JP5290845B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that discharges cold air from a discharge port formed in a cold air passage to a storage chamber.

  A conventional refrigerator is disclosed in Patent Document 1. In this refrigerator, a cooler is disposed below the refrigerating room, and a cool air passage through which the cool air generated by the cooler circulates is provided on the back of the refrigerating room. A plurality of discharge ports are arranged vertically in the cool air passage, and the cool air flowing into the cool air passage from the cooler by the drive of the blower is sequentially discharged into the refrigerator compartment from the discharge ports arranged below. Thereby, the refrigerator compartment is cooled.

Japanese Patent Laid-Open No. 5-60446 (page 3 to page 4, FIG. 3)

  However, according to the conventional refrigerator, the flow rate of the cold air is large on the cold air inflow side in the lower part of the cold air passage in order to allow the cold air to reach the upper discharge port. For this reason, there was a problem that cold air was vigorously discharged from the lower discharge port and sprayed on the stored item, and deterioration of the stored item was promoted. In addition, since cold air flowing down by its own weight is discharged more in the lower part than in the upper part of the refrigerator compartment, the refrigerator compartment is not uniformly cooled, resulting in poor cooling efficiency.

  An object of this invention is to provide the refrigerator which can improve cooling efficiency while preventing deterioration of a stored matter.

  In order to achieve the above object, the present invention includes a storage chamber for storing stored items, a cooler for generating cold air, a blower for sending the cool air generated by the cooler to the storage chamber, and the cooler. A refrigerator comprising: a cold air passage through which the generated cold air flows by driving the blower; and a discharge port that opens the storage chamber and discharges the cold air flowing through the cold air passage to the storage chamber. A first pressure chamber having a flow passage area widened downstream of the cooler; a narrowed portion communicating with the downstream side of the first pressure chamber to narrow the flow passage area; and a flow passage area communicating with the downstream side of the narrowed portion. The discharge port is provided in the second pressure chamber so as to extend in a direction in which the second pressure chamber is expanded with respect to the narrowed portion.

  According to this configuration, the cool air generated by the cooler flows into the first pressure chamber of the cool air passage by driving the blower. In the first pressure chamber, the flow path area is expanded, the dynamic pressure is converted into a static pressure, and the flow velocity is rapidly reduced. The cold air flowing out of the first pressure chamber flows into the second pressure chamber through the narrowed portion. In the second pressure chamber, the flow path area is expanded with respect to the constricted portion, the dynamic pressure is converted into a static pressure, and the flow velocity is further reduced. The cold air whose flow velocity has decreased in the second pressure chamber is discharged into the storage chamber from a discharge port formed so as to extend in the direction in which the second pressure chamber expands.

  According to the present invention, in the refrigerator configured as described above, the discharge port includes a plurality of openings arranged side by side in a direction in which the second pressure chamber is expanded with respect to the narrowed portion.

  According to the present invention, in the refrigerator configured as described above, the cold air passage is provided in a back surface of the storage chamber, the narrowed portion has a flow path area narrowed along the back surface of the storage chamber, and the first and second pressure chambers Is characterized in that the flow path area is expanded along the back surface of the storage chamber. According to this configuration, the cold air passage is widened, for example, in the left-right direction along the back surface in the first pressure chamber, and narrowed at the narrowed portion. For example, the second pressure chamber is expanded in the left-right direction with respect to the narrowed portion, and the discharge port is formed to extend in the left-right direction.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the second pressure chamber is disposed above the first pressure chamber, and the discharge port is provided over the left and right upper portions of the back surface of the storage chamber.

  In the refrigerator configured as described above, the upper wall of the second pressure chamber may have a central portion disposed below the left portion and the right portion, and the narrow portion may be disposed opposite the central portion. The airflow flowing into the second pressure chamber is blocked and branched to the left and right, and the discharge port is arranged along the left part and the right part.

  According to this configuration, the cold air flowing from the first pressure chamber into the second pressure chamber via the constriction collides with the central portion of the upper wall of the second pressure chamber, branches to the left and right, and is arranged above the central portion. It is led to a discharge port arranged along the left and right portions of the upper wall.

