WO2008001619A1

WO2008001619A1 - Cooling storage

Info

Publication number: WO2008001619A1
Application number: PCT/JP2007/062010
Authority: WO
Inventors: Kiyoshi Kato; Etsuo Sugiyama; Masayuki Nishio; Daisuke Hiraki
Original assignee: Hoshizaki Denki Kabushiki Kaisha
Priority date: 2006-06-28
Filing date: 2007-06-14
Publication date: 2008-01-03
Also published as: US20100231100A1; CN101479545A; JP2008008532A; EP2034262A1; JP5173156B2; CN101479545B; EP2034262B1; EP2034262A4; AU2007264546A1

Abstract

A drain pipe (33) for draining defrost water to the outside is projected from a back side (10A) of a refrigerator body (10), and an evaporation tray (41) with an evaporation heater (60) is attached below the drain pipe (33). The evaporation tray (41) has a box-shaped body section (42) whose back side and upper side are open, and also has a back plate (48) having a flange (49) at its peripheral edge. The flange (49) of the back plate (48) is superposed and welded to an opening edge on the back side of the body section (42), and as a result, the flange (49) has a box shape. A recess (55) is formed by the inner side of the flange (49). The back side of the evaporation tray (41) is engaged in a line contact manner to the back side (10A) of the refrigerator body (10) only at a thin peripheral wall surrounding the recess (55). The presence of the recess (55) forms an air layer (A) between the evaporation tray (41) and the back side (10A) of the refrigerator body (10). Because the air layer (A) functions as a heat insulation layer, heat of the evaporation tray (41) is less likely to be transmitted to the inside of the storage.

Description

Specification

Cooling storage

Technical field

TECHNICAL FIELD [0001] The present invention relates to a cooling storage cabinet provided with an evaporating dish for collecting and evaporating drainage in a warehouse such as defrost water on a side surface such as a back surface of a storage body. Background art

[0002] Conventionally, as an example of this type of cooling storage, one described in Patent Document 1 is known. This product is equipped with a cooler on the ceiling inside the storage unit and a drain pan that receives defrost water on its lower surface. A drain pipe connected to the drain pan penetrates the wall of the storage unit and back. An evaporating dish in the form of a box with an upper surface opening equipped with a throw-in type heater is attached to the lower part of the top, and defrosted water received by a drain pan during defrosting operation. Is stored in an evaporating dish by a drain pipe and is heated by a heater to evaporate, and the steam rises from the top opening and is discharged.

Patent Document 1: JP-A-8-200919

Disclosure of the invention

[0003] (Problems to be solved by the invention)

However, in the above-mentioned conventional one, since one side of the evaporating dish hits the back of the main body of the storage, the heat of the evaporating dish is transmitted to the inside of the cabinet, although it is a heat insulating wall, and unnecessary temperature inside the warehouse. There is a possibility that the temperature rises, and conversely, there is a problem that the temperature of the evaporating dish decreases and the evaporation capacity of the waste water decreases.

The present invention has been completed based on the above circumstances, and its purpose is to prevent heat transfer from the evaporating dish to the inside of the cabinet.

[0004] (Means for solving the problem)

In the present invention, a drainage pipe for discharging the drainage in the warehouse such as defrost water to the outside is projected on the side surface of the storage body, and the drainage in the warehouse from the drainage pipe is provided below the drainage pipe. In a cooling storage provided with an evaporating dish to be accumulated and evaporated by a heating means, the evaporating dish The surface of the storage body opposite to the side surface is characterized in that a recess is formed to form an air layer between the side surface.

[0005] According to the above configuration, the waste water in the warehouse stored in the evaporating dish is evaporated and discharged by being heated by the heating means, and the evaporating dish itself is also heated at the same time. Since an air layer is formed between the container and the side of the storage body to which it is applied, it functions as a heat insulation layer, so the heat of the evaporating dish is difficult to be transferred to the interior.

[0006] Further, the following configuration may be adopted.

By forming a thin peripheral wall on the peripheral edge of the evaporating dish facing the side surface of the storage body, the recess is formed inside the peripheral wall. In this configuration, in addition to the formation of an air layer for heat insulation between the evaporating dish and the side surface of the storage body, only the thin peripheral wall is applied to the side surface of the storage body, so that it is in a line contact state. It is harder to transfer heat.

