JP4811210B2 - 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 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. 9 is a perspective view of an illumination device for a conventional ice making machine described in Patent Document 1, and FIG. 10 is a conceptual diagram in which the illumination device of FIG. 9 is installed on the top surface of the ice making machine.

  In the illuminating device 30 of FIG. 9, 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 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. 10, the lighting device 30 is disposed on the top surface 32 in the refrigerator 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 includes a supporting member that supports a mounting substrate on which a plurality of light emitting diodes that emit light having a wavelength in the visible light region are mounted on the left and right side walls in the cabinet, An illuminating device in which an opening surface of a support member is covered with a lamp cover is provided, and the illuminating device is configured such that the surface on which the support member supports the mounting substrate is inclined so that the surface on the near side is inside the cabinet. The inner box on both side surfaces is covered with foam heat insulating material, and the support member step provided on the peripheral edge of the support member and the inner box step provided on the both side wall surfaces of the inner box are fixed relative to each other. The light emitting diode is formed through the lamp cover by forming the other surface that does not support the mounting substrate behind the surface with respect to the surface that supports the mounting substrate so as to oppose the mounting substrate. Direct the light toward the back It is obtained as a possible elevation.

As a result, the interior lighting can be illuminated so as to cover almost the entire surface of the shelf from the front side of the stored items on the shelf, and compared with the case where the lighting device is provided on the ceiling surface, Since the occurrence of shadows due to the vertical position can be suppressed, the visibility of stored items can be improved even in the lower part of the cabinet, and further, a necessary heat insulating wall can be secured and condensation can be prevented.

  The refrigerator of the present invention is not affected by the shadows due to the upper and lower positions of stored items, as compared with the case where the lighting device is arranged on the ceiling surface by arranging the lighting device on the side wall surface in the refrigerator cabinet, The visibility of stored items can be improved even in the lower part of the cabinet, and the usability can be improved.

According to a first aspect of the present invention, there is provided a support member that supports a mounting substrate on which a plurality of light emitting diodes that emit wavelengths in the visible light region are mounted on both left and right wall surfaces in a warehouse, and an opening surface of the support member is a lamp. A lighting device covered with a cover is provided, and the lighting device is foamed in inner boxes on the left and right side surfaces by tilting the surface on which the support member faces the mounting substrate so as to be on the near side in the cabinet. The mounting of the support member is covered with a heat insulating material and fixed with the support member step provided on the peripheral edge of the support member and the inner box step provided on the both side wall surfaces of the inner box facing each other. By forming the other surface that does not support the mounting substrate behind the surface with respect to the surface that supports the substrate so as to face the substrate, the light of the light-emitting diode is moved rearward in the chamber through the lamp cover. It was also to so that it can be applied toward , And the storage of the refrigerator can be illuminated from the side, it is possible to suppress the occurrence of shadows caused by the vertical position of the storage material, it is possible to also improve the visibility of the stored product in the lower part of the refrigerator.

  Moreover, the height dimension of a support member can be suppressed as much as possible, a required heat insulation wall can be ensured, and dew condensation of a support member part can be prevented.

The invention according to claim 2 is the invention according to claim 1, wherein a plurality of shelves are provided in the vertical direction in the refrigerating chamber, and the light emission center lines of the light emitting diodes intersect on the shelves. The entire interior can be illuminated uniformly, and the visibility of stored items can be further improved. The invention according to claim 3 is the refrigeration according to claim 1 or 2. The door of the room is a double door, and the opening of the door can be kept to a minimum for taking out stored materials, and energy saving can be improved. Moreover, the door opening / closing burden is reduced to almost half, and the front space required for opening the door can be kept small, so that the substantial occupied space of the refrigerator can be kept compact even if the capacity is increased.

Those invention of claim 4 is the invention according to any one of claims 1 or 3, the irradiation direction of the light emitting diode is a lighting means of the lighting device, which irradiates toward the center of the shelf Thus, the entire interior can be illuminated uniformly, and the visibility of stored items can be further improved.

  According to a fifth aspect of the present invention, in the invention according to the third or fourth aspect, when at least one of the doors is opened, the lighting device disposed on both side wall surfaces is operated. The whole interior can be illuminated uniformly by irradiating from, and the visibility of preserved items can be further improved.

The invention according to claim 6 is the invention according to claim 2 or 4, wherein when the door is opened, only the lighting device on the opened door side is operated, so that the power consumption of the lighting device can be reduced by half and energy saving can be achieved. I can plan.

