JP2022047138A - Refrigeration showcase - Google Patents

Abstract

To provide a refrigeration showcase which enables evaporation effect of drain water derived from a water absorber to be achieved more stably to inhibit humidity fluctuation of a product display chamber.SOLUTION: A refrigeration showcase includes: a body case 1 including a heat exchange chamber 3 in which a product display chamber 2 is housed in an upper part and an evaporator 15 and an evaporator fan 16 are housed in a lower part; a bottom wall 20 which partitions an interior of the body case 1 into the product display chamber 2 and the heat exchange chamber 3; a cool air outlet 22 which is provided at the rear of the bottom wall 20 and blows cool air generated by the evaporator 15 to the product display chamber 2; a drain ditch 26 which is formed recessed so as to form a downward step at a bottom part of a cold air passage 25 between the evaporator 15 and the cool air outlet 22; and water absorbers 27 each of which is disposed in the drain pitch 26 and impregnated with drain water to retain the drain water. An upper end of each water absorber 27 is located below a lower end of a cool air delivery port 15a formed on a rear surface of the evaporator 15 so as to prevent cool air blown from the cool air delivery port 15a from being blown directly onto the water absorbers 27.SELECTED DRAWING: Figure 2

Description

The present invention relates to a refrigerated showcase for face-to-face sales that displays and sells cakes, cooked foods, meats, and the like.

In this type of showcase, the cold air cooled by the evaporator is circulated between the heat exchange room and the product display room to keep the inside of the product display room at a low temperature. Therefore, when the circulating air passes through the evaporator, the moisture contained in the circulating air comes into contact with the heat radiation fins and the refrigerant pipe of the evaporator and is liquefied. The items on display above may dry out. In order to prevent such a decrease in humidity in the product display room, in the showcase of Patent Document 1, water absorption that absorbs the drain water (condensation water and defrost water) of the evaporator is provided on the bottom surface of the heat exchange chamber that houses the evaporator. A body (water-absorbing member) is provided to evaporate the drain water absorbed by the water-absorbing body with circulating air to prevent the humidity in the product display room from decreasing. The water absorbent is a porous molded body, specifically, a heat-reactive phenolic high-performance thermosetting resin having a particle size of 5 to 800 μm (for example, Univex manufactured by Unitica Co., Ltd.) is sintered at 50 to 160 ° C. It is made of a produced hydrophilic sintered molded body having a large number of pores (porosity of about 35%). The water absorber is spread over the entire bottom wall of the heat exchange chamber.

The applicant has previously proposed a refrigerated showcase having a similar humidifying structure (Patent Document 2). In the refrigerated showcase of Patent Document 2, a drain pan for receiving dew condensation water is provided at the lower part of the evaporator, and the water absorber immersed in the drain pan is used as an air supply path between the evaporator and the article storage room (product exhibition room). It is placed facing each other. The water absorber is formed of a foamed plastic sheet in a square shape, and only one of the four sides is immersed in the drain water in the drain pan.

Japanese Unexamined Patent Publication No. 02-93278 Jikkenhei 02-106573

According to the showcase of Patent Document 1, the drain water dripping from the evaporator is absorbed by the water absorber, and the drain water absorbed by the water absorber is evaporated by the circulating air to reduce the humidity of the product display room. Can be prevented. However, although the water absorber is spread over the entire bottom wall of the heat exchange chamber and more defrosted water can be impregnated into the water absorber, most of the circulating air blown out from the evaporator is the water absorber. Because it is sprayed on the water, the drain water evaporates more than necessary and the humidity in the product exhibition room tends to rise at once. On the contrary, when the water content in the water absorber decreases, the humidity in the product display room decreases at once. As described above, in the configuration of Patent Document 1, there is room for improvement in that the transpiration action derived from the water absorber cannot be stably obtained.

The same applies to the refrigerated showcase of Patent Document 2, and the water absorber formed in a square shape has only one side of the four sides immersed in drain water, and further, an evaporator. Since most of the circulating air blown out from the water absorber is blown to the water absorber, there is a risk that the upper half side of the water absorber will always be in a dry state and the transpiration action will not be exhibited, and the transpiration action derived from the water absorber in a stable manner. There was room for improvement in that it could not be obtained.

