JP2019056500A - refrigerator - Google Patents

Abstract

To provide a refrigerator that prevents the occurrence of an unfilled portion in a foam heat insulating material, even when a unit having a substrate or the like is disposed on a side face of the inside of the refrigerator, and has high heat insulation performance.SOLUTION: A refrigerator has: a control panel having a surface member, a control substrate provided on the back side of the surface member, and a substrate storage part for storing the control substrate and fixing the surface member; a vacuum heat insulating material provided between the inner box and outer box; and a foam heat insulating material with which a gap between a bottom 42a of the substrate storage part and the vacuum heat insulating material is filled. On the bottom 42a of the substrate storage part, a gas drainage hole 42h is formed.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a refrigerator.

  Patent Document 1 describes a refrigerator in which an operation panel is provided on a side surface in a warehouse.

JP 2003-176978 A

  However, there is no vacuum heat insulating material on the back side (outer box side) of the operation panel, and there is a wide space between the heat insulating material cover (substrate housing portion) and the outer box where the foam heat insulating material easily flows. However, in order to improve the heat insulation performance, when the vacuum heat insulating material is also arranged on the back side of the operation panel, the gap into which the foam heat insulating material flows is narrowed by that amount, and unfilled parts of the foam heat insulating material can occur. There is sex.

  The present invention solves the above-described problem, and even when a unit including a substrate or the like is disposed on a side surface in a warehouse, the occurrence of unfilled portions of foam insulation is suppressed, and a refrigerator with high heat insulation performance is provided. The purpose is to do.

  The present invention provides a unit member having a front surface member, a circuit board provided on the back surface side of the front surface member, and a circuit board housing portion for housing the circuit board and fixing the front surface member, and an inner box and an outer box. In a refrigerator comprising a vacuum heat insulating material provided between, and a foam heat insulating material filled between the bottom surface of the substrate housing portion and the vacuum heat insulating material, a gas vent hole is formed in the bottom surface of the substrate housing portion. It is formed.

  ADVANTAGE OF THE INVENTION According to this invention, even when the unit containing a board | substrate etc. is arrange | positioned on the side surface in a store | warehouse | chamber, generation | occurrence | production of the unfilled location of a foam heat insulating material can be suppressed, and a refrigerator with high heat insulation performance can be provided.

It is an external appearance perspective view of the refrigerator which concerns on 1st Embodiment. It is a front view which shows the inside of a refrigerator compartment. It is the sectional view on the AA line of FIG. It is a principal part enlarged view of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is the top view which looked at the state which left the control board from the operation panel and removed the board | substrate accommodating part from the back side. It is a longitudinal cross-sectional view of an operation panel. It is the schematic which shows the positional relationship of an operation panel and a heat insulation box, (a) is 1st Embodiment, (b) is a comparative example. It is the schematic which shows the positional relationship of the operation panel of 2nd Embodiment, and a heat insulation box. It is the schematic which shows the positional relationship of the operation panel and heat insulation box of 3rd Embodiment. (A) is a graph which shows the relationship between urethane density and foaming pressure, (b) is the schematic which shows the load and deformation | transformation amount at the time of calculating | requiring case rigidity. It is the schematic which shows the state which provided the interposition member between the board | substrate accommodating part and the vacuum heat insulating material. It is the perspective view which looked at the board | substrate storage part from the front side (compartment inner side) in the state which removed the surface member and the control board. It is XX sectional drawing of FIG. In FIG. 13, it is a figure which shows the state which has arrange | positioned the double-sided tape. It is the YY sectional view taken on the line of FIG.

  Hereinafter, refrigerator 1A, 1B, 1C which concerns on embodiment of this invention is demonstrated with reference to drawings. In the following description, the “up and down”, “left and right”, and “front and back” directions shown in FIG. In the following description, a 6-door is described as an example, but the invention is not limited to a 6-door refrigerator. Moreover, in each embodiment, the same code | symbol is attached | subjected about the same structure and the overlapping description is abbreviate | omitted.

(First embodiment)
FIG. 1 is an external perspective view of the refrigerator according to the first embodiment.

  As shown in FIG. 1, the refrigerator 1 </ b> A is configured by, for example, arranging a refrigerator room 2, an ice making room 3, an upper freezer room 4, a lower freezer room 5, and a vegetable room 6 from the upper side. The ice making chamber 3 and the upper freezing chamber 4 are provided side by side. The refrigerator compartment 2 is provided with two-sided refrigerator compartment doors 2a and 2b divided into left and right.

  Moreover, 1 A of refrigerators are separated by the heat insulation box 10 comprised by filling the inside of a store | warehouse | chamber with the foaming heat insulating material inside. The heat insulating box 10 includes a vacuum heat insulating material 50 (FIG. 3) in addition to the foam heat insulating material, and the heat insulating property is enhanced by the vacuum heat insulating material 50. The heat insulating box 10 includes an outer box 11 forming an outer shell, and inner boxes 12 constituting each storage room for storing food in the refrigerator compartment 2, the ice making room 3, the upper freezer compartment 4, the lower freezer compartment 5, the vegetable compartment 6, and the like. And have.

