JPH0552465A - Refrigerator - Google Patents

Abstract

PURPOSE:To obtain a refrigerator having a high freezing efficiency without increasing power consumption by discontinuing a draining after defrosting, efficiently incorporating a material to be cooled in the refrigerator and reducing the size of a condenser. CONSTITUTION:A refrigerator comprises a compressor 1, a fin condenser 15, a condenser duct 15 and a fan motor 4 arranged on the upper surface of a unit base 5, and an evaporator 6, an evaporator fan motor 7 and a drain pan 17 arranged on the lower surface of the base 5. The refrigerator has the part of a pipe of the condenser 15 arranged between the pan 17 and the evaporator 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooled refrigerator used for refrigeration or freezing, for commercial use.

[0002]

2. Description of the Related Art In recent years, there has been a strong demand from the market for refrigerators used for business purposes, such as small size, large capacity, and high efficiency.
The configuration of NS-T441DA shown in the catalog of commercial refrigerators manufactured by Matsushita Electric Industrial Co., Ltd. issued in March was common.

The above-mentioned conventional commercial refrigerator will be described below with reference to the drawings. FIG. 4 is a vertical sectional view of a conventional commercial refrigerator, and FIG. 5 is a sectional view taken along the line AA of FIG. In the figure, 1 is a compressor and 2 is a fin condenser. Reference numeral 3 denotes a condenser duct, a part of which covers the upper surface of the fin condenser 2. 4 is a fan motor, and 4a is a fan motor fixing plate which is screwed to the fan motor 4.

A unit base 5 has a compressor 1, a fin condenser 2, and a fan motor fixing plate 4a fixed with screws. Reference numeral 6 denotes an evaporator, 7 denotes an ever fan motor, and 7a denotes an ever fan motor fixing plate which is screwed to the ever fan motor 7.

A drain pan 8 closes the evaporator 6, the ever fan motor 7, and the ever fan motor fixing plate 7a. Further, the evaporator 6, the ever fan motor fixing plate 7 a, and the drain pan 8 are screwed to the lower surface of the unit base 5. 9 is a drain hose and 10 is water.

Reference numerals 11a, 11b and 11c are pipes for circulating a refrigerant through the compressor 1, the fin condenser 2 and the evaporator 6, respectively. Reference numeral 12 is a connecting hole on the upper surface and the lower surface of the unit base 5. Piping 11b, 11
The c forms a refrigerant circuit by the communication holes 12.

Reference numeral 13 denotes a main body cabinet composed of a box, and the unit base 5 and the above-mentioned components fixed to the unit base 5 with screws are built in the upper portion of the main body cabinet 13.

The unit base 5 and the main body cabinet 13 are completely fixed, and 14 is the unit base 5.
The inside of the refrigerator constituted by the main body cabinet 13 on the lower surface of FIG.

The operation of the commercial refrigerator having the above structure will be described below. First, when the commercial refrigerator is operated, the compressor 1, the fan motor 4, and the ever fan motor 7 operate. When the compressor 1 is operated, the refrigerant is compressed into high-temperature high-pressure refrigerant gas, which flows through the pipe 11a and is supplied to the fin condenser 2.

On the other hand, by the operation of the fan motor 4, the air flows between the fan condensers 2 and the condenser duct 3 toward the compressor 1. When the air passes through the fin condenser 2, heat exchange is performed between the refrigerant flowing in the fin condenser 2 and the air, and the high temperature and high pressure refrigerant is cooled and condensed into liquid, and after passing through the fin condenser 2, the low temperature and high pressure. Becomes a refrigerant liquid, flows through the pipe 11b, is sent to a pressure reducing device (not shown), and is supplied to the evaporator 6.

On the other hand, by the operation of the ever fan motor 7, the air in the refrigerator 14 passes through the evaporator 6 and the drain pan 8
It is discharged to the inside 14 through the. When the air passes through the evaporator 6, heat is exchanged with the refrigerant flowing through the evaporator 6, the refrigerant evaporates, and the latent heat of evaporation cools the air to lower the temperature of the inside 14.

