JP4267978B2 - Storage drainage structure - Google Patents

Description

  The present invention relates to a drainage structure of a storage, and more specifically, a drain pipe in which defrost water dripped from a cooler disposed in a heat insulation box is connected to a water collecting duct disposed below the cooler. It is related with the drainage structure of the store | warehouse | chamber which was made to discharge to the drain outlet opened to the heat insulation box.

  For storing items such as vegetables, fruits and other meat and fish refrigerated or frozen, a storage room for storing items is defined in the heat insulation box, and the cool air cooled by a cooler is circulated in the storage chamber to store the items. Storages configured to cool a room directly are known. An example of this storage is shown in FIG. The illustrated storage 10 is assembled with an outer box 12 having a rectangular opening that is spaced apart from the upper and lower sides by a predetermined distance and opened to the front side, and with a required gap in the outer box 12. It has a heat insulating box 18 composed of an inner box 14 that is largely opened and a heat insulating material 16 such as urethane foam filled between the two boxes 12 and 14. A storage chamber 20 for storing articles is defined inside the heat insulating box 18. In addition, on the front surface of the heat insulating box 18, a heat insulating door 22 that closes the opening 18 a so as to be openable and closable is disposed corresponding to each opening 18 a opened in the heat insulating box 18. Further, a machine room 24 in which a cooling device 26 including a compressor 28, a condenser 30, a condenser fan 32 and the like is disposed is defined above the heat insulating box 18.

  A cooling duct 34 is disposed above the inside of the heat insulating box 18 (between the storage chamber 20 and the machine room 24) at a lower position away from the ceiling surface of the inner box 14, and above the cooling duct 34. A cooling chamber 36 is defined. The cooling chamber 36 communicates with the storage chamber 20 through a suction port 38 formed on the front side at the bottom of the cooling duct 34 and a blowout port (cold air blowing gap) 40 formed on the rear side, and is connected to the cooling device 26. A cooler 42 connected via a refrigerant pipe (not shown) is accommodated in the cooling chamber 36. The cooler 42 is provided with an evaporation pipe (not shown) therein, and the refrigerant supplied from the cooling device 26 circulates through the evaporation pipe. The suction port 38 is provided with a blower fan 44 facing the inside. When the blower fan 44 rotates, the air in the storage chamber 20 sucked into the cooling chamber 36 through the suction port 38 is blown to the cooler 42 and contacts the cooler 42 to exchange heat. The air thus formed becomes cool air and is blown out from the cooling chamber 36 to the storage chamber 20 through the outlet 40. Further, the cold air is configured to circulate in the storage chamber 20 and repeat the cycle of returning to the cooling chamber 36 again.

  As shown in FIG. 5, below the cooler 42, a water tray (a water collecting duct) 46 that receives defrosted water or the like dripping from the cooler 42 is disposed. A drain pipe 48 is connected to the rear side. In addition, a drain outlet 52 of a drain pipe 50 provided in the rear wall of the heat insulation box 18 opens on the inner wall surface 18b side of the heat insulation box 18 facing the cooling chamber 36, and the water Defrosted water or the like received in the tray 46 is configured to be discharged to the drain port 52 through the drain pipe 48 (see, for example, Patent Document 1).

In Patent Document 1, since the drain pipe 48 is configured to be inserted into the drain port 52 established in the inner wall surface 18b of the heat insulating box 18, the inner surface of the drain port 52 and the drain pipe are arranged. A gap is formed between the outer surface of 48. Therefore, when the inside of the storage chamber 20 becomes negative pressure due to the opening / closing of the heat insulating door 22 or the contraction / expansion of the air in the storage chamber 20, warm outside air enters the cooling chamber 36 from the gap through the clearance, Condensation and icicle ice may occur near the drain 52. Therefore, a drainage structure in which the elastic packing 54 inserted into the tip of the drainage pipe 48 is brought into close contact with the inner wall surface 18b of the heat insulating box 18 to close the gap between the drainage pipe 48 and the drainage port 52. It has been proposed (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 11-108531 JP 2001-330363 A

  In the water tray 46, the upper end of the rear wall portion 46a to which the drain pipe 48 is connected extends upward from the connection portion of the drain pipe 48, and the water tray 46 has a wall portion 46a. The defrosted water can be stored up to the upper edge of. However, when the drain pipe 48 is clogged due to foreign matter or icing, the defrost water that has climbed over the wall 46a is dripped into the storage chamber 20 through the outlet 40 of the cooling duct 34, It is pointed out that the value of merchandise may be damaged by wetting the stored items.

