JP2008075936A - refrigerator - Google Patents

Abstract

When an LED emitting a wavelength in the visible light region is used as interior lighting for a refrigerator or the like, shadows are generated due to the front-rear and top-bottom positional relationship of the stored item in the refrigerator due to the directivity characteristics of the LED. There is a problem that the visibility of the is reduced.
The first angled LED 21 sets the irradiation direction for irradiating the back side, and the second angled LED 22 uses the directivity of the LED by setting the irradiation direction for irradiating the front side. On the one hand, it can illuminate the range of the side from the back side in the cabinet, and on the other hand, it can illuminate the range of the side surface from the front in the refrigerator. Can be uniformly irradiated to improve the irradiation range.
[Selection] Figure 5

Description

  The present invention relates to a refrigerator in which a lighting device is installed in a cabinet.

  In recent years, as a lighting device in a refrigerator, a device using a semiconductor issuance element has been proposed for reasons such as low heat generation, no infrared wavelength, low voltage driving, etc., instead of conventional incandescent lamps and light bulbs.

  As a refrigerator using a conventional light-emitting diode as a lighting device, there is a refrigerator in which a plurality of light-emitting diodes are arranged in a square shape and installed on the top surface of the interior to irradiate the interior (for example, see Patent Document 1).

  FIG. 8 is a perspective view of a lighting device for a conventional ice making machine described in Patent Document 1, and FIG. 9 is a conceptual diagram in which the lighting device of FIG. 8 is installed on the top surface of the ice making machine.

  In the illuminating device 5 of FIG. 8, the mounting substrate 1 has a flat plate shape, a circuit pattern (not shown) is formed on one side or both sides, and an epoxy resin type substrate having good thermal conductivity is used. The LED 2 is formed in a bullet shape, and two energizing terminals 3 for energizing current are led out.

  The heat insulating plate 4 is formed in a flat plate shape using a resin such as urethane, and is provided between the mounting substrate 1 and the LED 2 with a plurality of insertion holes arranged in parallel. Here, the LED 2 has the current-carrying terminal 3 inserted through the insertion hole of the heat insulating plate 4, soldered to the circuit pattern of the mounting substrate 1, and a plurality of LEDs 2 are arranged in parallel on the mounting substrate 1. In addition, when the emitted-heat amount of LED2 is small, the heat insulation board 4 may be abolished.

  In FIG. 9, the lighting device 5 is disposed on the top surface 7 in the refrigerator of the ice making machine 6.

  The operation | movement is demonstrated below about the refrigerator using LED comprised as mentioned above as an illuminating device.

First, when the refrigerator door is closed, the LED 2 is not energized and the interior is not illuminated. When the door is opened, an electronic switch such as a mechanical switch or a hall IC determines that the door is open, a forward current flows through the LED 2, light is emitted, and the interior is irradiated.
JP 2001-82869 A

  However, in the above conventional configuration, when the lighting device is arranged on the ceiling surface in the refrigerator, when there is a storage shelf that divides the interior of the refrigerator in the refrigerator, the visibility of the stored items below the storage shelf is: The light is blocked by the storage shelf itself or the stored items placed on the storage shelf, and the illuminance at the lower stage of the storage shelf is significantly reduced. In the case of having a plurality of storage shelves as in a general household refrigerator, this becomes more conspicuous as the storage shelves become lower.

  In addition, compared to incandescent lamps and light bulbs used for lighting applications, LED light has a strong directivity, so it is difficult to irradiate light over a wide range. As a result, many LEDs are arranged as in the prior art. The unit needs to be configured. This configuration not only incurs an increase in cost due to the use of many LEDs, but also has low irradiability, such as overlapping of light from other than the irradiation direction of adjacent LEDs, and from the mounting substrate and circuit pattern due to increased current consumption Heat generation becomes a problem. Especially when used in a refrigerator, and because the LED mounting board is built in the cabinet, the irradiation range and illuminance are improved as illumination in the cabinet, the heat generated by LED emission with reduced current consumption, and the power consumption of the refrigerator It is required to achieve both suppression.

