JP2008057901A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator having superior energy saving performance and convenience in use. <P>SOLUTION: This refrigerator provided with a heat insulating space inside by packing a heat insulating material between an outer casing 11 and an inner casing 10, and provided with a refrigerating compartment 20 at an uppermost stage as the heat insulating space, comprises cold air passages 30L, 30R formed at right and left both sides of a back face of the refrigerating compartment 20 and vertically extending, shelf members 21 dividing the refrigerating compartment 20 into a plurality of storage spaces, a metallic member 25 vertically extending over the plurality of storage spaces, cold air discharge ports 30a for discharging the cold air from the cold air passages 30 to an inner side in the width direction, and upper cold air discharge ports 30b for discharging the cold air to an upper part from the cold air passages, thus a temperature in the refrigerating compartment 20 can be equalized even when an interval between both cold air passages is wide. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a refrigerator.

  Refrigerators with a refrigerator compartment at the top are widely used. Many refrigerators of this type are medium- to large-capacity class refrigerators having three or more doors. For example, Patent Document 1 discloses a refrigerator in which a refrigeration room is installed in the uppermost stage together with a vegetable room and a freezing room. The refrigerator disclosed in Patent Document 1 includes a heat conductive member that covers a cold air passage in the back portion of the refrigerator compartment, and the heat conductive member forms part of the cold air passage so as to maintain moisture and maintain temperature in the refrigerator compartment. Yes. In addition, an aluminum alloy, stainless steel or the like is used as the heat conducting member.

JP 2001-221554 A

  The front surface of the refrigerator compartment is covered with a rotary heat insulating door, and when the door is opened, the interior lamp is turned on to illuminate the refrigerator compartment. The interior lamp is disposed on the back side of the refrigerator compartment or on the ceiling. In patent document 1, since the back part of a refrigerator compartment is covered with the heat conductive member, the interior lamp is arrange | positioned at the ceiling part.

  If the refrigerator is provided with a plurality of shelves above and below in the refrigerator compartment when the interior lamp is arranged on the ceiling, if a large amount of food is placed on the upper shelf, the light of the interior lamp will be at the bottom of the refrigerator compartment. It becomes difficult to reach. In Patent Document 1, since a plurality of ceiling lamps are provided in the front and rear (see FIG. 1), it is possible to widely illuminate the refrigerator compartment.

  However, when the number of interior lamps increases, not only does the manufacturing process increase and the cost increases, but the interior lamp itself is also a heating element, so that much power is consumed accordingly.

  On the other hand, in Patent Document 1, the heat conductive member constitutes a part of the cold air passage, the heat conductive member is interposed between the cold air passage and the refrigerator compartment, and a part of the cold heat by the cold air passing through the cold air passage is heated. It discharges into the refrigerator compartment through the conductive member. In this case, since the temperature difference between the cold air in the cold air passage and the refrigerator compartment is large, condensation occurs on the surface of the heat conductive member on the refrigerator compartment side. Therefore, the refrigerator of Patent Document 1 includes a directional discharge unit, and cool air is simultaneously discharged from the entire area of the directional discharge unit. Therefore, the cold air after exiting the cold air passage flows along the surface of the heat conductive member on the refrigerator compartment side in the refrigerator compartment, thereby suppressing dew condensation.

  Generally, a cold air passage provided on the back side of the refrigerating room is provided with a cold air discharge port, and communicates with the refrigerating room through the cold air discharge port. The cold air discharge ports are usually scattered over the upper and lower sides of the cold air passage, and the cold air discharge ports are vertically scattered to make the temperature in the refrigerator compartment uniform.

  Therefore, even if cold air is discharged simultaneously from the entire area of the directional discharge portion as in Patent Document 1, there is a concern that the portion where there is no cold air discharge port in the heat conductive member cannot completely eliminate condensation.

  In addition, the cool air in the cool air passage is guided from below to above in the passage. Therefore, if the amount of cool air discharged from the directional discharge portion is excessively increased, the dew condensation suppressing action of the heat conductive member is improved, but the flow direction of the cool air is greatly changed. At this time, since the loss of the cold air flow is increased, the amount of cold air circulation is reduced. In order to secure a certain amount of cold air circulation, the number of fans installed is increased or a larger fan is used, which tends to increase power consumption.

  Many of these problems become apparent due to the difference in the cold air circulation structure caused by the arrangement of the refrigerator compartment, the freezer compartment, and the vegetable compartment, and a specific configuration for solving this problem is not disclosed in Patent Document 1. .

  This invention is made | formed in view of the said subject, and makes it easy to overlook the inside of the refrigerator compartment provided in the uppermost stage, or makes it a subject to aim at the optimization of the food preservation | save environment in a refrigerator compartment.

  And it aims at providing the user-friendly refrigerator excellent in energy saving by solving either of these subjects.

In order to achieve the above object, in a refrigerator in which a heat insulating material is filled between an outer box and an inner box and the inside is a heat insulating space, and a refrigerator compartment is disposed at the uppermost stage as the heat insulating space, the present invention provides:
The plurality of cooling air passages that are provided on the left and right sides of the rear side of the refrigerating chamber and that extend vertically, the shelf member that divides the refrigerating chamber into a plurality of storage spaces, and the cold air passages that are provided on the left and right sides. A translucent cover member that covers the interior lamp that illuminates the refrigerated room and is mounted across the storage space, and a metal member that is attached to the cover member and extends vertically across the plurality of storage spaces. Prepared,
The cover member is a portion that is not covered with the metal member at the left and right ends, and has a belt-like portion that is inclined to the back of the refrigerator compartment and extends vertically across the plurality of storage spaces,
A cold air discharge port was provided on the side wall of the cold air passage on the side of the belt-like portion.

