JPH09243234A - Defrosted drain evaporator in cooling storage chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure and effectually achieve evaporation of defrosted drain. SOLUTION: A machine chamber for containing a cooling unit freely to take out is provided on the side of a body 1. An outfall 66 for defrosted drain is provided in a bottom surface of a side wall 1a located between the body 1 and the machine chamber. An outfall is provided in a bottom surface of the machine chamber which is capable of exhausting part of warm exhaust after being heat-exchanged with a condenser. An evaporator unit 72 is mounted so as to cover the outfall 66 and the exhaust hole. For the unit 72 an evaporation plate 73 having a heater 78 is contained in a cover 74, and a reception pan 75 is contained from an opening 73a provided in one side of the plate 73. An exhaust duct 87 is formed over the opening 73a in the plate 73 from the outfall in the bottom surface of the machine chamber. Warm exhaust from the machine chamber flows through the exhaust duct 87 and is blown off to the defrosted drain accumulated in the reception pan 75 whereby evaporation is promoted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus used for evaporating defrost drainage in a cold storage.

[0002]

2. Description of the Related Art Conventionally, as a refrigerator provided with an evaporation device of this type, a refrigerator described in Japanese Patent Laid-Open No. 6-129755 is known. In this refrigerator, a machine room for storing a cooling unit is provided on the side of a refrigerating room for storing foodstuffs, an evaporating dish is attached to the outer bottom surface of the refrigerating room, and a drain pipe for defrost drainage drawn from the machine room. Is provided so as to face the evaporation tray, and an exhaust duct extending from the machine room to the evaporation tray is provided along the outer bottom surface of the refrigerating room. Then, the defrosting wastewater generated by the defrosting operation is stored in the evaporation tray through the drain pipe, and when the cooling operation is started, the warm exhaust air after heat exchange with the condenser is directed to the evaporation tray through the exhaust duct. It is sprayed on the defrosting wastewater, thereby promoting evaporation.

[0003]

However, in the conventional apparatus, the evaporation tray is provided at a position separated from the machine room, and it is necessary to install a special exhaust duct in order to utilize the warm exhaust air from the machine room. For this reason, the structure becomes complicated and it takes time to manufacture, and since the warm exhaust causes a considerable temperature decrease while passing through a long exhaust duct, it is not always possible to efficiently promote the evaporation. The present invention has been completed in view of the above points, and an object thereof is to provide an evaporator having a simple structure and capable of efficiently evaporating defrosting waste water.

[0004]

As a means for achieving the above object, the present invention provides a cooling storage cabinet provided with a machine room for storing a cooling unit on the side of a storage room for storing stored items. A device used for evaporating frost drainage, wherein an exhaust port for discharging warm exhaust gas after heat exchange with a condenser is formed on the bottom surface of the machine room, and in the vicinity of the exhaust port. A drain outlet for discharging defrost drainage is formed,
An evaporation plate having a saucer for receiving the defrost drainage is attached so as to cover a region extending from the exhaust port to the drain port, and an outlet is opened on a side surface of the evaporation plate, so that the exhaust port is removed from the exhaust port. The feature is that an exhaust duct for warm exhaust reaching the outlet is configured.

[0005]

When the defrosting operation is performed, the defrosting drainage falls from the drain port to the tray and is stored. When switching to cooling operation, the warm exhaust air after heat exchange with the condenser is exhausted through the exhaust duct extending from the exhaust port to the outlet of the evaporation plate, during which the defrost drainage in the saucer is heated. Evaporation is accelerated. That is, according to the present invention, since the evaporation plate for accommodating the tray is used as it is to form the exhaust duct for warm exhaust, the structure can be simplified without providing a special duct, and the machine Immediately after leaving the room, the warm exhaust gas in a state where the temperature is not lowered can be applied to the defrost drainage, so that the effect of efficiently promoting evaporation can be obtained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 3, reference numeral 1 denotes a main body of a refrigerator, which is formed in a horizontally long box shape opened on the front surface, and has a refrigerator compartment 2 in which food is stored (see FIG. 5). The front opening is equipped with a double door type door 3, and legs 4 are provided at the four corners of the bottom surface.
Supported by

