JPH09310959A - Condenser device for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for providing a space for releasing heat when a refrigerator is installed by setting a condenser, in which a tube is fitted into a fitting groove for fitting a tube formed in a corrugated fin, nearly horizontally with respect to the bottom surface of the refrigerator and mounting an evaporation pan on the top surface of the condenser. SOLUTION: A corrugated fin tube type condenser 3, a refrigerator rear wall embedded type condenser 10c, and an accumulator 5 are connected to a delivery port of a compressor 1 through a first pipe condenser 10a, a second pipe condenser 10b, and a third pipe condenser 10d, respectively, and a capillary tube 7 and an evaporator 9 also are connected to the delivery port. And the condenser 3 disposed nearly horizontally with respect to the bottom surface of a refrigerator has corrugated fins 3a formed by folding one aluminum plate material into the corrugated shape and a tube 37 is fitted into fitting grooves 35 of the fins 3a. And an evaporation pan 15 is mounted on a flat mount surface 39 on the top side of the condenser 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an improvement in a condenser device for a refrigerator.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional condenser device for a refrigerator. Reference numeral 51 denotes a compressor, and a copper pipe-shaped serpentine condenser 53, a copper capillary tube 55, and an aluminum evaporator 57 are connected to the compressor 51. The condenser 53 is embedded in the side wall and the back wall of the refrigerator, and the evaporator 57 is arranged in the freezer.

[0003]

However, in the conventional structure, since the copper pipe-shaped capacitor 53 is embedded in the side wall and the back wall of the refrigerator, the thickness of the heat insulating material such as the side wall and the back wall is reduced accordingly. Since it becomes thicker, the internal volume of the refrigerator is reduced, and when installing the refrigerator, for example, a space for heat dissipation is required on the left and right sides of the refrigerator, so that a large refrigerator installation space is required.

The evaporating dish of the refrigerator stores drain water, but conventionally, the evaporating dish has not been positively heated to evaporate the drain water.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to reduce the internal volume of the refrigerator, and at the time of installing the refrigerator, provide a space for heat radiation on the left and right sides of the refrigerator. Another object of the present invention is to provide a condenser device for a refrigerator that does not need to be opened and can positively add heat to the evaporation dish.

[0006]

According to a first aspect of the present invention, a tube is fitted into a fitting groove for fitting a tube formed in a corrugated fin to form a capacitor, and the capacitor is formed substantially at the bottom of the refrigerator. It is characterized in that it is arranged horizontally and an evaporating dish of a refrigerator is placed on the upper surface of the condenser.

According to the first aspect of the invention, since the tube is fitted into the fitting groove for fitting the tube formed in the corrugated fin to form the capacitor, the performance of the capacitor can be improved and the capacitor can be miniaturized. . Therefore, since the capacitors can be collectively arranged on the bottom of the refrigerator, it is not necessary to embed the capacitors in the side walls and back wall of the refrigerator as in the conventional case, and accordingly, the heat insulating material for the side walls and back wall can be increased accordingly. Can be made thinner. Therefore,
The internal volume of the refrigerator can be increased as compared with the conventional one. Further, when installing the refrigerator, it is not necessary to provide a heat radiation space on the left and right of the refrigerator, so that the installation space of the refrigerator can be reduced. Further, since the evaporation tray is placed on the upper surface of the condenser, it is constantly heated by the heat radiation of the condenser, so that the evaporation of the drain water collected in the evaporation tray is accelerated.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a condenser device for a refrigerator according to the present invention will be described below with reference to the drawings.
In this specification, the term “aluminum” hereinafter includes “aluminum alloy” in addition to “pure aluminum”.

In FIG. 1, reference numeral 1 indicates a compressor. A corrugated fin tube type condenser 3 is connected to the discharge port of the compressor 1 via a first pipe condenser 10a, and the condenser 3 is arranged substantially horizontally at the bottom of the refrigerator. The outlet of the condenser 3 is connected to a back wall buried type condenser 10c of the refrigerator via a second pipe condenser 10b, and the outlet of the back wall buried type condenser 10c is connected to the accumulator 5 via a third pipe condenser 10d. Are connected. A copper capillary tube 7 is connected to the outlet of the accumulator 5.
Is connected to an evaporator 9 made of aluminum. An accumulator 11 is connected to an outlet of the evaporator 9. A pipe 13 is connected to the accumulator 11, and the pipe 13 is connected to the compressor 1
Connected to the suction port.

The aluminum evaporator 9 is formed by fixing a plurality of strip-shaped aluminum fins 9b to a straight portion of a tube 9a bent into a serpentine shape.
It is called a plate fin tube type heat exchanger.

According to this embodiment, the capacitor 3 is characterized.