In the present invention described above, more preferred specific forms are as follows.
(1) The cover member is made of a resin material that is inferior in thermal conductivity to the metal member, and a side projection surface of the cold air discharge port is accommodated in the range of the belt-shaped portion.
(2) The cover member is attached such that a front wall of the cover member excluding the belt-like portion has a depth dimension matched to a side wall surface of the refrigerator compartment covering the cold air passage.
(3) A plurality of the cold air discharge ports are provided in the cold air passages provided on both the left and right sides, and separately from the cold air discharge ports, an upper cold air discharge that discharges cold air from above the cold air passages to the refrigerator compartment. An outlet is provided in each of the cold air passages, and the upper cold air discharge port is located above the uppermost shelf member among the shelf members attached to the refrigerator compartment.
(4) The amount of cold air discharged from the upper cold air discharge port is made larger than the total amount of cold air discharged from the plurality of cold air passages.

In addition, the second configuration of the present invention is a refrigerator in which a heat insulating material is filled between the outer box and the inner box so that the inside is a heat insulating space, and a refrigerator compartment is disposed at the top as the heat insulating space.
A cold air passage that is provided on the left and right sides of the back of the refrigerating chamber and extends vertically and through which cool air generated by a cooler passes, a shelf member that divides the refrigerating chamber into a plurality of storage spaces, and straddles the plurality of storage spaces. A metal member that extends vertically, a cool air discharge port that discharges cool air from the cool air passage to the storage space, and an upper cold air discharge port that is provided separately from the cool air discharge port and discharges cool air from the upper part of the cold air passage And a cold air return port disposed below the cold air discharge port and the upper cold air discharge port on the rear surface of the cold room and for returning the cold air after cooling the cold room to the cooler,
The top surface of the refrigerator compartment is inclined so that the front side is higher, and the total amount of cold air discharged from the upper cold air outlet is larger than the total amount of cold air discharged from the cold air outlet. .

Further, according to a third configuration of the present invention, a heat insulating material is filled between the outer box and the inner box so that the inside becomes a heat insulating space, and a refrigerator compartment is disposed at the uppermost stage as the heat insulating space. In the refrigerator where the freezer compartment is arranged across the partition wall,
A cooler that is provided behind the freezer and generates cool air to be sent to the refrigerating chamber and the freezer; and a cooler that is provided on the left and right sides of the back of the refrigerating chamber and extends vertically and is generated by the cooler. Cold air passage, a shelf member that divides the refrigerator compartment into a plurality of storage spaces, a metal member that extends vertically across the plurality of storage spaces, and discharges cold air from the cold air passage to the storage space A cold air outlet, an upper cold air outlet that is provided separately from the cold air outlet and discharges cold air from the upper part of the cold air passage, and is located below the cold air outlet and the upper cold air outlet on the back of the refrigerator compartment. A cool air return port for returning the cool air after cooling the refrigerating chamber disposed above the heat insulating partition wall to the cooler,
The top surface of the refrigerator compartment is inclined so that the front side is higher, and the total amount of cold air discharged from the upper cold air outlet is larger than the total amount of cold air discharged from the cold air outlet. .

  In the apparatus having the second configuration or the third configuration described above, the width dimension of the back surface portion of the refrigerator compartment is set to be six times or more the sum of the width dimensions of the cold air passage, and is from the upper cold air discharge port. The total amount of cold air discharged was 1.5 times or more the total amount of cold air discharged from the cold air outlet. At this time, the cooling effect of the refrigerator compartment was confirmed to the range where the width dimension of the back surface part of the refrigerator compartment was at least 10 times the sum of the width dimensions of the cold air passage.

  Further, in the apparatus having the second configuration or the third configuration described above, the width between the cold air passages is set to 300 mm or more, and the lateral width of the metal member is set to 300 mm or more.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in energy saving and can provide a user-friendly refrigerator.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of the refrigerator of the present embodiment. The refrigerator 1 is provided with a refrigerator compartment at the uppermost stage, and the front opening thereof is closed by a rotary refrigerator compartment door 2. Although the refrigerator compartment door 2 is a so-called double door type left and right door in FIG. 1, it may be configured to be covered with one door body.

  In the lower part of the refrigerator compartment, an ice making room and a temperature switching room closed by drawer type doors 3 and 4 are provided side by side. An automatic ice making device (not shown) is installed in the ice making chamber, and ice is stored in an ice storage container arranged at the bottom of the ice making tray. Then, by pulling out the ice making chamber door 3, the ice storage container is pulled out together, and the ice can be taken out. The storage room installed next to the ice making room is not necessarily a temperature switching room, and may be a freezing room.

  Furthermore, a freezer compartment is disposed at the lower part, and the front opening is covered with a drawer-type freezer compartment door 5. A freezer compartment container (not shown) is installed in the freezer compartment, and the freezer compartment container can be pulled out by pulling out the freezer compartment door 5. Therefore, the user of the refrigerator can easily take out the food inside.

  And the vegetable compartment is arrange | positioned in the lowest stage. The vegetable room is a storage room in a refrigerated temperature zone like the refrigerated room, and the front opening is covered by a drawer-type vegetable room door 6. A vegetable compartment container (not shown) is installed in the vegetable compartment and is pulled out together with the vegetable compartment door 6.

  FIG. 2 is a diagram showing the internal configuration of the refrigerator compartment of the present embodiment, FIG. 2 (a) is a front view showing the refrigerator compartment door 2 omitted, and FIG. 2 (b) is a diagram of FIG. 2 (a). AA sectional view and FIG. 2C are BB sectional views of FIG.

