• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Provided is a suction pipe assembly with improved heat conductivity and a manufacturing method thereof. The suction pipe assembly includes a suction pipe, a capillary, a heat transmission pipe, and an adhesive agent. The suction pipe is disposed between a compressor and an evaporator and guides a refrigerant ejected from the evaporator to the compressor in a cooling system executing cooling by circulating the refrigerant and including the compressor, the condenser and the evaporator. The capillary is disposed between the condenser and the evaporator and guides the refrigerant ejected from the condenser to the evaporator. The heat transmission pipe includes the capillary inside and a contact portion for widening a contact area to the suction pipe outside to tightly contact the suction pipe. The adhesive agent is interposed between an external surface of the suction pipe and the contact portion to connect the heat transmission pipe with the suction pipe.
    公开号:SE536230C2
    申请号:SE0950301
    申请日:2008-07-16
    公开日:2013-07-09
    发明作者:Byung Hee Ryoo
    申请人:Korea Bundy Co Ltd；
    IPC主号:
    专利说明:

    536 230 Referring to Figs. 1 and 2, the conventional suction pipe assembly includes a suction pipe 310 and a capillary pipe 320 whose outer side surfaces are in contact with each other in the longitudinal direction.
    The suction tube 310 and the capillary tube 320 may be joined at a portion 330 by a technique such as welding.
    Welding, brazing or soldering can be used to join the suction tube 310 and the capillary tube 320. The soldering is usually performed using tin (Sn).
    In addition, to improve the heat exchange between the suction tube 310 and the capillary tube 320 and the corrosion resistance, the suction tube 310 and the capillary tube 320 are usually made of copper.
    DESCRIPTION OF THE INVENTION TECHNICAL PROBLEM However, the conventional straw device has the following shortcomings.
    First of all, the suction tube and the capillary tube contact each other only with one line, since the outer surface of the suction tube and the capillary tube is of a cylindrical shape. Consequently, the heat transfer area is reduced and thus heat can not be transferred efficiently.
    Second, since the connector between the suction tube and the capillary tube is long, it is difficult to evenly and accurately weld the connector. This degrades work efficiency and even welding quality can hardly be ensured.
    Third, since the suction tube, which has a larger diameter relative to the capillary tube, is made of copper, manufacturing costs increase, which also leads to an increase in equipment utilizing the suction tube.
    TECHNICAL SOLUTION An embodiment of the present invention which is intended to solve the above problems discloses the provision of a suction pipe device with improved friendliness and a method for manufacturing the same. Other objects and advantages of the present invention may be understood from the following description, and are apparent from the embodiments of the present invention. Furthermore, it is obvious to a person skilled in the art in the field to which the present invention relates that the objects and objects of the present invention can be achieved by the device according to the claims and combinations thereof.
    According to one aspect of the present invention there is provided a suction device comprising: a suction arranged between a compressor and an evaporator for conducting a refrigerant expelled from the evaporator to a compressor in a cooling system comprising the compressor, condenser and evaporator and which performs cooling by circulation of the coolant; a capillary tube arranged between the condenser and the evaporator for conducting the coolant expelled from the condenser to the evaporator; a heat transfer tube including on the inside the capillary tube and including a contact piece for extending a contact area towards the outside of the suction tube, the friend transfer tube tightly contacting an outer circumferential surface of the suction tube; and an adhesive means disposed between an outer surface of the suction tube and the connector for connecting the heat transfer tube to the suction tube.
    The connector may be formed on the outer circumferential surface of the suction tube, and a width of the connector not less than an outer diameter of the heat transfer tube.
    The connector may further include protrusions at both ends in a longitudinal direction of the connector and the protrusions may be received in connecting grooves formed in the suction tube in accordance with the protrusions.
    The straw can be made of steel or aluminum.
    The suction pipe can be made of steel and plated with a corrosion-resistant material, and the corrosion-resistant plating can be at least some selected from the group hot-dip galvanizing, molten zinc-trivalent chrome-plating, SeAH-Lume plating and SeAHLume-trivalent chrome-plating.
    The heat transfer tube is made of aluminum.
    The adhesive may be a thermally conductive material including a hardener and a filler, and the filler may include any selected from the group consisting of copper powder, aluminum powder, carbon black and ceramics.
