JP3978041B2 - Cooling storage - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling storage, and more particularly to an improvement in the structure of a mounting portion of a unit table on which a refrigeration unit is placed.
[0002]
[Prior art]
The following are known as an example of a conventional commercial refrigerator. As for this thing, an opening is formed in the ceiling wall of the refrigerator body, and a heat insulating unit base on which a refrigeration unit composed of a compressor, a condenser and the like is placed is installed so as to close the opening, A cooler chamber containing a cooler is formed below the unit base, and the cooler and the refrigeration unit are connected in a circulating manner by refrigerant piping. By driving the refrigeration unit and the cooling fan, the vicinity of the cooler The cool air generated in the above is circulated and supplied to the interior to cool the interior.
Such a refrigerator is disclosed, for example, in JP-A-63-46363.
[0003]
[Problems to be solved by the invention]
By the way, in this kind of refrigerator, in order to maintain the cooling capacity, the defrosting operation is appropriately performed, the frost adhering to the cooler is melted by a heater or the like, and the defrost water is received by the drain pan and discharged. It has become.
On the other hand, not a little frost or condensed water adheres to the lower surface of the unit base that constitutes the ceiling of the cooler room, and the frost is melted during the above defrosting operation. Even if it becomes water droplets, there is a possibility that it cannot be dropped and remains. Then, when the cooling operation is resumed, icing occurs, and if this is repeated, the icicle gradually grows, and there is a possibility of causing a situation of interfering with the motor or the like of the cooling fan. In addition, once the icicle grows, it takes a lot of time and effort to completely remove it.
The present invention has been completed based on the above situation, and an object of the present invention is to enable the water adhering to the lower surface of the unit base to be discharged smoothly.
[0004]
[Means for Solving the Problems]
Cooling storage of the invention 請 Motomeko 1, an opening is formed in the ceiling wall of the storage body, this opening so as to close the unit carriage mounted with the refrigeration unit is mounted, below the unit base cooler is formed by a condenser chamber accommodating Rutotomoni, there is the packing between the rim of said unit base and said opening is interposed, said unit base of the lower surface is, the central portion In order to receive defrosted water from the cooler or the like , and a downward projecting portion that covers the inside of the packing is formed on the periphery of the packing. A drain pan provided in the cooler chamber is characterized in that it is disposed below the downward projecting portion of the unit base.
[0005]
[Action and effect of the invention]
<Invention of Claim 1>
Moisture such as dew condensation water and defrost water adhering to the lower surface of the unit table flows down to the periphery following the inclination of the lower surface, and is dropped and discharged onto the drain pan from the downward projection . Since no moisture remains on the lower surface of the unit table, it is possible to prevent freezing and icicles from being generated there. As a result, it is possible to prevent the ice column from interfering with a member such as a motor arranged in the cooler chamber, and it is also possible to avoid performing a defrosting operation longer than necessary .
Its Re was added, during cooling operation, cool air that directly strikes the packing is prevented by the projection. For this reason, a decrease in heat insulation performance due to the deterioration of the packing is prevented, and condensation on the outer surface side of the packing is also prevented.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, a commercial refrigerator is illustrated.
In FIG. 1 thru | or FIG. 3, the code | symbol 10 is the refrigerator main body which consists of a heat insulation box, Comprising: The machine room 12 is comprised by standing the flame | frame 11 in the four corners on the upper surface.
A rectangular opening 14 is formed at the center of the ceiling wall 13 of the refrigerator body 10, and a unit table 20 on which a refrigeration unit 50, which will be described later, is placed is installed so as to close the upper surface of the opening 14. ing. On the other hand, a drain pan 16 that also serves as a cooling duct is stretched downwardly from the position of the lower lip on the front side of the opening 14 (left side in FIG. 2) toward the back wall, and the unit base 20 A cooler chamber 17 is formed between the two.
[0007]
The unit base 20 is heat-insulating, and roughly includes an exterior plate 21, an interior plate 22, and a heat insulating material 23 filled between both plates 21 and 22.
The exterior plate 21 is made of a metal plate, and as shown in FIGS. 4 and 5, the exterior plate 21 is formed in a shape like a rectangular shallow box that is slightly larger than the opening portion 14. In addition, the mounting recess 25 such as the compressor 51 and the condenser 52, the refrigerant pipe 56, and the lead hole insertion holes 26 and 27 are formed, and the mounting plate 28 is outward from the lower edges of the left and right side plates 44. Overhang is formed.
[0008]
The interior plate 22 is integrally formed of a synthetic resin material, and is formed in a square shallow dish shape having a flange 30 on the periphery as a whole, so that the lower surface of the exterior plate 21 is formed to constitute the lower surface of the unit base 20. It is possible to fit closely into the opening.
