JP2012032094A - Refrigerator-freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator-freezer low in cost and high in heat exchange efficiency.SOLUTION: The refrigerator-freezer is provided with a first fin and tube type cooler 13 composed of heat transfer tubes 13a and a plurality of flat fins 13b penetrated and fixed by the heat transfer tubes 13a, and a second fin and tube type cooler 14 composed of heat transfer tubes 14a and a plurality of flat fins 14b penetrated and fixed by the heat transfer tubes 14a. The second fin and tube type cooler 14 is smaller than the first fin and tube type cooler 13 and arranged at an upstream side of the cooler 13 in the air flow.

Description

  The present invention relates to a refrigerator-freezer provided with a cooler that is incorporated in a refrigeration cycle and cools.

  A conventional refrigerator for a refrigerator is a fin-and-tube comprising a heat transfer tube through which a refrigerant flows and flat plate-like fins fixed in such a manner as to penetrate the heat transfer tube while being spaced apart from each other in the tube axis direction of the heat transfer tube Type cooler, heat transfer tube similar to the above, and a spiral type cooler composed of fins spirally wound around its outer periphery, and the spiral fin tube type heat exchanger has a wind direction higher than that of the fin and tube type cooler. (See, for example, Patent Document 1).

JP 2003-313947 A (Claims, FIG. 1-2)

  However, in the above-described conventional refrigerator-freezer, the spiral fin tube type heat exchanger disposed on the upstream side of the wind direction of the fin and tube type cooler is very expensive compared to the fin and tube type cooler. In recent years, energy savings have been demanded, but at the same time, cost reductions have also been demanded due to the effect of selling prices down, and the use of spiral fin tube heat exchangers has diminished the cost-saving effect and introduced mass production. It was difficult.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a refrigerator-freezer that is inexpensive and has high heat exchange efficiency.

  The refrigerator-freezer according to the present invention includes a first fin-and-tube type cooler configured of a heat transfer tube that cools the surroundings with an inflowing refrigerant, and a plurality of plate-like fins that are penetrated and fixed to the heat transfer tube, A second fin and tube comprising a heat transfer tube that cools the surroundings with an inflowing refrigerant, and a second fin-and-tube type cooler composed of a plurality of plate-like fins that are passed through and fixed to the heat transfer tube The mold cooler is smaller than the first fin-and-tube cooler, and is disposed on the upstream side of the air flow from the first fin-and-tube cooler.

  In the present invention, since the second fin-and-tube cooler is arranged upstream of the air flow from the first fin-and-tube cooler, the location of frost generated by the operation of the refrigerator-freezer is mainly used. It becomes a 2nd fin and tube type cooler, and it becomes possible to reduce the adhesion amount of the frost to the 1st fin and tube type cooler. Accordingly, the flat fins of the first fin-and-tube cooler are not blocked by frost, and it is possible to suppress a reduction in the heat exchange efficiency of the air flow, and provide an inexpensive refrigerator-freezer it can.

It is a front view of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is sectional drawing which cut | disconnects and shows the side surface of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is sectional drawing which expands and shows the cooler room of the refrigerator-freezer of FIG. It is sectional drawing which expands and shows the cooler room of the freezer refrigerator which concerns on Embodiment 2 of this invention. It is sectional drawing which expands and shows the cooler room of the freezer refrigerator which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
1 is a front view of a refrigerator-freezer according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the refrigerator-freezer according to Embodiment 1 of the present invention, cut along a side surface, and FIG. 3 is a refrigerator-freezer of FIG. It is sectional drawing which expands and shows the cooler chamber of this.
The main body 1 of the refrigerator-freezer in Embodiment 1 is provided with a refrigeration room 2 at the top, a switching room 3 and an ice making room (not shown) adjacent to each other, and a vegetable room 5 at the bottom. Is provided, and the freezer compartment 4 is provided thereon. In addition, the arrangement | positioning of each chamber provided in the main body 1 is not limited. For example, a kannon door 6 is attached to the opening of the refrigerator compartment 2. For example, drawer-type doors 7, 8, 9, and 10 are provided in the opening portions of the switching chamber 3, the ice making chamber, the freezing chamber 4, and the vegetable chamber 5. In addition, although the door 6 of the refrigerator compartment 2 was made into the Kannon type, a single door type door may be used.

