JP5172634B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator including an illumination device that illuminates a storage room.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator is equipped with a lighting device in the refrigerator compartment. The light source of the illuminating device is arranged at the center of the back of the refrigerator compartment and illuminates the refrigerator compartment.

Japanese Patent Laid-Open No. 10-47849 (page 3 to page 4, FIG. 2)

  However, according to the conventional refrigerator, the light source of the illuminating device is arranged only in the central part on the back of the refrigerator compartment, so that it is difficult for illumination light to reach every corner of the refrigerator compartment. For this reason, there is a case where it is difficult to visually recognize the stored item, and there is a problem that the convenience of the refrigerator is poor.

  An object of this invention is to provide the refrigerator which can improve the convenience.

  In order to achieve the above object, the present invention provides a refrigerator in which an illuminating device for illuminating a storage room for storing stored items is disposed at the upper end of the rear surface of the storage chamber. A light guide plate that faces the light source and guides light emitted from the light source to emit illumination light from the front emission surface toward the storage chamber, and is disposed on the side of the light guide plate and the light source It has a board mounted on the upper part, and a connecting part provided below the light source of the board and connected to a lead wire for supplying power to the light source.

  According to this configuration, the lighting device is disposed at the upper end of the back surface of the storage chamber, the substrate on which the light source is mounted is disposed on the side of the light guide plate, and the light source is disposed facing the side surface of the light guide plate. The substrate is provided with a connecting portion for connecting a lead wire below the light source. The light emitted from the light source enters the light guide plate from the side and is guided, and illumination light is emitted from the front emission surface to illuminate the storage chamber.

  In the refrigerator configured as described above, the lighting device may include a support member that supports a lower surface of the light guide plate and a reflective sheet that covers the upper surface of the light guide plate. According to this configuration, the light guide plate is installed on the support member, and the light guided by the reflection sheet covering the upper surface is reflected and guided to the output surface.

  Further, in the refrigerator having the above-described configuration, the refrigerator includes a storage portion that stores the substrate at one end of the support member, and the light source approaches the light guide plate in the substrate inserted from above into the storage portion. It is characterized by providing a guiding rib. According to this configuration, when the substrate is inserted into the storage unit from above, the light source approaches the light guide plate by the guidance of the ribs.

  In the refrigerator configured as described above, the light guide plate includes an inclined surface that is closer to the emission surface as the rear surface of the light guide plate is further away from the light source. According to this configuration, light incident from the side surface of the light guide plate is reflected forward by the inclined surface on the back surface and guided to the output surface.

  In the refrigerator having the above-described configuration, the present invention is characterized in that a reflecting plate that reflects light is provided below the lighting device, and the emission surface is disposed in front of the reflecting plate. According to this configuration, the illumination light emitted from the emission surface is reflected by the reflector made of metal or the like, and the storage chamber is illuminated in a wider range.

  According to the present invention, the illuminating device disposed at the upper end of the storage chamber has a light guide plate whose side faces the light source, and a lead wire connecting portion provided on a substrate erected by mounting the light source from the light source. Is also disposed below, the light exit surface of the light guide plate can be placed further upward. Thereby, the illumination in a storage chamber can be performed from the upper part of an upper end part, and illumination light reaches the whole storage chamber. Therefore, the convenience of the refrigerator can be improved.

  Further, the depth of the illumination device can be kept small by the light guide plate, and the emission surface can be formed long in one direction so that illumination light can be emitted from a wide range on the left and right, for example. Therefore, the volumetric efficiency can be improved by increasing the internal volume, and the illumination light can reach a wider range by reducing the light source that generates heat.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are an external perspective view showing a refrigerator according to an embodiment and a perspective view seen from the front in a state where a door is opened. In the refrigerator 1, a refrigerator compartment 6 is arranged at the upper part, and freezer compartments 8 and 9 are arranged below through a heat insulating wall 10. The freezer compartments 8 and 9 arranged on the left and right are partitioned by a vertical heat insulating wall 11. The refrigerator compartment 6 is opened and closed by the right door 2 and the left door 3, and the freezer compartments 8 and 9 are opened and closed by the right door 4 and the left door 5, respectively.

