JP2010249396A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator having high cooling efficiency and suppressing deterioration of stored objects. <P>SOLUTION: This refrigerator 1 has: a storage compartment 6 receiving the stored objects; a cooler 57 producing cold air; a cold air passage 27 formed in a rear face of the storage compartment 6 for circulating the cold air produced by the cooler 57; discharge openings 15a, 15b formed in an upper section of the storage compartment 6 and discharging the cold air circulated in the cold air passage 27 to the storage compartment 6; and an ion generator 86 having discharge electrodes 86p, 86q and releasing ion into the cold air passage 27. The cold air passage 27 has: a first pressure chamber 27b expanding an area of a flow channel in the horizontal direction along the rear face of the storage compartment 6 on a downstream side of the cooler 57; a narrowed section 27c communicated with a downstream side of the first pressure chamber 27b and narrowing the area of the flow channel; and a second pressure chamber 27d communicated with a downstream side of the narrowed section 27c and expanding the area of the flow channel, and the discharge openings 15a, 15b and the ion generator 86 are disposed in the second pressure chamber 27d. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a refrigerator provided with an ion generator that generates ions.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator has a cooler at the bottom and a refrigerator compartment at the top. A blower is provided in the vicinity of the cooler. A cold air passage through which the cold air is guided from the cooler by driving the blower is disposed on the back of the refrigerator compartment. The cold air passage is bent along the periphery of the refrigerator compartment and is provided at the left end portion, the upper end portion and the right end portion of the refrigerator compartment, and a plurality of discharge ports are opened. A return opening is provided in the lower part of the refrigerator compartment, and a return passage extending downward from the return opening to return the cool air to the cooler is provided.

  When the blower is driven, the cold air generated by the cooler is guided upward from the lower part of the refrigerator and flows through the cold air passage. The cold air flowing through the cold air passage is discharged from a discharge port arranged in the peripheral part of the refrigerator compartment. The cold air discharged from the discharge port flows through the refrigerator compartment, flows into the return passage from the return port, and returns to the cooler. Thereby, the refrigerator compartment is cooled.

  An electrode of the ion generator is supported by a support member in the upper end portion of the cold air passage, and is disposed so as to protrude into the passage. The main body of the ion generator is disposed below the cold air passage, and negative ions are generated from the electrodes by driving the main body. The cold air flowing through the cold air passage contains negative ions and is discharged from the discharge port at the left end portion on the downstream side of the ion generator. Thereby, a negative ion can distribute | circulate in a refrigerator compartment and food odor can be reduced.

Japanese Unexamined Patent Publication No. 2003-14365 (pages 4-7, FIG. 2)

  However, according to the conventional refrigerator, since the discharge outlet for discharging ions is arranged to the left of the refrigerator compartment, there is a problem that the distribution of ions supplied into the refrigerator compartment becomes uneven. Further, the cool air flowing in the vicinity of the electrode contains a large amount of ions, and the ions contained in the cold air flowing away from the electrode are reduced. For this reason, ions are dispersed and included in the cold air discharged from the discharge port, and the distribution of ions in the refrigerator compartment is further non-uniform. Furthermore, since the discharge outlet for discharging the cold air is arranged to the right of the refrigerator compartment, the distribution of the cold air supplied into the refrigerator compartment becomes non-uniform. Therefore, there is a problem that it is difficult to cool the refrigerator compartment uniformly.

  An object of the present invention is to provide a refrigerator in which cold air and ions are uniformly supplied into a storage chamber and the cooling efficiency is high and the deterioration of stored items is small.

  In order to achieve the above object, the present invention includes a storage chamber for storing a stored item, a cooler for generating cold air, and a cold air passage provided on the back of the storage chamber through which the cold air generated by the cooler flows. The refrigerator includes a discharge port for discharging the cold air flowing through the cold air passage to the storage chamber, and an ion generator having a discharge electrode to discharge ions into the cold air passage. A first pressure chamber whose flow path area is expanded in the left-right direction downstream of the vessel, a narrowed portion communicating with the downstream of the first pressure chamber and narrowing the flow passage area, and communicating with the downstream of the narrowed portion. A second pressure chamber having a wide passage area, and the discharge port and the ion generator are arranged in the second pressure chamber.

  According to this configuration, the cold air generated by the cooler flows into the first pressure chamber of the cold air passage. 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 cool air whose flow velocity has decreased in the second pressure chamber contains ions released from the ion generator and is discharged from the discharge port to the storage chamber.