  A compressor 11 is installed at the bottom of the back surface of the main body 1. The compressor 11 is a component that constitutes the refrigeration cycle of the main body 1 and has an action of compressing the refrigerant in the refrigeration cycle. The refrigerant compressed by the compressor 11 is condensed by a condenser (not shown). The condensed refrigerant is decompressed by a capillary tube (not shown).

  A cooler chamber 12 is provided above the compressor 11. The cooler chamber 12 includes a first fin and tube cooler 13 (hereinafter referred to as “first cooler 13”) and a second fin and tube cooler 14 (hereinafter referred to as “second cooler 13”). A cooler 14), a cooling fan 15, a radiant heater 16, a heater cover 17, a drain pan 18 having a drain hole 19, a freezer compartment return port 20, and a refrigerator compartment return port 21. Yes.

  The first cooler 13 includes a heat transfer tube 13a and a plurality of plate-like fins 13b that are fixed to the heat transfer tube 13a. Similarly to the above, the second cooler 14 is composed of a heat transfer tube 14a and a plurality of plate-like fins 14b that are penetrated and fixed to the heat transfer tube 14a. As shown in FIG. 3, the second cooler 14 is smaller than the first cooler 13 and is disposed upstream of the first cooler 13 in the air flow. Further, the heat transfer tube 14a of the second cooler 14 is coated with, for example, a new hydrophobic or hydrophilic substance. This is to reduce the amount of frost and moisture retained during defrosting.

  The 1st and 2nd coolers 13 and 14 are one part which constitutes the refrigerating cycle which main part 1 has, and are connected by the same piping. The coolers 13 and 14 evaporate the refrigerant depressurized by the capillary tube, and cool the periphery by the endothermic action during the evaporation. The cooling fan 15 is provided above the first and second coolers 13 and 14, sucks the cold air cooled by the first and second coolers 13 and 14, and enters each chamber of the main body 1. sending.

  The radiant heater 16 is disposed below the first cooler 13 and melts frost attached to the first and second coolers 13 and 14. The heater cover 17 is provided between the first cooler 13 and the radiant heater 16. The heater cover 17 is provided in order to prevent water dripping when the first and second coolers 13 and 14 are defrosted by the radiant heater 16. The drain pan 18 is provided at the bottom of the cooler chamber 12 and receives drain water dripping from the first and second coolers 13 and 14. The drain water is discharged from a drain hole 19 provided at the bottom of the drain pan 18.

  The freezer compartment return port 20 is an air passage between the freezer compartment 4 and the cooler chamber 12, and the refrigerating chamber return port 21 is an air passage between the refrigerating chamber 2 and the cooler chamber 12. During the operation of the cooling fan 15, cold air flows from the freezer compartment 4 toward the cooler compartment 12. When the operation of the cooling fan 15 is stopped, convection may occur from the cooler chamber 12 to the freezer compartment 4 due to the surrounding temperature balance.

  In the refrigerator-freezer configured as described above, during the cooling operation, the cold air cooled by the first and second coolers 13 and 14 is sent to each chamber by the cooling fan 15 and is stored in the cooler chamber 12. Return to. Due to the circulation of the cold air, the amount of frost attached to the second cooler 14 disposed on the upstream side of the air flow from the first cooler 13 is increased and disposed on the downstream side of the second cooler 14. Further, the amount of frost attached to the first cooler 13 is reduced.

  Thus, since the 2nd cooler 14 is arrange | positioned in the upstream of the flow of air rather than the 1st cooler 13, the 2nd cooler 14 is more frosty than the 1st cooler 13. The amount of adhesion increases. Therefore, the space between the plate-like fins 13b of the first cooler 13 is not blocked by frost, and it is possible to suppress a decrease in the heat exchange efficiency of the airflow.

  In addition, during the cooling operation in which frost is not attached, the addition of the second cooler 14 can suppress a decrease in the heat exchange efficiency of the airflow, so the first and second coolers 13 and 14 as a whole. The amount of heat exchange increases and the effect of reducing the power consumption of the refrigerator / freezer is increased. Furthermore, since the fins 14b of the second cooler 14 have a flat plate shape, the cost can be reduced as compared with the conventional case using spiral fins.

