Heat exchanger

专利摘要:
PURPOSE: A capillary heat exchanger is provided to improve the heat transfer efficiency by a refrigerant tube and to obtain the maximum heat-exchanging performance by forming composite structure of the refrigerant tube using a capillary tube and a groove tube. CONSTITUTION: A capillary heat exchanger consists of refrigerant tubes(51) flowing refrigerant therethrough, and plural cooling fins having a heat-exchanging area between refrigerant and air. The refrigerant tube has composite structure of a capillary tube having a pipe diameter of lower than 5mm and a groove tube having plural fins(53) protruded spirally. The refrigerant tube has pipe thickness(t) of 0.16-0.2mm. Each fin is formed inside the refrigerant tube with a spiral angle(alpha) of 6-10 degrees, height(Hf) of 0.15-0.18mm and a fin angle(beta) of 38-42 degrees. The capillary heat exchanger obtains good points including low cost, small size and minimum pressure loss of air through adoption of composition refrigerant tube structure including a capillary tube and a groove tube.
公开号:KR20020004526A
申请号:KR1020000038501
申请日:2000-07-06
公开日:2002-01-16
发明作者:오세기；장동연；오세윤；이욱용
申请人:구자홍；엘지전자주식회사；
IPC主号:

专利说明:

Fine Tube Heat Exchanger {HEAT EXCHANGER}
[11] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a narrow tubular heat exchanger, and more particularly, to a narrow tubular heat exchanger including a refrigerant pipe having a complex structure in which a plurality of fins spirally protrude from the narrow tube and the inner circumferential surface thereof.
[12] 1 is a block diagram illustrating a structure of a general heat exchanger. Referring to the heat exchanger, the heat exchanger is coupled to a refrigerant pipe 1 through which a refrigerant flows and an expansion pipe connected to the refrigerant tube 1 to between the refrigerant and air. It is composed of a plurality of cooling fins (3) to secure the heat exchange area of the heat exchanger between the refrigerant flowing through the refrigerant pipe (1) and the surrounding air.
[13] Here, the assembly of the refrigerant pipe (1) and the cooling fin (3) is generally used as one heat exchanger in which two are assembled in two rows form as shown in FIG.
[14] In particular, the refrigerant pipe 1 used in the conventional heat exchanger is a groove pipe having a tube diameter of 7 mm or 9 mm and formed with a plurality of fins on the inner circumferential surface thereof.
[15] At this time, the use of the grooved pipe in the coolant pipe 1 as described above, the heat transfer area inside the coolant pipe 1 is increased by the fin at the same time the temperature boundary layer is disturbed to improve the heat transfer performance between the coolant pipe 1 and the air. Because it is improved.
[16] Specifically, in the case of evaporative heat transfer, the contact area between the liquid refrigerant and the tube wall surface is increased by the fin, and a liquid film is formed in the tube through the capillary effect and the shear force even at a low refrigerant flow rate, and the strength of the turbulence is also increased.
[17] In addition, in the case of condensation heat transfer, the contact area between the vapor phase refrigerant and the pipe wall surface, the degree of turbulence of the liquid film, the liquid film thickness, the drain of the condensate liquid, etc. are different depending on the shape of the fin.
[18] Therefore, when manufacturing a heat exchanger using a grooved tube in the refrigerant pipe (1) for evaporation or condensation, the number of fins, height, fin angle, spiral angle, etc. so that the shape of the fin is optimized for each use. The same machining parameters should be selected.
[19] At this time, the method of designing the shape of the pin does not yet have a standardized design method and is made by a method of finding an optimal combination through experiments.
[20] In other words, the fin is designed in such a way as to find an optimal combination in the use conditions of the heat exchanger such as the amount of refrigerant, the type of the refrigerant, the external environment, etc., by experimenting with changing each processing variable.
[21] The refrigerant pipe 1 used in the conventional heat exchanger designed in the above manner is formed to have a tube diameter of 7 mm or 9 mm and a tube thickness of 0.27 mm, and has a height of 0.15 mm, a fin angle of 56 degrees, and an inner circumferential surface thereof. There are 60 pins formed to have a spiral angle in degrees.
[22] By the way, the conventional heat exchanger using the refrigerant pipe 1 having a diameter of 7 mm or 9 mm as described above, has been recently emerging to obtain various advantages such as price reduction and air pressure loss reduction ( It is necessary to reduce the diameter of the refrigerant pipe 1 because it is not suitable for the trend of narrow diameter of 1).
[23] However, if the diameter of the refrigerant tube 1 is reduced to a narrow diameter tube and the shape of the fin formed in the conventional refrigerant tube 1 is applied to the inner circumferential surface of the tube as it is, the pressure of the refrigerant tube 1 is rather increased. Not only is the loss increased, but there is a problem that it is beyond the processable dimensions.
[24] In addition, since the refrigerant pipe 1 used in the conventional heat exchanger is designed without considering the case of changing the refrigerant into an alternative refrigerant, changing the refrigerant may change the pressure loss and the heat transfer coefficient of the refrigerant to exert its performance. There was a problem that became impossible.
