JP2019027765A - refrigerator - Google Patents

Abstract

To provide a refrigerator that has high-freshness holding performance at low cost.SOLUTION: A refrigerator includes a storeroom including a storage container. The storage container is formed with a catalyst storage part. The catalyst storage part is provided with a catalyst in which platinum and ruthenium are added to an identical carrier.SELECTED DRAWING: Figure 23

Description

  The present invention relates to a refrigerator.

  There is a demand for a refrigerator capable of controlling the humidity well while maintaining the freshness of the food in the refrigerator. In relation to such a technique, a technique described in Patent Document 1 is known.

  In Patent Document 1, in a refrigerator having a storage chamber configured to include a storage container partitioned into at least a first space and a second space, when the storage container is stored in the refrigerator, A cover member is disposed above the storage container so as to cover the opening of the storage container, a catalyst storage part is formed on a wall surface that partitions the first space and the second space, and the catalyst storage part includes: It is communicated with the first space and the second space, and describes that a platinum catalyst is stored in the catalyst storage portion. In Patent Document 1, not only platinum but also a catalyst obtained by supporting fine particles of a transition metal such as ruthenium on silica pores is used to decompose ethylene gas in a storage container into carbon dioxide. It is also described to do.

Japanese Patent No. 5936758

  However, platinum is an expensive raw material, and when used in large quantities, it leads to an increase in the cost of a refrigerator. On the other hand, when an attempt is made to constitute a catalyst only with a transition metal other than platinum, the ability to decompose ethylene gas into carbon dioxide is low, and the effect of maintaining the freshness of food does not appear clearly.

  The present invention has been made in view of such problems, and an object thereof is to provide a refrigerator that is low in cost and has a high freshness keeping performance.

  The present inventors have intensively studied to solve the above problems. As a result, in a refrigerator having a storage chamber configured with a storage container, a catalyst storage portion is formed in the storage container, and a catalyst in which platinum and ruthenium are added to the same carrier is provided in the catalyst storage portion. The present inventors have found that the above problems can be solved.

  It is possible to provide a refrigerator with low cost and high freshness retention performance.

It is a front view of the refrigerator of this embodiment. It is a perspective view of the lower container in which the upper container was attached in the refrigerator. It is a perspective view of the vegetable compartment in which the vegetable container cover was arrange | positioned in the refrigerator. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a perspective view from the front side of an upper stage container. It is a perspective view from the back side of an upper stage container. It is a perspective view from the lower side of an upper stage container. Each member which comprises a lock handle is shown, (a) is the perspective view from the back side, (b) is the exploded perspective view, (c) is a BB line sectional view in (a). is there. It is a perspective view from the upper part of a vegetable container cover. It is a perspective view from the lower part of a vegetable container cover, (a) is the whole figure, (b) is a figure which expands and shows the C section of (a). It is a side view of a vegetable container cover. It is a perspective view from the front side of a lower container. It is a perspective view from the back side of a lower container. It is a perspective view of the member attached to the side wall of the back side of a lower container, (a) is a lower container cover attached to an inner surface, (b) is a case attached to an outer surface. It is a disassembled perspective view of the transpiration | evaporation cassette attached to the outer back surface of a lower container, (a) is the state which attached the transpiration board, (b) is the state which removed the transpiration board. It is a figure which shows a mode when the water | moisture content inside a back side lower stage space is condensed and the condensed water is transpired to the exterior of a vegetable room. It is a figure which shows the modification of the lower container cover attached inside a lower container, and is a perspective view of the transpiration unit cover attached instead of a lower container cover. It is a perspective view which shows the inside of a lower container from the front side when the transpiration unit cover shown in FIG. 17 is attached to the inside of a lower container. It is sectional drawing of a lower container when a lower container is accommodated in the refrigerator. It is sectional drawing which shows a lower container when a lower container is pulled out a little from the inside of a refrigerator. It is sectional drawing which shows a mode when the rear side upper stage space is open | released by releasing a lock handle, after fully pulling out the lower container from the inside of a refrigerator. It is sectional drawing of a refrigerator when a lower container and an upper container are fully pulled out from the inside of a refrigerator. It is a figure which shows the result of the experiment which measured the carbon dioxide production amount by each catalyst. It is a figure which shows the result of the experiment which measured the freshness maintenance effect by each catalyst.

  Hereinafter, a form (this embodiment) for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of the refrigerator 10 of the present embodiment. The refrigerator 10 shown in FIG. 1 has a refrigerator compartment left door 2, a refrigerator compartment right door 3, an ice making door 4a, a quick freezer compartment door 4b, a freezer compartment door 5, and a vegetable compartment on the front of the refrigerator body 1. And a door 6. The refrigerator compartment left door 2 can be rotated in the front direction of the paper by an upper hinge 7a and a lower hinge 8a. Furthermore, the refrigerator door right door 3 can be rotated in the front direction of the paper by an upper hinge 7b and a lower hinge 8b. That is, the refrigerator compartment left door 2 and the refrigerator compartment right door 3 are provided so as to be able to open the door, and a refrigerator compartment (not shown) is formed in a space formed by these and the refrigerator body 1.