  Door pockets 2a and 3a for storing stored items are provided on the inner surfaces of the right door 2 and the left door 3 of the refrigerator compartment 6, respectively. In the refrigerator compartment 6, a plurality of placement shelves 12 on which stored items are placed are arranged. In the lower part of the refrigerator compartment 6, an isolation chamber 7 partitioned by a partition plate 13 is provided. A plurality of drawer-type storage cases 7 a for storing stored items are provided in the isolation chamber 7.

  An ice making device 8a is provided in the upper part of the right freezer compartment 8. An ice storage box 8b for storing ice is disposed below the ice making device 8a. A plurality of storage cases 8c for storing stored items are provided at the sides and below the ice making device 8a and the ice storage box 8b. Similarly, a plurality of storage cases 9 c are provided in the left freezer compartment 9.

  FIG. 3 is a side cross-sectional view showing a cross section passing through the freezer compartment 8 at the bottom of the refrigerator 1. A back duct 56 covered with a back plate 55 is formed between the heat insulating box 1 a forming the main body of the refrigerator 1 and the inside of the freezer compartment 8. The inside of the back duct 56 is divided into front and rear by a partition plate 56a, a plurality of back discharge ports 63 are opened on the front surface, and a cooler 57 is arranged on the rear side. A blower 58 is disposed above the cooler 57. The cooler 57 is connected to a compressor 59 disposed behind the freezer compartments 8 and 9. The refrigerant flows by driving the compressor 59 and the refrigeration cycle is operated, and the cooler 57 is on the low temperature side of the refrigeration cycle.

  The vertical heat insulating wall 11 is disposed in contact with the back plate 55 and is provided with first and second cold air ducts 71 and 73 communicating with the back duct 56. A bottom duct 75 communicating with the first cold air duct 71 is provided at the bottom of the freezer compartments 8 and 9. The bottom duct 75 is provided with a cold air return port 72 on the front surface, the back surface, and the side surface on the side away from the vertical heat insulating wall 11.

  Side discharge ports 74 that open toward the left and right freezer compartments 8 and 9 are provided at the front of the second cold air duct 73. In addition, the damper 65 provided in the heat insulation wall 10 is opened, and cold air is sent out to the cold air passage 27 (see FIG. 5) provided in the back surface of the refrigerator compartment 6.

  FIG. 4 shows a perspective view of the panel assembly 14 forming the back surface of the refrigerator compartment 6 as viewed from the front. 5 and 6 show a rear view and a side sectional view of the panel assembly 14. FIG. 7 is a detailed view of the main part of FIG. The panel assembly 14 is disposed above the isolation chamber 7 and forms a cool air passage 27 through which cool air flows on the back side.

  The panel assembly 14 includes a panel 15 made of a resin molded product. On the front side of the panel 15, a member 18 (reflecting plate) that is made of a good heat conductor such as metal (aluminum or stainless steel) and reflects light is disposed. . On both sides of the member 18, lamp covers 16 and 17 made of translucent resin are provided.

  An illumination chamber 20 a is formed integrally with the panel 15 at the center in the left-right direction at the upper end of the panel 15 and is provided above the member 18. Discharge ports 15a and 15b for discharging cool air are opened on the left and right of the illumination chamber 20a. The illumination device 20 is screwed into the illumination chamber 20a from the back. A cover 19 is provided above the illumination chamber 20a.

  A duct 28 formed of a foam heat insulating material is disposed on the back surface of the panel 15. The panel 15 is provided with an opening in which the member 18 is attached, and a duct 28 is provided in contact with the member 18. Around the duct 28, a frame member 28g that abuts against the heat insulating box 1a (see FIG. 3) is provided, and the outer shape of the cold air passage 27 is formed by the frame member 28g. The cold air passage 27 communicates with the damper 65 (see FIG. 3). The cold air generated by the cooler 57 due to the opening of the damper 65 circulates in the cold air passage 27 from below to above and is discharged into the refrigerator compartment 6 from the discharge ports 15a and 15b.