[0007] The evaporating dish has a box-shaped main body portion in which two surfaces of the storage main body facing the side surface and an upper surface are opened, and a side plate portion provided with a flange bent at a right angle on the front surface side at the periphery. The side plate portion is fitted on the opening facing surface of the main body portion, and the flange is overlapped on the opening edge of the facing surface and welded to form a box shape with an upper surface opening. And the said recessed part is formed by the inner side of the said flange.

In this configuration, when the side plate part is assembled and welded to the opposed surface of the main body part, the flange bent at a right angle of the side plate part is fitted to the opening edge of the opposed surface. Compared with, the side plate can be positioned smoothly and the welding operation can be performed smoothly, and fins and evaporating dishes can be manufactured in a short time.

[0008] (Effect of the invention)

According to the present invention, heat transfer from the evaporating dish to the interior is prevented. As a result, the temperature in the cabinet is prevented from rising unnecessarily, and conversely, the temperature of the evaporating dish is also prevented from decreasing, and the evaporation capacity of the waste water in the cabinet is also prevented from decreasing.

Brief Description of Drawings

FIG. 1 is a longitudinal sectional view of the vicinity of an installation position of an evaporator of a refrigerator according to an embodiment of the present invention. FIG. 2 is a rear view of the refrigerator. [Figure 3] Disassembled perspective view showing the mounting structure of the evaporating dish and the outside

[Fig. 4] Exploded perspective view showing mounting structure of top plate and cover of duct

[Figure 5] Perspective view of drain pipe

[Figure 6] Disassembled perspective view of evaporating dish

[Fig.7] Perspective view when evaporating dish is assembled

[Fig. 8] Perspective view of the state where the evaporation heater is supported on the bracket.

[Fig. 9] Top view of the evaporating dish with an evaporation heater

[Figure 10] Perspective view of bracket

FIG. 11 is an exploded perspective view showing the mounting structure of the top plate of the evaporating dish

FIG. 12 is a perspective view showing the structure near the position where the evaporator is installed.

[Figure 13] Partial cutaway rear view

[Figure 14] Partially cutaway rear view explaining the function of the shielding plate

[Fig. 15] Longitudinal section showing the structure of the evaporator

Explanation of symbols

[0010] 10 ... Refrigerator body (storage body) 10A ... Back side (side of refrigerator body 10) 33 ... Drain pipe 35 ... Drain port 41 ... Evaporating dish 42 ... Body part 42A ... ( Opening edge (peripheral wall) 48 ... Back plate (side plate) 49 ... Flange (peripheral wall) 55 ... Recess 60 ... Evaporation heater (calorie heat means) A ... Air layer

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 15. In this embodiment, the case of application to a commercial vertical refrigerator is illustrated, and the structure of the refrigerator will be described with reference to FIGS.

The refrigerator main body 10 is also configured to have a vertically long heat insulating box body with a front opening, and the inside is defined as a storage chamber 11. A heat insulating door 12 is attached to the front opening of the storage chamber 11 so that it can be opened and closed. A machine room 14 surrounded by a panel is formed on the top surface of the refrigerator main body 10, and a refrigeration apparatus 15 is installed therein. The refrigeration unit 15 includes a compressor 16, an air-cooled condenser 17 equipped with a condenser fan 17A, etc., and is mounted on a heat-insulating base 18 as a unit. The base 18 is a storage room. 11 Ceiling wall window hole 19 The

A drain pan 20 that also serves as an air duct is stretched on the lower surface side of the window hole 19 in the ceiling portion of the storage chamber 11, and a cooler chamber 21 is formed above the drain pan 20. The bottom surface of the drain pan 20 is formed to have a downward slope toward the back edge (right side in FIG. 1), and a suction port 22 is opened in the front area, and a blow-out port 23 is cut out on the back edge side. It is not formed. Inside the cooler chamber 21, a cooler 25 and an internal fan 26 facing the suction port 22 are provided. The cooler 25 is circulated and connected to the above-described refrigeration apparatus 15 by refrigerant piping, and constitutes a well-known refrigeration site.