An object of the present invention is to have a refrigerated showcase in which a water absorber that absorbs the drain water of the evaporator is provided on the bottom surface of a heat exchange chamber that houses the evaporator, and that the drain water derived from the water absorber evaporates. The purpose is to suppress humidity fluctuations in the product exhibition room so that it can be exhibited more stably.

The refrigerated showcase of the present invention has a main body case 1 having a product display room 2 in which products are stored in the upper part and a heat exchange chamber 3 in which an evaporator 15 and an evaporator fan 16 are housed in the lower part, and a main body case 1. A bottom wall 20 that divides the inside into a product display room 2 and a heat exchange room 3, and a suction port provided on the front side of the bottom wall 20 to suck the air inside the refrigerator in the product display room 2 into the heat exchange room 3. 21 and a cold air outlet 22 provided on the rear side of the bottom wall 20 and blowing out the cooling air generated by the evaporator 15 toward the product exhibition room 2, and between the evaporator 15 and the cold air outlet 22. A drainage groove 26, which is formed in a stepped-down shape at the bottom of the cold air passage 25 to receive the drain water of the evaporator 15, and a water absorber 27 arranged in the drainage groove 26 to impregnate and hold the drain water are provided. The upper end of the water absorbent 27 is located below the lower end of the cold air outlet 15a formed on the rear surface of the evaporator 15.

The upper surface of the drainage groove 26 is formed by an inclined wall 29 that inclines downward toward the groove side end in the left-right direction, and the water absorber 27 is arranged on the upper surface of the inclined wall 29, and the inclined lower end of the drainage groove 26. A drain hole 30 is arranged in the portion so that the drain water flowing down along the drainage groove 26 flows down to the bottom of the main body case 1.

The front-rear width L1 of the water-absorbing body 27 is set smaller than the front-rear width L2 of the drainage groove 26, and drainage that promotes the flow of drain water to the bottom of the groove between the leading edge of the water-absorbing body 27 and the front edge of the drainage groove 26. The wall 32 is exposed.

The water absorbing body 27 is configured by arranging a plurality of horizontally long square-shaped unit water absorbing bodies 27a adjacently to each other, and a gap E allowing the flow of drain water is formed between the adjacent unit water absorbing bodies 27a.

The unit water-absorbing body 27a is composed of a non-woven fabric-made water-absorbing sheet 35 that has been subjected to antibacterial processing and deodorizing processing, and a shape-retaining frame 36 that retains the shape of the water-absorbing sheet 35.

In the present invention, a cold air outlet 22 is formed on the rear side of the bottom wall 20 to blow out the cooling air generated by the evaporator 15 toward the product exhibition room 2, and the evaporator 15 and the cold air outlet 22 are combined with each other. A drainage groove 26 for receiving the drain water is formed in a stepped-down shape at the bottom of the cold air passage 25 between them, and a water absorber 27 impregnating and holding the drain water is arranged in the drainage groove 26. Further, in the present invention, the upper end of the water absorber 27 is positioned below the lower end of the cold air outlet 15a formed on the rear surface of the evaporator 15. When the upper end of the water absorber 27 is positioned below the lower end of the cold air outlet 15a formed on the rear surface of the evaporator 15 in this way, it is generated by the evaporator 15 and sent out from the cold air outlet 15a. Since it is possible to prevent the cooling air from being directly blown to the water absorbing body 27, the evaporation action of the water absorbing body 27 becomes excessive, or the water absorbing body 27 becomes dry and cannot exert the evaporation action. It can be effectively prevented. From the above, according to the present invention, since the transpiration action derived from the water absorber 27 can be exerted more stably, the humidity fluctuation of the product exhibition room 2 can be suppressed.

The upper surface of the drainage groove 26 is formed by an inclined wall 29 that inclines downward toward the groove side end in the left-right direction, and the water absorbing body 27 is arranged on the upper surface of the inclined wall 29, and at the inclined lower end portion of the drainage groove 26. If a drain hole 30 is arranged to allow drain water flowing down along the drainage groove 26 to flow down to the bottom of the main body case 1, excess drain water is allowed to flow down along the inclined wall 29, and the excess drain water flows down from the drain hole 30 to the main body case 1. By discharging the water to the bottom of the water absorber 27, it is possible to prevent the water absorber 27 from being excessively impregnated with drain water. Therefore, the degree of impregnation of the water absorbing body 27 can be adjusted to an appropriate level, and the cooling air containing an appropriate amount of water can be supplied to the product exhibition room 2. Further, especially during the defrosting operation, a large amount of defrosting water flows down to the drainage ditch 26 as compared with the dew condensation water, but even in that case, excess defrosting is performed by flowing down the defrosting water along the inclined wall 29. Water can be reliably drained from the drain hole 30.

