JPH09145277A - Tube for capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a pressure-proof force and a contact area with the surrounding atmosphere by a method wherein an aluminum plate material having a plurality of ribs projected therefrom is bent into a flat pipe in which these ribs are positioned inside, extremity end surfaces of these opposing ribs and both end surfaces of the aluminum plate material are abutted to each other, and these abutting parts are connected to each other. SOLUTION: Ribs 22L1 , 22L2 , 22L3 and 22L4 are arranged in sequence at one surface of an aluminum plate member 21 in a predetermined interval in parallel to each other from a center line toward a left side. Ribs 22R1 , 22R2 , 22R3 and 22R4 are arranged in sequence from a center line toward a right outside. Each of these ribs is positioned inside by an electric welded tube manufacturing machine, an extremity end surface 23 of the rib 22L1 is abutted against an extremity end surface 23 of the rib 22R1 , an extremity end surface 23 of the rib 22L2 is abutted against an extremity end surface 23 of the rib 22L3 is abutted against an extremity end surface 23 of the rib 22R3 and an extremity end surface 23 of the rib 22L4 is abutted against an extremity end surface 23 of the rib 22R4 , respectively, so as to make their respective connections. Both end surfaces 24 are bent and formed and their abutting portions are connected to each other. With such an arrangement as above, it is possible to increase a pressure-proof force and a contact area with the surrounding atmosphere.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a condenser tube.

[0002]

2. Description of the Related Art Freon 12 is a condenser.
This is a device that cools and liquefies the vapor of a refrigerant such as (Freon 12) or Freon. This condenser is also used in automobile air conditioners.
In an air conditioner, when a refrigerant liquid evaporates in an evaporator, it absorbs heat from the outside to produce a cooling effect, and the evaporated refrigerant vapor is a compressor.
Compressed at high temperature and high pressure and sent to the condenser. In the condenser, the refrigerant vapor is cooled by the traveling wind of the vehicle or the cooling air of the fan, radiates heat and liquefies. The liquefied refrigerant passes through the expansion valve, undergoes adiabatic expansion, enters the evaporator, and produces the cooling effect again. The air conditioning in the automobile is performed using this cooling effect.

In the condenser of the air conditioner as described above, since the refrigerant vapor is compressed by the compressor and sent at high temperature and high pressure, the condenser tube has excellent pressure resistance, and the condenser tube is improved in order to increase the heat radiation effect. It is required that the contact area in contact with the outside air be increased. On the other hand, in the condenser, one chirp that guides the high-temperature and high-pressure refrigerant vapor to cool and liquefy it is made to meander, and the tube is made of extruded shape and has a number of flow paths. There are a serpent type condenser in which fins are interposed between them, and a parallel type condenser in which a large number of tubes are arranged in parallel between both head tubes and fins are interposed between the tubes. Parallel-type condensers are superior to serpent-type condensers in mixing and dispersing high-temperature, high-pressure refrigerant vapors and liquefied refrigerants.

Further, since a high pressure is supplied to the condenser tube, a pressure resistance is required. The pressure of the tube of the radiator for automobiles is about 1kg / cm ² , whereas the condenser is supplied with high pressure refrigerant vapor of 30kg / cm ² , so the pressure resistance is required and the test pressure is 45kg / cm 2.
² , the guaranteed pressure is 50-100 kg / cm ² . Further, in order to increase the heat dissipation effect of the tube, it is required to increase the contact area with the atmosphere.

[0005]

The condenser tube is fed with high-temperature and high-pressure refrigerant vapor compressed by a compressor, and has to cool and radiate the refrigerant vapor to liquefy it. It is required to increase the contact area of the.

[0006]

In view of the above-mentioned circumstances, the present invention has made the tubes of the condenser parallel to one surface of the aluminum plate material at a predetermined interval in order to increase the pressure resistance and the contact area with the atmosphere. A plurality of ribs are projected as one piece, and the aluminum plate material with the ribs projected is bent into a flat tube in which the ribs are located inside and the opposite end surfaces of the ribs and the end surfaces of both ends of the aluminum plate material contact each other. Let
A condenser tube was obtained by joining the contact portions.

