JP4481283B2 - refrigerator - Google Patents

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 issue element has been proposed for reasons such as low heat generation, no infrared wavelength, low voltage driving, etc., instead of a conventional incandescent light bulb.

  A light emitting diode (LED) is known as a typical example of a semiconductor issuance element, and a refrigerator using a conventional light emitting diode as a lighting device has a plurality of light emitting diodes arranged on a rectangular surface, There are some that are installed in the chamber and irradiated in the cabinet (for example, see Patent Document 1).

  FIG. 8 is a perspective view of a conventional lighting device for a refrigerator described in Patent Document 1, and FIG. 9 is a diagram illustrating a state in which the lighting device of FIG. 8 is installed on the top surface of the refrigerator.

  In the illuminating device 1 of FIG. 8, the mounting substrate 2 is a rectangular flat plate, a circuit pattern (not shown) is formed on one or both sides, and an epoxy resin substrate or an insulating metal substrate with good thermal conductivity is used. To do. The light emitting diode (white LED) 3 is formed in a cannonball 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. Derived.

  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 2 and the light emitting diode 3 with a plurality of insertion holes arranged in parallel. Here, the light-emitting diode 3 is mounted with the energization terminal 5 inserted through the insertion hole of the heat insulating plate 4 and soldered to the circuit pattern of the mounting substrate 2, and a plurality of the light-emitting diodes 3 are arranged in parallel on the mounting substrate 2. In addition, when the emitted-heat amount of the light emitting diode 3 is small, you may abolish the heat insulation board 5. FIG.

  In FIG. 9, the lighting device 1 is disposed on the top surface 8 in the refrigerator 7 whose front is opened and closed by the door 6.

  The operation of the refrigerator using the light emitting diode 3 configured as described above as a lighting device will be described below.

First, when the refrigerator door 6 is closed, the light emitting diode 3 is not energized and the interior is not irradiated. When the door 6 is opened, it is determined that the door is in an open state by an electronic switch such as a mechanical switch or a Hall IC, a forward current flows through the light emitting diode 3, white light is emitted, and the interior is irradiated.
JP 2001-082869 A

  However, in the above-described conventional configuration, since the lighting device 1 is disposed on the top surface 8 in the refrigerator 7, irradiation from the light emitting diode 3 is performed from the upper side to the lower side in the refrigerator, and the refrigerator is stored in the refrigerator. When there is a storage shelf that divides the interior of the storage shelf, the visibility of the stored items on the lower side of the storage shelf deteriorates due to shadows generated by the storage shelf itself or storage items placed on the storage shelf. 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 the case of a light bulb such as an incandescent lamp that has been used in the past, the lighting on the front side of the cabinet, that is, the door 8 side, can be expected to contribute to the lighting of a refrigerator installation space such as a kitchen, or the assembly structure can be simplified. In general, there are cases where the product is installed at a suitable location on the back of the cabinet and irradiated from the rear to the front of the cabinet. Since the front of the stored item is shaded, the viewing condition from the user side of the refrigerator 7 when the door 8 is opened is not good, and the contribution of lighting in the refrigerator installation space such as a kitchen is expected. However, it was difficult to achieve stable illumination with excellent visibility. And even if it replaces the light bulb installed in the back in this refrigerator with the light emitting diode with comparatively directivity, it does not come to solve the same subject.

  In this way, with respect to the arrangement of the illumination in the refrigerator, the top surface in the refrigerator can be used regardless of whether a conventionally used light bulb such as an incandescent lamp or a directional light emitting diode that has been attracting attention in recent years. Because it is installed on the back, it is easy for the user who wants to visually check the contents stored in the cabinet while standing in front of the refrigerator on the door 8 side. There was no lighting available.

  This invention solves the said conventional subject, and when the user sees from the door side front of a refrigerator, it is the structure of the illuminating device which can improve the visibility of the stored item in a refrigerator stably. It aims at providing the refrigerator which has.