Embodiment 2. FIG.
FIG. 4 is an enlarged cross-sectional view of the refrigerator room of the refrigerator-freezer according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the part similar to Embodiment 1. FIG.
In the second embodiment, the second fin-and-tube cooler 14 (hereinafter, referred to as “second cooler 14”) includes the first fin-and-tube cooler 13 ( Hereinafter, it is smaller than the first cooler 13 and is arranged upstream of the air flow from the first cooler 13. The mounting angle of the second cooler 14 is tilted within a range of 45 degrees to 90 degrees with respect to the flat fins 13 b of the first cooler 13. The angle of the second cooler 14 is adjusted to the wind direction of the cold air flowing into the cooler chamber 12 from the freezer return port 20 and the refrigerating chamber return port 21.

  As a result, the time during which the cold air flowing into the cooler chamber 12 is in contact with the flat fins 14b of the second cooler 14 is longer than that in the first embodiment. Therefore, the heat exchange efficiency of the second cooler 14 is further improved, the amount of frost adhering to the flat fins 14b of the second cooler 14 is increased, and a refrigerator-freezer excellent in energy saving is provided to the market. It becomes possible.

Embodiment 3 FIG.
FIG. 5 is an enlarged cross-sectional view showing a refrigerator room of a refrigerator-freezer according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the part similar to Embodiment 1. FIG.
In the third embodiment, the second fin-and-tube cooler 14 (hereinafter referred to as “second cooler 14”) includes a first fin-and-tube cooler 13 ( Hereinafter, it is smaller than the first cooler 13 and is arranged upstream of the air flow from the first cooler 13. In addition, the mounting angle of the second cooler 14 is set to a flat plate shape of the first cooler 13 in order to match the wind direction of the cold air flowing into the cooler chamber 12 from the freezer return port 20 and the refrigerating chamber return port 21. It is inclined within a range of 45 to 90 degrees with respect to the fin 13b.

Moreover, the frost adhering to the 2nd cooler 14 has expanded the front edge area of the flat fin 14b based on the phenomenon that it is easy to grow in the range which the front edge of the flat fin 14b and cold air collide. . That is, the shape of the flat fin 14b is, for example, an octagonal shape so as to promote frost formation, which is the original function of the second cooler 14.
Thereby, the quantity of the frost adhering to the octagonal flat fin 14b of the 2nd cooler 14 increases more, and it becomes possible to provide the market with the refrigerator-freezer excellent in energy saving property.
In addition, although the shape of the flat fin 14b of the 2nd cooler 14 was made into the octagonal shape, it is not limited to this. For example, the shape of the flat fin 14b may be elliptical or crescent.

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Refrigeration room, 3 Switching room, 4 Freezing room, 5 Vegetable room, 6 Kannon type door, 7, 8, 9, 10 Pull-out type door, 11 Compressor, 12 Cooler room, 13 1st Fin and tube type cooler, 13a Heat transfer tube, 13b Flat fin, 14 Second fin and tube type cooler, 14a Heat transfer tube, 14b Flat fin, 15 Cooling fan, 16 Radiant heater, 17 Heater cover, 18 Drain pan, 19 drain hole, 20 freezer compartment return, 21 refrigerator compartment return.

Claims (6)

A first fin-and-tube type cooler composed of a heat transfer tube that cools the surroundings with an inflowing refrigerant, and a plurality of plate-like fins that are passed through and fixed to the heat transfer tube;
A heat transfer tube that cools the surroundings with an inflowing refrigerant, and a second fin-and-tube cooler configured by a plurality of flat fins that are penetrated and fixed to the heat transfer tube,
The second fin-and-tube cooler is smaller than the first fin-and-tube cooler and is arranged upstream of the air flow from the first fin-and-tube cooler. A featured refrigerator-freezer.   The mounting angle of the second fin-and-tube type cooler is tilted within a range of 45 degrees to 90 degrees with respect to the bottom surface of the first fin-and-tube type cooler. Freezer refrigerator.   The refrigerator-freezer according to claim 1 or 2, wherein the flat fins of the second fin-and-tube cooler have a polygonal shape.   The refrigerator-freezer according to claim 1 or 2, wherein the flat fins of the second fin-and-tube cooler have an elliptical shape.   The refrigerator-freezer according to claim 1 or 2, wherein the flat fins of the second fin-and-tube cooler have a crescent shape.   The refrigerator-freezer according to any one of claims 1 to 5, wherein the heat transfer tube of the second fin-and-tube type cooler is subjected to a surface treatment with high water slidability.

Images