In the invention according to claim 7, in the invention according to claim 2 or 4, when the door is opened, only the lighting device on the door side that is closed is operated. Can be planned.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein a vacuum heat insulating material is provided in the heat insulating wall provided on the side surface of the refrigerating room. In addition, the insulation wall thickness of the side wall of the refrigerator compartment can be reduced as much as possible, and the capacity of the refrigerator compartment can be increased.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein the inner box forming the heat insulating wall and the cover made of transparent resin are in the same plane. , Customers can easily move the shelves during repositioning and cleaning.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein a connector is disposed at a lower part of the mounting board, and a connector connection direction is from bottom to top, The height of the lighting device can be reduced, the heat insulation wall thickness of the side wall of the refrigerator compartment can be further reduced, and the capacity of the refrigerator compartment can be increased. In addition, if the connector is connected from the bottom to the top, even if water enters the lighting device or the board condenses, the connector will not collect water, causing problems such as poor contact. There is no specification.

  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 shows a front view in which a revolving door of a refrigerator compartment according to Embodiment 1 of the present invention is a single-open type. FIG. 2 shows a front view in which the revolving door of the refrigerating compartment door according to Embodiment 1 of the present invention is a double-spread type. FIG. 3 shows a perspective view in which the revolving door of the refrigerator compartment door in the first embodiment of the present invention opens the door of the double door type refrigerator. FIG. 4 shows a longitudinal sectional view of the refrigerator compartment in the first embodiment of the present invention. FIG. 5 is a plan cross-sectional view of the main part of the illumination device according to Embodiment 1 of the present invention. FIG. 6 is a longitudinal sectional view of a main part as viewed from the back side of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 7 is a directional characteristic diagram of the light-emitting diode according to Embodiment 1 of the present invention. FIG. 8 is a cross-sectional plan view of the refrigerator compartment showing the irradiation state of the illumination device according to Embodiment 1 of the present invention.

  The heat insulating box 101 of the refrigerator is divided into a plurality of heat insulating compartments, and has a configuration in which the door of the uppermost heat insulating compartment is of a rotary type and the doors of other heat insulating compartments are of a drawer type. That is, the refrigerator compartment 102 having a rotary door from the top, the ice making chamber 103 and the specific cooling chamber 104 having a drawer type door arranged side by side in the left and right direction, and the vegetable room having a drawer type door in the lower part. 105, and a drawer-type freezer compartment 106 is disposed at the lower part thereof. The revolving door structure of the refrigerator compartment 102 includes a single door single door 107 shown in FIG. 1 and a double door double door 108 shown in FIG.

  Hereinafter, the refrigerator with the double doors will be described. From the top, the doors are a double door 108 in the refrigerator compartment, a drawer door 109 in the ice making room, a drawer door 110 in the specific cooling room, a drawer door 111 in the vegetable compartment, and a drawer door 112 in the freezer compartment.

  The revolving door 108 of the refrigerator compartment is provided with a plurality of storage pockets 108a as a storage space with the inner plate of the door inside, and a plurality of shelves 102a are provided in the room up and down, with the drawer at the bottom. A storage case 114, an egg storage container 115, and a water supply tank 116 for storing ice-making water are provided.

  The illumination device 140 including a light emitting diode that emits a wavelength in the visible light region is a section that is forward of the front end of the shelf 102a and rearward of the front end of the door inner plate 117 when viewed from the front in the refrigerator compartment 102. The left wall surface and the right wall surface positioned between D are respectively disposed in the vertical direction across the shelf 102a.

  The refrigerator compartment 102 is set to a refrigerated temperature zone with a temperature that does not freeze for refrigerated storage as a lower limit, and is usually set at 1 to 5 ° C. Further, in the lowermost storage space 113e, the storage case 114 may be a utility case that accommodates and uses small items that are frequently used in daily life, as well as improving the freshness of meat, seafood, etc. Therefore, the temperature may be slightly lower than the refrigeration temperature, for example, in the range of −3 to 1 ° C. On the other hand, the egg storage container 115 and the water supply tank 116 are maintained in a refrigerated temperature zone because it is necessary to avoid freezing of eggs and water.

  The ice making room 103 is an ice storage room having an independent door. The ice making room 103 is equipped with an automatic ice making device (not shown) for freezing, ice-making and de-icing the water supplied from the water supply tank 116 at the top of the room. Is automatically generated and stored. Although it is a freezing temperature zone for storing ice, it can be set at a relatively higher freezing temperature than the normal freezing temperature zone as long as it does not promote ice sublimation or ice sticking.