Then, when the internal fan 26 is driven while the refrigeration apparatus 15 (compressor 16) is operated, the storage chamber

11 indoor air is sucked into the cooler chamber 21 through the suction port 22, and cold air is generated by heat exchange while the air flows through the cooler 25, and the cold air flows from the outlet 23 to the back surface of the storage chamber 11. The cool air is circulated in the storage chamber 11 to be cooled.

As the compressor 16 is operated, the condenser fan 17A is also operated, and outside air is sucked from an intake port (not shown) provided in the front panel 14A of the machine room 14, and the condenser 17 These are cooled by passing through the compressor 16, and the exhaust heat after being subjected to cooling is discharged from the exhaust port 28 provided in the rear panel 14B of the machine room 14 toward the rear side. It is. The exhaust port 28 is formed by arranging a large number of slits vertically and horizontally, and is formed in a wide rectangular shape at the center of the rear panel 14B and a horizontally elongated shape as a whole.

[0014] On the other hand, a defrosting operation is appropriately performed in order to remove frost attached to the cooler 25 and the like.

The defrosting operation is performed by energizing the defrosting heater (not shown) equipped in the cooler 25 to heat the cooler 25. After the melted defrost water is received by the drain pan 20, As will be described in detail later, the refrigerant is guided and stored in an evaporator 40 provided on the back surface 10A side of the refrigerator main body 10, and is forcibly evaporated by being continuously heated to be discharged.

[0015] Next, the structure of the portion where the evaporator 40 is disposed will be described.

First, the structure of the drainage portion of the defrost water received by the drain pan 20 will be described. From the rear edge of the drain pan 20, the drain pipe 30 protrudes in an oblique posture with the tip slightly downward. The On the other hand, at the position corresponding to the rear of the drain pipe 30 on the back wall 11A of the refrigerator main body 10, as shown in FIG. 15, a drain tube 32 made of synthetic resin passes through the back wall 11A and is mounted. The drain cylinder 32 has an oblique posture that is slightly steeper than the drain pipe 30 with the end on the outside of the warehouse facing downward. A drain pipe 33 projects from the outer end of the drain cylinder 32.

[0016] The drain pipe 33 is also made of a synthetic resin having a low thermal conductivity. As shown in FIG. 5, the drain pipe 33 is relatively short and has a flange 34 slightly behind the center in the length direction. Right angle force Formed in a slightly inclined crossing posture. The drainage pipe 33 is attached in a predetermined rotational posture by fitting the flange 34 to the rear surface 10A of the refrigerator main body 10 and fitting the rear end of the drainage pipe body 32 to the double cylinder part 32A at the outer end of the drainage cylinder 32. At this time, the drainage pipe 33 is in a downward-falling posture at the same angle as the drainage cylinder 32, and the front end side of the flange 34 protrudes out of the refrigerator from the back surface 10 A of the refrigerator body 10.

The distal end surface of the drain pipe 33 is closed, and the distal end surface is formed in a curved surface having a substantially semicircular shape when viewed from above. A circular drain port 35 is opened on the lower surface of the distal end portion of the drain pipe 33. In addition, a relief port 36 having a circular shape of the same size is opened at a position directly above the drainage port 35 on the upper surface.

[0017] As shown in FIGS. 13 and 15, the evaporator 40 is generally an evaporation heater in which defrost water is stored at a position below the protruding portion of the drain pipe 33 on the rear surface 10A of the refrigerator body 10. An evaporating dish 41 forcibly evaporating by 60 is provided, and a duct 85 for guiding the steam upward is attached above the evaporating dish 41 and further covered with a cover 105.

As shown in FIG. 6, the evaporating dish 41 includes a main body portion 42 made of a metal plate such as a stainless steel plate and a back plate 48. When the evaporating dish 41 is completed, as shown in FIGS. 3 and 7, the evaporating dish 41 is formed in a box shape having a wide opening and a narrow depth at the top opening. However, the main body 42 is added to the top of the above boxes. Thus, the refrigerator main body 10 is formed in a shape having an open back surface facing the back surface 10A.

A narrow flange 45 that is bent at a right angle outward is formed at the upper edge of the surface plate 43 in the main body 42 and the left side plate 44A as viewed from the back, while the upper edge of the right side plate 44B is Similarly, a wide mounting plate 46 is formed although it is bent at right angles outward.