The evaporated refrigerant flows through the pipe 11c, returns to the compressor 1 again, and the above cycle is repeated to perform the cooling operation.

As the cooling progresses, the water vapor contained in the air in the compartment 14 becomes frost and condenses on the surface of the evaporator 6. On the other hand, when the internal temperature reaches a certain temperature, the operation of the compressor 1, the condenser fan motor 4, the ever fan motor 7, etc. is stopped by the operation of a thermostat (not shown), etc., and at the same time, the flow of the refrigerant is stopped and it is natural or forced To start defrosting. The frost accumulated on the surface of the evaporator 6 gradually dissolves into water 10 and accumulates in the drain pan 8, further flows through the drain hose 9, and is discharged from the inside 14 to the outside of the main body cabinet 13.

At this time, the inside of the drain hose 9 is heated by a heater (not shown) or the like so that the water 10 can flow through the drain hose 9 without any problem.

When the internal temperature rises above a certain temperature, the above-described cooling operation is restarted by the movement of a thermostat (not shown).

[0016]

However, in the above-mentioned structure, the drain hose 9 necessary for discharging the defrosted water 10 must be provided outside the refrigerator, and the waste water treatment must be taken into consideration. There must be. Further, in order to prevent the drain hose 9 from freezing, it is necessary to energize the heater, which increases power consumption.

Furthermore, since the drain hose 9 must be arranged so that the water 10 can easily flow, a dead space is generated in the refrigerator, which causes a reduction in the storage of the cooling material.

In view of the above problems, the present invention provides a refrigerator equipped with an efficient cooling unit which eliminates the drain hose, eliminates the dead space, and does not require waste water treatment and a heater.

[0019]

In order to solve the above-mentioned problems, a refrigerator according to the present invention is provided with a compressor, a fin condenser, a condenser duct, a fan motor, and a unit motor provided on the upper surface of a unit base. It is also provided with an arrangement in which an evaporator provided on the lower surface, an ever fan motor, and a drain pan are provided, and a part of the fin condenser tube is piped between the drain pan and the evaporator.

[0020]

With the above-described structure, the present invention makes it possible to evaporate the water flowing out of the evaporator by means of the fin condenser pipes, eliminating the need for drainage treatment and eliminating the drain hose, eliminating dead space in the refrigerator and cooling it. Can store things efficiently.

Further, by eliminating the drain hose, the heater can be eliminated at the same time, and the power consumption can be reduced.

Further, a part of the fin condenser tube is heat-exchanged with the water accumulated in the drain pan to promote the condensation effect, and the fin condenser can be miniaturized. In addition, the evaporating action of the water accumulated in the drain pan keeps an appropriate amount of moisture in the refrigerator and prevents the cooling product from drying.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A commercial refrigerator according to an embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an office refrigerator according to an embodiment of the present invention. 1 is a vertical sectional view of a commercial refrigerator, FIG. 2 is a sectional view taken along line BB in FIG. 1, and FIG. 3 is FIG.
FIG. 3 is an enlarged cross-sectional view of a main part of the drain pan of FIG.

1, FIG. 2, and FIG. 3, the same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

15 is a miniaturized fin capacitor,
Reference numeral 16 denotes a condenser duct, a part of which covers the upper surface of the fin condenser 15. 15a is a fin condenser 1
A part of the tube 5 is a water evaporation tube. Reference numeral 17 denotes a drain pan, the inner surface of which is configured so that the water 10 after defrosting is accumulated. Reference numeral 18 is a holding plate for fixing the water evaporation tube 15a in close contact with the inner surface of the drain pan 17.

In the above-mentioned structure, as the cooling operation is started and the temperature of the inside 14 is lowered, the water vapor contained in the air inside the inside 14 is frosted and condensed on the surface of the evaporator 6.

When the inside 14 reaches a certain temperature, the compressor 1, the thermostat (not shown) or the like operates.
The operation of the condenser fan motor 4, the ever fan motor 7, etc. is stopped, the flow of the refrigerant is stopped at the same time, and defrosting is started naturally or forcibly.