  The specific cooling chamber 104 may be set to any of a freezing temperature zone, a refrigeration temperature zone, and an intermediate temperature zone between refrigeration and refrigeration in terms of temperature, and a chilled (for example, −1 to 1 ° C.) as an intermediate temperature zone between refrigeration and refrigeration. ) And partial freezing (for example, −3 ° C. to −1 ° C.), etc., but also include a temperature range of refrigeration at −12 to −6 ° C. but weakly frozen for short-term storage. Can do. Moreover, it can also be set as the room | chamber which has specific functions, such as a high-humidity state, a dry state, thawing | decompression, rapid cooling, and cooking, and can be utilized as a highly functional and multi-use convenient room.

  A typical example is a temperature switching room in which the temperature zone setting can be switched by the user's setting, and can be set to a freezing temperature zone, a refrigeration temperature zone, or an intermediate temperature zone between freezing and refrigeration. As an intermediate temperature zone between freezing and refrigeration, in addition to a temperature zone such as chilled (for example, -1 to 1 ° C) and partial freezing (for example, -3 ° C to -1 ° C), for example, -12 to -6 ° C is frozen. The temperature zone can be switched arbitrarily depending on the application, including the temperature range of weak refrigeration with the temperature increased for short-term storage.

  The vegetable room 105 is often set to a temperature setting of 2 ° C. to 7 ° C., which is equal to or slightly higher than that of the refrigerator room 102. The lower the temperature, the less transpiration and respiration of leafy vegetables, and the freshness can be maintained for a long time.

  The freezer compartment 106 is set in a freezing temperature zone for frozen storage, and is normally set at −22 to −18 ° C., but in order to improve the frozen storage state, for example, −30 or −25 ° C. Sometimes set at low temperatures.

  Next, the illumination device 140 will be described in detail.

  The mounting substrate 141 has a flat and vertically long 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 142 is formed in a bullet shape and has a structure in which white light is obtained by exciting the fluorescent material using blue light from a GaN-based blue LED. Here, the light emitting diodes 142 are soldered and mounted on the circuit pattern of the mounting substrate 141, and a plurality of the light emitting diodes 142 are arranged on the mounting substrate 141 in the vertical direction.

  The mounting substrate 141 on which a plurality of light emitting diodes are mounted in the vertical direction is held by the spacer 144 and the claw 145 of the support member 143. The support member 143 has a substantially trapezoidal shape in which the other side is longer than the side holding the mounting substrate 141, and supports the stepped portions 146 provided around the support member 143 and both side walls of the inner box 147 of the refrigerator compartment. The side supporting the mounting substrate 141 is fixed to the stepped portion 148 provided to face the stepped portion 146 of the member 143 from the inner side of the heat insulating wall as far as possible, and fixed by the foamed heat insulating material 130. Accordingly, the support member 143 can be easily positioned by the respective step portions 146 and 148, and the support member can be easily incorporated in manufacturing. When the support member 143 is incorporated into the refrigerated compartment box 147, it can be reliably incorporated by temporarily securing the periphery with a tape to prevent the foam insulation 130 from leaking when the foam insulation 130 is injected.

  Further, the connector 160 is arranged at the lower part of the mounting board 141 so that the connector connection direction is from the bottom to the top, and the harness 161 is extended from the lower part of the mounting board 141 into the support member 143 and connected to the connector 160 from the lower side. is doing. Thereby, the height from the board | substrate of the connector 160 can be suppressed as much as possible, and the illuminating device 140 can be made compact. In addition, if the connector 160 is connected from the bottom to the top, even if water enters the lighting device 140 or the board is dewed, the connector does not collect water, and failure such as poor contact can occur. The specification has no cause.

  In addition, a vacuum heat insulating material 131 is disposed in the side walls of the refrigerator compartment 102 in combination with the foam heat insulating material 130.

  The vacuum heat insulating material 131 is adhered and adhered to the outer box 126 side using an adhesive member (not shown). Further, the vacuum heat insulating material 131 is required to be thin and flat in order to be disposed within the thickness of the heat insulating box 101. Further, an adhesive member such as hot melt is applied on the entire surface of the vacuum heat insulating material 131 so that air does not enter the bonded portion. The vacuum heat insulating material 131 is foamed integrally with the foam heat insulating material 130 to form the heat insulating box 101, and has a heat insulating performance 5 to 20 times that of the foam heat insulating material 130.

  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 131 in the 1st, 2nd, 3rd division wall 127,128,129 and a back surface as needed.