  This invention solves the said conventional subject, and it aims at providing the refrigerator which has an illuminating device for equalizing the illumination in a store | warehouse | chamber regardless of the up-and-down positional relationship of the stored matter in a refrigerator. .

  In order to solve the above-described conventional problems, the refrigerator of the present invention is an illumination in the refrigerator, which is installed in the refrigerator by providing at least two kinds of LED irradiation directions.

  As a lighting device in the refrigerator, the stored light is placed in the irradiation direction of the LED so that the light to be irradiated is blocked and the light on the back side does not reach due to the shadow of the stored material, and the visibility of the stored material is deteriorated. However, with an LED having at least two types of irradiation directions, even if a stored item is placed so as to block one of the LED irradiation directions, no shadow is generated by the light emitted from the other LED, The visibility of the back side in the refrigerator can be improved.

  In addition, compared to the case where a lighting device is provided on the ceiling surface, it is possible to suppress the occurrence of shadows due to the upper and lower positions of the stored item, so that the illumination of the stored item is significantly improved even in the lower part of the warehouse. be able to.

  In the refrigerator of the present invention, one of the irradiation directions of the LEDs irradiates the back side of the storage room, and the other irradiates the front side of the storage room.

  Thereby, as an illuminating device in the refrigerator, one LED can illuminate the back side in the refrigerator, and the other can illuminate the near side in the refrigerator, with the LED having at least two types of irradiation directions, and the directional characteristics of the LED Even in a storage space having a depth, the entire interior can be illuminated uniformly, and uniform illumination can be ensured over a wide range.

  In the refrigerator of the present invention, as the illumination in the refrigerator, an illumination device having two or more angles of the LED irradiation direction is arranged in the refrigerator, so that one illuminates the back side in the refrigerator and the other in the refrigerator. Since the front side is illuminated, even in a storage space with a depth, the entire interior can be irradiated uniformly, and the quality of the interior irradiation can be improved.

  The invention according to claim 1 is a heat-insulated compartment, and has an LED that irradiates the interior of the storage room and a mounting board on which a plurality of the LEDs are mounted, and the irradiation direction of the LED is set to at least two kinds of angles. By providing and installing in the storage chamber, the angle of one of the LEDs can be illuminated on the back of the storage chamber, and the other LED can be illuminated on the side of the storage chamber using the directivity of the LED. It is possible to ensure uniform illumination over a wide range of directional irradiation of the LED.

  The invention according to claim 2 is the invention according to claim 1, further comprising a mounting substrate on which the plurality of LEDs are mounted, and the plurality of LEDs mounted by embedding the mounting substrate in the storage chamber. Is integrated with the mounting substrate, so that there is no need for complicated wiring for each LED, and mounting of the mounting substrate can be facilitated.

  Further, by embedding the mounting substrate, when the storage chamber is viewed from the front, there is no convex portion of the mounting substrate, so that the space of the storage chamber can be secured without impairing the aesthetics, and taking in and out foods, etc. Because it does not have a ledge that resists, smooth storage can be realized.

  When there is room in the storage space or when importance is placed on illuminance, it may be installed on the indoor wall surface.

  According to a third aspect of the present invention, there is provided a mounting substrate on which a plurality of the LEDs are mounted, and the LEDs are arranged in the storage chamber with at least two kinds of irradiation directions. Alternatively, in the invention described in 2, the mounting substrate is disposed in at least one place including the upper, lower, left, and right rear surfaces and corners in the storage chamber, so that a lighting device that is irradiated from one direction is disposed. The amount of light on the downstream side of the stored material is secured with respect to the traveling direction of light, the deterioration of visibility is suppressed, the shadow is not affected by the vertical position of the stored material, and the stored material is also visible in the lower part of the cabinet. Can be improved.