  Further, the packing 54 attached to the tip of the drain pipe 48 and closing the gap between the drain pipe 48 and the drain port 52 is not fixed by fixing means such as a screw, but the elastic packing 54 itself. It is attached using the nature of. Therefore, when the cooling duct 34 is attached, the packing 54 may be touched and the position of the packing 54 may be displaced, and the gap may not be effectively blocked. In addition, since the said drain pipe 48 is arrange | positioned toward the back side (back side) of the said heat insulation box 18, it is difficult to confirm the shift | offset | difference of the packing 54. FIG.

In order to overcome the above-mentioned problems and achieve the intended purpose, the drainage structure of the storage according to the present invention includes a heat insulation box in which an article storage chamber and a cooling chamber including a cooler are provided. A water collecting duct disposed below the cooling chamber and receiving defrost water dripping from the cooler, and defining a cold air blowing gap between the inner wall surface of the heat insulating box, and In the storage consisting of a drain pipe connected to the water collecting duct and connected to a drain outlet that opens to the inner wall surface across the cold air blowing interval,
An overflow receiving means that surrounds the lower and side of the drain pipe facing the cold air blowing gap is disposed in the water collecting duct,
An end of the overflow receiving means is brought into contact with the inner wall surface ;
A packing which is extrapolated to the drain pipe and closes a gap between the drain pipe and the drain port is configured to be sandwiched between the overflow receiving means and the inner wall surface of the heat insulating box .

  According to the drainage structure of the storage according to the present invention, the overflow receiving means that surrounds the lower side and the side of the drain pipe connected to the water collecting duct is extended to the inner wall surface of the heat insulating box, and the end portion is brought into contact therewith. Since the defrost water is discharged through the inner wall surface of the heat insulating box even if the drain pipe is blocked, the article in the storage room stored below is prevented from getting wet. be able to.

  In addition, since the packing that closes the gap between the drain pipe and the drain outlet is configured to be sandwiched between the overflow receiving means and the inner wall surface of the heat insulating box, the packing is fixed to prevent intrusion of external air Condensation and icicle ice do not occur.

  In view of the above problems inherent in the drainage structure of the storage according to the prior art, the present invention has been proposed to suitably solve these problems, and prevents the articles stored under the cooling chamber from getting wet. It aims at providing the drainage structure of the storage. In the present invention, the end of the overflow receiving means that surrounds the lower side and the side of the drain pipe connected to the water collecting duct is brought into contact with the inner wall surface of the heat insulation box, so that the inside of the heat insulation box is closed when the drain pipe is closed. The defrost water was drained through the wall surface.

  Next, the drainage structure of the storage according to the present invention will be described below with reference to the accompanying drawings by giving a preferred embodiment. For convenience of explanation, the same components as those of the storage shown in FIG. 4 or FIG.

  As shown in FIG. 1, the storage box stores articles such as foods and beverages inside a heat insulating box 18 as a main body formed by foaming and filling a heat insulating material 16 such as urethane between the outer box 12 and the inner box 14. A storage room 20 for storage is defined. In the heat insulating box 18, an opening 18 a that opens to the front surface side and serves as an outlet for goods is opened to communicate with the storage chamber 20. In addition, the heat insulating box 22 is provided with a heat insulating door 22 on one end edge of the heat insulating box 18 via a hinge member disposed above and below the heat insulating box 18 so that the opening 18a can be closed. It is arranged to be movable.

  A machine room 24 is defined above the heat insulating box 18, and a cooling device 26 including a compressor 28, a condenser 30, a condenser fan 32, and the like is accommodated in the machine room 24. A cooling chamber 36 in which a cooler 42 in which refrigerant is circulated and supplied from the cooling device 26 and a blower fan 44 are housed are a cooling duct (water collecting duct) 60 disposed in the upper part of the housing chamber 20 and the heat insulating box. It is defined between the ceiling surface of the body 18 (inner box 14). The cooling duct 60 is formed with a suction port 38 that allows the storage chamber 20 and the cooling chamber 36 to communicate with each other. Then, by rotating the blower fan 44, the air in the storage chamber 20 sucked into the cooling chamber 36 from the suction port 38 is forcibly brought into contact with the cooler 36 to form cool air, and then a blower described later. The storage chamber 20 is cooled by being blown out to the storage chamber 20 through the outlet (cold air blowing gap) 40.