  The cold air passage 27 is divided into three in the left-right direction by ribs 32 projecting from the rear surface of the duct 28, and the right passage 29, the middle passage 30, and the left passage 31 are arranged in order from the right (from the left in the rear view of FIG. 5). Provided. The right passage 29, the middle passage 30, and the left passage 31 merge at the top.

  The end of the cold air passage 27 is formed by the upper wall 28c of the duct 28 formed by the upper end portion of the frame member 28g. The upper wall 28c of the duct 28 has a central portion 28f disposed below the right portion 28d and the left portion 28e. An illumination chamber 20a is formed above the central portion 28f, and discharge ports 15a and 15b are formed along the right portion 28d and the left portion 28e.

  As a result, the cool air rising in the middle passage 30 collides with the central portion 28f of the upper wall 28c, branches right and left, and is guided to the discharge ports 15a and 15b. Accordingly, the central portion 28f constitutes a shielding portion that blocks a part of the airflow in the cold air passage 27 and branches left and right.

  Further, an ion generation chamber 28a in which an ion generator 86 is disposed is formed integrally with the duct 28 in the vicinity of the central portion 28f. The heat insulating box 1a facing the ion generation chamber 28a is formed with a guide portion 27a composed of an inclined surface that guides cool air in the direction of the ion generation chamber 28a.

  8 and 9 show an exploded perspective view and a plan view of the lighting device 20. The lighting device 20 includes a base 21, a light guide plate 22, a substrate 23, and a reflection sheet 24. The base 21 (support member) is made of a resin molded product and supports the lower surface of the light guide plate 22 and covers both side surfaces and the back surface. A storage portion 21 a that stores the substrate 23 is formed at one end of the base 21.

  The light guide plate 22 is made of a transparent resin that extends in the left-right direction. The light guide plate 22 has an emission surface 22c on the front surface and an inclined surface 22b on the back surface side. The light guide plate 22 is disposed so as to protrude forward from the member 18, and the emission surface 22 c is disposed forward from the member 18.

  An LED 23a serving as a light source is mounted on the substrate 23. A part of the side surface of the light guide plate 22 faces the storage portion 21a, and the LEDs 23a are arranged to face each other. Further, the inclined surface 22b is inclined so as to be closer to the emission surface 22c as the distance from the LED 23a increases. As a result, the light emitted from the LED 23a enters the light guide plate 22 from the side, is guided through the light guide plate 22, is reflected by the inclined surface 22b, and is guided to the front output surface 22c facing the refrigerator compartment 6. The inside of the refrigerator compartment 6 is illuminated by the outgoing light from the outgoing surface 22c.

  Since the illuminating device 20 is arranged at the upper end of the refrigerating room 6, the illumination light can reach every corner in the refrigerating room 6. Further, since the emission surface 22 c protrudes forward from the member 18, the light traveling backward is reflected by the member 18. In addition, the light reflected by the wall surface of the refrigerator compartment 6 is reflected by the member 18. Thereby, the inside of the refrigerator compartment 6 can be illuminated more extensively.

  In order to obtain a wide area facing the LED 23a, the light guide plate 22 is formed with a recess 22a into which the tip of the LED 23a is inserted. The reflection sheet 24 is made of an aluminum foil bonded to the light guide plate 22 with a transparent adhesive material, reflects light leaking upward, and guides it to the emission surface 22c. It is more desirable to provide a similar reflective sheet on the inclined surface 22b or the lower surface of the light guide plate 22.