[0019] The back plate 48 is fitted to the opened back surface of the main body 42, and is formed in a shallow dish shape with a short flange 49 on the periphery. A mounting plate 50 is formed upward from the opening edge of the upper flange 49 in the back plate 48, and the back surface of the mounting plate 50 and the opening edges of the left and right and lower flanges 49 are located on the same plane. It is supposed to do. The left end of the mounting plate 50 as viewed from the back protrudes from the left end edge of the back plate 48, and through holes 53 for screws 52 (Fig. 3) are formed at both left and right ends, and at the upper edge. In the position close to the right end portion, an escape recess 54 is formed in which the drain pipe 33 is fitted and escaped.

[0020] The back plate 48 is fitted to the opened back surface of the main body 42 as shown in FIG. At that time, the left and right and lower flanges 49 are aligned with the opening edges 42A on the back surface of the main body 42, specifically, the opening edges of the left and right side plates 44A and 44B and the bottom plate 47, and are overlapped on the inside. The upper flange 49 is flush with the left flange 45 and the mounting plate 46 in the main body 42, and the projecting portion of the left end of the mounting plate 50 is in a state where the root rests on the edge of the left flange 45. .

Then, the left and right and lower flanges 49 of the back plate 48 are fixed to the opening edge 42A on the back surface of the overlapped main body 42 by welding, thereby forming a box shape with an upper surface opening as described above. An evaporating dish 41 is formed. At this time, on the back surface of the evaporating dish 41, a relatively shallow but substantially concave portion 55 is formed inside the flange 49.

In the evaporating dish 41, a throwing-type evaporating heater 60 composed of a sheathed heater is mounted in a state supported by a bracket 65. The sheathed heater basically has a structure in which a heating wire that is coiled and passed through a metal pipe and filled with an insulating powder. The evaporation heater 60 of this embodiment has the structure shown in FIG. As shown in Fig. 9, one elongated bar is bent into a hairpin shape at the center length, and the two bars are arranged in parallel, and this is bent at a right angle in the middle of the length direction. Thus, the horizontal portion 62 is provided on the distal end side of the vertical portion 61. The vertical part 61 has a length dimension slightly larger than the depth of the evaporating dish 41 as shown in FIG. 14 and the like, while the horizontal part 62 is slightly less than twice the vertical part 61 and It has a predetermined amount shorter than the dimension in the longitudinal direction. However, in this embodiment, only the horizontal portion 62 of the evaporation heater 60 is a heat generating portion (see the shaded portion in FIG. 14), and the vertical portion 61 is a non-heat generating portion. Yes. Therefore, in the vertical part 61, the heating wire is removed or the metal pipe is replaced with a non-thermally conductive pipe.

Further, lead wires 63 are connected to and drawn out from two upper ends of the vertical portion 61, respectively, and the connecting portions are molded with a molding resin (molded portion 64).

The bracket 65 is formed into a shape shown in FIG. 10 by press-molding a metal plate. The bracket 65 has a predetermined region at the right end as viewed from the rear surface of the upper surface opening 41A of the evaporating dish 41, for example, the upper surface opening 41A. It has a mounting part 66 that covers about 1/5 of the total length. A flange 67 is bent downward on the front edge of the mounting portion 66. Further, an L-shaped attachment plate 68 can be placed on the right end side of the attachment portion 66, and a flange 69 is also bent downward on the right edge of the bottom plate 68A of the attachment plate 68.

As shown in FIG. 3, the evaporating heater 60 has a posture in which the front end of the horizontal portion 62 faces the left side, and both upper ends of the vertical portion 61 are formed in the through holes 70 (FIG. 10) in the bracket 65. The evaporating heater 60 is inserted into the evaporating dish 41 from below, and the bracket 65 engages the flange 67 in front of the mounting portion 66 with the edge of the front flange 45 in the evaporating dish 41. In addition, the rear edge of the mounting portion 66 is placed on the rear flange 49 and covered with the right end of the upper surface opening 41A. At that time, the lateral portion 62 of the evaporating heater 60 is brought into contact with the bottom surface of the evaporating dish 41. At the same time, when the attachment plate 68 is placed on the right end portion of the attachment portion 66 while locking the flange 69 to the right edge, the portion protruding from the upper surface of the attachment portion 66 in the vertical portion 61 including the mold portion 64 is formed. Since it is attached to the attachment plate 68, it is bound and fixed by the band 72. While the flange 69 of the bottom plate 68A of the attachment plate 68 is locked to the right edge of the mounting plate 46 of the evaporating dish 41, the bottom plate 68A and the right end of the mounting portion 66 are overlapped on the mounting plate 46 and screwed. Fastened together with 71.