  Further, the ice making room door 4a, the quick freezing room door 4b and the freezing room door 5 can be pulled out toward the front side of the drawing. In the space formed by these and the refrigerator main body 1, an ice making room, a quick freezing room, and a freezing room (all not shown) are formed. Similarly, the vegetable compartment door 6 can be pulled out toward the front side of the page. Further, a vegetable room 100 (a storage room, see FIG. 2) is formed in a space constituted by this and the refrigerator body 1.

  FIG. 2 is a perspective view of the lower container 101 to which the upper container 102 is attached in the refrigerator 10. In the vegetable compartment 100, the inner box 124 of the refrigerator body 1 (see FIG. 1) constitutes the wall surface (left wall, right wall, and bottom wall) of the vegetable compartment 100. Moreover, the vegetable container cover 105 (refer FIG. 3) arrange | positioned above the vegetable compartment 100 comprises the upper wall of the vegetable compartment 100. FIG. Therefore, in the vegetable compartment 100, the internal sealability of each of the lower container 101 and the upper container 102 is ensured to some extent.

  In the vegetable compartment 100, a lower container 101 (storage container) and an upper container 102 (storage container, inner container) are accommodated in a front side and a back side (hereinafter sometimes referred to as “front-rear direction”) so that they can be pulled out. ing. However, in this embodiment, even if the lower container 101 moves in the front-rear direction, the position inside the lower container 101 of the upper container 102 does not change. However, although details will be described later, the upper container 102 can also be pulled out to the front side when the user operates the lock handle 106 (see FIG. 8).

  A machine room (not shown) for arranging a compressor (not shown) and the like outside the cabinet is formed on the back side of the vegetable room 100. Therefore, the bottom wall is higher on the back side than on the front side. The lower container 101 is provided with a glass partition 103. As a result, the lower container 101 is divided into two compartments (a front space 101B on the front side, a rear lower space 101A on the back side, and a rear upper space 101C, both not shown in FIG. 2). And the upper container 102 is arrange | positioned so that the space of the back side of the two divisions of the lower container 101 may be covered.

  FIG. 3 is a perspective view of the vegetable compartment 100 in which the vegetable container cover 105 (cover member) is arranged in the refrigerator 10. The vegetable container cover 105 is disposed so as to cover the upper openings of the lower container 101 and the upper container 102 (see FIG. 4, neither of which is shown in FIG. 3). The vegetable container cover 105 is arranged above the lower container 101 when the lower container 101 is accommodated in the refrigerator 10. Therefore, when the lower container 101 is completely pulled out from the refrigerator 10, the vegetable container cover 105 remains inside the refrigerator 10, and the inside of the lower container 101 is opened to the outside.

  The vegetable container cover 105 is made of a light transmissive resin. A knurl (a plurality of grooves extending from the front side to the back side) 105 a is formed on the front side of the vegetable container cover 105. And when a user pulls out the lower container 101 and the upper container 102 to the front side and uses them, the light from the LED illumination attached outside and above the vegetable room 100 passes through the knurled 105a. Thus, the inside of the lower container 101 and the upper container 102 is irradiated. As described above, since the knurl 105a is formed by a plurality of grooves, light incident on the knurl 105a is diffused. Further, since the knurled 105a is formed by a plurality of grooves, the surface area is large. Therefore, a wide range is irradiated while suppressing the occurrence of shadows.

  Further, a transpiration board 105b is disposed on the lower surface of the vegetable container cover 105 (that is, the surface facing the inside of the vegetable chamber 100). Furthermore, a plurality of communication holes 105 c (internal and external communication holes) that communicate the inside and outside of the vegetable compartment 100 are formed on the upper surface of the vegetable container cover 105. Details of these points will be described later with reference to FIGS.

  Further, a cold air outlet (not shown) is formed on the wall surface of the vegetable room 100 or the heat insulating partition wall located between the vegetable room 100 and the freezer room. And the cold air supply adjustment means 141 which can control supply of the cold air which cools the vegetable compartment 100 is provided in this blower outlet. As a result, the cool air blown into the vegetable compartment 100 enters the rear space 101A (see FIG. 4) to some extent, and comes out from the front side. Furthermore, the humidity in the rear space 101A can be prevented from rising excessively, and condensation at unintended parts is prevented.

  4 is a cross-sectional view taken along line AA in FIG. 4 also shows the vegetable compartment door 6 shown in FIG. The lower container 101 is partitioned into three spaces, a rear lower space 101A, a front space 101B, and a rear upper space 101C. Among these, the rear lower stage space 101 </ b> A is formed by dividing the lower container 101 by the partition 103 disposed inside the lower container 101 and the lower surface of the upper container 102. The front space 101 </ b> B is formed by dividing the lower container 101 by the front side surface of the upper container 102, the partition 103, and the vegetable container cover 105. The rear upper space 101C is formed by dividing the lower container 101 by an upper container 102 and a vegetable container cover 105.

  Among these spaces, on the back side of the rear lower space 101A, there are three spaces inside the lower container 101 (that is, the rear lower space 101A, the front space 101B, and the rear upper space 101C). A transpiration cassette 112 for controlling the humidity in the space is arranged. Details of the transpiration cassette 112 will be described later with reference to FIG.