  Moreover, the present invention is characterized in that, in the refrigerator configured as described above, the ion generator is disposed in the vicinity of the narrowed portion. According to this configuration, the flow rate of the cold air passing through the constricted portion with the narrowed flow path is increased, and ions are included in the accelerated cold air immediately after flowing out of the constricted portion. Thereafter, the flow velocity of the cold air containing ions decreases due to the expansion of the flow path of the second pressure chamber and is discharged from the discharge port.

  According to the present invention, in the refrigerator configured as described above, the ion generation device is disposed in an ion generation chamber provided in front of the second pressure chamber, and a back surface of the ion generation chamber has an opening facing the discharge electrode. The cold air passage includes a guide portion that is formed of an inclined surface that is inclined forward and the discharge port is disposed forward and upward from the inclined surface and guides cold air toward the ion generation chamber and narrows the flow path. Provided on a wall surface facing the ion generation chamber.

  According to this configuration, the cool air flowing through the cool air passage is speeded up by the guide portion provided on the wall surface facing the ion generation chamber, the speed of the cold air is increased, and is guided in the direction of the ion generation chamber. And an ion is contained through the opening part provided in the inclined surface of the back surface of an ion generation chamber, and is guide | induced to the discharge port of the upper front by the inclined surface.

  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.

  According to the present invention, in the refrigerator configured as described above, the ion generator includes a first ion generator that emits negative ions and a second ion generator that generates positive ions. According to this configuration, positive ions and negative ions are released into the storage room, and the room is sterilized and the odor is removed. Further, 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.

  Moreover, the present invention is characterized in that in the refrigerator having the above-described configuration, cold air guide portions projecting downward are provided at both left and right ends of the central wall. According to this configuration, the cold air that has collided with the central wall branches to the left and right, is guided downward by the cold air guide, and then rises and is discharged from the left and right discharge ports.

  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 expanded downstream of the cooler and the second pressure chamber connected to the first pressure chamber via the constriction, and the discharge port and the ion Since the generator is provided in 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. For this reason, static pressure is uniformly applied to the discharge ports, and cold air containing ions uniformly is discharged from the entire discharge port into the storage chamber. Therefore, cold air and ions can be supplied uniformly into the storage chamber, and a refrigerator with good cooling efficiency and little deterioration of stored items can be obtained.

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. The rear view which shows the panel assembly of the other structure 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 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, 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.

  If the constricted portion 27c can sufficiently increase the cool air, the inclined surface 28k and the guide portion 27a may be formed substantially parallel to each other by omitting the restriction of the cool air passage 27 by the guide portion 27a. Thereby, excessive acceleration of the flow velocity can be suppressed, generation of vortex can be suppressed, and noise can be reduced.

  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 are combined 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 freezing rooms 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 to 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 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.

  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. And the discharge ports 15a and 15b and the ion generator 86 are provided in the second pressure chamber 27d, so that the cold air flowing through the cold air passage 27 becomes a static pressure in the first pressure chamber 27b and the second pressure chamber 27d. Converted and decelerated. For this reason, static pressure is equally applied to the discharge ports 15a and 15b, and cold air containing ions uniformly is discharged into the refrigerator compartment 6 from the entire discharge ports 15a and 15b. Therefore, cold air and ions can be supplied uniformly into the refrigerator compartment 6, and the refrigerator 1 with good cooling efficiency and little deterioration of stored items can be obtained.

  At this time, if the discharge ports 15a and 15b are formed to extend in the left-right direction to expand the second pressure chamber 27d, cold air can be uniformly discharged from the wide range to the refrigerating chamber 6, and the inside of the refrigerating chamber 6 can be cooled more uniformly. In addition, the ions can be supplied to the refrigerator compartment 6 more uniformly.

  In addition, since the ion generator 86 is disposed in the vicinity of the constricted portion 27c, ions are included in the cold air accelerated by the constricted portion 27c. For this reason, the ions generated by the ion generator 86 can be sufficiently contained in the cold air without being saturated and diffused to the discharge ports 15a and 15b. Therefore, the amount of ions contained in the cold air can be increased.

  In addition, the rear surface of the ion generation chamber 28a has an opening 28b facing the discharge electrode, and the upper portion includes an inclined surface 28k that is inclined forward, and the discharge ports 15a and 15b are disposed forward and upward from the inclined surface 28k. The cold air flowing along the ion generation chamber 28a can be easily guided to the front upper discharge ports 15a and 15b. Further, since the guide portion 27a that guides the cold air in the direction of the ion generation chamber 28a and narrows the flow path is provided on the wall surface of the cold air passage 27 facing the ion generation chamber 28a, the cold air is accelerated in the ion generation chamber 28a. Guided. Therefore, the amount of ions contained in the cold air can be further increased.

