JP5490614B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a mounting shelf in a storage chamber.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator is provided with a humidifier in the storage chamber. The humidifier includes a water storage tank and an ultrasonic vibrator, and generates mist by driving the ultrasonic vibrator. The humidity of the storage room is monitored by a humidity sensor, and the humidifier is driven when the humidity of the storage room decreases. Thereby, drying of a store thing is suppressed and a store thing can be preserved for a long term.

Japanese Patent Laying-Open No. 2005-337694 (pages 5 to 11 and FIG. 2)

  However, according to the conventional refrigerator, since the humidifier is provided, there is a problem that the cost and power consumption of the refrigerator increase and the volumetric efficiency decreases. Further, white stains are generated by scale components such as metal oxides contained in the mist adhering to the wall surface of the storage chamber. For this reason, it is necessary to frequently clean the storage room, and there is a problem that convenience of the refrigerator deteriorates.

  Further, when storing stored items that do not require humidification or when the user does not like the adhesion of mist to the wall surface or the like, the humidifier may be stopped to switch the storage chamber to a dry state. At this time, there is a problem that the space of the humidifier is wasted.

  An object of the present invention is to provide a refrigerator capable of suppressing the drying of stored items with a simple configuration and switching the storage room to a dry state, reducing cost and power consumption, and improving convenience and volumetric efficiency. And

  In order to achieve the above object, the present invention includes a storage chamber whose front surface is opened and closed by a door, a storage shelf on which storage items are mounted and a plurality of compartments are formed by partitioning the storage chamber in the vertical direction, At least one discharge port that discharges cold air in the left-right direction along the back surface of the storage chamber, a first return port that opens into at least a section above the discharge port, and from which the cool air flows out of the storage chamber; And a second return port through which cool air in the storage chamber flows out, and an opening / closing unit for opening and closing the first return port.

  According to this configuration, the door is opened, the stored item is placed on the placement shelf, and the door is closed. The outside air that has flowed into the storage chamber is cooled in the storage chamber, and condensation occurs on the wall surface of the storage chamber and the surface of the mounting shelf. The cold air discharged from the discharge port circulates in the left-right direction along the back surface of the storage chamber, and circulates forward along the side surface. At this time, when the first return port is closed by the opening / closing part, the cold air circulates forward along the upper surface of the mounting shelf that forms the bottom surface in the compartment. The cold air flowing along the upper surface of the mounting shelf descends in front of the mounting shelf, is guided to the second return port facing the lower compartment, and flows out of the storage chamber. When the first return port is opened by the opening / closing part, a part of the cool air circulates forward along the lower surface of the mounting shelf that forms the ceiling surface in the compartment. The cold air flowing along the lower surface of the mounting shelf rises in front of the mounting shelf, is guided to the first return port facing the upper section, and flows out of the storage chamber.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the storage shelf is made of glass. According to this configuration, since the heat capacity of the mounting shelf is large, dew condensation is likely to occur on the surface of the mounting shelf.

  In the refrigerator having the above-described configuration, the refrigerator includes a storage case that is disposed at a lower portion of the storage chamber and that is opened and removed from the front with an upper surface opened, and cool air is provided between the storage shelf and the storage case. And a second return port is provided at the rear of the storage case. According to this configuration, the cold air that has flowed through the upper portion of the storage chamber flows through the upper part of the storage case, and is guided to the second return port disposed rearward. Thereby, the inside of a storage case is maintained at high humidity.

  According to the present invention, the first and second return ports respectively face the compartment above and below the discharge port, and the first return port is provided with an opening / closing part. Then, cool air is discharged from the discharge port in the left-right direction along the back surface of the storage chamber. When the opening / closing part is closed, the cool air discharged from the discharge port flows along the back and side surfaces of the storage chamber and is guided forward through the upper surface of the mounting shelf. For this reason, the dew condensation on the lower surface of the mounting shelf is maintained, and drying of the storage chamber can be suppressed to maintain a high humidity state for a long time. Further, when the opening / closing part is opened, a part of the cool air discharged from the discharge port circulates along the lower surface of the mounting shelf, the condensation on the mounting shelf evaporates, and the storage chamber becomes dry.