  In addition, a communication hole 102a (space communication hole) that connects the rear lower stage space 101A (first space) and the rear upper stage space 101C (second space) is formed on the bottom surface of the upper container 102. . As a result, it is possible to dehumidify both the rear lower space 101A and the rear upper space 101C.

  FIG. 5 is a perspective view of the upper container 102 from the front side. The lock handle 106 (support / fix release mechanism) disposed on the front side of the upper container 102 is operated by the user to operate the upper container 102 supported and fixed inside the lower container 101 at a normal time. It can be moved back and forth. The lock handle 106 includes a push-down portion 106a that allows the upper container 102 to move to the front side when pressed, and a hollow portion 106b that is formed to be slightly depressed at the upper end on the front side of the upper container 102. Is done. Then, when the user holds the depression 106b and presses it with the thumb or the like of the hand holding the pressing part 106a, the support and fixation of the upper container 102 in the lower container 101 is released. Thereby, the upper container 102 can be moved in the front-rear direction.

  Also, below the front side of the lock handle 106, three spaces (hereinafter referred to as “the lower space 101 </ b> A”, the front space 101 </ b> B, and the rear upper space 101 </ b> C) are provided via the inside of the lock handle 106. Communication holes 106c (space communication holes) that communicate with each other (sometimes collectively referred to as “spaces”) are formed. Further, a fumed silica-supported platinum-ruthenium catalyst 118 (see FIG. 8B) is accommodated inside the lock handle 106 at a position where it can come into contact with air in each space. Therefore, the air taken into the lock handle 106 through the communication hole 106c comes into contact with the fumed silica-supported platinum-ruthenium catalyst 118, and then the air in contact with the fumed silica-supported platinum-ruthenium catalyst 118 is supplied to each space. Will be. Thereby, the air in the front space 101B reaches the dew condensation surface 101a (see FIG. 16) formed on the transpiration board 105b (see FIG. 10) in the rear upper space 101C and the back side in the rear lower space 101A. be able to. Therefore, the humidity of the air in the front space 101B can be controlled.

  FIG. 6 is a perspective view of the upper container 102 from the back side. A communication hole 106 d is also formed below the back side of the lock handle 106 through which the spaces communicate with each other via the inside of the lock handle 106. As with the communication hole 106c, the air taken into the lock handle 106 through the communication hole 106d contacts the fumed silica-supported platinum-ruthenium catalyst 118, and then the fumed silica-supported platinum-ruthenium catalyst. The air in contact with 118 is supplied to each space. The communication hole 106d faces the rear upper space 101C through a hole 102b formed on the front side surface of the upper container 102.

  FIG. 7 is a perspective view from the lower side of the upper container 102. Also below the lock handle 106, a communication hole 106e is formed through the interior of the lock handle 106 to communicate the three spaces of the rear lower space 101A, the front space 101B, and the rear upper space 101C. . As in the communication holes 106c and 106d, the air taken into the lock handle 106 through the communication hole 106e comes into contact with the fumed silica-supported platinum-ruthenium catalyst, and then the fumed silica-supported platinum-ruthenium. The air in contact with the catalyst is supplied to each space. The communication hole 106e faces the rear lower space 101A through a hole 102c formed in the bottom surface of the upper container 102.

  8A and 8B show the members constituting the lock handle 106, wherein FIG. 8A is a perspective view from the back side, FIG. 8B is an exploded perspective view, and FIG. It is B line sectional drawing. In FIG. 8C, for the sake of simplicity of illustration, a part of the mechanism for releasing the lock (supporting and fixing of the upper container 102) is omitted.

  As shown in FIG. 8A, the lock handle 106 includes a catalyst cover 106f having a communication hole 106d, a handle case rear 106g to which the catalyst cover 106f is attached, and a handle case front attached to the front side of the handle case rear 106g. 106h and a handle lever 106j configured integrally with the pressing portion 106a (see FIG. 5). 8B, when the catalyst cover 106f is removed from the lock handle 106, the fumed silica-supported platinum-ruthenium catalyst 118 is disposed in the lock handle 106 so as to extend in the left-right direction. Has been. The fumed silica-supported platinum-ruthenium catalyst 118 is disposed inside the lock handle 106 so as to avoid a mechanism (not shown) for unlocking the lock handle 106.

  In FIG.8 (c), the thick line arrow has shown the direction through which air flows. As shown in FIG. 8C, the fumed silica-supported platinum-ruthenium catalyst 118 can come into contact with the air in each space through the communication holes 106c, 106d, and 106e. Although not shown by arrows, the air in each space is supplied to another space without contacting the fumed silica-supported platinum-ruthenium catalyst 118.