[0025] As described above, the evaporating heater 60 has the upper end 61 of the vertical portion 61 supported by the bracket 65, and the vertical portion 61 hangs down slightly inside the right side as viewed from the back in the evaporating dish 41. Then, the horizontal portion 62 is mounted in the evaporating dish 41 in a state where the horizontal portion 62 is applied from a right end portion on the bottom surface to a position slightly before the left end portion. A thermostat 73 is attached to a position near the tip of one lateral portion 62 in the evaporation heater 60. The thermostat 73 directly detects the temperature of the tip of the lateral portion 62 of the evaporation heater 60, and when the detected temperature at the same position reaches a predetermined temperature, the same position is released from the immersion state in the stored water, that is, It functions to stop energization of the evaporating heater 60, assuming that the remaining water level is low. The lead wire 74 of the thermostat 73 is routed from one horizontal portion 62 along the vertical portion 61 and then drawn upward through the central hole of the rubber plug 75 fitted to the mounting portion 66. Yes.

Further, a spare thermostat 76 that functions to stop energization of the evaporation heater 60 and a protective temperature fuse 77 are mounted on the mounting portion 66.

On the other hand, a shielding plate 80 is formed on the bracket 65 described above. Specifically, as shown in FIGS. 9 and 10, from the predetermined width region at the center of the left edge of the mounting portion 66, that is, from the width region that can be fitted into the upper surface opening 41A of the evaporating dish 41, A short drooping plate 79 is bent at a right angle, and the shielding plate 80 is bent from the lower edge of the drooping plate 79 so as to extend to the left. The shielding plate 80 has a length slightly more than half the length of the mounting portion 66, and is formed in a posture that is slightly lowered.

Thus, the evaporating dish 41 to which the evaporating heater 60 is attached via the bracket 65 is attached to the back surface of the refrigerator main body 10. For example, as shown in FIGS. 3 and 13, the evaporating dish 41 has a tilted posture (tilt angle of about 5 °) lifted on the left side when viewed from the back, and a drain pipe 33 is fitted into the relief recess 54 of the mounting plate 50. While escaping, it hits the back surface 10A of the refrigerator body 10. Then, the evaporating dish 41 is attached in an inclined posture by passing the screws 52 through the through holes 53 at both the left and right ends of the mounting plate 50 and tightening them into the screw holes 82 provided in the rear surface 10A.

The lead wire 63 drawn from the upper end of the evaporation heater 60, the lead wire 74 of the thermostat 73, and the like are passed through the through hole 83 opened in the rear panel 14B of the machine room 14 to the inside. It is connected to a connection part (not shown) of an electrical equipment box installed in the machine room 14.

When the evaporating dish 41 is attached as described above, as shown in FIG. 14, the bottom surface of the evaporating dish 41 becomes an upwardly inclined surface, and the horizontal portion 62 of the evaporating heater 60 is also inclined. It will be put on the bottom. At the same time, the shielding plate 80 formed by extending the left side edge force of the mounting portion 66 of the bracket 65 is arranged so as to cover the position immediately below the drain outlet 35 of the drain pipe 33 with a slightly lowered position. .

Further, as shown in FIG. 15, on the back side of the evaporating dish 41, only the mounting plate 50 and the opening edge 42A of the main body 42, and the flange 49 around the recess 55 overlapped inside the opening edge 42A are the refrigerator main body. In other words, the rear surface 10A of the refrigerator main body 10 covers the opening surface of the recess 55, and an air layer A for heat insulation is formed between the rear surface of the evaporating dish 41 and the rear surface 10A of the refrigerator main body 10. It will be formed.

[0029] The evaporating dish 41 is generated in the evaporating dish 41 at a position above the upper surface opening 41A of the evaporating dish 41, specifically, at an upper position of the region excluding the right end where the bracket 65 is attached. A duct 85 is installed to guide the rising steam.

