KR100366431B1 - The joint method between tube header and header tank for plastic heat exchanger - Google Patents

Abstract

The present invention relates to a method for joining a header tank of a heat exchanger, and more particularly, to a method of joining a header tank of a plastic heat exchanger in which a tube header and a header tank are ultrasonically fused using a plastic material of the heat exchanger.

The method of joining a header tank of a heat exchanger according to the present invention includes: forming a fin-tube group on a periphery of a plastic refrigerant tube; Forming a tube group header in double injection on both ends of the plastic tube; Coupling a header tank made of plastic on the pipe group header made of plastic; And installing a piezoelectric device on the plastic header tank and applying ultrasonic waves to the plastic header tank through the piezoelectric device to cause mechanical vibration to thermally fusion the header tank made of plastic and the tube group header made of plastic. It is done.

Description

Joining header tank of plastic heat exchanger {THE JOINT METHOD BETWEEN TUBE HEADER AND HEADER TANK FOR PLASTIC HEAT EXCHANGER}

The present invention relates to a method for joining a header tank of a heat exchanger, and more particularly, to a method of joining a header tank of a plastic heat exchanger in which a tube header and a header tank are ultrasonically fused using a plastic material of the heat exchanger.

As shown in FIG. 1, a heat exchanger used in a conventional refrigerator evaporator has a fin 4 formed on an outer circumference of a metal refrigerant pipe 1 composed of a plurality of refrigerant inlet pipes 2 and a refrigerant outlet pipe 3. A left header (not shown) and a right header 6 made of metal are joined to the left and right ends of the metal refrigerant pipe 1, and defrost pipes 7 are formed on both sides of the metal refrigerant pipe 1. This is installed.

Referring to the operation of the conventional heat exchanger configured as described above is as follows.

Refrigerant is introduced through the refrigerant inlet pipe 2 at the left end of the evaporator to reach the refrigerant outlet pipe 3 in the direction of the refrigerant pipe having a horizontal serpentine shape. In this process, the cold vessel is evaporated and heat exchanged through latent heat and sensible heat exchange. At this time, the refrigerant passing through the refrigerant outlet tube (3) passes through the accumulator (8), which plays two roles of the refrigerant storage tank thermal degradation and the water-liquid separator for the load response according to the environmental conditions around the refrigerator. Since the defrosting tube 7 must periodically defrost the ice adhering to the evaporator surface, an electric heating heater is used, and the defrosting tube 7 is almost in line contact with the defrosting end.

FIG. 2 is a tri-tube evaporator having a fin-refrigerant tube-defrost tube made in Japan as another heat exchanger used in a conventional refrigerator evaporator.

As shown in FIG. 2, the fin 12 is formed on the outer periphery of the metal refrigerant pipe 11, and the defrosting tube 13 is formed on the outer periphery of the fin 12.

The refrigerant flows through the left end of the tree tube (10) at the left end of the evaporator and flows through the serpentine tri tube (10). It is a structure which flows out through the radar 15.

As described above, the conventional fin-tube evaporator has a structure in which the metal refrigerant pipe 11 and the fin 12 are coupled by expansion of the refrigerant pipe 11, and accumulator ( 15) is welded to cause noise when the refrigerator is turned on or off. Therefore, such a conventional coupling method cannot be used in a plastic heat exchanger as in the present invention.

The present invention is to solve the problems as described above, to provide a method of joining the heat exchanger and the header tank of the plastic material, and to eliminate the abnormal noise generated by the accumulator installed at the outlet end of the refrigerant pipe The present invention provides a method for joining a header tank of a heat exchanger.

1 is a schematic diagram of a heat exchanger used as an evaporator of a conventional refrigerator.

2 is a schematic diagram of another heat exchanger used as an evaporator of a conventional refrigerator.

3 is a conceptual diagram of a tree tube applied to FIG. 2.

4 is a schematic view of a plastic heat exchanger according to the present invention.

5 is a cross-sectional view showing a state in which the heat exchanger and the tube group header and header tank is combined in the plastic heat exchanger according to the present invention.

FIG. 6 is a view illustrating a process in which a heat exchanger group, a tube group header, and a header tank are joined in the plastic heat exchanger according to the present invention.

7 is a view schematically showing a method of joining a tube group header and a header tank using a piezoelectric device in a plastic heat exchanger according to the present invention.