In order to solve the above-described conventional problems, a refrigerator according to the present invention includes a rotary door, a door inner box provided to project inside the rotary door, and a door shelf provided in the door inner box. A shelf that partitions the interior of the refrigerator up and down, and an illumination device that irradiates the interior of the refrigerator, wherein the illumination device includes a mounting board on which a light emitting diode that emits a wavelength in the visible light region is mounted, the shelf in the refrigerator. It is arranged at an angle toward the rear of the interior of the recesses in the heat insulating material on both side walls of the section that is further forward and rearward from the tip that protrudes to the inner side of the inner box of the door. The irradiation direction and the irradiation angle of the light emitting diodes are determined so that the irradiation range of the light emitting diodes to be irradiated is an irradiation range including the entire surface of the shelf, and the rotary door is a double door. Open the left or right door, Side walls of the lighting apparatus in which were all as turned.

As a result, it is possible to irradiate a wide area in a form that almost covers the entire plane of the shelf as an irradiation range by combining the irradiation range from both front sides of the stored item as illumination in a refrigerator equipped with a double door. Compared to the case where a lighting device is provided on the back, when the user sees from the front side of the door, shadows are less likely to occur on any item placed on the shelf. A clear and clear lighting effect can be obtained stably, and the visibility of stored items can be improved.

  The refrigerator of the present invention, when viewed from the front side of the door by the user, is less likely to cause shadows on stored items placed on any position on the shelf, and has a stable and directional lighting effect. Therefore, the visibility of stored items can be improved, and usability can be improved. Moreover, the design property, appeal, and production effect as interior lighting can be enhanced, and a refrigerator having a lighting function with high added value can be provided.

According to the first aspect of the present invention, the rotary door, the door inner box protruding from the inner side of the rotary door, the door shelf provided in the door inner box, and the refrigerator are partitioned vertically. A shelf and a lighting device for illuminating the inside of the refrigerator, wherein the lighting device has a mounting board on which a light emitting diode emitting a wavelength in a visible light region is mounted in front of the shelf in the refrigerator and the door. The recessed portion in the heat insulating material on both side wall surfaces of the section that is behind the front end portion that protrudes to the inner side of the inner box is disposed with an angle toward the rear in the chamber, and the light emitting diode that is irradiated from the both side wall surfaces The irradiation direction and the irradiation angle of the light emitting diode are determined so that the irradiation range includes the entire surface of the shelf, and the rotary door is a double door, and either the left or right door Open the left and right side wall lighting devices It is also possible to illuminate a wide area by covering the entire plane of the shelf as the irradiation range by combining the irradiation range from both front sides of the stored item. Shadows are less likely to occur on storage items placed on any position on the shelf, and a clear and directional lighting effect can be stably obtained, improving the visibility of the storage items. can do.

According to a second aspect of the present invention, in the first aspect of the present invention, the irradiation range of the light emitting diodes on both side wall surfaces is close to the side wall surface opposite to the side wall surface on which the light emitting diodes are disposed. Of the front end surface of the shelf and the center portion of the rear end surface of the shelf in the width direction are determined so as to include at least an irradiation angle of the light emitting diode of 60 °. Are overlapped in a relatively balanced manner, and the entire plane of the shelf can be covered as a more uniform illumination area.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the irradiation direction of the light emitting diodes on both side walls overlaps the central line of the irradiation direction toward the central axis on the plane of the shelf. The irradiation direction of the light-emitting diodes on both side walls is the direction that effectively secures the illumination amount in the central area of the shelf that is frequently used, and the expansion of the irradiation range on the left and right of the central axis By utilizing this, the entire plane of the shelf can be covered as an illumination range.

The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein a plurality of the shelves are provided in a vertical direction in a refrigerator, and the lighting device includes a plurality of light emitting diodes. It is arranged in the vertical direction in the refrigerator across the shelf, can exhibit a more uniform lighting effect with high visibility across multiple stages, and can improve the ease of use such as putting in and out of stored items and confirmation .