The front-rear width L1 of the water absorber 27 is set smaller than the front-rear width L2 of the drainage groove 26, and a drainage wall 32 that promotes the flow of drain water is provided at the bottom of the groove between the front edge of the water absorber 27 and the front edge of the drainage groove 26. When exposed, a part of the drain water that has flowed down into the drainage ditch 26 can be quickly flowed down along the drainage wall 32, so that the water absorber 27 is more reliably impregnated with the drainage water. Can be prevented. Therefore, the drain water can be drained more quickly, especially during the defrosting operation.

When a plurality of horizontally long square-shaped unit water absorbent bodies 27a are arranged adjacent to each other to form a water absorbing body 27 and a gap E allowing the flow of drain water is formed between the adjacent unit water absorbing bodies 27a, for example, water absorption. Even if the body 27 becomes dirty due to the adhesion of food waste, it is sufficient to replace only the corresponding unit water absorbent body 27a, and the labor for maintenance can be reduced. Further, since the gap E is formed between the adjacent unit water absorbers 27a, a part of the drain water flowing down along the inclined wall 29 and the drainage wall 32 is allowed to flow into the gap E and is located on the lower inclined side. The unit water absorbing body 27a can be efficiently impregnated.

When the unit water-absorbing body 27a is composed of a non-woven fabric-made water-absorbing sheet 35 that has been subjected to antibacterial processing and deodorizing processing, and a shape-retaining frame 36 that retains the shape of the water-absorbing sheet 35, mold is generated on the water-absorbing sheet 35. Alternatively, it is possible to prevent the propagation of various germs and keep the unit water absorber 27a in a hygienic state for a long period of time. Further, since the water-absorbing sheet 35 lacking self-retaining property is retained by the shape-retaining frame 36, the surface area of the water-absorbing sheet 35 can be kept constant, and a certain amount of drain water can be impregnated and held. The evaporation action of 35 can be made constant.

It is a vertical sectional side view of the main part of the refrigerated showcase which concerns on embodiment of this invention. It is a vertical sectional side view of a refrigerated showcase. It is a cross-sectional plan view of a heat exchange chamber. FIG. 3 is a cross-sectional view taken along the line AA in FIG.

(Example)
Examples of the refrigerated showcase according to the present invention are shown in FIGS. 1 to 4. The front-back, left-right, and up-down in this embodiment follow the crossing arrows shown in FIGS. 2 and 3 and the notations of front-back, left-right, and up-down in the vicinity of the arrows. As shown in FIG. 2, the refrigerated showcase has a main body case 1 composed of a horizontally long heat insulating box, and a product display room 2 and a heat exchange room 3 are partitioned inside the main body case 1, and the lower side of the heat exchange room 3 is provided. The machine room 4 is partitioned in. The front surface of the product exhibition room 2 is covered with a curved transparent glass wall 5 having a multi-layer structure, and a door 7 that can be opened and closed by a slide is arranged at the product entrance 6 on the rear surface. Inside the product display room 2, an exhibition shelf 8 on which the exhibited products are placed is provided, and a lighting fixture 9 is arranged on the upper wall of the product display room 2.

The cooling unit 11 for cooling the inside of the product display room 2 includes a compressor 12, a condenser 13, and a condenser fan 14 arranged inside the machine room 4, and an evaporator arranged inside the heat exchange room 3. It is composed of 15 and an evaporator fan 16. The product display room 2 and the heat exchange room 3 are separated by a heat insulating wall (bottom wall) 20 on the bottom surface of the product display room 2, and a suction port 21 for circulating air is opened along the leading edge of the wall 20. A cold air outlet 22 having a louver structure is provided along the trailing edge of the wall 20. The bottom wall 3a of the heat exchange chamber 3 is inclined downward toward the rear end side of the main body case 1.

