JPH10267508A - Electric refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric refrigerator alleviated in the freezing of the hole of a drain pan and the drain hose of it, and if frozen, ice is melted quickly so that water leakage from the drain pan can be prevented securely with comparatively simple structure. SOLUTION: The refrigerator includes a compressor 2, a condenser 3 and an evaporator 5 and cools the inside of a refrigerator main body 1 based on a refrigerating cycle utilizing the latent heat of vaporization of refrigerant. In this case, the freezing of the defrosting drain is prevented by expanding the heat receiving area of heat from a heat radiating pipe 3a arranging a drain pan 7 receiving the defrosting drain to the lower part of the evaporator 5, connecting between the drain pan 7 and the evaporation pan 9 arranged near the compressor outside the compartment with a drain hose 8 and arranging the drain hose 8 along the heat radiating pipe 3a of the condenser 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric refrigerator, and more particularly to a drainage mechanism for drainage (defrosting drain) generated by defrosting of an evaporator in a compressor type refrigerator including a compressor, a condenser, a capillary tube, an evaporator and the like. Regarding improvement.

[0002]

2. Description of the Related Art Generally, an electric refrigerator includes a compressor,
A compressor-type refrigerator using a compressor cycle composed of a condenser, a capillary tube, and an evaporator, and an absorption-type refrigerator using a refrigeration cycle that evaporates and absorbs a refrigerant by a heater such as a gas combustion or electric heater. Representative, but
The latter is used in hotel rooms because of its low operating noise and extremely quiet, and the former compressor-type refrigerator is excellent in refrigeration capacity for home use.
Widely used as commercial refrigerators.

This compressor-type refrigerator is, for example, shown in FIGS.
It is configured as shown in FIG. In the figure, reference numeral 1 denotes a refrigerator body, in which a compressor 2, a condenser 3,
A capillary tube 4, an evaporator 5, and the like are arranged. In particular, an electric heater 6 for defrosting is disposed near the evaporator 5 disposed in the refrigerator, and a drain plate 7 for receiving a defrost drain is disposed below the evaporator 5. A drain hole is formed in the bottom of the drain plate 7, and a drain hose 8 for draining the defrost drain is connected to the hole. The lower end of the drain hose 8 is led out of the refrigerator,
Evaporating dish 9 fixed on top of compressor 2 arranged outside the refrigerator
It is connected to.

[0004] This compressor-type refrigerator operates, for example, as follows. First, the low-temperature and low-pressure gas refrigerant evaporated by the evaporator 5 and removing heat from the inside of the refrigerator is sucked and compressed by the compressor 2 to be converted into a high-temperature and high-pressure gas refrigerant and sent to the condenser 3.
While passing through the condenser 3, heat is dissipated to the outside air to become a normal-temperature, high-pressure liquid refrigerant. In addition, this condenser 3 is usually
The pipes are arranged in a meandering manner, and the pipes function as heat radiation pipes 3a. Next, the liquid refrigerant at normal temperature and high pressure reaches the evaporator 5 through the capillary tube 4. At this time, the pressure drops to a certain value due to the flow resistance of the capillary tube 4, and a part of the refrigerant starts to evaporate and deprives the heat of the inside of the refrigerator.
It becomes a low-temperature, low-pressure gas state, and is completely evaporated in the evaporator 5 to absorb heat in the refrigerator. By repeating this refrigeration cycle, the inside of the refrigerator is cooled to a desired temperature.

[0005]

According to the compressor-type refrigerator, since the refrigerator has an excellent refrigerating capacity, a plurality of freezing rooms, a refrigerator room, a vegetable room, a slightly freezing temperature room, etc. Although it is possible to control each cooling chamber to an appropriate temperature even if the cooling chambers are provided, there are the following problems.

That is, usually, a cooler such as a roll bond type or a cross fin type is applied to the evaporator 5 so as to enhance the cooling capacity of the inside of the refrigerator. The surface temperature of the vessel is -20 ° C
In order to cool below, frost and ice will adhere to the surface. In such a state, not only does the efficiency of heat exchange with air decrease, the cooling performance decreases, but also it becomes difficult to cool each cooling chamber to an appropriate temperature.

