CN1475710A

CN1475710A - Heat exchanger and its mfg. method

Info

Publication number: CN1475710A
Application number: CNA021302235A
Authority: CN
Inventors: 河合雅史; 山崎康
Original assignee: Nishiki Co Ltd
Current assignee: Nishiki Co Ltd
Priority date: 2002-08-15
Filing date: 2002-08-15
Publication date: 2004-02-18
Anticipated expiration: 2022-08-15
Also published as: HK1062708A1; CN100409969C

Abstract

A heat exchanger and its manufacture are disclosed. An enlarged part and a flange part are made at the end part of a pipe by punch, and a flange member is matched to said enlarged part and flange part to form a pipe jointer for connecting the pipe to external pipe. Its advantages are simple technology and low cost.

Description

The manufacture method of heat exchanger and heat exchanger

Technical field

The present invention relates to possess the fin tube type heat exchanger and the manufacture method thereof of many pieces of fins and pipe, relate in particular to improvement the pipe joint that pipe is connected in outside pipe arrangement is constructed, with the technology of seeking to cut down cost of manufacture, manufacturing cost and improving quality.

Background technology

In the past, water heater was generally used fin tube type heat exchanger.As Fig. 6, shown in Figure 7, heat exchanger 30 has many pieces of fins 33 of outer body shell 31, many pipes 32 and outer body shell 31 inside etc., when the hot water supply moves, make the combustion chambers burn operation on one side, drive supply fan on one side, if supply water, then be heated to the above hot water of heat supply coolant-temperature gage and just discharge from the heat supply mouth of a river 35 of pipe 32 from the supply mouth of a river 34 of pipe 32.Pipe reciprocally connects outer body shell 31 and many pieces of fins 33 for more than 32 time, and the position that pipe 32 connects outer body shell 31 and many pieces of fins 33 engages with furnace brazing.The water inlet 34 of pipe 32 and 35 places, the heat supply mouth of a river use soldering and engage the brazen pipe joint 36 that machining forms behind forging and molding.

Detailed Description Of The Invention

In described heat exchanger in the past, assemble many pipelines, outer body shell and many pieces of fins, soldering object place at these heat exchange assemblys settles solder, again this heat exchange assembly is contained in soldering oven inside, carry out furnace brazing with about 800～850 degree, then to the head portion of heat-transfer pipe brazed pipe joint by hand.Because pipe joint is brazen, if in soldering oven, carry out soldering, can Yin Gaowen causes and take off plumbous phenomenon, thereby bad etc. the unfavorable condition of the bad and outward appearance of the insufficient strength, the surface roughness that cause because of changes in material takes place.

Manual brazed pipe joint is the operation that needs a lot of staff and machining period number, cost of manufacture height not only, and the automation of parts manufacturing also produced obstacle.

The objective of the invention is to reduce the machining period number of heat exchanger, and reduce cost of manufacture.

Technical scheme 1 described heat exchanger, it is the fin tube type heat exchanger that possesses many pieces of fins and Duo Gen pipeline, it is characterized in that, form in the end of described pipe through punch process and the expansion tube department of expander and form the flange part of one, constitute the pipe joint that pipe is connected usefulness with outside pipe arrangement by expansion tube department and flange part with this expansion tube department end.

Tube end forms expansion tube department through punch process, and this integrally formed flange part in expansion tube department end is made of the pipe joint that pipe is connected usefulness with outside pipe arrangement this expansion tube department and flange part.Form such pipe joint, owing to pipe pair and heat exchanger body and many pieces of fins can be carried out furnace brazing, therefore, pipe needn't manual brazed pipe joint after furnace brazing, the pipe joint structure is simplified, guaranteed the quality of pipe joint, can reduce the cost of manufacture of heat exchanger significantly.Because use as pipe joint the end of pipe, compare with the conventional art of using brazen pipe joint to constitute, can seek the lightweight of pipe joint.