The invention according to claim 5 is the invention according to claim 4 , wherein the light emitting diodes are arranged so as to face each other between the shelves, and the shelves are translucent shelves, It is possible to effectively illuminate the storage items placed on each shelf, and it is possible to expect supplementation of the irradiation amount by transmitting light from above and below between the shelves through the translucent shelves, so that it is more visible Highly uniform and uniform interior lighting can be provided.

  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)
FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a perspective view in which the door of the refrigerator in the same embodiment is opened. FIG. 3 is a longitudinal sectional view of the refrigerator in the same embodiment. FIG. 4 is a cross-sectional plan view of the refrigerator lighting device according to the embodiment. FIG. 5 is a longitudinal sectional view as seen from the back side of the lighting device of the refrigerator in the same embodiment. FIG. 6 is a directional characteristic diagram of the light emitting diode of the refrigerator in the same embodiment. FIG. 7 is a cross-sectional plan view of the interior showing the irradiation state of the refrigerator lighting device according to the embodiment.

  The heat insulation box 101 of the refrigerator is divided into a plurality of heat insulation compartments, and the door of the uppermost heat insulation compartment is of a rotary type, and the doors of the other heat insulation compartments are of a drawer type. That is, the refrigerator compartment 102 having a rotary door from the top (in this embodiment, a double door), the ice making chamber 103 and the specific cooling chamber 104 having a drawer type door arranged in the left-right direction at the lower part thereof, A vegetable compartment 105 having a drawer-type door at the lower part and a drawer-type freezing room 106 at the lower part are arranged.

  A plurality of storage pockets (door shelves) 108 are provided as storage spaces in the door inner box 109 in the rotary door 107 as a door of the refrigerator compartment, and a plurality of shelves 110 are provided in the refrigerator chamber 102 in the vertical direction in the room. Is divided into a plurality of vertical steps. The shelf 110 is a translucent shelf such as a transparent resin.

  The illumination device 112 including the light emitting diode 111 that emits a wavelength in the visible light region is in front of the front end of the shelf 110 and behind the front end of the door inner box 109 when viewed from the front of the refrigerator compartment 102. Each of the left wall surface and the right wall surface located between the sections D is disposed in the vertical direction across the shelf 110. A plurality of light emitting diodes 111 are provided in the vertical direction, and are installed so as to face the space between the shelves 110.

  Next, the lighting device 112 will be described in detail.

  The mounting substrate 113 has a flat plate shape, and a circuit pattern (not shown) is formed on one or both sides, and an epoxy resin-based substrate or an insulating metal substrate having good thermal conductivity is used. The light emitting diode 111 is a bullet-shaped one in this embodiment, but is not limited to this. And it is set as the structure which excites a fluorescent material using the blue light from GaN-type blue LED, and obtains white light. Here, the light emitting diodes 111 are mounted by soldering to the circuit pattern of the mounting substrate 113, and a plurality of the light emitting diodes 111 are arranged in parallel on the mounting substrate 113.

  A mounting substrate 113 on which a plurality of light emitting diodes 111 are mounted in the vertical direction is held by a spacer 115 and a claw 116 attached to a support member 114 having a substantially trapezoidal cross section. The supporting member 114 includes a stepped portion 119 provided around the hole 118 opened in the inner box 117 on both side walls of the refrigerator compartment, a stepped portion 121 provided around the recessed portion 120 in which the light emitting diode 111 of the supporting member is accommodated, Are fixed from the back side of the inner box 117 filled with the foam heat insulating material 123, and the outer peripheral surface of the lamp cover 122 is further overlapped with the stepped part 121 so that the lighting device does not protrude inside the cabinet as much as possible. ing.

  Here, the light-emitting diode 111 is mounted with the spacer 115 as a pedestal in the recess 120 via the mounting substrate 113, and emits light at an angle of the spacer 115 in consideration of a desired irradiation direction and irradiation range toward the rear of the interior. The mounting angle of the diode is adjusted, and the mounting portion of the spacer 115 of the support member is arranged as far as possible.