  In addition, since the optical axis is inclined to the left and right (up and down), when installed on the back of the storage room, light can be emitted from the back direction, so that direct viewing of the LED can be avoided and visibility is improved. Can be increased.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein one of the irradiation directions of the LEDs irradiates a back side of the storage chamber, and the other is the storage chamber. By illuminating the front side of the LED, it is possible to illuminate the back side from the back side in the storage room on the one hand, and illuminate the side surface from the front side in the refrigerator on the other side. However, even in a storage space with a depth, the entire storage chamber can be irradiated uniformly, and the irradiation range can be improved.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, the boundary between the back side and the near side in the irradiation direction of the LED is approximately ½ of the depth dimension. Irradiance unevenness in which the irradiation light overlaps can be suppressed, irradiation unevenness in the entire storage chamber can be suppressed, and uniform illumination can be provided.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the mounting board is disposed in front of approximately half of the depth dimension in the cabinet, thereby Since the stored object can be irradiated from the front, the front of the stored object does not become a shadow, and the visibility can be further improved. Moreover, since each shelf in the warehouse occupies about ½ or more of the depth, a space other than each shelf can be used effectively.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, an angled spacer is provided between the LED and the mounting substrate, so that the LED has an irradiation angle. As a result, the LED mounting angle can be prevented from changing due to bending of the lead wire during mounting or mounting, and the LED angle can be held at an optimum position, thereby facilitating mounting.

  The invention according to claim 8 is the LED according to any one of claims 1 to 7, wherein the LED has directivity characteristics by being mounted with the irradiation angles of the LEDs alternately different from each other. Are alternately provided, the irradiation light of the LEDs does not overlap, the illuminance unevenness produced on the inside of the cabinet can be suppressed, and the inside of the refrigerator can be irradiated with a uniform amount of light. The meaning of the “alternate” is not necessarily limited to a single one, but includes a plurality and a single or a plurality of sequences.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the same reference numerals are given to the same components as those of the conventional example, and detailed description thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view showing a state in which the refrigerator door in Embodiment 1 of the present invention is opened. FIG. 2 is a cross-sectional view of the refrigerator in the first embodiment of the present invention taken along line AA in FIG. FIG. 3 is a cross-sectional view (a cross-sectional view taken along the line BB in FIG. 2) in which a lighting device is installed on the side wall of the refrigerator according to Embodiment 1 of the present invention. FIG. 4 is a directivity characteristic diagram of the light-emitting diode according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view of the refrigerator in the first embodiment of the present invention taken along the line CC of FIG. 6 is a cross-sectional view taken along the line DD of FIG. 1 of the refrigerator according to Embodiment 1 of the present invention.

  1 and 2, the refrigerator main body 8 configured to be thermally insulated from the surroundings by a heat insulating material forms a storage room divided into a plurality of compartments, and the uppermost storage room is a refrigeration room 9, a refrigeration room. An ice making chamber 10 and a switching chamber 11 which are insulated and partitioned by a partition wall are arranged side by side immediately below 9. The lowermost storage room has a freezing room 13 and a vegetable room 12 arranged between the ice making room 10 and the switching room 11 and the freezing room 13.

  In the refrigerator compartment 9, a plurality of storage shelves 15 are provided for organizing and storing stored items without overlapping, and a part thereof is configured to be movable up and down. At the lowest level, a specific low temperature chamber 16 having a dedicated door on the front surface is provided, and the consumer stores the selected specific stored material at an optimum temperature.

  In addition, the mounting substrate 1 is embedded in the indoor side wall of the refrigerator compartment 9 on the left and right as viewed from the front of the door opening, and the upper surface of the mounting substrate 1 is covered with a lamp cover 14. Moreover, the heat insulating material 4 may not be used, for example, when the heat generation of the LED is small or the heat resistance of the substrate is high.

  Next, in FIG. 3, the mounting substrate 1 is a flat plate with a circuit pattern (not shown) formed on one or both sides, and an epoxy resin substrate or an insulating metal substrate with good thermal conductivity is used. The LED 2 is formed in a bullet shape, and two energizing terminals 3 for energizing current are led out. The heat insulating plate 4 is formed in a flat plate shape using a resin such as urethane, and a plurality of insertion holes are provided in parallel, and are mounted in the order of the mounting substrate 1, the heat insulating material 4, and the LED 2.