  Thereby, it is possible to prevent the stored product from being dried with a simple configuration and to switch the storage chamber to a dry state. Therefore, it is not necessary to provide a humidifying device as in the conventional example, and the cost and power consumption of the refrigerator can be reduced to improve convenience and volumetric efficiency.

Side surface sectional drawing which shows the refrigerator of embodiment of this invention Front sectional drawing which shows the refrigerator of embodiment of this invention AA sectional view of FIG. Side surface sectional drawing which shows the detail of the protrusion part of the refrigerator of embodiment of this invention Side surface sectional drawing which shows the cross section which passes along the discharge passage of the refrigerator of embodiment of this invention BB sectional view of FIG. The figure which shows transition of the relative humidity in a refrigerator compartment when the louver of the refrigerator of embodiment of this invention is closed. The figure which shows transition of the relative humidity in a refrigerator compartment when the louver of the refrigerator of embodiment of this invention is opened.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a side sectional view and a front sectional view showing a refrigerator according to one embodiment. In the refrigerator 1, the freezer compartment 2 is provided above the heat insulating box 35, and the refrigerator compartment 3 is provided below the freezer compartment 2. The freezer compartment 2 and the refrigerator compartment 3 are partitioned by a partition wall 4 filled with a heat insulating material. The front surface of the freezer compartment 2 is opened and closed by a door 2a, and the front surface of the refrigerator compartment 3 is opened and closed by a door 3a.

  A freezer compartment duct 10 is provided on the back of the freezer compartment 2. A discharge port 10a is provided in the upper part on the front side of the freezer compartment duct 10, and a return port 10b is provided in the lower part. A cooler 5 that generates cool air is disposed in the freezer compartment duct 10, and a blower fan 6 is disposed above the cooler 5. Below the cooler 5, a drain pan 11 that collects defrosted water from the cooler 5 is provided. Further, the freezer compartment duct 10 has a communication passage 7 that branches off on the exhaust side of the blower fan 6 and is arranged on the right side of the cooler 5.

  A low-temperature case 18 capable of low-temperature storage such as a chilled temperature zone is disposed at the upper part of the refrigerator compartment 3. The back surface of the low-temperature case 18 is opened, and cold air flows from a discharge port 20c described later. Below the low-temperature case 18, a plurality of mounting shelves 13 and 14 are provided which are made of glass and on which stored items are placed. The mounting shelf 13 is bridged by a plurality of rails 13a projecting from both side walls of the refrigerator compartment 3, so that the position in the height direction can be changed as appropriate according to the stored item.

  The lowermost mounting shelf 14 is fixed to the heat insulating box 35, and a vegetable room 16 including an isolation chamber is formed below the mounting shelf 14. The upper and lower sides of the mounting shelf 14 communicate with each other through a communication portion 14 a provided in front of the mounting shelf 14. The refrigerator compartment 3 and the vegetable compartment 16 communicated by the communication portion 14 a are partitioned in the vertical direction by the mounting shelves 13 and 14, and a plurality of compartments including the vegetable compartment 16 are formed.

  A storage case 15 having an open upper surface is disposed in the vegetable compartment 16 so as to be freely put in and out. Above the storage case 15, a gap 15 a is provided between the mounting shelf 14 and cold air. Further, an opening 14 b is provided at the rear end of the mounting shelf 14.

  A discharge passage 20 and a return passage 23 extending in the vertical direction are arranged in parallel on the rear surface of the refrigerator compartment 3. The discharge passage 20 has a left passage 21 and a right passage 22 disposed on the left and right sides of the return passage 23, respectively. A plurality of discharge ports 20b are provided on the left side surface of the left passage 21 and the right side surface of the right passage 22 respectively. Cold air is discharged in the left-right direction along the back surface of the refrigerator compartment 3 from the discharge port 20b.

  A lamp 30 is disposed in front of the upper portion of the return passage 23. The front surface of the lamp 30 is covered with a transparent lamp cover 31. Since the mounting shelf 13 is made of glass, the light emitted from the lamps 30 passes through each mounting shelf 13. Thereby, it can illuminate to the lower part of the refrigerator compartment 3. The lamp 30 is disposed above a metal plate 27 described later. For this reason, the emitted light of the lamp 30 is reflected by the metal plate 27, and the inside of the refrigerator compartment 3 can be brightened.

