KR20090033743A - Fin-tube type heat exchanger - Google Patents

Fin-tube type heat exchanger Download PDF

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Publication number
KR20090033743A
KR20090033743A KR1020070098925A KR20070098925A KR20090033743A KR 20090033743 A KR20090033743 A KR 20090033743A KR 1020070098925 A KR1020070098925 A KR 1020070098925A KR 20070098925 A KR20070098925 A KR 20070098925A KR 20090033743 A KR20090033743 A KR 20090033743A
Authority
KR
South Korea
Prior art keywords
heat exchange
air
heat exchanger
sucked
refrigerant
Prior art date
Application number
KR1020070098925A
Other languages
Korean (ko)
Inventor
한병윤
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020070098925A priority Critical patent/KR20090033743A/en
Publication of KR20090033743A publication Critical patent/KR20090033743A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/124—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Abstract

Finned tube heat exchanger is disclosed.

The disclosed fin tube heat exchanger includes: a plurality of heat exchange fins arranged in parallel with respect to a direction in which air is sucked; Coupling holes formed in the heat exchange fins and arranged alternately in a direction in which air is sucked; A plurality of refrigerant pipes inserted into the coupling holes and passing through the heat exchange fins; And connecting tubes connecting the plurality of refrigerant tubes to one tube, wherein the refrigerant tubes are coupled to the coupling hole by expanding their diameters.

According to the disclosed fin tube type heat exchanger, the intake air is mixed with the coolant tube evenly and frictionally by arranging the coolant tubes passing through the heat exchange fins arranged in parallel with respect to the direction in which the air is sucked, alternately along the direction in which the air is sucked. There is an advantage that the heat exchange efficiency is improved.

In addition, by expanding the diameter of the refrigerant pipe to be coupled to the coupling hole formed in the heat exchange fins there is an advantage that the coupling state is improved to improve the heat exchange efficiency.

Description

Fin tube type heat exchanger {FIN-TUBE TYPE HEAT EXCHANGER}

The present invention relates to a heat exchanger, and more particularly, to a fin tube type heat exchanger, which is used in a heat exchanger such as a refrigerator or an air conditioner, and has a plurality of heat exchanger fins arranged in parallel and a refrigerant tube passing through it several times in multiple stages. will be.

In general, a heat exchanger refers to a device for transferring heat from a high temperature fluid to a low temperature fluid through a heat transfer wall such as a metal plate. Such heat exchangers are widely used as heaters, preheaters, coolers, evaporators, condensers, etc., depending on the purpose of use.

In particular, the heat exchanger applied to the refrigeration cycle is a device that allows the heat exchange between the air passing through the outside of the heat exchange fins and the refrigerant flowing inside the refrigerant pipe, a plurality of heat exchange fin groups in which a plurality of heat exchange fins are arranged in parallel There is an integrated fin type in which a split fin type arranged in a multi-stage structure and a plurality of heat exchange fins are arranged in parallel in one stage.

In addition, according to the arrangement of the refrigerant pipe, the refrigerant pipe is arranged in parallel with the direction in which the air is sucked in (IN LINE TYPE) and the inclined type in which the refrigerant pipe is arranged alternately in the direction in which the air is sucked (CANTED TYPE) There is this.

However, the various types of heat exchangers described above have the following problems.

That is, in the case of the straight line, since the refrigerant pipes are arranged side by side in the direction in which air is sucked, air that hits the refrigerant pipe located in front along the direction in which air is sucked does not hit the refrigerant pipe located immediately next. There is a problem in that, resulting in a bad heat exchange efficiency.

On the other hand, in the case of the inclined type, a predetermined length of the refrigerant pipe is bent several times to form a fin tube type heat exchanger, and the bent refrigerant pipe is formed so as to form a coupling hole corresponding to the bent row of the refrigerant pipe in the heat exchange fin so as to be inserted. . The coupling hole is formed in a long hole shape extending in the upward direction so that the bending portion of the refrigerant pipe is inclined. Then, after arranging a plurality of heat exchange fins in parallel, the bent refrigerant tube is inserted into the coupling hole to combine the refrigerant tube and the heat exchange fins.