    According to another aspect of the present invention there is provided a method of manufacturing a suction pipe device, which method comprises manufacturing a heat transfer tube having an inner diameter corresponding to an outer diameter of a capillary tube by using a drawing method, cutting the heat transfer tube into a certain length, insertion of the capillary tube into the heat transfer tube, forming a contact piece on the heat transfer tube with the capillary tube inserted therein, coating the contact piece with an adhesive, and connecting the heat transfer tube to the suction tube by applying the adhesive to the adhesive coated thereon. outer circumferential surface of the suction tube.
    ADVANTAGEOUS EFFECTS The suction device and a manufacturing process therefor according to the present invention have the following effects.
    First, since one side of the heat transfer tube is formed as a contact piece having a shape corresponding to the outer circumferential surface of the suction tube, the heat transfer tube is in close contact with the suction tube so that the contact area against the suction tube thereby increases. Due to the increased contact area, more efficient heat transfer can be achieved between a coolant which transfers to the inside of the suction tube and a coolant which transfers to the inside of the capillary tube which is inserted into the heat transfer tube.
    Second, since the capillary tube is tightly inserted into the heat transfer tube, the same effect can be achieved as an increase in the outer circumferential surface of the capillary tube. Thus, the friend transfer efficiency through the capillary tube can be improved.
    Third, the heat transfer tube and the suction tube are connected to each other by an adhesive which is a heat conducting material. This makes it possible to prevent the thermal conductivity between the suction pipe and the heat transfer pipe from being degraded.
    Fourth, since the straw can be made not only of copper or aluminum but also steel, which is relatively inexpensive, the straw device is economical to manufacture. Even if the suction pipe is made of steel, the outer surface of the suction pipe can be plated with a corrosion-resistant material. Thereby it is possible to achieve a corrosion resistance duly suitable for commercial use.
    Fifth, both ends of the connector may further comprise a respective protrusion, and the outer circumferential surface of the suction tube may include a connecting groove corresponding to the protrusion. The protrusions are inserted into and fixed firmly in the respective connecting grooves. Therefore, the heat transfer tube can be more easily connected to the suction tube, thereby improving work efficiency. In addition, the distance between the connector and the suction tube can be maintained even, the thickness of the adhesive applied thereon can be kept even. Thereby, the adhesion capacity and the heat conduction can be controlled. Although the present invention has been described with respect to the specific embodiments, it will be apparent to one skilled in the art that various kinds of changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
    BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a perspective view showing a conventional suction device.
    Figure 2 is a cross-sectional view illustrating the suction pipe assembly of Figure 1 cut along line A-A.
    Figure 3 is a perspective view describing a suction device in accordance with Example 1 of the present invention.
    Figure 4 is a cross-sectional view illustrating the straw device according to Example 1.
    Figure 5 shows as an example a heat transfer capacity of the suction pipe device according to example 1.
    Figure 6 is a table showing results regarding heat transfer capacity of a suction pipe device according to Example 1.
    Figure 7 is a flow chart describing a process for manufacturing the straw device according to Example 1. Figure 8 is a cross-sectional view illustrating a straw device according to Example 2 of the present invention.
    Figure 9 is a cross-sectional view illustrating a suction device according to Example 3 of the present invention.
    BEST MODE FOR CARRYING OUT THE INVENTION The advantages, features and aspects of the invention will become apparent from the following description of the embodiments taken in conjunction with the accompanying figures.
    Figure 3 is a perspective view describing a suction device according to Example 1 of the present invention. Figure 4 is a cross-sectional view illustrating the suction device of Example 1.
    As shown in Figures 3 and 4, the suction tube device includes a suction tube 10, a capillary tube 20, a heat transfer tube 30, and an adhesive 50. In this case, the capillary tube 20 is inserted to a certain length inside the heat transfer tube 30.