  FIG. 3 shows a cross-sectional view taken along the line AA of FIG. The discharge passage 20 and the return passage 23 are formed by attaching a duct 26 formed of a heat insulating material of a foamed resin molded product having a plurality of passages to the back wall of the refrigerator compartment 3. The discharge passage 20 and the return passage 23 are isolated by ribs 26 d and 26 e formed in the duct 26. Thereby, the discharge passage 20 and the return passage 23 are integrally formed, and the number of parts can be reduced.

  The front side of the duct 26 is covered with a panel 33 of a resin molded product. The duct 26 and the panel 33 are integrally formed by engaging a concave portion and a convex portion provided respectively, and are detachably attached to the back surface of the refrigerator compartment 3. The front side of the panel 33 is covered with a plate-shaped metal plate 27 made of aluminum, stainless steel or the like. A discharge port 20 b of the discharge passage 20 is formed by openings provided on the side surfaces of the duct 26, the panel 33, and the metal plate 27.

  The cold heat of the cold air flowing through the discharge passage 20 and the return passage 23 is transmitted to the metal plate 27 through the panel 33 and the duct 26. The cold heat transmitted to the metal plate 27 is released into the refrigerator compartment 3. At this time, the temperature of the cold air flowing through the discharge passage 20 (about −12 to −8 ° C.) is lower than the temperature of the cold air flowing through the return passage 23 (about −2 to 1 ° C.). However, since the discharge passage 20 and the return passage 23 are arranged side by side, the surface of the metal plate 27 becomes a uniform temperature by heat conduction. Thereby, the temperature distribution of the refrigerator compartment 3 can be made uniform by the cold heat released from the metal plate 27.

  At the lower end of the panel 33, a protruding portion 33a protruding forward is provided. FIG. 4 is a side sectional view showing details of the protruding portion 33a. A convex portion 33b that protrudes downward is provided at the lower front portion of the protruding portion 33a. The rear end of the protruding portion 33 a is locked to the step portion 35 b formed in the inner box 35 a of the heat insulating box 35, and the convex portion 33 b comes into contact with the upper surface of the mounting shelf 14. Thereby, the protrusion part 33a is supported stably.

  Further, a return port 23b (second return port) through which cool air in the vegetable compartment 16 flows into the return passage 23 is formed on the lower surface of the rear portion of the protruding portion 33a. The return port 23 b is arranged on the upper side of the mounting shelf 14 (see FIG. 1) and is formed facing the opening 14 b formed at the rear end of the mounting shelf 14. As a result, the return port 23 b faces the vegetable compartment 16 and is provided behind the storage case 15.

  The protrusion 33 a extends forward from the metal plate 27 and is formed below the metal plate 27. The lower end of the metal plate 27 is supported by a support portion 33c extending forward from the panel 33 above the protruding portion 33a. A notch 33d is formed on the upper surface of the protrusion 33a, and a receiving member 34 is attached to the notch 33d.

  The receiving member 34 is made of a resin molded product and has an upper surface opened. Since the protruding portion 33a is disposed below the metal plate 27, the dew condensation generated on the metal plate 27 flows down to the receiving member 34 and is stored. The condensed water stored in the receiving member 34 evaporates and can suppress drying in the refrigerator compartment 3. By adhering or welding the receiving member 34 and the notch 33d with a sealant or the like, it is possible to prevent the intrusion of condensed water into the protrusion 33a.

  In addition, the unevenness extended in the horizontal direction may be provided in the front surface of the metal plate 27, and the dew condensation generated on the metal plate 27 may be held by the unevenness. Thereby, the dew condensation water hold | maintained at the unevenness | corrugation of the metal plate 27 evaporates, and the drying in the refrigerator compartment 3 can further be suppressed.

  FIG. 5 is a side sectional view showing a section through the discharge passage 20. FIG. 6 is a cross-sectional view taken along the line BB in FIG. The discharge passage 20 communicates with the communication passage 7 via the damper 17. The discharge passage 20 has a branch portion 20 a disposed below the damper 17 on the front side of the return passage 23. The discharge passage 20 branches into a left and right left passage 21 and a right passage 22 (see FIG. 2) at a branching portion 20a.

  In FIG. 2, the return passage 23 has first and second branch passages 24, 25 that branch left and right at the top. The first and second branch paths 24 and 25 are disposed on the back side of the freezer compartment duct 10. The freezer compartment duct 10 and the first and second branch passages 24 and 25 communicate with each other through communication ports 24a and 25a (see FIG. 2) opened to the back side of the freezer compartment duct 10 below the cooler 5.