Therefore, in order to solve such a problem, in a conventional electric refrigerator, for example, as shown in FIG. 3, an electric heater 6 is provided near the evaporator 5 and a drain pan 7 is provided below the evaporator 5. Are arranged, and the drain hose 8 connects the drain tray 7 and the evaporating tray 9 with each other.

[0008] Defrosting by this configuration is performed as follows. First, when the evaporator 5 is heated by energizing the electric heater 6 at regular intervals using a timer or the like, the frost or ice in the cooler is melted and dropped on the drain plate 7 as a defrost drain.
The refrigeration cycle is stopped during the defrosting. Then, the drain accumulated in the drain tray 7 is drained to the evaporating tray 9 through the drain hose 8 and stored. Next, when the energization of the electric heater 6 is stopped due to time-up, the compressor 2 starts operating, and the refrigeration cycle resumes again. At this time, since the compressor 2 generates heat, the evaporating dish 9 disposed above the compressor 2 is also heated.
For this reason, the drain stored in the evaporating dish 9 is heated, evaporated and dissipated. Therefore, the cooling capacity of the evaporator 5 can always be maintained at a certain level or more, and the above-mentioned problem can be solved.

However, in the defrost cycle, the defrost drain dropped on the drain plate 7 may be difficult to be drained to the evaporating plate 9 through the drain hose 8. Water may leak into the cooling room. This is because the holes in the drain pan 7 and the drain pan 7
It is considered that the drain hose portion 8a close to the drain is blocked by freezing of the defrost drain. Once such a part is frozen, the electric heater 6 does not completely thaw it even during the defrost cycle, and the above-mentioned water leakage accident occurs, which causes a new problem of adversely affecting the stored items. Is what happens.

Therefore, an object of the present invention is to alleviate the freezing of the holes and the drain hose of the drain dish with a relatively simple configuration, and even if it freezes, it quickly thaws and ensures that water leaks from the drain dish. It is an object of the present invention to provide an electric refrigerator which can be prevented.

[0011]

SUMMARY OF THE INVENTION Accordingly, in order to achieve the above-mentioned object, the present invention provides a refrigerator main body based on a refrigeration cycle including a compressor, a condenser, and an evaporator and utilizing the latent heat of evaporation of a refrigerant. In an electric refrigerator configured to cool the inside of a refrigerator, a drain plate receiving a defrost drain is disposed below the evaporator, and a drain hose is provided between the drain plate and an evaporation plate provided outside the refrigerator. It is characterized in that the drain hoses are connected to each other and the drain hose is arranged so that the heat receiving area from the radiating pipe of the condenser is enlarged.

A second invention of the present invention includes a compressor, a condenser, and an evaporator, and is configured to cool the inside of the refrigerator main body based on a refrigeration cycle utilizing the latent heat of evaporation of the refrigerant. In the electric refrigerator, a drain plate for receiving a defrost drain is disposed below the evaporator, and a drain hose is connected between the drain plate and an evaporating plate provided near the compressor outside the refrigerator, and a drain hose is provided. Are arranged along the heat radiating pipe of the condenser to increase the heat receiving area from the heat radiating pipe. Furthermore, a third invention of the present invention is characterized in that a drain hose located in a portion close to the drain pan is arranged along a heat radiating pipe of a condenser to increase a heat receiving area from the heat radiating pipe, A fourth invention is characterized in that a downward inclined portion is formed in a part of the heat radiation pipe of the condenser, and a drain hose is arranged along the inclined portion.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the electric refrigerator according to the present invention will be described with reference to FIG. still,
The same parts as those in the conventional example shown in FIGS. 3 and 4 are denoted by the same reference numerals, and detailed description thereof will be omitted. A feature of this embodiment is that a part 8b of a drain hose 8 connecting between a drain plate 7 and an evaporating plate 9 provided near a compressor outside the refrigerator is attached to a heat radiating pipe 3a of the condenser 3. And the heat receiving area from the heat radiating pipe 3a is enlarged.