The frost accumulated on the surface of the evaporator 6 gradually dissolves into water 10 and accumulates in the drain pan 17.

When the temperature of the inside 14 reaches a certain temperature or higher, the compressor 1, the condenser fan motor 4, the ever fan motor 7, etc. start to operate and the cooling operation is restarted by the operation of a thermostat (not shown).

The refrigerant compressed by the compressor 1 becomes a high-temperature and high-pressure refrigerant gas, flows through the pipe 11a, and is supplied to the miniaturized fin condenser 15.

On the other hand, by the operation of the fan motor 4, the air flows between the fin condensers 15 and the condenser duct 1
Through 6 towards the compressor 1. When air passes through the fin condenser 15, the fin condenser 1
Heat exchange is performed between the refrigerant flowing in 5 and the air, the high-temperature and high-pressure refrigerant is cooled and semi-condensed and liquefied, and after passing through the fin condenser 15, it is used for water evaporation which is a part of the pipe of the fin condenser 15. It is sent to the tube 15a.

The semi-condensed and liquefied refrigerant flowing in the water evaporation pipe 15a is completely condensed and liquefied by heat exchange with the water 10 accumulated on the inner surface of the drain pan 17, and becomes a low temperature and high pressure refrigerant liquid (not shown). Etc. and is supplied to the evaporator 6.

At this time, the heat exchange between the semi-condensed and liquefied refrigerant flowing in the water evaporation pipe 15a and the water 10 accumulated on the inner surface of the drain pan 17 causes the water 10 to evaporate and to completely evaporate with the passage of time. It is composed. Further, the inside of the refrigerator 14 can maintain an appropriate humidity due to the influence of the evaporated water 10 and can prevent the cooling material from drying.

As described above, the water 10 accumulated on the inner surface of the drain pan 17 is completely evaporated by heat exchange with the semi-condensed and liquefied refrigerant flowing in the water evaporation pipe 15a, so that the drain hose as described above is used. It can be abolished and wastewater treatment can be eliminated. Further, since the drain hose is eliminated, the dead space in the refrigerator 14 is eliminated and the cooling product can be stored efficiently.

Needless to say, the same effect can be obtained even if the water evaporation tube 15a fixed in close contact with the inner surface of the drain pan 17 is replaced with a heater.

[0037]

As described above, according to the present invention, the compressor disposed on the upper surface of the unit base, the fin condenser, the condenser duct, the fan motor, and the evaporator disposed on the lower surface of the unit base, It consists of an ever fan motor and a drain pan, and by having a part of the fin condenser tube with a pipe between the drain pan and the evaporator, the drain hose can be eliminated and wastewater treatment is unnecessary, and The dead space of is also eliminated and the cooling product can be stored efficiently.

Further, since the drain hose is abolished, the heater attached to the drain hose can be abolished, and the power consumption can be reduced.

Further, a part of the piping of the fin condenser arranged on the upper surface of the unit base is exchanged with the water accumulated in the drain pan to promote the condensation effect, so that the fin condenser can be miniaturized. In addition, the evaporation of the water accumulated in the drain pan keeps an appropriate amount of moisture in the refrigerator and prevents the cooling product from drying.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line BB in FIG.

FIG. 3 is an enlarged sectional view of an essential part of FIG. 1 of the present invention.

FIG. 4 is a sectional view of a conventional commercial refrigerator.

5 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Compressor 4 Fan Motor 5 Unit Base 6 Evaporator 7 Ever Fan Motor 15 Fin Capacitor 16 Capacitor Duct 17 Drain Pan

Claims (1)

[Claims] 1. A compressor provided on an upper surface of a unit base, a fin condenser, a condenser duct, a fan motor, an evaporator provided on a lower surface of the unit base, an ever fan motor, and a drain pan. A refrigerator characterized in that a part of a tube of the fin condenser is provided between the drain pan and the evaporator.