  In addition, a return port 40 (first return port) through which cold air flows out is provided in the upper part of the back surface of the refrigerator compartment 3. The return port 40 is disposed above the uppermost loading shelf 13 (see FIG. 1) and faces the uppermost section of the refrigerator compartment 3. The return port 40 is provided with a louver 41 (opening / closing part). The louver 41 opens and closes the return port 40 by operating the operation unit 42.

  A receiving portion 12 a of the drain pipe 12 is disposed below the drain port 11 a of the drain pan 11. The receiving portion 12 a is disposed in front of the first and second branch paths 24 and 25. The drain pipe 12 extends rearward from the receiving portion 12a through the first and second branch paths 24 and 25, and is disposed behind the return passage 23 and extends downward. The defrost water collected in the drain pan 11 is drained to an evaporating dish (not shown) through the drain pipe 12. Therefore, the return passage 23 branches into the first and second branch passages 24 and 25 and the flow passage area is not reduced, and interference between the return passage 23 and the drainage pipe 12 can be easily prevented.

  In the refrigerator 1 having the above-described configuration, air flowing through the freezer compartment duct 10 is driven by the blower fan 6 to exchange heat with the cooler 5 to generate cold air. The cool air generated by the cooler 5 is discharged into the freezer compartment 2 from the discharge port 10a as indicated by an arrow E1 (see FIG. 1). The cold air discharged into the freezer compartment 2 flows through the freezer compartment 2 to cool the stored items, and returns to the cooler 5 through the return port 10b.

  Further, the cold air is branched on the exhaust side of the blower fan 6 as shown by an arrow E <b> 2 (see FIGS. 2 and 5) and flows through the communication path 7. The cold air flowing through the communication passage 7 flows into the discharge passage 20 via the damper 17 and branches at the branch portion 20a. A part of the cold air flowing into the discharge passage 20 is discharged into the low temperature case 18 from the branch portion 20a through the discharge port 20c as shown by an arrow E3 (see FIG. 1). The low temperature case 18 is maintained at a low temperature because the cold air passing through the damper 17 is immediately supplied. The cold air flowing through the low temperature case 18 mainly flows out from the front side of the low temperature case 18.

  The cold air branched at the branch portion 20a flows down the left passage 21 and the right passage 22 of the discharge passage 20 as shown by arrows E4 and E5 (see FIG. 2). The cold air flowing down the discharge passage 20 is discharged from the discharge port 20b into the refrigerating chamber 3 as shown by an arrow E6 (see FIGS. 2 and 3). At this time, since the discharge port 20 b is provided on the side surfaces of the left passage 21 and the right passage 22, cold air is discharged in the left-right direction along the back surface of the refrigerator compartment 3. Further, the cold heat of the cold air flowing down the discharge passage 20 is transmitted to the metal plate 27 through the duct 26 and the panel 33.

  The cold air discharged into the refrigerator compartment 3 circulates along the back surface of the refrigerator compartment 3, and then circulates forward along both side surfaces as indicated by arrows E7 (see FIGS. 1 and 5). Thereby, each division of the refrigerator compartment 3 is indirectly cooled from both sides. Further, since a plurality of discharge ports 20b are provided in the vertical direction, the stored items in each section partitioned by the plurality of mounting shelves 13 can be easily cooled.

  At this time, in a state where the return port 40 is closed by the louver 41, the cool air is guided to the lower return port 23b, so that the cool air flows along the upper surface of the mounting shelf 13 that forms the bottom surface in the compartment. In addition, the stored item in the section where the discharge port 20b is not provided is indirectly cooled via the upper and lower placement shelves 13.

  The cold air flowing along the mounting shelf 13 descends in front of the mounting shelf 13 as indicated by an arrow E8 (see FIGS. 1 and 5). The cold air descending the front part of the refrigerator compartment 3 flows into the vegetable compartment 16 through the communication portion 14a in front of the mounting shelf 14. The cold air that has flowed into the vegetable compartment 16 flows through the gap 15a above the storage case 15 as shown by an arrow E9 (see FIG. 1). Thereby, stored things, such as vegetables in the storage case 15, are cooled. Since the cold air flowing through the gap 15a is wet cold air after the stored items in the refrigerator compartment 3 are cooled, drying of the vegetables in the storage case 15 can be suppressed.

