, mounting angle, etc. of the lighting device 10, it is opposite to the opened door. The lighting device 10 installed on the inner wall 13 in the direction may be turned on. As described above, since the LED 9 has strong directivity characteristics, for example, depending on the installation position of the illumination device 10, it is possible to illuminate the irradiation range widely and efficiently by irradiating the distance to some extent rather than irradiating the vicinity. There is a case. Therefore, the control means 100 determines that the right door 6A and the left door 6B are opened based on signals transmitted from the door switches 24A and 24B, and causes the lighting device 10 to perform illumination.

  FIG. 23 is a diagram illustrating illumination in the refrigerator compartment 2 by the LED 9 according to the sixth embodiment. As shown in FIG. 23 (a), when the left door 6B is opened, only the LED 9 of the illumination device 10 installed on the inner wall 13 on the right side is turned on. Conversely, as shown in FIG. When the door 6A is opened, only the LED 9 of the lighting device 10 installed on the left inner wall 13 is turned on. Moreover, as shown in FIG.22 (c), when both the right door 6A and the left door 6B are opened, the LED 9 of the illuminating device 10 installed in both the left and right inner walls 13 is turned on to illuminate the entire refrigerator compartment 2. Can be illuminated.

  As described above, according to the sixth embodiment, in the refrigerator 1 having the right door 6A and the left door 6B, for example, when the distance between the loading shelf 8 and the lighting device 10 is long, the right When either the door 6A or the left door 6B is opened, only the LED 9 of the lighting device 10 installed on the inner wall 13 on the opposite side to the opened door is lit, and only necessary portions are illuminated. Therefore, it is possible to prevent the power consumption more than necessary and obtain the refrigerator 1 with low power consumption.

Embodiment 7 FIG.
FIG. 24 is a diagram illustrating illumination in the refrigerator compartment 2 by the illumination device 10 (LED 9) according to the seventh embodiment. In Embodiment 5 and 6 mentioned above, the example which installs the illuminating device 10 on the both sides of the inner wall 13 of the refrigerator compartment 2 was shown. For example, depending on the volume in the refrigerator compartment 2, the luminous intensity of the LED 9, etc., if the illumination device 10 is provided on either the left or right inner wall 13, there is a possibility that the entire interior of the refrigerator compartment 2 can be illuminated. Therefore, in the present embodiment, the illumination device 10 is installed on either the left or right inner wall 13 (provided on the left inner wall 13 in FIG. 24).

  Here, for example, if the number of LEDs 9 used for the light source of the lighting device 10 is the same as the number of LEDs 9 when the lighting device 10 is installed on the left and right inner walls 13 as in the fifth and sixth embodiments, Since the total light emission amount (energy related to light emission) from all the LEDs 9 does not change, it is possible to secure a sufficient light emission amount to illuminate the inside of the refrigerator compartment 2 which is inferior to the case of the fifth and sixth embodiments. Become.

  Moreover, in the space in the refrigerator compartment 2, since the part where the effective irradiation range α of each LED 9 overlaps increases, for example, the effect of appearing brighter than when the same number of LEDs 9 arranged on the left and right inner walls 13 is arranged. can get. Therefore, as a result, the same brightness can be obtained with a smaller number of LEDs 9 than when the lighting device 10 is installed on the left and right inner side walls 13, and the number of LEDs 9 used can be reduced.

  FIG. 25 is a diagram illustrating a control example when the lighting device 10 is installed on the inner wall 13 on either the left or right side. As described above, if only the range that can be seen when the door is opened can be irradiated by the LED 9, a necessary and sufficient illumination effect can be obtained. For example, when the lighting device 10 is installed on the left and right inner walls 13, a sufficient lighting effect and low power consumption can be realized by lighting one of the lighting devices 10 according to the opened door. For example, even when the lighting device 10 is installed only on the inner wall 13 on one side, substantially the same effect can be realized by adjusting the duty ratio of the LED 9.

  If the control means 100 determines that both the left and right doors are open based on the signals from the door switches 24A and 24B, the LED 9 is caused to emit light with the above-described duty ratio being 100%. For example, if it is determined that one of the doors is open, the LED 9 may emit light with a brightness with a duty ratio of about 50%, for example.

  Further, the light of the LED 9 is displayed when the door on the side where the lighting device 10 is installed (the one closer to the lighting device 10) is opened and when the door on the opposite side (the one far from the lighting device 10) is opened. You may make it vary the brightness of. For example, when the door on which the lighting device 10 is installed is opened, the LED 9 is caused to emit light at a brightness with a duty ratio of about 40%, opposite to the side on which the lighting device 10 is installed. When the door on the side is opened, the LED 9 is caused to emit light with a brightness with a duty ratio of about 60%. And you may make it the lighting condition in the refrigerator compartment 2 visible from the open door become constant by varying the brightness of the light by LED9. Further, power consumption can be suppressed by adjusting the duty ratio. In addition to the example in which the duty ratio is adjusted according to the distance from the illumination device 10, for example, the duty ratio may be adjusted according to the area of the necessary irradiation range.