  Here, the fumed silica-supported platinum-ruthenium catalyst 118 will be described. Unlike the photocatalyst, the fumed silica-supported platinum-ruthenium catalyst 118 is a catalyst that decomposes ethylene and trimethylamine contained in the air in each space even when there is no light from an LED or the like. Carbon dioxide and water vapor are generated by the decomposition of ethylene by the fumed silica-supported platinum-ruthenium catalyst 118. Since the generated carbon dioxide is supplied into each space through the communication holes, the pores of the vegetables stored in each space are closed, and the respiration of the vegetables is suppressed. As a result, the freshness of the vegetables is maintained for a long time. The installation location of the fumed silica-supported platinum-ruthenium catalyst 118 is not limited to the inside of the lock handle 106, and a catalyst storage portion is provided on at least one wall surface that divides each space, and the fumed silica-supported platinum is provided in the catalyst storage portion. -The ruthenium catalyst 118 may be accommodated. In this case, a communication hole communicating with each space is also formed in the catalyst housing portion. Moreover, the structure which provides a catalyst accommodating part in one wall surface of each space, and forms a communicating hole in the wall surface which partitions off each space may be sufficient.

  Further, when carbon dioxide is dissolved in water existing on the surface of the vegetable or the like stored in the vegetable room 100, the surface of the vegetable or the like becomes acidic. This suppresses the growth of microorganisms on the vegetable surface.

  The fumed silica-supported platinum-ruthenium catalyst 118 in the refrigerator 10 is in a granular form and is accommodated in the lock handle 106 in a state of being packed in a bag. Accordingly, the granular fumed silica-supported platinum-ruthenium catalyst 118 is appropriately mixed in the bag when the upper container 102 is pulled out and stored. Therefore, the air is prevented from coming into contact with the granules only from one direction, and the catalytic function is maintained.

  FIG. 9 is a perspective view from above of the vegetable container cover 105. As described above, the knurl 105 a is formed on the upper surface of the front side of the vegetable container cover 105. Light from an LED illumination (not shown) is irradiated to the inside of the vegetable compartment 100 from the outside of the knurl 105a. Further, the vegetable container cover 105 has an inside and outside of a rear upper space 101C formed between the upper container 102 (not shown in FIG. 9) disposed below the vegetable container cover 105 and the vegetable container cover 105. A plurality of communication holes 105c that communicate with each other are formed. In the refrigerator 10, the number of the communication holes 105c is 24, and the communication holes 105c are formed so as to include the vicinity of a cold air return port (not shown) formed on the right side of the back side of the vegetable compartment 100.

  10A and 10B are perspective views from below of the vegetable container cover 105, where FIG. 10A is an overall view thereof, and FIG. 10B is an enlarged view of a portion C of FIG. FIG. 10A shows a state where the vegetable container cover 105 is observed from below the front side of the vegetable container cover 105. As shown to Fig.10 (a), the transpiration board 105b (moisture occlusion discharge | release member) is arrange | positioned at the lower surface (surface which faces the inside of the upper container 102) of the vegetable container cover 105. FIG. The transpiration board 105b is a flat plate member formed by weaving resin fibers such as PET fibers, and allows air to pass through but absorbs liquid moisture. The absorbed moisture can be evaporated (released) to the air.

  As shown in FIG. 10B, a rib 105 d is formed on the lower surface of the vegetable container cover 105 so as to face the communication hole 105 c that communicates the inside and outside of the vegetable compartment 100. And the transpiration board 105b is hold | maintained on the lower surface of the vegetable container cover 105 by inserting the transpiration board 105b in the space 105e formed between the communicating hole 105c and the rib 105d. Further, by holding the transpiration board 105b in the space 105e, the communication hole 105c is positioned under the vertical projection of the transpiration board 105b, and the communication hole 105c is blocked by the transpiration board 105b. Thereby, while the air containing the water | moisture content in the lower container 101 and the upper container 102 is discharged | emitted outside the vegetable compartment 100 through the communicating hole 105c, the vegetable compartment 100 passes through the communicating hole 105c from the outside of the vegetable compartment 100. It is possible to prevent cold air from directly entering the interior.

  Further, when the air inside the rear upper space 105C comes into contact with the vegetable container cover 105, the moisture contained in the air may condense on the vegetable container cover 105 and generate condensed water. However, the generated dew condensation water is absorbed by the transpiration board 105b disposed over the entire area above the upper container 102. Therefore, the fall of the dew condensation water to the rear side upper space 10C is suppressed.

  FIG. 11 is a side view of the vegetable container cover 105. In FIG. 11, the lower container 101 and the lower container 102 disposed below the vegetable container cover 105 are indicated by virtual lines. The transpiration board 105 b faces the inside of the upper container 102 and is attached to the lower surface of the vegetable container cover 105. Although not shown in FIG. 11, cold air for cooling the vegetable compartment 100 flows above the vegetable container cover 105. For this reason, the cool air that flows is circulated so as to lick the transpiration board 105b exposed from the communication hole 105c. As a result, the liquid water absorbed by the transpiration board 105b is discharged into the cold air flowing as water vapor. That is, the moisture in the vegetable compartment 100 is absorbed by the transpiration board 105b, and the moisture absorbed is released to the outside of the vegetable compartment through the communication hole 105c. Therefore, it is possible to prevent the transpiration board 105b from excessively absorbing water and preventing water droplets from dropping into the upper container 102.