The duct 85 is made of a metal plate, and as shown in FIG. 3, the duct 85 is formed in a flat rectangular tube shape whose upper and lower surfaces are open and whose rear view is substantially square. The upper surface opening 41A can be inserted into the left region of the position where the bracket 65 is mounted.

As shown in FIG. 13, mounting plates 87 are formed on the left and right side edges of the back plate 86 of the duct 85 so as to protrude. Each of the left and right mounting plates 87 is cut off by a predetermined length on the lower end side so as to allow the screwing portion of the mounting plate 50 of the evaporating dish 41 and the bracket 65 to escape.

Further, the lower edge of the back plate 86 is located slightly above the lower edge of the front plate 88 and is inclined upward to the left as viewed from the back at an angle that follows the inclination angle of the evaporation dish 41. An escape recess 89 is formed in the lower edge of the back plate 86 near the right end as viewed from the rear side, by which the drain pipe 33 is fitted and escaped.

[0030] The duct 85 takes a vertical posture, and as shown in FIG. 13, the drain pipe 33 protruding from the mounting plate 50 of the evaporating dish 41 is escaped by being fitted into the recessed part 89, and the lower end is the upper surface of the evaporating dish 41. The left side of the bracket 65 in the opening 41A is inserted into the left side area, and the back side is applied to the mounting plate 50 of the evaporating dish 41 and the back side 10A of the refrigerator main body 10. The lower edge of the back plate 86 is placed on the flange 49 on the back side. Then, the screw 91 is passed through the through hole 92 formed in the upper end portion of the left and right mounting plates 87 and screwed into the screw hole 93 provided in the rear surface 10A. The duct 85 is fixed. At this time, the upper surface of the duct 85 reaches a position slightly below the lower edge of the region where the exhaust port 28 is formed in the rear panel 14B of the machine room 14.

An upper surface plate 95 is attached to the upper surface opening of the duct 85. As shown in FIG. 11, the upper surface plate 95 has a size almost equal to the size of the upper surface opening of the duct 85, and is long in the front-rear direction, and a number of slits 96 are arranged along the left-right direction. Has been. A downward mounting plate 97 is bent at an acute angle at the front edge of the upper surface plate 95, and a small rising force ^ plate 98 is bent at an acute angle at the rear edge, and the rising force S is further increased. An insertion plate 99 extending obliquely upward from the upper edge of the plate 98 to the back side is formed. An insertion groove 100 into which the insertion plate 99 can be inserted is formed at a position immediately below the formation region of the exhaust port 28 in the rear panel 14B of the machine room 14.

[0032] After the insertion plate 99 is inserted into the insertion groove 100, the upper surface plate 95 is attached to the front side when the rising force S-slip plate 98 is applied to the inner surface on the far side of the upper surface opening of the duct 85. The plate 97 is overlapped with the upper edge of the surface plate 88 of the duct 85 and locked. Then, the screw is passed through the insertion holes 102 opened on both the left and right sides of the mounting plate 97 and screwed into the screw holes 103 provided at corresponding positions on the upper edge of the surface plate 88 of the duct 85. At this time, as shown in FIG. 15, the upper surface plate 95 takes an oblique posture in which the inner edge side is lowered and the inner edge enters the upper surface opening of the duct 85.

[0033] The cover 105 is made of a metal plate, and as shown in Figs. 4 and 15, the cover 105 is shaped like a square shallow dish with an open back side, It is possible to cover almost the entire duct 85. A mounting plate 106 is formed so as to project from the left and right and lower opening edges of the cover 105, and a relief recess 108 is formed in the upper surface plate 107 so as to fit the upper edge of the duct 85 and escape. Yes.

The cover 105 is applied from the rear surface 10A of the refrigerator main body 10 to the lower edge portion of the rear panel 14B while fitting the upper edge of the duct 85 into the escape recess 108, and the through holes 111 opened in the respective mounting plates 106 are opened. The screw 110 passed through is fixed by being screwed into the screw hole 112 at the corresponding position on the back surface 10A of the refrigerator main body 10. As a result, almost all of the evaporating dish 41, the duct 85, and the through holes 83 of the lead wire 63 and the like are covered with the cover 105, while the upper surface plate 95 of the dust 85 is opened upward. The [0034] Next, the operation of the present embodiment will be described.