  As described above, according to the seventh embodiment, in the refrigerator 1 having the right door 6A and the left door 6B, for example, when either the right door 6A or the left door 6B is opened, both are opened. Since the duty ratio is made smaller, the brightness for illuminating the refrigerator compartment 2 and the like is adjusted, and only necessary portions are illuminated, the power consumption more than necessary is prevented, and the refrigerator 1 with low power consumption is obtained. Can do. In particular, in the refrigerator 1 in which the lighting device 10 is installed on the inner wall 13 on either the left or right side, the duty ratio is changed by determining whether the opened door is closer to or farther from the lighting device 10. By doing so, it is possible to make fine adjustments such as making the lighting condition constant.

Embodiment 8 FIG.
FIG. 25 is a top view of the refrigerator compartment 2 according to the eighth embodiment. In the embodiment described above, the illuminating device 10 is attached so that the angle θ of the optical axis of the LED 9 with respect to the inner wall 13 is larger than 60 °, so that the optical axis 12 of the LED 9 is directly on the front edge of the stacking shelf 8. It was made not to enter. In the present embodiment, the angle θ of the optical axis 12 of the LED 9 with respect to the inner wall 13 is set to be smaller than 30 ° so that the light in the direction of the optical axis 12 of the LED 9 does not directly enter the loading shelf 8. The lighting device 10 is attached. Depending on the shape of the inner wall 13 and the like, it is possible to effectively prevent light in the optical axis direction from entering the stacking shelf 8 more effectively when the angle θ of the optical axis 12 is smaller than 30 °. In addition, by making the angle θ smaller than 30 °, the reflected light from the recess 13A can be used when irradiating the entire refrigerator compartment 2, and uneven irradiation can be eliminated and well-balanced irradiation can be performed.

  FIG. 26 is a diagram for illustrating the relationship between the LED 9 and the inner wall 13. The effective irradiation range α when the angle θ of the optical axis of the LED 9 with respect to the inner wall 13 is an angle smaller than 30 ° is as shown in FIG. And the refrigerator compartment 2 back side of the recessed part 13A provided in the inner wall 13 in this Embodiment is made into the shape which has the curved part 13B.

  For light emitted from the LED 9, for example, light traveling in the right direction from the optical axis 12 directly enters the refrigerating chamber 2 and irradiates the refrigerating chamber 2 as shown in FIG. On the other hand, the light traveling in the left direction from the optical axis 12 is reflected in the recess 13A as shown in FIG. Here, when light incident on a portion other than the curved portion 13B is reflected, the light enters the refrigerator compartment 2. The light reflected by the light incident on the curved portion 13B travels in the direction of the door pocket 11 of the opened door and irradiates the door pocket 11.

  Thus, since the light of the optical axis 12 of the LED 9 does not directly enter the loading shelf 8, the user of the refrigerator 1 does not feel dazzled by the reflected light from the loading shelf 8. And the light by LED9 is used in order to illuminate the refrigerator compartment 2 and the door pocket 11 of the opened door 6 including the part which injects into the refrigerator compartment 2 directly, and the part reflected by the inner wall 13.

  FIG. 27 is a diagram illustrating light reflection countermeasures in the recess 13A according to the eighth embodiment. As shown in FIG. 27A, the light reflected from the inner wall 13 is weakened if nothing is done. On the other hand, FIG. 27B shows a case where a highly reflective material 13C for increasing the reflectance of light is applied to the entire concave surface of the concave portion 13A. By attaching the highly reflective material 13C, light traveling in the direction of the recess 13A can be efficiently reflected. Here, the material of the highly reflective material 13C is not particularly limited. For example, the highly reflective material 13C may be formed by a process such as vapor deposition using aluminum or the like as a material.

  FIG. 27C is a view in which a highly reflective material 13C is attached to a portion of the recess 13A other than the curved portion 13B. As described above, the light reflected by the curved portion 13B travels in the direction of the door pocket 11 of the opened door. However, if the reflectance is too high, the light reflected in front of the refrigerator compartment 2 becomes stronger. Refrigerator users may feel dazzling. Therefore, the light incident on the portion other than the curved portion 13B is reflected with a high reflectance so as to enter the storage chamber 2, and the light incident on the curved portion 13B is reflected and weakened. In addition, as shown in FIG. 27 (d), a lamp cover 25 may be provided for weakening light traveling in the direction of the door pocket 11 by diffusion, attenuation, or the like.

