CN2220040Y

CN2220040Y - Trapezoidal plug-in sheet heat-exchaging volumetric gas-fired water heater

Info

Publication number: CN2220040Y
Application number: CN 95201115
Authority: CN
Inventors: 李文田; 杜膺
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 1995-01-26
Filing date: 1995-01-26
Publication date: 1996-02-14
Anticipated expiration: 2005-01-26

Abstract

The utility model relates to a trapezoidal plug-in sheet heat-exchanging volumetric gas-fired water heater. The gas-fired water heater is composed of a combustion chamber, a heat-exchanging segment and a smoke discharging hood. The utility model is characterized in that a trapezoidal flue gas pipe is adopted by the heat-exchanging segment, and a heat transferring plug-in sheets inserted in the flue gas pipe also presents a trapezoid shape. The utility model has the characteristics of easy machining, small size, steel material saving, and high heat transferring efficiency. The utility model is mainly used for supplying heat to living rooms in winter, can supply hot water for washing, bathing in a tub, can be used for drying clothes, etc.

Description

Trapezoidal inserted sheet heat exchange type displacement type gas heater

The utility model belongs to the improvement of gas heater,

" inserted sheet heat exchange type single household gas and hot water heating heat source machine, the ZL87208377.2 " that the inventor is designed appears on the market for many years, is subjected to users' welcome deeply, and particularly its heat transfer efficiency height consumes the favorable comment that characteristics such as gas is few have obtained the user.Meanwhile, through for many years use practice, also this product is done further improvement and optimal design provides reliable basis for us.Have now found that the rectangle fume pipe that this heat source machine adopts and insert rectangle heat exchanger fin in fume pipe, its weak point is: one, inserted sheet is placed, and the fume pipe lower end need add support strip, and this brings certain difficulty for making work; Two, the radiating surface of inserted sheet contacts with the fume pipe inwall and is not very driving fit, so heat-transfer effect is not very good, the leeway of taping the latent power in addition and improving; Three, rectangle fume pipe and shell reach and go up the retaining chamber that lower plate is constituted, and volume equates up and down, is unfavorable for that water circulates in chamber.

Above-mentioned weak point at existing rectangle inserted sheet heat exchange type gas hot water heating heat source machine, the purpose of this utility model is to provide a kind of trapezoidal inserted sheet heat exchange type displacement type gas heater, it is little that this water heater has a volume, save steel, the characteristics that the thermal efficiency is high can be used for heating and life hot water.

For achieving the above object, the utility model is realized by following proposal.In the casing of a metal shell, its underpart is the combustion chamber that burner hearth constituted by burnt gas valve, Gas Pipe, burner and certain space.Be heat exchanging segment on the combustion chamber, it is to be reached by fume pipe outer surface and housing to go up the chamber body that lower plate constitutes, and has put the metal insert of augmentation of heat transfer in fume pipe, is water in the chamber, flue gas after the burning of passing through in the fume pipe to rise.It on the heat exchanging segment enclosure, Gou Zao inserted sheet heat exchange type displacement type gas heater like this, it is characterized in that, the longitudinal cross-section of its fume pipe is an isosceles trapezoid, its gradient is 0.5: 100-2.5: 100, be placed on the inserted sheet in the fume pipe, its fore-and-aft plane also is the isosceles trapezoid shape, and its gradient equates with the fume pipe gradient.Fig. 1 is a structural representation of the present utility model.Fig. 2 is the front view of a kind inserted sheet.Fig. 3 is the vertical view of Fig. 2.Fig. 4 is the front view of b kind inserted sheet.Fig. 5 is the vertical view of Fig. 4.In the drawings, 1 is flame-observing hole, and 2 are the combustion gas inlet pipe, 3 is burnt gas valve, and 4 is burner, and 5 is burner hearth, 6 is fume pipe, and 7 are the heat transfer inserted sheet, and 8 is hot water outlet, 9 is enclosure, and 10 is water return outlet, and 11 is a inserted sheet heat-absorbent surface, be a inserted sheet heat-transfer area, 13 is the spacing double wedge, and 14 is b inserted sheet heat-absorbent surface, 15 is b inserted sheet heat-transfer area, and 16 is the spacing face.

Below in conjunction with accompanying drawing to one of structure of the present utility model and uses thereof-provide the process of hot water heating to be described further.Combustion gas is flowed through to install from Gas Pipe 2 and is had auto extinguishing protection valve; burn on burner in the igniting back; combustion flame directly heats the bottom and the burner hearth of heat exchanging segment; water in the heat exchanging segment chamber is heated; the combustion product gases that contains a large amount of waste heats; rise and pass fume pipe; a large amount of heats are absorbed by the inserted sheet heat-absorbent surface in the fume pipe, and pass to the fume pipe tube wall by its heat-transfer area, and the water in the chamber further obtains heating; hot water is through outlet and pipeline; remove fin through heating system again, the water of heat radiation back cooling is back to again in the heat exchanging segment chamber, is heated again; so constantly circulation can reach room hot water heating purpose.Fume pipe quantity of the present utility model, according to the decision of thermic load size, the fume pipe height is 200-300mm, be inserted with heat transfer inserted sheet 10-20 sheet in each fume pipe, because fume pipe and inserted sheet all are to be the isosceles trapezoid shape, the heat-transfer area of inserted sheet contacts with the fume pipe inner surface very and fits, and its thermal resistance is minimum, so have high heat transfer efficiency.

The utility model is compared with existing gas and hot water heating heat source machine, not only has the processing system Make easily, dismounting clears up easily characteristics, but also have volume little, save the steel advantage, In the situation of same volume, heat exchange efficiency can improve 10-20%.

The utility model not only can be used for warming, also can provide hot water, is used for laundry and bath Basin is had a bath, and also can be used for drying clothes etc.

Claims

1, a kind of trapezoidal inserted sheet heat exchange type displacement type gas heater, be in the casing that a metal shell constitutes, below it be one by Gas Pipe, burnt gas valve, the combustion chamber that burner hearth constituted of burner and certain space, on this chamber be one by housing and fume pipe outer wall and go up the heat exchanging segment that lower connecting plate is constituted, and in fume pipe, be inserted with metal insert, it on the heat exchanging segment enclosure, Gou Zao gas heater like this, it is characterized in that: the longitudinal profile of fume pipe is the isosceles trapezoid shape, its gradient is 0.5: 100-2.5: 100, be inserted in the inserted sheet in the fume pipe, its fore-and-aft plane also is the isosceles trapezoid shape, and its gradient equates with the fume pipe gradient.