  Moreover, the present invention is characterized in that in the refrigerator configured as described above, an illuminating device for illuminating the storage chamber is provided between the left part and the right part above the central part. According to this configuration, the storage room is illuminated by the lighting device from the upper center of the storage room.

  Moreover, the present invention is characterized in that in the refrigerator configured as described above, a member made of a good thermal conductor covering the back surface of the storage chamber is provided below the discharge port. According to this configuration, the cold air flowing through the cold air passage and the cold air discharged from the discharge port are transmitted to the member and released into the storage chamber. Further, moisture contained in the outside air that flows in when the door is opened condenses on the member, evaporates in the storage chamber, and the storage chamber is moisturized.

  According to the present invention, the cold air passage has the first pressure chamber whose flow area is widened downstream of the cooler and the second pressure chamber connected to the first pressure chamber via the narrowed portion, and the discharge port is narrowed. Since the second pressure chamber is formed so as to extend in the direction of expanding the second pressure chamber, the cold air flowing through the cold air passage is decelerated by converting the dynamic pressure into a static pressure in the first pressure chamber and the second pressure chamber. The decelerated cold air is uniformly supplied from a wide range into the storage chamber by the discharge port extending in the direction in which the second pressure chamber expands. Therefore, the storage chamber can be uniformly cooled to improve the cooling efficiency. Further, since the first and second pressure chambers are expanded along the wall surface of the storage chamber, it is possible to secure a large volume of the storage chamber and reduce the cool air.

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. HH sectional view of FIG. AA sectional view 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 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.

  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 are a rear view and a side sectional view of the panel assembly 14, and FIG. 7 is a detailed view of the main part of FIG. 6. The panel assembly 14 is disposed above the isolation chamber 7 (see FIG. 2), 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, and a member 18 made of a good heat conductor such as metal (aluminum or stainless steel) is disposed on the front side of the panel 15. On both sides of the member 18, lamp covers 16 and 17 made of translucent resin are provided. A gap 12 a is formed between the member 18 and the mounting shelf 12.

  An illumination chamber 20 a is formed integrally with the panel 15 at the center in the left-right direction at the top of the panel 15. 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 similar illumination device having LEDs is also arranged behind the lamp covers 16 and 17.

  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.

  A first pressure chamber 27b is formed in the lower portion of the cool air passage 27. The first pressure chamber 27b has a channel area that is widened in the left-right direction along the back surface of the refrigerator chamber 6 with respect to the channel of the damper 65. The cold air flowing into the first pressure chamber 27b from the damper 65 is converted into a static pressure by the expansion of the flow path area, and the flow velocity is rapidly reduced.

  The first pressure chamber 27b is divided into three in the left-right direction by ribs 32 projecting from the back surface of the duct 28, and the right passage 29, the middle passage 30, and the left passage in order from the right (from the left in the rear view of FIG. 5). 31 is provided. At the upper end of the first pressure chamber 27b, a narrowed portion 27c is provided in which the flow path is narrowed by a rib 28h extending in the left-right direction. The cold air that branches right and left and flows through the right passage 29, the middle passage 30, and the left passage 31 joins at the upper part and passes through the narrowed portion 27c.

  In the upper part of the cold air passage 27, a second pressure chamber 27d is provided which extends again from the narrowed portion 27c to the left and right. The upper wall 28c of the duct 28 formed by the frame material 28g has a central portion 28f facing the narrow portion 27c below the right portion 28d and the left portion 28e. An illumination chamber 20a is formed between the right part 28d and the left part 28e above the central part 28f, and the discharge ports 15a and 15b are formed extending in the left-right direction along the right part 28d and the left part 28e.

  As a result, the cold air that has passed through the constricted portion 27c collides with the central portion 28f of the upper wall 28c and branches to the left and right, and the dynamic pressure is converted into a static pressure by the second pressure chamber 27d spreading to the left and right, further reducing the flow velocity. . As a result, static pressure is applied substantially uniformly in the vicinity of the discharge ports 15a and 15b, and the discharge ports 15a and 15b are uniformly discharged from a wide range on the left and right sides into the refrigerator compartment 6.

