CN2347113Y

CN2347113Y - Standard heat utilizing water heating cylinder

Info

Publication number: CN2347113Y
Application number: CN 98228157
Authority: CN
Inventors: 张竞生
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-17
Filing date: 1998-06-17
Publication date: 1999-11-03
Anticipated expiration: 2008-06-17

Abstract

The utility model discloses a secondary heat utilizing water heating cylinder, which is mainly used for directly-heated gas water heater. The utility model is composed of a burning chamber, a heat exchanger, a secondary heating pipe, and a fume exhaust cavity, wherein, the secondary heating pipe is directly heated in the outer flame zone in the burning chamber, and thereafter, the heat exchanger is heated by waste heat; cold water firstly flows into the heat exchanger to exchange heat with the waste heat, and secondly into the secondary heating pipe to exchange heat in the high temperature zone of the outer flame of gas. The utility model has the advantages of high heat utility ratio and fast water temperature increase, and furthermore, the utility model is the main assembly of mass storage water heaters.

Description

Secondary heat utilization water heating cylindrical shell

The utility model relates to a kind of hot-water heating system, and it is applicable to the directly-heated type gas heater.

Water heating cylindrical shell is one of significant components of directly-heated type gas heater.Existing water heating cylindrical shell is made up of combustion chamber, heat exchanger, smoke extraction chamber and economizer bank, its structure tubular that is rectangle.The combustion chamber is a rectangular cylinder that is surrounded by sheet iron, and combustion gas is in the rectangular cylinder internal combustion.The top of combustion chamber is a heat exchanger.Heat exchanger is to curve many folding coiled pipes with heat conduction good metal pipe, is close to the surface of coiled pipe and has assigned a row metal heat absorbing sheet, and heat absorbing sheet is arranged very close, and its effect is the heating surface area that increases coiled pipe, strengthens the heat absorption effect.The top of heat exchanger is a smoke extraction chamber.Smoke extraction chamber also is a rectangular cylinder that is surrounded by sheet iron, and its top is airtight, leaves an exhaust smoke hole.Economizer bank is coiled in the outside of combustion chamber, and an end is communicated with heat exchanger, and an end is as cold water inlet, and the other end of heat exchanger is as hot water outlet.The heat exchange principle of this hot-water heating system is: combustion gas produces scorching hot air in the combustion chamber internal combustion, scorching hot air heats simultaneously to the wall of combustion chamber and the heat absorbing sheet of heat exchanger, cold water tray is around baffling repeatedly in heat exchanger again behind the combustion chamber, through carrying out heat exchange the temperature of cold water is raise with combustion chamber wall and heat absorbing sheet, the temperature of scorching hot air reduces, the air that reduces temperature collects in smoke extraction chamber, discharges from exhaust smoke hole.The shortcoming of this hot-water heating system is that structure is owed rationally, makes heat utilization efficiency not high.At first, the flame envelope high-temperature area that it does not make full use of in combustion gas carries out heat exchange, but adopt air heat, again by the hot air heat absorbing sheet, because hot-air has carried all heat energy of fuel gas buring, temperature is very high, still has a large amount of heat energy to have little time to be absorbed by heat absorbing sheet after by heat absorbing sheet; Secondly, the heat exchange action of economizer bank is little: economizer bank is coiled in the outside, combustion chamber very appropriately, just be not easy to obtain the assurance of technology originally, it is appropriate promptly to enable to accomplish to coil, also just linear between the two contact.Therefore, the heat energy efficiency of economizer bank absorption combustion chamber wall is not high; And, because the existence of economizer bank, make to be not easy to the surface irregularity of combustion chamber heat insulation covering is carried out on its surface, so that reduce thermal radiation loss.

Task of the present utility model is to provide a kind of hot-water heating system, and it can solve the above weak point of existing hot-water heating system, improves the heat utilization efficiency of combustion gas.

The utility model is realized as follows: surround rectangular cylinder as the combustion chamber with sheet iron, roll over helix tube in burning indoor horizontal installation layer of metal is divided into the combustion chamber two-layer as the post bake pipe more, the top of the combustion chamber heat exchanger of ining succession, heat exchanger and post bake pipe are serially connected.Another port of heat exchanger is as the inlet of cold water source, and another port of post bake pipe is as hot water outlet.The top of heat exchanger is the smoke extraction chamber that is surrounded by iron sheet.The process that this device carries out heat exchange is: combustion gas is in the combustion chamber internal combustion, and directly to the heating of post bake pipe, most heat energy are absorbed flame, and the heat energy of remainder carries out heat exchange with hot air exhausted and heat exchanger again.At this moment, heat energy that hot-air is with is few, and heat exchanger is connected on cold water again and flows into end, makes after the heat exchange this time in the air remaining heat energy just still less.By above heat exchanging process as can be seen: cold water enters heat exchanger, and the waste heat air-flow heating on upper strata, at first burned chamber enters the post bake pipe again and heated for the second time in the flame envelope district of combustion gas, twice heating, and it is a lot of that water temperature is improved; From the heat utilization angle, heat exchange has for the first time been carried out in combustion gas in the highest flame envelope district of temperature, and residue heat energy carries out the heat exchange second time at cold water zones again, and the environment of twice heat exchange all helps current and absorbs heat energy, and therefore, heat utilization efficiency also is very high.And, economizer bank no longer is set outside the combustion chamber, this has not only simplified production technology but also guaranteed that the outer surface of combustion chamber is smooth, makes that the surface coverage thermal insulation layer becomes possibility outside.