  10, 11, and 12 show a top view, a side view, and a front view of the substrate 23. The LED 23a is mounted on an upper portion of one surface of the substrate 23, and a connector 23c (connecting portion) is mounted on a lower portion of the same surface. Thereby, the light source 23a and the light guide plate 22 can be disposed above the refrigerator compartment 6. A thermistor 23b is mounted on the surface of the substrate 23 opposite to the LED 23a. A lead wire 25 (see FIG. 8) is connected to the connector 23c via a connector 25a (see FIG. 8), and power is supplied to the LED 23a and the thermistor 23b.

  A part of the storage portion 21a is opened and communicates with the inside of the refrigerator compartment 6, and the cold air in the refrigerator compartment 6 flows in and the temperature is detected by the thermistor 23b. Based on the detection result of the thermistor 23b, the damper 65 (see FIG. 3) is opened and closed to control the temperature in the refrigerator compartment 6. Accordingly, the LED 23a and the thermistor 23b are mounted on the substrate 23 to perform interior lighting and temperature control with a small volume, thereby improving the volumetric efficiency.

  At this time, the amount of heat generated can be reduced by using the LED 23a as a light source. Moreover, since the accommodating part 21a is arrange | positioned in the right outlet 15a vicinity, LED23a can be cooled. Thereby, the fall of the detection accuracy of the thermistor 23b by the heat_generation | fever of LED23a can be prevented.

  In addition, the thermistor 23b is attached below the LED 23a and attached to the surface opposite to the LED 23a. Thereby, the fall of the detection accuracy of the thermistor 23b by the heat_generation | fever of LED23a can further be prevented.

  FIG. 13 is a front sectional view of the lighting device 20. FIG. 14 is an enlarged view of a main part of FIG. The board | substrate 23 is inserted from the upper surface opening part of the accommodating part 21a, and is pinched | interposed and fixed by the ribs 21b and 21c provided in the accommodating part 21a. At this time, the connector 23c protruding from the board 23 passes between the protruding portion 21d protruding sideways from the lower surface of the base 21 and the inner wall of the storage portion 21a facing the protruding portion 21d. And the board | substrate 23 is guided to the left in the figure by the inclined surface formed in the upper surface of the rib 21b, and the board | substrate 23 is fixed between rib 21b, 21c.

  Thereby, the board | substrate 23 moves to the direction of the light-guide plate 22, and the front-end | tip of LED23a enters into the recessed part 22a (refer FIG. 9) of the light-guide plate 22. FIG. For this reason, LED23a approaches the recessed part 22a, and can transmit the light of LED23a to the light-guide plate 22 without leaking. Moreover, the light guide plate 22 side below the storage portion 21a is opened and the tip of the connector 23c is arranged. As a result, the connectors 23c and 25a can be easily connected, and an excessive stress can be prevented from being applied to the lead wire 25 (see FIG. 4). Note that the substrate 23 may be incorporated in the storage portion 21a after the connectors 23c and 25a are connected.

  Further, an insulating sponge-like spacer may be inserted between the substrate 23 and the inner surface of the storage portion 21a. Thereby, the backlash of the board | substrate 23 can be prevented and the space | interval of LED23a and the light-guide plate 22 can be stably maintained at a predetermined space | interval.

  As shown in FIG. 15, the illuminating device 20 may be provided with a plurality of LEDs 23a horizontally on a substrate 23 and a thermistor 23b disposed below the LEDs 23a. Thereby, the influence with respect to the thermistor 23b of the heat_generation | fever of LED23a can be reduced. At this time, as shown in FIG. 16, a thermistor 23b may be disposed below the adjacent LED 23a. Thereby, the thermistor 23b moves away from the LED 23a, and the influence of heat generation of the LED 23a can be further reduced. In the same manner as described above, it is more desirable to attach the thermistor 28b to the surface of the substrate 23 opposite to the LED 23a.