The air inside the refrigerator introduced from the product display room 2 to the heat exchange room 3 by the blowing action of the evaporator fan 16 is pressurized by the evaporator fan 16 and then cooled while passing through the evaporator 15 to cool the air. It is blown out from the cold air outlet 22 to the product exhibition room 2. As shown in FIG. 3, the evaporator 15 is formed in a horizontally long rectangular parallelepiped shape, and four evaporator fans 16 are arranged on a partition wall 23 provided on the front side thereof. In the front part of the machine room 4, an anti-fog fan 17 for supplying anti-fog air is arranged between the glass walls 5 having a multi-layer structure. In the machine room 4, the air introduced from the rear wall is pressurized by the condenser fan 14, then heat is taken while passing through the condenser 13, and is discharged from the louver structure 24 of the front wall toward the floor surface. To.

At the bottom of the cold air passage 25 between the evaporator 15 and the cold air outlet 22, a drainage groove 26 for receiving drain water such as dew condensation water and defrosting water generated in the evaporator 15 is formed as a stepped recess. A water absorbing body 27 that impregnates and holds drain water is arranged in the groove of the groove 26. At the rear end of the bottom wall 3a of the heat exchange chamber 3, a flow-down wall 28 that inclines downward toward the drainage groove 26 is formed. The drainage ditch 26 is formed in a chevron shape by left and right inclined walls 29 and 29 that gently incline toward the groove side ends located in the left and right directions, and the water absorber 27 is arranged on each inclined wall 29 and 29. ing. A drain hole 30 for draining drain water to a drain trap (not shown) at the bottom of the main body case 1 is opened at the inclined lower end of the drain groove 26, and a drain pipe is connected to the lower portion thereof (FIG. 3). reference). The groove top 31 adjacent to each inclined wall 29/29 is located in the center of the left and right of the drainage groove 26, and the drain water flowing down to each inclined wall 29/29 is guided down toward the left and right drain holes 30. .. As shown in FIG. 1, a door drain pipe 33 for draining the dew condensation water flowing down from the door 7 to the drainage ditch 26 is arranged on the guide rail that guides and supports the door 7.

The water absorbing body 27 is composed of a plurality of horizontally long square-shaped unit water absorbing bodies 27a, and in this embodiment, two unit water absorbing bodies 27a are arranged adjacent to each of the inclined walls 29 and 29 to form the water absorbing body 27. The unit water-absorbing body 27a is composed of a water-absorbing sheet 35 formed of a non-woven fabric sheet that has been subjected to antibacterial processing and deodorizing processing, and a shape-retaining frame 36 that retains the shape of the sheet 35. The shape-retaining frame 36 is made of a thin metal plate, a wire, or a plastic molded product. As shown in FIG. 1, the front-rear width L1 of the water-absorbing body 27 is set smaller than the front-rear width L2 of the drainage groove 26, and when the left and right water-absorbing bodies 27 are arranged along the trailing edge of the drainage groove 26, water absorption is performed. A drainage wall 32 that promotes the flow of drain water is exposed at the bottom of the groove between the leading edge of the body 27 and the leading edge of the drainage groove 26. The drainage wall 32 is a part of the inclined wall 29. Further, the upper end of the water absorbent 27 provided on each of the inclined walls 29 and 29 is arranged below the lower end of the cold air outlet 15a on the rear surface of the evaporator 15, and the cooling air blown out from the cold air outlet 15a is arranged. Is prevented from being directly sprayed on the water absorber 27. Further, a gap E that allows the flow of drain water is formed between the unit water absorbing bodies 27a arranged adjacent to the inclined walls 29 and 29.