  The refrigerator 1A includes a known refrigeration cycle including a compressor (compressor), a condenser (condenser, not shown), a capillary tube (decompression means, not shown), and a cooler (evaporator).

  The refrigerator 1 </ b> A includes an operation panel 20 (unit member) in the refrigerator compartment 2. This operation panel 20 is provided on the left side in the cabinet. Note that the position of the operation panel 20 is not limited to the left side surface, and may be provided on the right side surface.

  The operation panel 20 has a rectangular surface member 21, and the surface member 21 is provided with a plurality of (six in this embodiment) push-type operation buttons 22. Further, the operation panel 20 is located on the front side of the partition shelf 2 c provided in the refrigerator compartment 2.

  FIG. 2 is a front view showing the inside of the refrigerator compartment. Note that FIG. 2 shows a state in which the doors 2a and 2b and the internal partition shelf 2c are removed.

  As shown in FIG. 2, the outer box 11 of the heat insulation box 10 is made of a thin steel plate, and constitutes a housing of the refrigerator main body (heat insulation box 10). Further, the outer box 11 is formed by integrally forming the left and right side plates 11a, 11b and the top plate 11c from a steel strip using a forming roll or the like, and a bottom plate (not shown) and a back plate 11d (see FIG. 3) can be assembled with screws.

  The inner box 12 of the heat insulating box 10 is formed by a vacuum forming method in which a single resin sheet is heated and stretched by applying an air blow, which is then placed in a mold and formed into a container shape. The inner box 12 is formed by integrally forming a left side wall 12a, a right side wall 12b, a back wall 12c, a top wall 12d (see FIG. 1), and a bottom wall 12e (see FIG. 1).

  FIG. 3 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 3, the heat insulating box 10 is formed in a U shape in a cross-sectional view in the horizontal direction. The side plates 11a and 11b of the outer box 11 extend parallel to the front-rear direction.

  The side wall 12a of the inner box 12 has an inclined surface 12a1 that is gently inclined so as to approach the side plate 11a (outer side) of the outer box 11 from the back side (rear side) to the front side (front side). Yes. This inclined surface 12a1 is for ensuring releasability from the mold, and is called a so-called taper. The operation panel 20 is provided on the surface (side wall 12a) on which the inclined surface 12a1 (draft taper) is formed. Note that the side wall 12b is also provided with an inclined surface symmetrically with the side wall 12a.

  A vacuum heat insulating material 50 is provided inside the heat insulating box 10 (inside the wall). The vacuum heat insulating material 50 is affixed to the inner surface of the side plate 11 a (outer plate) of the outer box 11. Further, the vacuum heat insulating material 50 is arranged such that the front end thereof is located on the front side (front side, front side) of the operation panel 20 and the rear end thereof extends to the substantially rear end of the side plate 11a.

  Moreover, the vacuum heat insulating material 50 encloses the glass wool layer which is the inorganic fiber aggregate which comprises the core material arrange | positioned in the center part, an adsorbent, etc. with an inner bag material (not shown), and has gas barrier property, such as aluminum foil. It is vacuum-packed with an outer jacket material.

  For the inner bag material (not shown), a polyethylene film, a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film, or the like is used. That is, as the inner bag material, a material having low hygroscopicity and capable of being thermally welded and having little outgas (gas leakage) is used.

  As the adsorbent, a physical adsorption type synthetic zeolite that traps moisture and gas molecules in the pores is used. It should be noted that the adsorbent may be any adsorbent that adsorbs moisture or gas, not a synthetic zeolite, and a chemical reaction adsorbent that adsorbs moisture or gas through a chemical reaction such as silica gel, calcium oxide, calcium chloride, or strontium oxide. It can also be used.

  For the jacket material, a polypropylene film having low hygroscopicity is provided as a surface layer, and an aluminum vapor deposition layer is provided as a moisture-proof layer on a polyethylene terephthalate film. The gas barrier layer is laminated so that an aluminum vapor deposition layer is provided on the ethylene vinyl alcohol copolymer film and faces the aluminum vapor deposition layer of the moisture-proof layer.

  In the present embodiment, a panel-like (flat plate) vacuum heat insulating material 50 is attached to the inner wall surface of the side plate 11a (outer plate), and between the side plate 11a (outer plate) and the side wall 12a (inner plate). The space formed is filled with a foam insulation such as rigid urethane foam.

  4 is an enlarged view of a main part of FIG.

  As shown in FIG. 4, the operation panel 20 includes a surface member 21 provided with operation buttons 22 (see FIG. 1), a control board 31 (circuit board) provided on the back side of the surface member 21, and the control board 31. And a substrate storage portion 41 for storing and fixing the surface member 21. The operation button 22 (see FIG. 1) is, for example, a press operation type, and the temperature in the refrigerator compartment 2, the ice making room 3, the upper freezer room 4, the lower freezer room 5, the vegetable room 6 and the like is set. It is operated when changing.