  In addition, behind the lamp covers 16 and 17 (refer FIG. 4), the illuminating device 20 of the same structure except the thermistor 23b is arrange | positioned. At this time, the light guide plate 22 extends vertically and the LEDs 23 a are arranged above or below the light guide plate 22. It is more desirable to arrange the LED 23a above the light guide plate 22 because the wiring 23 can be shortened because the substrate 23 of each of the left and right lighting devices 20 approaches the lighting device 20 at the upper center.

  17 and 18 show a front view and a side sectional view of the ion generator 86. The ion generator 86 is covered with a housing 86a made of an insulator, and needle-like discharge electrodes 86p and 86q are arranged apart from each other. An annular induction electrode 86e is disposed around the discharge electrodes 86p and 86q. In the ion generation chamber 28a (see FIG. 5), the discharge electrodes 86p and 86q are juxtaposed in the left-right direction, and are arranged away from each other in a direction intersecting the airflow rising in the cold air passage 27.

  The housing 86a is provided with a through hole 86b facing the discharge electrodes 86p and 86q. Thereby, the discharge electrodes 86p and 86q are exposed on the ion generation surface 86d. The through hole 86b faces the opening 28b (see FIG. 5) that opens facing the cold air passage 27 of the ion generation chamber 28a. Thereby, the discharge electrodes 86p and 86q are arranged facing the cold air passage 27.

  Ions generated in the ion generation part 86f between the discharge electrodes 86p, 86q and the induction electrode 86e are mixed with the cold air flowing into the ion generation chamber 28a and flow out into the cold air passage 27 from the opening 28b.

  A vent hole 86g having a filter 86h is formed between the through holes 86b on the ion generation surface 86d. The ventilation hole 86g communicates with the ion generation part 86d inside the housing 86a, and the cold air flowing into the housing 86a from the ventilation hole 86g flows out of the ion generation part 86d. For this reason, the ion which generate | occur | produced in the ion generation part 86f can be included in cold air, without stagnating.

  Note that the filter 86h isolates the left and right ion generators 86f, and the ion supply efficiency can be improved by reducing the disappearance due to the collision between the positive ions and the negative ions. You may provide the rib which isolates both between the ion generating parts 86f on either side.

  A positive or negative high voltage is applied to the discharge electrodes 86p and 86q with respect to the induction electrode 86e. As a result, positive ions and negative ions are generated, for example, by corona discharge in the ion generator 86f formed between the discharge electrodes 86p and 86q and the induction electrode 86e.

For example, a positive voltage is applied to one of the discharge electrodes 86p, and ions generated by ionization combine with moisture in the air to generate positive cluster ions whose charges mainly consist of H ⁺ (H ₂ O) m. A negative voltage is applied to the other discharge electrode 86q, and ions generated by ionization combine with moisture in the air to generate negative cluster ions mainly composed of O ₂ ⁻ (H ₂ O) n. Here, m and n are arbitrary natural numbers. H ⁺ (H ₂ O) m and O ₂ ⁻ (H ₂ O) n agglomerate and surround the surface of airborne bacteria, odorous components, and stored bacteria.

Then, as shown in the formulas (1) to (3), the active species [.OH] (hydroxyl radical) and H ₂ O ₂ (hydrogen peroxide) are aggregated and formed on the surface of the microorganism or the like by collision. Destroy airborne bacteria and odor components. Here, m ′ and n ′ are arbitrary natural numbers. Therefore, indoor sterilization and odor removal can be performed by generating positive ions and negative ions and discharging them from the discharge ports 15a and 15b.

H ⁺ (H ₂ O) m + O ₂ ⁻ (H ₂ O) n → OH + 1 / 2O ₂ + (m + n) H ₂ O (1)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ 2 OH + O ₂ + (m + m ′ + n + n ′) H ₂ O (2)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ H ₂ O ₂ + O ₂ + (m + m ′ + n + n ′) H ₂ O (3)

  The ion generator 86 includes needle-like discharge electrodes 86p and 86q and an induction electrode 86e, but may have other configurations. For example, as shown in FIG. 19, an ion generator in which a flat discharge electrode 86p is arranged on an ion generation surface 86d may be used. Further, as shown in FIG. 20, an ion generator having a needle-like discharge electrode 86p connected to a power supply unit 86j by a lead wire 86k may be used.