  As shown in FIG. 1 or 2, the cooling duct 60 has a required depth from a bottom plate 62 formed in a substantially rectangular shape and a side plate 64 extending upward from the outer peripheral edge of the bottom plate 62. It is formed in a tray shape. The bottom plate 62 is inclined downward from the front side to the rear side of the storage chamber 20, and a drain pipe 48 is connected to the inclined lower end portion thereof. Further, an opening that is substantially aligned with the outer peripheral edge of the blade 44a of the blower fan 44 is formed at the inclined upper end portion of the bottom plate 62, and the blade 44a of the blower fan 44 faces the opening, and the storage chamber 20 and the cooling chamber 36 function as a suction port 38 that communicates with the cooling chamber 36. The suction port 38 is covered with a fan cover 58 from the storage chamber 20 side to protect the user from coming into contact with the blades 44a of the blower fan 44. A flange portion 64a bent outward is formed at the upper end of the side plate 64. The flange portion 64a is brought into contact with the ceiling surface of the heat insulating box 18 and fixed by a predetermined means such as a screw. Has been. Further, the side plate 64b on the inclined lower end portion side of the cooling duct 60 is formed lower than the other side plate 64, and cool air is opened from an opening formed between the upper end edge of the side plate 64b and the ceiling surface of the heat insulating box 18. And a gap defined between the inclined lower end portion of the cooling duct 60 and the inner wall surface 18b of the heat insulating box 18 functions as the air outlet 40. The cooler 42 communicated with the cooling device 26 via the refrigerant pipe 27 is disposed between the blower fan 44 and the drain pipe 48.

  The drain pipe 48 connected to the inclined lower end portion of the cooling duct 60 crosses the outlet 40 formed between the inclined lower end portion of the cooling duct 60 and the inner wall surface 18b of the heat insulating box 18, An open end on the discharge side is inserted into a later-described drain port 52 opened on the inner wall surface 18b on the rear side (back side) in the body 18, and an open end on the inflow side is inward of the cooling duct 60. (See Fig. 3). An overflow receiving means 65 that faces the outlet 40 and surrounds the lower and side of the drain pipe 48 is extended from the inclined lower end of the cooling water duct 60, and the end of the overflow receiving means 65 is The heat insulating box 18 is in contact with the inner wall surface 18b. Specifically, the overflow receiving means 65 includes a receiving portion 66 and weir portions 68, 68. The receiving portion 66 extends along the bottom portion of the drain pipe 48 at the inclined lower end portion of the bottom plate 62. Is formed. Further, on both sides of the drainage pipe 48, a side plate 64b at the lower end of the cooling duct 60 is connected to the side plate 64b, and a weir 68 is provided on both sides of the receiving part 66 along the drainage pipe 48. , 68 are formed. An open end portion of the drain pipe 48 facing the inside of the cooling duct 60 is surrounded by the overflow receiving means 65 including the receiving portion 66 and the weir portions 68 and 68 on the lower side and the side. The receiving portion 66 and the end portions of the dam portions 68 and 68 are configured to contact the inner wall surface 18b of the heat insulating box 18 via a packing 56 described later. Further, the upper edge of the dam portion 68 is set to be higher than the height of the upper end of the open end portion on the inflow side in the drain pipe 48.

  A gap defined between the outer surface of the drain pipe 48 and the inner surface of the drain port 52 is covered between the end of the overflow receiving means 66 and the inner wall surface 18b of the heat insulating box 18. A packing 56 externally attached to the drain pipe 48 is disposed. The packing 56 is formed of a material having elasticity such as synthetic resin, for example, and a through hole (not shown) that allows the drain pipe 48 to be inserted is opened at the center thereof, and is externally inserted into the drain pipe 48. Then, it is fixed by being sandwiched between the end portion of the overflow receiving means and the inner wall surface 18b of the heat insulating box 18.

  A drainage member 70 is disposed so as to be included in the rear wall portion of the heat insulating box 18. The drainage member 70 is an elbow with a flange, and a flange is brought into contact with the inner box 14 so that one opening faces the inside of the cooling chamber 36, and a drainage port 52 communicating with the cooling chamber 36 is provided. While being formed, a drain pipe 50 is connected to the other opening. The drain pipe 50 is configured to extend inside the heat insulating box 18 so that its outlet faces the inside of a drain pan (not shown) installed below the heat insulating box 18. Yes.

  Next, the effect | action of the drainage structure of the storage which concerns on an Example is demonstrated. In the cooling operation, liquefied refrigerant is supplied to the cooler 42 from the cooling device 26 disposed in the machine room 24 and is vaporized in the evaporation pipe of the cooler 42, thereby removing the heat of vaporization from the surroundings. Is cooled. Then, the blower fan 44 is operated, the air in the storage chamber 20 is sucked into the cooling chamber 36 from the suction port 38, and the cool air exchanged with the cooler 42 is discharged from the blower outlet 40 into the storage chamber 20. When the moisture in the storage chamber 20 comes into contact with the cooler 42, the cooler 42 freezes and forms frost on the surface of the cooler 42, which becomes thicker with time. Thus, heat exchange in the cooler 42 is hindered. Therefore, a defrosting operation is performed in which hot gas is supplied to the cooler 42 periodically or in accordance with a signal from a detection means such as a sensor to remove frost. In this defrosting operation, the defrosting water dripped from the cooler 42 to the cooling duct 60 reaches the drain pipe 48 connected to the inclined lower end along the slope of the bottom plate 62, and passes through the drain pipe 48. It passes through a drain pipe 50 extending inside the heat insulation box 18 and is discharged to a drain pan installed below the heat insulation box 18.

