526322 A7 ____B7_____ 五、發明說明（I ) 【發明之詳細說明】 【發明所屬之技術領域】 本發明關於熱交換器之冷媒管，特別是一種空氣調節 機用熱交換器之冷媒管，其具有多個鰭呈螺旋狀突出於管 的內周面，當冷媒流動之同時進行熱交換。 【習知技術】 一般的空氣調節機用熱交換器，係如圖1所示，包含 冷媒管11(冷媒在其內部流動）、及多個散熱片3(以前述冷 媒管11穿過之方式來安裝），藉以讓流過前述冷媒管11之 冷媒與冷媒管11周圍的空氣之間進行熱交換。 習知之熱交換器上所使用的冷媒管11，係如圖2及圖 3所不，外徑爲7mm或9mm，並且有多個突出於其內周面 之鰭13，在前述各個鰭.13之間分別設有溝槽(groove)，利 用前述鰭13及溝槽15來增加冷媒管11內部的傳熱面積， 並且攪亂溫度境界層，以促進流過冷媒管11之冷媒與冷媒 管11周圍的空氣之間的熱交換。 也就是說，利用前述鰭13及溝槽15來增加冷媒管11 與液態或氣態冷媒接觸的面積，即使在低流速之冷媒中也 ，可經由毛細管作用及剪力而增加形成於管內的液膜之亂流 強度而提昇熱交換之效果，而依前述鰭13之個數及形狀之 不同，可改變冷媒與管壁面間之接觸面積、液膜之亂流程 度、液膜之膜厚等。 因此在製造前述冷媒管11時，爲配合前述鰭13之各 3 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 訂： •線· 526322 A7 __— _B7 五、發明說明（> ) 種用途而做出最佳的鰭13，故必須決定鰭之個數、鰭之高 度、鰭之突出角、鰭之扭轉角等加工參數。 由於前述鰭形狀之設計上仍未有一定的方法’故目前 均是經由實驗來找出最適當的組合。 也就是說，前述鰭之設計是以邊改變各個加工參數邊 進行實驗之方式，從冷媒量、冷媒種類、外在環境等熱交 換器之使用條件中找出最適當之組合。 以此方式所設計出來之習知熱交換器上’冷媒管11之 外徑爲7mm或9mm，管壁厚tl爲0.27mm，在其內周面上 形成60個突出之鰭13，該鰭13之高度H1爲0.15mm、突 出角/3 1爲56° ，扭轉角α 1爲18° 。 最近爲了要降低熱交換器的製造成本及空氣側之壓力 損失，而逐漸須將前述冷媒管Π之外徑加以縮小。 然而，在縮小前述冷媒管Π外徑的同時，若仍應用原 來形成於習知冷媒管11上鰭13之相同形狀，不僅會因前 述冷媒之壓力損失增加而降低熱交換效率，也會因鰭13不 合能加工之尺寸而有冷媒管11製造上的困難。 還有，在如上述之習知熱交換器所使用的冷媒管11中 ，設計上並未考慮到冷媒變更爲替代冷媒之場合，故變更 .前述冷媒之後會改變冷媒之壓力損失及熱傳係數，而無法 充分發揮熱交換器的性能。 因此，須開發出一種冷媒管，在縮小前述冷媒管外徑 之同時，找出前述冷媒管上之最佳的鰭之形狀及個數，藉 以降低冷媒之壓力損失，以及提高傳熱性能(如熱傳係數之 4 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) vaj- -線 526322 A7 ____________ 五、發明說明（4 ) 提局）。 _【發明欲解決之課題】 本發明爲解決上述問題點而開發出來，其目的是提供 一種冷媒管，在縮小冷媒管外徑的同時，將突出冷媒管內 周面外之鰭以適合外徑縮小後之冷媒管之方式來形成，以 降低熱交換器之成本，以及具有細徑管之優點，例如小型 化與減少空氣側之壓力損失，並且因能提高傳熱效率而發 揮最大的熱交換性能。 【課題之解決手段】 爲達成上述目的之本發明，係一種熱交換器之冷媒管 ，其結合多個散熱片，讓流過管內之冷媒及周圍空氣間進 行熱交換；其中前述冷媒管係具有5.3mm以下的外徑，並 且有多個鰭呈螺旋狀突設於內周面。 又，有關本發明之冷媒管之管壁厚在0.16mm〜0.2mm 〇 又，有關本發明之冷媒管上有40〜50個突出內周面外 之鰭，鰭之扭轉角爲6〜20° 、鰭之高度爲0.15mm〜 〇.18mm，鰭之突出角爲38〜42° 。 【發明之實施形態】 以下將根據圖面說明本發明之實施例。 圖4爲顯示有關本發明熱交換器之冷媒管構造中的局 5 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐) '" (請先閱讀背面之注意事項再填寫本頁) 續： 訂. 線- 526322 A7 _________B7 五、發明說明（厶） 部剖開示意圖，圖5爲顯示有關本發明之冷媒管的局部放 大剖面圖。 ..如圖4及圖5所示，本發明之熱交換器之冷媒管，是 以穿過多個散熱片（圖中未顯示）之方式來安裝之冷媒管， 前述冷媒管51具有5.3mm以下的外徑，內周面上形成多 個突出之鰭53，在前述各個鰭53之間分別形成溝槽55。 在此處前述冷媒管51是作成具有0.16〜0.2mm之管壁 厚t，40〜50個前述鰭53是突設在冷媒管51之內周面上 ，該鰭53具有6〜20°之扭轉角（α)，0·15〜0.18mm之高 度(Η)，38〜42°之突出角（/3)。 .前述鰭之扭轉角α是以作成6〜10°或者16〜20°者 爲佳。 在具有這種構造之本發明的熱交換器中，冷媒管51之 外徑縮小爲5.3mm相較於使用管徑7mm或9mm之冷媒管 的熱交換器，由於在相同冷媒流量下冷媒側的壓力損失增 加而且管壁厚減少，故考慮該冷媒側壓力之損失及管壁厚t 之減少下，來設計出適合外徑縮小之冷媒管的鰭53。根據 實驗之結果得知，前述冷媒管51之冷媒側壓力損失減少而 改善了熱交換性能，也讓在製造冷媒管51時可以對其鰭之 ，公差加以控制。 還有，即使在和前述冷媒管51相同之構造下將冷媒變 更爲替代冷媒時，由於其壓力損失及熱傳係數也會隨之改 變，而設計出可使用於替代冷媒之前述鰭53的形狀。 6 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 轉· 線 526322 A7 ^__ B7____ 五、發明說明（< ) 【發明之效果】 如以上說明，依據本發明所作出的熱交換器之冷媒管 上，將冷媒管之外徑加以縮小的同時，將冷媒管之鰭以適 合外徑縮小之冷媒管之方式來形成，不但能降低熱交換器 之製造成本，以及具有細徑管之優點，如小型化與減少空 氣側之壓力損失，並且能提高前述冷媒管所影響之傳熱效 率而發揮最大的熱交換性能。 特別是本發明之冷媒管中，因有以適合細徑管方式所 設計而成之鰭，故使前述鰭所影響之冷媒側壓力損失爲最 小，並且容易控制冷媒管製造時之公差。 【圖式之簡單說明】 圖1，一般熱交換器之立體圖。 圖2，習知技術之熱交換器之冷媒管構造之局部剖開 圖。 圖3，習知技術之熱交換器之冷媒管之局部放大剖面 圖。 圖4,本發明實施例之熱交換器之冷媒管構造之局部 剖開圖。 圖5，本發明實施例之熱交換器之冷媒管之局部放大 剖面圖。 【符號說明】 51 冷媒管 7 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) · --線· 526322 A7 __B7 五、發明說明（b ) 53 鰭 55 溝槽 t 冷媒管之管壁厚 Η 鰭之高度 a 鰭之扭轉角 β 鰭之突出角 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）526322 A7 ____B7_____ V. Description of the invention (I) [Detailed description of the invention] [Technical field to which the invention belongs] The present invention relates to a refrigerant pipe of a heat exchanger, particularly a refrigerant pipe of a heat exchanger for an air conditioner. Each fin protrudes in a spiral shape from the inner peripheral surface of the tube, and performs heat exchange while the refrigerant