When using a refrigerated showcase, a group of trays on which products are placed is displayed on the display shelf 8, the cooling unit 11 is operated, and the cooling air cooled by the evaporator 15 is sent to the product exhibition room 2. The product is fed and the internal temperature of the product display room 2 is maintained at a predetermined temperature state (for example, 4 ° C.). While the air inside the refrigerator repeatedly circulates between the product display room 2 and the heat exchange room 3, the moisture contained in the cooling air comes into contact with the refrigerant pipes and fins of the evaporator 15, and is liquefied and condensed. Drops on the bottom wall 3a of the heat exchange chamber 3. Further, the dew condensation water received by the bottom wall 3a flows down along the inclined bottom wall 3a, and is drained from the down wall 28 to the drainage ditch 26. The dew condensation water drained to the drainage ditch 26 flows along the drainage wall 32 of each inclined wall 29, and a part of the dew condensation water comes into contact with each unit water absorber 27a and is impregnated. At this time, the dew condensation water drained to the drainage groove 26 near the groove top 31 is impregnated into the unit water absorber 27a while flowing down along the leading edge of the unit water absorber 27a on the inclined upper side. Similarly, the dew condensation water drained into the drainage groove 26 at a position away from the groove top portion 31 is impregnated into the unit water absorber 27a while flowing down along the leading edge of the unit water absorber 27a on the lower inclined side. Further, by performing the defrosting operation at regular intervals, a large amount of defrosting water is drained to the drainage ditch 26, so that each unit water absorber 27a is impregnated with a sufficient amount of defrosting water. Since the amount of frost water is sufficiently larger than the amount of defrost water, a part of the defrost water flows into the gap E and is impregnated into the unit water absorber 27a on the lower inclined side. The defrosted water that has not been impregnated into the unit water absorber 27a is discharged from the drain hole 30.

As described above, according to the refrigerated showcase of the present embodiment, the upper end of the water absorber 27 is positioned below the lower end of the cold air outlet 15a formed on the rear surface of the evaporator 15, so that the evaporator is used. It is possible to prevent the cooling air generated by 15 and sent out from the cold air outlet 15a from being directly blown to the water absorber 27. According to this, it is possible to effectively prevent the water absorbing body 27 from excessively evaporating action or the water absorbing body 27 from drying out and being unable to exert the evaporative action, so that the humidity of the product display room 2 is excessive. It is possible to prevent the humidity from rising to 1 or the humidity of the product exhibition room 2 from dropping at once. Therefore, according to this refrigerated showcase, the transpiration action derived from the water absorber 27 can be exerted more stably, and the humidity fluctuation of the product exhibition room 2 can be suppressed.

The upper surface of the drainage groove 26 is formed by an inclined wall 29 that inclines downward toward the end of the drainage groove in the left-right direction. Since the drain hole 30 is arranged to allow the drain water flowing down along the groove 26 to flow down to the bottom of the main body case 1, excess drain water is allowed to flow down along the inclined wall 29 from the drain hole 30 to the bottom of the main body case 1. By discharging the water, it is possible to prevent the water absorber 27 from being excessively impregnated with drain water. Therefore, the degree of impregnation of the water absorbing body 27 can be adjusted to an appropriate level, and the cooling air containing an appropriate amount of water can be supplied to the product exhibition room 2. In particular, during the defrosting operation, a larger amount of defrosting water flows down to the drainage ditch 26 than the dew condensation water, but even in that case, excess defrosting water flows down along the inclined wall 29 to ensure that it flows down from the drain hole 30. Can be discharged.

The front-rear width L1 of the water-absorbing body 27 is set smaller than the front-rear width L2 of the drainage groove 26, and a drainage wall 32 that promotes the flow of drain water is provided at the bottom of the groove between the front edge of the water-absorbent body 27 and the front edge of the drainage groove 26. Since it is exposed, a part of the drain water that has flowed down into the drainage ditch 26 can be quickly flowed down along the drainage wall 32. As a result, it is possible to more reliably prevent the water absorbing body 27 from being excessively impregnated with the drain water, so that the drain water can be drained more quickly, especially during the defrosting operation.

When a plurality of horizontally long square-shaped unit water absorbent bodies 27a are arranged adjacent to each other to form a water absorbing body 27 and a gap E allowing the flow of drain water is formed between the adjacent unit water absorbing bodies 27a, for example, water absorption. Even if the body 27 becomes dirty due to the adhesion of food waste, it is sufficient to replace only the corresponding unit water absorbent body 27a, and the labor for maintenance can be reduced. Further, since the gap E is formed between the adjacent unit water absorbers 27a, a part of the drain water flowing down along the inclined wall 29 and the drainage wall 32 is allowed to flow into the gap E and is located on the lower inclined side. The unit water absorbing body 27a can be efficiently impregnated.