The condenser 3 is a heat exchanger of a corrugated fin tube type, and the corrugated fin 3a is formed by bending a single aluminum plate material into a corrugated shape. The manufacturing process of the capacitor 3 will be briefly described. As shown in FIG. 2, first, a fin fitting 31 (FIG. 2A) wound in a roll shape is formed by using a mold (not shown), and a tube fitting groove ( (Not shown), the fin material 31 is bent into a corrugated shape using a pair of upper and lower molds 33 and 34 (FIG. 2b) to form a corrugated fin 3a having a fitting groove 35 (FIG. 2).
c).

On the other hand, a copper pipe-shaped tube material 36
(FIG. 2d) is bent into a serpentine shape to form a tube 37 (FIG. 2e), and this tube 37 is placed on the fitting groove 35 of the corrugated fin 3a manufactured in the step of FIG. 2c (FIG. 2f).

Then, the tube 37 is pushed into the fitting groove 35 by using the pushing jig 38 (FIG. 2g), and after the fitting of the tube 37 is completed, a part 3 of the tube 37 is removed.
7a and 37b are partially bent to form the capacitor 3 (FIG. 2h).

As shown in FIG. 1, the thus-formed capacitor 3 is arranged substantially horizontally at the bottom of the refrigerator with the opening of the fitting groove 35 facing upward. A flat mounting surface 39 is formed on the upper surface of the capacitor 3 in a state of being arranged substantially horizontally, and the evaporation tray 15 made of aluminum of the refrigerator is mounted on the flat mounting surface 39.

When a plate fin tube type heat exchanger (for example, the evaporator 9) is used for the condenser 3, the evaporation tray 15 is temporarily placed on the upper surface of the condenser 3.
Even if it is placed, since the contact area with the evaporating dish 15 is too small, a sufficient heat radiating area cannot be obtained, and the evaporation of drain water collected in the evaporating dish 15 is not promoted. In addition, since the evaporating dish 15 for storing heavy drain water is placed on the edge of the thin plate fin, sufficient fin strength cannot be maintained.

According to this embodiment, since the evaporation dish 15 is placed on the flat placement surface 39, a sufficient contact area can be maintained. Therefore, a sufficient heat radiation area can be taken,
Since the evaporation tray 15 made of aluminum is constantly heated by the heat radiation of the condenser 3, evaporation of the drain water collected in the evaporation tray 15 is promoted. Therefore, when the refrigerator is used, troubles such as overflow of drain water on the indoor floor are eliminated.

Moreover, since the corrugated fins 3a are bent in a corrugated shape as shown in FIG.
Since the section modulus increases and the strength of the fins increases, sufficient strength can be maintained even if the evaporating dish 15 is placed thereon. In order to further increase the strength of the corrugated fin 3a, for example, an AlMn-based alloy (Mn is added in an amount of 1.0 to 1.5%, or Mg and 0.8 to 1.3%) is added to the fin material 31 described above. Alloy). It is desirable to use

Further, since the corrugated fin / tube type heat exchanger is used for the condenser 3, it is caused by the vibration of the compressor 1 as compared with the case of using the plate fin / tube type heat exchanger. Fin looseness is suppressed.

Next, the operation will be described with reference to FIG.
The high-temperature, high-pressure refrigerant discharged from the compressor 1 flows into the corrugated fin-tube condenser 3 through the first pipe condenser 10a, is condensed in the process of flowing through the condenser 3 and radiates heat to the atmosphere. The heat radiation heats the evaporating dish 15 and promotes the evaporation of the drain water. The refrigerant passing through the condenser 3 flows into the back wall buried type condenser 10c of the refrigerator through the second pipe condenser 10b and is further condensed during this period. The refrigerant that has passed through the back wall embedded condenser 10c flows into the capillary tube 7 via the third pipe condenser 10d and the accumulator 5, where it is depressurized and flows into the aluminum evaporator 9.

The refrigerant flowing into the evaporator 9 is evaporated and absorbs heat in the evaporator 9, whereby the inside of the refrigerator is cooled. The refrigerant that has passed through the evaporator 9 is returned to the suction port of the compressor 1 through the accumulator 11 and the pipe 13.

According to this embodiment, since the above-mentioned condenser 3 is a corrugated fin tube type heat exchanger, as shown in FIG. 3, a conventional type (FIG. 4) condenser (embedded condenser) is used. It was found that the heat exchange performance KA (W / A) was improved in each stage as compared with the case of using (). It was also found that the heat exchange performance KA (W / A) was improved even when compared with the case where the wire capacitor (Fig. 3) was used.

According to this, since the capacitor 3 can be downsized, the capacitor 3 can be collectively arranged at the bottom of the refrigerator. Therefore, unlike the conventional case, it is not necessary to bury a capacitor in the side wall and back wall of the refrigerator, so that it is possible to reduce the thickness of the heat insulating material such as the side wall and back wall. Can be increased compared to the conventional one. Further, when the refrigerator is installed, for example, it is not necessary to provide a space for heat radiation on the left and right of the refrigerator, so that the refrigerator installation space can be reduced, and other various effects can be obtained.

In FIG. 3, K is the heat transmission rate (W / m 2
• K) and A is the external surface area (m2). Further, in FIG. 3, the heat exchange performance KA (W / A) was compared in the state where the installation areas of all the capacitors were the same.