Technical scheme 2 described heat exchangers, it is the fin tube type heat exchanger that possesses many pieces of fins and pipe, it is characterized in that, form in the end of described pipe through punch process and the expansion tube department of expander, form the flange part of one with this expansion tube department end and another flange component outside chimeric and that be close to flange part with expansion tube department, constitute pipe joint by expansion tube department, flange part and flange component, so that described pipe is connected with outside pipe arrangement.

End at pipe forms expansion tube department through punch process, is formed with flange part in this expansion tube department end, and in addition the flange component of body is set as outside chimeric and be close to state on the flange part with expansion tube department.Constitute pipe joint by this expansion tube department, flange part and flange component, pipe is connected to outside pipe arrangement.Because after forming this pipe joint, pipe and pipe body and many pieces of fins can be carried out furnace brazing, after pipe carries out furnace brazing, needn't implement manual soldering to pipe joint, can reduce cost of manufacture significantly, and,, can seek the lightweight of pipe joint so compare with described conventional art with the brass pipe joint because of constituting pipe joint with tube end and flange component.

The manufacture method of technical scheme 3 described heat exchangers, it is the method that

technical scheme

1 or 2 described heat exchangers are made, it is characterized in that, furnace brazing is carried out at whole solderings position of the many pipes, the many pieces of fins that contain the pipe that constitutes described pipe joint and the outer body shell of accommodating these fins.When making this heat exchanger, in the end of pipe pipe joint is set in advance, the many pipes that will comprise this pipe are installed on many pieces of fins and the outer body shell.Then, place many solders, constitute the heat exchange assembly, afterwards, this heat exchange assembly is contained in the soldering oven,, soldering is implemented at whole solderings position by heat-treating with set point of temperature according to these pipe installation positions.

If operation technique scheme 1 described invention, end at pipe forms expansion tube department through punch process, at the integrally formed flange part in the end of this expansion tube department, constitute pipe joint by these expansion tube departments and flange part, so that pipe is connected with outside pipe arrangement, so, form pipe joint simply with punch process etc., pipe is carried out furnace brazing in body housing, needn't be again after soldering artificial brazed pipe joint, this just can reduce cost of manufacture significantly, use as pipe joint the end of pipe, compares with the described conventional art of using brazen pipe joint, and the pipe joint structure is simplified, can seek the pipe joint lightweight, become favourable when being arranged at the hot water supply equipment who adopts this pipe 7 on the dwelling house wall.

If adopt technical scheme 2 described inventions, end at pipe forms expansion tube department through punch process, at the integrally formed flange part in the end of this expansion tube department, be provided with again that the outside is entrenched on the expansion tube department and be close to the flange component of body in addition of portion, constitute the pipe joint that pipe is connected usefulness with outside pipe arrangement by expansion tube department, flange part, flange component with flange.Therefore, available pressure processing etc. form simple pipe joint, pipe can be contained in and carry out the soldering furnace brazing in the body housing.Therefore, pipe carries out soldering in soldering oven after, needn't carry out manual soldering, can reduce cost of manufacture significantly pipe joint.Adopt flange component to constitute pipe joint, also can constitute the pipe joint that is not subjected to tubing and thickness of pipe restriction, obtain the effect same in addition with technical scheme 1.

If adopt technical scheme 3 described inventions, when making heat exchanger, pipe joint is set on pipe, the many pipes that will comprise this pipe are installed on many pieces of fins and the body housing, installation position according to these pipes, put many solders, constitute the heat exchange assembly, afterwards this heat exchange assembly is contained in and carries out heat treated in the soldering oven, soldering is implemented at whole soldering positions simultaneously, therefore, can simplify the manufacture method of heat exchanger, reduce manufacturing cost, and can advance heat exchanger to make the automation of line.

The accompanying drawing simple declaration

Fig. 1 is the front view of the heat exchanger of embodiment of the present invention.

Fig. 2 is the side view after the part of heat exchanger is dissectd.

Fig. 3 is the heat exchanger vertical view.