Below with reference to accompanying drawing the utility model is described in further detail.

Fig. 1 is the three-dimensional structure diagram of the utility model design.

Fig. 2 is Figure 1A-A cutaway view along the line.

With reference to the accompanying drawings, a rectangular type bumer that is surrounded by iron sheet (3) wherein is equipped with a dish post bake pipe (4).Post bake pipe (4) is rolled over around forming by rotary orientation by copper pipe, and folding is around locating to be arc (5), and non-folding is around locating to be straight tube (6).Straight tube (6) is two-layer about being arranged in parallel within and forming in two planes, and lower floor is than the upper strata row's of manying straight-run of pipe (6).Two-layer straight tube (6) be staggeredly located (with reference to figure 2) be isosceles triangle and distribute, this arrangement mode helps gas flame and fully surrounds straight tube (6).The arrangement mode of straight tube (6) has determined that the number of straight tube (6) can only be an odd number, and this makes that the termination of post bake pipe (4) must be that each is towards a side.The top of combustion chamber (3) heat exchanger (2) of ining succession.Heat exchanger (2) is bent back and forth by a copper pipe and is snakelike, is called coiled pipe (7).The surperficial dense metal heat absorbing sheet (8) that is installed with of being close to coiled pipe (7).The straightway of coiled pipe (7) can be got odd number, also can get even numbers.If get odd number, two terminations of coiled pipe (7) then towards just in time opposite, with (the back side among the figure that is connected with a termination of equidirectional post bake pipe (4), one of them termination, do not draw), and another two terminations towards (positive among the figure) are curved down, respectively as water inlet pipe (9) and outlet pipe (10); If the straightway number of coiled pipe (7) is got even numbers, then two terminations same towards, when post bake pipe (4) with a termination with after a termination of coiled pipe (7) is connected in the same way, separately another remaining termination will be distributed in the both sides of combustion chamber (3), that is to say that this frame mode produced the be placed in kind of both sides, combustion chamber (3) of water inlet pipe (9) and outlet pipe (10), all the structure of (3) same side has certain difference in the combustion chamber for it and water inlet pipe (9) and outlet pipe (10).Two kinds of different structures go for the water heater of different configurations.The top of heat exchanger (2) smoke extraction chamber (1) of ining succession.Smoke extraction chamber (1) is to be made of face of rectangular cylinder and sealing top that an iron sheet surrounds.There is a circular exhaust smoke hole (12) in the central authorities of that face of top, and exhaust smoke hole (12) has an annular edge along (11), is used for being connected with flue tube.

During use, cold water enters coiled pipe (7) by water inlet pipe (9), enters post bake pipe (4) again, spirals after a lot of bother, is flowed out by outlet pipe (10); Simultaneously, combustion gas is (3) below burning in the combustion chamber, and flame directes reach post bake pipe (4), and fuel gas flow passes from the gap of two row straight tubes (6) and forms eddy current and surround straight tube (6), carries out heat exchange with current in the straight tube (6); Thermal current after the heat exchange continues to rise, and passes heat absorbing sheet (8), and heat absorbing sheet (8) absorbs heat energy and coiled pipe (7) is given in conduction, carries out heat exchange with cold water current in the coiled pipe (7); Air-flow after the heat exchange collects in smoke extraction chamber (1) and is discharged by exhaust smoke hole (12).

Claims

1. a secondary heat utilization water heating cylindrical shell of being made up of smoke extraction chamber (1), heat exchanger (2) and combustion chamber (3) is characterized in that also having in the combustion chamber (3) a dish post bake pipe (4).

2. secondary heat utilization water heating cylindrical shell according to claim 1, it is characterized in that post bake pipe (4) is to be rolled over around forming by the spiral mode of curling up by copper pipe, folding is around locating to be arc (5), non-folding is around locating to be straight tube (6), straight tube (6) is two-layer about being arranged in parallel within and forming in two planes, straight-run of pipe (6) manys than the upper strata in lower floor, and two-layer straight tube is straggly evenly, becomes isosceles triangle to distribute.

3. secondary heat utilization water heating cylindrical shell according to claim 1 is characterized in that heat exchanger (2) is to make coiled pipe (7) by copper pipe, is close to the surface of coiled pipe (7) metal heat absorbing sheet (8) formation is installed.

4. according to claim 1,2 or 3 described secondary heat utilization water heating cylindrical shells, it is characterized in that post bake pipe (4) and coiled pipe (7) in the combustion chamber (3) the same side each be connected with a termination, and another termination is separately bent down respectively as water inlet pipe (9) and outlet pipe (10), water inlet pipe (9) and outlet pipe (10) can be in the combustion chamber same side of (3), also can be respectively in two sides of combustion chamber (3).

5. secondary heat utilization water heating cylindrical shell according to claim 1 is characterized in that smoke extraction chamber (1) is to surround face of rectangular cylinder and sealing top by iron sheet, and there is the circular exhaust smoke hole (12) at a band shape edge (11) in the central authorities of sealing surface.

6. secondary heat utilization water heating cylindrical shell according to claim 1 is characterized in that combustion chamber (3) is the rectangular cylinder that is surrounded by iron sheet.