As a result, the refrigerant pipes are fitted into the coupling holes formed in the heat exchange fins to be coupled to each other, so that the coupling portions are not completely tightly coupled, thereby degrading heat transfer efficiency to the heat exchange fins.

In addition, since the coupling hole is formed in a long hole shape, only a part of the outer circumferential surface of the refrigerant pipe is combined with the heat exchange fins, thereby degrading heat transfer efficiency to the heat exchange fins.

The present invention is to solve the above-described problems, an object of the present invention is to provide a fin tube type heat exchanger that improves the heat exchange efficiency by improving the coupling state between the heat exchange fin and the refrigerant pipe and the arrangement of the refrigerant pipe.

One object of the present invention described above, the plurality of heat exchange fins arranged in parallel with respect to the direction in which air is sucked; Coupling holes formed in the heat exchange fins and arranged alternately in a direction in which air is sucked; A plurality of refrigerant pipes inserted into the coupling holes and penetrating the heat exchange fins; And connecting tubes connecting the plurality of refrigerant tubes to one tube, wherein the refrigerant tubes are coupled to the coupling hole by expanding their diameters.

The circumference of the coupling hole, characterized in that the bent portion bent in parallel to the refrigerant pipe is formed.

The connecting pipe is characterized in that for connecting the plurality of refrigerant pipe by welding.

The coolant pipe has an elliptical cross section, and the long axis thereof is provided to be the same as the direction in which air is sucked.

The cross section of the refrigerant pipe is characterized in that the ratio between the short axis and the long axis is 1: 1.5 to 2.0.

The connecting pipe is characterized in that for connecting the two refrigerant pipes adjacent to each other along the direction in which air is sucked.

The connecting pipe is characterized in that it is provided in a U-shape.

The coupling hole is characterized in that the imaginary line connecting two adjacent coupling holes along the direction in which the air is sucked are staggered to form +30 degrees or -30 degrees with respect to the direction in which the air is sucked.

According to the fin tube type heat exchanger of the present invention according to the above-described configuration,

By arranging the refrigerant pipes passing through the heat exchange fins arranged in parallel with respect to the direction in which the air is sucked and staggering each other along the direction in which the air is sucked, the suction air is mixed with the refrigerant pipe and mixed with the refrigerant pipe, thereby improving heat exchange efficiency. .

In addition, by expanding the diameter of the refrigerant pipe to be coupled to the coupling hole formed in the heat exchange fins there is an advantage that the coupling state is improved to improve the heat exchange efficiency.

In addition, the cross section of the refrigerant tube is provided in an elliptical shape and the long axis is parallel to the suction direction of the air to improve the pressure drop of the air passing through the fin tube heat exchanger to lower the power consumption, so that the air suction is more smoothly This has the advantage.

Hereinafter, with reference to the accompanying drawings for an embodiment of the present invention fin tube type heat exchanger will be described in detail.

In the description, it is limited to the heat exchanger installed in the refrigerator, but the fin tube type heat exchanger of the present invention will be apparent to those skilled in the art that it can be widely used in a heat exchanger such as a refrigerating device or an air conditioner.

1 is a view schematically showing a fin tube type heat exchanger installed in a refrigerator according to an embodiment of the present invention.

As shown in FIG. 1, the refrigerator 10 includes a barrier 11 partitioning the refrigerating compartment 12 and the freezing compartment 13 up and down, and a refrigerating compartment door for opening and closing the refrigerating compartment 12 and the freezing compartment 13. 14 and the freezer compartment door 15, the evaporator 100 and the blower fan 18, which are provided on the rear wall of the freezer compartment 13 and supply cold air to the freezer compartment 13 and the refrigerating compartment 12, and the blower fan ( A cold air supply duct 20 is provided inside the wall of the refrigerator to guide the cold air discharged by 18 to the refrigerating chamber 12 and the freezing chamber 13.

In addition, the refrigerator 10 is installed on the inside of the refrigerating compartment door 14, the ice-making apparatus for supplying the cold air supplied through the cold air inlet 24 formed at the lower end of the iced water supplied to keep the iced ice ( 30) may be provided.

Here, the evaporator 100 is provided with a fin tube type heat exchanger according to an embodiment of the present invention.

This will be described in detail with reference to FIGS. 2 and 3.