  FIG. 12 is a perspective view of the lower container 101 from the front side. The inside of the lower container 101 is divided into a front side and a back side by a partition 103. A rear lower space 101A is formed in the back side of the lower container 101, and a front space 101B (not shown in FIG. 12) is formed in the front side of the lower container 101. . A lower container cover 110 is attached to the back side of the lower container 101 so as to cover a surface to which condensed water adheres (condensation surface 101a, not shown in FIG. 12). The appearance of condensed water will be described later with reference to FIG.

  FIG. 13 is a perspective view from the back side of the lower container 101. As described above, the partition 103 that divides the inside of the lower container 101 is supported by the pair of guide portions 104 provided on the left and right inner walls of the lower container 101. Further, on the opposite surface (that is, the outer surface) of the lower container 101 to which the lower container cover 110 (see FIG. 12) is attached, the cold air blowing surface 113 from the cold air supply adjusting means 141 (see FIG. 3) and A transpiration cassette 112 for transpiring the condensed water to the cold air on the surface to which the condensed water adheres is attached.

  FIG. 14 is a perspective view of a member attached to the back side wall of the lower container 101, (a) is a lower container cover 110 attached to the inner surface, and (b) is a case 112 attached to the outer surface. is there. As shown in FIG. 14A, the lower container cover 110 is formed with a plurality of slits 110a. The direction of the formed slit 110a is formed so as to be directed downward when flowing from the front side to the back side. Even when condensed water is generated on the surface of the lower container cover 110 by forming the slit 110a in such a direction, the condensed water passes through the slit 110a and the transpiration board 112e (described later) disposed on the back side thereof. And the fall of the condensed water to the rear lower space 101A is prevented.

  Further, the surface of the lower container cover 110 is subjected to a texture process. That is, the surface of the lower container cover 110 is roughened. Accordingly, the hydrophilicity of the lower container cover 110 is increased to make it difficult for water droplets to be formed, thereby making it difficult for the user to notice the presence of water droplets. Therefore, it is prevented that the user has anxiety that water drops may fall.

  Further, as shown in FIG. 14B, the transpiration cassette 112 is fitted with a case 112a that houses a cover 112c that is fitted so as to cover a transpiration board 112d (see FIG. 15) not shown in FIG. And a lower case 112b for fixing the cover 112c.

  FIG. 15 is an exploded perspective view of the transpiration cassette 112 attached to the outer back surface of the lower container 101. FIG. 15A shows a state in which the transpiration board 112d is attached, and FIG. 15B shows a state in which the transpiration board 112d is removed. . The state shown in FIG. 15A also shows a state in which the cover 112c is rotated and removed from the state shown in FIG. 14 to expose the transpiration board 112d. Explaining this point, the lower end of the case 112a and the lower end of the cover 112c are locked so as to be rotatable. Accordingly, as shown in FIG. 15 (a), when the cover 112c is removed from the case 112a, the cover 112c rotates around the locked portion and moves downward. Thereby, the plate-like transpiration board 112d is exposed to the front side.

  Further, a transpiration board 112e extending from the front side to the back side is connected to the lower end of the plate-like transpiration board 112d integrally with the transpiration board 112d. Therefore, the integral thing consisting of the transpiration board 112d and the transpiration board 112e arrange | positioned inside the transpiration cassette 112 is a L-shaped thing comprised with the resin fiber.

  Since these transpiration boards 112d and 112e are made of the same material as the transpiration board 105b described with reference to FIG. 10, detailed description thereof is omitted. Although details will be described later, the water condensed on the inner side surface (condensation surface 101a shown in FIG. 16) of the lower container 101 hangs down on the inner side surface and is absorbed by the transpiration board 112e. The absorbed water diffuses the transpiration board 112e and the transpiration board 112d in this order, and reaches the transpiration board 112d.

  As shown in FIG. 15 (b), on the back side of the transpiration board 112d, a protective material 112f having a ventilation hole 112g through which air can pass is disposed. The cold air flowing through the back side of the transpiration cassette 112 contacts the back side of the transpiration board 112d through the ventilation hole 112g. Thereby, the water | moisture content which reached the transpiration board 112d is transpired by the cold air which contacted.

  FIG. 16 is a diagram illustrating a state in which moisture inside the rear lower space 101A is condensed and the condensed water is evaporated to the outside of the vegetable room 100. Cold air from the cold air supply adjusting means 141 is blown onto the cold air blowing surface 113 formed integrally with the rear side wall of the lower container 101. As a result, the wall temperature in the vicinity of the spraying surface 113 is lower than the wall temperature of other portions. Therefore, moisture in the air that comes into contact with the inner wall surface (condensation surface 101a) of the lower container 101 is condensed, and condensed water 117 is generated. The generated condensed water 117 flows down from the gap 114 formed in the lower part of the rear side wall of the lower container 101 to the outside of the lower container 101 due to its own weight, and further flows down to the transpiration board 112e through the slit 112c1 formed in the cover 112c. . The gap 114 may be formed at another location below the lower container 101. For example, the gap 114 may be formed on the bottom surface and the back side of the lower container 101.