  FIG. 28 is a diagram showing the shape of the recess 13A. In FIG. 26 and the like, light is caused to travel in the direction of the door pocket 11 by providing the curved portion 13B, but the shape of the recess 13A in the present embodiment is not limited to the curved portion 13B. For example, as shown in FIG. 28A, a structure having an inclined portion 13D in which one inclined portion is formed may be used, or as shown in FIG. 28B, a plurality of inclined portions in which a plurality of inclined portions are formed. You may make it the structure which has 13E.

  As described above, according to the eighth embodiment, the angle formed by the optical axis 12 of the light emitted from each LED 9 and the inner wall 13 is smaller than 30 °, and the light in the direction of the optical axis 12 is directly applied to the loading shelf 8. Since the light is not incident, the light in the direction of the optical axis 12 of the LED 9 does not directly hit the front edge of the loading shelf 8 as in the first embodiment, so that the glare of the user can be reduced and the refrigerator is refrigerated. High visibility in the chamber 2 can be ensured. At this time, with respect to the light traveling toward the concave portion 13A, a part of the reflected light enters the refrigerator compartment 2, and a part of the light reflected by the curved portion 13B illuminates the door pocket 11. By doing so, the inside of the refrigerator compartment 2 and the door pocket 11 can be illuminated. Further, by providing the highly reflective material 13C on the concave surface of the concave portion 13A to increase the reflectance, more efficient illumination can be performed.

Embodiment 9 FIG.
FIG. 29 is a diagram illustrating an arrangement state of the LEDs 9 in the refrigerator compartment 2 according to the ninth embodiment. The illuminating device 10 using the LED 9 as a light source shown in the above-described embodiments is installed in a recess 13 </ b> A provided on the inner wall 13 of the refrigerator compartment 2. And about the printed circuit board 16 which mounted LED9, it installed so that the up-down direction of the refrigerator compartment 2 may become a longitudinal direction. As shown to Fig.29 (a), in order to irradiate the whole inside of the refrigerator compartment 2, fundamentally, it arrange | positions so that each LED9 may become as equal intervals as possible.

  However, in the case of FIG. 29 (a), the vicinity of the center of the refrigerator compartment 2 is brightened by irradiation with light from the two LEDs 9 in the vertical direction, but one LED 9 is provided in the vicinity of the upper and lower ends of the refrigerator compartment 2. Because it is irradiated with only the light, it becomes darker than near the center.

  Therefore, in this embodiment, as shown in FIG. 29B, the number of LEDs 9 is increased to, for example, two at the upper and lower ends of the lighting device 10 to improve the brightness near the upper and lower ends of the refrigerator compartment 2. For the remaining sections, the LEDs 9 are arranged at equal intervals.

  As described above, according to the ninth embodiment, by increasing the number of the LEDs 9 at the upper and lower end portions of the lighting device 10, uneven brightness in the vertical direction is improved and the brightness in the refrigerator compartment 2 is made uniform. Therefore, an efficient refrigerator 1 can be obtained with an inexpensive configuration.

2 is a schematic cross-sectional side view of the refrigerator 1 according to Embodiment 1. FIG. It is a front view of the refrigerator compartment 2. It is a figure showing the light emission characteristic of general LED9. It is a top view of the refrigerator compartment 2. It is a top view of the conventional refrigerator. FIG. 4 is a relationship diagram between the lighting device 10 and the lamp cover 15. It is the figure which showed the change of the light of LED9 at the time of using the lamp cover 15. FIG. It is a figure showing the positional relationship of LED9 and the lamp cover 15. FIG. It is a figure showing the relationship between the shape of the lamp cover 15, and the refraction of light. It is a figure showing the characteristic of a resin material. It is the figure which showed the assembly | attachment method to the refrigerator 1 of the illuminating device. It is a figure showing the example of a shape of the inner wall 13. FIG. 10 is a diagram illustrating light reflection countermeasures of the second embodiment. It is a front view of the refrigerator compartment 2 including the blower outlet 26. FIG. It is a figure showing the lamp cover 15 which has the blower outlet 26. FIG. It is a figure showing the example of a drive circuit. It is a figure showing the example of the operation panel provided in the door of the refrigerator. It is a figure showing the example of blinking of LED9. It is a figure showing the relationship between a brightness and lighting time. It is a figure showing the relationship between self-diagnosis abnormality information and adjustment of a duty ratio. It is a figure showing the front view of refrigerator 1A which concerns on Embodiment 5. FIG. It is a figure showing about the illumination in the refrigerator compartment 2 by LED9. It is a figure showing about the illumination in the refrigerator compartment 2 which concerns on Embodiment 6. FIG. It is a figure showing about the illumination in the refrigerator compartment 2 which concerns on Embodiment 7. FIG. It is a figure of control in the case of installing the illuminating device 10 in one inner wall 13. It is a top view of the refrigerator compartment 2 which concerns on Embodiment 8. FIG. FIG. 20 is a diagram illustrating light reflection countermeasures in the eighth embodiment. It is a figure showing the shape of 13 A of recessed parts. It is a figure showing the arrangement | positioning state of LED9 which concerns on Embodiment 9. FIG.