  In the refrigerator 1 having the above-described configuration, the cold air generated by heat exchange in the cooler 57 is guided to the front side of the rear duct 56 by driving the blower 58 and dispersed vertically from the plurality of rear discharge ports 63 provided in the rear plate 55. Then, it is discharged into the freezer compartments 8 and 9. The cool air discharged from the rear discharge port 63 is guided forward and flows around the storage cases 8c and 9c.

  Further, the cold air flowing through the second cold air duct 23 from the front side of the rear duct 56 is dispersed vertically from the plurality of side surface discharge ports 74 and discharged into the freezer compartments 8 and 9. The cool air discharged from the side discharge port 74 is guided in a direction away from the vertical heat insulating wall 11 and circulates around the storage cases 8c and 9c. The cold air flowing through the freezer compartments 8 and 9 flows into the bottom duct 75 through the cold air return port 72 and returns to the cooler 57 through the first cold air duct 71. Thereby, the inside of the freezer compartments 8 and 9 is cooled.

  When the damper 65 provided on the heat insulating wall 10 is opened, cold air is sent out to the cold air passage 27 provided on the back surface of the refrigerator compartment 6. The cold air passage 27 is formed across the left and right sides of the refrigerator compartment 6, and the passage is widened from the damper 65 to the left and right. As a result, the flow area of the cold air passage 27 is widened, so the flow rate of the cold air is reduced.

  The cold air flowing into the cold air passage 27 is dispersed and rises in the right passage 29, the middle passage 30, and the left passage 31. Ions generated by the ion generator 86 flow out of the ion generation chamber 28 a through the opening 28 b and are mainly included in the cold air that has passed through the middle passage 30. The cool air rising through the middle passage 30 is blocked by colliding with the central portion 28f of the upper wall 28c of the duct 28, and a vortex is generated and stirred.

  As a result, the ions are stirred by the vortex and are uniformly contained in the cold air. At this time, if positive ions are released from one of the two openings 86b and negative ions are released from the other, the positive ions and negative ions collide and decrease due to stirring. For this reason, positive ions are continuously released from one of the openings 86b and negative ions are continuously released from the other. As a result, the amount of ions generated is increased and the influence of the decrease due to the collision can be reduced as compared with the case where positive and negative ions are alternately generated by one discharge electrode.

  Further, the vicinity of the ion generator 86 in the middle passage 30 is guided by the guide portion 27a having an inclined surface so that the cold air is directed toward the ion generation chamber 28a. As a result, the cold air flows into the ion generation chamber 28a and flows out including the ions, so that the ions generated by the ion generator 86 easily flow out into the cold air passage 27.

  The cold air containing ions branches right and left by the central portion 28f of the upper wall 28c, is led to the discharge ports 15a and 15b, merges with the cold air that has passed through the right passage 29 and the left passage 31, and is discharged into the refrigerator compartment 6. Is done. The cool air discharged from the discharge ports 15a and 15b arranged in the upper part of the refrigerating chamber 6 flows down in the refrigerating chamber 6 to cool the stored items, and the inside of the refrigerating chamber 6 is sterilized by ions contained in the cold air.

  Further, the cold heat of the cold air flowing through the cold air passage 27 is transmitted to the member 18 through the duct 28. In addition, the cold air flowing down from the discharge ports 15 a and 15 b is transmitted to the member 18. Since the member 18 covering the back surface of the refrigerator compartment 6 is made of a good heat conductor, cold heat is released from the entire member 18. Thereby, the temperature distribution in the refrigerator compartment 6 can be made uniform. In order to increase the strength of the panel assembly 14, a wall surface of the panel 15 may be provided between the member 18 and the duct 28. Further, the amount of cold heat may be adjusted by adjusting the thickness of the duct 28 or the panel 15, and in some cases, the air may be opened to directly contact the member 18.

