HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Korean Patent Application No. 2012-74212, filed on Jul. 6, 2012 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

BACKGROUND

1. Field

Embodiments of the present disclosure relate to a refrigerator that individually cools a freezer compartment and a refrigerator compartment using two compressors and a refrigerating unit for the refrigerator.

2. Description of the Related Art

In general, a refrigerator is a home appliance that keeps food fresh by including a storage compartment for storing food and a refrigerating unit for supplying cold air to the storage compartment in a refrigerating cycle. The storage compartment is divided into a refrigerator compartment in which food is refrigerated and a freezer compartment in which food is stored in a frozen state.

The refrigerating unit includes a compressor for compressing a gas refrigerant at a high temperature under a high pressure, a condenser for condensing the compressed refrigerant into a liquid state, an expansion valve for expanding the condensed refrigerant, and an evaporator for evaporating a liquid refrigerant so as to generate cold air.

A refrigerator according to the related art circulates one refrigerating cycle using one compressor so as to cool the refrigerator compartment and the freezer compartment in different temperature ranges. Thus, the evaporator of the storage compartment is subcooled, and waste of power consumption occurs.

SUMMARY

Therefore, it is an aspect of the present disclosure to provide a refrigerator having a refrigerating unit that circulates two refrigerating cycles using two compressors.

It is another aspect of the present disclosure to provide a machine compartment heat dissipation structure of a refrigerator having a refrigerating unit that circulates two refrigerating cycles using two compressors, whereby heat generated in two refrigerating cycles may be effectively dissipated.

It is another aspect of the present disclosure to provide a machine compartment arrangement structure of a refrigerator having a refrigerating unit that circulates two refrigerating cycles using two compressors, whereby a heat dissipation effect within a limited capacity of a machine compartment may be improved.

It is another aspect of the present disclosure to provide a structure of a dual path condenser that may dissipate heat generated in two refrigerating cycles effectively.

Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the disclosure.

In accordance with one aspect of the present disclosure, there is provided a heat exchanger including a first header having an outer wall that constitutes an internal space and an opening formed in the outer wall; a second header having an outer wall that constitutes an internal space and an opening formed in the outer wall; a tube having one end inserted into the internal space of the first header through the opening of the first header and the other end inserted into the internal space of the second header through the opening of the second header so as to communicate the internal space of the first header with the internal space of the second header; heat-exchanging fins that contact the tube; and a baffle disposed in the internal space of the first header so as to partition off the internal space of the first header or disposed in the internal space of the second header so as to partition off the internal space of the second header, the baffle having a stopper formed in the baffle so as to limit an insertion depth of the tube.

The stopper may have a groove so as to accommodate portions of the tube.

The stopper may include a first support face that prevents movement in a direction in which the tube is inserted into the first and second headers, and a second support face and a third support face that are formed perpendicular to the first support face so as to prevent movement in a direction perpendicular to the insertion direction of the tube.

Each of the openings of the first and second headers may have a rectangular shape and may be formed in parallel to the first header or the second header.

Each of the openings may be sealed by the tube.

The tube may include a plurality of channels each having a predetermined width and a predetermined height, and the plurality of channels may be spaced apart from each other by a predetermined gap.

The baffle may block at least one of the plurality of channels.

The baffle may have a width that corresponds to or is larger than a width of each channel.

The first header and the second header may include position adjustment holes formed in outer walls that are opposite to the openings so as to form the baffle, and the baffle may have an insertion protrusion inserted into the position adjustment holes.

The baffle and the tube may be combined with each other by brazing.

In accordance with another aspect of the present disclosure, there is provided a heat exchanger including a header having an outer wall and an internal space formed in the outer wall; a tube having a plurality of channels through which a refrigerant flows; heat-exchanging fins that contact the tube; and a baffle disposed in the internal space of the header so as to guide a flow of the refrigerant in the internal space of the header, where an opening is formed in the outer wall of the header so that portions of the tube are inserted into the internal space of the header through the opening, and a stopper is formed in the baffle so as to limit an insertion depth of the tube.

One opening may be formed in the outer wall of the header.

In accordance with another aspect of the present disclosure, there is provided a method of manufacturing a heat exchanger, the method including preparing a header having an outer wall of which both ends are open and which has an internal space and an opening formed in parallel to the outer wall; preparing a pair of header caps for sealing both open ends of the header; preparing a tube to be inserted into the internal space of the header through the opening of the header; preparing a baffle for partitioning off the internal space of the header, the baffle having a stopper formed in the baffle so as to limit an insertion depth of the tube; preparing heat-exchanging fins that contact the tube; and combining the header, the pair of header caps, the baffle, the tube, and the heat-exchanging fins with one another by brazing.

Each of the header, the pair of header caps, the baffle, the tube, and the heat-exchanging fins may be coated with a cladding material for brazing.