The vacuum heat insulating material 131 is made of a material having a large specific gravity such as glass fiber, pearlite, or silica as an inorganic material. The density of the foam heat insulating material 130 (rigid foamed urethane) is 20 to 50 kg / m ³ , while the density of the vacuum heat insulating material 131 is 200 to 250 kg / m ³ , which can be at least four times higher.

  The lamp cover 150 is formed using one material or a composite material of transparent resins such as epoxy, acrylic, polycarbonate, polyethylene, polystyrene, and polypropylene as a base material, and supports the entire light emitting portion of the light emitting diode 142. The ribs 151 around the member 143 are fixed so as to be flush with the inner box 147 of the refrigerator compartment.

  FIG. 7 is a graph showing the directivity of the light emitting diode 142 with respect to the light irradiation direction. Assuming that the irradiation direction is the vertical direction, the irradiation range is within a line.

  In FIG. 8, the light-emitting diodes 142 on the mounting substrate 141 are held by the spacers 144 and the claws 145 so as to irradiate toward the center of the shelf 102a of the refrigerator compartment 102, so that the interior can be irradiated uniformly. In addition, since the irradiation direction of the light emitting diode 142 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 142 has an angle of 60 °, which is ½. It is better to determine the holding angle of the mounting substrate 141 so that the fan-shaped irradiation ranges (irradiation ranges L and R) can irradiate the farthest front end of the shelf 102a.

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

  By adopting a double-spreading double door 108 as the revolving door, the burden of opening and closing the door 108 is reduced to almost half even when the capacity of the refrigerator compartment 102 is increased, and a front space is secured when the door 108 is opened. Is small, and even if the capacity is increased, the space occupied by the refrigerator can be kept compact.

  When the door 108 of the refrigerator is closed, the light emitting diode 142 is not energized and the interior is not illuminated. When one of the two doors 108 is opened, a forward current flows through the light emitting diodes 142 in the lighting device 140 provided on the left and right side walls of the refrigerator compartment, and white light is emitted. The

  Since the illuminating device 140 is provided on both side wall surfaces of the inner box 147 of the refrigerator compartment between the front end portion of the shelf 102a and the front end portion of the door inner plate 117 surrounding the side surface of the door storage pocket (door shelf) 108a. The white light emitted from the light emitting diode 142 proceeds to the lamp cover 150 and is irradiated obliquely rearward from the front side surface in the refrigerator compartment 102. The irradiation center line of the light emitting diode 142 is on the shelf 102a. Since the mounting substrate 141 is inclined and arranged on the support member 143 so as to intersect with each other, the irradiation range having a predetermined angular width centered on the irradiation center line from both side surfaces covers most of the shelf 102a. Therefore, it is possible to irradiate the entire surface of the shelf 102a with less unevenness from the front side of the stored item, and suppress the generation of shadows due to the vertical position of the stored item compared to the case where the lighting device is arranged on the ceiling surface. You It is possible, it can also be improved visibility of storage products in the lower part of the refrigerator.

  Furthermore, by irradiating toward the center of the shelf 102a, the entire interior is uniformly distributed, and in particular, the front and side surfaces of the stored items are emphasized and light distribution is performed. Thereby, generation | occurrence | production of the shadow by the up-and-down positional relationship of a preservation | save thing can be suppressed, and the visibility of a preservation | save thing can be improved.

  Moreover, the effect can be further enhanced by arranging the mounting substrate 141 across the shelf 102a in the vertical direction with respect to the inside of the refrigerator cabinet.

  Moreover, since the lamp cover 150 contains a light diffusing material, the light emitted from the directional light-emitting diode is diffused by the lamp cover 150 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 150 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.

  Further, since the inner box 147 and the lamp cover 150 forming the heat insulating wall 130 are in the same plane, the customer can easily change the position of the shelf or move the shelf when cleaning, and does not protrude into the cabinet. So it looks good.

  Further, the support member 143 has a substantially trapezoidal shape in which the other side is longer than the side holding the mounting substrate 141, the height dimension of the support member 143 can be suppressed as much as possible, and a necessary heat insulating wall is secured and the support member. Condensation of the portion 143 can be prevented. Furthermore, by taking a long side that does not hold the mounting substrate 141, the shadow of the support member does not appear in the cabinet, and the visibility of stored items can be further improved.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIG.

  Detailed description of the same configuration as that of the first embodiment will be omitted.

  When only one of the two doors of the refrigerator compartment door 108 is opened, only the lighting device 140 on the opened door side is operated. For example, when only the left door 108 is opened, the illumination range of the illumination device 140 is only L, and when only the right door is opened, the illumination range of the illumination device is only R.