  Here, the LED 2 has the current-carrying terminal 3 inserted through the heat insulating plate 4 through the insertion hole, is soldered to the circuit pattern of the mounting substrate 1, and is mounted on the mounting substrate 1. The mounting substrate 1 is held by a first spacer 18 in a recessed portion 19 inside the refrigerator side wall 17, and the refrigerator is arranged such that the lamp cover 14 covers the entire light emitting part of the LED 2 at a certain distance from the light emitting part of the LED 2. The side wall 17 is mounted in the inner recess 19.

  In the embodiment, the lighting device is embedded in the side wall of the refrigerator. However, as long as a stored object such as food can be irradiated through the lamp cover 14, the lighting device may be embedded in any position in the storage such as the top wall. In addition, as LED2, the thing of white light is optimal, and the thing with the Kelvin value of color temperature in the range of 4000K to 7000K is specifically preferable.

  FIG. 4 is a graph showing directivity characteristics regarding the light irradiation direction of the LED 2. When the irradiation direction is a vertical direction, the irradiation range is within a line. For example, at an irradiation amount of 1/2, the irradiation angle is preferably about 30 degrees on each of the left and right sides as in E.

  5 and 6, the second spacer 20 is formed on a flat plate having at least two kinds of angles, and a plurality of insertion holes are arranged side by side, and the mounting substrate 1, the heat insulating material 4, and the second spacer. 20, 1st angled LED21 and 2nd angled LED22 are attached in order. The first angled LED 21 and the second angled LED 22 are held with an angle so as to be centered on the angle G and the angle H with respect to the vertical line F from the mounting substrate 1. This angle is divided into two equal parts based on the depth dimension I of the refrigerator compartment 9, and the angle G is maintained with I1 being the depth side from 1/2 of the depth dimension and I2 being the front side from 1/2 of the depth dimension. Thus, the first angled LED 21 is set to the irradiation direction J for irradiating the depth side I1 from 1/2 of the depth dimension, and by holding the angle H, the second angled LED 22 has the depth dimension of 1 An irradiation direction K for irradiating the front side I2 from / 2 is set. The angle G and angle H are arbitrary values set so that the interior can be illuminated evenly according to the directivity characteristics of the LED, and are determined by the volume in the refrigerator and the LED to be used. It is set so that it is difficult to distribute light in the back direction inside the cabinet, and the other is set so that light is distributed in the side direction in the cabinet that suppresses the shadow of food by the stored matter. The angles G and H are preferably between 30 degrees and 60 degrees. Especially when a bullet-type LED is used, the angle is around 30 degrees. Moreover, about the content which the boundary line by irradiation of 1st angled LED21 and 2nd angled LED22 is located in about 1/2 of the depth in a warehouse, each of 1st angled LED21 and 2nd angled LED22 It is thought that the position of the boundary line changes by balancing quantity and illuminance.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the refrigerator door is closed, the first angled LED 21 and the second angled LED 22 are not energized, and the interior is not illuminated. When the door is opened, a forward current flows through the first angled LED 21 and the second angled LED 22 to emit light. Up to this point, the operation is the same as that of the conventional example.

  Next, the light emitted from the first angled LED 21 and the second angled LED 22 travels to the lamp cover 14 to irradiate the inside of the refrigerating room 9, and the left and right inside the refrigerating room 9. From the front side with respect to the depth dimension of the wall surface, one is emphasized with respect to the back side direction inside the cabinet, and the other is emphasized with respect to the side direction inside the cabinet, depending on the irradiation angle set by the directivity characteristic of the light irradiation direction. The light is distributed on the front and side surfaces of the stored matter.