The method may further include preparing the header to have a position adjustment hole formed in an outer wall that is opposite to the opening; preparing the baffle to have an insertion protrusion inserted into the position adjustment hole; and inserting the insertion protrusion into the position adjustment hole so as to adjust a position of the baffle in relation to the header.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a view illustrating a refrigerating cycle of a refrigerator according to an embodiment of the present disclosure;

FIG. 2 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view illustrating an arrangement structure of a machine compartment of the refrigerator of FIG. 2;

FIG. 4 is a cross-sectional view illustrating another arrangement structure of a machine compartment of a refrigerator according to an embodiment of the present disclosure;

FIG. 5 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator according to another embodiment of the present disclosure;

FIG. 6 is a view illustrating a state in which a heat dissipation pipe is installed at the refrigerator of FIG. 5;

FIG. 7 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator according to another embodiment of the present disclosure;

FIG. 8 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator according to another embodiment of the present disclosure;

FIG. 9 is a view illustrating a refrigerating cycle of a refrigerator according to another embodiment of the present disclosure;

FIG. 10 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator according to another embodiment of the present disclosure;

FIG. 11 is a view illustrating a dual path condenser of the refrigerator of FIG. 10;

FIG. 12 is a view illustrating the dual path condenser of the refrigerator of FIG. 11 in an A direction;

FIG. 13 is a view illustrating a state in which condensation paths of the dual path condenser of the refrigerator of FIG. 12 are unfolded;

FIG. 14 is a view for explaining a structure of a baffle of the dual path condenser of the refrigerator of FIG. 10;

FIG. 15 is a view illustrating a tube of the dual path condenser of the refrigerator of FIG. 10; and

FIG. 16 is a view for explaining the relationship between the baffle and the tube of the dual path condenser of the refrigerator of FIG. 10.

DETAILED DESCRIPTION

Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

FIG. 1 is a view illustrating a refrigerating cycle of a refrigerator 1 according to an embodiment of the present disclosure, FIG. 2 is a view illustrating an arrangement structure of a refrigerating unit of the refrigerator 1 according to an embodiment of the present disclosure, FIG. 3 is a cross-sectional view illustrating an arrangement structure of a machine compartment of the refrigerator 1 of FIG. 2, and FIG. 4 is a cross-sectional view illustrating another arrangement structure of a machine compartment of the refrigerator 1 according to an embodiment of the present disclosure.

Referring to FIGS. 1 through 4, the refrigerator 1 according to the current embodiment of the present disclosure includes a body 10, a plurality of storage compartments 21 and 22 formed in the body 10 so as to store food, and a refrigerating unit that supplies cold air to the storage compartments 21 and 22.

The body 10 may include an inner case (see 11 of FIG. 6), an outer case (see 12 of FIG. 6) combined with an outer side of the inner case 11, and a heat insulating material (see 13 of FIG. 6) disposed between the inner case 11 and the outer case 12. The plurality of storage compartments 21 and 22 are formed in the inner case 11, and the inner case 11 may be formed of a resin as one body. The outer case 12 forms the exterior of the refrigerator 1 and may be formed of a metal so as to be aesthetically appealing and durable.

The heat insulating material 13 may be a urethane foam and may be formed by injecting a urethane undiluted solution into the space between the inner case 11 and the outer case 12 after the inner case 11 and the outer case 12 are combined with each other and by foaming and hardening the urethane undiluted solution.

The body 10 may have the shape of a box having an approximately open front side. The body 10 may have an upper wall 14, a bottom wall 15, a rear wall 19, and both sidewalls 16. Also, the body 10 may have an intermediate wall 18 that partitions the inner space of the body 10 off in right and left directions. The storage compartments 21 and 22 may be divided into a right, first storage compartment 21 and a left, second storage compartment 22 by the intermediate wall 18. Obviously, the intermediate wall 18 includes the heat insulating material 13, and the first storage compartment 21 and the second storage compartment 22 may be insulated from each other.

Thus, the first storage compartment 21 and the second storage compartment 22 are disposed so that their front sides are open, the open front side of the first storage compartment 21 may be opened or closed by a first door 21a, and the open front side of the second storage compartment 22 may be opened or closed by a second door 22a. The first door 21a and the second door 22a may be hinge-coupled to the body 10 and may rotate.

The body 10 further includes a front border wall (see 17 of FIG. 8), and the first door 21a and the second door 22a closely contact the front border wall 17 so as to seal the first storage compartment 21 and the second storage compartment 22. The first door 21a and the second door 22a may include the heat insulating material 13 so as to insulate the first storage compartment 21 and the second storage compartment 22 from each other.