    On the outside of the heat transfer tube 30, a contact piece 40 is formed in a shape corresponding to the outer circumferential surface of the suction tube 10. Since the contact piece 40 is tightly connected to an outer circumferential surface of the suction tube 10, the heat transfer tube 30 is combined with the suction tube 10. the heat transfer tube 30 and the capillary tube 20 are in contact with each other due to the connection, not only can heat transfer but also the heat conduction is improved by expanding the contact area between the heat transfer tube 30 and the suction tube 10 depending on the presence of the connector 40. At the same time, the adhesive 50 for providing adhesion between the heat transfer tube 30 and the suction tube 10 may be arranged between the contact piece 40 and the outer surface of the suction tube 10. The adhesive 50 may be of heat-conducting material. Thus, the adhesive 50 not only provides adhesion between the heat transfer tube 30 and the suction tube 10 but also minimizes a decrease in a heat transfer efficiency caused by the transfer of the coolant to the suction tube 10 and the transfer of the coolant to the capillary tube 20. More specifically, the suction may include the suction tube 10, the capillary tube 20, the heat transfer tube 30, and the adhesive 50.
    In this case, the capillary tube 20 can be a typical capillary tube which is mounted between a condenser and an evaporator and controls the transfer of coolant expelled from the condenser to penetrate into the evaporator.
    The capillary tube 20 may be made of copper, but the present invention is not limited to the design of the capillary tube 20 of copper and it may be formed of various materials such as aluminum (Al) and steel.
    The capillary tube 20 can be inserted inside the heat transfer tube 30.
    To receive the capillary tube 20, the heat transfer tube 30 may be shaped like a tube, and the heat transfer tube 30 may have an inner diameter corresponding to the outer diameter of the capillary tube 20. Accordingly, the capillary tube 20 can tightly contact the heat transfer tube 30 to integrate with the heat transfer tube 30. Consequently, an effect is achieved that the outer surface of the capillary tube 20 expands and thus the heat is transferred more efficiently through the capillary tube 20.
    The connector 40 may be integral with the outer surface of the heat transfer tube 30.
    The contact piece 40 is formed in a longitudinal direction of the heat transfer tube 30, and a contact surface 45 of a shape corresponding to the outer circumferential surface of the suction tube 10 may be designed to have a definite width (VV).
    In this case, the width (W) of the contact piece 40 formed by the contact surface 45 can be formed wider than an outer diameter (W ') of the heat transfer tube 30 to expand the contact area by surface contact with the outer circumferential surface of the suction tube 10.
    Therefore, heat transfer between the suction tube 10 and the heat transfer tube 30 is in a wide range. As a result, the heat conduction through the heat transfer tube 30 is improved.
    At the same time, the contact surface 45 may be coated with the adhesive 50. The adhesive 50 on the contact surface 45 is brought to the suction tube 10 and adheres thereto. As a result, the heat transfer tube 30 is connected to the suction tube 10. In this case, the adhesive 50 may be a heat conductive material so as not to impede the heat transfer ability between the heat transfer tube 30 and the suction tube 10.
    In order not to adversely affect the heat transfer, the adhesive 50 may be a hardener and a filler. To ensure heat conduction, the filler can be selected from the group comprising copper powder, aluminum powder, carbon black and ceramic.
    The adhesive 50 may be a typical adhesive used to attach an object to something without regard to a hardener or filler.
    The adhesive 50 disposed between the suction tube 10 and the contact surface 45 provides sufficient adhesion for the heat transfer tube 30 to stably adhere to the suction tube 10. The adhesive 50 is applied in a thickness (H) which minimizes its obstruction of the heat transfer which may be caused by it. adhesive 50.
    In this case, the thickness of the adhesive 50 which can provide a sufficient adhesion so that the heat transfer tube 30 adheres stably to the suction tube 10 and minimizes the heat transfer obstruction can be in the range from about 0.005 mm to about 0.015 mm.
    At the same time, the contact piece 40 can be formed with a thickness (H ') which facilitates the heat transfer through the contact piece 40 while heat loss of the capillary tube 20 and the suction tube 10 is minimized. The thickness of the connector 40 (H ') can range from about 0.04 mm to about 0.07 mm.
    The heat transfer tube 30 may be formed of aluminum, but the present invention is not limited thereto, and various materials may be used to design the heat transfer tube 30.
    At the same time, the suction pipe 10 is arranged between a compressor and an evaporator in a cooling system which performs cooling by circulating a coolant and includes a compressor (not shown), a condenser (not shown) and an evaporator (not shown). The suction pipe 10 may be a typical suction pipe for directing the coolant expelled from the evaporator to the compressor. The suction tube 10 may be formed of at least one selected from steel, aluminum, or plated with a corrosion resistant material.
