TWI414738B - Freezer-refrigerator - Google Patents

Abstract

The invention provides a freezing and refrigerating chamber, which comprises a first finned tube cooler (13) and a second finned tube cooler (14). The first finned tube cooler (13) is formed by a heat transfer tube (13a) and a plurality of flat fins (13b). The heat transfer tube (13a) passes through the plurality of flat fins (13b) so as to fix the plurality of flat fins (13b). The second finned tube cooler (14) is formed by a heat transfer tube (14a) and a plurality of flat fins (14b). The heat transfer tube (14a) passes through the plurality of flat fins (14b) so as to fix the plurality of flat fins (14b). The second finned tube cooler (14) is smaller than the first finned tube cooler (13) and is arranged at the upstream side of the air flow of the first finned tube cooler (13).

Description

Freezer

The present invention relates to a freezer that includes a cooler that is loaded into a refrigeration cycle and cooled.

The cooler of the conventional freezer and cold storage is composed of the following members, and the fin-and-tube cooler is a heat pipe through which the refrigerant flows, and a heat transfer pipe is interposed between the heat transfer pipes in the tube axis direction. a flat fin-shaped fin fixed in the form; and a spiral cooler composed of the same heat pipe as described above and a heat sink spirally wound around the outer circumference thereof; the spiral heat sink tube type heat exchange The device is disposed on the upstream side in the wind direction of the fin tube cooler (see, for example, Patent Document 1).

[Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2003-313947 (Application No. Patent No. 1, FIG. 2 to FIG. 2)

However, in the conventional refrigerator-freezer described above, the spiral fin-and-tube cooler disposed on the upstream side of the fin-and-tube cooler in the wind direction is much more expensive than the fin-and-tube cooler. In recent years, although energy saving is required, it is also required to reduce the cost due to the effect of lowering the selling price. If a spiral fin-and-tube heat exchanger is used, the energy saving effect of the relative cost is lowered, and it is difficult to introduce mass production.

The present invention has been made to solve this problem, and an object thereof is to provide a freezer and refrigerator which is inexpensive and has high heat exchange efficiency.

The freezer-refrigerator according to the present invention includes: a first fin-and-tube cooler configured to cool a surrounding heat pipe by a refrigerant flowing in, and a plurality of flat fins penetrating and fixed to the heat pipe; and 2 The heat sink tube cooler is composed of a heat pipe that flows through the refrigerant flowing in, and a plurality of flat fins that are inserted through and fixed to the heat pipe; the second heat sink tube cooler is the first one. The fin-and-tube cooler is small and disposed on the upstream side of the air flow of the first fin-and-tube cooler.

In the present invention, since the second fin-and-tube cooler is disposed on the upstream side of the air flow of the first fin-and-tube cooler, the attachment position of the frost due to the operation of the freezer is mainly 2 The heat sink tube cooler can reduce the amount of frost applied to the first heat sink tube cooler. As the flat fins of the first fin-and-tube cooler are not blocked by frost, the heat exchange efficiency of the airflow can be suppressed, and an inexpensive freezer can be provided.

First embodiment

1 is a front view of a freezer-refrigerator according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view showing an enlarged view of a cooler chamber of the freezer-refrigerator according to the first embodiment of the present invention.

In the main body 1 of the freezer-refrigerator according to the first embodiment, the refrigerating compartment 2 is provided in the uppermost stage, and the switching compartment 3 and the ice making compartment 22 are adjacently disposed in the lower section. The vegetable compartment 5 is placed at the lowermost stage, and the freezing compartment 4 is placed thereon. Further, the arrangement of the chambers provided in the body 1 is not limited. In the opening of the refrigerator compartment 2, for example, the left and right door type doors 6 are attached. Pull-out doors 7, 8, 9, and 10 are provided, for example, in the opening portions of the switching chamber 3, the ice making chamber 22, the freezing chamber 4, and the vegetable compartment 5. Further, although the door 6 of the refrigerating compartment 2 is of a left and right type, it may be a single door type.

The compressor 11 is disposed at the lowermost portion of the back surface of the body 1. The compressor 11 is an element constituting the refrigeration cycle of the body 1, and has a function of compressing the refrigerant in the refrigeration cycle. The refrigerant compressed by the compressor 11 is condensed in a condenser (not shown), and the refrigerant in a condensed state is depressurized by a capillary (not shown).

The cooler chamber 12 is disposed above the compressor 11. The first fin-and-tube cooler 13 (hereinafter referred to as "the first cooler 13"), the second fin-and-tube cooler 14 (hereinafter referred to as the "second cooler 14"), the cooling fan 15, and the radiation The heater 16, the heater cover 17, the drain pan 18 having the drain hole 19, the freezer compartment return port 20, and the refrigerating compartment return port 21 are provided in the cooler chamber 12.