2 is a perspective view showing a fin tube type heat exchanger according to an embodiment of the present invention, Figure 3 is an exploded perspective view of a fin tube type heat exchanger according to an embodiment of the present invention.

2 and 3, the fin tube type heat exchanger 100 according to an embodiment of the present invention, a plurality of heat exchange fins 110 arranged in parallel with respect to the direction in which air is sucked, the heat exchange fins A plurality of refrigerant pipes 130 and the plurality of refrigerant pipes 130 formed in the 110 and arranged in a staggered direction along the direction in which air is sucked, inserted into the coupling holes 120 and penetrating the heat exchange fins 110. It comprises a connecting pipe 140 for connecting the refrigerant pipe 130 of the one pipe. In addition, the refrigerant pipes 130 are coupled to the coupling holes 120 by expanding their diameters.

Meanwhile, arrows A in FIG. 2 and FIG. 3 indicate directions in which air is sucked.

First, the heat exchange fins 110 are provided with a plurality of thin plates in parallel to the direction in which the target fluid for heat exchange is sucked.

The heat exchange fins 110 are provided with a plurality of coupling holes 120 to which the coolant tubes 130 are coupled, and each heat exchange fin 110 is formed by the number of coolant tubes 130. That is, it is provided with an integrated heat exchange fin.

In addition, the interval provided with the plurality of heat exchange fins 110, the pressure drop amount generated as the air sucked in passing between the heat exchange fins 110 and the amount of heat transfer between the sucked air and the heat exchange fins 110 as a parameter The optimum interval can be obtained by experiment.

On the other hand, at both ends of the heat exchange fins 110, a fixing groove 111 for fixing the defrost heater 150 is provided to remove the frost generated in the heat exchange fins (110).

Next, the coupling holes 120 are formed in the heat exchange fins 110 in the same number as the number of the refrigerant pipes 130 and are alternately arranged in the air suction direction.

That is, the coupling hole 120 has a predetermined inclination (θ) in a direction in which the virtual line α connecting two adjacent coupling holes 120a and 120b along the direction A is sucked with air. Are staggered to have In addition, the two coupling holes 120 are arranged side by side along the direction in which air is sucked in one unit.

Here, the predetermined inclination θ is preferably arranged to form +30 degrees or -30 degrees.

In addition, the coupling hole 120, a bent portion 121 bent in parallel to the refrigerant pipe 130 may be formed around the.

The bent portion 121 is formed to be bent the edge of the coupling hole 120 is formed to extend perpendicular to the heat exchange fin (110).

The bent portion 121 serves to seat the coolant tube 130 to the coupling hole 120, and the coolant tube 130 and the heat exchange fin 110 are formed by the bent portion 121. ) Is improved.

Next, the refrigerant pipe 130 is provided with a plurality of hollow tubes to allow the refrigerant to flow therein. Each tube is fitted one by one in the coupling hole 120 alternately formed in the heat exchange fin (110). In addition, the plurality of refrigerant pipes 130 are connected to one pipe by a connection pipe 140 to be described later.

In addition, the cross section of the refrigerant pipe 130 is preferably provided to have an elliptical cross section having a long axis (a) and a short axis (b).

Here, the refrigerant pipe 130 is preferably provided with a long axis (a) of the elliptical cross-section side by side in the flow direction of the intake air.

The reason is that when the cross section of the refrigerant pipe 130 is provided in a circular shape, the suction air does not pass through the rear portion of the refrigerant pipe 130 along the flow direction of the suction air, thereby reducing heat exchange efficiency, and This is because the pressure drop of the suction air passing through the air 100 is increased. That is, by providing a refrigerant pipe 130 having an elliptical cross section close to the streamline, the above problems can be solved.

Furthermore, as a result of the present inventor's optimization by experiment, it is preferable that the ratio of the short axis b and the long axis a of the elliptical cross section is 1: 1.5 to 2.0.

Next, the connection pipe 140 is provided to connect the plurality of refrigerant pipes 130 to one pipe. That is, the connection pipe 140 connects two refrigerant pipes 130a and 130b adjacent to each other along the direction in which air is sucked.

The connecting pipe 140 is preferably provided in a U-shape.