In this way, the refrigerator 1 according to the present embodiment may be a so-called side-by-side refrigerator in which the first storage compartment 21 is formed in a right inner side of the body 10, the second storage compartment 22 is formed in a left inner side of the body 10 and each of the compartments 21 and 22 is opened or closed by the rotating first and second doors 21a and 22a that are hinge-coupled to the body 10. Hereinafter, refrigerators according to other embodiments will be described on the assumption that they are side-by-side refrigerators. However, the spirit of the present disclosure is not limited to these side-by-side refrigerators, and any type of refrigerator having a plurality of storage compartments 21 and 22 may be used.

The first storage compartment 21 and the second storage compartment 22 may be used for different purposes. That is, the first storage compartment 21 may be used as a freezer compartment, which is maintained at a temperature of about −20° C. or less and in which food can be kept in a frozen state, and the second storage compartment 22 may be used as a refrigerator compartment, which is maintained at a temperature of about 0° C. to 5° C. and in which food can be refrigerated. Of course, the purposes of the first storage compartment 21 and the second storage compartment 22 may be changed. However, the following description is on the assumption that the first storage compartment 21 is used as a freezer compartment and the second storage compartment 22 is used as a refrigerator compartment.

The refrigerating unit of the refrigerator 1 according to the present embodiment may circulate a plurality of individual refrigerating cycles so as to individually cool the first storage compartment 21 and the second storage compartment 22. To this end, the refrigerating unit may include a first refrigerating unit that supplies cold air to the first storage compartment 21 and a second refrigerating unit that supplies cold air to the second storage compartment 22.

The first refrigerating unit may circulate a first refrigerant, and the second refrigerating unit may circulate a second refrigerant that is separate from the first refrigerant. However, names, such as the first refrigerant and the second refrigerant, are used only to differentiate refrigerants that circulate in different refrigerating cycles through different refrigerating units from each other, and it does not mean that the types of the first refrigerant and the second refrigerant are different from each other. That is, the first refrigerant and the second refrigerant may be of the same type or different types. For example, the first refrigerant and the second refrigerant may be one selected from the group including R-134a, R-22, R-12, and ammonia.

The first refrigerating unit may include a first compressor 32 for compressing the first refrigerant at a high temperature under a high pressure, a first condenser 33 for condensing the first refrigerant from a gaseous state to a liquid state, a first expansion valve 34 for expanding the first refrigerant at a low temperature under a low pressure, a first evaporator 35 for evaporating the first refrigerant from a liquid state to a gaseous state, a first refrigerant pipe 36 for guiding the first refrigerant to elements of the first refrigerating unit successively, and a first blower fan 37 that forcibly causes the air of the first storage compartment 21 to flow.

Here, the first evaporator 35 may evaporate the first refrigerant and may take peripheral latent heat so as to generate cold air, and the generated cold air may be supplied to the first storage compartment 21 through the first blower fan 37.

The first compressor 32 may be a hermetic reciprocation acting compressor, and the first condenser 33 may be an air-cooled condenser having heat dissipation fins and a tube.

The first compressor 32 and the first condenser 33 may be disposed in a machine compartment 23 formed in a lower portion of the body 10. The machine compartment 23 is partitioned off from the storage compartments 21 and 22 and is insulated therefrom.

One side of the machine compartment 23 is open, and a machine compartment cover 25 may be detachably combined with the open side of the machine compartment 23. Ventilators 26a and 26b may be formed in the machine compartment cover 25. The ventilators 26a and 26b may include an inlet 26a through which the air is introduced and an outlet 26b through which the air flows out. A machine compartment blower fan 24 may be disposed in the machine compartment 23.

The second refrigerating unit may include a second compressor 42 for compressing the second refrigerant at a high temperature under a high pressure, a second condenser 43 for condensing the second refrigerant from a gaseous state to a liquid state, a second expansion valve 44 for expanding the second refrigerant at a low temperature under a low pressure, a second evaporator 45 for evaporating the second refrigerant from a liquid state to a gaseous state, a second refrigerant pipe 46 for guiding the second refrigerant to elements of the second refrigerating unit successively, and a second blower fan 47 that forcibly causes the air of the second storage compartment 22 to flow.

Here, the second evaporator 45 may evaporate the second refrigerant and may take peripheral latent heat so as to generate cold air. The generated cold air may be supplied to the second storage compartment 22 through the second blower fan 47.

Here, the second compressor 42 may be a hermetic reciprocation acting compressor that is the same as the first compressor 32. However, the second compressor 42 has a smaller load than the first compressor 32 and thus may have a smaller size than the first compressor 32. Also, the second compressor 42 may be disposed in the machine compartment 23 together with the first compressor 32 and the first condenser 33. The second compressor 42 may be cooled by forcible flow of air caused by the machine compartment blower fan 24 together with the first compressor 32 and the first condenser 33.