  Although not described in the first embodiment, by disposing the mounting substrate 1 on the back side from the approximate half of the depth dimension of the refrigeration chamber 9, light emitted from the mounting substrate 1 is directly observed. It is also possible to avoid jumping into.

  As described above, in the present embodiment, by utilizing the directivity of the LED, the angle of one LED can be illuminated on the back surface in the storage chamber, and the angle of the other LED can be illuminated on the side surface in the storage chamber. The directivity irradiation range of the LED can be improved.

  In addition, since a plurality of mounted LEDs are integrated with the mounting substrate, complicated wiring to be mounted for each LED is not necessary, and mounting of the mounting substrate can be facilitated.

  Also. By embedding the mounting substrate, there is no convex portion of the mounting substrate when the storage chamber is viewed from the front, so that the space of the storage chamber can be secured without impairing the beauty.

  Moreover, compared with the case where the illuminating device irradiated from one direction is arrange | positioned, the light quantity of the downstream of a preservation | save thing is ensured with respect to the advancing direction of light, and the fall of visibility can be suppressed.

  In addition, compared with the case where an illumination device that emits light from one direction is provided, the amount of light on the downstream side of the stored product is ensured with respect to the traveling direction of light, and a decrease in visibility is suppressed. The visibility of stored items can be improved even in the lower part of the cabinet without being affected by the shadow due to the position.

  In addition, since the optical axis is inclined to the left and right (up and down), it is possible to irradiate the stored matter in the storage room from the back direction, so it is possible to avoid direct viewing of the LED, and to improve the visibility. .

  Also, using the directivity of the LED, one can illuminate the back side from the back side in the storage room, and the other side can illuminate the side surface from the front in the refrigerator. The entire storage chamber can be irradiated uniformly, and the irradiation range can be improved.

  Moreover, the illumination nonuniformity with which the irradiation light of LED and irradiation light overlap can be suppressed, and the irradiation nonuniformity of the whole storage chamber can be suppressed.

  In addition, since the stored matter in the storage room can be irradiated from the front, the front of the preserved product does not become a shadow, the visibility can be further improved, the classification of food, etc., the hue and the surface condition It becomes easy to identify and can contribute to freshness judgment.

  In addition, the second spacer prevents the LED mounting angle from changing due to bending of the lead wire during mounting or mounting, and allows the LED angle to be held at the optimal position, facilitating mounting workability. Can be. It is possible to provide a high-quality LED substrate in terms of quality by eliminating angular variation.

(Embodiment 2)
FIG. 7 is a cross-sectional view in which a lighting device is installed on the side wall of the refrigerator according to the second embodiment of the present invention (a cross-sectional view at the same location as FIG. 2 of the first embodiment).

  In addition, the same code | symbol is provided about the same structure as a prior art example or Embodiment 1, and the detailed description is abbreviate | omitted.

  In FIG. 7, the storage shelves 15 installed in the refrigerator compartment 9 are arranged at arbitrary intervals set so as to efficiently store the stored items, and on the mounting substrate 1 on the refrigerator side wall 17. The first angled LED 21 is disposed within the interval between the storage shelves 12, is irradiated from the back of the refrigerator to the back side in the irradiation direction L direction, and light emitted from the lamp cover 14 is emitted from the back of the storage. The back side is irradiated. The second angled LED 22 on the mounting substrate 1 on the refrigerator side wall 17 is installed so as to be at a height position of the storage shelf 15 and is irradiated from the side surface of the refrigerator toward the front side in the irradiation direction M direction. Mounting substrate 1 so that the first angled LED 21 and the second angled LED 22 are alternately directed in different irradiation directions so that the light emitted from the lamp cover 14 is irradiated from the side surface in the cabinet to the front side. Provided.

  About the illuminating device of the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  First, when the refrigerator door is closed, the first angled LED 21 and the second angled LED 22 are not energized, and the interior is not illuminated. When the door is opened, a forward current flows through the first angled LED 21 and the second angled LED 22 to emit light. Up to this point, the operation is the same as that of the conventional example.