  The refrigerator compartment 20 includes an inner box 10 (indicated by reference numeral 10 in FIG. 2C) that constitutes the inner wall of the refrigerator compartment 20, and an outer box 11 that is an outer shell of the refrigerator 1 (reference numeral 11 in FIG. 2A). It is a heat insulating space filled with a heat insulating material.

  Inside the refrigerator compartment 20, a plurality of shelf members 21 for placing food are installed vertically. In the present embodiment, plate-like shelf members 21a and 21b are provided on the top and bottom, and a shelf member 21c that can be turned upside down is provided at the bottom. A plurality of the shelf members 21c are arranged on the left and right sides (reference numerals 21c1, 21c2) to enable efficient use of the food storage space. Further, in a space below the shelf member 21d installed in the lower part, a water supply tank 26 for storing water to be supplied to an ice tray in an automatic ice making device (not shown), and a drawer tray 27 that can organize and store small foods. A drawer tray 28 serving as a so-called ice greenhouse is installed. As described above, the inside of the refrigerator compartment 20 is partitioned by the shelf member 21, the drawer trays 27 and 28, etc., so that the food storage property is improved.

  An interior lamp 22 is installed on the inner box 10 surface on the back side of the refrigerator compartment 20. In the present embodiment, the interior lamp 22 is attached so that the light emitting part hangs downward from the socket part. The wiring from the socket portion is connected to a control device (not shown), and is controlled so that the interior lamp 22 is lit when the refrigerator compartment door 2 is opened.

  A panel-like back member 23 that covers at least a portion excluding the front surface of the interior lamp 22 is attached to the back surface of the refrigerator compartment 20. A cool air passage 30 is formed between the back member 23 and the inner box 10 surface. The cold air passage of the present embodiment has a structure that branches into a left cold air passage 30L and a right cold air passage 30R on the left and right sides of the refrigerator compartment 20.

  The back member 23 may be white, and even when a colored member is used, a light one is preferable. The same applies to the inner box 10. The reason for this will be described later.

  These cold air passages 30L and 30R have the inner wall surface of the inner box 10 as the inner wall surface of the inner box 10 and the rear wall surface of the rear member 23 as the rear wall surface of the rear member 23. The cool air passage 30 is formed by being attached. In the cold air passage 30, cold air generated by a cooler (not shown) is sent to the cold air passage 30 extended to the rear surface position of the refrigerator compartment 20 by a blower, and discharged to the refrigerator compartment 20 through the cold air outlets 30 a and 30 b. Is done. The cold air sent to the refrigerator compartment 20 cools the food in the refrigerator compartment 20 and then returns to the cooler again.

  The cooler constitutes a refrigeration cycle together with a compressor, a condenser, and a capillary tube, and cool air is generated by removing ambient heat by evaporating the refrigerant inside the cooler. Therefore, each storage room can be maintained at a set temperature by detecting the temperature in the refrigerator compartment 20 or the freezer compartment and controlling the ON / OFF of the operation of the compressor or the rotation speed of the compressor. it can.

  An interior lamp 22 is attached to the center side of the cold air passages 30L and 30R on the back surface of the refrigerator compartment 20. The interior lamp 22 is covered with a translucent cover member 24. Therefore, food does not collide with the interior lamp 22. Moreover, since the cover member 24 is a translucent member, the light of the interior lamp 22 can illuminate the inside of the refrigerator compartment 20. The material of the cover member 24 is not particularly limited, but a transparent resin material is preferable.

  The mounting height of the interior lamp 22 is higher than the shelf member 21a mounted on the uppermost stage, and illuminates the inside of the refrigerator compartment 20 widely from the back side. The cover member 24 covers the interior lamp 22, extends beyond the shelf member 21a, and is disposed across the food storage space defined by the shelf members 21a and 21b.

  The cover member 24 is not uniform in shape, and a convex portion 24M that protrudes toward the storage space side of the refrigerator compartment 20 is provided on the front surface of the mounting portion of the interior lamp 22. Since the interior lamp 22 is attached to the center part in the left-right direction on the back of the refrigerator compartment 20, the convex part 24M is also provided in the center part in the left-right direction of the cover member 24.

  In the present embodiment, the cover member 24 is further covered with a metal member 25. However, the entire surface of the cover member 24 is not covered, but a part thereof is covered. Specifically, at least the convex-shaped part 24M and the strip-shaped end parts on the left and right sides of the cover member 24 are exposed to the refrigerator compartment 20 side. Therefore, on both the left and right outer sides of the metal member 25, belt-like portions 24L and 24R extending up and down across the shelf member 21 are formed. The metal member 25 is preferably an aluminum material in view of workability and availability.

  As shown in FIG. 2C, the strips 24L and 24R are close to the left and right cold air passages 30L and 30R. The cover member 24 includes the convex portion 24M as described above, but the other portions are not completely planar, and the portions of the belt-like portions 24L and 24R are inclined to the back side. Therefore, when the cover member 24 is attached, a space 31 is formed on the back side of the cover member 24. That is, in the space 31, the front wall surface is the back surface of the cover member 24. The wall surface on the back side of the space 31 is the surface of the back member 23 on the refrigerator compartment 20 side where the back member 23 is attached, and the inner box 10 surface where the back member 23 is not attached.

  The depth dimensions of the left and right cool air passages 30L, 30R are the depth dimensions of the cover member 24 including the strip portions 24L, 24R within the height range to which the metal member 25 is attached (however, excluding the convex portion 24M). Larger than Moreover, in the height range in which the metal member 25 is attached, the depth direction between the front wall of the cover member 24 and the front side wall surface of the back member 23 that covers the cold air passage 30 in the portion excluding the convex portion 24M. The position is adjusted.

