CN2280871Y

CN2280871Y - Gas heat-exchanger

Info

Publication number: CN2280871Y
Application number: CN 96212867
Authority: CN
Inventors: 姜杰
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-28
Filing date: 1996-05-28
Publication date: 1998-05-06
Anticipated expiration: 2006-05-28

Abstract

The utility model relates to a new gas heat exchanger. The utility model adopts heat exchanging bodies with different steps and new fin pipes to exchange heat, has the advantages of high thermal efficiency, reasonable proportion of heat exchanging area, simple structure, low cost, energy saving and wide application, and can be widely used for different types of small gas heat exchangers.

Description

The combustion gas heat exchanger

The utility model belongs to interchangeable heat exchange or heat-transfer equipment.

Various gas heaters at home and abroad all are widely used, and the trend of oriented from now on multipurpose, multi-functional development.But all there is many-sided deficiency in present various water heater in order to reach the purpose that makes water be raised to higher temperature in the short period of time on the efficient of heat exchange.

The purpose of this utility model mainly is the heat exchange structure form that changes traditional water heater, particularly design exclusive aluminium type heat-exchange fin pipe, it has increased heat exchange area, rationally solved the ratio of a heat exchange and secondary heat exchange area, made the heat energy of combustion gas and water that heat exchange quite fully be arranged.

The cross section of finned tube of the present utility model as shown in Figures 1 and 2, the shape of its pipe can be according to the external form of water heater and the demand of heat exchange amount, it can be (the diameter 12～20mm) of circle, it also can be the square or rectangular (length of side 12～80mm), and the pitch of fins of the general cross section of inside and outside fin is 4～8mm, about high 3～8mm, fin has certain gradient from the root to the point, the thickness of fin should approach a bit as far as possible, when length of a film, can suitably increase thickness, but the thickness of root should not surpass 2.5mm.Fin exists manages outside interior and the pipe.The quantity of the finned tube of each heat exchanger is decided according to required heat exchange amount, and general minimum is 3, does not limit at most.Finned tube is the aluminium section bar pipe of drawing, and thickness of pipe wall is 1.2～2mm, and fin and body unite two into one.

The cross section of heat exchanger such as Fig. 3 and Fig. 4, the urceolus of heat exchanger can be done circular or square according to the demand of each side, and the finned tube layout in it should be uniform sequential, and each finned tube spacing is good with 2～4mm, and the quantity of finned tube is determined according to heat exchange amount size.In addition, according to the temperature and the quantity design ladder heat exchange mode of the required heat supply water of the utility model, see accompanying drawing 5, accompanying drawing 6 and accompanying drawing 7, ladder can be by single-stage to three grade (or higher), the big more recovery that helps waste heat more of progression, and heat transfer rate is high more energy-conservation more.And the total height of heat exchanger is what of a tree name ladder come to determine that the height of general single-stage is 200～350mm according to, and above every grade the height of secondary is between 80～150mm.

The utility model is owing to changed the heat exchange structure form of traditional water heater, particularly exclusive aluminium section bar heat-exchange fin pipe, increased heat exchange area, reasonably solved the ratio of a heat exchange and secondary heat exchange area, made the heat energy of combustion gas and water that heat exchange quite fully be arranged; Because finned tube is the aluminium section bar pipe of drawing, its intensity height, easily manufactured, and fin and body unite two into one, and thoroughly solved the thermal resistance problem of general sheet string type finned tube, reaches quite high heat exchange efficiency; If being applied in, this combustion gas heat exchanger can save coal gas on the civilian gas heater more than 10%, if be applied in the small size hot-water boiler of junior unit heating system then can save fuel gas more than 7%, and be applied on other heat exchanger also energy savings in a large number.

The utility model drawings attached 7 width of cloth, wherein Fig. 1 and Fig. 2 are the sectional view of finned tube, and Fig. 3 and Fig. 4 are the sectional view of heat exchanger, and Fig. 5, Fig. 6 and Fig. 7 are the ladder heat exchange mode figure of heat exchanger.

Claims

1. one kind is the combustion gas heat exchanger of main heat exchange element with finned tube, it is characterized in that it is made of finned tube and heat exchanger, finned tube can be round, its diameter is 12～20mm, it also can be square or rectangular, its length of side is 12～80mm, the pitch of fins of fin cross section is generally 4-8mm, high 3～8mm, fin have certain gradient from the root to the point, but the thickness of root should not surpass 2.5mm, and fin exists manages outside interior and the pipe, and the quantity of the finned tube of each heat exchanger is decided according to required heat exchange amount, and general minimum is 3 or more, and finned tube is the aluminium section bar pipe of drawing, pipe thickness is 1.2～2mm, fin and body unite two into one, and the urceolus of heat exchanger can be done circular or square, and its internally finned tube spacing is 2-4mm.