  The surface member 21 includes a panel portion 21a on which an operation button 22 (see FIG. 1) is provided, and a rib 21b extending from the outer peripheral edge portion of the back surface of the panel portion 21a toward the side plate 11a of the outer box. Yes. Further, the surface member 21 is fixed to the substrate housing portion 41 by inserting ribs 21b into rectangular attachment holes 12f formed through the side wall 12a (inclined surface 12a1). The panel portion 21a has a rectangular shape larger than the opening area of the mounting hole 12f, and the entire outer peripheral edge portion 21r of the panel portion 21a is in contact with the entire opening edge portion 12g of the mounting hole 12f. Yes. Thereby, the whole attachment hole 12f is closed by the surface member 21, and the attachment hole 12f cannot be visually recognized from the outside (inside the cabinet).

  Further, in consideration of the draft taper, the surface member 21 has a front side (front side) that protrudes from the surface of the side wall 12a to the inner side of the side wall 12a (toward the center in the width direction). It is configured so that it does. Further, the surface 21 a 1 of the surface member 21 (panel portion 21 a) is configured to be substantially parallel (or parallel) to the vacuum heat insulating material 50. Note that “substantially parallel” includes parallelism and is closer to parallel than the inclination formed by the surface 21a1 and the inclined surface 12a1.

  The control board 31 is composed of a square-plate-like circuit board (appropriately abbreviated as “board”) on which various electric parts and electronic parts are mounted, and is located inside the rib 21 b of the surface member 21. In other words, the control board 31 is configured to be surrounded by the ribs 21b. As the number of operation menus on the operation panel 20 increases (the number of functions increases), the substrate becomes larger. A signal from the control board 31 is sent to a main board provided on the ceiling of the heat insulating box 10 so that the temperature in the cabinet is controlled from the main board.

  The substrate storage portion 41 is disposed on the back side of the side wall 12a (inside the heat insulating box 10), and extends along the back surface of the side wall 12a from the recess 42 that stores the control substrate 31 and the opening edge of the recess 42. And a collar portion 43.

  The concave portion 42 has a bottom surface portion 42a arranged in parallel with the control board 31, and a side surface portion 42b extending upright from the peripheral edge portion of the bottom surface portion 42a toward the side wall 12a, and directed toward the mounting hole 12f. Are configured to open. Further, the recess 42 is configured such that the depth H1 from the opening on the front side (front side) is shallower than the depth H2 from the opening on the back side (rear side) (H2> H1).

  Further, the bottom surface portion 42 a of the recess 42 is configured such that the back surface 42 c on the outer box 11 side is substantially parallel (or parallel) to the vacuum heat insulating material 50. Thereby, the clearance gap S between the back surface 42c of the bottom face part 42a and the vacuum heat insulating material 50 becomes uniform from the back side to the front side. Note that “substantially parallel” includes parallelism and is closer to parallel than the inclination formed by the back surface 42c and the inclined surface 12a1.

  The bottom surface portion 42a of the recess 42 is configured such that the back surface 42c on the outer box 11 side is substantially parallel (or parallel) to the outer box 11 (side plate 11a). Thereby, when the vacuum heat insulating material 50 is attached to the back surface of the side plate 11a, the gap S between the back surface 42c of the bottom surface portion 42a and the vacuum heat insulating material 50 can be made uniform from the back side to the front side.

  5 is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 5, the rib 21 b of the surface member 21 is formed with an abutting portion 21 d with which the outer peripheral edge portion of the control board 31 abuts. Thereby, the height position from the back surface of the surface member 21 can always be made constant.

  The concave portion 42 of the substrate storage portion 41 is formed with a reinforcing portion 41 s that protrudes from the bottom surface portion 42 a toward the surface member 21. The reinforcing portion 41s is formed in a cylindrical shape, and is formed so as to protrude from the center of the bottom surface portion 42a. Further, the tip 41s1 of the reinforcing portion 41s protrudes to a position that is flush with the side wall 12a.

  If the stored items stored in the substrate storage unit 41 are small, the substrate storage unit 41 can be made small, and even if the back surface of the substrate storage unit 41 is filled with urethane (foam insulation), the substrate storage unit 41 The foaming pressure applied to is small. However, if the operation menu increases and the substrate becomes larger, the substrate may be deformed by the foaming pressure of urethane. Therefore, when filling with urethane, it is necessary to apply a jig for preventing deformation of the substrate storage portion from the surface side of the side wall. In this manner, by providing the reinforcing portion 41s in the substrate housing portion 41, deformation due to foaming pressure can be suppressed. Note that the tip 41s1 of the reinforcing portion 41s only needs to extend to a position where it comes into contact with the jig.

  Further, since the reinforcing portion 41 s is formed in the substrate storage portion 41, a through hole 31 a through which the reinforcing portion 41 s can be inserted is formed in the center of the control substrate 31. Thereby, even if the reinforcing portion 41 s protrudes from the bottom surface portion 42 a to the surface that is flush with the side wall 12 a, the control substrate 31 can be stored in the substrate storage portion 41.

  FIG. 6 is a plan view of the state in which the control board is left from the operation panel and the board storage portion is removed as seen from the back side.

  As shown in FIG. 6, the control board 31 has a rectangular shape in plan view, and is disposed inside the rib 21 b formed on the back surface of the front surface member 21. The outer peripheral edge of the control board 31 is located in the vicinity of the rib 21b.