A cooling unit 6 is removably housed on the left side when viewed from the front of the main body 1. In detail, on the upper side of the left side portion of the main body 1, a rectangular parallelepiped bulging portion 8 is formed so as to project outward and to be retracted inward by a predetermined dimension from the front surface and the rear surface of the main body 1. Is formed, and the inside is a cooling chamber 9. As shown in FIG. 5, the inside of the wall constituting the main body 1 including the bulging portion 8 is filled with a heat insulating material 7, so that heat insulation to the outside is ensured. An entrance 10 is formed in a front wall of the cooling chamber 9, and a storage space 11 is formed on a lower surface side of the cooling chamber 9.
With this storage space 11 and the cooling chamber 9, the compressor 2
A cooling unit 6 including 0, a condenser 23, a cooler (evaporator) 27, and the like is housed in a retractable manner.

In the storage space 11, one side edge of a receiving plate 13 having a shallow dish shape is fixed to a lower edge of a side surface of the main body 1. Further, a pair of support frames 14 are attached to the front and rear ends of the lower edge of the side surface of the bulging portion 8 so as to hang down, and the other side edge of the receiving plate 13 is fixed to the lower end of each support frame 14, Thus, the receiving plate 13 is supported. The substrate 15 of the cooling unit 6 can be placed on the receiving plate 13. This board 15 is formed in a U-shape with both left and right edges bent, and is pushed into the receiving plate 13 from the front side, and a protrusion provided on the front edge of the board 15 (right edge in FIG. 3). The contact plate 17 is the receiving plate 13
Screw receiving piece 1 formed at the center of the front edge of
8 stops the pushing, and the abutment plate 17
And the screw receiving piece 18 are fixed by screwing.

[0009] The cooling unit 6 is divided into a part accommodated in the storage space 11 and a part accommodated in the cooling chamber 9, and these are arranged vertically on the substrate 15. As a part to be stored in the storage space 11, a compressor 20 is provided on the back side, and a motor 22 is provided on the front side.
Fan 21 driven by the condenser, the condenser 2 at the front side
3 are arranged respectively. On the upper surface of the condenser 23, a cooling chamber lid 25 for closing the entrance 10 of the cooling chamber 9 is fixed via an L-shaped bracket 26. A cooler 27 that can be inserted into and removed from the cooling chamber 9 is attached to the back side of the cooling chamber lid 25 via a bracket 28. This cooler 27 is housed and provided in a casing 27a, and as shown in FIG. 5, the bottom surface of the casing 27a and the upper part on the surface on the refrigerating chamber 2 side are open, and an air intake 29 and an air intake 29 are respectively provided. The air outlet 30 is an air outlet 30, and an in-compartment fan 31 is attached to the front surface of the air outlet 30.

As shown in FIG. 3, the outlet of the compressor 20 and the inlet of the condenser 23 are connected by a pipe 33, and the condenser 23
And the inlet of the cooler 27 are connected by a pipe 34,
Further, the outlet of the cooler 27 and the inlet of the compressor 20 are connected to the pipe 3
They are connected at 5, which constitutes a cooling cycle. Among the above-mentioned pipes, the pipes 34 and 35 which are put into and taken out of the cooler 27 are encased together in the middle and are covered with a heat insulating material tube, and are drawn out from the left edge portion of the cooling chamber lid 25 to the side. Have been. The portions of the two pipes 34, 35 that are drawn out from the cooling chamber lid 25 are semi-circular holders 3.
While being fixed by 7, a concave portion 38 into which the above-mentioned pressing tool 37 is fitted is formed at the side edge of the inlet / outlet 10 of the cooling chamber 9.