    When the suction tube 10 is formed of steel, the machining and curving properties of the suction tube 10 are improved. Thus, work efficiency can be improved through simple machining. As steel is cheaper than aluminum or copper, the economic efficiency of manufacturing is also improved. Although the suction pipe 10 is made of steel, there is no risk of corrosion as the steel suction pipe 10 is plated with a corrosion-resistant material.
    The corrosion-resistant plating can be at least some selected from hot dip galvanizing, molten zinc-trivalent chrome plating, SeAHLume plating, and SeAHLume-trivalent chrome plating.
    Molten zinc-trivalent chromium plating is a plating method where an object is plated with molten zinc and then chromium-plated with trivalent chromium (Cry).
    SeAHLume plating is performed with approximately 55 weight percent aluminum, approximately 43.4 to approximately 44.9 weight percent zinc, and some unavoidable contaminants.
    SeAHLume-trivalent chrome plating is a method where an object is plated with SeAHLume and then chrome-plated with trivalent chrome (Cry).
    Figure 5 shows as an example a heat transfer capacity of the straw device according to Example 1, and Figure 6 is a table showing a result regarding heat transfer capacity of a straw device according to Example 1.
    As shown in Figures 5 and 6, a heat source is applied to the inside of the suction tube 10 which, by connection, contacts the heat transfer tube 30 through the adhesive 50. Here, an adiabatic material 60 is provided on the outside of the suction tube 10 and the heat transfer tube 30 to prevent as much as possible the added heat is given off to the atmosphere.
    Thereafter, the temperature was measured with a thermometer 25 arranged in the upper part of the capillary tube 20 furthest from the suction tube 10, and the measured temperature was compared with the temperature of the heat source applied to the suction tube 10.
    Experimental conditions for the heat transfer capacity of the suction pipe device were as follows. First, the suction tube 10 used in Examples 1 and 2 was formed of steel having an outer diameter of about 6.35 mm, a thickness of about 0.5 mm, and a length of about 1.34 mm. .
    The capillary tube 20 was formed of copper having an outer diameter of about 1.8 mm, a thickness of about 0.625 mm, and a length of about 2.700 mm.
    The heat transfer tube 30 was formed of aluminum.
    A test chamber (not shown) in which the suction device and the adiabatic material 60 were arranged was maintained at an internal temperature of about 30 ° C with a humidity of about 60%.
    Furthermore, an antifreeze at about 62.2 ° C was used as the heat source applied to the inside of the suction tube 10.
    At the same time, in Comparative Examples 1 and 2, the same adiabatic materials were used as in Examples 1 and 2 above, and the heat source was applied at the same temperature. Furthermore, the suction tube and the capillary tube had the same diameter, thickness and length as the suction tube 10 and the capillary tube 20, but they were all made of copper. The suction tube and the capillary tube were connected to each other by soldering with tin (Sn) in the suction tube device, and the temperature was measured in the upper part of the capillary tube.
    An average temperature of the temperatures measured in Comparative Examples 1 and 2 was defined as 100%, which is a reference value.
    Then, an average temperature of the temperatures measured in Examples 1 and 2 was presented as a percentage (%) of the reference value.
    When the measured temperatures in the examples are above the reference value, it means that the suction pipe device is commercially acceptable.
    The experimental result was as follows. The measured temperature in Comparative Example 1 was 60.19 ° C, and the measured temperature in Comparative Example 2 was 60.15 ° C. The average temperature in Comparative Examples 1 and 2 was 60.17 ° C.
    The measured temperature in Example 1 was 60.88 ° C, and the measured temperature in Example 2 was 60.92 ° C. The average temperature in Examples 1 and 2 was 60.90 ° C. 10 15 20 25 30 536 230 11 Therefore, when the average temperature of 60.17 ° C in the comparative examples was set to 100%, it appears that the average temperature in the examples increased 1.2%. According to the experiment, the width of the solder used in the comparative examples was between about 1.4 mm and 1.6 mm. When the width of the charge was approximately 1.5 mm, the heat transfer area formed in the 1.314 mm long suction tube was 1.971 mm 2. The width (VV) of the connector used in the examples was between approximately 3.3 mm to approximately 3.7 mm. When the width of the contact piece was approximately 3.5 mm, the heat transfer area formed in the 1.314 mm long suction tube was 4,599 mm 2. The experimental results show that the heat transfer area in the examples increased approximately 2.3 times compared with the comparative examples.
