JPH0741373U - Electric refrigerator - Google Patents

Abstract

(57) [Summary] [Purpose] In an electric refrigerator, defrost water flowing down from the evaporator side during defrosting operation is evaporated more quickly and surely. [Structure] A machine room 16 is located at the lower rear of the heat insulating box 1 of the electric refrigerator. A first evaporation tray 18 for evaporating a certain amount of defrosting water 21 into the machine room 16 by using the heat of the compressor 17, and defrosting water overflowing from the first evaporation tray 18 are supplied to a condenser pipe 19
And a second evaporating dish 20 which evaporates using the heat of.
The condenser pipe 19 is covered with a water-resistant heat-shrinkable tube 24 in order to prevent erosion due to defrost water.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric refrigerator, and more particularly to a means for quickly and surely evaporating defrost water flowing down from the evaporator side during defrosting operation.

[0002]

[Prior art]

 The electric refrigerator has, for example, a freezing compartment 2, a refrigerating compartment 3 and a vegetable compartment 4 as shown in FIG. 1, and cold air generated by an evaporator 8 arranged behind the freezing compartment 2 is blown by a blower fan 9 Is supplied to the freezer compartment 2 by the cold air distribution chamber 10, and is supplied to the refrigerating compartment 3 and the vegetable compartment 4 via the cold air duct 11 connected to the cold air distributing compartment 10. It is designed to be returned to the evaporator 8 through cold air return passages 12a and 12b formed in a partition wall 12 between the refrigerating compartments 3. By the way, the temperature of the evaporator 8 drops to about −30 ° C. while the compressor 17 is operating, while the temperature of the cool air returned to the evaporator 8 via the cool air return passage 12b rises to about 5 to 7 ° C. However, frost is generated on the surface of the evaporator 8 due to the presence of moisture and dew condensation occurs. The amount of frost attached increases with the passage of the operating time of the compressor 17, and along with this, the heat exchange performance of the evaporator 8 decreases. Therefore, the defrost heater 14 arranged at the bottom of the evaporator 8 is turned on to perform the defrosting operation. At that time, the defrosting water flowing down from the evaporator 8 is provided on the partition wall 12. After being received by the exposed dew tray (gutter) 13, it is led through the lower drainage pipe 15 to the machine room side formed behind the lower part of the heat insulating box 1 and evaporated by the evaporation means. For this evaporation means, for example, as shown in FIG. 1, an evaporation dish is arranged above the compressor 17 so that the heat of the compressor 17 is used to accelerate the evaporation. There are those with an evaporating dish placed on top, those with a condenser pipe meandering inside the evaporating dish, and those with an evaporating area increased by standing a water immersion plate inside the evaporating dish.

[0003]

[Problems to be solved by the device]

 However, just placing an evaporating dish on top of the compressor is not enough for evaporating capacity. In addition, the one in which the evaporating dish is arranged on the top of the condenser pipe has a disadvantage that a dead space is generated at the bottom of the heat insulating box, and even if the condenser pipe is meandered inside the evaporating dish, the evaporating capacity is not sufficient. In addition, since the condenser pipe is always immersed in defrost water, pinholes may form due to erosion, which may lead to refrigerant leakage.If a water immersion plate is used, the evaporation capacity may be reduced due to clogging of the water immersion plate. There are drawbacks to any means, such as conceivable. Therefore, it is an object of the present invention to provide an electric refrigerator provided with an evaporation means that can surely and quickly evaporate defrost water flowing down from the evaporator side.

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above problems, and is a machine that receives defrosting water that flows down from the evaporator side during defrosting operation at a dew tray and is formed under the heat-insulating box through a drain pipe. In what is led to the chamber side and evaporated by the evaporation means, as the evaporation means, a first evaporation dish that evaporates a certain amount by using the heat of the compressor, and defrosting that overflows from the first evaporation dish It was decided to provide a second evaporating dish that evaporates water using the heat of the condenser pipe.

[0005]

[Action]

 With the above configuration, a certain amount of defrost water that has flowed down to the machine room can be evaporated in the first evaporation tray that uses the heat of the compressor to evaporate. The defrosted water that has been touched can be evaporated in the second evaporation dish that evaporates using the heat of the condenser pipe, so that even when there is a large amount of defrosted water, it can be evaporated reliably and more quickly.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the inside of an electric refrigerator as viewed from the side, and 1 is a heat insulating box having a freezer compartment 2, a refrigerator compartment 3 and a vegetable compartment 4. The heat insulating box 1 is composed of an outer box 5, an inner box 6 and a foamed heat insulating material 7 filled between them. Behind the freezing compartment 2 is an evaporator 8 and a blower fan 9 for circulating the cold air generated by the evaporator 8 to each of the compartments 2 to 4, which cools the cold compartment 3 and the vegetable compartment 4. Is sent through a cold air duct 11 connected to a cold air distribution chamber 10 behind the freezer compartment 2. The cold air sent into each of the chambers 2 to 4 is configured to be returned to the evaporator 8 through the cold air recirculation paths 12a and 12b formed in the partition wall 12 that partitions the freezing chamber 2 and the refrigerating chamber 3. In addition to the cool air circulation paths 12a and 12b, the partition wall 12 has a dew tray (gutter part) 13, and a defrost heater 14 which is turned on at the time of defrosting operation is provided at substantially the center of the dew tray 13. There is. The dew tray 13 is for receiving defrosting water flowing down from the evaporator 8 side when the refrigerator is defrosted, and the defrosting water collected in the dew tray 13 is passed through the drain pipe 15 to the heat insulation box body. 1 is guided to a machine room 16 formed in the lower rear part of 1, and is evaporated by an evaporation means provided in the machine room 16. The evaporation means will be described below.

