KR100377770B1 - Direct cooling type refrigerator - Google Patents

Abstract

The present invention relates to a direct-cooling refrigerator, and to a direct-cooling refrigerator in which an accumulator is installed in a thick portion of the foam in order to minimize the influence of temperature.

The configuration of the present invention, at the inner longitudinal direction end of the foam foam 114 formed between the first and second storage chambers 107 and 107 'surrounded by the foam foam 114 and the first and second storage chambers 107 and 107', respectively. It is configured to include an accumulator 120, characterized in that the height ratio of the orifice hole 124 'and the inner pipe 124 in the accumulator is (15/54) or more (33/54) or less. According to such a configuration, the accumulator 120 is installed in a thick portion of the foam foam 114 surrounding the periphery of the first and second storage chambers 107 and 107 ', thereby accumulating the accumulator 120 and the first and second evaporators 108 and 108. The effect that can effectively block heat transfer between ') is expected. In addition, the effect of reducing the noise generated from the accumulator 120 is expected.

Description

Direct cooling type refrigerator

The present invention relates to a direct-cooling refrigerator, and to a direct-cooling refrigerator in which an accumulator is installed in a thick portion of the foam in order to minimize the influence of temperature.

In general, a refrigerator is classified into a simple cooling type and a direct cooling type according to a method of cooling air in a storage space. The inter-cooled refrigerator maintains the inside of the storage space at a predetermined temperature by forcibly circulating the air in the storage space by the operation of the blower fan, and the direct-cooled refrigerator is directly stored by installing the evaporator to be exposed to the storage space or to contact the inner wall thereof. It is to cool the air in the space.

1 shows a heat exchange cycle of a direct chiller according to the prior art. As shown, the heat exchange cycle comprises a compressor 2, a condenser 4, a capillary 6, evaporators 8, 8 ′ and an accumulator 20. The operation of the heat exchange cycle consisting of the above components is as follows.

First, in the compressor 2, a low pressure refrigerant is adiabaticly compressed to be a high temperature and high pressure refrigerant. The refrigerant at high temperature and high pressure in the compressor (2) is condensed while discharging heat from the condenser (4) to the outside, and is transferred to the capillary (6).

In the capillary tube 6, the refrigerant is decompressed while being decompressed, and the refrigerant transferred from the capillary tube 6 to the evaporator absorbs heat from the storage space in which the stored matter is vaporized. At this time, the evaporator is installed around the storage space to exchange heat with the interior of the storage space.

In addition, as shown in the figure, the refrigerant moves through two paths. That is, in the process of moving the refrigerant from the condenser 4 to the capillary 6, the refrigerant is selectively moved in one of two paths by the stepping valve.

In addition, each path passes through a capillary tube 6, an evaporator, and an accumulator 20. At this time, the liquid refrigerant mixed in the gaseous refrigerant is filtered out to remain in the accumulator 20, and only the gaseous refrigerant is transferred to the compressor 2. Then, the refrigerant delivered to the compressor 2 forms a heat exchange cycle by repeating the process as described above.

On the other hand, Figure 2 is a schematic diagram showing a plan view of the conventional direct-cooling refrigerator simply. As shown, the first and second storage chambers 7 and 7 'are formed inside the outer case. The first and second evaporators 8 and 8 'are respectively wound around the first and second storage chambers 7 and 7'. In addition, two accumulators 20 are installed between the two storage chambers. That is, two accumulators 20 are mounted on the upper and lower parts of the drawing, respectively.

3 is a principal longitudinal sectional view showing the accumulator device in detail. As shown, the refrigerant liquid 26 is filled in the accumulator 20 body 22 having the inlet part 22a and the outlet part 22b at the lower part and the upper part, respectively. An inner pipe 24 is inserted into the accumulator 20 to a predetermined height upward from the inlet portion 22a and has an orifice hole 24 'formed at one side thereof. An end of the inner pipe 24 is located above the height of the refrigerant liquid 26, and the orifice hole 24 ′ is locked to the refrigerant liquid 26.

In addition, as shown in the figure, the ratio of the accumulator 20 shape is well represented, which will be described below. (A) shows the unit length below. First, the body 22 of the accumulator 20 has a length of 78a and the width of the body 22 is 41.5a. The length from the inlet portion 22a of the accumulator 20 to the inner pipe 24 is 54a, and the distance from the inlet portion 22a to the orifice hole 24 'is 15a. To achieve.