    Overall, since the width (W) of the connector 40 used in the examples was wider than the width of the solder used in the comparative examples, the heat transfer area of the suction tube 10 increases, leading to an improvement in the heat transfer efficiency.
    It is concluded that the heat transfer tube 30 is considered commercially acceptable due to the improved heat transfer efficiency.
    Figure 7 is a flow chart describing a process for manufacturing the suction pipe device of Example 1.
    Referring to Figure 1, in step S110, a heat transfer tube having an inner diameter corresponding to the outer diameter of a capillary tube is made by a drawing technique so that the capillary tube can be inserted into the inside of the heat transfer tube.
    In step S120, the heat transfer tube is cut to a specified length in accordance with the length of the capillary tube to tightly contact the suction tube. In step S130, the capillary tube is inserted into the inside of the cut heat transfer tube. In step S140, a contact piece is formed on the outer surface of the heat transfer tube with the capillary tube inserted therein.
    The contact piece can be formed by a forming process such as roll forming. However, the present invention is not limited to the forming process, and other diverse and suitable machining methods may be applied to form the connector. In step S150, the connector is coated with an adhesive. In step S160, the connector coated with the adhesive adheres to the outer circumferential surface of the suction tube to thereby connect the heat transfer tube to the suction tube. Through the process, the straw device of Example 1 was manufactured.
    At the same time, the suction tube can be connected to the heat transfer tube by applying the adhesive to the outer circumferential surface of the suction tube and applying the connector to the adhesive. Otherwise, they can also be connected to each other by coating both the outer circumferential surface of the suction tube and the connector and assembling them. In step S170, the suction pipe device manufactured as above can be curved expediently to correspond to the shape of a place and a space where the suction pipe device is applied.
    DESCRIPTION OF EMBODIMENTS Figure 8 is a cross-sectional view illustrating a suction device in accordance with Example 2 of the present invention. The suction pipe assembly of Example 2 includes protrusions formed at both ends of the connector and connecting grooves formed on the outer circumferential surface of the suction pipe to conform to the protrusions. Since the other ingredients are the same as those in Example 1, a detailed description of the common ingredients is omitted.
    Referring to Figure 8, protrusions 147 are formed on both ends of the contact piece 140 mounted on a heat transfer tube 130 with a capillary tube 20 mounted therein.
    In this case, the projections 147 are formed in the longitudinal direction of the contact piece 140.
    The suction tube 110 includes connecting grooves 115 formed in accordance with the projections 147 which receive the projections 147.
    The connecting grooves 115 and the projections 147 facilitate the adhesion work by preventing the heat transfer tube 130 from moving when the heat transfer tube 130 adheres to the suction tube 110. They also cause the suction tube 110 and the heat transfer tube 130 to adhere to each other in a fine manner. form.
    The protrusions 147 also bond the adhesive 50 between a contact surface 145 and the suction tube 110 so that the adhesive 50 is not pushed out of the contact piece 140. Thereby, the connecting grooves 115 and the protrusions 147 prevent loss of the adhesive 50.
    The protrusions 147 and the connecting grooves 115 can be formed so that the space between the contact surface 145 and the suction tube 110 varies from about 0.005 mm to about 0.015 mm when the protrusions 147 engage the connecting grooves 115.
    Then, the adhesive 50 applied between the contact surface 145 and the suction tube 110 can be automatically maintained at a uniform thickness with a height of about 0.005 mm to about 0.015 mm.
    Figure 9 is a cross-sectional view illustrating a suction device in accordance with Example 3 of the present invention. The suction pipe assembly of Example 3 includes grooves 212 on the outer circumferential surface of the suction pipe. The other constituents are the same as those in Example 1.
    Referring to Figure 9, more than one groove 212 may be formed on a piece of the outer surface of the suction tube 210.
    In this case, the groove 212 can be formed on a piece where the contact surface 45 formed on the heat transfer tube 30 adheres by means of the adhesive 50.
    The area where the grooves 212 are formed on the outer circumferential surface of the suction tube 210 may correspond to the area of the contact surface 45.
    The grooves 212 may be formed on the outer surface of the suction tube 210 to have a definite width and height. They may be formed in the longitudinal direction of the suction tube 210, or they may be formed in a circumferential direction of the suction tube 210.