  The cold air flowing backward through the gap 15a flows into the return passage 23 from the return port 23b through the opening 14a as shown by an arrow E10 (see FIG. 1). The cold air that has flowed into the return passage 23 rises as shown by an arrow E11 (see FIGS. 1 and 2). The cold air rising up the return passage 23 is transmitted to the metal plate 27 via the duct 26 and the panel 33. The cold air flowing through the discharge passage 20 and the return passage 23 and the cold heat transferred to the metal plate 27 from the cold air discharged from the discharge port 20 b are released into the refrigerator compartment 3 from the entire metal plate 27. Thereby, the temperature distribution in the refrigerator compartment 3 is equalized.

  The cool air rising in the return passage 23 branches to the first and second branch paths 24 and 25 as indicated by arrows E12 and E13 (see FIG. 2). The cold air flowing through the first and second branch passages 24 and 25 flows into the freezer compartment duct 10 through the communication ports 24a and 25a and returns to the cooler 5.

  Further, when the louver 41 is opened and the return port 40 is opened, a part of the cool air discharged from the discharge ports 20 b and 20 c to the refrigerator compartment 3 flows out from the return port 40. The cold air flowing out from the return port 40 returns to the cooler 5 through the first branch path 24. At this time, since a part of the cool air discharged from the discharge port 20b and flowing forward as shown by an arrow E7 is guided to the upper return port 40, it is formed on the lower surface of the mounting shelf 13 forming the ceiling surface in the compartment. Circulate along.

  Further, when the door 3 a of the refrigerator compartment 3 is opened, outside air flows into the refrigerator compartment 3 and the vegetable compartment 16. Moisture contained in the outside air is condensed on the walls of the refrigerator compartment 3 and the vegetable compartment 16 and the surfaces of the mounting shelves 13 and 14. At this time, since cool air is discharged in the left-right direction along the back surface of the refrigerator compartment 3 from the discharge port 20b, the cool air contacting the mounting shelf 13 can be reduced. Further, in a state where the return port 40 is closed by the louver 41, cold air flows along the upper surface of the mounting shelf 13.

  For this reason, evaporation of dew condensation generated on the lower surface of the mounting shelf 13 is suppressed. Thereby, the dew condensation on the lower surface of the mounting shelf 13 is held for a long time and gradually evaporates, and drying of stored items in the refrigerator compartment 3 and the vegetable compartment 16 can be suppressed.

  Further, when the return port 40 is opened by the louver 41, some cool air flows along the lower surface of the mounting shelf 13. For this reason, evaporation of dew condensation generated on the lower surface of the mounting shelf 13 is promoted. Thereby, when storing the storage thing which does not need humidification, or when a user does not like the adhesion of dew condensation to the mounting shelf 13 or a wall surface, the return port 40 is closed and the refrigerator compartment 3 is switched to a dry state. it can. At this time, even if the refrigerator compartment 3 is in a dry state, the cold air after passing through the refrigerator compartment 3 circulates through the gap 15a, so that drying of vegetables and the like in the storage case 15 is suppressed.

  FIG. 7 is a diagram showing the transition of the relative humidity of the refrigerator compartment 3 with the return port 40 closed by the louver 41. FIG. 8 is a diagram showing the transition of the relative humidity in the refrigerator compartment 3 with the return port 40 opened by the louver 41. The vertical axis represents relative humidity (unit:%), and the horizontal axis represents elapsed time (unit: hour: minute). In addition, the door 3a of the refrigerator compartment 3 is closed at time 0:00 from the opened state.

  According to these figures, when the return port 40 is closed, the time T1 until the relative humidity reaches 40% is 10 hours and 39 minutes. In contrast, when the return port 40 was opened, the time T2 until the relative humidity reached 40% was 7 hours and 10 minutes. Therefore, it is possible to suppress drying of the stored items in the refrigerator compartment 3 by closing the return port 40. When the relative humidity becomes 40% or less, the surface of the mounting shelf 13 disappears until the dew condensation is not visible.

