JP2008039355A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of degrading visibility of stored objects due to the vertical position relation of the stored objects in a refrigerator according to the directivity of light emitting diodes when using the light emitting diodes emitting wavelength in a visible light range, for illumination in the refrigerator. <P>SOLUTION: A mounting substrate 1 laterally mounted with a plurality of light emitting diodes 2 is disposed in a recess 5 installed in the refrigerator, with a fixed distance from the light emitting parts of the light emitting diodes 2 and frontward by the half of a depth dimension of the refrigerator interior 11, as a lighting system 20 at a top face wall surface in the refrigerator so that a lamp cover 7 covers the whole light emitting parts of the light emitting diodes 2. The formation of shadow in the vertical position relation of the stored objects in the refrigerator can thereby be suppressed to improve the visibility of the stored objects. <P>COPYRIGHT: (C)2008,JPO&INPIT

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. 6 is a perspective view of an illumination device for a conventional ice making machine described in Patent Document 1, and FIG. 7 is a conceptual diagram in which the illumination device of FIG. 6 is installed on the top surface of the ice making machine.

  In the illuminating device 30 of FIG. 6, the mounting substrate 1 has a flat plate shape, a circuit pattern (not shown) is formed on one surface or both surfaces, and an epoxy resin-based substrate or an insulating metal substrate with good thermal conductivity is used. The white LED 2 is formed in a bullet shape, and has a structure in which white light is obtained by exciting a fluorescent material using blue light from a GaN-based blue LED.

  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 light emitting diode 2 with a plurality of insertion holes arranged in parallel. Here, the light-emitting diode 2 is mounted with the energization terminal 3 inserted through the insertion hole of the heat insulating plate 4 and soldered to the circuit pattern of the mounting substrate 1, and a plurality of the light-emitting diodes 2 are arranged in parallel on the mounting substrate 1. In addition, when the emitted-heat amount of the light emitting diode 2 is small, you may abolish the heat insulation board 4. FIG.

  In FIG. 7, the lighting device 30 is disposed on the top surface 32 in the warehouse of the ice making machine 31.

  The operation of the refrigerator using the light emitting diode configured as described above as a lighting device will be described below.

First, when the refrigerator door is closed, the light emitting diode 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 light emitting diode 2, white 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: It is aggravated by shadows caused by the storage shelves themselves or the stored items placed on the storage shelves. 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.

  This invention solves the said conventional subject, and provides the refrigerator which has the illuminating device aiming at improving the visibility of preserved matter irrespective of the vertical position relationship of the preserved matter in a refrigerator. Objective.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is provided with a recess on the top wall of the refrigerator, and a mounting board on which a plurality of light emitting diodes that emit light in the visible light region are mounted. The disposed lighting device is disposed in front of half of the depth dimension in the cabinet.

  Thereby, since it can irradiate from a front with respect to a preservation | save thing as illumination in a refrigerator, a preservation | save thing front surface does not become a shadow, but visibility can further be improved.

  Moreover, the refrigerator of this invention irradiates the irradiation direction of the light emitting diode which is an illuminating means of an illuminating device toward the back surface direction in a store | warehouse | chamber.

  Thereby, the effect of irradiating the front surface of the stored item can be improved by utilizing the directivity characteristics of the light emitting diodes constituting the illumination device.

  In the refrigerator of the present invention, the lighting device is arranged in front of the top surface in the refrigerator cabinet, so that it is not affected by shadows due to the vertical position of the stored item, and the visibility of the stored item is improved even in the lower part of the cabinet. can do.

  The invention according to claim 1 provides a mounting board on which a plurality of light emitting diodes that emit light having a wavelength in the visible light region are mounted as an illumination device that irradiates the inside of the refrigerator by providing a recess on the top wall surface in the refrigerator. By disposing in the recess, a space in the refrigerator can be secured.

  According to a second aspect of the present invention, in the invention according to the first aspect, the lighting device having the mounting substrate is disposed in front of the half of the depth dimension in the storage, thereby preserving the storage in the storage. Since the object can be irradiated from the front surface, the front surface of the stored object is not shaded, and the visibility can be further improved.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the lighting device having the plurality of shelves in the vertical direction in the refrigerator and the mounting substrate is more than the front end of the shelf. By locating in front, the stored items on each shelf can be irradiated from the front, so the front of the stored items is not shaded and visibility can be further improved.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the irradiation direction of the light-emitting diode that is the illuminating means of the illuminating device irradiates toward the interior rear surface direction. Thus, the effect of irradiating the front surface of the stored item can be improved by utilizing the directivity characteristics of the light emitting diodes constituting the illumination device.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a front view of a state in which the door of the refrigerator in the first embodiment of the present invention is opened, FIG. 2 is a sectional view taken along the line BB of FIG. 1 in the same embodiment, and FIG. FIG. 4 is a directional characteristic diagram of the light-emitting diode according to the first embodiment, and FIG. 5 is a principal sectional view of the lighting device of the refrigerator according to the first embodiment.

  In FIG. 1 and FIG. 2, the refrigerator main body 10 configured to be insulated from the surroundings with a heat insulating material is divided into a plurality of compartments to form a storage room, and the uppermost part is a refrigerator compartment 11, The ice making room 12 and the first freezing room 13 are arranged side by side immediately below, followed by the vegetable room 15 and the second freezing room 14 at the bottom.

  The refrigerator compartment 11 is provided with a plurality of storage shelves 17 for organizing and storing stored items without overlapping, and is configured to be partially movable up and down. A specific low temperature chamber 16 is provided at the lowest level.