4 is an experimental data measuring noise generated by bubbles generated from the orifice hole 24 ′ immersed in the refrigerant liquid. As shown, the vibration width of part (A) represents the magnitude of the noise, and the larger the vibration width, the greater the noise.

However, according to the conventional direct-cooling refrigerator as described above, the following configuration problems are raised.

First, since two accumulators 20 are installed between the two evaporators, the distance between the evaporator and the accumulator 20 is naturally narrowed. Therefore, the accumulator 20 is excessively influenced by the temperature by the evaporator, which causes a problem of lowering the operation performance of the direct-cooling refrigerator.

In addition, the accumulator 20 is welded between the evaporators with a narrow gap, thereby lowering work efficiency.

In addition, since the position of the orifice hole 24 ′ in the accumulator 20 is biased to the lower portion, there is a problem in that noise is severely generated due to bubbles generated from the orifice hole 24 ′.

Accordingly, an object of the present invention for solving the above problems is to provide a direct-cooling refrigerator which is easy to install the accumulator and the accumulator can be less affected by temperature from the evaporator.

Another object of the present invention is to provide a direct-cooling refrigerator which can reduce noise caused by an orifice hole formed in an inner pipe of the accumulator.

1 is a schematic view showing a heat exchange cycle of a direct chiller according to the prior art

Figure 2 is a schematic diagram showing a cross-sectional view of the conventional direct-cooling refrigerator

Figure 3 is a longitudinal cross-sectional view showing the interior of the accumulator in the conventional direct-cooling refrigerator.

4 is a noise measurement data of the accumulator according to the prior art

5 is a schematic view showing a heat exchange cycle of a direct chiller according to the present invention

6 is a schematic view showing a flat section of the direct-cooling refrigerator according to the present invention

7 is a longitudinal sectional view showing the inside of the accumulator in the cold-cooled refrigerator according to the present invention;

8 is a noise measurement data of the accumulator according to the present invention

Explanation of symbols on the main parts of the drawings

102 ........ Compressor 104 .......... Condenser

106 .......... Capillary Building 107,107 '....... 1,2

108,108 '..... 1st and 2nd evaporator 120 .......... accumulator

122 .......... body 122a, 122b .... inlet, outlet

124 .......... Inner Pipe 124 '......... Orifice Hole

Accordingly, a feature of the present invention for achieving the above object is configured to include an accumulator installed in the inner longitudinal direction end formed between the first and second storage compartments, each of which is surrounded by a foam, and the first and second storage compartments. .

According to this configuration, the accumulator is installed in the thick portion of the foam foam not only effectively blocks heat transfer between the accumulator and the first and second evaporators, but also facilitates the installation of the accumulator. .

The height ratio of the orifice hole and the inner pipe in the accumulator is more preferably (15/54) or more (33/54) or less.

According to such a configuration, the effect that can reduce the noise generated by the bubbles discharged through the orifice hole is expected.

Hereinafter, with reference to the preferred embodiment shown in the drawings with respect to the direct-cooling refrigerator according to the present invention will be described in detail.

5 is a perspective view showing a heat exchange cycle of the direct-cooling refrigerator according to the present invention. As shown, the configuration of the thermal bridge cycle is the same as that of the prior art, which consists of the compressor 102, the condenser 104, the capillary 106, the evaporators 108, 108 'and the accumulator 120. However, it can be seen that only one accumulator 120 is installed according to the drawing. However, two accumulators 120 may be provided. However, since only one is installed, an effect of simplifying the installation work of the accumulator 120 may be expected.

And, Figure 6 is a schematic diagram showing a brief cross-sectional view of the direct-cooling refrigerator according to the present invention. As shown, it can be seen that the first and second storage chambers 107 and 107 'are formed inside the outer case 112 of the direct cooling refrigerator. First and second evaporators 108 and 108 'are wound around the first and second storage chambers 107 and 107', respectively. A foam foam 114 is formed outside the first and second storage chambers 107 and 107 'and the first and second evaporators 108 and 108'.

The first and second evaporators 108 and 108 ′ are connected to an accumulator 120 installed at a lower portion of the drawing. That is, the accumulator 120 is installed at the lower end of the space formed between the first and second evaporators 108 and 108 'and the ends of the first and second evaporators 108 and 108' are connected to the accumulator 120. will be. The accumulator 120 is installed at the lower end because the foam foam 114 formed at the lower end is thick so that the accumulator 120 does not easily perform mutual heat transfer with the evaporator.