Further, as a more specific structure of the present invention, a plurality of ribs are integrally projected in parallel at a predetermined interval on one surface of an aluminum plate material having both surfaces coated with a brazing material, and the ribs are projected. The bent aluminum plate is bent into a flat tube in which the ribs are located inside and the end faces of the facing ribs and the end faces of the aluminum plate are in contact with each other, and the end faces of the plate are joined by welding to form a rib. A tube for capacitor was obtained by heating the tip surfaces of each other in a furnace and joining them together.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The tube of the present invention is used for a condenser. Capacitors are also used in automobile air conditioners. In the air conditioner, as shown in FIG. 1, when the refrigerant liquid evaporates in the evaporator 1, it absorbs heat from the outside to provide a cooling effect, and the evaporated refrigerant vapor is compressed by the compressor 2 to become high temperature and high pressure. It is sent to the condenser 3. In the condenser 3, the refrigerant vapor is cooled by the traveling wind of the vehicle or the cooling wind of the fan and radiates heat to be liquefied. Here, the liquefied refrigerant passes through the expansion valve 4, undergoes adiabatic expansion, enters the evaporator 1, and produces the cooling effect again. The air conditioning in the automobile is performed using this cooling effect.

In the condenser of the air conditioner as described above, since the refrigerant vapor is compressed by the compressor and is sent at high temperature and high pressure, the condenser tube is required to have excellent pressure resistance, and the heat radiation is also required. In order to increase the effect, it is required that the contact area of the condenser tube in contact with the outside air be increased. Capacitors include parallel type capacitors and serpent type capacitors.

The parallel type condenser has the outline shown in FIGS. 2 and 3, in which head tubes 5 and 6 are arranged at the upper and lower sides,
The head tube 5 and the head tube 6 are connected by a large number of flat tubes 7, and fins 8 are contacted between the tubes 7. Reference numeral 8 is a partition wall between IN and OUT. Refrigerant vapor that has reached a high temperature and high pressure in the compressor 2 that has entered from the IN portion of the head tube 5 passes through multiple tubes 7 and is cooled by the running wind of the car and the cooling air of the fan. It reaches the head tube 6 while radiating heat. The refrigerant vapor reaching the head tube 6 is mixed in the head tube 6, dispersed and flows into the tube 7 again, and in the same manner, it radiates heat to reach the head tube 5 and is mixed and liquefied in the head tube 5. Refrigerant liquid flows out from OUT.

On the other hand, the serpent type condenser has the outline shown in FIGS. 4 and 5. One flat tube 11 that guides the high-temperature, high-pressure refrigerant vapor to cool and liquefy it is meandered. The tube 11 is made of aluminum extruded shape and has many flow paths 12. , Meandering tube
A fin 12 is contacted between 11 and. Refrigerant vapor that has entered the IN area and has a high temperature and high pressure in the compressor 2 passes through a single tube 11 that has a plurality of flow paths 12, and is cooled by the vehicle running air and the cooling air from the fan. 11 and fin 12 liquefy while radiating heat and OUT
More outflow.

As described above, since the parallel type condenser mixes and disperses the refrigerant vapor, it is said that the parallel type condenser is superior to the serpent type condenser in heat dissipation performance. By the way, the tube of the condenser of the present invention is manufactured as follows. First, as shown in the cross section of FIG. 6, an aluminum plate material coated with a brazing material on both sides.
Prepare 21.

Next, as shown in FIG. 7, a plurality of ribs 22 are projected as one piece in parallel on one surface of the aluminum plate member 21 at predetermined intervals L ₁ , L ₂ and L ₃ . Here, the protrusion of the rib 22 as an integral member means that the rib and the portion other than the rib are formed from one object, rather than joining the rib of another body by welding or the like. Since the rib and the portion other than the rib are formed by one body, heat is well transferred.