  In addition, the control board 31 is locked at the edge of the control board 31 by board claw portions 21 c, 21 c, 21 d, 21 d formed on the back surface of the front surface member 21. Thereby, the control board 31 is reliably held in the surface member 21.

  The board claw portions 21c and 21c are formed on the upper part of the control board 31, are formed integrally with the rib 21b, and are spaced apart from each other in the front-rear direction. The board claw portion 21c is formed on the wall surface of the rib 21b on the control board 31 side. The claw portions 21d and 21d are formed so as to protrude from the back surface of the front surface member 21, and are spaced apart from each other in the front-rear direction.

  The rib 21b includes an upper rib 21e formed along the upper side 31b of the control board 31, side ribs 21f and 21g formed along the side parts 31c and 31c on both front and rear sides of the control board 31, and a control. Lower ribs 21h and 21i formed along the lower side portion 31d of the substrate 31, and is configured in a substantially U shape (substantially C shape) in plan view. The lower ribs 21h and 21i are formed to be shorter from the lower ends of the side ribs 21f and 21g in the front-rear direction facing each other. Projection portions 21h1 and 21i1 extending in the thickness direction of the surface member 21 (the direction orthogonal to the paper surface of FIG. 6) are formed on the lower surfaces of the tips of the lower ribs 21h and 21i.

  On the back surface of the surface member 21, drainage grooves 21j, 21j, 21k, 21k extending in the vertical direction are formed at the lower end portion. The drain grooves 21j and 21j are located on the rear side in the front-rear direction. The drain grooves 21k and 21k are located on the front side in the front-rear direction. Further, the drain grooves 21j and 21k are configured by notching a bowl shape (substantially semicircular shape) on the back surface of the surface member 21. The drain grooves 21j and 21j are formed at positions that do not overlap the lower rib 21h in the vertical direction. The drain grooves 21k and 21k are formed at positions that do not overlap the lower rib 21i in the vertical direction.

  Further, the upper rib 21e has an inclined path 21e1 inclined so as to descend from the center in the front-rear direction (the center in the width direction when viewed from the front) toward the front (one in the width direction) and the rear (the other in the width direction). And an inclined path 21e2 that inclines so as to face downward.

  FIG. 13 is a perspective view of the substrate storage portion 41 as viewed from the front side (inside of the cabinet) with the surface member 21 and the control substrate 31 removed. As shown in FIG. 13, a plurality of gas vent holes 42h are formed in the vicinity of the center of the bottom surface portion 42a of the substrate storage portion 41 and around the reinforcing portion 41s. Thus, by forming the gas vent hole 42h for exhausting the gas generated at the time of urethane injection outside the chamber in the substrate storage portion 41, it is possible to prevent unfilled urethane on the back side of the substrate storage portion 41. Performance is improved. Here, as shown in FIG. 14, the gas vent holes 42 h are formed from the back side, so that no burrs are formed on the back side of the substrate storage portion 41, and the fluidity of urethane can be kept good. By providing such a vent hole 42h, for example, even when the gap between the substrate housing portion 41 and the vacuum heat insulating material 50 is a thin-walled heat insulation box with a thickness of less than 10 mm, the gap can be filled with urethane. It becomes possible.

  Further, as shown in FIG. 15, double-sided tape 45 with adhesive material applied to both the front and back surfaces is attached to the surface opening edge of the collar portion 43 of the substrate storage portion 41. However, since there is a region where the double-sided tape 45 cannot be provided in a part of the collar portion 43 away from the opening edge, when the button is pressed due to the thickness of the double-sided tape 45. The panel part 21a may sink. For this reason, the convex part 43s extended toward the surface member 21 (panel part 21a) is formed in the part of the collar part 43 where the double-sided tape 45 does not exist, thereby reducing the amount of sinking when the button is pressed, I can feel better. In addition, if the convex part 42s is formed in a part of the bottom face part 42a of the substrate storage part 41 and closer to the flange part 43 than the reinforcing part 41s and the gas vent hole 42h, the panel part 21a when the button is pressed. Can be further suppressed. In the present embodiment, the surface of the substrate housing portion 41 is fixed to the back surface of the side wall 12a using the double-sided tape 45, but may be fixed using an adhesive.

  Next, an attachment method for attaching the surface member 21 holding the control board 31 to the board storage portion 41 will be described. As shown in FIG. 6, a plurality of storage portion claws 21e and 21f, which are spaced apart from each other in the vertical direction, are integrally formed on the back surface of the front surface member 21 so as to protrude sideways. On the other hand, as shown in FIG. 13 and FIG. 16, a bag-like claw engaging portion that forms a space by being recessed from the inner end of the surface of the collar portion 43 toward the back side in the substrate storage portion 41. 43e and 43f are provided on the left and right. Since the claw engaging portions 43e and 43f and the storage portion claws 21e and 21f are in contact with each other, the substrate storage portion 41 and the surface member 21 can be directly fitted and securely fixed without using the side wall 12a. . At this time, the side wall 12 a is sandwiched between the panel portion 21 a (outer peripheral edge portion 21 r) located on the front side of the storage portion claws e and 21 f of the surface member 21 and the collar portion 43 of the substrate storage portion 41. The gap between the surface member 21 and the side wall 12a is closed.