If the defrosting operation is performed while the refrigerator is in operation, defrost water from the cooler 25 and the like is received by the drain pan 20, and then flows out from the drain pipe 30 at the back edge to the drain cylinder 32 and drain pipe 33. The drainage pipe 33 flows down from the drainage opening 35 opened on the lower surface of the distal end side of the drainage pipe 33. Since the shielding plate 80 is arranged in a downward-sloping position immediately below the drain port 35, the defrost water that has flowed down from the drain port 35, as shown by the arrow X in FIG. After that, it is collected at the bottom of the evaporating dish 41 so as to drop mainly from its tip. Since the evaporating dish 41 is mounted in a slanted posture, it is stored in a deeper form on the right side.

At the same time, the evaporation heater 60 is energized, and the stored water (defrosted water) stored in the evaporation tray 41 is heated to forcibly evaporate, and steam rises. Here, in particular, steam rising from a position corresponding to the lower side of the drain pipe 33 may flow into the cooler chamber 21 side from the drain pipe 33, but as described above, the shielding plate 80 is provided below the drain port 35. As shown by the arrow Y in Fig. 14, the steam is blocked by the shielding plate 80 and driven to the left side of the drain pipe 33, and the duct rises with the steam rising from the left side in the evaporating dish 41. Ascends in 85 and is discharged upward through slit 96 in upper surface plate 95. Even if a part of the steam wraps around the drain pipe 33 and flows into the drain port 35, the escape port 36 is opened just above the drain port 35, and the force shown in FIG. As shown by line Z, the steam flowing in from the drain port 35 continues to rise and escapes upward from the escape port 36, rises in the duct 85, and is exhausted by 96 slits. Therefore, it is possible to more reliably prevent the steam from flowing backward from the drain pipe 33.

[0036] Note that a part of the steam discharged from the upper surface of the duct 85 may be condensed by contacting the rear panel 14B of the machine room 14, and the condensed water may flow down along the rear panel 14B. However, the condensed water is received by the insertion plate 99 and flows on the upper surface plate 95 of the duct 85, flows to the back side following the inclination, and is stored again in the slit 96 and the edge force evaporating dish 41. It will be used for evaporation.

When the defrosting operation is completed, the cooling operation is resumed. At that time, the condenser fan 17A is operated, and the outside air for cooling is sucked in from the front side to cool the condenser 17 and further the compressor 16, The exhaust heat after cooling is exhausted from the exhaust port 28 of the rear panel 14B of the machine room 14 to the rear side. Therefore, the steam discharged upward from the top plate 95 of the duct 85 Is diffused to a low concentration by receiving exhaust heat, and even when the wall surface of a room such as a kitchen is in the vicinity, condensation due to a large amount of steam concentrating on the wall surface is avoided. It is done.

[0037] While the evaporating heater 60 is generating heat, the evaporating dish 41 itself is also heated to raise the temperature, but the back surface of the evaporating dish 41 has a thin peripheral wall around the recess 55 (flange 49, main body 42). Only the opening edge 42A) is applied to the back surface 10A of the refrigerator main body 10 and, in other words, is in a line contact state, and is provided with the recess 55, so that air is provided between the refrigerator main body 10 and the rear surface 10A. Since layer A is formed and functions as a heat insulation layer, it is difficult to transfer the heat from the evaporating dish 41 to the interior. As a result, the temperature in the chamber is prevented from being unnecessarily increased, and conversely, the temperature of the evaporating dish 41 is also prevented from decreasing, and the evaporation capacity of the stored water is also prevented from decreasing.

[0038] The force that the water level of the stored water gradually decreases as the evaporation progresses. Since the evaporating dish 41 is attached in a left-up position, the left end side is always in the shallowest state. Therefore, when the evaporation further proceeds, the state is gradually released from the immersed state in the stored water from the front end side of the lateral portion 62 of the evaporation heater 60, and the temperature rises rapidly. When the thermostat 73 detects the predetermined temperature, it is considered that the remaining amount of the stored water has become small, and the energization to the evaporation heater 60 is stopped. After that, evaporation of the remaining stored water is promoted by the residual heat of the evaporation heater 60 for a while.