  In the present embodiment, a cold air discharge port 30a is provided from the cold air passage 30 toward the cover member 24 (see FIG. 2C). Accordingly, the cold air discharged from the cold air passage 30 (30L, 30R) to the refrigerating chamber 20 is blown out toward the belt-like portions 24 (24L, 24R) of the cover member 24, and thereafter, depending on the shape of the belt-like portions 24L, 24R. Guided toward the front of the refrigerator compartment 20.

  Since the cover member 24 is made of a (translucent) resin material and is made of a material that is inferior in thermal conductivity to the metal member 25 such as an aluminum material, even if it is a portion where the discharged cold air directly hits, condensation occurs. Is unlikely to occur. As a result, since cold air is not directly blown onto the metal member 25, dew condensation on the metal member 25 can be suppressed.

  Further, the cool air discharge ports 30L and 30R are not limited to the cool air discharge ports 30a facing the strips 24L and 24R. That is, the upper cold air discharge port 30b which discharges into the refrigerator compartment 20 from the upper direction of the cold air passages 30L and 30R is provided beyond the height range to which the metal member 25 is attached.

  A plurality of the cool air discharge ports 30a are provided in each of the cool air passages 30L and 30R according to the storage space defined by the shelf member 21. In the present embodiment, the discharge amount of the cool air discharged from the upper cool air discharge port 30b is larger than the total discharge amount of the cool air discharged from the plurality of cool air discharge ports 30a provided in each of the cool air passages 30L and 30R. In this way, the condensation of the metal member 25 is suppressed, and the flow loss of the cold air circulation path is reduced. Therefore, it can be set as the refrigerator excellent in energy saving, without raising the output of a fan or the increase in the number of installation of a fan. The structure of this cold air circulation will be described in detail later.

  Further, since the metal member 25 extends vertically across the storage spaces partitioned by the plurality of shelf members 21, the temperature deviation in each storage space is reduced and the temperature inside the refrigerator compartment 20 is reduced. Can be achieved. In particular, even if the amount of stored food is increased and a portion where the cold air blown out from the cold air discharge port is difficult to reach is generated, the left and right cold air discharge ports 30a are formed between the inclined strip portions 24L and 24R and the side wall of the cold air passage 30. Since it is provided in the space between, the cold air discharge port 30a itself is hardly blocked, and conduction of cold heat through the metal member 25 can be expected.

  Further, as described above, since the strips 24L and 24R extend vertically across the shelf member 21, even if food is stored on the front side of the strips 24L and 24R, the strips 24L and 24R are surrounded by the side walls of the cold air passage 30. The duct-shaped space having a substantially triangular cross section communicates vertically. This space becomes a cool air discharge space. Therefore, the cold air discharged from the cold air discharge port 30a is always guided to the space in the refrigerator compartment 20. In addition, since the metal member 25 is located in the vicinity of the duct-shaped space, it is possible to efficiently transmit cold heat.

  FIG. 3 is a view showing a structure for attaching the cover member 24 and the metal member 25 to the refrigerator compartment 20. As shown in the drawing, after the back member 23 is attached to the back of the refrigerator compartment 20, it is attached to the back of the refrigerator compartment 20 with the metal member 25 attached to the cover member 24 (see arrows in the figure). . At this time, the convex portion 24M is positioned on the front side of the interior lamp 22, and the cover member 24 is attached by the back member 23 so that the cover member 24 is positioned between the cold air passages 30 positioned on the left and right sides of the refrigerator compartment 20.

  As described above, both sides of the cover member 24 are inclined to the back, and the strips 24 </ b> L and 24 </ b> R extending vertically are formed on both sides of the metal member 25. Therefore, when the cover member 24 is attached, a space 31 is formed between the front surface of the back member 23 or the surface of the inner box 10 (see FIG. 2).

  As illustrated in FIG. 2B, a space 31 is provided in a portion sandwiched between the cold air passages 30 </ b> L and 30 </ b> R on both sides of the back surface of the refrigerator compartment 20. This space 31 is partitioned by the storage space of the refrigerator compartment 20 and the cover member 24. In the upper part of the space 31, specifically, at a position higher than the uppermost shelf member 21 a attached in the refrigerator compartment 20, the interior lamp 22 is installed with the light emitting part facing downward. A convex portion 24M is located in front of the interior lamp 22, and a large depth dimension of the space 31 is secured in this portion.

  A metal member 25 is attached to at least a portion excluding the convex portion 24M and the left and right belt-like portions 24L and 24R of the cover member 24. The convex portion 24M located in front of the interior lamp 22 is made of metal. Since it is not covered with the member 25, the light from the interior lamp 22 passes through the translucent cover member 24 and irradiates the inside of the refrigerator compartment 20. Therefore, the user can easily look around the refrigerator compartment 20. The convex portion 24M has a convex dimension extending from the rear end of the shelf member 21 to the front, so that the inside of the refrigerator compartment 20 can be widely irradiated.

  As shown in FIG. 4, the space 31 side surface of the cover member 24 is formed with a groove extending left and right. A large number of the grooves are lined up and down. Accordingly, when the cover member 24 is illuminated by the interior light 22, linear light streaks appear on the left and right in the groove portion, and the light streaks themselves become a kind of light source and irradiate the interior. In addition, in this embodiment, although it is set as the structure where a groove | channel extends right and left, it is not restricted to this, It does not interfere even if it is a groove | channel extended | stretched up and down. As shown in FIG. 4, the back surface of the cover member 24 may be composed of a plurality of planes or a plurality of curved surfaces, and corners may be provided at the boundaries between the surfaces.