  Further, when the right door 2 or the left door 3 of the refrigerator compartment 6 is opened, outside air flows into the refrigerator compartment 6, and moisture contained in the outside air comes into contact with the member 18 to condense. Condensation of the member 18 evaporates after the right door 2 and the left door 3 are closed, and the inside of the refrigerator compartment 6 is moisturized. For this reason, while being able to reduce the drying of a store thing, the cluster ion couple | bonded with the water molecule can be enlarged. Thereby, since it becomes difficult to lose | disappear ion, ion can be conveyed to every corner of the refrigerator compartment 6. FIG.

  According to this embodiment, the illuminating device 20 arrange | positioned at the upper end part of the refrigerator compartment 6 has the light-guide plate 22 in which a side surface opposes LED23a (light source). Moreover, the connection part (connector part 23c) of the lead wire 25 provided in the board | substrate 23 standingly mounted by mounting LED23a is distribute | arranged below LED23a. For this reason, the output surface 20c of the light guide plate 20 can be installed further upward. Thereby, the illumination in the refrigerator compartment 6 can be performed from the upper part of an upper end part, and illumination light reaches the refrigerator compartment 6 whole. Therefore, the convenience of the refrigerator 1 can be improved.

  In addition, the light guide plate 22 can keep the depth of the illumination device 20 small, and the emission surface 20c can be formed long in the left-right direction so that illumination light can be emitted from a wide range on the left and right. Therefore, the volumetric efficiency can be improved by increasing the internal volume, and the illumination light can reach a wider range by reducing the light source that generates heat.

  The lighting device 20 includes a base 21 (supporting member) that supports the lower surface of the light guide plate 22 and a reflection sheet 24 that covers the upper surface of the light guide plate 20, so that light incident on the light guide plate 22 is reflected by the reflection sheet 24 and the base. 21 and can be guided to the exit surface 22c. Accordingly, it is possible to reduce light leakage and improve illumination efficiency.

  Further, since the ribs 21b for guiding the substrate 23 inserted from above into the housing portion 21a provided at one end of the base 21 in the direction in which the LEDs 23a approach the light guide plate 22 are provided, the LEDs 23a can be easily brought close to the light guide plate 22. Can be installed. Thereby, the emitted light of LED23a can be entered into the light-guide plate 22 without leaking.

  Further, since the light source is composed of the LED 23a, the heat generation can be reduced and the cooling efficiency can be improved. In addition, since the concave portion 22a into which the LED 23a enters is provided on the side surface of the light guide plate 22, the area of the light guide plate 22 facing the LED 23a increases, and light emitted from the LED 23a can be incident on the light guide plate 22 without leakage. Therefore, the illumination efficiency of the illumination device 20 can be further improved.

  In addition, since the rear surface of the light guide plate 22 is composed of the inclined surface 22b that approaches the output surface 23c as the distance from the LED 23a increases, the light that guides the light guide plate 22 is reflected by the inclined surface 22b and dispersed on the output surface 22c that extends to the left and right. Can be guided. Therefore, the illumination efficiency of the illumination device 20 can be further improved, and illumination light can be emitted uniformly.

  In addition, since the member 18 (reflecting plate) that reflects light is provided below the lighting device 20 and the light exit surface 22c of the light guide plate 22 is disposed in front of the member 18, the light traveling backward from the light exit surface 22c is a member. 18 is reflected. In addition, the light reflected by the wall surface of the refrigerator compartment 6 is reflected by the member 18. Thereby, the inside of the refrigerator compartment 6 can be illuminated more extensively.

  In this embodiment, positive ions and negative ions are released to the cold air passage 27 by the ion generator 86, but only negative ions may be released.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator provided with the illuminating device which illuminates a store room.

