CN2066965U

CN2066965U - Chimney jacket heat-exchanger

Info

Publication number: CN2066965U
Application number: CN 90213880
Authority: CN
Inventors: 高常宝
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-05-29
Filing date: 1990-05-29
Publication date: 1990-12-05

Abstract

The utility model relates to a chimney water jacket heat exchanger, which is characterized in that inside ribbed aluminium tubes are taken as the inner wall of a chimney namely a water jacket, heat exchange area between the inside ribbed aluminium tubes and fume is enlarged, and shaft center part of an inside ribbed chimney is provided with a central tube having the same height with the chimney, a closed lower end, light weight and high temperature resistance; fume can only flow along the wall surface of the chimney and ribs to enhance the heating action on the wall of the chimney, and one side having minor heat transfer coefficient of fluid heat exchange systems at both sides of a metallic wall surface is intensified. The heat exchanger has the advantages which are peculiar to aluminium sections, such as regular molding, high thermal conductivity, small specific gravity, corrosion resistance, etc. The chimney water jacket heat exchanger can be widely used for various water heaters effectively utilizing flame smoke.

Description

Chimney jacket heat-exchanger

The design is a kind of technological improvement of chimney type water jacket heat exchanger.

The intercalated water sleeve that present pandemic water jacket heat exchanger of chimney, the thin-wall metal pipe that is promptly overlapped by two axial lines constitute is arranged on such as the heat exchange main body on the heater of polytype water such as service water radiator.Mistake is strengthened inadequately to the heat effect of chimney wall owing to the axle center part that heat exchange area is little, flue gas is worn chimney of high-temperature flue gas and chimney wall, thereby heat transfer rate is slow, the thermal efficiency is low, the heat exchange effect remains to be improved.

By the thermal conduction study basic theories as can be known, the heat transfer of the differential temperature fluid of metal wall two sides should be strengthened the less side of exothermic coefficient (" thermal conduction study basis " chapter 6 of visible inscription on pottery select chief editor is described) emphatically.The design is the inner layer wall of water jacket as chimney with the inner rib aluminum type tube of extrusion modling, enlarged area with flue gas heat exchange, and place the thin-wall circular tube of a lower end closed as core pipe at the axle center part of internal-rib chimney, make the flue gas can only be along flowing between chimney wall and fin, thereby strengthened the Convective Heating of chimney wall and the effect of radiation heating.

The design's heat exchanger and combine with gas burner 8, combustion chamber 7 etc. and the gas water heater formed has following characteristics:

(1), throat less chamber 7 is thin wall iron spares, is shaped on the sole E of two symmetries on its outer wall, respectively is shaped on circular hole H1 on the E, in order to 7 bolts knot is fixed on the external wallboard; The bottom of 7 cylindrical wall is shaped on several uniform through hole H2, as the fire hole and the secondary intake opening of combustion gas; The Outer cylindrical wall N at the interior cylindrical wall M at 7 upper port place and the lower port place of internal-rib chimney 1 is close-fitting mutually; The top of 7 interior cylindrical wall is shaped on several uniform rib K, the support 6 thereby outer wall of the lower end dome head of the radial extremity of K and core pipe 6 matches; Be shaped on uniform screwed hole H4 on 7 the lower surface, with bolt knot gas burner 8.

(2), the inner layer wall of water jacket heat exchanger is that chimney 1 is the inner rib aluminum type tube of extrusion modling, promptly on 1 interior cylindrical wall, be shaped on some equally distributed, with tube wall be the longitudinal fin J of one, the quantity of J sheet and the design of radial height should take into account the high temperature that extrusion process and fin can directly be subjected to flue gas under heat transfer boundary condition; The outer wall of chimney water jacket is that Thin-walled Aluminum pipe 2 is shorter than 1 slightly, and overlaps with 1 axial line, its internal diameter be a bit larger tham 1 external diameter, two-port a little undergauge, be welded on the outer wall at 1 two-port place, the gap that forms enclosed shape is water cavity G; Bottom 2, top respectively are shaped on a circular hole, weld admitting pipe joint 3 and titting water outlet 4 respectively; Be shaped on the auxiliary fixedly ear 5 of symmetry on 2 the outer wall.

(3), place at the axle center part of internal-rib chimney 1 that its external diameter f is slightly smaller than the radial spacing d of J sheet, vertically is same as 1 highly approximately, the thin-wall circular tube of lower end closed, light body, high temperature resistant (below 900 ℃) is as core pipe 6; The making material of 6 economy can be the thin-walled iron pipe, make its have smooth can reflecting heat outside cylinder shape wall, this wall and 1 internal face and some fin J constitute the space Y that flue gas vertically flows, the summation of Y space sectional area should satisfy the requirement of flue gas flow; 6 upper end is circular disk P, and its central small hole H3 is as the overfolw hole of thermal expansion gas; 6 lower end is dome head Q, and the radial extremity of its outer wall and 7 K muscle sheet matches; Thereby make 6 to be located on 7.