  The illuminating device 20 is disposed in a lateral direction on the top wall surface in front of the front end surface of the storage shelf 17 before ½ of the depth dimension of the interior 11 when viewed from the front side of the door opening in the refrigerator. ing.

  In FIG. 3, the illumination device 20 will be described in detail.

  The mounting substrate 1 has a flat plate shape, a circuit pattern (not shown) is formed on one surface or both surfaces, and an epoxy resin-based substrate or an insulating metal substrate having good thermal conductivity is used. The light-emitting diode 2 is formed in a bullet shape, and has a structure in which white light is obtained by exciting a fluorescent material using blue light from a GaN-based blue LED. 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 light emitting diode 2 with a plurality of insertion holes arranged in parallel. Here, the light-emitting diode 2 is mounted with the energization terminal 3 inserted through the insertion hole of the heat insulating plate 4 and soldered to the circuit pattern of the mounting substrate 1, and a plurality of the light-emitting diodes 2 are arranged in parallel on the mounting substrate 1. In addition, when the emitted-heat amount of the light emitting diode 2 is small, you may abolish the heat insulation board 4. FIG.

  Next, the mounting substrate 1 on which a plurality of light emitting diodes are mounted in the horizontal direction is held by a spacer 6 integrally molded with the outer frame 9 in a recess 5 provided in the refrigerator top wall 8. The lamp cover 7 is disposed as a lighting device 20 on the top wall of the refrigerator cabinet so as to cover the entire light emitting part of the light emitting diode 2 at a certain distance from the light emitting part.

  FIG. 4 is a graph showing the directivity of the light emitting diode 2 with respect to the light irradiation direction. Assuming that the irradiation direction is the vertical direction, the irradiation range is within a line. For example, at an irradiation amount of 1/2, the irradiation angle is 30 ° on each of the left and right sides as in D.

  In FIG. 5, the mounting substrate 1 and the light emitting diode 2 which is a white LED are held by the spacer 6 at an angle A with respect to the inner wall surface 16 of the interior 11, and this angle A is the directivity of the light emitting diode 2. It is an arbitrary value set so that the interior can be illuminated evenly, and is determined by the volume in the refrigerator compartment and the light emitting diode used, but the light is distributed in the rear direction of the interior where the light is hard to reach Is set to The angle A is preferably between 30 ° and 60 °. In particular, when a bullet-type light emitting diode is used, the angle is around 30 °.

  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 light emitting diode 2 is not energized and the interior is not illuminated. When the door is opened, a forward current flows through the light emitting diode 2 and white light is emitted. Up to this point, the operation is the same as that of the conventional example.

  Next, the white light emitted from the light emitting diode 2 travels to the lamp cover 7 and irradiates the inside of the cabinet. From the front of the top surface of the refrigerator cabinet, the irradiation is set by the directivity of the light emitting diode. Depending on the angle, it is emphasized with respect to the rear side direction of the inside of the cabinet, and light is distributed to the front and side surfaces of the stored item.

  As described above, in the present embodiment, the white light from the lighting device is diffused through the lamp cover 7 and irradiated from the front of the top surface of the refrigerator cabinet toward the stored items in the refrigerator. It is possible to suppress the occurrence of shadows due to the vertical position relationship of the stored items in the warehouse, and it is possible to improve the visibility of the stored items.

  Further, by mounting the diodes in a plurality of rows by extending the length of the mounting substrate 1 in the horizontal direction with respect to the inside of the refrigerator cabinet and extending in the vertical direction, the effect can be further enhanced.

  Moreover, since the lamp cover 7 contains a light diffusing material, the light emitted from the directional light-emitting diode is diffused by the lamp cover 7 to irradiate the inside of the cabinet. Irradiation with light can eliminate uneven illumination, and lighting performance can be further improved.

  Further, the lamp cover 7 is formed into a free shape by forming one material or a composite material of transparent resin such as epoxy, acrylic, polycarbonate, polyethylene, polystyrene, and polypropylene as a base material. As a result, an easy mounting design is possible, and the lighting device can be installed at an optimum position in the cabinet.

  As described above, the refrigerator according to the present invention is not only implemented when light-emitting diode illumination is applied to household or commercial refrigerators, but also a wide range of equipment that applies light-emitting diode illumination, such as an article storage device with a door. It can be applied to.

The front view of the state which opened the door of the refrigerator in Embodiment 1 of this invention BB sectional view of FIG. 1 in the same embodiment The principal part longitudinal cross-sectional view of the illuminating device of the refrigerator in the same embodiment Directional characteristic diagram of light-emitting diode according to Embodiment 1 Sectional drawing of the principal part of the illuminating device of the refrigerator in Embodiment 1 A perspective view of a conventional ice making machine lighting device Conceptual diagram of the lighting device of FIG. 6 installed on the top of the ice machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting board 2 Light emitting diode 5 Recessed part 10 Refrigerator main body 11 Refrigeration room 17 Storage shelf 20 Illumination device

Claims (4)

  A concave board is provided on the top wall surface in the refrigerator, and a mounting board on which a plurality of light emitting diodes emitting light having a wavelength in the visible light region are mounted is disposed in the concave section as an illumination device for irradiating the inside of the refrigerator. Refrigerator.   The refrigerator according to claim 1, wherein the lighting device having the mounting substrate is disposed in front of ½ of the interior depth dimension.   The refrigerator according to claim 1 or 2, wherein a lighting device having a plurality of shelves in a vertical direction in the refrigerator and having the mounting board is positioned in front of a front end portion of the shelf.   The refrigerator according to any one of claims 1 to 3, wherein an irradiation direction of a light emitting diode that is an illuminating unit of the illuminating device irradiates in a rearward direction in the cabinet.

Images