  On the other hand, since the metal member 25 is a light-shielding member, light is not irradiated from the portion covered with the metal member 25, but the convex portion 24 protrudes further forward than the metal member 25. The metal member 25 is illuminated by the light source that appears on the cover member 24 to ensure the light intensity in the refrigerator compartment 20.

  When the interior lamp 22 emits light, light is irradiated not only in the refrigerator compartment 20 but also in the space 31 radially. The space 31 is a space surrounded by the back side surface of the cover member 24 and the inner box 10 surface or the back member 23 surface. As described above, since the white or light color resin material is used for the inner box 10 surface and the back surface member 23, the absorption of light in the space 31 is suppressed, and the inside of the warehouse which is reflected in the space 31 and is a light source. Light can be transmitted to a position away from the lamp 22.

  Although light is not irradiated to the refrigerator compartment 20 side from the part covered with the metal member 25 among the cover members 24, in this embodiment, the aluminum material is used for the metal members 25, and the cover member 24 is used. The transmitted light is reflected by the back surface of the metal member 25, and the light is transmitted into the space 31.

  The cover member 24 is provided with strips 24L and 24R extending vertically. Since the belt-like portions 24L and 24R are formed to be inclined rearward, it is easy to guide the light in the space 31 into the refrigerator compartment 20. Therefore, when the interior lamp 22 is lit, a band of light extending vertically appears at a position inside the left and right cold air passages 30L, 30R. In this embodiment, since the space 31 is formed by being covered with a white material, a light color material, or a metal member (via a translucent member) so that light can be easily transmitted, the interior lamp 22 is provided. Light can be transmitted to a position corresponding to the blind spot, and a band of light can appear across a plurality of storage spaces partitioned by the shelf member 21.

  That is, this light band is from the interior lamp 22 positioned further above the uppermost shelf member 21a to the vicinity of the storage space defined by the lower shelf member 21b, 21c or 21d. As a result, the inside of the refrigerator compartment 20 is illuminated.

  Grooves provided in the space 31 side surface of the cover member 24 so as to extend left and right are also provided in the belt-like portions 24L and 24R. Therefore, the strips 24L and 24R not only transmit light from the interior lamp 22, but also light streaks appear by the grooves, and the light streaks themselves play a role as light sources, so that the inside of the refrigerator compartment 20 is widened. Can be irradiated.

  In particular, in the present embodiment, the interior lamp 22 has a structure in which the light emitting part hangs down from the socket part, and in the space 31, an object that blocks light from the light emitting part to the lower side is eliminated as much as possible.

  Therefore, even if it is the case where it is set as the structure provided with the metal members 25 on the back, it is not necessary to install several interior lamps, and the inside of a refrigerator compartment can be brightly illuminated with a single interior lamp.

  This band of light appears by the space 31 and each member constituting it, and even if a large number of foods are stored in the refrigeration room 20, it is not blocked by this, and the inside of the refrigeration room 20 is not blocked. It can always be kept bright.

  Moreover, since the installation space of the interior lamp 22 can be ensured by providing the convex portion 24M as in the present embodiment, a plurality of interior lamps can be attached. By performing together with the above configuration, the inside of the refrigerator compartment 20 can be illuminated more brightly.

  Next, cooling of the refrigerator compartment 20 will be described with reference to FIG. FIG. 5 is a diagram showing a cold air circulation structure of the refrigerator compartment 20. As shown in FIG. 2, the cold air generated by the cooler is discharged to the refrigerator compartment 20 through the cold air passages 30L and 30R. That is, a cool air discharge port 30a that discharges cool air to each space partitioned by the shelf member 21, and an upper cool air discharge port 30b that opens upward in the cool air traveling direction of the cool air passages 30L and 30R are provided. The cold room 20 is cooled by supplying cold air from the discharge port.

  The cold air discharge amount of the cold air discharge port 30a and the upper cold air discharge port 30b has an opening area so as to increase the amount of cold air supplied from the upper cold air discharge port 30b as described above. The refrigerator of the present embodiment includes six cold air discharge ports 30a and two upper cold air discharge ports 30b. Therefore, if the amount of cool air discharged per unit time from one cool air outlet 30a is q, and the amount of cool air discharged per unit time from one upper cool air outlet 30b is Q (FIG. 5B). )), And the opening area of each discharge port is determined so as to satisfy the relationship of “2Q> 6q”.

  The effect by the said structure is as follows. In recent years, the storage capacity of the refrigerator has been increased, and the storage capacity of the refrigerator compartment 20 tends to increase accordingly. When cooling a storage room having a large storage capacity, it is required to lower the temperature of the cool air generated by the cooler or increase the amount of the cool air supplied. Accordingly, it has been required to increase the size of the blower as well as increase the efficiency of the refrigeration cycle. However, since an increase in the size of the blower causes a reduction in energy saving, it is desirable to use a blower that is as compact as possible.

On the other hand, in order to increase the capacity of the refrigerator compartment, it is required to reduce the size of the cooling structure and reduce the portion that does not become the storage space. However, if the cold air passage, which is the cold air supply portion on the back of the refrigerator compartment, is also reduced in size, there arises a conflicting problem that the ventilation resistance increases. For example, in order to realize a large capacity of the refrigerating compartment 20, by increasing the width dimension W ₁ of the rear portion of the refrigerating compartment 20 shown in FIG. 5 (a), cool air passage 30L, 30R to the width W ₂ of the small It is necessary to do. That is, when the width dimension ratio is W, increasing the capacity of the refrigerator compartment 20 indicates that the value of W (= W ₁ / 2W ₂ ) is increased (coefficient “2” is This is because two cold air passages are provided on the back of the refrigerator compartment 20).