[25] Therefore, the shape of the fin formed in the refrigerant pipe 1 is optimized according to the diameter and the type of the refrigerant, so that the heat transfer performance such as the pressure loss and the heat transfer coefficient of the refrigerant pipe 1 is used while the fine pipe is used for the refrigerant pipe 1. There is a need to develop a refrigerant tube that can be maintained as is.
[26] The present invention has been made to solve the above problems, while forming the refrigerant pipe in the form of a combination of the fine pipe and the groove pipe while taking advantage of all the advantages of the fine pipe such as price reduction, miniaturization, air pressure loss reduction An object of the present invention is to provide a tubular heat exchanger for improving heat transfer efficiency by the refrigerant pipe to maximize heat exchange performance.
[1] 1 is a configuration diagram showing a structure of a general heat exchanger,
[2] 2 is a block diagram showing a refrigerant pipe structure of a narrow tubular heat exchanger according to the present invention;
[3] 3 is a cross-sectional view of a refrigerant pipe according to the present invention.
[4] <Explanation of symbols for the main parts of the drawings>
[5] 51 refrigerant tube 53 fin
[6] 55 groove
[7] t: pipe thickness of refrigerant pipe
[8] Hf: height of the pin
[9] α: Spiral angle of the pin
[10] β: pin angle of the pin
[27] According to an aspect of the present invention, there is provided a narrow tubular heat exchanger including a refrigerant pipe through which a refrigerant flows and a plurality of cooling fins coupled to the refrigerant pipe to secure a heat exchange area between the refrigerant and air. The refrigerant pipe is characterized in that the thin tube and the groove tube formed with a plurality of fins spirally projected on the inner circumferential surface having a tube diameter of 5 mm or less.
[28] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[29] Figure 2 is a block diagram showing the structure of the refrigerant pipe of the tubular heat exchanger according to the present invention, Figure 3 is a cross-sectional view of the refrigerant pipe according to the present invention.
[30] 2 and 3, the narrow tubular heat exchanger according to the present invention is coupled to the refrigerant pipe 51 through which the refrigerant flows, and the heat exchange area between the refrigerant and the air by expanding the refrigerant pipe 51; It is composed of a plurality of cooling fins (not shown) to secure the, the refrigerant pipe 51 is a three-inch tube having a tube diameter of 5 mm or less and a groove tube formed with a plurality of fins 53 protruding spirally on the inner circumferential surface In the form of
[31] Here, the coolant pipe 51 is formed to have a pipe thickness (t) of 0.16 to 0.2mm, each fin 53 is formed on the inner circumferential surface of the coolant pipe 51, at the same time the spiral angle ( α) is formed to be 6 to 10 degrees, its height Hf is 0.15 to 0.18 mm, and its pin angle β is 38 to 42 degrees.
[32] In addition, according to another embodiment, the coolant pipes 51 are formed to have a pipe thickness t of 0.16 to 0.2 mm, and each of the fins 53 is formed on the inner circumferential surface of the coolant pipe 51. At the same time, the spiral angle α is 16 to 20 degrees, the height Hf is 0.15 to 0.18 mm, and the pin angle β is 38 to 42 degrees.
[33] In the heat exchanger according to the present invention as described above, the diameter of the refrigerant tube 51 is reduced to 5 mm, and the pressure loss at the refrigerant side at the same refrigerant flow rate is increased compared to the heat exchanger using the refrigerant tube having a diameter of 7 mm or 9 mm. At the same time, since the tube thickness t is reduced, the shape of the fin 53 is designed in consideration of the refrigerant pressure loss and the decrease in the tube thickness t.
[34] That is, the processing variables of the fins 53 are selected to reduce the pressure loss on the refrigerant side of the refrigerant pipe 51 and to manage the tolerances during the manufacture of the refrigerant pipe 51.
[35] In addition, since the pressure loss and heat transfer coefficient change even when the refrigerant is changed to the alternative refrigerant in the same structure of the refrigerant pipe 51, the shape of the fin 53 is designed in consideration of the use of the alternative refrigerant. .
[36] In the above, unexplained reference numeral 55 denotes a groove formed between each pin 53.
[37] The tubular heat exchanger according to the present invention constructed and operated as described above takes advantage of all the advantages of the tubular tube such as cost reduction, miniaturization, and air pressure loss reduction by forming the refrigerant tube in a combination of the tubular tube and the groove tube. While improving the heat transfer efficiency by the refrigerant pipe has the advantage that the heat exchange performance is maximized.
[38] In particular, the present invention has the advantage that the tolerance of the refrigerant pipe can be easily managed by minimizing the refrigerant pressure loss due to the fin by designing the shape of the fin in a shape suitable for the narrow pipe in consideration of the thin pipe.
[39] In addition, the capillary heat exchanger according to the present invention has an advantage in that it is possible to respond to this change even if the refrigerant is replaced with the alternative refrigerant by selecting each processing variable of the fin in consideration of the use of the alternative refrigerant.