A heat insulating packing 39 including the above-mentioned recess 38 is attached to the periphery of the entrance / exit 10 in the front wall of the cooling chamber 9. A pair of mounting bolts 41 project from both upper and lower edges of the front wall, while the cooling chamber lid 25 is provided with insertion holes 42 for the mounting bolts 41. Cooling chamber lid 25
An electrical box 43 is attached to the front side of the electronic component. Then, as described above, the cooling unit 6 connects the substrate 15 to the receiving plate 1.
3 and the cooler 27 is
0 and is inserted into the cooling chamber 9. During the pushing, the mounting bolt 41 is inserted through the insertion hole 42 of the cooling chamber lid 25 and is pushed to a predetermined position.
The cooling chamber lid 25 abuts against the front wall of the cooling chamber 9 via the heat insulating packing 39 while the cooling chamber lid 2
When a nut (not shown) is screwed into the projecting end of the mounting bolt 41 penetrating through the nut 5 and tightened, the cooling chamber lid 25 closes the entrance 10 of the cooling chamber 9 in an airtight manner. The substrate 15 is fixed to the receiving plate 13 in the same manner as described above.
Is stored in the cooling chamber 9, while the compressor 20, the condenser fan 21 and the condenser 23 are stored in the storage space 11.

On the other hand, as shown in FIG. 5, a cold air guide plate 45 is provided between the cooling chamber 9 and the refrigerating chamber 2 in the refrigerator. The guide plate 45 is provided so as to extend obliquely forward from a position below the internal fan 31 to a position slightly below the ceiling surface of the refrigerator compartment 2. A return plate 46 is provided from the lower surface of the guide plate 45 to a position slightly above the bottom surface of the refrigerating chamber 2. The return plate 46 and the refrigerating chamber 2 are provided.
A predetermined space is provided between the side wall 1a of the main body 1 that separates the storage space 11 from the storage space 11, and a return path 47 reaching the intake 29 of the cooler 27 is formed therein.

As shown in FIG. 3, a top plate 49 is stretched on the upper surface of the main body 1 including the bulging portion 8. FIG.
As shown in FIG. 3, a side panel 50 is stretched outside the support frame 14 so as to cover the sides of the cooling chamber 9 and the storage space 11, and a rear panel 51 is stretched on the rear surface side. Further, a front panel 52 is mounted on the front side of the cooling chamber 9 and the storage space 11 via a hinge 53 so that the front panel 52 can swing and open and close. At the lower side of the front panel 52, a plurality of outside air intake ports 55
Is opened over the entire surface, and an exhaust port 56 is formed in a portion corresponding to a space between the side wall of the cooling chamber 9 and the side panel 50 on the upper side. Also,
Exhaust ports 56 are also formed in the side panel 50 and the rear panel 51.

Therefore, when the cooling unit 6 is driven, as shown by the arrow in FIG. 5, the air in the refrigerating chamber 2 passes through the return path 47 and is sucked from the inlet 29 on the lower surface side of the cooler 27. After being converted into cool air, it is blown from the internal fan 31 through the upper surface of the guide plate 45 to the ceiling surface side of the refrigerating compartment 2, that is, the cool air is circulated and supplied to the refrigerating compartment 2. Also,
By driving the condenser fan 21, as shown by the arrow in FIG. 6, outside air is sucked into the storage space 11 from the intake port 55 of the front panel 52, cools the condenser 23, and heat-exchanged warm exhaust air is obtained. The air is exhausted to the outside from each of the exhaust ports 56 described above.

In this embodiment, a device for evaporating and removing the defrost drainage generated by the defrosting operation is provided. First, as a defrosting means, as shown in FIG.
In the lower position of the surface of the refrigerating chamber 2 side of 7, glass tube heater 5
8 is accommodated and provided in the cover 59. The cover 59 is provided with an in-compartment thermostat 60 which is used to detect the in-compartment temperature and control when the defrosting operation ends.

As a drainage path for defrosting drainage, as shown in FIGS. 5 and 7, a drainage port 62 is provided on the bottom surface of the cooling chamber 9 on the back side. The drain pipe 63 connected to the drain port 62 is connected to the rear panel 51 as shown in FIG.
And is once projected to the outside and is connected to the connection port 64 provided on the side wall 1a on the inner surface side of the main body 1. Then, as shown in FIG. 7, a drain pipe 65 running obliquely downward and forward from the connection port 64 is embedded in the side wall 1a, and the tip of the drain pipe 65 is the final drainage. The mouth 66 is provided so as to project downward from the bottom surface. That is, the cooler 2 is heated by the heater 58.
The defrost drainage dropped from 7 is the drainage port 6 on the bottom surface of the cooling chamber 9.
2 through the pipe 63, and the drain pipe 6 in the side wall 1a
It is designed to be drained from the drainage port 66 through 5.