The reason for this is that the refrigerant flowing along the refrigerant pipe 130 changes direction while passing through the connection pipe 140, so that the refrigerant flows naturally along the U-shaped curve.

On the other hand, the coupling of the connection pipe 140 and the refrigerant pipe 130, the coupling pipe 140 is coupled to the two adjacent refrigerant pipes (130a, 130b). In addition, all the plurality of refrigerant pipes 130 are connected to each other by fitting the other connection pipe 140 so as to be connected to one pipe. Next, the inserted and coupled refrigerant pipe 130 and the connection pipe 140 is not only infiltrated into the coupling portion between the two to secure the coupling, but also a predetermined material is dissolved to improve the corrosion resistance Soak it in the molten metal and take it out.

As a result, the effect of improving the corrosion resistance and improving the bondability can be reduced to one process, thereby reducing the number of assembly processes.

Next, the coupling between the refrigerant pipe 130 and the heat exchange fin 110 in the fin tube type heat exchanger 100 according to an embodiment of the present invention will be described in detail with reference to FIG. 4.

Figure 4 is a cross-sectional view showing a coupling state of the heat exchange fin and the refrigerant pipe according to an embodiment of the present invention.

As shown in FIG. 4, the refrigerant pipes 130 are coupled to the coupling holes 120 formed in the heat exchange fins 110 by expanding their diameters. This process is called expansion.

The refrigerant pipe 130 fitted into the coupling hole 120 formed in the heat exchange fin 110 is brought into contact with the bent portion 121 formed around the coupling hole.

In this case, the contact state between the refrigerant pipe 130 and the heat exchange fins 110 may not be closely coupled.

However, the heat transferred to the heat exchange fin 110 through the refrigerant pipe 130 is mostly made by conduction, and the amount of heat conducted between different materials is the property of the material and the coupling between the two materials. It depends on the degree. In other words, the surface roughness of the contact surface between the two materials has a large influence on the amount of heat conducted.

Therefore, in the state where the refrigerant pipe 130 and the heat exchange fins 110 are inserted into and coupled to each other, the heat transfer efficiency from the refrigerant flowing inside the refrigerant pipe 130 to the heat exchange fins 110 is reduced. have.

In order to prevent this, the fin tube-type heat exchanger 100 according to an embodiment of the present invention, by expanding the diameter of the refrigerant pipe 130 fitted into the coupling hole 120 formed in the heat exchange fin 110 to the heat exchange The contact state with the pin 110 is improved.

That is, before connecting the plurality of refrigerant pipes 130 to one pipe by the connecting pipe 140, the bullet 160 is inserted into one end of each of the refrigerant pipes 130 and pulled from the other end thereof. The bullet 160 passes through the inside of the coolant tube 130, thereby expanding the diameter of the coolant tube 130 to improve contact with the heat exchange fins 110.

Hereinafter, with reference to Figure 5 will be described the operation of the fin tube type heat exchanger according to an embodiment of the present invention.

5 is a view showing the flow of air through the fin tube type heat exchanger according to an embodiment of the present invention.

As shown in FIG. 5, the refrigerant pipe 120 is arranged along a flow direction A of air sucked into the heat exchanger 100, and two refrigerants are located at the front and back along the flow direction of the intake air. The angle formed with the line connecting the pipe 120 and the flow direction of the intake air is arranged to alternate between +30 degrees and -30 degrees. That is, the refrigerant pipes 120 are alternately arranged along the flow direction A of the air sucked into the heat exchanger 100.

As a result, the air introduced downward in FIG. 5 hits the refrigerant pipe 130 positioned in the first row, and then strikes the refrigerant pipe 130 in the second row arranged alternately with the first row. Thus, the heat exchange efficiency is increased.

In the above, specific embodiments of the present invention have been shown and described. However, the present invention can be embodied in various forms without departing from the spirit or essential characteristics thereof, and therefore, the above-described embodiments should not be limited by the contents of the detailed description, and further described above. Even if embodiments are not listed one by one in the description, they should be construed broadly within the spirit and scope defined in the appended claims. In addition, all changes and modifications included within the technical scope of the claims and their equivalents should be covered by the appended claims.