The second condenser 43 may not be disposed in the machine compartment 23, unlike the first compressor 32, the first condenser 33, and the second compressor 42. Also, the second condenser 43 may be a heat dissipation pipe 43a, unlike the first condenser 33. No additional heat dissipation fins may be attached to the heat dissipation pipe 43a. Instead, the heat dissipation pipe 43a may have a shape that is bent in a zigzag form several times, so as to increase a heat dissipation area.

The heat dissipation pipe 43a may be disposed on an outer side of the rear wall 19 of the body 10 so as to be exposed to the outside, as illustrated in FIG. 2. Furthermore, the heat dissipation pipe 43a may be attached to the outer surface of the outer case 12 so that heat of the heat dissipation pipe 43a can be transferred to the outer case 12 and the heat dissipation area can be further increased. The heat dissipation pipe 43a may be cooled by natural convection of air.

In this way, not all of the first compressor 32, the first condenser 33, the second compressor 42, and the second condenser 43 are disposed in the machine compartment 23 but the first compressor 32, the first condenser 33, and the second compressor 42 are disposed in the machine compartment 23, and the second condenser 43 is disposed outside the machine compartment 23 so that complexity of the machine compartment 23 can be avoided and a heat dissipation effect can be improved.

Of course, by increasing the space of the machine compartment 23, all of the first compressor 32, the first condenser 33, the second compressor 42, and the second condenser 43 may be disposed in the machine compartment 23; however, this causes a reduction in the space of the storage compartments 21 and 22 compared to the size of the body 10 and thus is not preferable.

The internal arrangement of the machine compartment 23 may be configured in such a way that the first compressor 32 is disposed at one side of the inside of the machine compartment 23 and the second compressor 42 is disposed at the other side of the inside of the machine compartment 23, as illustrated in FIGS. 2 and 3. That is, the first compressor 32 may be disposed to be slanted toward one sidewall 16a of the machine compartment 23 from the center of the inside of the machine compartment 23, and the second compressor 42 may be disposed to be slanted toward the other sidewall 16b of the machine compartment 23 from the center of the inside of the machine compartment 23.

As illustrated in FIGS. 2 and 3, the first compressor 32 is disposed at a lower side of the first storage compartment 21, and the second compressor 42 is disposed at a lower side of the second storage compartment 22. However, aspects of the present disclosure are not limited thereto, and the positions of the first compressor 32 and the second compressor 42 may be changed. However, in consideration of a load applied to the bottom wall 15, it is sufficient if the first compressor 32 and the second compressor 42 are disposed at both sides of the machine compartment 23.

In addition, the first condenser 33 and the machine compartment blower fan 24 may be disposed between the first compressor 32 and the second compressor 42 in approximately one straight line. In FIGS. 2 and 3, the first compressor 32, the machine compartment blower fan 24, the first condenser 33, and the second compressor 42 are successively disposed. However, unlike this, the first compressor 32, the first condenser 33, the machine compartment blower fan 24, and the second compressor 42 may be successively disposed, as illustrated in FIG. 4.

In this case, the machine compartment blower fan 24 may include fan wings 24a that forcibly cause the air to flow and a fan motor 24b that drives the fan wings 24a. The machine compartment blower fan 24 may be an axial flow fan in which a direction of wind is the same as a direction of a rotation shaft.

Also, the wind direction of the machine compartment 23 may be directed from the second compressor 42 toward the first compressor 32. That is, the air that is introduced into the machine compartment 23 through the inlet 26a may cool the second compressor 42, the first condenser 33, and the first compressor 32 successively and may flow out from the machine compartment 23 through the outlet 26b.

That is, in the arrangement structure of FIG. 3, the machine compartment blower fan 24 absorbs the air from the first condenser 33 and ejects the air toward the first compressor 32, and in the arrangement structure of FIG. 4, the machine compartment blower fan 24 absorbs the air from the second compressor 42 and ejects the air toward the first condenser 33.

Due to this air flow direction, heat dissipation of the first compressor 32 (freezer compartment) having a relatively larger amount of heat generation than the second compressor 42 can be prevented from affecting heat dissipation of the first condensers 33 and the second compressor 42 (refrigerator compartment), and energy consumed for heat dissipation of the machine compartment 23 can be reduced. Thus, damage caused by a lowered heat exchange efficiency of the first condenser 33 and overload of the second compressor 42 can be prevented.

FIG. 5 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator 2 according to another embodiment of the present disclosure, and FIG. 6 is a view illustrating a state in which a heat dissipation pipe is installed at the refrigerator 2 of FIG. 5.

The arrangement structure of a refrigerating unit of the refrigerator 2 according to another embodiment of the present disclosure will be described with reference to FIGS. 5 and 6. Like reference numerals are used for like elements from FIGS. 1 through 4, and the description thereof may be omitted.