<Explanation of symbols for the main parts of the drawings>

112: plastic heat exchanger 114: refrigerant tube

116: 휜 118: 휜 -Kwangun

120: gungun header 124: left header tank

126: right header tank 128: piezoelectric device

130: refrigerant inlet pipe 132: refrigerant outlet pipe

The present invention provides a fin-tube group forming step of forming a fin of the plastic material on the outer periphery of the refrigerant pipe of the plastic material to achieve the above object; Forming a tube group header in double injection on both ends of the plastic tube; Coupling a header tank made of plastic on the pipe group header made of plastic; And installing a piezoelectric device on the plastic header tank and applying ultrasonic waves to the plastic header tank through the piezoelectric device to cause mechanical vibration to thermally fusion the header tank made of plastic and the tube group header made of plastic. It provides a header tank joining method of a plastic heat exchanger.

In addition, the piezoelectric device is a mechanical heat exchanger to maintain the mechanical up and down vibration energy of 15,000 / sec, the excitation amplification is 0.06 ~ 0.08mm (pp) so that the joining time is within 1 second It provides a method for joining the header tank of the machine.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a schematic view of a plastic heat exchanger according to the present invention, Figure 5 is a cross-sectional view showing a state in which the heat exchanger and tube group header and header tank is coupled in the plastic heat exchanger according to the present invention, Figure 6 In the plastic heat exchanger according to the present invention, FIG. 7 is a view illustrating a process of joining a tube-tube group, a tube group header, and a header tank, and FIG. Figure is a schematic diagram.

4 to 7, the plastic heat exchanger 112 according to the present invention, after forming a plastic fin 116 integrally on the outer periphery of the refrigerant pipe 114 of the plastic material of the refrigerant pipe 114 Insert the group header 120 at the end and bonded the header tank 122 of plastic material thereon.

When the plastic heat exchanger 112 of the present invention is described in more detail, as shown in FIGS. 4 and 5, the fin 116 is formed on the outer circumference of the refrigerant pipe 114 formed at a plurality of predetermined intervals. Unless otherwise specified in the present invention, the components of the heat exchanger are all made of plastic. The coolant tube 114 and the fin 116 are integrally formed, and the meaning of the fin-tube group 118 refers to a collection of a plurality of refrigerant tubes 114 and a plurality of fins 16.

The left header tank 124 is coupled to the left side of the X-tube group 118, and the right header tank 126 is coupled to the right side of the X- tube group 118. The right header tank 126 is connected to the refrigerant inlet pipe 130 at the bottom, the refrigerant outlet pipe 132 is connected to the top.

The coupling structure of the X-tube group 118 and the header tanks 124 and 126 will be described in detail with reference to FIG. 5.

As shown in FIG. 5, in order to couple the tuber group 118 to the header tanks 124 and 126, a tuber group header 120 is installed to fix the tuber group 118 to one end of the tuber group 118. do. Here, the kwan-gwan group 118 and the kwan-gun header 120 is formed by integral injection.

The tube group header 120 is heat-sealed by the header tanks 124 and 126 by ultrasonic waves. The coupling method of the tube group header 120 and the header tanks 124 and 126 is as shown in FIG.

6 and 7, the ends of the separator 134 of the header tanks 124 and 126 are closely contacted between one side group header 120 and the other side group header 120 at the center upper portion of the tube group header 118. After mechanical vibration energy is applied to the header tanks 124 and 126 through the piezoelectric device 128, the tube group header 120 and the header tanks 124 and 126 are bonded by ultrasonic molding.

That is, the piezoelectric device 128 is accompanied by a process of converting the mechanical up and down vibration energy of 15,000 / sec, in this process, the header tanks (124, 126) is combined with the tube group header 120. At this time, the amplification is 0.06 ~ 0.08 mm (p-p), and the sample adhesion time due to frictional heat is long within 1 second.

As described above, the conventional evaporator of the tube-pipe structure can eliminate abnormal noise generated when the refrigerator is turned on / off due to the accumulator installed at the outlet end of the refrigerant pipe, and the header tank is bonded using ultrasonic waves. As a result, it is easy to manufacture a heat exchanger made of plastic, and as a result, manufacturing cost of the heat exchanger can be reduced.

Claims (2)

Forming a fin-tube group on the outer periphery of the plastic refrigerant tube; Forming a tube group header in double injection on both ends of the plastic tube; Coupling a header tank made of plastic on the pipe group header made of plastic; And installing a piezoelectric device on the plastic header tank and applying ultrasonic waves to the plastic header tank through the piezoelectric device to cause mechanical vibration to thermally fusion the header tank made of plastic and the tube group header made of plastic. Joining method of header tank of plastic heat exchanger. The method of claim 1, The piezoelectric device maintains mechanical up and down vibration energy of 15,000 / sec, and the amplification is 0.06 ~ 0.08mm (pp) so that the joining time is within 1 second of the plastic heat exchanger How to join header tank.