1 is a view schematically showing a state in which a fin tube type heat exchanger is installed in a refrigerator according to an embodiment of the present invention;

2 is a perspective view showing a fin tube type heat exchanger according to an embodiment of the present invention;

3 is an exploded perspective view of a fin tube type heat exchanger according to an embodiment of the present invention;

4 is a cross-sectional view showing a coupling state of a heat exchange fin and a refrigerant pipe according to an embodiment of the present invention;

5 is a view showing the flow of air through the fin tube type heat exchanger according to an embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

10: refrigerator 11: barrier

12: refrigerator compartment 13: freezer

100: fin tube heat exchanger 110: heat exchange fin

120: coupling hole 130: refrigerant pipe

140: connector 150: defrost heater

160: bullet 121: bend

Claims (8)

A plurality of heat exchange fins arranged in parallel with respect to a direction in which air is sucked; Coupling holes formed in the heat exchange fins and arranged alternately in a direction in which air is sucked; A plurality of refrigerant pipes inserted into the coupling holes and penetrating the heat exchange fins; And Includes; connecting pipes for connecting the plurality of refrigerant pipes into a single pipe, And the refrigerant pipes are coupled to the coupling holes by expanding their diameters. The method of claim 1, A fin tube-type heat exchanger, characterized in that a bent portion bent parallel to the refrigerant pipe is formed around the coupling hole. The method of claim 1, The connecting tube is a fin tube type heat exchanger, characterized in that for connecting the plurality of refrigerant pipes by welding. The method of claim 1, The coolant tube has an elliptical cross section and has a long axis parallel to a direction in which air is sucked. The method of claim 4, wherein The cross section of the coolant tube, the ratio between the short axis and the long axis of the fin tube type heat exchanger, characterized in that 1: 1.5 to 2.0. The method of claim 1, The connecting tube, the fin tube type heat exchanger, characterized in that for connecting the two refrigerant pipes adjacent to each other along the direction in which air is sucked. The method of claim 1, The connecting tube is a U-shaped fin tube heat exchanger, characterized in that provided. The method of claim 1, The coupling holes are fin tubular heat exchanger, characterized in that the imaginary line connecting two adjacent coupling holes along the direction in which air is sucked is staggered to form +30 degrees or -30 degrees with respect to the direction in which air is sucked. group.
KR1020070098925A 2007-10-01 2007-10-01 Fin-tube type heat exchanger KR20090033743A (en)

Priority Applications (1)

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KR1020070098925A KR20090033743A (en) 2007-10-01 2007-10-01 Fin-tube type heat exchanger

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Application Number Priority Date Filing Date Title
KR1020070098925A KR20090033743A (en) 2007-10-01 2007-10-01 Fin-tube type heat exchanger

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101226269B1 (en) * 2012-08-08 2013-01-25 (주)구츠 Fan coil unit with dew scatter prevention structure
CN105698562A (en) * 2016-04-19 2016-06-22 合肥太通制冷科技有限公司 Dual-convolution and single-discharging three-row-tube fin evaporator
KR20200087446A (en) 2019-01-11 2020-07-21 강석관 Cooling and heating system
CN112146328A (en) * 2019-06-27 2020-12-29 三星电子株式会社 Heat exchanger and refrigerator including the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101226269B1 (en) * 2012-08-08 2013-01-25 (주)구츠 Fan coil unit with dew scatter prevention structure
CN105698562A (en) * 2016-04-19 2016-06-22 合肥太通制冷科技有限公司 Dual-convolution and single-discharging three-row-tube fin evaporator
KR20200087446A (en) 2019-01-11 2020-07-21 강석관 Cooling and heating system
CN112146328A (en) * 2019-06-27 2020-12-29 三星电子株式会社 Heat exchanger and refrigerator including the same
WO2020262949A1 (en) * 2019-06-27 2020-12-30 Samsung Electronics Co., Ltd. Heat exchanger and refrigerator including the same
US11519676B2 (en) 2019-06-27 2022-12-06 Samsung Electronics Co., Ltd. Heat exchanger and refrigerator including the same
EP3757488B1 (en) * 2019-06-27 2023-02-22 Samsung Electronics Co., Ltd. Refrigerator including a heat exchanger

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