  By the way, when the drain pipe 48 is blocked by foreign matter or icing, the defrost water dripped from the cooler 42 is in a space defined by the receiving portion 66 and the weir portion 68 as shown in FIG. It is stored and finally overflows from the upper end edge of the weir portions 68 and 68 which are the most inclined lower end side and the contact portion of the heat insulating box 18, and travels along the inner wall surface 18 b of the heat insulating box 18. It reaches the bottom of the heat insulation box 18. Therefore, the defrost water overflowing from the cooling duct 60 is not applied to the articles stored in the storage chamber 20 located below the cooling duct 60. In addition, by raising the weir portions 68, 68 along both side portions of the drain pipe 48, it is guided to the contact portion with the inner wall surface 18b of the heat insulating box 18 which is the most inclined lower end side, No water leaks along the way.

  When the cooling duct 60 is attached, the drain pipe 48 is first inserted into the drain port 52 formed in the inner wall surface 18b of the heat insulation box 18, and the ends of the receiving part 66 and the weir part 68 are After abutting against the inner wall surface 18b of the heat insulating box 18 via the packing 56, the flange portion 64a of the side plate 64 of the cooling duct 60 is fixed to the ceiling surface of the heat insulating box 18 by fixing means such as screws. Yes. That is, the cooling duct 60 is positioned in the front-rear direction with respect to the heat insulation box 18 (the storage chamber 20), with the receiving portion 66 and the end of the weir 68 being in contact with the inner wall surface 18b of the heat insulation box 18. Can be determined. The horizontal position of the cooling duct 60 with respect to the heat insulating box 18 can be determined by inserting the drain pipe 48 into the drain port 52. Therefore, the mounting operation of the cooling duct 60 can be easily performed, and workability can be improved.

  The packing 56 that is extrapolated to the drain pipe 48 and covers a gap defined between the outer surface of the drain pipe 48 and the inner surface of the drain port 52 includes the end portions of the receiving portion 66 and the weir portion 68, and the Since it is pinched and fixed between the inner wall surface 18b of the heat insulation box 18, it will not shift. Therefore, outside air does not flow in from the gap, and condensation and icicle ice can be prevented from being generated.

  In addition, although it was set as the structure which the cooling duct used also as the water receiving tray for defrost water in the Example, the structure of this invention is employable also in the structure which made the cooling duct and the water receiving tray separate.

It is a sectional side view which shows the drainage structure of the storage which concerns on the suitable Example of this invention. It is a top view which shows the cooling duct provided with the drainage structure of the storage which concerns on an Example. It is a top view which expands and shows the X section of FIG. It is a sectional side view which shows the drainage structure of the conventional storage. It is a sectional side view which expands and shows the principal part of FIG.

Explanation of symbols

18 heat insulation box, 18b inner wall surface, 20 storage room, 36 cooling room 40 air outlet (cold air outlet gap), 42 cooler, 48 drain pipe, 52 water outlet 60 cooling duct (water collecting duct), 65 overflow receiving means

Claims (1)

A heat insulating box (18) that defines a storage chamber (20) for goods inside and a cooling chamber (36) that is provided above and includes a cooler (42), and is disposed below the cooling chamber (36). A water collecting duct that is provided and receives defrosted water dripping from the cooler (42) and defines a cold air blowing gap (40) with the inner wall surface (18b) of the heat insulating box (18). (60) and a drain pipe (48) connected to the water collecting duct (60) and connected to a drain port (52) that opens across the cold air blowing interval (40) and opens to the inner wall surface (18b). In the storage
Overflow receiving means (65) that faces the cold air blowing gap (40) and surrounds the lower and side of the drain pipe (48) is disposed in the water collecting duct (60),
The end of the overflow receiving means (65) is brought into contact with the inner wall surface (18b) ,
A packing (56) which is extrapolated to the drain pipe (48) and closes the gap between the drain pipe (48) and the drain port (52), the overflow receiving means (65) and the heat insulating box (18) A drainage structure of a storage, characterized in that it is sandwiched between the inner wall surface (18b) of the storage.

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