  The moisture absorbed by the transpiration board 112e diffuses inside the transpiration boards 112e and 112d. At this time, the moisture absorbed is diffused upward in the evaporating board 112d arranged in the vertical direction. The moisture diffusing in the transpiration board 112d is evaporated to the cold air contacting the transpiration board 112d as described above, whereby the moisture in the air inside the vegetable compartment 100 is discharged to the outside of the vegetable compartment 100. In this manner, the transpiration boards 112e and 112d suck the condensed water that has flowed down the inner surface of the rear side wall out of the lower container 101 from the gap portion 114 formed on the rear side wall and release it to the cold air. At this time, cold air is brought into direct contact with the rear side wall of the lower container 101, and the rear side wall itself is used as a dew condensation surface. It becomes possible to control the humidity.

  In the refrigerator 10 of this embodiment, as shown in FIG. 16, the vertical length (height) of the transpiration board 112d and the vertical length (height) of the spray surface 113 are substantially the same. Yes. Here, the length in the left-right direction of the transpiration board 112d and the length in the left-right direction of the spray surface 113 are substantially the same as shown in FIG. Therefore, the area of the transpiration board 112d is substantially the same as the area of the spray surface 113. And by blowing cool air to the spraying surface 113 which is the outer surface of the lower container 101, and evaporating the moisture in the warehouse from the transpiration cassette 112 arranged in the lower part, the outer surface of the small lower container 101 is effectively used. The internal humidity can be controlled.

  Here, the modification of the lower container cover 110 attached to the back side of the lower container 101 is demonstrated.

  FIG. 17 is a view showing a modified example of the lower container cover 110 attached to the inside of the lower container 101, and is a perspective view of a transpiration unit cover 116 attached instead of the lower container cover 110. The lower container cover 110 shown in FIG. 14A has a plate shape, but an L-shaped transpiration unit cover 116 can be used instead of the lower container cover 110.

  In the transpiration unit cover 116, a plurality of slits 116 a are formed so that a downward air flow is generated, similarly to the slit 110 a in the lower container cover 110. However, on the right side of the transpiration unit cover 116, an opposing member 116b is formed to face the right side surface of the lower container 101. Like the lower container cover 110, the surface of the transpiration unit cover 116 is textured.

  FIG. 18 is a perspective view showing the inside of the lower container 101 from the front side when the transpiration unit cover 116 shown in FIG. 17 is attached to the inside of the lower container 101. The transpiration unit cover 116 is fixed to the inner wall of the lower container 101 with screws or the like (not shown). As described with reference to FIG. 16, in the refrigerator 10, dew condensation water is intentionally generated by blowing cool air to the spray surface 113 (see FIG. 16) formed on the outer surface of the lower container 101. It has become.

  However, the spray surface 113 and the right outer surface of the lower container 101 are close to each other. Therefore, when the lower container 101 is cooled by blowing cold air to the blowing surface 113, the cold heat is transmitted to the right inner surface, and condensed water may be generated on the right inner surface. Therefore, as shown in FIG. 18, a transpiration unit cover 116 including a facing member 116 b is disposed on the right side on the back side in order to collect condensed water that may be generated on the inner surface on the right side. In addition, the L-shaped transpiration unit cover 116 has a dew condensation water receiving portion also formed on the bottom surface, and has an inclination such that the bottom surface is lowered to the back side. Therefore, even if the dew condensation water generated on the right side surface reaches the bottom surface, it can be guided to the back surface side, and can eventually absorb moisture by the transpiration boards 112e and 112d and release it to the cold air. It is.

  On the right side surface of the transpiration unit cover 116, that is, below the opposing member 116b, a groove 116c is formed having an inclination so as to descend from the front side toward the back side. Then, as a result of cooling the right side surface of the lower container 101, when condensed water is generated on the surface of the opposing member 116b, the condensed water dropped by its own weight is received by the groove 116c inclined from the right side wall to the rear side wall. Falling into the container 101 is prevented. The dew condensation water that has been received flows through the groove 116c to the back side, passes through the dew condensation water discharge part 116d provided close to the slit 116a, and is a transpiration board disposed on the back side of the transpiration unit cover 116. 112e. And by doing in this way, the dew condensation water which arose on the surface of the opposing member 116b is also discharged | emitted outside the vegetable compartment 100. FIG. That is, since the dew condensation water guide member extending from the right side wall adjacent to the rear side wall to the rear side wall is attached to the inner surface of the container, dew condensation occurs not only on the dew condensation water condensing inside the rear side wall but also inside the right side wall. The condensed water thus supplied is also supplied to the inside of the rear side wall, and can finally be discharged to the outside of the rear side wall by the transpiration board 112e.

  In addition, although these are fixed with the screw | thread etc. which are not illustrated between the inner wall of the lower container 101, and the opposing surface of the opposing member 116b, some gaps have arisen. However, since an air layer is formed between them, heat transfer performance is poor, and therefore, dew condensation water is hardly generated. Therefore, the generation of condensed water between these gaps is sufficiently suppressed.

  Next, the operation of the lower container 101 and the like when the vegetable compartment door 6 of the refrigerator 10 is pulled out will be described with reference to FIGS. Note that in FIGS. 19 to 22, illustration of some of the members described above is omitted for simplification of illustration.