  FIG. 7 is a longitudinal sectional view of the operation panel.

  As shown in FIG. 7, the upper rib 21 e has an inclined surface portion 21 e 3 that descends from the back surface side of the surface member 21 toward the front surface side. Thereby, even if water (condensation water) or the like flows into the upper rib 21e from the gap between the operation panel 20 and the side wall 12a, the control board 31 does not flow to the bottom surface part 42a side of the board storage part 41. Can be protected.

  By the way, since the inside of the refrigerator compartment 2 (inside of the refrigerator) is in a low temperature environment, there is a risk of condensation when warm air enters the refrigerator compartment 2 by opening and closing the doors 2a and 2b, and the control board 31 is protected from condensation (protection). There is a need to. Therefore, by making the shape of the rib 21e the shape described with reference to FIGS. 6 and 7, the control board 31 can be protected from dew condensation. That is, as shown by broken line arrows in FIG. 6, when dew condensation occurs in the chamber and the dew condensation water enters the back surface side of the surface member 21 from the upper part of the surface member 21, the dew condensation water is first received by the upper rib 21 e. be able to. At this time, since the upper rib 21e has the slopes 21e1 and 21e2, the dew condensation water flows in the front-rear direction (the left-right direction in the figure) by the slopes 21e1 and 21e2. At this time, since the upper rib 21e has the inclined surface portion 21e3 (see FIG. 7), the dew condensation water does not flow down to the control board 31 side.

  And the dew condensation water which flowed to the edge part of the front-back direction of the upper rib 21e flows down below, contacting the outer surface of the side ribs 21f and 21g by surface tension. The condensed water that has flowed to the lower ends of the side ribs 21f and 21g flows inward while contacting the lower surfaces of the lower ribs 21h and 21i with surface tension. The condensed water that has flown up to the tips of the lower ribs 21h and 21i hits the protrusions 21h1 and 21i1 formed on the lower surfaces of the tips of the lower ribs 21h and 21i, and flows down downward. The condensed water that has flowed down flows out of the surface member 21 through the drain grooves 21j, 21j, 21k, and 21k. In this way, the control substrate 31 can be protected from dew condensation by forming the flow path through which the dew condensation water flows.

  Next, the effect of the invention will be described with reference to the first embodiment and a comparative example. FIG. 8 is a schematic diagram showing the positional relationship between the operation panel and the heat insulating box, where (a) is the first embodiment and (b) is a comparative example.

  The comparative example shown in FIG. 8B is a case of the heat insulating box 100 in which the back surface 142c of the substrate storage portion 141 is formed following the inclined surface 12a1 and the surface 121a of the surface member 121 is formed following the inclined surface 12a1. It is. In the comparative example configured as described above, the gap S100 formed between the back surface 142c of the substrate storage unit 141 and the vacuum heat insulating material 50 (the front surface 50s) has a front side gap narrower than the back side gap. The fluidity of the foam heat insulating material in the gap on the front side is deteriorated. Further, the vacuum heat insulating material 50 is pressed by the substrate storage portion 41, and problems such as leakage of the vacuum heat insulating material 50 occur.

  Therefore, in the first embodiment, as shown in FIG. 8A, the back surface 42c of the substrate storage portion 41 and the vacuum heat insulating material 50 are made parallel (substantially parallel). That is, the protrusion (dimension) a1 on the front side is smaller (smaller) than the protrusion (dimension) b1 on the back side of the protrusion (projection amount) from the side wall 12a of the inner box 12 to the back side. Thereby, the clearance S between the back surface 42c of the substrate storage part 41 and the vacuum heat insulating material 50 (surface 50s) becomes uniform from the back side to the front side. As a result, the dimensions of the vacuum heat insulating material 50 and the back surface 42c (the back surface of the operation panel 20) of the substrate storage portion 41 can be shortened. Moreover, the thickness dimension of the vacuum heat insulating material 50 can be enlarged and the heat insulation of 1 A of refrigerators can be improved. Moreover, in 1st Embodiment, since the clearance gap between the board | substrate storage part 41 and the vacuum heat insulating material 50 can be made small, the wall thickness of 1 A of refrigerators can be made thin (the distance of the side plate 11a and the side wall 12a can be shortened). By reducing the wall thickness of the refrigerator 1A, the storage capacity of the refrigerator compartment 2 can be increased.

  Moreover, in 1st Embodiment, as shown to Fig.8 (a), the back surface 42c and the side plate 11a (outer box 11) of the board | substrate storage part 41 are made parallel (substantially parallel). Thereby, the same effect as the case where the back surface 42c of the board | substrate storage part 41 and the vacuum heat insulating material 50 are made parallel (substantially parallel) can be acquired.

  Further, in the comparative example of FIG. 8B, when the back surface 142c of the substrate storage portion 141 is oriented in the direction indicated by the alternate long and short dash line L100 and the back surface 142c and the vacuum heat insulating material 50 are made to be substantially parallel, the control substrate 31 is stored. Space cannot be secured.