  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 constriction 27c of the second pressure chamber 27d. The back surface of the ion generation chamber 28a is composed of an inclined surface 28k whose upper portion is inclined forward. Further, the discharge ports 15a and 15b are disposed in front of the inclined surface 28k. Accordingly, the cold air flowing through the cold air passage 27 flows along the inclined surface 28k and is smoothly guided to the discharge ports 15a and 15b.

  The heat insulating box 1a facing the ion generation chamber 28a is formed with a guide portion 27a made of an inclined surface that guides cold air toward the ion generation chamber 28a on the upstream side of the ion generation chamber 28a. The flow path of the cold air led to the ion generation chamber 28a is narrowed by the guide portion 27a. The cold air passing through the narrowed portion 27c has a narrow flow path, so that the flow velocity is increased, and a lot of cold air flows along the inclined surface 28k. Further, the flow of the cold air flowing along the inclined surface 28k is narrowed by the guide portion 27a, and the flow velocity is further increased. Thereafter, the cold air branches and spreads left and right, and the flow velocity decreases.

  Thereby, cold air can be circulated in the vicinity of the ion generation chamber 28a, and ions can be included in the entire cold air passing through the second pressure chamber 27d. In addition, there is a limit to the amount of ions that can be contained per unit flow rate. For this reason, the ions generated by the ion generator 86 can be sufficiently contained in the cold air without being saturated by the speed increase of the cold air, and can be diffused and guided to the discharge ports 15a and 15b.

  FIG. 8 shows a cross-sectional view taken along the line HH of FIG. The second pressure chamber 27d protrudes forward by a horizontal surface 27e on the side of the ion generation chamber 28a, and the discharge ports 15a and 15b are disposed forward of the inclined surface 28k. For this reason, much cold air that flows through the narrowed portion 27c and flows along the inclined surface 28k is branched left and right by the central portion 28f and spreads in the front-rear direction. Thereby, the dynamic pressure of more cold air can be converted into a static pressure, and the flow rate of cold air can be further reduced. For this reason, the cold air containing ion can be more uniformly discharged to the refrigerator compartment 6 from the discharge outlets 15a and 15b.

  In addition, when the flow velocity becomes too fast at the constricted portion 27c and the guide portion 27a and a vigorous vortex is generated, the generation of noise and the reduction in the number of ions due to collision between ions become remarkable. In this case, in order to moderate the spread in the front-rear direction, an inclined surface made of a flat surface or a curved surface inclined from the narrowed portion 27c toward the discharge ports 15a, 15b may be provided on the horizontal surface 27e.

  In FIG. 5, the member 18 has a wider width than the duct 28, and a temperature sensor 35 (temperature detection means) is disposed on the rear side of the member 18 on the side of the duct 28. FIG. 9 shows a cross-sectional view taken along the line AA of FIG. A hole portion 35a is formed in the panel 15 so as to open, and a locking portion 35b having a curved shape protruding rearward is integrally formed around the hole portion 35a.

  The columnar temperature sensor 35 expands the locking portion 35b from the back side by elasticity, is pushed into the hole 35a, and contacts the member 18. At this time, the locking portion 35b urges the temperature detecting means 35 toward the front member 18 by elasticity. Thereby, the temperature sensor 35 can be reliably adhered to the member 18.

  The temperature sensor 35 detects the temperature of the member 18, and the damper 65 (see FIG. 3) is opened and closed and the compressor 59 (see FIG. 3) is turned on and off based on the detection result of the temperature sensor 35. Thereby, discharge of the cold air of the refrigerator compartment 6 is controlled.

  Since the temperature sensor is provided in contact with the member 18, the temperature in the refrigerator compartment 6 can be made uniform by the cold heat released from the member 18 maintained at a uniform temperature. Moreover, since the temperature sensor 35 can detect the average temperature of the refrigerator compartment 6 in contact with the member 18, the temperature of the refrigerator compartment 6 can be accurately controlled and efficient cooling storage can be performed. Therefore, the stored product can be stored at an appropriate temperature, and the energy saving property can be improved.

  10 and 11 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 is made of a resin molded product, and a storage portion 21a for storing the substrate 23 is formed at one end. The light guide plate 22 is made of a transparent resin, and has an emission surface 22c on the front surface and an inclined surface 22b on the back surface side.