  Next, the light emitted from the first angled LED 21 travels to the lamp cover 14 and the inside of the cabinet is irradiated from the lamp cover 14. The irradiated light is diffused by the lamp cover 14, but the first angled LED 21 is disposed within the interval between the storage shelves 14. The light distribution is concentrated on the preserved items.

  Further, the light emitted from the second angled LED 22 travels to the lamp cover 14 and the interior of the cabinet is irradiated from the lamp cover 14. Irradiated light is diffused by the lamp cover 14, but the second angled LED 22 is disposed at a height position of the storage shelf 14, whereby directivity characteristics in the light irradiation direction. As a result, light is partially transmitted through the storage shelf 14, the entire storage shelf 14 emits light, and the stored matter on the storage shelf is illuminated with light from below, so that visibility can be improved.

  It is also possible to arrange the first angled LED 21 and the second angled LED 22 two by two, or two and one each. By providing different angles alternately, directivity characteristics in the light irradiation direction can suppress light unevenness in which the irradiation light overlaps, and the entire interior of the refrigerator can be uniformly irradiated with a uniform light amount.

  As described above, in the present embodiment, by alternately providing LEDs with directivity characteristics, the irradiation light of the LEDs does not overlap, and the uneven illuminance produced on the inside of the warehouse can be suppressed, with a uniform light amount. The inside of the refrigerator can be irradiated.

  As described above, the refrigerator according to the present invention can be applied to a wide range of equipment that applies LED lighting, such as an article storage device with a door, as well as the application of LED lighting to a household or commercial refrigerator. It can be done.

The front view of the state which opened the door of the refrigerator in Embodiment 1 of this invention Sectional view on the AA line of FIG. 1 of the refrigerator in Embodiment 1 of the present invention. Sectional drawing which embedded the illuminating device in the side wall of the refrigerator in Embodiment 1 of this invention (BB sectional view taken on the line of FIG. 2) Directional characteristic diagram of light-emitting diode according to Embodiment 1 CC sectional view of the refrigerator in Embodiment 1 of the present invention in FIG. DD sectional view of the refrigerator according to Embodiment 1 of the present invention in FIG. Sectional drawing which installed the illuminating device in the side wall of the refrigerator in Embodiment 2 of this invention A perspective view of a conventional ice making machine lighting device Conceptual diagram of the lighting device of FIG. 8 installed on the top surface of the ice machine

Explanation of symbols

8 Refrigerator body 9 Refrigerated room 10 Ice making room 11 Switching room 12 Vegetable room 13 Freezer room 14 Lamp cover 15 Storage shelf 16 Specified low temperature room 17 Refrigerator side wall 18 First spacer 19 Inner recessed part 20 Second spacer 21 First angle LED
22 Second angled LED

Claims (8)

  In a heat-insulated storage room, the LED has a LED that irradiates the room, and a mounting board on which a plurality of the LEDs are mounted, and the irradiation direction of the LED is installed in the storage room with at least two angles. A refrigerator characterized by.   The refrigerator according to claim 1, further comprising a mounting substrate on which a plurality of LEDs are mounted, wherein the mounting substrate is embedded in the storage chamber or installed on an indoor wall surface.   The refrigerator according to claim 1 or 2, wherein the mounting board is disposed in at least one location including the upper, lower, left, and right rear surfaces and corners in the storage chamber.   4. The refrigerator according to claim 1, wherein one of the irradiation directions of the LEDs irradiates a back side of the storage room, and the other irradiates a front side of the storage room. 5. .   5. The refrigerator according to claim 4, wherein a boundary between a rear side and a front side in the irradiation direction of the LED is approximately ½ of a depth dimension.   The refrigerator according to any one of claims 1 to 5, wherein the mounting substrate is disposed in front of approximately a half of the interior depth dimension.   The refrigerator according to claim 1, wherein an angled spacer is provided between the LED and the mounting substrate, and the LED has an irradiation angle.   The refrigerator according to any one of claims 1 to 7, wherein the LED is mounted with alternately different illumination angles.

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