[0039] By attaching the evaporating dish 41 in an inclined posture in this way, a result is obtained in which the position where the stored water dies out at the bottom gradually shifts from left to right. For example, the same result can be obtained when there is an inclination or a small level difference in the installation location, and the refrigerator must be installed in a slightly upward position when viewed from the rear side. Then, at the bottom closest to the highest position, more specifically, the temperature at the front end side of the lateral portion 62 of the evaporating heater 60 released from the immersed state in the stored water is first detected. Since the evaporation heater 60 is turned off, heat generation is stopped in a state where most of the lateral portions 62 are immersed in the stored water, and so-called emptying is suppressed as much as possible.

[0040] When cleaning the inside of the evaporating dish 41, the cover 105 and the duct 85 are removed, and then the screw 52 is loosened to remove the evaporating dish 41. After that, when the evaporation heater 60 is removed together with the bracket 65, the inside of the evaporating dish 41 is opened upward. Can be cleaned to every corner. The cover 105 and duct 85 can also be removed and washed in the same way.

[0041] The effects of the present embodiment are as follows. While the evaporating heater 60 is generating heat, the evaporating dish 41 itself is also heated and the temperature rises, but the back surface of the evaporating dish 41 has a thin peripheral wall around the recess 55 (flange 49, opening edge of the main body 42). 42A) is applied to the back surface 10A of the refrigerator main body 10 and is in a line contact state, and in addition to that, the above-mentioned recess 55 is provided, so that an air layer A is formed between the refrigerator main body 10 and the rear surface 10A. Since it is formed and functions as a heat insulation layer, it is difficult for the heat of the evaporating dish 41 to be transferred to the interior. As a result, the temperature inside the chamber is prevented from unnecessarily rising, and conversely, the temperature of the evaporating dish 41 can be prevented from decreasing, and the evaporation capacity of the stored water is also prevented from decreasing.

[0042] The evaporating dish 41 is formed by joining the main body 42 and the back plate 48 by welding, and the back plate 48 has a flange 49 bent at a right angle to the peripheral edge so as to form the recess 55. Since the flange 49 is fitted to the opening edge 42A on the back surface of the main body 42 and welded, the back plate 48 can be positioned more easily than a flat plate without the flange 49. The welding operation that follows immediately can be carried out smoothly, and as a result, the evaporating dish 41 can be manufactured in a short time.

It should be noted that the present invention is not limited to the embodiments described with reference to the above description and drawings, and the following embodiments are also included in the technical scope of the present invention.

(1) The concave portion provided on the back side of the evaporating dish is not limited to being provided on almost the entire surface as illustrated in the above embodiment, and an appropriate air layer can be formed even in a relatively small area, which is effective for heat insulation. Therefore, such a thing is also included in the technical scope of the present invention.

(2) The evaporation device is not limited to the rear surface of the refrigerator exemplified in the above embodiment, and may be provided on the left and right side surfaces.

(3) The heating means for evaporating the stored water is not limited to the throw-in type heater exemplified in the above embodiment, but a cord heater wired on the outer bottom surface of the evaporating dish or a hot gas pipe drawn from the refrigeration apparatus Other means may be used.

(4) Evaporated wastewater can be applied to all wastewater in the warehouse including defrost water.

Claims

The scope of the claims

[1] On the side of the storage body, there is a drainage pipe that discharges the defrosted water and other wastewater to the outside, and the drainage pipe from the drainage pipe is stored below this drainage pipe. In a cooling storage room provided with an evaporating dish that evaporates by heating means,

A cooling storage, wherein a concave portion is formed on a surface of the evaporating dish facing the side surface of the storage body so as to form an air layer between the side surface and the side surface.

[2] The concave portion is formed inside the peripheral wall by standing a thin peripheral wall at a peripheral portion of the evaporating dish facing the side surface of the storage body. Refrigerated storage as described in section 1.

[3] The evaporating dish has a box-shaped main body portion in which two surfaces of the storage main body facing the side surface and an upper surface are opened, and a side plate portion provided with a flange bent at a right angle on the surface side at the periphery. The side plate portion is fitted on the opening facing surface of the main body portion, and the flange is overlapped on the opening edge of the facing surface and welded to form a box shape with an upper surface opening. The cooling storage according to claim 2, wherein the recess is formed by an inner side of the flange.