  FIG. 19 is a cross-sectional view of the lower container 101 when the lower container 101 is completely accommodated in the vegetable compartment 100 of the refrigerator 10 main body. FIG. 19 shows a cross section when the vicinity of the lock handle 106 is cut from the front side to the back side and viewed from the left-right direction. As shown in FIG. 19, when the lower container 101 is accommodated in the refrigerator 10, the vegetable container cover 105 is the whole of the lower container 101 and the upper container 102 that are openings of the lower container 101 (that is, the front space 101B). And the rear upper space 101C). Thereby, the airtightness inside these spaces is enhanced. Therefore, the internal carbon dioxide concentration can be kept at 1000 ppm or more in all the spaces in the storage container 101, that is, not only in the rear lower space 101A but also in the front space 101B and the rear upper space 101C. Further, since the transpiration board 105b is positioned in the vertical projection of the rear upper space 101C, the humidity in the rear upper space 101C can be more effectively controlled.

  Also, at this time, the transpiration board 105b (see FIG. 10, not shown in FIG. 19) and the transpiration cassette 112 (see FIG. 6, not shown in FIG. 19) arranged on the lower surface of the vegetable container cover 105, The humidity inside 100 is controlled. And each space which comprises the vegetable compartment 100 is connected to the communicating hole 102 (refer FIG. 4 and not shown in FIG. 19) formed in the bottom face of the upper container 102, and communicating holes 106c, 106d formed in the lock handle 106. 106e (see FIG. 8, not shown in FIG. 19) communicates, and thereby the overall humidity of the vegetable compartment 100 is controlled.

  FIG. 20 is a cross-sectional view showing the lower container 101 when the lower container 101 is slightly pulled out from the refrigerator 10, specifically when the front space 101 </ b> B is pulled out of the vegetable compartment 100. When the lower container 101 is pulled out to the front side, the upper container 102 is also pulled out to the front side accordingly. However, the relative position of the upper container 102 inside the lower container 101 does not change, and even if the lower container 101 is pulled out to the front side, the upper container 102 remains supported and fixed above the rear lower space 101A. There is.

  When the lower container 101 is pulled out to the front side, the vegetable container cover 105 slides on the upper end of the upper container 102 in accordance with the pulling operation, and the upper end portion 105d of the vegetable container cover 105 contacts the front side surface of the lock handle 106. To do. Thereby, even if the lower container 101 is pulled out to the front side, only the front space 101B is opened to the outside (exposed from the vegetable container cover 105), and the opening of the rear upper space 101C is covered with the vegetable container cover 105. The airtightness of the rear upper space 101C is maintained. Therefore, the concentration of carbon dioxide generated from vegetables or the like can be maintained higher in the rear upper space 101C than in the front space 101B. In addition, when the lower container 101 is pulled out to the front side, the amount of movement of the vegetable container cover 105 is smaller than the amount of movement of the upper container 102. Therefore, when the user wants to use only the front space 101B, the operation of the vegetable container cover 105 and the lock handle 106 is not required.

  When the lower container 101 is further pulled out to the front side from the state shown in FIG. 20, the lower container 101 is pulled out while the vegetable container cover 105 remains inside the refrigerator 10 main body. That is, when the rear upper space 101 </ b> C is also pulled out of the vegetable compartment 100, not only the opening of the front space 101 </ b> B but also a partial opening of the rear upper space 101 </ b> C is exposed from the vegetable container cover 105.

  FIG. 21 is a cross-sectional view showing a state where the rear upper space 101C is released by releasing the lock handle 106 after the lower container 101 is completely pulled out from the refrigerator 10. By operating the lock handle 106, the vegetable container cover 105 moves so that the upper end portion 105 d (not shown in FIG. 21) on the front side of the vegetable container cover 105 is above the upper end of the lock handle 106. Thus, the rear upper space 101C is opened to the outside, and further, the upper container 102 can be pulled out to the front side.

  FIG. 22 is a cross-sectional view of the refrigerator 10 when the lower container 101 and the upper container 102 are completely pulled out from the refrigerator 10. When the upper container 102 is completely pulled out, the lower end on the front side of the upper container 102 is placed on the upper end of the partition 103, thereby enabling stable extraction of vegetables and the like. Further, when the upper container 102 is completely pulled out, the vegetable container cover 105 is disposed with a slight inclination from the back side to the front side. That is, the vegetable container cover 105 is arranged inside the refrigerator 10 so that the height in the vertical direction of the front end portion (the upper end portion 105d) is slightly higher than the rear end portion 105e. As a result, a wide space (extraction port) opened to the outside of the upper container 102 can be secured, and it becomes easy to take out vegetables and the like.