Since the unit water-absorbing body 27a is composed of a non-woven fabric-made water-absorbing sheet 35 that has been subjected to antibacterial processing and deodorizing processing, and a shape-retaining frame 36 that retains the shape of the water-absorbing sheet 35, mold is generated on the water-absorbing sheet 35, or It is possible to prevent the growth of various germs and keep the unit water absorber 27a in a hygienic state for a long period of time. Further, since the water-absorbing sheet 35 lacking self-retaining property is retained by the shape-retaining frame 36, the surface area of the water-absorbing sheet 35 can be kept constant, and a certain amount of drain water can be impregnated and held. The evaporation action of 35 can be made constant.

In the above embodiment, the drainage ditch 26 is formed in a chevron shape by a pair of sloping walls 29, but it is not necessary to form the drainage ditch 26 in a valley shape by a pair of sloping walls 29 that incline downward toward the center of the drainage ditch 26. be able to. In that case, since one drain hole 30 may be provided in the central portion of the drainage groove 26, the drainage structure can be simplified by that amount. If the left-right width of the refrigerated showcase is small, the drainage groove 26 may be formed by providing an inclined wall 29 that inclines downward from one side end of the drainage groove 26 toward the other side end.

In addition to the above, three or more water absorbent bodies 27 may be arranged on each inclined wall 29. The unit water absorber 27a can be formed in a horizontally long parallelogram or trapezoid in addition to being formed in a horizontally long square shape.

1 Main body case 2 Product exhibition room 3 Heat exchange room 11 Cooling unit 15 Evaporator 15a Evaporator cold air outlet 16 Evaporator fan 20 Bottom wall (insulation wall)
21 Suction port 22 Cold air outlet 25 Cold air passage 26 Drainage groove 27 Water absorption body 27a Unit Water absorption body 29 Inclined wall 30 Drain hole 32 Drainage wall 35 Water absorption sheet 36 Shape-retaining frame L1 Front and rear width of water absorption body L2 Front and rear width of drainage groove E Unit Adjacent gap of water absorber

Claims (5)

A main body case (1) having a product display room (2) in which products are stored in the upper part, and a heat exchange room (3) in which an evaporator (15) and an evaporator fan (16) are housed in the lower part.
The bottom wall (20) that divides the inside of the main body case (1) into a product display room (2) and a heat exchange room (3), and
A suction port (21) provided on the front side of the bottom wall (20) to suck the air inside the refrigerator in the product exhibition room (2) into the heat exchange room (3).
A cold air outlet (22) provided on the rear side of the bottom wall (20) and blowing out the cooling air generated by the evaporator (15) toward the product exhibition room (2).
A drainage ditch (26) that is formed in a stepped-down shape at the bottom of the cold air passage (25) between the evaporator (15) and the cold air outlet (22) to receive the drain water of the evaporator (15).
A water absorber (27) arranged in the drainage ditch (26) to impregnate and hold drain water, and
Equipped with
A refrigerated showcase characterized in that the upper end of the water absorber (27) is located below the lower end of the cold air outlet (15a) formed on the rear surface of the evaporator (15). The upper surface of the drainage groove (26) is formed by an inclined wall (29) that inclines downward toward the groove side end in the left-right direction, and a water absorber (27) is arranged on the upper surface of the inclined wall (29). Cage,
The first aspect of the present invention, wherein a drain hole (30) for allowing drain water flowing down along the drainage groove (26) to flow down to the bottom of the main body case (1) is arranged at the inclined lower end portion of the drainage groove (26). Refrigerated showcase. The front-rear width (L1) of the water absorber (27) is set smaller than the front-rear width (L2) of the drainage ditch (26).
The water absorber (27) is arranged along the trailing edge of the drainage ditch (26), and drain water flows down to the bottom of the groove between the leading edge of the water absorber (27) and the leading edge of the drainage ditch (26). The refrigerated showcase according to claim 1 or 2, wherein the drainage wall (32) is exposed. The water absorbent body (27) is configured by arranging a plurality of horizontally long square-shaped unit water absorbent bodies (27a) adjacent to each other.
The refrigerated showcase according to claim 2 or 3, wherein a gap (E) is formed between adjacent unit water absorbers (27a) to allow the flow of drain water. Claimed that the unit water absorbent body (27a) is composed of a non-woven fabric water absorbing sheet (35) which has been subjected to antibacterial processing and deodorizing processing, and a shape-retaining frame (36) which holds the water absorbing sheet (35). The refrigerated showcase described in 4.

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