The first cooler 13 is composed of a heat transfer pipe 13a and a plurality of flat fins 13b penetrating and fixed to the heat transfer pipe 13a. Similarly to the first cooler 13, the second cooler 14 is composed of a heat transfer pipe 14a and a plurality of flat fins 14b penetrating and fixed to the heat transfer pipe 14a. As shown in FIG. 3, the second cooler 14 is smaller than the first cooler 13, and is disposed on the upstream side of the air flow of the first cooler 13. Further, a surface treatment in which the water is highly slippery is applied to the heat transfer pipe 14a of the second cooler 14. For example, the surface of the second cooler 14 is coated with a substance having hydrophilicity or hydrophilicity. This is to reduce the amount of frost and moisture retained during defrosting.

The first and second coolers 13 and 14 are one element constituting the refrigeration cycle of the main body 1, and are connected by the same tongue. The coolers 13 and 14 evaporate the refrigerant decompressed by the capillary tube described above, and cool the periphery by the endothermic action during the evaporation. The cooling fan 15 is disposed above the first and second coolers 13 and 14, and sucks the cold air cooled by the first and second coolers 13 and 14 and sends them to the respective chambers of the main body 1.

The radiant heater 16 is disposed below the first cooler 13 and melts the frost adhering to the first and second coolers 13 and 14. The heater cover 17 is disposed between the first cooler 13 and the radiant heater 16, and the heater cover 17 is provided for defrosting the first and second coolers 13, 14 when the radiant heater 16 is defrosted. Water will not be set up directly. The drain pan 18 is provided at the bottom of the cooler chamber 12 for receiving the drain water dripped from the first and second coolers 13, 14. This drain is discharged from the drain hole 19 provided at the bottom of the drain pan 18.

The freezer compartment return port 20 is an air path between the freezing compartment 4 and the cooler compartment 12, and the refrigerating compartment return port 21 is an air path between the refrigerating compartment 2 and the cooler compartment 12. When the cooling fan 15 is in operation, cold air flows from the freezing compartment 4 toward the cooler compartment 12, and when the cooling fan 15 is stopped, the temperature of the surroundings is balanced, and the cooling chamber 12 may be caused to flow from the cooler chamber 12 to the freezing compartment 4. convection.

In the refrigerating refrigerator configured as described above, the cooling air cooled by the first and second coolers 13 and 14 is sent to the respective chambers by the cooling fan 15 in the cooling operation, and is returned to the cooler chamber 12 . In the circulation of the cold air, the amount of frost attached to the second cooler 14 on the upstream side of the air flow of the first cooler 13 is larger, and the first one is disposed on the downstream side of the second cooler 14 . The amount of frost attached to the cooler 13 is small.

In this manner, since the second cooler 14 is disposed on the upstream side of the air flow of the first cooler 13 , the amount of frost adhering to the second cooler 14 is larger than that of the first cooler 13 . Therefore, the flat fins 13b of the first cooler 13 are not blocked by frost, and the heat exchange efficiency of the airflow can be suppressed from being lowered.

In addition, when the second cooler 14 is added to the cooling operation in which the frost is not attached, the heat exchange rate of the entire first and second coolers 13 and 14 is increased, and the heat exchange efficiency of the entire first and second coolers 13 and 14 is increased. As a whole, the effect of reducing the power consumption of the freezer is increased. Further, since the fins 14b of the second cooler 14 are formed in a flat shape, the cost can be reduced as compared with the conventional use of the spiral fins.

Second embodiment

Fig. 4 is a cross-sectional view showing the cooler chamber of the freezer-refrigerator according to the second embodiment of the present invention in an enlarged manner. In addition, the same components as those in the first embodiment are denoted by the same reference numerals.

In the second embodiment, the second fin-and-tube cooler 14 (hereinafter referred to as "second cooler 14") is larger than the first fin-and-tube cooler 13 (hereinafter referred to as "the" as shown in Fig. 4). The first cooler 13") is small and disposed on the upstream side of the air flow of the first cooler 13. Moreover, the attachment angle of the second cooler 14 is inclined in the range of 45 to 90 degrees with respect to the bottom surface of the flat fin 13b of the first cooler 13. The angle of the second cooler 14 matches the direction of the cold air flowing into the cooler chamber 12 from the freezer compartment return port 20 and the refrigerating compartment return port 21 .

Therefore, the time during which the cold air flowing into the cooler chamber 12 comes into contact with the flat fins 14b of the second cooler 14 is longer than that of the first embodiment. Therefore, the heat exchange efficiency of the second cooler 14 is further improved, and the amount of frost adhering to the heat transfer pipe 14a of the second cooler 14 is increased, and a freezer that is excellent in energy saving can be provided to the market.