The bottom plate 31 of the interior plate 22 is formed in an inclined shape. Specifically, as shown in FIGS. 5 and 6, it is formed in a cross-sectional mountain shape having a gentle downward slope on both front and rear sides, with the apex 32 being a position slightly ahead of the center in the front-rear direction. In the rear inclined surface 33A, a ridge portion 34C is once climbed, and on the rear side, a downward protruding ridge portion 34A having a steep cross-sectional mountain shape is formed over the entire width. On the other hand, in the front inclined surface 33B, the skirt portion is formed horizontally, and on the front side, a downward projecting ridge 34B having a steep cross-sectional mountain shape is also formed over the entire width.
Both projecting portions 34A and 34B have projecting ends projecting downward from the peripheral edge of the bottom plate 31, and when the unit base 20 is installed on the upper surface of the opening 14 as will be described later, both projecting portions 34A. , 34B are fitted inside the front and rear edges of the opening 14.
[0009]
A spacer 35 is appropriately set up from the flange 30 and the bottom plate 31 of the interior plate 22, and when the interior plate 22 is fitted into the opening on the lower surface of the exterior plate 21, the protruding end of the spacer 35 is the exterior plate 21. A predetermined space is secured between both plates 21 and 22 by abutting against the upper surface of the plate.
Refrigerant piping 56 and lead tube insertion pipes 36 and 37 project from the upper surface of the bottom plate 31 of the inner plate 22, and when the inner plate 22 is fitted in the normal position as described above, the refrigerant in the outer plate 21. The piping 56 and the lead wire insertion holes 26 and 27 are aligned. Further, nuts 39 for mounting the cooler 55 are embedded in the left and right side edges of the inclined surface 33A on the rear side of the bottom plate 31 by insert molding.
[0010]
A packing 40 is attached to the outer periphery on the bottom side of the interior plate 22. Specifically, the packing 40 is composed of four straight packings 40, and is arranged in a rectangular ring shape as a whole while abutting the ends cut at 45 degrees. Further, the packing 40 has a substantially L-shaped cross section, and a vertical portion 41 is sandwiched between the side plate 44 of the exterior plate 21 and the side plate 45 of the interior plate 22, while the lateral portion 42 is disposed inside the interior plate 22. The plate 22 is sandwiched between the peripheral edge of the bottom plate 31 and the upper edge of the opening 14.
[0011]
When the unit base 20 is formed, the interior plate 22 is fitted into the opening on the lower surface of the exterior plate 21 until the spacer 35 abuts, and the packing 40 is interposed between the side plate 44 of the exterior plate 21 and the side plate 45 of the interior plate 22. Is installed, and the space between both plates 21 and 22 is sealed. Then, a heat insulating material 23 made of urethane foam resin is poured into a space formed between both plates 21 and 22 from an inlet (not shown) opened in the side plate 44 of the exterior plate 21 and foamed. Filled. As a result, the unit base 20 is completed, and the insertion hole 26 and the insertion cylinder 36 for the refrigerant pipe 56 and the insertion hole 27 for the lead wire and the insertion cylinder 37 are aligned.
[0012]
The refrigeration unit 50 is mounted on the upper surface of the unit table 20. For example, the compressor 51 is located at a substantially central portion on the back side, the condenser 52 is located at the front end position on the left side as viewed from the front, and the condenser fan 53 is located behind the condenser 52. Is attached. Thus, the unit base 20 on which the refrigeration unit 50 is placed is placed on the upper surface so as to close the opening 14 in a predetermined orientation, and the mounting plate 28 provided on the exterior plate 21 is attached to the opening 14. It is fixed by screwing it against the upper lip.
At this time, as shown in FIGS. 7 and 8, the lateral portion 42 of the packing 40 is elastically stretched between the peripheral edge of the bottom plate 31 of the interior plate 22 and the upper edge of the opening 14, Between the unit base 20 and the drain pan 16 described above, a cooler chamber 17 that is insulated from outside air is configured. Further, along with the mounting of the unit base 20, the front and rear ridges 34 A and 34 B provided on the interior plate 22 fit into the opening 14, and both the ridges 34 A and 34 B are located above the drain pan 16. The position is within the receiving range of the drain pan 16.
[0013]
On the other hand, a cooler 55 is attached to the rear inclined surface 33 </ b> A of the bottom plate 31 of the interior plate 22 of the unit base 20 using a mounting nut 39. Accordingly, as the unit table 20 is installed as described above, the cooler 55 is accommodated in the cooler chamber 17 in a state of being slightly lifted from the drain pan 16 as shown in FIG. It has come to be.
The cooler 55 and the refrigeration unit 50 on the unit table 20 are circulated and connected by a refrigerant pipe 56 that passes through the insertion tube 36 and the insertion hole 26 to constitute a known refrigeration cycle.
[0014]
A suction part 59 having a plurality of through holes 58 is provided on the upper side of the drain pan 16, and a cooling fan 60 driven by a motor 61 is provided in the suction part 59. The lead wire of the motor 61 is drawn out to the machine chamber 12 side through the insertion tube 37 and the insertion hole 27.
In addition, on the lower side of the drain pan 16, a discharge port 63 is formed by cutting out the upper end portion of the side plate, and a drain pipe 65 is protruded so as to face a drain channel 66 formed in the back wall. Yes.