According to this embodiment, during the refrigeration cycle, the heat radiated from the heat radiating pipe 3a of the condenser 3 is transmitted to the portion 8b of the drain hose 8, and the drain pan 7
Is also transmitted to the portion 8a and the drain plate 7 close to. For this reason, even if the drain accumulated in the drain tray 7 is exposed to the cool air from the evaporator 5, it is difficult to freeze. Even if it is frozen, since it is thawed by the heat conducted from the heat radiating pipe 3a of the condenser 3 to the drain hose 8 during the refrigeration cycle, the defrosting drain is not unnecessarily stored in the drain plate 7, and therefore, Water leakage from the drain plate 7 can be reliably prevented.

FIG. 2 shows a second embodiment of the present invention, which is basically the same as the embodiment shown in FIG. The difference is that a part of the heat radiation pipe of the condenser 3 is provided with a downward inclined portion 3b, and the drain hose 8 is arranged along the inclined portion 3b. This inclined portion 3b
Is desirably set to, for example, 5 degrees or more.

According to this embodiment, the drain hose 8b disposed along the inclined portion 3b of the condenser 3 also has a downward slope similarly to the inclined portion 3b. At 8b, the fluid flows smoothly without staying. Therefore, freezing in the drain hose can be more reliably prevented.

The present invention is not limited to the above-described embodiment. For example, the drain hole of the drain plate may be provided at the center of the drain plate, or may be provided at the side. Further, the evaporating dish can be arranged in a non-installed portion of the compressor. Further, in the present invention, the meaning of the electric refrigerator includes not only a refrigerator but also a combination of a refrigerator and a freezer.

[0018]

As described above, according to the present invention, the drain hose is arranged so that the heat receiving area from the heat radiating pipe is enlarged with respect to the heat radiating pipe of the condenser.
During the refrigeration cycle, heat radiated from the heat radiating pipe of the condenser is transmitted to the drain hose and the drain plate. Accordingly, it is possible to prevent the defrosting drain from being frozen in the drain pan and the drain hose near the drain pan, and it is possible to reliably prevent the defrosting drain from leaking due to overflow from the drain pan.

In particular, if a part of the drain hose is arranged along the heat radiating pipe of the condenser, the heat receiving area of the drain hose with respect to the heat radiating pipe can be further increased. The defrosting of the drain can be prevented more reliably.

Further, if a downwardly inclined portion is provided in the heat radiating pipe of the condenser, and a drain hose is disposed along the inclined portion, the drain hose portion also becomes downwardly inclined similarly to the inclined portion. The defrost drain can flow smoothly without staying in the drain hose. Therefore, freezing in the drain hose can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a cooling-related portion showing a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a main part of a cooling-related portion showing a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a cooling-related portion of a conventional example.

FIG. 4 is a schematic configuration diagram for explaining a conventional refrigeration cycle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Compressor 3 Condenser 3a Heat radiation pipe 3b Downward slope part 4 Capillary tube 5 Evaporator 6 Electric heater 7 Drain plate 8 Drain hose 8a Part close to a drain plate 8b Part along heat radiation pipe 9 Evaporation plate

Claims (4)

[Claims] 1. An electric refrigerator including a compressor, a condenser, and an evaporator, configured to cool the inside of a refrigerator main body based on a refrigeration cycle utilizing latent heat of evaporation of a refrigerant. A drain plate that receives the defrost drain is placed below, and a drain hose is connected between the drain plate and the evaporating plate provided outside the refrigerator, and the heat receiving area of the drain hose from the radiation pipe of the condenser is expanded. An electric refrigerator characterized by being arranged in such a manner that: 2. An electric refrigerator comprising a compressor, a condenser, and an evaporator, wherein the interior of a refrigerator body is cooled based on a refrigeration cycle utilizing latent heat of evaporation of a refrigerant. A drain tray for receiving the defrost drain is arranged below, and a drain hose is connected between the drain tray and an evaporating tray provided near the compressor outside the refrigerator, and the drain hose is attached to a heat radiation pipe of the condenser. An electric refrigerator characterized in that the heat receiving area from the heat radiating pipe is increased by arranging it in a refrigerator. 3. The electric device according to claim 2, wherein a drain hose located near the drain pan is arranged along a heat radiating pipe of the condenser to increase a heat receiving area from the heat radiating pipe. refrigerator. 4. The electric refrigerator according to claim 2, wherein a downwardly inclined portion is formed in a part of the heat radiation pipe of the condenser, and a drain hose is attached to the inclined portion.