  Light emitted from the LED 23a mounted on the substrate 23 is guided through the light guide plate 22, reflected by the inclined surface 22b, and guided to the output surface 22c. The inside of the refrigerator compartment 6 is illuminated by the outgoing light from the outgoing surface 22c. 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.

  12, 13, and 14 show a top view, a side view, and a front view of the substrate 23. The LED 23a is mounted on one surface of the substrate 23, and the connector 23c is mounted on the same surface. A lead wire 25 (see FIG. 10) is connected to the connector 23c via a connector 25a (see FIG. 10), and power is supplied to the LED 23a.

  FIG. 15 is a front sectional view of the lighting device 20. FIG. 16 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. 11) of the light-guide plate 22. FIG. For this reason, LED23a can transmit the light which approaches the recessed part 22a 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. 5). 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.

  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 arranged in the vertical direction, the discharge electrode 86p is arranged upward, and the discharge electrode 86q is arranged downward. That is, the ion generator 86k (see FIG. 17) having the discharge electrode 86q is arranged farther from the central portion 28f serving as a shield than the ion generator 86j (see FIG. 17) having the discharge electrode 86p.

  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 portions 86j and 86k between the discharge electrodes 86p and 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 air hole 86g communicates with the ion generator 86d inside the housing 86a. When the ion generation surface 86d is arranged away from the back surface of the ion generation chamber 28a, the cold air that has flowed into the housing 86a from the vent hole 86g flows out from the ion generation portion 86d. For this reason, the ion which generate | occur | produced in the ion generation parts 86j and 86k can be included in cold air, without stagnating.

  The filter 86h isolates the left and right ion generators 86j and 86k, thereby reducing the disappearance due to the collision between positive ions and negative ions and improving the ion supply efficiency. You may provide the rib which isolates both between the ion generating parts 86j and 86k 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 are generated, for example, by corona discharge in the ion generator 86j formed between the discharge electrode 86p and the induction electrode 86e disposed above. Further, negative ions are generated, for example, by corona discharge in the ion generating portion 86k formed between the discharge electrode 86q and the induction electrode 86e disposed below.

A positive voltage is applied to one discharge electrode 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 generating device in which planar discharge electrodes 86p and 86q (86q not shown) are arranged on an ion generating surface 86d may be used. Moreover, as shown in FIG. 20, the ion generator which has the acicular discharge electrodes 86p and 86q (86q is not shown) connected to the power supply part 86m by the lead wire 86n may be sufficient.

  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 first pressure chamber 27 b provided in the lower part of 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 first pressure chamber 27b is dispersed and rises in the right passage 29, the middle passage 30, and the left passage 31, merges at the upper portion, and flows into the second pressure chamber 27d through the narrowed portion 27c. Ions generated by the ion generator 86 flow out of the ion generation chamber 28a through the opening 28b, and are included in the cold air that has been accelerated through the constriction 27c. The cool air rising along the ion generation chamber 28a is blocked by colliding with the central portion 28f of the upper wall 28c of the duct 28.

  At this time, a vortex is generated and the ions are stirred by the vortex and are uniformly contained in the cold air. Further, negative ions are released from the upstream side of the two openings 86b and positive ions are released from the downstream side. 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 is guided by the guide portion 27a formed of 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 left and right by the central portion 28f of the upper wall 28c, and the flow velocity is further decelerated by the second pressure chamber 27d spreading forward and backward and left and right. And it discharges in the refrigerator compartment 6 from the discharge ports 15a and 15b which spread in the left-right direction. 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. Thereby, the store and the inside of the refrigerator compartment 6 can be kept clean, and the refrigerator 1 suitable for cold preservation can be realized.

  The discharge ports 15a and 15b may be formed by arranging a plurality of openings in the left-right direction. Thereby, while being able to supply cold air from the required place in the refrigerator compartment 6, the intensity | strength of the panel 15 of the discharge ports 15a and 15b vicinity can be improved. In addition, the distance from the narrowed portion 27c to the central portion 28f cannot be long, and the discharge amount from the discharge ports 15a and 15b arranged near the narrowed portion 27c may increase. At this time, the opening area of each independent opening can be reduced to easily make the discharge amount appropriate.