flows. [Knowledge technology] As shown in FIG. 1, a general heat exchanger for an air conditioner includes a refrigerant pipe 11 (a refrigerant flows in the inside thereof) and a plurality of fins 3 (in the manner in which the refrigerant pipe 11 passes through) To install) to allow heat exchange between the refrigerant flowing through the refrigerant pipe 11 and the air around the refrigerant pipe 11. The refrigerant pipe 11 used in the conventional heat exchanger is shown in FIG. 2 and FIG. 3, and has an outer diameter of 7 mm or 9 mm, and has a plurality of fins 13 protruding from its inner peripheral surface. Grooves are respectively provided between them. The aforementioned fins 13 and grooves 15 are used to increase the heat transfer area inside the refrigerant tube 11 and disturb the temperature boundary layer to promote the refrigerant flowing through the refrigerant tube 11 and the periphery of the refrigerant tube 11. Heat exchange between the air. That is, by using the aforementioned fins 13 and grooves 15 to increase the contact area of the refrigerant tube 11 with the liquid or gaseous refrigerant, even in low-flow-rate refrigerants, the liquid formed in the tube can be increased by capillary action and shear force. The strength of the turbulent flow of the membrane enhances the effect of heat exchange. Depending on the number and shape of the fins 13, the contact area between the refrigerant and the tube wall surface, the degree of turbulence of the liquid film, and the thickness of the liquid film can be changed. Therefore, when manufacturing the aforementioned refrigerant tube 11, in order to match each of the aforementioned 3 of the fins 13, this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (please read the precautions on the back before filling this page). : • Line · 526322 A7 __— _B7 V. Description of the invention (>) The best use of fins 13 is to determine the number of fins, the height of the fin, the protruding angle of the fin, the twist angle of the fin, etc. Processing parameters. Since there is still no certain method for the design of the aforementioned fin shape, all experiments are currently used to find the most appropriate combination. That is to say, the design of the aforementioned fin is based on experiments while changing various processing parameters, and finds the most appropriate combination from the conditions of use of the heat exchanger such as the amount of refrigerant, the type of refrigerant, and the external environment. In the conventional heat exchanger designed in this way, the outer diameter of the refrigerant tube 11 is 7 mm or 9 mm, and the tube wall thickness t1 is 0.27 mm. 60 protruding fins 13 are formed on the inner peripheral surface of the fins 13. The height H1 is 0.15 mm, the protrusion angle / 3 1 is 56 °, and the twist angle α 1 is 18 °. Recently, in order to reduce the manufacturing cost of the heat exchanger and the pressure loss on the air side, it is necessary to gradually reduce the outer diameter of the refrigerant pipe Π. However, while reducing the outer diameter of the aforementioned refrigerant tube Π, if the same shape as the fins 13 originally formed on the conventional refrigerant tube 11 is still applied, not only will the heat exchange efficiency be reduced due to the increased pressure loss of the foregoing refrigerant, but also the fins will be reduced. 