Third embodiment

Fig. 5 is a cross-sectional view showing the cooler chamber of the freezer-refrigerator according to the third embodiment of the present invention in an enlarged manner. In addition, the same components as those in the first embodiment are denoted by the same reference numerals.

In the third embodiment, the second fin-and-tube cooler 14 (hereinafter referred to as "second cooler 14") is shown in Fig. 5 as compared with the first fin-and-tube cooler 13 (hereinafter referred to as " The first cooler 13") is small and disposed on the upstream side of the air flow of the first cooler 13. Further, the attachment angle of the second cooler 14 is a flat fin 13b that is opposed to the first cooler 13 in order to match the direction of the cold air flowing into the cooler chamber 12 from the freezer compartment return port 20 and the refrigerating compartment return port 21. Tilt to a range of 45 to 90 degrees.

In addition, the frost adhering to the second cooler 14 is likely to grow in a range in which the cold air collides with the front edge of the flat fins 14b, and the front edge area of the flat fins 14b is enlarged. In other words, the shape of the flat fins 14b is, for example, an octagonal shape to promote the frost which is the original function of the second cooler 14.

Therefore, the amount of frost attached to the octagonal flat fin 14b of the second cooler 14 is further increased, and a refrigerated refrigerator excellent in energy saving can be provided to the market.

Further, although the shape of the flat fins 14b of the second cooler 14 is octagonal, the shape is not limited thereto. For example, the flat fins 14b may have an elliptical shape or a crescent shape.

1. . . Ontology

2. . . Cold room

3. . . Switch room

4. . . Freezer

5. . . Vegetable room

6. . . Left and right two-door doors

7, 8, 9, 10. . . Withdrawable door

11. . . compressor

12. . . Cooler room

13. . . 1st cooler

13a. . . Heat pipe

13b. . . Flat fin

14. . . 2nd cooler

14a. . . Heat pipe

14b‧‧‧flat fins

15‧‧‧Cooling fan

16‧‧‧radiation heater

17‧‧‧heater cover

18‧‧‧Drainage tray

19‧‧‧Drainage holes

20‧‧‧Freezer backflow

21‧‧‧Refrigeration of the cold room

22‧‧‧ ice making room

Fig. 1 is a front view of a freezer-refrigerator according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view showing the side surface of the freezer-refrigerator according to the first embodiment of the present invention.

Fig. 3 is a cross-sectional view showing the cooler chamber of the freezer in Fig. 2 in an enlarged manner.

Fig. 4 is a cross-sectional view showing the cooler chamber of the freezer-refrigerator according to the second embodiment of the present invention in an enlarged manner.

Fig. 5 is a cross-sectional view showing the cooler chamber of the freezer-refrigerator according to the third embodiment of the present invention in an enlarged manner.

1‧‧‧ Ontology

2‧‧‧Refrigerator

3‧‧‧Switching room

4‧‧‧Freezer

5‧‧‧ vegetable room

6‧‧‧Two-door door

7, 9, 10‧‧‧Extracted doors

11‧‧‧Compressor

12‧‧‧cooler room

13‧‧‧1st cooler

14‧‧‧2nd cooler

15‧‧‧Cooling fan

16‧‧‧radiation heater

17‧‧‧heater cover

22‧‧‧ ice making room

Claims (6)

A freezer-refrigerator comprising: a first fin-and-tube cooler, wherein the heat-dissipating tube is cooled by an inflowing refrigerant, and a plurality of flat fins penetrating and fixed to the heat-conducting tube; and The second heat sink tube cooler is composed of a heat transfer tube that is cooled by the inflowing refrigerant, and a plurality of flat fins that are inserted through and fixed to the heat transfer tube; the second heat sink tube cooler is The first fin-and-tube cooler is small in size and disposed on the upstream side of the air flow of the first fin-and-tube cooler. The freezer-refrigerator according to claim 1, wherein the mounting angle of the second fin-and-tube cooler is inclined to a range of 45 to 90 degrees with respect to a bottom surface of the first fin-and-tube cooler. A freezer-refrigerator according to claim 1 or 2, wherein the flat fin of the second fin-and-tube cooler has an octagonal shape. A freezer-refrigerator according to claim 1 or 2, wherein the flat fin of the second fin-and-tube cooler has an elliptical shape. A freezer-refrigerator according to claim 1 or 2, wherein the flat fin of the second fin-and-tube cooler has a crescent shape. A freezer-refrigerator according to claim 1 or 2, wherein the heat-conducting tube of the second fin-and-tube cooler is subjected to a surface treatment with high water slidability.