The refrigerating unit of the refrigerator 2 according to the present embodiment has the same configuration as the refrigerator 1 of FIG. 1 except for the position of a second compressor.

That is, the second condenser is configured as a heat dissipation pipe 43b, and the heat dissipation pipe 43b may be disposed in a rear wall 19 of a body 10, unlike in FIGS. 1 through 4.

In detail, the heat dissipation pipe 43b may be disposed between an inner case 11 and an outer case 12 of the rear wall 19. In particular, the heat dissipation pipe 43b may be disposed to contact the inner surface of the outer case 12. In this case, the heat dissipation pipe 43b may be attached to the inner surface of the outer case 12 using an aluminum tape 20 having high thermal conductivity.

Thus, heat of a refrigerant that passes through the heat dissipation pipe 43b may be transferred to the outer case 12 via the aluminum tape 20 or may be dissipated through the outer case 12 by natural convection of air. Also, heat of the refrigerant that passes through the heat dissipation pipe 43b may be prevented from being transferred to the inner case 11 using a heat insulating material 13. Thus, the risk of heat of the heat dissipation pipe 43b penetrating into storage compartments 21 and 22 can be prevented.

The heat dissipation pipe 43b may be attached to the inner surface of the outer case 12 using the aluminum tape 20 before the inner case 11 and the outer case 12 are combined with each other, and after the inner case 11 and the outer case 12 are combined with each other, the heat dissipation pipe 43b may be firmly supported by the heat insulating material 13 that foams and is hardened in the space between the inner case 11 and the outer case 12.

In this manner, the heat dissipation pipe 43b is disposed between the inner case 11 and the outer case 12 and thus may not be exposed to the outside. Thus, a sufficient arrangement space of the refrigerator 2 compared to the refrigerator 1 of FIG. 1 can be obtained, and the appearance of the refrigerator 2 can be improved.

FIG. 7 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator 3 according to another embodiment of the present disclosure, and FIG. 8 is a view illustrating an arrangement structure of a refrigerating unit of a refrigerator 4 according to another embodiment of the present disclosure.

The arrangement structure of the refrigerating unit of the refrigerator 3 according to another embodiment of the present disclosure and the arrangement structure of the refrigerating unit of the refrigerator 4 according to another embodiment of the present disclosure will be described with reference to FIGS. 7 and 8. Like reference numerals are used for like elements from FIGS. 1 through 4 and FIGS. 5 and 6, and the description thereof may be omitted.

As illustrated in FIG. 7, a second condenser of the refrigerator 3 according to the present embodiment is configured as a heat dissipation pipe 43c, and the heat dissipation pipe 43c may be disposed on both sidewalls 16 of a body 10.

As in FIGS. 5 and 6, the heat dissipation pipe 43c may be disposed between an inner case (see 11 of FIG. 5) and an outer case (see 12 of FIG. 5), may be attached to the inner surface of the outer case 12 using an aluminum tape (see 20 of FIG. 5), and may be supported by a heat insulating material (see 13 of FIG. 5).

As illustrated in FIG. 8, a second condenser of the refrigerator 4 according to the present embodiment is configured as a heat dissipation pipe 43d, and the heat dissipation pipe 43d may be disposed on a front border wall 17 of the body 10.

As in FIGS. 5-7, the heat dissipation pipe 43d may be disposed between an inner case (see 11 of FIG. 5) and an outer case (see 12 of FIG. 5), may be attached to the inner surface of the outer case 12 using an aluminum tape (see 20 of FIG. 5), and may be supported by a heat insulating material (see 13 of FIG. 5). In this case, the heat dissipation pipe 43d may perform the function of preventing frost formation on the front border wall 17 due to a temperature change caused by opening/closing doors 21a and 22a. In FIG. 8, the heat dissipation pipe 43d is disposed only in a place at which the second door 22a closely contacts the front border wall 17. However, of course, the heat dissipation pipe 43d may extend and may be installed at a place at which the first door 21a closely contacts the front border wall 17.

As above, configurations and arrangements of the refrigerating units illustrated in FIGS. 1 through 8 have been described. In this way, the first compressor 32, the first condenser 33, and the second compressor 42 are cooled by forcible flow of air caused by the machine compartment blower fan 24, and the second condenser 43 is disposed outside the machine compartment 23 and is cooled by natural convection of air. Thus, cooling in a plurality of refrigerating cycles that are individually circulated can be effectively performed, the refrigerating units can be disposed without increasing the capacity of the machine compartment 23, and energy consumed for heat dissipation of the machine compartment 23 can be reduced.