  The support member 114 is fixed by a built-in foam heat insulating material 123 from the inside of the heat insulating wall. Accordingly, the support member 114 can be easily positioned by the step portions 119 and 121, and the support member 114 can be easily incorporated in the manufacturing process. When the support member 114 is incorporated into the inner box 117 of the refrigerating chamber, it can be reliably incorporated by temporarily fixing the periphery with tape as a leak prevention when the foam heat insulating material 123 is injected.

  Further, the connector 124 is disposed at the lower part of the mounting board 113 so that the connector connection direction is from the bottom to the top, and the harness 125 is extended from the lower part of the mounting board 113 into the support member 114 and connected to the connector 124 from the lower side. is doing. Thereby, the height from the board | substrate of the connector 124 can be suppressed as much as possible, and the illuminating device 112 can be made compact. In addition, if the connection direction of the connector 124 is set from the bottom to the top, even if water enters the lighting device 112 or the board is condensed, water does not collect in the connector 124, and contact failure, etc. This specification has no cause for failure.

  In addition, a vacuum heat insulating material 126 is disposed in the side walls of the refrigerating chamber 102 in combination with the foam heat insulating material 123.

  The vacuum heat insulating material 126 is adhered and adhered to the outer box 126a side using an adhesive member (not shown). Further, the vacuum heat insulating material 126 is required to have a thin planar shape in order to be disposed within the thickness of the heat insulating box 101. Furthermore, an adhesive member such as hot melt is applied on the entire surface of the vacuum heat insulating material 126 so that air does not enter the bonded portion. The vacuum heat insulating material 126 is foamed integrally with the foam heat insulating material 123 to constitute the heat insulating box 101, and has a heat insulating performance 5 to 20 times that of the foam heat insulating material 123.

  Thereby, the heat insulation wall thickness of the refrigerator compartment side wall can be reduced as much as possible, and the capacity of the refrigerator compartment can be increased.

  In addition, you may insert the vacuum heat insulating material 126 in the 1st, 2nd, 3rd partition walls 127, 128, 129 and a back surface as needed.

For the core material of the vacuum heat insulating material 126, a material having a large specific gravity such as glass fiber, pearlite, or silica as an inorganic material is used. Whereas the density of the foam heat insulating material 123 (rigid urethane foam) is 20 to 50 kg / m ³ , the density of the vacuum heat insulating material 126 can be at least four times as ^{high as} 200 to 250 kg / m ³ .

  The lamp cover 122 is formed using one material or a composite material as a base material among transparent resins such as epoxy, acrylic, polycarbonate, polyethylene, polystyrene, and polypropylene, and supports the entire light emitting portion of the light emitting diode 111. The ribs 130 around the member 114 are fixed so as to be flush with the inner box 117 of the refrigerator compartment.

  FIG. 6 is a graph showing the directivity related to the light irradiation direction of the light emitting diode 111. If 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 30 ° on each of the left and right sides as in E.

  Next, it will be described how the illumination range extends in the refrigerating room 102, particularly with respect to the contents on the shelf 110.

  In FIG. 7, the lighting device 112 includes a mounting substrate 113 on which light emitting diodes 111 that emit wavelengths in the visible light region are mounted on both side walls in front of the shelf 110, and the light emitting diodes 111 that are irradiated from both side walls. The irradiation direction and the irradiation angle of the light emitting diode 111 are determined so that the irradiation range covers the entire surface of the shelf 110 together with the irradiation range.

  Further, the irradiation range of the light emitting diodes 111 on both side walls is such that the widthwise end of the front end surface of the shelf adjacent to the side wall surface facing the side wall surface on which the light emitting diode 111 is disposed, and the rear end surface of the shelf And at least a center portion in the width direction.

  Further, the irradiation range of the light emitting diodes 111 on both side wall surfaces is determined so that the irradiation angle is 45 ° or more and 90 ° or less in all angles.

  Further, the irradiation directions of the light emitting diodes 111 on both side wall surfaces are determined so that the center lines of the irradiation directions overlap toward the central axis on the plane of the shelf 110.