[0015]
This embodiment has the structure as described above, and the operation thereof will be described subsequently.
When the compressor 51 and the cooling fan 60 are driven during the cooling operation, the air in the refrigerating chamber 10A is sucked into the cooler chamber 17 and passes through the cooler 55 as shown by the arrow in FIG. During this time, heat is exchanged to generate cold air, and this cold air is circulated in such a manner that it is blown out from the discharge port 63 into the refrigerator compartment 10A as indicated by the arrow in FIG. Is cooled.
[0016]
At this time, particularly in the rear of the cooler 55, low-temperature cold air immediately after the heat exchange was blown out, and a part thereof was interposed between the unit base 20 and the upper edge of the opening 14. As shown in FIG. 8, the inner side of the packing 40 is blocked by the rear protrusion 34 </ b> A protruding from the interior plate 22 of the unit base 20, so that the cold air is sealed in the packing 40. A direct hit is avoided. Therefore, a decrease in heat insulation performance due to deterioration of the packing 40 is prevented, and condensation on the outer surface of the vertical portion 41 of the packing 40 and further on the outer surface of the side plate 44 of the exterior plate 21 is prevented. .
Further, since the inner side of the front packing 40 is also blocked by the front protrusion 34B, it is difficult for direct contact with cold air (the sucked air in the cabinet).
[0017]
The defrosting operation is performed by heating with a heater (not shown) provided in the cooler 55. During the defrosting operation, frost adhering mainly to the cooler 55 is melted, defrosted water is received by the drain pan 16 and discharged from the drainage channel 66 to the outside of the machine.
On the other hand, not a little frost adheres to the interior plate 22 of the unit base 20 constituting the ceiling of the cooler chamber 17, and this frost is also melted during the defrosting operation, but the bottom plate 31 of the interior plate 22. Is formed in a mountain shape, the defrosted water flows down the front and rear sides along the inclined surfaces 33A and 33B, and as shown in FIG. It is dripped on and discharged from the drain 66 in the same manner.
Even when the interior plate 22 is dewed during the cooling operation or the like, the dew condensation water flows down to the front and rear sides along the inclined surfaces 33A and 33B of the bottom plate 31 of the interior plate 22, and from the protrusions 34A and 34B. It is dropped on the drain pan 16 and discharged.
[0018]
As described above, according to the present embodiment, moisture such as condensed water and defrost water adhering to the interior plate 22 which is the lower surface of the unit base 20 flows down following the inclination of the bottom plate 31, and the protruding portion 34 </ b> A. , 34B is dropped onto the drain pan 16 and discharged. In other words, no moisture remains on the lower surface of the unit base 20, so that icing and generation of ice columns are prevented. As a result, it is possible to prevent the ice column from interfering with members such as the motor 61 of the cooling fan 60 disposed in the cooler chamber 17. In addition, it is possible to avoid performing a defrosting operation longer than necessary to remove the icicles, minimizing adverse effects on food stored in the refrigerator compartment 10A, and reducing power consumption.
[0019]
In addition, during the cooling operation, the protrusions 34A and 34B prevent the cold air from directly hitting the packing 40, so that the heat insulation performance can be prevented from being lowered due to the deterioration of the packing 40. Condensation on the outer surface is also prevented.
The provision of the protrusions 34A and 34B is effective for reinforcing the interior plate 22, and the protrusions 34A and 34B are used as positioning when the unit base 20 is installed on the upper surface of the opening 14. Therefore, the installation work can be performed efficiently.
[0020]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) The drain pan may be provided separately from the cold air duct that partitions the cooler chamber from the refrigerator compartment.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a machine room according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the vicinity of the machine room. FIG. 3 is an exploded longitudinal sectional view of the unit room. [Fig. 4] Expanded exploded sectional view cut along line XX in Fig. 4 [Fig. 6] Perspective view of the interior plate [Fig. 7] Expanded sectional view on the inlet side of the cooler chamber [Fig. Sectional view [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Refrigerator main body 13 ... Ceiling wall 14 ... Opening part 16 ... Drain pan 17 ... Cooler room 20 ... Unit stand 21 ... Exterior board 22 ... Interior board 23 ... Heat insulating material 31 ... Bottom board 32 ... Vertex 33A, 33B ... Inclined surface 34A, 34B ... Projection (lowest part) 40 ... Packing 50 ... Refrigeration unit 55 ... Cooler 56 ... Refrigerant piping

Claims (1)

An opening is formed in the ceiling wall of the storage body, and a unit base on which the refrigeration unit is placed is installed so as to close the opening, and a cooler chamber in which a cooler is housed is formed below the unit base. is Rutotomoni packing between the rim of said unit base and said opening is a one that is interposed,
The lower surface of the unit base is formed in an inclined shape with a downward slope from the center side toward the periphery, and a downward projecting portion is formed on the periphery to cover the inside of the packing, and the cooler A cooling storage, wherein a drain pan provided in the cooler chamber to receive defrosted water or the like from, etc. is disposed below the downward projecting portion of the unit base.

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