FIG. 9 is a view illustrating a refrigerating cycle of a refrigerator 5 according to another embodiment of the present disclosure, and FIG. 10 is a view illustrating an arrangement structure of a refrigerating unit of the refrigerator 5 according to another embodiment of the present disclosure.

The refrigerating cycle of the refrigerator 5 and the structure of the refrigerating unit according to another embodiment of the present disclosure will be described with reference to FIGS. 9 and 10. Like reference numerals are used for like elements from FIGS. 1 through 8, and the description thereof may be omitted.

The refrigerating unit of the refrigerator 5 according to the present embodiment may also circulate a plurality of individual refrigerating cycles so as to individually cool a first storage compartment 21 and a second storage compartment 22, as illustrated in FIGS. 1 through 8. To this end, the refrigerating unit may include a first refrigerating unit for supplying cold air to the first storage compartment 21 and a second refrigerating unit for supplying cold air to the second storage compartment 22. The first refrigerating unit may circulate a first refrigerant, and the second refrigerating unit may circulate a second refrigerant that is separate from the first refrigerant.

The first refrigerating unit may include a first compressor 32, a dual path condenser 101, a first expansion valve 34, a first evaporator 35, a first blower fan 37, and a first refrigerant pipe 36, and the second refrigerating unit may include a second compressor 42, a dual path condenser 101, a second expansion valve 44, a second evaporator 45, a second blower fan 47, and a second refrigerant pipe 46.

That is, the first refrigerating unit and the second refrigerating unit may share the dual path condenser 101 for condensing the refrigerant. The dual path condenser 101 may be a condenser in which a plurality of condensers are integrated with each other, so as to increase space utility and heat exchange efficiency. The dual path condenser 101 may include a first condensation path (see 141 of FIG. 13) through which the first refrigerant passes, and a second condensation path (see 142 of FIG. 3) through which the second refrigerant passes and may condense both the first refrigerant and the second refrigerant. Here, the first condensation path 141 and the second condensation path 142 are individually formed. The detailed configuration of the dual path condenser 101 will be described again later.

As illustrated in FIGS. 9 and 10, the dual path condenser 101 may be disposed in a machine compartment 23 together with the first compressor 32 and the second compressor 42. Since both the first refrigerant in a first refrigerating cycle and the second refrigerant in a second refrigerating cycle may be condensed by the dual path condenser 101, no additional condenser other than the dual path condenser 101 may be required in the refrigerator 5 illustrated in FIGS. 9 and 10.

The internal arrangement of the machine compartment 23 may be the same as those of FIGS. 1 through 8. That is, the first compressor 32 and the second compressor 42 may be disposed at both sides of the machine compartment 23, and the dual path condenser 101 may be disposed between the first compressor 32 and the second compressor 42. A machine compartment blower fan 24 may allow air to flow in directions of the second compressor 42, the dual path condenser 101, and the first compressor 32.

FIG. 11 is a view illustrating a dual path condenser 101 of the refrigerator 5 of FIG. 10, FIG. 12 is a view illustrating the dual path condenser of the refrigerator of FIG. 11 in an A direction, FIG. 13 is a view illustrating a state in which condensation paths of the dual path condenser of the refrigerator of FIG. 12 are unfolded, FIG. 14 is a view for explaining a structure of a baffle of the dual path condenser 101 of the refrigerator 5 of FIG. 10, FIG. 15 is a view illustrating a tube of the dual path condenser 101 of the refrigerator 5 of FIG. 10, and FIG. 16 is a view for explaining the relationship between the baffle and the tube of the dual path condenser 101 of the refrigerator 5 of FIG. 10.

The configuration of the dual path condenser 101 according to the present disclosure will be described with reference to FIGS. 11 through 16 in detail. As illustrated in FIG. 11, the dual path condenser 101 includes a plurality of headers 111 and 112 through which a refrigerant is introduced or flows out, a stacked flat tube 121 that allows the space between the plurality of headers 111 and 112 to communicate, and heat dissipation fins 150 that contact the tube 121.

The plurality of headers 111 and 112 include a first header 111 and a second header 112, and a first inlet 131 through which a first refrigerant is introduced, a second inlet 133 through which a second refrigerant is introduced, and a second outlet 134 through which the second refrigerant flows out may be disposed at the first header 111. A first outlet 132 through which the first refrigerant flows outs may be disposed at the second header 112.

Obviously, as illustrated in FIG. 10, the first inlet 131 may be connected to the first compressor 32, the first outlet 132 may be connected to the first expansion valve 34, the second inlet 133 may be connected to the second compressor 42, and the second outlet 134 may be connected to the second expansion valve 144.

Also, as illustrated in FIG. 13, the dual path condenser 101 includes a first condensation path 141 on which the first refrigerant introduced through the first inlet 131 is condensed and is guided to the first outlet 132, and a second condensation path 142 on which the second refrigerant introduced through the second inlet 133 is condensed and is guided to the second outlet 134. The first condensation path 141 and the second condensation path 142 are separately formed so that mixing of the first refrigerant and the second refrigerant may be prevented.