13 is not compatible with the size that can be processed, and there are difficulties in manufacturing the refrigerant tube 11. In addition, in the refrigerant pipe 11 used in the conventional heat exchanger as described above, the design does not take into account the case where the refrigerant is changed to a substitute refrigerant, so it is changed. The aforementioned refrigerant will change the pressure loss and heat transfer coefficient of the refrigerant. , And can not give full play to the performance of the heat exchanger. Therefore, a refrigerant tube must be developed. While reducing the outside diameter of the refrigerant tube, find out the optimal shape and number of fins on the refrigerant tube, so as to reduce the pressure loss of the refrigerant and improve the heat transfer performance (such as 4 of the heat transfer coefficient This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) vaj--line 526322 A7 ____________ 5. Description of the invention (4 ). _ [Problems to be Solved by the Invention] The present invention was developed to solve the above-mentioned problems. The object of the present invention is to provide a refrigerant tube. While reducing the outer diameter of the refrigerant tube, it will protrude the fins outside the inner peripheral surface of the refrigerant tube to fit the outer diameter. The reduced refrigerant tube is formed to reduce the cost of the heat exchanger and has the advantages of a small diameter tube, such as miniaturization and reduction of pressure loss on the air side, and to maximize the heat exchange performance because it can improve the heat transfer efficiency. . [Solution to the problem] In order to achieve the above-mentioned object, the present invention is a refrigerant tube of a heat exchanger, which combines a plurality of fins to allow heat exchange between the refrigerant flowing through the tube and the surrounding air; It has an outer diameter of 5.3 mm or less and has a plurality of fins protruding in a spiral shape on the inner peripheral surface. In addition, the thickness of the tube wall of the refrigerant tube of the present invention is 0.16 mm to 0.2 mm. Also, the refrigerant tube of the present invention has 40 to 50 fins protruding outside the inner peripheral surface, and the twist angle of the fins is 6 to 20 °. The height of the fins is 0.15mm ~ 0.18mm, and the protruding angle of the fins is 38 ~ 42 °. [Embodiments of the invention] Embodiments of the invention will be described below with reference to the drawings. Fig. 4 shows the bureau in the construction of the refrigerant tube of the heat exchanger of the present invention. 5 The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm). '&Quot; (Please read the precautions on the back before filling (This page) Continued: Order. Line-526322 A7 _________B7 V. Sectional drawing of the description of the invention (厶). Figure 5 is a partially enlarged sectional view showing the refrigerant tube of the present invention. .. As shown in Fig. 4 and Fig. 5, the refrigerant pipe of the heat exchanger of the present invention is a refrigerant pipe installed through a plurality of radiating fins (not shown). The foregoing refrigerant pipe 51 has a diameter of 5.3 mm or less A plurality of protruding fins 53 are formed on the inner peripheral surface of the outer diameter, and grooves 55 are respectively formed between the aforementioned fins 53. Here, the aforementioned refrigerant tube 51 is formed to have a tube wall thickness t of 0.16 to 0.2 mm, and 40 to 50 of the aforementioned fins 53 are protruded on the inner peripheral