Fig. 4 is the rearview after the part of heat exchanger is dissectd.

Fig. 5 is the in-built phantom of expression pipe joint.

Fig. 6 is the front view of heat exchanger in the past.

Fig. 7 is the expanded view of pipe joint and pipe relation in the past.

The working of an invention method

Following with reference to the description of drawings embodiment of the present invention.Present embodiment is the occasion of heat exchanger application of the present invention in the heat exchanger of the fin tube type that is used for water heater.The explanation of the manufacture method that also comprises heat exchanger below is described in addition.

As Fig. 1～shown in Figure 4, heat exchanger 1 is to be used for the water heating that the outside is supplied with reached answering more than the supply temperature and the equipment of discharging through the heat supply mouth of a river.Heat hands over outer body shell 2 inside of ironware 1 to be incorporated with the copper pipe 3 of many pieces of fins 6, heat exchanger 1, and the also repeatedly reciprocal shape that links to each other by the outside feed pipe 3a of outer body shell 2, with feed pipe 3a connects many pieces of the fin 6 and finned tube 3b of outer body the shell 2 and hot water supply pipe 3c that links to each other with this finned tube 3b and constitutes.If make the not shown combustion chamber that is equipped on heat exchanger 1 below burn operation, supply water from feed pipe 3a, then heating reaches the above hot water of hot water supply temperature, from the heat supply mouth of a river discharge of hot water supply pipe 3c.

Then, describe the structure of this heat exchanger 1 in detail.

As Fig. 1～shown in Figure 5, the many pieces of fins 6 that constitute than sheet copper or corrosion resistant plate are accommodated guaranteeing heat transfer area greatly in the inside of outer body shell 2, and many pieces of fins 6 insert inner from the upper opening portion of body housing 2.Finned tube 3b connects many pieces of fins 6 and outer body shell 2 at the number place.The position that connects many pieces of fins 6 at finned tube 3b forms solder installation pit 5, to place the clavate solder.

Pipe 3a～3c is being assemblied under the dress attitude of many pieces of fins 6 and body housing 6, clavate solder (for example silver solder) is contained in each solder installation pit 5, and at the position that finned tube 3b runs through body housing 2, puts C shape solder 4 in the peripheral part of finned tube 3b.And, also put C shape solder at the junction surface of feed pipe 3a and finned tube 3b and the junction surface of finned tube 3b and hot water supply pipe 3c.

There is the heat exchange assembly of many solders to be contained in the soldering oven storing like that as described, just soldering implemented at the position of all soldering objects in several 10 minutes through about 800～850 degree heat treatments.The top ends of feed pipe 3a is stamping and becomes slightly undergauge shape, the top ends of this undergauge to be embedded in the end of finned tube 3b to carry out soldering.Equally, the top ends of hot water supply pipe 3c also is stamping slightly undergauge shape, and the top ends of this undergauge is embedded in the end of finned tube 3b, carries out soldering.

The structure of the pipe joint 7 that feed pipe 3a and hot water supply pipe 3c are connected with outside pipe arrangement then, is described.Top ends at feed pipe 3a and hot water supply pipe 3c is provided with pipe joint 7 respectively.These pipe joints are same structures, so be located at pipe joint 7 on the hot water supply pipe 3c with reference to Fig. 5 explanation.

Pipe joint 7 comprises: the expansion tube department 8 that forms at the head portion of pipe 3c; The flange part 9 integrally formed with these expansion tube department 8 ends; For example with pipe 3c in addition body, the flange component 10 of stainless steel for example.Expansion tube department 8 is the end specific length of pipe 3c to be carried out the punch process expander form, and when expander forms, on the top ends of this expansion tube department 8, be formed with from the flange part 9 of expansion tube department 8, be formed with tapered portion 11 on the base end part of expansion tube department 8 to the outside diameter bending.

Flange component 10 is placed in described expander and forms on the mould of usefulness, carrying out expander under the state of the end of pipe 3c insertion flange component 10 is shaped, therefore, flange component 10 outside securely is entrenched on the expansion tube department 8, and reaches the state of firmly being close to flange part 9.