Here, both the cold air discharge port 30a and the upper cold air discharge port 30b are openings having the same dimensions, the W ₁ dimension is fixed to 580 mm, and the cooling state in the refrigerator compartment 20 when the W ₂ dimension is 70 mm was measured. If the (size factor W = 4.1), and compared the case where W ₂ dimensions were measured cooling condition of the refrigerating compartment 20 when the 30mm and (size factor W = 9.7). As a result, it was found that the latter case was inferior in cooling capacity. In addition, it has been found from this examination that the temperature unevenness in the refrigerator compartment 20 increases as the dimensional coefficient W increases.

  The cause will be described with reference to FIG. FIG. 6 is a cross-sectional view showing a cooling structure of the refrigerator 1 of the present embodiment. As already described, the refrigerator 1 of the present embodiment includes the refrigerator compartment 20 in the upper part, and has a structure in which the front opening is closed by the refrigerator compartment door 2. In addition, a refrigerator having a so-called mid-freezer structure in which a freezer compartment 40 is disposed in the lower part of the refrigerator compartment 20 is provided. Therefore, the refrigerator compartment 20 and the freezer compartment 40 are partitioned by the heat insulating partition wall 33a so that the two rooms are insulated. Moreover, the vegetable room is located in the lowest stage, and the front is covered with the vegetable room door 6. By partitioning the vegetable compartment and the freezer compartment 40 by the heat insulation partition wall 33b, both compartments are insulated.

  The refrigerator compartment 40 located between the refrigerator compartment 20 and the vegetable compartment is composed of upper and lower freezer compartments, each of which is covered by a door. A cooler chamber 36 is located on the back of the refrigerator compartment 40, and in this cooler chamber 36, a cooler 34 that generates cool air, and the cool air generated by the cooler 34 is sent to each storage chamber. A blower 35 is provided. The cooler 34 and the blower 35 are disposed so as to be accommodated between the heat insulating partition walls 33a and 33b. That is, the cooler 34 and the blower 35 are accommodated in the rear projection plane of the freezer compartment 40, and the cold air sent from the blower 35 to the refrigerator compartment 20 is sent to the cold air passage 30 via a damper (not shown).

  On the other hand, the cold air after cooling the refrigerating chamber 20 returns to the cooler chamber 36 through a cold air return passage (not shown) from a cold air suction port 32 provided on the back surface of the refrigerating chamber 20, and this structure forms a cold air circulation structure. Is formed. In the refrigerator 1 of the present embodiment, the freezer compartment 40 is disposed at the lower part of the refrigerator compartment 20 and both chambers are insulated by the heat insulating partition wall 33a, so that the cold air discharged from the back of the refrigerator compartment 20 is stored in the refrigerator compartment 20. After cooling the interior, the structure reaches the cold air inlet 32 provided on the back of the refrigerator compartment 20.

  The cool air suction port 32 is positioned below any one of the cool air discharge port 30a and the upper cool air discharge port 30b in order to return the cool air after cooling the inside of the refrigerator compartment 20 to the cooler chamber 36. However, since the cold air inlet 32 is located on the back surface of the refrigerator compartment 20 like the cold outlets 30a and 30b, the discharged cold air reaches the front of the refrigerator compartment 20 as indicated by the dotted arrows in FIG. There was no fear of short circuit. In particular, the short circuit phenomenon may become conspicuous as the capacity of the refrigerator compartment 20 increases.

  Furthermore, when the size of the cold air passages 30L and 30R is smaller than the size of the refrigerator compartment 20, there is a problem that it is difficult to secure the air volume. At this time, a portion where the cold air is supplied and a portion where the cold air does not reach are generated in the refrigerator compartment 20, and temperature unevenness occurs in the refrigerator compartment 20.

  In order to reduce the temperature unevenness and achieve a uniform temperature in the refrigerator compartment 20, the present embodiment adopts a so-called mid-freezer structure refrigerator and adopts the following structure.

  First of all, in order to realize the flow of cold air as shown by the solid line arrow in FIG. 6 and to cool the entire refrigerator compartment 20, as described above, the cold air discharged from the upper cold air outlet 30b The discharge amount was set to be larger than the total discharge amount of the cold air discharged from the cold air discharge ports 30a provided in plural in each of the cold air passages 30L and 30R. This configuration has an effect of reducing the flow loss in the circulation path because the direction of the cool air traveling in the cool air passages 30L and 30R and the direction in which the cool air is discharged from the upper cool air discharge port 30b to the refrigerating chamber 20 are close. . Therefore, the cooling efficiency can be improved.

  Further, as a result of examining the relationship between the cool air discharge amount of the cool air discharge port 30a and the upper cool air discharge port 30b, even if the dimension coefficient W exceeds 6.0, the temperature unevenness suppressing effect is maintained in a fixed case. It was found that

  That is, the relationship between the amount of cold air from the cold air discharge port 30a and the amount of cold air from the upper cold air discharge port 30b is evaluated, and from the relationship between the cold air amount and the wind speed, the amount of cold air discharged from the upper cold air discharge amount 30b is It was found that the temperature unevenness in the refrigerator compartment 20 can be reduced by setting the amount of cold air discharged from the cold air discharge port 30a to 1.5 times or more, that is, 2Q> 9q.

  For example, when the cold air discharge port 30a has an opening of 50 mm × 5 mm and the upper cold air discharge port 30b has an opening of 30 mm × 10 mm, the cold air is supplied by the blower 35 from the cooler chamber 36 located on the back of the freezer compartment 40. The effect of soaking was demonstrated.