  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, cold air flowing down from the discharge ports 15 a and 15 b is transmitted to the member 18. In addition, when a stored item is newly placed on the mounting shelf 12, the heat of the stored item is transferred to the member 18. At this time, since the gap 12a is formed between the mounting shelf 12 and the member 18, the cool air flows down along the member 18, and the warm air rises. Thereby, the cold heat of cold air and the heat of stored goods can be reliably 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, the temperature is rapidly equalized when cold air or heat of stored items is applied. Then, cold heat or heat is released from the entire member 18, and the member 18 is maintained at an average temperature of the refrigerator compartment 6. Thereby, the temperature distribution in the refrigerator compartment 6 can be made uniform. For this reason, cooling efficiency improves and energy saving property can be improved. The temperature sensor 35 detects the temperature of the member 18 that is the average temperature of the refrigerator compartment 6, and the discharge of the cold air in the refrigerator compartment 6 is controlled based on the detection result.

  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 a 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.

  In addition, when the unevenness | corrugation by bending is provided in the front surface of the member 18, the dew condensation water which flows down on the member 18 can be collected on the surface which faced the upwards of the unevenness, and a moisturizing effect can be improved more. The unevenness can be easily formed by bending by pressing or drawing.

  According to the present embodiment, the cool air passage 27 has a first pressure chamber 27b whose flow area is expanded downstream of the cooler 57 and a second pressure chamber 27d connected to the first pressure chamber 27b via the constriction 27c. Therefore, the cold air flowing through the cold air passage 27 is decelerated by converting the dynamic pressure into a static pressure in the first pressure chamber 27b and the second pressure chamber 27d. The decelerated cold air is uniformly supplied into the refrigerating chamber 6 (storage chamber) from a wide range by the discharge ports 15a and 15b extending in the direction in which the second pressure chamber 27d expands. Therefore, the refrigerator compartment 6 can be uniformly cooled to improve the cooling efficiency. Moreover, since the 1st, 2nd pressure chambers 27b and 27d are extended along the back surface of the refrigerator compartment 6, the volume of the refrigerator compartment 6 can be ensured widely and cold air can be decelerated.

  Although the second pressure chamber 27d extends in the left-right direction and the discharge ports 15a, 15b extend in the left-right direction with respect to the narrowed portion 27c, other configurations may be used. For example, when the second pressure chamber 27d extends in the vertical direction with respect to the narrowed portion 27c, the same effect can be obtained by forming the discharge port extending in the vertical direction. That is, it is only necessary that the discharge port is provided so as to extend in the direction in which the second pressure chamber 27d is expanded with respect to the narrowed portion 27c.

  Further, after the second pressure chamber 27d expands in the left-right direction with respect to the narrowed portion 27c, for example, a cold air passage may be formed that bends in the vertical direction at the left and right ends and extends in the vertical direction. And by providing a discharge port in the part extended in the up-down direction, cold air can be more disperse | distributed and discharged, and the refrigerator compartment 6 can be cooled more uniformly. The second pressure chamber 27d may be provided independently on the left and right.

  In addition, the second pressure chamber 27d is disposed above the first pressure chamber 27b, and the discharge ports 15a and 15b are provided on the left and right sides of the upper part of the back side of the refrigerator compartment 6, so that the cold air is discharged from a wide range above the refrigerator compartment 6. Thus, the refrigerator compartment 6 can be cooled more uniformly.

  In addition, the upper wall 28c of the second pressure chamber 27d has a central portion 28f disposed below the left portion 28c and the right portion 28d, and the constricted portion 27c is disposed opposite to the central portion 28f so as to face the second pressure chamber. Since the airflow flowing into 27d is blocked and branched to the left and right, and the discharge ports 15a and 15b are arranged along the right part 28d and the left part 28c, the cold air passing through the narrowed part 27c spreads to the left and right. Can be easily guided to.

  In addition, since the lighting device 20 for illuminating the inside of the refrigerator compartment 6 is provided between the left part 28c and the right part 28d above the central part 28f, the space above the central part 28f disposed below is effectively used. The entire refrigerator compartment 6 can be illuminated from the upper center of the refrigerator compartment 6.