  In many cases, the stored items that the customer opens by taking out the door on only one side are placed on the front side of the shelf 102a. From this point, sufficient illuminance can be obtained by operating only the nearby lighting device. The power consumption can be halved.

  Needless to say, when both doors are opened, the lighting devices on both sides operate to uniformly illuminate the entire interior.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIG.

  Detailed description of the same configuration as that of the first embodiment will be omitted.

  When only one of the two doors of the refrigerator compartment door 108 is opened, only the lighting device 140 on the closed door side is operated. For example, when only the left door 108 is opened, the illumination range of the illumination device 140 is only R, and when only the right door is opened, the illumination range of the illumination device is only L.

  Depending on the depth and width dimensions of the refrigerator, it may be more efficient to illuminate the entire interior of the refrigerator when only the distant lighting device on the closed door side is operated, Even in this case, the power consumption can be halved.

  Needless to say, when both doors are opened, the lighting devices on both sides operate to uniformly illuminate the entire interior.

  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.

Front view of a refrigerator in which the revolving door of the refrigerator compartment in Embodiment 1 of the present invention is a single-opening type Front view of revolving door of refrigerating room door according to Embodiment 1 of the present invention with double doors The perspective view which the rotation type door of the refrigerator compartment door in Embodiment 1 of this invention open | released the door of the double door type refrigerator The longitudinal cross-sectional view of the refrigerator compartment in Embodiment 1 of this invention Plan sectional drawing of the principal part of the illuminating device in Embodiment 1 of this invention. The principal part longitudinal cross-sectional view seen from the back | inner side of the illuminating device in Embodiment 1 of this invention. Directional characteristic diagram of light-emitting diode according to Embodiment 1 of the present invention Plan sectional drawing of the refrigerator compartment which shows the irradiation state of the illuminating device in Embodiment 1, Embodiment 2, Embodiment 3 of this invention A perspective view of a conventional lighting device Perspective view of a refrigerator with a conventional lighting device installed on the top of the cabinet

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Heat insulation box 102 Refrigerating room 102a Shelf 107 Single opening door of refrigerating room 108 Double door of refrigerating room 117 Door inner plate 131 Vacuum heat insulating material 140 Illuminating device 141 Mounting substrate 142 Light emitting diode 143 Support member 146 Step part 148 Step part 150 Lamp cover 160 Connector

Claims (10)

  Provided on both left and right wall surfaces in the cabinet are a support member for supporting a mounting substrate on which a plurality of light emitting diodes emitting light in the visible light region are mounted, and an illumination device in which the opening surface of the support member is covered with a lamp cover The lighting device is configured such that a surface on which the support member supports the mounting substrate is inclined so as to be on the near side in the cabinet, and the inner boxes on both the left and right side surfaces are covered with foam heat insulating material, and the support member The support member step provided on the peripheral edge of the inner box and the inner box step provided on the both side wall surfaces of the inner box are fixed relative to each other, and on the surface of the support member that supports the mounting substrate oppositely On the other hand, the other surface that does not support the mounting substrate behind the surface is formed long so that the light from the light emitting diode can be irradiated toward the rear in the cabinet through the lamp cover. A refrigerator characterized by that.   2. The refrigerator according to claim 1, further comprising a plurality of shelves in the vertical direction in the refrigerating chamber, wherein a light irradiation center line of the light emitting diodes intersects the shelves.   The refrigerator according to claim 1, wherein the door of the refrigerator compartment is a double door. The refrigerator according to claim 2 , wherein an irradiation direction of a light emitting diode that is an illuminating unit of the illuminating device irradiates toward a center of the shelf. The refrigerator according to claim 3 , wherein when at least one of the doors is opened, the lighting device disposed on both side wall surfaces is operated. 4. The refrigerator according to claim 3 , wherein when the door is opened, only the lighting device on the opened door side is operated. 4. The refrigerator according to claim 3 , wherein when the door is opened, only the door-side lighting device that is closed is operated. 5.   The refrigerator according to any one of claims 1 to 7, wherein a vacuum heat insulating material is provided in a heat insulating wall provided with the lighting device on a side surface of the refrigerator compartment.   The refrigerator according to any one of claims 1 to 8, wherein the inner box forming the heat insulating wall and the cover made of transparent resin are in the same plane.   The refrigerator according to any one of claims 1 to 9, wherein a connector is disposed at a lower portion of the mounting substrate, and a connector connection direction is from bottom to top.