  Therefore, in the first embodiment, as shown in FIG. 8A, the front surface member 21 is formed such that the front side protrudes from the side wall 12a (side surface) to the inside of the warehouse than the back side. That is, for the protrusion from the side wall 12a of the inner box 12 to the front side, the protrusion amount (dimension) a2 on the front side is larger (larger) than the protrusion amount (dimension) b2 on the rear side. Thereby, the storage space of the control board 31 can be ensured, and the back surface 42c of the board storage part 41 and the vacuum heat insulating material 50 can be configured to be substantially parallel (or substantially parallel). As a result, the dimensions of the vacuum heat insulating material 50 and the back surface 42c (the back surface of the operation panel 20) of the substrate storage unit 41 can be reduced. Moreover, the thickness dimension of the vacuum heat insulating material 50 can be enlarged and the heat insulation of 1 A of refrigerators can be improved. Moreover, in 1st Embodiment, since the clearance gap between the board | substrate storage part 41 and the vacuum heat insulating material 50 can be made small, the wall thickness of 1 A of refrigerators can be made small (the distance of the side plate 11a and the side wall 12a can be shortened). By reducing the wall thickness of the refrigerator 1A, the storage capacity of the refrigerator compartment 2 can be increased. It should be noted that a rib extending toward the vacuum heat insulating material 50 is not provided on the back surface 42c of the substrate housing portion 41. Thereby, it can prevent that the vacuum heat insulating material 50 leaks because a rib contacts the vacuum heat insulating material 50, and the distance of the vacuum heat insulating material 50 and the board | substrate storage part 41 is enlarged more than necessary for leak prevention. There is no need. This is particularly effective when the operation button 22 is not a touch type but a pressing type.

  Moreover, in 1st Embodiment, the recessed part 21t (refer FIG. 6) is formed in the back surface of the surface (front side) by which the surface member 21 protrudes (it is carved to the edge). Thereby, since the back surface edge part of the surface member 21 is formed in a collar shape by forming the recessed part 21t, the intensity | strength of the surface member 21 can be improved. Further, the space inside the operation panel 20 can be used effectively.

  Further, in the first embodiment, ribs (upper ribs 21e and side ribs 21f and 21g) extending downward from the upper side 31b of the control board 31 through the side side 31c protrude from the back surface of the front surface member 21. An upper surface of the upper rib 21e is formed and has an inclined surface portion 21e3 that descends from the rear surface side to the front surface side of the surface member 21 (see FIG. 7). Thereby, it is possible to prevent the condensed water from flowing into the control board 31, protect the control board 31, and improve the reliability of the operation panel 20.

  In the first embodiment, the upper surface of the upper rib 21e has inclined paths 21e1 and 21e2 that are inclined so as to descend from the center in the width direction toward both sides in a front view. Thereby, water (droplet) that has entered from above the operation panel 20 does not accumulate in the upper rib 21e, but can be guided to the side ribs 21f and 21g, and the control board 31 can be protected.

  In the first embodiment, drainage grooves 21j and 21k are formed on the lower surface in the vertical direction on the back surface of the front surface member 21. Thereby, even if water enters the substrate storage portion 41, the water can be drained from the drain grooves 21j and 21k, and the reliability of the operation panel can be improved.

  In the first embodiment, the rib 21b is not formed at a position overlapping the drain grooves 21j and 21k in the vertical direction. Thereby, water can be guide | induced to the drain grooves 21j and 21k with the rib 21b.

  In the first embodiment, the reinforcing portion 41 s extending from the bottom surface of the substrate storage portion 41 toward the surface member 21 is formed. Thereby, deformation | transformation of the board | substrate storage part 41 can be prevented when filling with a foam heat insulating material.

  By the way, the inclined surface 12a1 of the side wall 12a may be slightly R-shaped (so as to be convex toward the inner side). In such a case, as a countermeasure against the gap, it is preferable that the substrate storage portion 41 has an R shape as well. Therefore, in the second and third embodiments described below, it is unnecessary to give the substrate storage portions 61 and 81 an R shape by making the mounting portions of the storage portions 61 and 81 on the side wall 12a flat. become.

(Second Embodiment)
FIG. 9 is a schematic diagram illustrating a positional relationship between the operation panel and the heat insulating box according to the second embodiment.

  As shown in FIG. 9, the refrigerator 1B of 2nd Embodiment forms the recessed step part 12m in the inclined surface 12a1 of the side wall 12a. The stepped portion 12m includes a quadrangular cylindrical body 12m1 extending from the opening of the side wall 12a toward the side plate 11a, and an annular portion 12m2 extending inward from the tip of the cylindrical body 12m1. Yes. The annular portion 12m2 is formed substantially parallel to the vacuum heat insulating material 50. In other words, the annular portion 12m2 is formed substantially parallel to the side plate 11a. Further, the stepped portion 12m is obtained by making the amount of protrusion (dimension) on the front side smaller (smaller) than the amount of protrusion (dimension) on the rear side in the amount of protrusion on the rear surface side of the side wall 12a.