The external appearance perspective view which shows the refrigerator of embodiment of this invention The perspective view which shows the state which opened the door of the refrigerator of embodiment of this invention Side surface sectional drawing which shows the lower part of the refrigerator of embodiment of this invention The perspective view which shows the panel assembly of the refrigerator of embodiment of this invention The rear view which shows the panel assembly of the refrigerator of embodiment of this invention Side surface sectional drawing which shows the panel assembly of the refrigerator of embodiment of this invention Detailed view of the main part of FIG. The disassembled perspective view which shows the illuminating device of the refrigerator of embodiment of this invention. The top view which shows the illuminating device of the refrigerator of embodiment of this invention The top view which shows the board | substrate of the illuminating device of the refrigerator of embodiment of this invention. The side view which shows the board | substrate of the illuminating device of the refrigerator of embodiment of this invention. The front view which shows the board | substrate of the illuminating device of the refrigerator of embodiment of this invention. Front sectional drawing which shows the illuminating device of the refrigerator of embodiment of this invention. Detailed view of the main part of FIG. The front view which shows arrangement | positioning of the other light source on the board | substrate of the illuminating device of the refrigerator of embodiment of this invention. The front view which shows arrangement | positioning of the other light source on the board | substrate of the illuminating device of the refrigerator of embodiment of this invention. The front view which shows the ion generator of the refrigerator of embodiment of this invention Side surface sectional drawing which shows the ion generator of the refrigerator of embodiment of this invention The perspective view which shows the other ion generator of the refrigerator of embodiment of this invention. The perspective view which shows the other ion generator of the refrigerator of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 1a Heat insulation box 6 Refrigerating room 7 Isolation room 8, 9 Freezing room 10 Heat insulation wall 11 Vertical heat insulation wall 14 Panel assembly 15 Panel 15a, 15b Discharge port 18 Member 20 Lighting apparatus 20a Lighting room 21 Base 21a Storage part 22 Conduction Light plate 23 Substrate 23a LED
23b Thermistor 27 Cold air passage 27a Guide portion 28 Duct 28a Ion generation chamber 28b Opening portion 28c Upper wall 28f Center portion 29 Right passage 30 Middle passage 31 Left passage 55 Back plate 56 Rear duct 57 Cooler 58 Blower 59 Compressor 63 Rear outlet 65 damper 71 first cold air duct 72 cold air return port 73 second cold air duct 74 side discharge port 75 bottom surface duct 86 ion generator 86a housing 86b through hole 86d ion generation surface 86e dielectric electrode 86f ion generator 86g vent hole 86h filter 86p, 86q discharge electrode

Claims (5)

A refrigerator in which a lighting device for illuminating a storage room for storing stored items is disposed at the upper end of the back surface of the storage chamber , and a reflector for reflecting light is provided below the lighting device on the back surface of the storage room The illumination device includes a light source, a light guide plate whose side faces the light source, guides the light emitted from the light source, and emits the illumination light from the front emission surface toward the storage chamber, and the light guide plate. A substrate that is erected on the side of the optical plate and on which the light source is mounted is provided, and a connection portion that is provided below the light source of the substrate and that is connected to a lead wire that supplies power to the light source. And
The refrigerator is characterized in that the emission surface is arranged in front of the reflector and is formed on an inclined surface with the lower side inclined backward .   The refrigerator according to claim 1, wherein the lighting device includes a support member that supports a lower surface of the light guide plate and a reflection sheet that covers an upper surface of the light guide plate.   One end of the support member has a storage portion for storing the substrate, and a rib is provided for guiding the substrate inserted from above into the storage portion in a direction in which the light source approaches the light guide plate. The refrigerator according to claim 2.   The refrigerator according to any one of claims 1 to 3, wherein the light source is formed of an LED, and a recess into which the LED enters is provided on a side surface of the light guide plate.   The refrigerator according to any one of claims 1 to 4, wherein the refrigerator has an inclined surface that is closer to the emission surface as the rear surface of the light guide plate is farther from the light source.

Images