Specifically, when the blower 35 is rotated at a predetermined rotational speed, the wind speed of the cold air discharged from the cold air discharge port 30a was 0.5 m / s, whereas the cold air discharged from the upper cold air discharge port 30b. The wind speed was 2.0 m / s. This is because the cool air discharge port 30a discharges cool air to the inside of the refrigerator compartment 20 in the width direction, whereas the upper cool air discharge port 30b blows out cool air in a direction close to the cool air traveling direction in the cool air passage, so the ventilation resistance is small. Because it becomes. Accordingly, the total amount 2Q of cool air discharged from the two upper cool air discharge ports 30b is 1200 mm ² · m / s, and the total amount 6q of cool air discharged from the six cold air discharge ports 30a is 750 mm ² · m / s. Met.

  At this time, since the cold air discharged from the upper cold air discharge port 30b can obtain a sufficient wind speed, it reaches the pocket storage container attached to the refrigerator compartment door 2 and can cool the refrigerator compartment as a whole. That is, not the dotted arrow as shown in FIG. 6, but the cold air discharged from the upper cold air outlet 30b is supplied into the refrigerator compartment 20 as shown by the solid arrow, and the food stored in the pocket storage container can be sufficiently cooled. Met.

  In addition, in the refrigerator of this embodiment, the control board 37 which controls each part of a refrigerator is arrange | positioned in the back | upper surface of the main body housing | casing, and the ceiling surface of the refrigerator compartment 20 is comprised so that the near side of an opening may become higher. is doing. Therefore, the cold air from the upper cold air discharge port 30b tends to move forward and contributes to the cooling of the entire refrigerator compartment 20.

  Each storage space partitioned by the shelf member is supplied with cold air discharged from the cold air discharge port 30a. As described above, more than half of the cold air passing through the cold air passage 30 is discharged from the upper cold air. Since most of the cold air is discharged from the outlet 30b to the refrigerator compartment 20 and is supplied to the front side of the refrigerator compartment 20, the amount of cold air supplied to the back side of the refrigerator compartment 20 is reduced.

  Therefore, in the present embodiment, the metal member 25 is provided on the back surface between the left cold air passage 30L and the right cold air passage 30R, and the cold air discharge port 30a discharges the cold air toward the inner side in the width direction of the refrigerator compartment. The structure. In addition, the shape of the cover member 24 is adopted so that the cold air discharged from the cold air discharge port 30a is guided toward the front of the refrigerator compartment 20.

  By providing the metal member 25, the cooling capacity on the back side of the refrigerator compartment 20 is ensured from the high thermal conductivity, and the temperature of each storage space partitioned by the shelf member can be equalized. Yes. That is, by providing the metal member 25, the temperature of each storage space can be equalized even if the distance between the cold air passage 30L on the left side and the cold air passage 30R on the right side is increased.

  Specifically, it has been verified that the distance between the cold air passages can be 300 mm or more, and that at least 400 mm can be sufficiently cooled as a refrigerator compartment. That is, when the width dimension of the refrigerator compartment 20 becomes large, the distance between both cold air passages will become large. At this time, regardless of the width of the cold air passages 30L and 30R, there may be a problem that the cold air does not reach the central portion of the wide refrigerator compartment. Then, when the distance between both cold air passages was examined, as a result of using the cold air discharge ports 30a & 30b and the metal member 25 of the above-described embodiment, the cooling of the refrigerating chamber is reduced even if the distance between the cold air passages is 300 mm or more. Has been found to be sufficient.

  In other words, even if a space of 300 mm or more is provided between the cold air passage 30L on the left side and the cold air passage 30R on the right side, by arranging the metal member 25 between the cold air passages, It means that warming and cooling can be achieved. The metal member 25 is disposed so as to straddle the upper and lower storage spaces defined by the shelf member 21 with respect to the upper and lower sides, and the metal member 25 having a width of 300 mm or more may be used with respect to the left and right.

  In the case of the present embodiment, since the belt-like portions 24L and 24R of the cover member 24 are located inside the cold air passages 30L and 30R in the width direction, the left-right width of the metal member 25 is larger than the distance between the both cold air passages. Get smaller.

  Here, the case where the metal member 25 is not disposed in the structure having the dimension factor W = 4.1 described above is compared with the case where the metal member 25 is disposed in the structure having the dimension factor 9.7. Table 1 shows the results of measuring the temperatures in the storage spaces 20a to 20c shown in FIG. The distance between the cold air passages when W = 9.7 was 380 mm.

このように、冷蔵室２０の収納容積が大きくなり、Ｗ＝６.０を超えるような場合であっても、金属製部材２５を備えることによって、冷蔵室２０内の均温化が可能となった。そして、表１の検討によれば、Ｗ＝１０程度までは十分な冷却が可能であることがわかった。また、これらの構成によって、冷蔵室２０の平均温度も低くすることができ、省エネ性の向上が可能となった。

Thus, even if the storage volume of the refrigerator compartment 20 becomes large and exceeds W = 6.0, the temperature inside the refrigerator compartment 20 can be equalized by providing the metal member 25. It was. According to the examination of Table 1, it was found that sufficient cooling is possible up to about W = 10. Moreover, the average temperature of the refrigerator compartment 20 can also be made low by these structures, and the improvement in energy-saving property was attained.

  Moreover, according to temperature equalization of the refrigerator compartment 20, the variation between the detection value of the refrigerator temperature sensor attached in the refrigerator compartment 20 and the actual average temperature of the refrigerator compartment 20 can be suppressed, and the structure excellent in energy saving And can. In fact, as shown in FIG. 5 (b), when the refrigerator temperature sensor 38 is attached to the storage space located below the storage space 20c, the difference between the average temperature and the detected value is slightly reduced. I was able to.

  As described above, according to the refrigerator of this embodiment, it is possible to provide a refrigerator that is excellent in energy saving and easy to use.