As shown in FIG. 2, the evaporating means uses a heat of the compressor 17 to evaporate a constant amount of the first evaporating dish 18, and defrost water overflowing from the first evaporating dish 18 into a condenser. It comprises a second evaporating dish 20 which evaporates using the heat of the pipe 19. The first evaporating dish 18 is located above the compressor 17 and is fixed to the heat insulating box 1 side, and the outlet side of the drain pipe 15 is connected to one side. A water conduit (hose) 22 that guides the defrosted water 21 overflowing from the first evaporating dish 18 to the second evaporating dish 20 is connected to the other side. Since the mounting position of the water conduit 22 is determined in consideration of the evaporation capacity of the first evaporation tray 18, the defrosting water 21 flowing down to the first evaporation tray 18 is used in the next defrosting operation. By the time it starts, it will surely evaporate.

The second evaporating dish 20 is installed on the base 23 side, and the condenser pipe 19 is meandered inside. The condenser pipe 19 is covered with a water-resistant heat-shrinkable tube 24 to prevent erosion due to defrost water. With such a configuration, the first evaporating dish 18 side can use the heat of the compressor 17 to evaporate a certain amount, and the second evaporating dish 20 side can evaporate on the first evaporating dish 18 side. Defrost water that cannot be completely evaporated can be evaporated. FIG. 3 shows another embodiment in which a condenser pipe 19 covered with a water-resistant heat-shrinkable tube 24 is arranged at the bottom of the second evaporation dish 20, and one side of the condenser pipe 19 is used for the second evaporation. It is made to meander at the bottom of the plate 20. With such a configuration, the evaporation capacity on the side of the second evaporating dish 20 can be increased, so that the mounting position of the water guiding pipe 22 is lowered to reduce the amount of water to be evaporated in the first evaporating plate 18, and It is also possible to increase the amount of water to be evaporated in the dish 20, and it is possible to further shorten the time required for evaporation of the entire defrost water.

[0009]

[Effect of device]

 As described above, in the case of the electric refrigerator having the two evaporating dishes as described above, the heat of the compressor and the heat of the condenser pipe can be effectively used to evaporate the defrosting water, and more reliably and more effectively. It can be evaporated quickly, and because the condenser pipe inside the evaporation tray is protected by a water-resistant heat-shrinkable tube, it is safe without the risk of erosion due to defrosting water. Since it fits in the machine room, no extra space is required, and if the size of the heat insulation box is the same as before, there is an advantage that the volume of the vegetable room can be made larger.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a schematic configuration of an electric refrigerator according to the present invention and a conventional example.

FIG. 2 is an enlarged view of the inside of the machine room showing an embodiment of the present invention from the rear side.

FIG. 3 is an enlarged perspective view of an essential part showing another embodiment of the present invention.

[Explanation of symbols]

 1 Insulation box 8 Evaporator 13 Dew tray (gutter part) 14 Defrost heater 15 Drain pipe 16 Machine room 17 Compressor 18 First evaporating dish 19 Condenser pipe 20 Second evaporating dish 21 Defrosting water 22 Water conduit ( Hose) 23 Base 24 Water resistant heat shrinkable tube

Claims (4)

[Scope of utility model registration request] 1. A device for receiving defrosting water flowing down from an evaporator side during defrosting operation in a dew tray, guiding it through a drain pipe to a machine room side formed in a lower portion of a heat insulating box, and evaporating it by an evaporation means. As the evaporating means, a first evaporating dish that evaporates a fixed amount by using heat of a compressor, and the first evaporating dish.
And a second evaporation dish for evaporating the defrosted water overflowing from the evaporation dish using the heat of the condenser pipe. 2. The electric refrigerator according to claim 1, wherein a condenser pipe covered with a water-resistant heat-shrinkable tube is arranged at the bottom of the second evaporation dish. 3. A condenser pipe covered with a water-resistant heat-shrinkable tube is arranged on the bottom of the second evaporation dish, and
The electric refrigerator according to claim 1, wherein one side of the condenser pipe is arranged below the second evaporation dish. 4. The electric refrigerator according to claim 1, wherein the first evaporating dish is provided with a water channel or a water pipe for guiding defrosting water overflowing from the evaporating dish to the second evaporating dish.