  The front surface member 51 has a rib 52 protruding toward the back surface, and the tip of the rib 52 is in contact with the surface of the collar portion 12m2.

  The substrate storage unit 61 includes a recess 62 that stores the control substrate 31, and a flange 63 formed at the opening edge of the recess 62. The recess 62 has a back surface 62 c formed substantially parallel to the vacuum heat insulating material 50. The collar part 63 is in contact with the annular part 12m2.

  In the second embodiment, since the back surface 62c of the substrate storage unit 61 and the vacuum heat insulating material 50 can be made substantially parallel, the gap S1 between the back surface 62c and the vacuum heat insulating material 50 can be made uniform. Moreover, in the surface member 51 of 2nd Embodiment, the front side protrudes inward from the inclined surface 12a1 of the side wall 12a rather than the back side. Thereby, the clearance gap between the vacuum heat insulating material 50 and the back surface 62c (back surface of the operation panel 20) of the board | substrate storage part 61 can be made small. Thus, by making a clearance gap small, the thickness dimension of the vacuum heat insulating material 50 can be enlarged, and the heat insulation of 1 A of refrigerators can be improved. Moreover, in 2nd Embodiment, since the clearance gap between the board | substrate storage part 61 and the vacuum heat insulating material 50 can be made small, the wall thickness of 1 A of refrigerators can be made small (the distance of the side plate 11a and the side wall 12a can be shortened). By reducing the wall thickness of the refrigerator 1A, the storage capacity of the refrigerator compartment 2 can be increased.

(Third embodiment)
FIG. 10 is a schematic diagram illustrating a positional relationship between the operation panel and the heat insulating box according to the third embodiment.

  As shown in FIG. 10, the refrigerator 1C of 3rd Embodiment forms the convex-shaped level | step-difference part 12p in the inclined surface 12a1 of the side wall 12a. The stepped portion 12p has a quadrangular cylindrical body 12p1 extending from the opening of the side wall 12a toward the interior, and an annular portion 12p2 extending inward from the tip of the cylindrical body 12p1. . The annular portion 12p2 is formed substantially parallel to the vacuum heat insulating material 50. In other words, the annular portion 12p2 is formed substantially parallel to the side plate 11a. Further, the stepped portion 12p has a protruding amount (dimension) on the front side larger (larger) than a protruding amount (dimension) on the rear side in the protruding amount on the front surface side of the side wall 12a.

  The surface member 71 has a rib 72 protruding toward the back surface, and the tip of the rib 72 is in contact with the surface of the annular portion 12p2.

  The substrate storage portion 81 includes a recess 82 for storing the control substrate 31 and a flange portion 83 formed at the opening edge of the recess 82. The recess 82 has a back surface 82 c formed substantially parallel to the vacuum heat insulating material 50. The collar portion 83 is in contact with the annular portion 12p2.

  In 3rd Embodiment, since the back surface 82c of the board | substrate storage part 81 and the vacuum heat insulating material 50 can be made substantially parallel, the clearance gap S2 between the back surface 82c and the vacuum heat insulating material 50 can be made uniform. Moreover, in 2nd Embodiment, the surface member 71 is formed so that the front side may protrude from the side wall 12a to the inner side rather than the back side. Thereby, the effect similar to 2nd Embodiment can be acquired.

  In the second embodiment, the side wall 12a has a concave shape. In the third embodiment, the side wall 12a has a convex shape. However, the side wall 12a is simply attached without being concave or convex. The structure which makes a location a plane may be sufficient.

  By the way, when the gap between the substrate storage portion 41 (hereinafter referred to as a case) and the outer plate (side plate 11a) is reduced, the urethane (in the gap between the case and the vacuum heat insulating material 50) around the gap ( Although a foam insulation material is contained, it is assumed that urethane does not enter near the center. Further, the multi-function operation panel 20 increases the size of the control board 31, and the case for storing the control board 31 also increases in size, and is easily affected by the foaming pressure during urethane filling. The relationship between the foaming pressure and the urethane density is as shown in FIG. That is, if the gap is reduced, the urethane density increases, so that the foaming pressure increases as the urethane density increases. This causes problems such as damage and deformation of parts such as the case. Therefore, in order to avoid such problems, the urethane density (ρ) satisfies the following relational expression 1 and is a refrigerator using urethane having a density satisfying this expression.

Ln (ρ) ≦ 1066.7 × K / A-17.48 (Equation 1)
ρ: Urethane density (kg / mm ³ )
K: Case rigidity (N / mm)
A: Installation area (mm ² ) of urethane and case that entered the back of the case
As shown in FIG. 11 (b), the case rigidity K is obtained by applying a load F to the outer periphery of the case and the protrusions inside the case, and applying (load F: N) / (deformation amount). R: mm).

In a structure like this embodiment, a heat insulation part becomes thin with a case, and the thickness of urethane tends to decrease and the urethane density tends to increase. Therefore, in this embodiment, it is assumed that the urethane density is 45 kg / m ³ or more.