surface of the refrigerant tube 51, and the fins 53 have a twist of 6 to 20 °. Angle (α), height (Η) from 0 · 15 to 0.18 mm, and protrusion angle (/ 3) from 38 to 42 °. The twist angle α of the fin is preferably 6 to 10 ° or 16 to 20 °. In the heat exchanger of the present invention having such a structure, the outer diameter of the refrigerant pipe 51 is reduced to 5.3 mm, compared to a heat exchanger using a refrigerant pipe having a pipe diameter of 7 mm or 9 mm. The pressure loss increases and the tube wall thickness decreases. Therefore, considering the loss of the refrigerant side pressure and the reduction of the tube wall thickness t, a fin 53 suitable for a refrigerant tube with a reduced outer diameter is designed. According to the results of the experiment, it is learned that the pressure loss on the refrigerant side of the refrigerant pipe 51 is reduced and the heat exchange performance is improved, and the fins and tolerances of the refrigerant pipe 51 can be controlled when the refrigerant pipe 51 is manufactured. In addition, even when the refrigerant is changed to a substitute refrigerant under the same structure as the refrigerant tube 51, the pressure loss and the heat transfer coefficient of the refrigerant are changed accordingly. Therefore, the shape of the fin 53 that can be used to replace the refrigerant is designed. . 6 This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) Go to line 526322 A7 ^ __ B7____ 5. Description of the invention (<) 【 Effects of the Invention As described above, the refrigerant tube of the heat exchanger made according to the present invention reduces the outside diameter of the refrigerant tube and forms the fins of the refrigerant tube in a manner suitable for the refrigerant tube with a reduced outside diameter. Not only can reduce the manufacturing cost of the heat exchanger, but also have the advantages of small diameter tubes, such as miniaturization and reduction of pressure loss on the air side, and can improve the heat transfer efficiency affected by the aforementioned refrigerant tube to exert the maximum heat exchange performance. In particular, the refrigerant tube of the present invention has fins designed in a manner suitable for a narrow-diameter tube method, so that the pressure loss on the refrigerant side affected by the fins is minimized, and tolerances during the manufacture of the refrigerant tube are easily controlled. [Brief description of the drawings] Fig. 1 is a perspective view of a general heat exchanger. Fig. 2 is a partially cutaway view of a refrigerant pipe structure of a heat exchanger of the conventional technology. Fig. 3 is a partially enlarged sectional view of a refrigerant pipe of a conventional heat exchanger. Fig. 4 is a partial sectional view of a refrigerant pipe structure of a heat exchanger according to an embodiment of the present invention. Fig. 5 is a partially enlarged sectional view of a refrigerant pipe of a heat exchanger according to an embodiment of the present invention. [Symbol description] 51 Refrigerant tube 7 This paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling out this page) ·-line · 526322 A7 __B7 V. Description of the invention (b) 53 fin 55 groove t tube wall thickness of the refrigerant tube 高度 height of the fin a twist angle of the fin β protrusion angle of the fin (please read the precautions on the back before filling this page) This paper size is applicable to China Standard (CNS) A4 specification (210 X 297 mm)