Further, a large number of exhaust ports 68 are opened in the receiving plate 13 installed in the storage space 11. As shown in FIG. 8, each exhaust port 68 is formed in an elongated slit shape in the front-rear direction (up-down direction in the same figure), and a plurality of the exhaust ports 68 are divided into five rows in the front-rear direction at substantially the center of the receiving plate 13. Are aligned and formed. The exhaust port 68 in the frontmost row (the top row in FIG. 8) is the drain port 62 described above.
It is formed to be right next to the. A large number of exhaust ports 69 are also formed in the substrate 15 of the cooling unit 6. Each exhaust port 69 is formed in an elongated slit shape in the left-right direction, and is formed in two rows in the left-right direction in an area on the back side of the installation position of the compressor 20 from the installation position of the compressor 20. ing. The compressor 20 is shown in FIG.
As also shown, the bottom surface of the bracket 70 is installed above the substrate 15 via the bracket 70. That is, the two exhaust ports 68, 69 are oriented so that the directions thereof are crossed with each other, and the exhaust port 69 of the substrate 15 is the exhaust port 6 of the receiving plate 13.
It is arranged above the exhaust ports 68 in the three rows on the rear side of 8 so as to overlap.

Next, the evaporator unit 72 will be described. As shown in FIGS. 9 and 10, this unit 72 has a structure in which an evaporation plate 73 is housed and fixed in a plate cover 74, and a pan 75 is housed in the evaporation plate 73. Specifically, the evaporation plate 73 is formed in a shallow box shape with an open upper surface, one side surface in the length direction (the surface on the far side in FIG. 9) is opened, and the evaporation plate 73 is formed on the upper ends of the left and right side plates 76. A pair of mounting plates 77 are formed so as to project outward. This evaporation plate 7
A heater 78 for evaporation is attached to the outer bottom surface of 3 so as to be stretched over almost the entire surface. Also,
On the surface of the evaporation plate 73 on the front side in FIG. 9, a bimetal thermostat 79 for temperature adjustment and a fuse 80 for preventing an excessive temperature rise are attached, and predetermined wiring is provided.

One plate cover 74 is for accommodating the evaporation plate 73 described above, and is formed by the left and right side plates 82 standing up and a storage part 83 is provided at the front end. Has been. The end face on the other side is open. That is, the evaporation plate 73
The side plate 76 of the plate cover 74 is fitted inside the side plate 82 of the plate cover 74, and the side plates 76 and 82 are fastened together by the screws 82a, so that the evaporation plate 73 is housed in the plate cover 74 as shown in FIG. Is fixed.
A heater 78 attached to the bottom of the evaporation plate 73
11 is stored in a state that it is slightly floating from the bottom surface of the plate cover 74, as shown in FIG.
9, the fuse 80, other wirings, and the like are housed in the housing portion 83, and the power cord 85 is pulled out from the side surface side of the housing portion 83. Then, in the evaporation plate 73, a tray 7 for receiving and storing defrost drainage
5 is housed so that it can be taken in and out from the opening 73a side.

As shown in FIG. 11, in the evaporator unit 72, the main body 1 extends from the lower surface of the receiving plate 13 of the storage space 11 over the side wall 1a in a posture in which the opening 73a of the evaporation plate 73 faces the right side. Is provided at a position that reaches the bottom of the. More specifically, as shown in FIG. 8, the end of the evaporation plate 73 on the side closer to the storage portion 83 has an exhaust port 68 opened in the receiving plate 13 of the storage space 11 described above.
Cover most of the drainage port 66 and the drainage port 66
3 is arranged at a position facing the central portion of the side edge on the front side as viewed from the front of 3, and both mounting plates 77 of the evaporation plate 73 are fixed to the receiving plate 13 and the bottom surface of the main body 1 with screws 77a (see FIG. 7). It is attached by doing. By the above,
From the exhaust port 69 of the substrate 15 of the cooling unit 6 to the receiving plate 13
An exhaust duct 87 for warm exhaust that passes through the exhaust port 68, further passes through the evaporation plate 73, and reaches the opening 73a. Further, the power cord 85 is pulled in on the back side of the front panel 52 and connected to the outlet of the electrical equipment box 43.