  The light emitting diodes 111 on the mounting substrate 113 are held by the spacers 115 and the claws 116 so as to irradiate toward the center of the shelf 110 of the refrigerator compartment, so that the interior can be irradiated evenly. In addition, since the irradiation direction of the light emitting diode 111 that uniformly irradiates the inside of the refrigerator cabinet changes slightly depending on the depth dimension and width dimension of the refrigerator, the irradiation amount from the light emitting diode 111 has an angle of 60 °, which is ½. It is better to determine the holding angle of the mounting substrate 113 so that the fan-shaped irradiation ranges (irradiation ranges L and R) can irradiate the farthest front end of the shelf 110.

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

  The rotary door 107 is a double-spreading double door 108, so that even when the refrigerating chamber 102 has a large capacity, the burden of opening and closing the door is reduced to almost half, and the front space associated with the opening of the door 107 is reduced. Even if the securing is small and the capacity is increased, the space occupied by the refrigerator can be kept compact.

  When the door 107 of the refrigerator is closed, the light emitting diode 111 is not energized and the interior is not irradiated. When one of the two doors 107 is opened, a forward current flows through the light emitting diode 111 in the lighting device 112 provided on the left and right wall surfaces in the refrigerator compartment 102, and white light is emitted. Is emitted.

  The white light emitted from the light emitting diode 111 travels to the lamp cover 122 and is irradiated into the cabinet, but the irradiation range on the entire plane of the shelf is obtained by combining the irradiation ranges from the front side surfaces of the stored items. As a cover, it can irradiate a wide area efficiently, and when the user sees it from the front side of the door, it is less likely to cause shadows on any item placed on the shelf and has directivity. A clear lighting effect can be obtained stably, and the visibility of the stored items can be improved.

  Further, at least a width direction end portion of the front end surface of the shelf adjacent to the side wall surface facing the side wall surface on which the light emitting diode 111 is disposed, and a width direction center portion of the rear end surface of the shelf are included. Therefore, the irradiation ranges from the wall surfaces on both sides are overlapped in a relatively balanced manner, and the entire plane of the shelf can be covered as a more uniform illumination area.

  In addition, since the irradiation range of the light emitting diodes 111 on both side wall surfaces is such that the irradiation angle is 45 ° or more and 90 ° or less in all angles, in the arrangement configuration in which the light emitting diodes 111 are provided on both front wall surfaces of the shelf 110. When the irradiation angle approaches 45 ° in all angles, it is possible to efficiently fit the entire plane of the shelf 110 within the illumination range while ensuring the irradiation amount by overlapping the irradiation ranges from both side walls. When the angle approaches 90 ° at all angles, the irradiation amount decreases, but the irradiation range reaches almost the entire plane of the shelf 110 only by irradiation on one side, and if irradiation is repeated from both sides, the irradiation amount is compensated. A relatively uniform lighting effect can be obtained on the shelf plane.

  Moreover, since the irradiation direction of the light emitting diode 111 on each side wall surface is determined so that the center line of the irradiation direction overlaps toward the central axis on the plane of the 110 shelf, the illumination amount of the central region of the shelf that is frequently used The illumination over the entire plane of the shelf 110 can be covered with the expansion of the illumination range on the left and right of the central axis.

  In addition, a plurality of shelves 110 are provided in the vertical direction in the refrigerator compartment 102, the mounting substrate 113 is provided in the vertical direction, and the plurality of light emitting diodes 111 are arranged in the vertical direction across the plurality of shelves 110, thereby being multi-staged. A more uniform lighting effect with high visibility can be exhibited, and usability such as putting in and out of stored items and confirmation can be improved.

  Further, since the lamp cover 122 contains a light diffusing material, the light emitted from the directional light emitting diode 111 is diffused by the lamp cover 122 to irradiate the interior of the lamp cover 122. Irradiation with white light can be eliminated and visual illumination unevenness can be eliminated, and the lighting performance can be further improved.