The first condensation path 141 and the second condensation path 142 may be formed by internal spaces 111f and 112f of the headers 111 and 112 and channels 123 of the tube 121.

In detail, the first header 111 has an outer wall 111a of which both ends are open and which has the internal space 111f, and an opening 111b that is formed in parallel to the outer wall 111a and communicates with the internal space 111f. In this case, one opening 111b may be formed and may be sealed by the tube 121. Header caps 111d and 111e may be combined with both open ends of the first header 111 and may be sealed.

Similarly, the second header 112 also has the same configuration as the first header 111, i.e., has an outer wall 112a of which both ends are open and which has the internal space 112f, and an opening 112b that is formed in parallel to the outer wall 112a and communicates with the internal space 112f. In this case, one opening 112b may be formed and may be sealed by the tube 121. Header caps 112d and 112e may be combined with both open ends of the second header 112.

The tube 121 is an integrated flat tube having a plurality of channels 123, and predetermined portions of both ends of the tube 121 are inserted into the internal space 111f of the first header 111 and the internal space 112f of the second header 112 through the opening 111b of the first header 111 and the opening 112b of the second header 112.

In this case, the insertion depth of the tube 121 may be limited by a baffle 160 disposed at the headers 111 and 112. The baffle 160 is disposed in the internal spaces 111f and 112f of the headers 111 and 112 so as to partition off the internal spaces 111f and 112f of the headers 111 and 112 and to guide the flow of the refrigerant. Since the cross-section of the first header 111 is shown in FIG. 13, referring to FIG. 13, a stopper (see 161 of FIG. 17) is formed in the baffle 160 so as to limit the insertion depth of the tube 121.

The stopper 161 may have the shape of a groove that is depressed toward the inside of the stopper 161 so as to accommodate portions of the tube 121. The stopper 161 may include a first support face 161a that prevents movement in a direction in which the tube 121 is inserted into the headers 111 and 112, and a second support face 161b and a third support face 161c that prevent movement in a direction perpendicular to the insertion direction of the tube 121.

The baffle 160 may have an insertion protrusion 162 so as to be combined with the headers 111 and 112, and position adjustment holes 111c and 112c through which the insertion protrusion 162 may be inserted are formed in outer walls 111a and 112a that are opposite to the openings 111b and 112b of the headers 111 and 112. Thus, after the position of the baffle 160 is adjusted by inserting the insertion protrusion 162 of the baffle 160 into the position adjustment holes 111c and 112c of the headers 111 and 112, the baffle 160 and the headers 111 and 112 may be combined with each other by brazing.

The tube 121 is formed as one body, as illustrated in FIG. 15, and may include a flat type body 122 and the plurality of channels 123 through which the refrigerant flows and which are formed on the body 122. The heat dissipation fins 150 contact the body 122. Each of the heat dissipation fins 150 may be disposed to have a width corresponding to the width of the tube 121 so as to effectively dissipate heat transferred to the entire body 122.

Each of the plurality of channels 123 of the tube 121 may be formed to have a predetermined width WC and a predetermined height HC and may have a simple shape with a uniform gap GC.

In this case, ends of the tube 121 are inserted into the internal spaces 111f and 112f of the headers 111 and 112. Since the inserted tube 121 is naturally supported by the baffle 160, no additional shape for this support is necessary and thus the tube 121 can be easily manufactured.

As illustrated in FIG. 13, portions 124 of the plurality of channels 123 constitute portions of the first condensation path 141. This is referred to as a first channel portion 124. Also, the other portions 125 of the channels 123 constitute portions of the second condensation path 142. This is referred to as a second channel portion 125. Thus, the first channel portion 124 is formed at portions of the body 122, and the second channel portion 125 is formed at the other portions of the body 122.

Here, when the second refrigerating unit does not operate and only the first refrigerating unit operates, i.e., when the refrigerant does not flow through the second channel portion 125 and flows only through the first channel portion 124, heat of the refrigerant is transferred to the entire body 122 and may be dissipated through the entire body 122. That is, even when the refrigerant flows only through the first channel portion 124, heat of the refrigerant is transferred to portions of the body 122 that constitute the first channel portion 124 and the other portions of the body 122 that constitute the second channel portion 125 such that heat dissipation can be performed through the entire body 122.

In contrast, when the first refrigerating unit does not operate and only the second refrigerating unit operates, i.e., when the refrigerant does not flow through the first channel portion 124 and flows only through the second channel portion 125, heat of the refrigerant is transferred to the entire body 122. Thus, heat dissipation can be performed through the entire body 122.