Explanation of symbols

  1 refrigerator, 2 refrigerator compartment, 3 switching room, 4 vegetable room, 5 freezer room, 6 hinged door, 7 pull-out door, 8 loading shelf, 9 LED, 10 lighting device, 11 door pocket, 12 optical axis, 13 inner wall, 13A concave portion, 13B curved portion, 13C highly reflective material, 13D inclined portion, 13E multiple inclined portions, 14 claws, 15, 17, 25 lamp cover, 15A lens portion, 16 printed circuit board, 18 elementary optical axes, DESCRIPTION OF SYMBOLS 19 Relay, 20 Transistor, 21 Operation panel, 22 Liquid crystal display part, 23 Abnormality display LED, 24 Door switch, 26 Outlet, 27 Partition plate, 100 Control means.

Claims (14)

A storage room having a space for storing stored items, which is opened or shielded from the external space through a door that can be opened and closed;
One or a plurality of loading shelves for partitioning the storage chamber into a plurality of storage spaces in the vertical direction;
A lighting device in which a plurality of light emitting diodes for illuminating the storage chamber are arranged side by side in the vertical direction at a position closer to the door than the loading shelf on the side wall of the storage chamber;
The angle formed by the optical axis of the light emitting diode and the side wall in a plane parallel to the stacking shelf is larger than 60 °, and the light in the optical axis direction of the light emitting diode is not directly incident on the stacking shelf. A refrigerator characterized by directing the plurality of light emitting diodes of a lighting device.   The lamp cover having a lens portion for refracting light emitted from the light emitting diode to expand an irradiation range in the storage chamber is provided in a traveling direction of the light emitted from the light emitting diode. Refrigerator.   The refrigerator according to claim 2, wherein the lamp cover is provided so that light in the optical axis direction is incident on the lens unit.   The refrigerator according to claim 2 or 3, wherein a claw for assembling the lighting device is provided on the lamp cover.   The refrigerator according to claim 1, wherein the plurality of light emitting diodes are housed in a recess provided in the side wall.   Instead of making the angle between the optical axis of the light emitting diode and the side wall larger than 60 ° in a plane parallel to the stacking shelf, the angle formed between the optical axis of the light emitting diode housed in the recess and the side wall is 6. The refrigerator according to claim 5, wherein the plurality of light emitting diodes are directed in a direction smaller than 30 degrees.   The refrigerator according to claim 5 or 6, wherein the concave portion is formed so that a part of the light reflected by the concave surface of the concave portion irradiates the opened door.   The refrigerator according to claim 5, wherein a highly reflective material is attached to all or part of the concave surface of the concave portion. It further comprises a control means for judging an abnormality in the cabinet,
The refrigerator according to any one of claims 1 to 8, wherein the control means blinks the light emitting diode in order to display an abnormality. It further comprises a control means for judging the operating state and abnormality in the warehouse,
The refrigerator according to any one of claims 1 to 8, wherein the light intensity of the light emitting diode is changed to display the operation state and / or abnormality.   The door that opens or shields the storage chamber is a double door that is connected to the left and right side walls by hinges, and the light emitting diodes of the lighting device are arranged on the left and right side walls in the storage chamber. The refrigerator according to claim 1, wherein the light emitting diode disposed on the side wall connected to the door is caused to emit light.   The door that opens or shields the storage chamber is a double door that is connected to the left and right side walls by hinges, and the light emitting diodes of the lighting device are disposed on the left and right side walls of the storage chamber. The refrigerator according to claim 1, wherein the light emitting diode disposed on the side wall opposite to the side connected to the door is caused to emit light.   The door that opens or shields the storage chamber is a double door that is connected to the left and right side walls by hinges, and the light emitting diode of the lighting device is disposed on at least one side wall of the storage chamber, The refrigerator according to any one of claims 1 to 10, wherein the light intensity of the light emitting diode is changed based on an opened door.   The refrigerator according to any one of claims 1 to 13, wherein the number of light emitting diodes at the upper and lower end portions of the lighting device is larger than that of other portions.

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