  Moreover, the lamp cover 122 is formed into a free shape by forming one material or a composite material of a transparent resin such as epoxy, acrylic, polycarbonate, polyethylene, polystyrene, or 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.

  Further, since the inner box 117 and the lamp cover 122 forming the heat insulating wall are in the same plane, the user can easily change the position of the shelf 110 and move the 110 shelf during cleaning, and also protrude into the cabinet. It doesn't look good.

  Further, the support member 114 has a substantially trapezoidal shape in which the other side is longer than the side holding the mounting substrate 113, and the height dimension of the support member 114 can be suppressed as much as possible, and a necessary heat insulating wall is secured and the support member. The condensation of 114 can be prevented. Furthermore, by taking a long side that does not hold the mounting substrate 113, the shadow of the support member 114 does not appear in the cabinet, and the visibility of stored items can be further improved.

  If the light emitting diodes 111 are located at positions facing each other between the shelves 110 as in the present embodiment and the shelves 110 are translucent shelves made of transparent resin or the like, the shelves at each stage It is possible to irradiate effectively the stored items placed on the top, and since the supplement of the irradiation amount by transmitting light from above and below between the shelves can be expected through the translucent shelf 110, the visibility is further improved. High and uniform interior lighting can be provided.

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

Front view of the refrigerator in Embodiment 1 of the present invention The perspective view which opened the door of the refrigerator of the embodiment Vertical sectional view of the refrigerator of the same embodiment Main part plane sectional drawing of the illuminating device of the refrigerator of the embodiment The principal part longitudinal cross-sectional view seen from the back side of the illuminating device of the refrigerator of the embodiment Directional characteristic diagram of light-emitting diode of lighting device of refrigerator in same embodiment Plan sectional drawing of the refrigerator compartment which shows the irradiation state of the illuminating device of the refrigerator of the embodiment A perspective view of a conventional lighting device The perspective view which shows the state which installed the conventional illuminating device in the refrigerator interior top surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Heat insulation box 102 Refrigerating room 110 Shelf 111 Light emitting diode 112 Illumination device 113 Mounting board 114 Support member 115 Spacer 117 Inner box 120 Recessed part 123 Foam insulation

Claims (5)

A rotary door, a door inner box protruding from the inner side of the rotary door, a door shelf provided in the door inner box, a shelf for vertically dividing the inside of the refrigerator, and the inside of the refrigerator are irradiated. A lighting device, and the lighting device has a mounting board mounted with a light emitting diode that emits a wavelength in the visible light region in front of the shelf in the refrigerator and a tip that protrudes to the inside of the door inner box. The surface of the shelf together with the irradiation range of the light emitting diodes radiated from the both side wall surfaces is disposed in the recesses in the heat insulating material on both side wall surfaces of the section that is rearward from the unit with an angle toward the rear in the cabinet. The irradiation direction and the irradiation angle of the light emitting diode are determined so as to be an irradiation range including the entire upper part, and the rotary door is a double door and the left and right doors are opened. All the lighting devices are turned on. The refrigerator.   The irradiation range of the light emitting diodes on both side walls is the width of the front end surface of the shelf adjacent to the side wall surface opposite to the side wall surface on which the light emitting diode is disposed, and the width of the rear end surface of the shelf. The refrigerator according to claim 1, wherein the center part of the direction is defined so as to include at least an irradiation angle of the light emitting diode of 60 °.   The refrigerator according to claim 1 or 2, wherein an irradiation direction of the light emitting diodes on both side wall surfaces is determined such that a central line of the irradiation direction overlaps toward a central axis on a plane of the shelf.   The said shelf is provided with two or more in the up-down direction in a refrigerator, and the said illuminating device is provided with two or more light emitting diodes, and has been arrange | positioned in the up-down direction in a refrigerator across these several shelves. Refrigerator.   The refrigerator according to claim 4, wherein the light emitting diodes are arranged so as to face each other between the shelves, and the shelves are translucent shelves.