Flange component 10 is by constituting than big flange part body 10a of flange part 9 diameters and the minor diameter part 10b slightly littler than flange part 9 diameters.

The effect of described heat exchanger 1 then, is described.

If adopt the heat exchanger 1 of described explanation, because at pipe 3a, the end of 3c forms the expansion tube department 8 that forms through the punch process expander, be shaped and the flange part 9 integrally formed by this expander with expansion tube department 8 ends, and the flange component 10 of body in addition that is provided with that the outside is entrenched on the expansion tube department 8 and is close to flange part 9, by described expansion tube department 8, flange part 9, flange component 10 constitutes the pipe joint 7 that is connected with outside pipe arrangement, thereby, pipe joint 7 simple structures, because this pipe joint 7 is being pre-formed at pipe 3a, under the state on the 3c, can carry out furnace brazing to the soldering object position of heat exchanger 1, therefore, after handling, furnace brazing needn't carry out the manual soldering of pipe joint 7, can reduce the cost of manufacture of heat exchanger 1 significantly, and can realize high-quality pipe joint 7 by simple structure, thereby realize light-duty pipe joint 7.

Because of end and flange component 10 with

pipe

3a, 3c form pipe joint, thus compare with the device in the past of the pipe joint that uses brazen miscellaneous part, can be to seek the lightness of pipe joint.And then the lightness of seeking heat exchanger, adopting the water heater of this heat exchanger is favourable to being arranged on the dwelling house wall.And, can solve in the device in the past pipe joint of soldering and take off phenomenons such as undercapacity, surface roughness that plumbous phenomenon causes are bad, outward appearance is bad, thereby can prevent the quality condition of poor.

When making heat exchanger, on

pipe

3a, 3c, pipe joint is set in advance, pipe 3a～3c is installed on many pieces of fins 6 and the body housing 2, many solders are placed in installation position according to these pipes 3a～3c, constitute the heat exchange sub-assembly, it is contained in carries out heat treated in the soldering oven afterwards, all soldering is implemented at the soldering position simultaneously, thereby can simplify heat exchanger 1 manufacture method, reduce manufacturing cost, and, can advance the automation of the manufacturing line of heat exchanger 1.

Below, the alter mode of declaratives change present embodiment.

1) use screw is connected described pipe joint 7 with the pipe joint of outside pipe arrangement occasion. also can on the flange part body 10a of flange component 10, form screw.In addition, the material of pipe 5 also has the employing copper situation of metal in addition, in the sort of occasion, also can save flange component 10, constitutes pipe joint with expansion tube department and flange part.

2) flange component 10 constitutes with the also available roughly same external diameter of flange part 9.In addition, in not breaking away from the scope that ancestor of the present invention refers to, also can implement the mode of the additional all changes of described embodiment.

Claims

1. heat exchanger, it is the fin tube type heat exchanger that possesses many pieces of fins and pipe, it is characterized in that, form in the end of described pipe through punch process and the expansion tube department of expander and the flange part integrally formed with this expansion tube department end, expansion tube department constitutes the pipe joint that pipe is connected usefulness with outside pipe arrangement with flange part.

2. heat exchanger, it is the fin tube type heat exchanger that possesses many pieces of fins and pipe, it is characterized in that, form in the end of described pipe through punch process and the expansion tube department of expander and the flange part integrally formed with this expansion tube department end, and be provided with that the outside is entrenched on the expansion tube department and with the flange component of body in addition that flange part is close to, constitute the pipe joint that pipe is connected usefulness with outside pipe arrangement by expansion tube department, flange part, flange component.

3. the manufacture method of a heat exchanger, it is the method that claim 1 or 2 described heat exchangers are made, it is characterized in that, many pipes and many pieces of fins that comprise the pipe that constitutes described pipe joint and whole solderings position of accommodating the body housing of these fins are carried out furnace brazing.