  Further, since the member 18 made of a good thermal conductor covering the back of the refrigerator compartment 6 is provided below the discharge ports 15a and 15b, the cold heat of the cold air flowing from the discharge ports 15a and 15b is transmitted to the member 18. Thereby, cold heat is discharged | emitted from the whole member 18, and the temperature of the refrigerator compartment 6 can be made uniform. Further, since the dew condensation is performed by the member 18 when the outside air flows in and the moisture is retained, the cluster ions combined with the water molecules can be enlarged and conveyed to every corner of the refrigerator compartment 6.

  In this embodiment, when cooling the center part of the left-right direction of the refrigerator compartment 6 more, it is good to omit the illumination room 20a and to provide a discharge port in that part. At this time, the illuminating device 20 can provide interior lighting by being provided on the ceiling of the refrigerator compartment 6 or the like.

  Further, the first and second pressure chambers 27 b and 27 d of the cold air passage 27 provided on the back surface of the refrigerator compartment 6 may be formed to extend to the side wall of the refrigerator compartment 6. Thereby, the flow passage areas of the first and second pressure chambers 27b and 27d are further expanded, the cool air is decelerated, and the refrigerator compartment 6 can be cooled more uniformly. Further, the cold air passage 27 may be provided on the side wall of the refrigerator compartment 6.

  INDUSTRIAL APPLICABILITY The present invention can be used for a refrigerator that discharges cold air from a discharge port formed in a cold air passage to a storage chamber.

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
27 cold air passage 27a guide portion 27b first pressure chamber 27c constriction portion 27d second pressure chamber 28 duct 28a ion generation chamber 28b opening portion 28c upper wall 28f central portion 29 right passage 30 middle passage 31 left passage 35 temperature sensor 35a hole portion 35b Locking portion 55 Back plate 56 Back duct 57 Cooler 58 Blower 59 Compressor 63 Back discharge port 65 Damper 71 First cold air duct 72 Cold air return port 73 Second cold air duct 74 Side discharge port 75 Bottom duct 86 Ion generator 86a Housing 86b Through-hole 86d Ion generation surface 86e Dielectric electrode 86g Vent hole 86h Filter 86j, 86k Ion generation part 86p, 86q Discharge electrode

Claims (7)

A storage chamber for storing stored items, a cooler for generating cold air, a blower for sending the cold air generated by the cooler to the storage chamber, and the cold air generated by the cooler circulates by driving the blower In a refrigerator comprising a cold air passage and a discharge port that discharges cold air that opens into the storage chamber and flows through the cold air passage to the storage chamber,
The cold air passage has a plurality of passages and a first pressure chamber whose flow area is widened downstream of the cooler, and cold air that is disposed in a downstream portion of the first pressure chamber and flows through the plurality of passages. A merging portion where the merging portion, a stenosis portion communicating with the downstream of the merging portion and narrowing the channel area, and a second pressure chamber communicating with the downstream of the stenosis portion and expanding the channel area,
The inner wall of the downstream part of the second pressure chamber is provided with a central part facing the narrowed part,
The refrigerator, wherein the discharge port is provided in a second pressure chamber other than a region between the narrowed portion and the central portion . The refrigerator according to claim 1 wherein the discharge port is characterized that you are provided on both sides in the direction of widening the second pressure chamber with respect to the region.   The cold air passage is provided on the back surface of the storage chamber, the flow path area is narrowed along the back surface of the storage chamber, and the first and second pressure chambers are flow paths along the back surface of the storage chamber. The refrigerator according to claim 1 or 2, wherein the area is widened.   The refrigerator according to claim 3, wherein a second pressure chamber is disposed above the first pressure chamber, and the discharge port is provided across the left and right upper portions of the back surface of the storage chamber. Left portion disposed on the left and right above the central portion and the central portion in the upper wall of the second pressure chamber and to form a right portion, the branch air flow flowing into the second pressure chamber to the left and right intercepts by the central unit The refrigerator according to claim 4, wherein the discharge port is disposed along the left part and the right part. 6. The refrigerator according to claim 5, wherein the plurality of passages include a right passage, a central passage, and a left passage arranged in parallel in a left-right direction, and the narrowed portion is disposed to face the central passage. . 7. A member comprising a good thermal conductor that discharges cold heat of cold air flowing through the first pressure chamber to the storage chamber is provided between the first pressure chamber and the storage chamber . The refrigerator in any one.

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