However, the position of the accumulator 120 does not necessarily need to be installed at the lower end of the figure as shown in the figure. That is, since the accumulator 120 only needs to be mounted in a thick portion of the foam foams 114 formed on the outer sides of the first and second storage chambers 107 and 107 ', the accumulator 120 may be configured as shown in the drawings. It may be provided at the upper end of the space formed between the evaporators 108, 108 '.

In addition, Figure 7 is a longitudinal cross-sectional view showing the interior of the accumulator. As shown, inside the body 122 of the accumulator 120 having the inlet 122a and the outlet 122b of the coolant, the coolant liquid 126 is filled to a certain height, and the inlet 122a is provided. The inner pipe 124 is inserted into the accumulator 120 through the upper side and the orifice hole 124 'is formed at one side thereof.

The upper end of the inner pipe 124 is formed higher than the surface of the refrigerant liquid 126, and the orifice hole 124 ′ is locked to the refrigerant liquid 126. Therefore, noise is generated by bubbles generated from the orifice hole 124 '.

However, the height of the orifice hole 124 'according to the present invention is formed higher than before. That is, although the height ratio of the orifice hole 124 'and the inner pipe 124 was conventionally (15/54), the height ratio in this invention is formed by (33/54). As shown in the drawing, it can be seen that the remaining dimensions except for the height of the orifice hole 124 'are the same as in the related art.

8 illustrates an experimental result of measuring noise generated by the accumulator 120 when the height ratio between the orifice hole 124 'and the inner pipe 124 is 33/54. As shown, part (B) is noise measurement data of the accumulator 120, and according to the data, it can be seen that the noise is significantly reduced as compared with the related art.

Hereinafter, the operation of the direct-cooling refrigerator according to the present invention will be described in detail with reference to the preferred embodiment shown in the drawings.

First, referring to the circulation process of the refrigerant in the direct-cooling refrigerator according to the present invention, the refrigerant formed at a high temperature and high pressure in the compressor 102 is directed to the capillary tube 106 through the condenser 104 and through the capillary tube 106. Directed to evaporators 108, 108 '.

In addition, a portion of the refrigerant that has undergone heat exchange while passing through the evaporators 108 and 108 'changes to a gaseous state. In this state, the accumulator 120 enters the accumulator 120, and the accumulator 120 separates the gaseous refrigerant into the liquid refrigerant, and only the gaseous refrigerant is directed back to the compressor 102.

In this case, according to the installation position of the accumulator 120 according to the present invention is not only spaced apart from the evaporator 108, 108 'by a predetermined interval, but also to be mounted on a thick portion of the foam foam 114, which is a heat insulating material. Therefore, the accumulator 120 and the evaporators 108 and 108 'are not affected by mutual temperature.

In addition, the gaseous refrigerant in the accumulator 120 does not necessarily have to be a gaseous refrigerant to the compressor 102, but some liquid refrigerant must also be discharged through the outlet 122b of the accumulator 120. . This is because the refrigerant liquid is mixed with the oil required for the operation of the compressor 102, and the oil must be moved to the compressor 102 via the accumulator 120. At this time, the liquid refrigerant is also to exit the accumulator 120.

In addition, an orifice hole 124 'is formed in the inner pipe 124 of the accumulator 120 to smoothly discharge the liquid refrigerant and the oil. In addition, the orifice hole 124 ′ must be locked in a liquid refrigerant. Therefore, bubbles are generated in the liquid refrigerant due to the gas refrigerant discharged through the orifice hole 124 ', and noise is generated by the bubbles.

However, in the present invention, the accumulator 120 may reduce the noise to a minimum by optimizing the height of the orifice hole 124 'formed therein.

Within this technical scope of the present invention, many other modifications are possible for a person having ordinary skill in the art.

Therefore, according to the structure of the direct cooling refrigerator as described above, the following effects are expected.

First, by mounting the accumulator in the thickest part of the foam foam is expected to minimize the mutual heat transfer between the first and second evaporator and the accumulator.

In addition, by installing the accumulator at both ends rather than in the space formed between the first and second evaporators, it is expected that the installation operation of the accumulator can be easily performed.

In addition, the effect of reducing the noise generated from the accumulator is expected by optimizing the position of the orifice hole formed in the accumulator.

Claims (2)

First and second storage compartments each surrounded by a foam foam; Direct cooling refrigerator characterized in that it comprises an accumulator installed in the longitudinal end of the foam foam formed between the first and second storage compartments The direct-cooling refrigerator according to claim 1, wherein a height ratio between the orifice hole and the inner pipe in the accumulator is from 15/54 to 33/54.