  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 disposed along the right part 28d and the left part 28c, the cold air passing through the constricted part 27c spreads to the left and right. Can be easily guided to.

  The ion generator 86 includes an ion generator 86k (first ion generator) that emits negative ions and an ion generator 86j (second ion generator) that generates positive ions. The generation amount of ions increases rather than alternately generating positive and negative ions, and the influence of the decrease due to collision can be reduced.

  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 the present embodiment, when the area of the first pressure chamber 27 b facing the member 18 is widened, the amount of cold heat transmitted to the member 18 increases. Thereby, the indirect cooling capability of the refrigerator compartment 6 can be improved and the refrigerator compartment 6 can be cooled more uniformly. At this time, since the distance between the narrowed portion 27c and the central portion 28f is shortened, the cold air that is accelerated from the narrowed portion 27c and flows into the second pressure chamber 27c immediately flows out from the discharge ports 15a and 15b.

  In order to prevent this, as shown in FIG. 21, it is preferable to provide cold air guide portions 28j protruding downward at the left and right ends of the central portion 28f. Accordingly, the cold air that collides with the central portion 28f from the narrowed portion 27c branches to the left and right and is guided downward by the cold air guide portion 28j. Thereafter, the cold air rises and is discharged from the left and right discharge ports 15a and 15b. Accordingly, it is possible to uniformly discharge the cold air whose flow rate is reduced from the discharge ports 15a and 15b.

  In addition, since cold air concentrates and distribute | circulates to the constriction part 27c, when the member 18 covers the front surface of the constriction part 27c, it becomes easy to generate | occur | produce condensation on the surface of the member 18. FIG. In this case, the condensation of the member 18 can be reduced by making the duct 28 made of a heat insulating material thicker than the first pressure chamber 27b in the vicinity of 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.

  Moreover, you may form the 1st, 2nd pressure chambers 27b and 27d of the cold air | gas channel | path 27 provided in the back surface of the refrigerator compartment 6 extending to a side wall. 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 APPLICATION This invention can be utilized for the refrigerator provided with the ion generator which generate | occur | produces ion.

DESCRIPTION OF SYMBOLS 1 Refrigerator 1a Heat insulation box 6 Refrigeration 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 device 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 27j cold air guide portion 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 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 generating surface 86e Dielectric electrode 86g Vent hole 86h Filter 86j, 86k Ion generating part 86p, 86q Discharge electrode

Claims (7)

  A storage chamber for storing stored items, a cooler for generating cold air, a cool air passage through which the cool air generated by the cooler is provided and disposed at the back of the storage chamber, and the cold air flowing through the cool air passage is stored in the storage chamber In a refrigerator including a discharge port for discharging into a chamber and an ion generator having a discharge electrode and discharging ions into the cold air passage, the cold air passage has a flow area in the left-right direction downstream of the cooler. An expanded first pressure chamber, a narrowed portion that is communicated downstream of the first pressure chamber and narrows the flow passage area, and a second pressure chamber that communicates downstream of the narrowed portion and widens the flow passage area. And a refrigerator, wherein the discharge port and the ion generator are arranged in a second pressure chamber.   The refrigerator according to claim 1, wherein the ion generator is disposed in the vicinity of the narrowed portion.   The ion generation device is disposed in an ion generation chamber provided in front of a second pressure chamber, and the back surface of the ion generation chamber has an opening facing the discharge electrode and an upper surface is inclined forward. The discharge port is disposed on the front upper side of the inclined surface, and a guide portion that guides cold air toward the ion generation chamber and narrows the flow path is provided on the wall surface of the cold air passage facing the ion generation chamber. The refrigerator according to claim 2.   The upper wall of the second pressure chamber has a central portion disposed below the left and right portions, and the narrow portion is disposed opposite the central portion to block airflow flowing into the second pressure chamber. The refrigerator according to any one of claims 1 to 3, wherein the refrigerator is branched left and right, and the discharge port is disposed along the left part and the right part.   5. The refrigerator according to claim 4, wherein the ion generation device includes a first ion generation unit that emits negative ions and a second ion generation unit that generates positive ions.   The refrigerator according to claim 4 or 5, wherein cold air guide portions projecting downward are provided at both left and right ends of the central wall.   The refrigerator according to any one of claims 1 to 6, wherein a member made of a thermal conductor that covers a back surface of the storage chamber is provided below the discharge port.

Images