权利要求:
Claims (3)
[1" claim-type="Currently amended] In a heat exchanger consisting of a refrigerant pipe through which a refrigerant flows and a plurality of cooling fins coupled to the refrigerant pipe to secure a heat exchange area between the refrigerant and air,
The refrigerant pipe is a narrow-tube heat exchanger, characterized in that the composite pipe having a tube diameter of 5 mm or less and a groove tube formed with a plurality of fins protruding spirally on the inner peripheral surface.
[2" claim-type="Currently amended] The method of claim 1,
The refrigerant pipe is formed to have a tube thickness of 0.16 to 0.2 mm,
Each of the fins is formed on the inner circumferential surface of the refrigerant pipe at the same time, the height is 0.15 to 0.18mm, the fin angle is 38 to 42 degrees, the spiral angle is 6 to 10 degrees, characterized in that the tubular heat exchanger .
[3" claim-type="Currently amended] The method of claim 1,
The refrigerant pipe is formed to have a tube thickness of 0.16 to 0.2 mm,
Each of the fins is formed on the inner peripheral surface of the refrigerant pipe 40 to 50 at the same time the height is 0.15 to 0.18mm, the fin angle is 38 to 42 degrees, the spiral angle is characterized in that formed 16 to 20 degrees .

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同族专利:

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JP3110197U|2005-06-16|

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ITRM20010384D0|2001-07-03|

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JP2002062077A|2002-02-28|

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US20020011332A1|2002-01-31|

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CN1332356A|2002-01-23|

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TW526322B|2003-04-01|

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ITRM20010384A1|2002-01-07|

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KR100382341B1|2003-05-01|

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ES2228189A1|2005-04-01|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2000-07-06|Application filed by 구자홍, 엘지전자주식회사

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2000-07-06|Priority to KR20000038501A

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2002-01-16|Publication of KR20020004526A

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2003-05-01|Application granted

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2003-05-01|Publication of KR100382341B1

优先权:

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申请号 | 申请日 | 专利标题

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KR20000038501A|KR100382341B1|2000-07-06|2000-07-06|Heat exchanger|