Thus, since heat dissipation is performed through the entire body 122 in either case, a heat dissipation area can be increased, and as such, a heat dissipation effect can be improved. Of course, when the first refrigerating unit and the second refrigerating unit operate simultaneously and the refrigerant flows through the first channel portion 124 and the second channel portion 125 simultaneously, the effect of increasing the heat dissipation area may be cancelled out.

Furthermore, even when the refrigerant flows through one of the first channel portion 124 and the second channel portion 125, heat of the refrigerant is transferred to the entire body 122 and thus may be dissipated through all of the heat dissipation fins 150 that contact the body 122.

Unlike the integrated tube according to the present embodiment, when a plurality of tubes that are separated from each other are used and the plurality of tubes constitute different condensation paths, the heat dissipation fins 150 contact all of the plurality of tubes so that the effect of increasing the heat dissipation area of the present embodiment can be expected. That is, even when the plurality of tubes are separated from each other, heat may be transferred to the entire body 122 through the heat dissipation fins 150.

Some of the plurality of channels 123 of the tube 121 may be blocked by the baffle 160. In FIG. 13, channels 123a that are blocked by the baffle 160 are shaded in. In this way, the channels 123a that are blocked by the baffle 160 may not constitute any of the first condensation path 124 and the second condensation path 125.

Since the refrigerant may be introduced through the blocked channels 123a and outlets of the blocked channels 123a are blocked by the baffle 160, the flow of the refrigerant does not occur and may be stopped. Of course, even though the channels 123a to be blocked by the baffle 160 may be pre-blocked when the tube 121 is manufactured, this causes an increase in material cost. Thus, it is effective in view of cost and convenience of processing to, as in the present embodiment, manufacture the tube 121 in such a way that the plurality of channels 123 are formed to the predetermined width WC and the uniform gap GC and to block the channels 123a using the baffle 160.

To this end, the width (see WB of FIG. 16) of the baffle 160 needs to correspond to or to be larger than the width (see WC of FIG. 16) of each channel 123.

All of the elements of the dual path condenser 101 having the above configuration may be combined with each other by brazing so as to prevent water leakage of the refrigerant. That is, all of the headers 111 and 112, the header caps 111d, 111e, 112d, and 112e, the baffle 160, the tube 121, and the heat dissipation fins 150 may be coated with a cladding material for brazing.

Thus, the baffle 160 is temporarily combined with the internal spaces 111f and 112f of the headers 111 and 112, the header caps 111d, 111e, 112d, and 112e are put on both open ends of the headers 111 and 112, the tube 121 is inserted into the headers 111 and 112, and the heat dissipation fins 150 are disposed between the tubes 121 and then put into a brazing furnace, thereby manufacturing the dual path condenser 101.

When the temporarily-manufactured dual path condenser 101 is heated at a temperature of about 600° C. to 700° C. in the brazing furnace, the cladding material coated on the elements of the dual path condenser 101 is melted so that joints of the elements are sealed and simultaneously the elements are firmly joined. Thus, the joints of the elements are required to be formed with a predetermined gap so as to seal spaced gaps using the melted cladding material.

Here, temporarily forming the baffle 160 in the internal spaces 111f and 112f of the headers 111 and 112 may be easily performed by inserting the insertion protrusion 162 of the baffle 160 into the position adjustment holes 111c and 112c of the headers 111 and 112.

Obviously, the structure of the dual path condenser 101 according to the current embodiment of the present disclosure does not apply only to a condenser but may apply to an evaporator, a refrigerator, and an air conditioner.

As described above, the refrigerating unit of FIG. 10 is a refrigerating unit that circulates a plurality of refrigerating cycles individually. The refrigerating unit of FIG. 10 includes the plurality of individual condensation paths 141 and 142, the tube 121 that is formed as one body so as to dissipate heat of the refrigerant through the entire body even when the refrigerant flows through one of the plurality of condensation paths 141 and 142, and the dual path condenser 101 having the integrated heat dissipation fins 150.

Therefore, all heat generation elements may be disposed in a machine compartment 23 having a limited capacity, a heat dissipation efficiency of a plurality of refrigerating cycles can be improved, and energy consumed for heat dissipation can be reduced.

According to the spirit of the present disclosure, since a refrigerator circulates two refrigerating cycles individually using two compressors, a freezer compartment and a refrigerator compartment are cooled in different temperature ranges so that power consumption can be reduced.

In this case, heat generated in two refrigerating cycles can be effectively dissipated.

Also, since two compressors and one condenser are disposed in a machine compartment, the machine compartment can be easily arranged.

In particular, using a dual path condenser having two condensation paths that are individually formed, two refrigerating cycles can be circulated using one condenser so that the space utility of the machine compartment can be increased.

Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME

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CPC

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