FIG. 4 shows another embodiment.

According to this embodiment, the shape of the corrugated fins 23a constituting the capacitor 3 is characteristic. The corrugated fins 23a are formed by bending a piece of aluminum fin material (plate material) into a corrugated shape.

In this corrugated fin 23a,
Different from the above-described embodiment, the fins are formed so as to be bent in a wavy shape in the airflow direction at the position out of the tube fitting groove 25. By thus bending the fins in the airflow direction to form a wavy shape, the fins become uneven in the airflow direction, which disturbs the flow of the airflow and improves heat transfer efficiency. it can.

Further, the corrugated fins 23a are bent into a corrugated shape in the step of FIG. 2b described above,
After that, it is cut into a predetermined length by a cutting blade (not shown) or the like, but when it is cut, there arises a problem that the whole is curved and rounded as shown by an imaginary line in FIG. 7. If the whole is curved and rounded, there is a problem that it is difficult to apply the tube from above to the tube fitting groove 25 of the corrugated fin 23a in the step of FIG. 2f described above.

As described above, as shown in FIGS. 5 and 6, when the fin material 31 is sandwiched between the metal molds 33 and 34 and the fin material 31 is pressed, as a matter of fact, Since there is a gap between the molds 33 and 34, the corner A portion cannot be plastically deformed substantially at a right angle as shown in FIG. 6, and after cutting, as shown in FIG. 7, the corner B portion is formed. This is because a force acts to increase the internal angle of.

In order to solve this, according to this embodiment, the molds 33 and 3 used in the step of FIG. 2b described above are used.
The shape of No. 4 (this shape is not shown) is corrugated so as to be uneven along the width direction of the fin material 31.

When the fin material 31 is bent into a corrugated shape by using the dies 33 and 34 formed in a wave shape along the width direction of the fin material 31 as described above (FIG. 2b),
After the fin material 31 is cut to a predetermined length with a cutting blade (not shown), the whole is not curved and rounded, and the fin is uneven in the air flow direction as shown in FIG. , As a whole, it has a beautiful corrugated shape.

FIG. 8 shows still another embodiment.

According to this embodiment, the side edge 61 of the fin material 61 wound around a roll (not shown) and sent out.
a is previously double-folded over a predetermined width w,
After that, the fin material 6 in which the side edge 61a is folded back double
1 is a mold 33, 3 as shown in the process of FIG.
4 is bent into a corrugated shape to form corrugated fins 63 as shown in FIG.

Corrugated fin 6 formed in this way
When the capacitor is manufactured by using No. 3 as described above, since the tip 63a of the corrugated fin 63 is rounded, troubles such as cutting the hand with the fin edge are eliminated in advance. It is also possible to obtain the effect of being less likely to get caught in the edge.

Although the present invention has been described based on the embodiment, it is obvious that the present invention is not limited to this.

[0036]

As is apparent from the above description, according to the present invention, the performance of the capacitor can be improved and the size of the capacitor can be reduced, so that the capacitors can be collectively arranged at the bottom of the refrigerator. Therefore, unlike the conventional case, it is not necessary to bury a capacitor in the side wall and back wall of the refrigerator, and the thickness of the heat insulating material such as the side wall and back wall can be reduced accordingly, so that the internal volume of the refrigerator can be reduced. Can be increased compared to the conventional one. Further, when installing the refrigerator, it is not necessary to provide a heat radiation space on the left and right of the refrigerator, so that the refrigerator installation space can be reduced. Further, since the evaporation dish is placed on the upper surface of the condenser, it is constantly heated by the heat radiation of the condenser, so that the evaporation of the drain water collected in the evaporation dish is promoted.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram of a refrigerator according to the present invention.

2A to 2H are perspective views showing a manufacturing process of a capacitor.

FIG. 3 is a diagram showing the heat exchange performance of a capacitor according to the present invention.

FIG. 4 is a perspective view showing another embodiment.

FIG. 5 is a view showing a die and a fin material.

FIG. 6 is a diagram showing a state where a fin material is pressed by a mold.

FIG. 7 is a view showing a state in which a corrugated fin is curved.

FIG. 8 is a perspective view showing another embodiment.

FIG. 9 is a perspective view of a corrugated fin.

FIG. 10 is a refrigerant circuit diagram of a conventional refrigerator.

[Explanation of symbols]

 1 Compressor 3 Condenser 3a Corrugated fin 5,11 Accumulator 7 Capillary tube 9 Evaporator 15 Evaporating dish 33,34 Mold 35 Fitting groove 37 Tube 39 Mounting surface

Claims (1)

[Claims] 1. A tube is fitted in a fitting groove for fitting a tube formed in a corrugated fin to form a capacitor, and the capacitor is arranged substantially horizontally at the bottom of the refrigerator, and the condenser is placed on the upper surface of the refrigerator. A condenser device for a refrigerator, which is equipped with an evaporation dish.