    The grooves 212 may also be formed in mesh form but are not limited to a specific shape or pattern.
    The grooves 212 may be formed by a physical or chemical process. For example, they may be physically formed on the surface of the suction tube 210 by a forming process such as roll forming, or they may be chemically formed by an etching process. The grooves 212 can prevent the adhesive 50 from running down the outer surface of the suction tube 210 by allowing the adhesive 50 to penetrate the grooves 212. By this process, the coating of the adhesive 50 can be performed balanced and coated condition can be maintained fine.
    The adhesive 50 applied between the suction tube 210 and the contact surface 45 further penetrates into the grooves 212 so that the adhesion increases between the adhesive 50 and the suction tube 210.
    权利要求:
    Claims (4)
    [1]
    A suction device comprising a suction pipe (10; 110; 210) disposed between a compressor and an evaporator for directing a refrigerant expelled from the evaporator to a compressor in a cooling system including the compressor, condenser and evaporator and performing cooling by circulating the refrigerant; a capillary tube (20) disposed between the condenser and the evaporator to direct the refrigerant expelled from the condenser to the evaporator; and, a heat transfer tube (30; 130) including the capillary tube (20) on the inside and including a contact piece (40; 140) in surface contact with the outside of the suction tube (10; 110; 210) for extending a contact area to the suction tube (10; 110; 210) ) outside, where the heat transfer tube (30; 130) tightly contacts an outer circumferential surface of the suction tube (10; 110; 210), the outer circumferential surface of the suction tube (10; 110; 210) and the contact piece (40; 140) being connected to each other by any of the welding, soldering, brazing or an adhesive (50); wherein the contact piece (40; 140) is formed on the outer circumferential surface of the suction tube (10; 110; 210), and wherein a width (W) of the contact piece (40; 140) is not less than an outer diameter (W ') of the heat transfer tube (30). ; 130); characterized in that the contact piece (140) further comprises projections (147) at both ends in a longitudinal direction of the contact piece (140) and that the projections (147) are received in connecting grooves (115) formed in the suction pipe (110) in accordance with the projections (147) . Suction pipe device according to claim 1, characterized in that the suction pipe (10; 110; 210) is made of something made of steel and aluminum.
    [2]
    2.. The suction pipe device according to claim 2, characterized in that the suction pipe (10; 110; 210) is made of steel and plated with a corrosion-resistant material, and the corrosion-resistant plating is at least some selected from the group hot-dip galvanizing, molten zinc-trivalent chrome-plating, and SeAHLume plating.
    [3]
    3. SeAHLume trivalent chrome plating. 10 15 20 25 30 536 230 16
    [4]
    Suction pipe device according to Claim 1, characterized in that the heat transfer pipe (30; 130) is made of aluminum. . Suction device according to claim 1, characterized in that the adhesive (50) is a thermally conductive material including a hardener and a filler, and that the filler comprises something selected from the group comprising copper powder, aluminum powder, carbon black and ceramics. . A method of manufacturing a suction pipe device comprising: manufacturing a heat transfer tube (30; 130) having an inner diameter corresponding to an outer diameter of a capillary tube (20) using a drawing method; cutting the heat transfer tube (30; 130) to a fixed length; insertion of the capillary tube (20) into the heat transfer tube (30; 130); forming a contact piece (40; 140) on the heat transfer tube (30) by roll forming with the capillary tube inserted therein; forming the connector (40; 140) on the outer circumferential surface of a suction tube (10; 110; 210) so that a width (W) of the connector (40; 140) does not fall below an outer diameter (W ') of the heat transfer tube (30) ; 130); characterized by the following steps: shaping the connector (140) so as to include projections (147) at both ends in a longitudinal direction of the connector (140); forming connecting grooves (115) in the suction pipe (10; 110; 210), in accordance with the projections (147) for receiving the projections (147) in the connecting grooves (115); and connecting the connector (40; 140) and the outer circumferential surface of the suction tube (10) by any of welding, soldering, brazing or an adhesive (50).
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    同族专利:
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    法律状态:
    2015-03-03| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020080047808A|KR20090121753A|2008-05-23|2008-05-23|Suction pipe assembly and manufactruing method for suction pipe assembly|
    PCT/KR2008/004161|WO2009142356A1|2008-05-23|2008-07-16|Suction pipe assembly|
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