Predetermined intervals L ₁ , L ₂ , L on one surface of the aluminum plate member 21.
To be projected as one piece parallel to the plurality of ribs 22 at _3, there are three method shown in FIGS. 8 to 10. As shown in FIG. 8, an aluminum plate 21 having a plate thickness t indicated by a chain double-dashed line is roll-formed by a roll so that the rib 22 is projected beyond the plate thickness t.
Next, as shown in FIG. 9, an aluminum plate 21 having a plate thickness t indicated by a chain double-dashed line is roll-formed by a roll to form ribs 22 at a plate thickness t.
It is intended to project to a certain degree.

Further, as shown in FIG. 10, an aluminum plate 21 having a plate thickness t indicated by a chain double-dashed line is cut to remove a hatched portion so that a rib 22 is projected. As shown in FIG. 11, an aluminum plate member 21 having a plurality of ribs 22 integrally formed in parallel on one surface at predetermined intervals L ₁ , L ₂ and L ₃ as described above is projected by an electric resistance welded pipe manufacturing machine. The flat pipe is bent and formed by a large number of forming rolls so that the end faces 23 of the ribs 22 located inside and the opposing ribs 22 and the end faces 24 at both ends of the aluminum plate member 21 come into contact with each other.

Here, the tip surfaces 23 of the ribs 22 facing each other
Is abutting means that the center line AA of the aluminum plate material 21
22 ribs in order_L1·twenty two_L2·twenty two_L3... and center line A-A
22 from the right to the outside_R1·twenty two_R2·twenty two_R3...
Rib 22_L1Tip surface 23 and rib 22 _R1Tip surface 23, rib 22_L2of
Tip surface 23 and rib 22_R2Tip surface 23, rib 22_L3The tip surface 23 of
Rib 22_R3Tip surface 23 of ... By abutting each other
is there.

The aluminum plate 21 is bent into a flat tube by gradually deforming it with a roll of an electric resistance welding machine.
Moreover, since the end faces 24 at both ends of the aluminum plate member 21 can be formed at 90 degrees at the same time when the ribs are formed, the end faces 24 can be sufficiently joined to each other to form a complete seam. The end surfaces 24 of the aluminum plate 21 formed on the flat tube, which are in contact with each other at both ends, are heated by a welding device of an electric resistance welded pipe manufacturing machine to a welding temperature extremely quickly by a low pressure and large current, and rolled from the side. Hold down and weld the end face 24. In this way, the end faces of the aluminum plate 21 that are in contact with both ends
The 24 is welded by electric resistance heat so that the seam of the joint portion of the end face 24 can be seen in a straight line in the axial direction of the outer surface of the flat tube. Subsequent to this welding operation, the welding burrs on the inner and outer surfaces are scraped off, passed through a cooling device, and formed into a predetermined size with a regular roll.

Here, the aluminum plate material 22 used has a cross section as shown in FIG. 12, and is made of aluminum. On both sides, about 10% of the plate thickness t is made of aluminum (+) silicon. The melting point of aluminum (+) silicon is 540-570 ℃, while the melting point of 650 ℃ is 650 ℃. After the end faces 24 of the aluminum plate member 21 which are in contact with each other at both ends are welded by an electric resistance welded pipe manufacturing machine, they are put into a furnace and heated. Then, as shown in FIG. 13, the above-mentioned aluminum (+) silicon exists between the tip surfaces 24 of the ribs 22, and since the melting point is lower than that of aluminum, the ribs are melted first and fused and bonded. It is advisable to apply pressure from both sides to complete the connection.

The tube 25 and fins thus formed
As shown in FIG. 14, the fins 26 are contacted between the tubes 25, and when they are placed in a furnace and heated, the brazing filler metal 27 applied to the surface of the tubes 25 is bonded to the tubes 25 and the fins. It also penetrates into 26 due to the capillary phenomenon and fixes both.

