专利汇可以提供PLASTIC HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME专利检索,专利查询,专利分析的服务。并且Disclosed is a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes. The present invention provides a method of fabricating a plastic heat exchanger, comprising a step of melting and pressing a plastic heat exchanger tube and a junction of a header by using a heat fusion jig, and a plastic heat exchanger fabricated by the method, thereby securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.,下面是PLASTIC HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME专利的具体信息内容。
The present invention relates to a plastic heat exchanger and a method of manufacturing the same, and particularly, to a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, thereby having heat exchange performance more excellent than or equal to a metallic heat exchanger, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes.
In a general heat exchanger, as shown in
Meanwhile, in order to solve the problem, there was proposed a joint method between a tube and a tube header for a plastic heat exchanger (Korean Patent No.
An object of the present invention is to provide a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, thereby having heat exchange performance more excellent than or equal to a metallic heat exchanger, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes.
To achieve the object, there is provided a method of fabricating a plastic heat exchanger, comprising a tube coupling step for coupling the heat exchanger to the header, a heat fusion step for melting and pressing the heat exchanger tube coupled to the header by using heat, and a header coupling step for coupling the header cap to the header which is joined to the plastic heat exchanger tube, wherein the plastic heat exchanger tube and a junction of the header are melted and joined by using a heat fusion jig.
The junction of the header comprises a fusion bead, projecting from the even header surface, which is coupled to the plastic heat exchanger tube and then melted by heat; and a melted material inflow groove recessed below the header surface which groove is formed along an outer circumferential surface of the fusion bead so that the melted material is inflowed therein. Thus, the plastic heat exchanger tube and the header can be firmly joined to each other, thereby securing the air-tightness of refrigerant.
Preferably, the melted material inflow groove is formed to have a predetermined width w and a predetermined angle θ so as to prevent the leakage of the melted material and firmly join the melted material and also firmly form a shape after the fusing process.
Preferably, the heat fusion jig comprises an insertion portion which is formed into a conical shape so be smoothly inserted into the plastic heat exchanger tube; a body which has an outer diameter corresponding to an inner diameter of the plastic heat exchanger tube so as to maintain an internal shape of the plastic heat exchanger tube upon the heat-fusing process; a fusion portion which is formed at an upper portion of the body to be inclined at a predetermined angle so that the melted material of the heat exchanger tube and the fusion bead can be smoothly inflowed into the melted material inflow groove; and a fusion valley which is joined to the melted material inflow groove to prevent a leakage of the melted material and which forms a shape after the joining process.
A plastic heat exchanger which is fabricated by heat-fusing a plastic heat exchanger tube and a header using a heat fusion jig comprises a fusion bead which is joined to a junction of the header and then melted together with an end of the heat exchanger tube by heat; and a melted material inflow groove which is formed along an outer circumferential surface of the fusion bead so that melted material is inflowed therein.
Preferably, the plastic heat exchanger according to claim 4, wherein the heat fusion jig comprises an insertion portion which is formed into a conical shape; a cylindrical body which has an outer diameter corresponding to an inner diameter of the heat exchanger tube; a fusion portion which is formed at an upper portion of the body to be inclined at a predetermined angle; and a fusion valley which is joined along the melted material inflow groove of the header to prevent a leakage of the melted material.
According to the present invention, since the heat exchanger tube and the header can be firmly coupled, there are some advantages of securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.
The above and other objects, features and advantages of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which:
Hereinafter, the embodiments of the present invention will be described in detail with reference to accompanying drawings.
Further, in the injection process, first of all, an injection mold having a predetermined shape is prepared, and resin like melted plastic is filled therein and then solidified to form a production. The injection process is also proper for mass-production at low fabricating cost.
The junction portion of the header 6 is formed with a fusion bead 6a which is melted together with the plastic heat exchanger tube 5 by the heat. Therefore, when the junction portion of the header 6 and the heat exchanger tube 5 are fused by the heat fusion jig 8, the joining therebetween becomes firm. In the above process, the melted material of the junction portion between the heat exchanger tube 5 and the header 6 is inflowed into a melted material inflow groove 6b formed along an outer circumferential surface of the fusion bead 6a. At this time, the melted material is guided by a fusion portion 8c of the heat fusion jig 8 so as to be facilely inflowed in the melted material inflow groove 6b. By a fusion valley 8d of the heat fusion jig 8 which is joined along the melted material inflow groove 6b, a leakage is prevented and also a shape after the fusing process can be formed. Thus, the plastic heat exchanger tube 5 and the header 6 can be firmly joined, thereby perfectly maintaining air-tightness for refrigerant.
In addition, as shown in
As shown in
The body 8b is formed into a cylinder shape having an outer diameter corresponding to an inner diameter of the plastic heat exchanger tube 5 so as to maintain an internal shape of the plastic heat exchanger tube 5 upon the heat-fusing process.
The fusion portion 8c is formed at an upper portion of the body 8b to be inclined toward the melted material inflow groove 6b so that the melted material of the heat exchanger tube 5 and the fusion bead 6a of the header 6 can be smoothly inflowed into the melted material inflow groove 6b. Preferably, the inclined angle θ is correspondent to the angle of the melted material inflow groove 6b.
Further, the fusion valley 8d is joining along the melted material inflow groove 6b so as to prevent the leakage of the melted material and also form the shape after the joining process. Herein, the joining shape after the heat fusion process between the plastic heat exchanger tube 5 and the junction of the header 6 is determined according to a shape of an inner valley of the fusion valley 8d.
According to the present invention, since the heat exchanger tube and the header can be firmly coupled, there are some advantages of securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.
Those skilled in the art will appreciate that the conceptions and specific embodiments disclosed in the foregoing description may be readily utilized as a basis for modifying or designing other embodiments for carrying out the same purposes of the present invention. Those skilled in the art will also appreciate that such equivalent embodiments do not depart from the spirit and scope of the invention as set forth in the appended claims.
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