It is an external appearance perspective view of the refrigerator of this embodiment. It is a figure which shows the internal structure of a refrigerator compartment. It is a figure which shows the attachment structure of a cover member and metal members. It is a perspective view in the state where a metal member was attached to a cover member. It is a figure which shows the cold air circulation structure of a refrigerator compartment. It is sectional drawing which shows the cooling structure of the refrigerator of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 10 ... Inner box, 11 ... Outer box, 20 ... Cold room, 21 ... Shelf member, 22 ... Interior lamp, 23 ... Back member, 24 ... Cover member, 24M ... Convex-shaped part, 24L / 24R ... Band-like part 25 ... Metal member, 30L / 30R ... Cold air passage, 30a ... Cold air outlet, 30b ... Upper cold air outlet, 31 ... Space, 32 ... Cold air inlet, 33 ... Insulating partition wall, 34 ... Cooler, 35 ... Blower, 36 ... Cooler room, 37 ... Control board, 38 ... Refrigerator temperature sensor, 40 ... Freezer room.

Claims (10)

In the refrigerator in which a heat insulating material is filled between the outer box and the inner box to make the inside a heat insulating space, and a refrigerator compartment is arranged at the top as the heat insulating space,
The plurality of cooling air passages that are provided on the left and right sides of the rear side of the refrigerating chamber and that extend vertically, the shelf member that divides the refrigerating chamber into a plurality of storage spaces, and the cold air passages that are provided on the left and right sides. A translucent cover member that covers the interior lamp that illuminates the refrigerated room and is mounted across the storage space, and a metal member that is attached to the cover member and extends vertically across the plurality of storage spaces. Prepared,
The cover member is a portion that is not covered with the metal member at the left and right ends, and has a belt-like portion that is inclined to the back of the refrigerator compartment and extends vertically across the plurality of storage spaces,
The refrigerator provided with the cold air discharge port in the side wall at the side of the said strip | belt-shaped part of the said cold air path.   The resin material having inferior thermal conductivity than the metal member is used for the cover member, and a side projection surface of the cold air discharge port is stored in the range of the belt-shaped portion. The refrigerator described.   2. The refrigerator according to claim 1, wherein the cover member is attached such that a front wall of the cover member excluding the belt-like portion has a depth dimension matched to a side wall surface of the refrigerator compartment covering the cold air passage. .   A plurality of the cold air outlets are provided in the cold air passages provided on both the left and right sides, and separately from the cold air outlets, upper cold air outlets for discharging cold air from above the cold air passage to the refrigerator compartment are respectively provided. 2. The refrigerator according to claim 1, wherein the upper cold air discharge port is located above the uppermost shelf member among the shelf members attached to the refrigerator compartment.   5. The refrigerator according to claim 4, wherein the total amount of cold air discharged from the upper cold air discharge port is made larger than the total amount of cold air discharged from the plurality of cold air discharge ports. In the refrigerator in which a heat insulating material is filled between the outer box and the inner box to make the inside a heat insulating space, and a refrigerator compartment is arranged at the top as the heat insulating space,
A cold air passage that is provided on the left and right sides of the back of the refrigerating chamber and extends vertically and through which cool air generated by a cooler passes, a shelf member that divides the refrigerating chamber into a plurality of storage spaces, and straddles the plurality of storage spaces. A metal member that extends vertically, a cool air discharge port that discharges cool air from the cool air passage to the storage space, and an upper cold air discharge port that is provided separately from the cool air discharge port and discharges cool air from the upper part of the cold air passage And a cold air return port disposed below the cold air discharge port and the upper cold air discharge port on the rear surface of the cold room and for returning the cold air after cooling the cold room to the cooler,
The top surface of the refrigerator compartment is inclined so that the front side is higher, and the total amount of cold air discharged from the upper cold air outlet is larger than the total amount of cold air discharged from the cold air outlet. refrigerator. A heat insulating material is filled between the outer box and the inner box to make the inside a heat insulating space, and a refrigerator compartment is arranged at the top as the heat insulating space, and a freezing room is arranged with this freezing room and the heat insulating partition wall in between. In the refrigerator
A cooler that is provided behind the freezer and generates cool air to be sent to the refrigerating chamber and the freezer; and a cooler that is provided on the left and right sides of the back of the refrigerating chamber and extends vertically and is generated by the cooler. Cold air passage, a shelf member that divides the refrigerator compartment into a plurality of storage spaces, a metal member that extends vertically across the plurality of storage spaces, and discharges cold air from the cold air passage to the storage space A cold air outlet, an upper cold air outlet that is provided separately from the cold air outlet and discharges cold air from the upper part of the cold air passage, and is located below the cold air outlet and the upper cold air outlet on the back of the refrigerator compartment. A cool air return port for returning the cool air after cooling the refrigerating chamber disposed above the heat insulating partition wall to the cooler,
The top surface of the refrigerator compartment is inclined so that the front side is higher, and the total amount of cold air discharged from the upper cold air outlet is larger than the total amount of cold air discharged from the cold air outlet. refrigerator. The width dimension of the back part of the refrigerator compartment is set to be 6 times or more the sum of the width dimensions of the cold air passage,
8. The refrigerator according to claim 6, wherein the total amount of cold air discharged from the upper cold air outlet is 1.5 times or more of the total amount of cold air discharged from the cold air outlet.   The refrigerator according to claim 8, wherein a width dimension of a back surface portion of the refrigerator compartment is set to be within 10 times a sum of width dimensions of the cold air passage. The refrigerator according to claim 6 or 7, wherein a width between the cold air passages is set to 300 mm or more, and a lateral width of the metal member is set to 300 mm or more.

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