The present embodiment has the above structure,
Subsequently, the operation will be described. When the defrosting operation is performed, as described above, the heater 58 provided in the cooler 27 generates heat, so that the defrost drainage drops from the cooler 27, and the defrost drainage is the drainage on the bottom surface of the cooling chamber 9. The evaporator unit 72 is discharged from the outlet 62 through the pipe 63, the drain pipe 65 in the side wall 1a, and the drain port 66 on the bottom surface of the main body 1.
It is stored in the tray 75.

The defrost drainage stored in the tray 75 is heated by the heater 78 and gradually evaporated. In addition, when the cooling operation is started, a part of the warm exhaust gas that has been heat-exchanged in the condenser 23 passes through the exhaust duct 87 described above, and, if repeated, from the exhaust port 69 of the substrate 15 of the cooling unit 6 to the receiving plate 13. Through the exhaust port 68, and further as shown by the arrow in FIG. In this way, the warm exhaust gas is used for the evaporation plate 73.
While passing through the inside, evaporation is promoted to heat the defrost drainage stored in the tray 75, and steam is also effectively discharged to the outside with the flow of warm exhaust.

As described above, according to this embodiment, the tray 7
Since the evaporation plate 73 for accommodating 5 is used as it is to configure the exhaust duct 87 for warm exhaust, it is not necessary to provide a special duct and the structure can be simplified. Immediately after that, you can apply the warm exhaust gas in the state where the temperature has not dropped to the defrost drainage,
Evaporation can be efficiently promoted.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the above-described embodiment, only the defrost drainage water is evaporated, but it is also possible to receive drainage drainage in the refrigerator with a saucer and evaporate it in the same manner. (2) In the above embodiment, the heater provided in the evaporator unit is always energized, but it may be energized only during the cooling operation, and a water level sensor is provided in the tray. Then, the electricity may be supplied depending on the water level of the accumulated defrost drainage. (3) The present invention can be similarly applied to a cooling storage of a type in which the cooling unit is not a pull-out type and is fixedly provided in a machine room provided on the side of the refrigerating room.

[Brief description of drawings]

FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a perspective view of a state before a cooling unit is housed.

FIG. 4 is a perspective view of the cooling unit as viewed from the back side.

FIG. 5 is a cross-sectional view showing the inside of the refrigerator.

FIG. 6 is a partially cutaway perspective view showing a flow of warm exhaust air.

FIG. 7 is a side view of the main body for showing a drainage path.

FIG. 8 is a partially cutaway plan view showing a mounting position of an evaporator unit.

FIG. 9 is an exploded perspective view of an evaporator unit.

FIG. 10 is a perspective view of an assembled evaporator unit and a tray.

FIG. 11 is a partially cutaway front view showing an exhaust duct.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body 1a ... Side wall 2 ... Refrigerating room 6 ... Cooling unit 9 ... Cooling room 11 ... Storage space 13 ... Receiving plate 1
5 ... Substrate 21 ... Condenser fan 23 ... Condenser 66 ... Drainage port 68 ... Exhaust port (of receiving plate 13) 69 ... (Substrate 1
5) Exhaust port 72 ... Evaporator unit 73 ... Evaporation plate 73
a ... Opening (exit) 75 ... Receiving tray 78 ... Heater 87
…Exhaust duct

Claims (1)

[Claims] 1. A device for use in evaporating defrost drainage in a cooling storage cabinet having a machine room for storing a cooling unit on the side of a storage room for storing stored items, the bottom surface of the machine room. Has an exhaust port for discharging warm exhaust gas after heat exchange with the condenser, and a drain port for discharging defrost drainage is formed near the exhaust port to receive the defrost drainage. The evaporation plate having a saucer is attached so as to cover the region extending from the exhaust port to the drain port, and the outlet is opened on the side surface of the evaporation plate, so that the warm exhaust gas reaches from the exhaust port to the outlet. The defrosting drainage evaporation device in a cooling storage, characterized in that the exhaust duct of the above is configured.