Next, the basis of Expression 1 will be described. From the relationship between density (ρ: kg / mm ³ ) and foaming pressure (P: MPa), the deformation amount due to foaming can be expressed by the left side of the following (Formula 2). And the relationship between the urethane density and the foaming pressure shows a tendency as shown in FIG. Further, in order to prevent damage to parts such as a case from the urethane foam pressure, it is necessary to satisfy the relationship of (Formula 2).

[Foaming pressure] x [Area] / [Case rigidity] ≤ [Allowable value] (Equation 2)
Assuming that the gap between the case and the vacuum heat insulating material is about 1.0 mm, the urethane density is generally about 500 × 10 9 kg / mm ³ . The foaming pressure (MPa) in this case was calculated from the relational expression obtained in FIG. 11A, the case rigidity K was determined by CAE analysis, and an allowable value corresponding to the right side of (Expression 2) was determined. In addition, it is assumed that the size will be doubled due to future multifunctional operation panels, and the case rigidity K is expected to be 1/4 due to material changes, etc., and the allowable value is required about 8 times. I think. Therefore, the safety factor is 8.

  The relational expression obtained in FIG. 11A described above, (Expression 2), and the allowable value considering the safety factor, leads to (Expression 1), and the conditional expression of the urethane density with respect to damage and deformation of the case It becomes.

  When the wall thickness of the heat insulation box 10 is reduced, the gap between the case and the vacuum heat insulating material is inevitably narrowed. For example, when the gap is less than 10 mm, since the urethane density is high, the foaming pressure becomes high and the deformation becomes easy. Therefore, a refrigerator is provided in which urethane (foaming heat insulating material) does not intervene at least near the center between the case (substrate housing portion 41) for storing the substrate (control board 31) and the outer plate (or vacuum heat insulating material 50). By doing so, deformation due to foaming pressure can be suppressed, and the space necessary for providing a margin can be saved.

  In addition, as shown in FIG. 12, an interposition member 90 may be provided between the case (substrate housing portion 41) and the vacuum heat insulating material 50. The interposition member 90 is a member that suppresses or prevents the intrusion of the foam heat insulating material, and a sponge-like material such as soft urethane, or polystyrene foam can be applied. Further, if the distance between the case and the vacuum heat insulating material 50 is set narrowly to 6 mm or less, it becomes difficult for the foam heat insulating material to enter between the case and the vacuum heat insulating material 50.

  Moreover, since the case and the vacuum heat insulating material 50 do not contact directly by providing the interposition member 90, the leak of the vacuum heat insulating material 50 can be prevented. In addition, the interposition member 90 may be a compressible member that closes a gap between the case and the vacuum heat insulating material 50 (a member larger than the original size of the gap is crushed and interposed). In addition, as a compressible member, a polystyrene foam and a polyethylene foam are applicable. Further, the interposition member 90 is preferably one that does not soak the foam heat insulating material.

  In addition, this invention is not limited to above-described embodiment, Various modifications are included. For example, in the present embodiment, the case where the operation panel 20 is provided on the inclined surface 12a1 of the side wall 12a in the warehouse has been described. However, the operation panel 20 may be applied to the top wall 12d in which the interior lamp is provided. Or you may apply to the place where the main board | substrate of the upper surface of a refrigerator is mounted. Or you may apply to the place which mounts the board | substrate of IOT (Internet of Things).

1A, 1B, 1C Refrigerator 10 Heat insulation box 11 Outer box 12 Inner box 12a Side wall (side face)
12a1 Inclined surface 12m, 12p Stepped portion 20 Operation panel (unit member)
21 surface member 21b rib 21e upper rib 21e1, 21e2 ramp 21e3 inclined surface portion 21f, 21g side rib 21h, 21i lower rib 21j, 21k drainage groove 21t recess 31 control substrate (circuit board)
31b Upper side portion 31c Side side portion 31d Lower side portion 41 Substrate storage portion 41s Reinforcing portion 41s1 Tip 42a Bottom portion 42c Back side (surface on the side facing the outer box)
42h Gas vent hole 43 Collar portion 43e, 43f Claw engaging portion 43s Convex portion 45 Double-sided tape 50 Vacuum heat insulating material

Claims (5)

A unit member having a front surface member, a circuit board provided on the back surface side of the front surface member, and a substrate storage portion for storing the circuit board and fixing the front surface member;
A vacuum heat insulating material provided between the inner box and the outer box;
In a refrigerator comprising a foam heat insulating material filled between a bottom surface of the substrate storage unit and the vacuum heat insulating material,
A refrigerator in which a vent hole is formed in a bottom surface of the substrate storage unit.   The refrigerator according to claim 1, wherein the gas vent hole is formed from a back side of the substrate storage unit. A reinforcing portion extending toward the surface member is formed on the bottom surface of the substrate storage portion,
The refrigerator according to claim 1, wherein the vent hole is formed around the reinforcing portion. Double-sided tape is attached to the opening edge of the collar portion of the substrate storage portion,
The refrigerator according to any one of claims 1 to 3, wherein a convex portion extending toward the surface member is formed inside the opening edge.   The front surface member and the substrate storage portion are directly fitted by abutment between the storage portion claw provided on the surface member and a claw engagement portion provided on the substrate storage portion. The refrigerator according to any one of claims 1 to 3.

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