  According to this embodiment, the return port 40 (first return port) is arranged facing the section above the discharge port 20b, and is opened and closed by the louver 41 (opening / closing part). The return port 23b (second return port) is arranged facing the vegetable compartment 16 which is a section below the discharge port 20b. And cold air is discharged in the left-right direction along the back surface of the refrigerator compartment 3 from the discharge outlet 20b. When the louver 41 is closed, the cold air discharged from the discharge port 20b flows along the back surface and the side surface of the refrigerator compartment 3, and is guided forward through the upper surface of the mounting shelf 13. For this reason, the dew condensation of the lower surface of the mounting shelf 13 is maintained, and drying of the refrigerator compartment 3 and the vegetable compartment 16 can be suppressed and a high humidity state can be maintained for a long time.

  Further, when the louver 41 is opened, a part of the cold air discharged from the discharge port 20b flows along the lower surface of the mounting shelf 13, the condensation on the mounting shelf 13 evaporates, and the refrigerator compartment 3 becomes dry. Thereby, it is possible to suppress drying of stored items with a simple configuration and to switch the refrigerator compartment 3 to a dry state. Therefore, it is not necessary to provide a humidifier as in the conventional example, and the cost and power consumption of the refrigerator 1 can be reduced, and convenience and volumetric efficiency can be improved.

  Moreover, since the mounting shelves 13 and 14 are formed of glass having a heat capacity larger than that of the resin, moisture contained in the outside air flowing into the refrigerating chamber 3 is easily condensed when the door 3a is opened. Thereby, drying in the refrigerator compartment 3 and the vegetable compartment 16 can further be suppressed.

  Moreover, since the clearance 15a is provided between the mounting shelf 14 and the storage case 15, and the return port 23b is provided at the rear of the storage case 15, the cold air that has circulated through the refrigerator compartment 3 flows through the clearance 15a. Thereby, drying in the storage case 15 can be suppressed with the return port 40 closed and opened.

  In the present embodiment, the discharge port 20 c is provided in the section facing the return port 40, but the discharge port 20 b is arranged in a section below the return port 40. For this reason, the cold air discharged from the discharge port 20 b when the return port 40 is opened can be distributed along the lower surface of the mounting shelf 13. That is, the return port 40 may be provided so as to face at least a section above the part of the discharge ports 20b.

  In addition, although the cool air discharge port is not provided in the section (vegetable compartment 16) where the return port 23b faces, a discharge port may be provided. At this time, since the discharge port 20b is arranged in a section above the section where the return port 23b faces, the cold air discharged from the discharge port 20b when the return port 40 is closed is moved along the upper surface of the mounting shelf 13. It can be distributed. That is, the return port 23b only needs to be provided facing a lower section than at least some of the discharge ports 20b.

  Although the return port 40 is opened and closed by the louver 41, it may be opened and closed by a motor driven damper.

  According to this invention, it can utilize for the refrigerator provided with the mounting shelf in the storage chamber.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Freezing room 3 Refrigerating room 4 Partition wall 5 Cooler 6 Blower fan 7 Communication path 10 Freezing room duct 11 Drain pan 12 Drain pipe 13, 14 Loading shelf 14b Opening part 15 Storage case 16 Vegetable room 17 Damper 18 Low temperature case 20 Discharge passage 20b, 20c Discharge port 21 Left passage 22 Right passage 23 Return passage 23b, 40 Return port 24 First branch passage 25 Second branch passage 26 Duct 27 Metal plate 30 Lamp 31 Lamp cover 33 Panel 33a Projection 34 Receiving member 35 Insulated box 41 Louver 42 Operation unit

Claims (3)

  A storage room whose front is opened and closed by a door, a storage shelf for placing stored items and partitioning the storage room in the vertical direction to form a plurality of compartments, and cold air in the horizontal direction along the back of the storage room The first return port through which the cool air in the storage chamber flows out, facing at least a part above the discharge port, and at least the part below the discharge port. A refrigerator comprising: a second return port through which cool air in the storage chamber flows out; and an opening / closing part that opens and closes the first return port.   The refrigerator according to claim 1, wherein the storage shelf is made of glass.   A storage case that is disposed at a lower portion of the storage chamber and has an upper surface that is opened and removed from the front, and that forms a gap through which cool air flows between the storage shelf and the storage case; The refrigerator according to claim 1 or 2, wherein a mouth is provided behind the storage case.

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