[0020]

As described above, according to the present invention, a plurality of ribs are integrally projected on one surface of an aluminum plate material in parallel at predetermined intervals, and the ribs are positioned inside the rib. Then, bend the end faces of the ribs facing each other and the end faces of the both ends of the aluminum plate member into a flat tube that abuts against each other,
Since the condenser tube is formed by joining the abutting portions, it is possible to provide a tube with increased pressure resistance and a tube with an increased contact area with the atmosphere.

Further, according to the present invention, a plurality of ribs are integrally projected at a predetermined interval in parallel on one surface of an aluminum plate material coated with a brazing material on both sides, and the rib is provided inside the aluminum plate material. Bend the end faces of the ribs facing each other and the end faces of the aluminum plate material into a flat tube that abuts against each other, join the end faces of the plate members by welding, and place the end faces of the ribs in the furnace. Since it is a condenser tube that is heated and joined, it is possible to provide a tube having a more specific structure, excellent pressure resistance, and an increased contact area.

[Brief description of the drawings]

FIG. 1 is a diagram showing a principle of an air conditioner.

FIG. 2 is a front view of a parallel type capacitor.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view showing an outline of a serpen type condenser.

5 is a cross-sectional view of the tube of FIG.

FIG. 6 is a cross-sectional view of an aluminum plate material for manufacturing the tube of the present invention.

FIG. 7 is a cross-sectional view in which a plurality of ribs are integrally projected in parallel with one surface of an aluminum plate material at a predetermined interval.

FIG. 8 is a cross-sectional view of a state in which ribs are projected from the plate thickness t by roll forming an aluminum plate material having a plate thickness t.

FIG. 9 is a cross-sectional view showing a state in which a rib is projected to a plate thickness t by molding a plate material having a plate thickness t indicated by a two-dot chain line with a roll.

FIG. 10 is a cross-sectional view of a state in which an aluminum plate material having a plate thickness t indicated by a two-dot chain line is cut to remove a hatched portion and a rib is projected.

FIG. 11 is a cross-sectional view showing a state in which a flat pipe is bent and formed by an electric resistance welded pipe manufacturing machine so that tip ends of ribs located inside and ribs facing each other and end faces of both ends of an aluminum plate member come into contact with each other.

FIG. 12 is a cross-sectional view of an aluminum plate material.

FIG. 13 is an enlarged sectional view of an abutting portion of a rib of the flat tube of the present invention.

FIG. 14 is an enlarged view of a joint portion between the tube and the fin of the present invention.

[Explanation of symbols]

 1 ... Evaporator 2 ... Compressor 3 ... Condenser 4 ... Expansion valve 5 ... Head tube 6 ... Head tube 7 ... Tube 8 ... Fin 11 ... Tube 12 ... Fin 13 ... Flow path 21 ... Aluminum plate 22 ... Rib 23 ... Tip surface 24 ... End surface 25… Tube 26… Fin 27… Brazil material

Claims (2)

[Claims] 1. A plurality of ribs are integrally projected on one surface of an aluminum plate material in parallel at a predetermined interval, and the aluminum plate material having the ribs protruded between the tip surfaces of the ribs located inside and facing each other. A condenser tube formed by bending a flat tube in which both end surfaces of an aluminum plate member are in contact with each other and joining the contact portions. 2. A plurality of ribs are integrally projected on one surface of an aluminum plate material coated with a brazing material on both sides in parallel at a predetermined interval, and the aluminum plate material having the ribs is located inside and opposed to each other. The tip surfaces of the ribs and the end surfaces of both ends of the aluminum plate material are bent into a flat tube in contact with each other, and the end surfaces of both ends of the plate material are joined by welding, and the tip surfaces of the ribs are heated and joined in a furnace. This is a condenser tube.