  Here, the fumed silica-supported platinum-ruthenium catalyst used in the present embodiment will be described. Conventional mesoporous silica is a special silica in which regular pores are synthesized, and is therefore an expensive silica. However, by increasing the surface area of the pores, it has been found that even fumed silica, which is lower in cost than mesoporous silica, can be used as a catalyst support substrate. In addition, although the desired performance cannot be obtained even if only one ruthenium metal particle is supported, the addition of platinum and ruthenium to the same carrier makes it possible to lower the cost and achieve the same performance as compared to only one platinum. I found out

  FIG. 23 shows a conventional structure in which a platinum catalyst supporting platinum on mesoporous silica is provided in a storage container, and the structure of this embodiment. In the storage container, 90 g of saury, 200 g of minced meat, 300 g of chicken leg, and some sardines. It is a figure which shows the result of the experiment which measured the carbon dioxide increase amount in the storage container after progress for 15 hours when 150 g and 150 g of dried azimirin were stored under -1 degreeC, and the numerical value in a figure is a carbon dioxide gas increase amount. (Ppm). “1% Pt / TMS” in FIG. 23 is a catalyst having a conventional structure, which is a catalyst in which platinum 1% is supported on mesoporous silica, and “0.5% Pt / 1% Ru / AEROSIL” is a catalyst 118 of this embodiment. 1 is a fumed silica (trade name: Aerosil 380), a catalyst in which 0.5% of ruthenium is supported on platinum by 1%. And shows a catalyst in which 1% of ruthenium is supported by 1% of platinum on fumed silica (trade name Aerosil 380). In addition,% of platinum and ruthenium has shown wt% which is a weight ratio of each metal to the whole weight containing a silica.

  According to FIG. 23, “0.5% Pt / 1% Ru / AEROSIL” and “1% Pt / 1% Ru / AEROSIL” containing ruthenium are clearer than the conventional structure “1% Pt / TMS”. There is a large increase in carbon dioxide. That is, it can be seen that a catalyst containing ruthenium has a higher ability to decompose carbon components from food stored in a storage container by catalytic reaction to produce carbon dioxide. Next, when comparing the amount of carbon dioxide increase of “0.5% Pt / 1% Ru / AEROSIL” and “1% Pt / 1% Ru / AEROSIL”, the amount of carbon dioxide increase of the conventional structure “1% Pt / TMS” is 609 ppm. When 100 is 100, “0.5% Pt / 1% Ru / AEROSIL” is 156, and “1% Pt / 1% Ru / AEROSIL” is 154, indicating that the performance is almost the same. From this, it can be seen that the loading of expensive platinum can be halved by adding 1% ruthenium.

  Next, FIG. 24 will be described. FIG. 24 shows experimental results of comparative evaluation by measuring the K value of the sword fish for the freshness preservation effect after three days of storage for the sword fish in the food stored in the storage container shown in FIG. Here, the K value is one of indexes indicating freshness, and the lower the value, the better the freshness. It can be seen that the K value is higher under all conditions than the initial value before storage after 3 days, but the value is smaller than that without catalyst and the freshness maintenance is effective with the catalyst. Furthermore, compared with the conventional “1% Pt / TMS”, the “0.5% Pt / 1% Ru / AEROSIL” and “1% Pt / 1% Ru / AEROSIL” of this embodiment have a lower K value, It was shown that the catalyst of this embodiment has higher storage stability than the conventional catalyst. Therefore, from FIG. 23 and FIG. 24, by blending ruthenium into the silica-supported platinum catalyst of the present embodiment, the performance before half can be exceeded even if the amount of expensive platinum used is halved.

  While the present embodiment has been described with reference to the drawings, the present invention is not limited to the above-described embodiment. For example, you may arrange | position the above-mentioned catalyst not only in a vegetable compartment but in the indirect cooling chamber separately formed in the refrigerator compartment. Specifically, an outer member, a lid member that opens and closes the outer member, and a decompression unit that depressurizes the storage chamber surrounded by the outer member and the lid member. A configuration in which the catalyst is provided may be considered.

10 Refrigerator 100 Vegetable room (storage room)
101 Lower container (storage container)
101A Rear lower space (second space)
101B front space 101C rear upper space (first space)
102 Upper container (inner container, storage container)
102a Communication hole (space communication hole)
103 Partition 105 Vegetable container cover (cover member)
105a knurl 105b transpiration board (moisture storage and release member)
105c communication hole (internal / external communication hole)
105d rib 106 lock handle (support / fix release mechanism)
106a Depressing part 106b Recessed part 106c Communication hole 106d Communication hole (space communication hole)
106e Communication hole (space communication hole)
110 Lower container cover 112 Transpiration cassette 113 Blowing surface 114 Gap 116 Transpiration unit cover 118 Fumed silica supported platinum-ruthenium catalyst

Claims (4)

In a refrigerator having a storage room configured with a storage container,
A catalyst storage portion is formed in the storage container,
The refrigerator having a catalyst in which platinum and ruthenium are added to the same carrier in the catalyst storage unit. In a refrigerator having a storage chamber configured to include a storage container partitioned into at least one space or two spaces of a first space and a second space,
A catalyst storage portion is formed in the storage container,
The catalyst storage portion is in communication with a space in the container,
A refrigerator having a catalyst in which platinum and ruthenium are supported on fumed silica in the catalyst storage unit. In a refrigerator including an outer member, a lid member that opens and closes the outer member, and a decompression unit that decompresses a storage chamber surrounded by the outer member and the lid member,
A refrigerator comprising a catalyst containing platinum and ruthenium that decomposes ethylene and trimethylamine in the storage chamber.   The refrigerator according to any one of claims 1 to 3, wherein the ruthenium is contained in an amount of 1 wt% or more.

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