The operation principle of the above-mentioned gas water heater of being made up of the design's heat exchanger is: fuel gas and air enter burner 8, overflow in the combustion chamber 7 after mix in the footpath, lighted by the kindling material that enters by the H2 hole, secondary air is also poured in by the H2 hole, to promote abundant burning; Because 6 lower end seal, high-temperature flue gas can only vertically flow along between the internal face of internal-rib chimney 1 and fin J, thereby to the stronger Convective Heating of chimney wall generation and the effect of radiation heating, and the common round chimney 9 of waste gas through 1 upper end enters flue; Meanwhile, cold water or follow backwater and enter water cavity G through pipe joint 3 is heated the back and goes into hot-water line by titting water outlet 4 and flow to required part.Because the design's heat exchanger has internal-rib and SMIS binomial feature, make high-temperature flue gas and chimney wall that bigger heat exchange area be arranged and the chimney wall is produced stronger convection current and radiation heating effect, thereby strengthened the less side of exothermic coefficient in metal wall two side flue gases and the water heat-exchange system, thereby can improve the thermal efficiency significantly, improve the heat exchange effect; The design brought into play also that aluminum extrusion process maturation, moulding rule, wall are thin evenly, thermal conductivity is high, proportion is little, corrosion-resistant, welding performance is better, the strong and unyielding comprehensive advantage such as hold concurrently mutually of mechanical performance, for the correct aluminium section bar that uses has been opened up new approach.

Because the design's heat exchanger structure is light and handy, manufacture craft is easy, cost is lower, can be widely used in the water heater such as polytype combustion gas such as service water radiator, hot bath or shower's device, combustion coal; If, can form simple and easy " boiler " of hot-water supply in a large number with several in parallel uses of forming by the design's heat exchanger of water heater.

Accompanying drawing 1 be the design heat exchanger structural representation and by it etc. the structural representation of the gas heater formed, Fig. 2 is the A-A profile of Fig. 1, Fig. 3, Fig. 4 are the structure charts of internal-rib chimney 1, and Fig. 5, Fig. 6 are the structure charts of core pipe 6, and Fig. 7, Fig. 8 are the structure charts of combustion chamber 7.Among the figure:

1, the inner rib aluminum type tube chimney is the water jacket inner layer wall

2, water jacket outer wall pipe

3, admitting pipe joint

4, titting water outlet

5, auxiliary fixedly ear

6, SMIS pipe

7, combustion chamber

8, gas burner

9, common chimney

E, 7 fixedly sole

Support muscle sheet on K, 7 inwalls

The annular disk at P:6 upper port place

The dome head of Q:6 lower end

Bolt hole on the H1:E

The through hole of H2:7 cylindrical wall bottom

The centre bore of H3:6 upper end annular disk

Screwed hole on the lower surface of H4:7

G: water cavity

Fin on the J:1 inwall

Y: the space that flue gas vertically flows

Cylindrical wall in the M:7 upper port place

N:1 lower port place Outer cylindrical wall

The radial spacing of d:J sheet

The external diameter of f:6

Claims

A kind of chimney type water jacket heat exchanger is a Thin-walled Aluminum pipe 2 by the outer wall of water jacket, admitting pipe joint 3, and titting water outlet 4, fixing ear 5 compositions such as grade is characterized in that:

Inner rib aluminum type tube with extrusion modling is the inner layer wall 1 of water jacket as chimney, promptly on 1 interior cylindrical wall, be shaped on equally distributed, with tube wall be the longitudinal fin J of one;

Place at the axle center part of internal-rib chimney 1 that its external diameter f is slightly smaller than the radial spacing d of J sheet, vertically is same as 1 highly approximately, lower end closed, upper end have an aperture, light body, resistant to elevated temperatures thin-wall circular tube as core pipe 6, make 6 internal face and some fin J constitute the space Y that flue gas vertically flows with smooth Outer cylindrical wall, this wall and 1,1 and 6 the two lower ends can be seated on the same burner, and flue gas can only be flowed along rising on the Y space;

Water jacket outer wall 2 is shorter than 1 slightly, its internal diameter is a bit larger tham 1 external diameter, its axial line overlaps with 1 axial line, its two port a little undergauge, to be welded on the outer wall of 1 two ports, to constitute the enclosed shape gap be water cavity G, 2 bottom and top respectively are shaped on a circular hole, weld admitting pipe joint 3 and titting water outlet 4 respectively.