CN202501624U

CN202501624U - An inverted V-shaped structure condensing heat exchanger for gas water heaters

Info

Publication number: CN202501624U
Application number: CN201120424490XU
Authority: CN
Inventors: 余少言; 仇明贵; 邓海燕; 刘兵; 向熹
Original assignee: Guangdong Macro Gas Appliance Co Ltd
Current assignee: Guangdong Macro Gas Appliance Co Ltd
Priority date: 2011-10-31
Filing date: 2011-10-31
Publication date: 2012-10-24
Anticipated expiration: 2021-10-31

Abstract

The utility model discloses a condensing heat exchanger with an inverted-V-shaped structure for a gas water heater. The condensing heat exchanger is characterized in that the condensing heat exchanger comprises a smoke collecting hood, wherein a condenser box is arranged above the smoke collecting hood through a condenser bracket; a smoke inlet is arranged in the middle position of the bottom of the condenser box; a symmetrical corrugated pipe array and an inverted-V-shaped baffle plate are sequentially arranged between the bottom of the condenser box and a condenser cover with a smoke exhaust opening; and a condensed water outlet is arranged in a low position of the bottom of the condenser box. When the condensing heat exchanger works, due to the blocking function of the inverted-V-shaped baffle plate, flue gas flows backwards in two ways and enters the parallel corrugated array pipe area, and inverted-V-shaped forced convection heat transfer is formed, so that the temperature of the flue gas is reduced and the flue gas is collected on the two sides of the inverted-V-shaped baffle plate and then exhausted via the smoke exhaust opening; and the flue gas flowing path is in a double-inclined-Z-shaped curve, and the heat transfer efficiency is high. The condensing heat exchanger has the advantages of compact structure, simplicity, practicality, energy conservation, material conservation and relative low cost, and condensed water cannot be produced on a main heat exchanger.

Description

A kind of inverted V-shaped structure condensing heat exchanger that is used for gas heater

Technical field

The utility model relates to a kind of condensing heat exchanger, relates in particular to a kind of inverted V-shaped structure condensing heat exchanger that is used for gas heater.

Background technology

To containing a large amount of latent heat in the traditional gas heater institute smoke discharging, people carry out the latent heat recycling through the whole bag of tricks, and it is exactly wherein a kind of wherein using condensed type combustion gas water heater.

Condensed type combustion gas water heater generally is to carry out the temperature that twice heat exchange reduces flue gas through two groups of heat-exchange systems; To reach the thermal efficiency purpose that improves water heater, the condensing heat exchanger of gas heater mainly adopts fin and tube type heat exchange and pipe type heat transfer in the prior art.The high-temperature flue gas that fuel gas buring produces after the main heat exchanger heat exchange, when getting into condensing heat exchanger temperature still more than 100 ℃, in condensing heat exchanger, directly carry out secondary heat exchange with bellows or fin after; Though temperature significantly reduces, without the process of a path changing, flue gas always selects the less place of resistance directly to pass through; Cause flue gas only with carry out the local heat exchange of bellows or fin, cause heat exchange insufficient, the condensing heat exchanger exhaust gas temperature still is higher than normal temperature far away; About about 75 ℃; Waste heat in the flue gas does not fully reclaim, so heat exchange efficiency is low, and the thermal efficiency is still waiting to improve.

And fin and tube type condensing heat exchanger manufacturing process is complicated, and cost is higher, and perishable.Pipe type heat transfer adopts bellows, is arranged in the left side or the right side of water heater main body, and the smoke evacuation resistance is bigger, and main heat exchanger is prone to produce condensed water, and the water heater internals is damaged, and the overall structure volume is bigger simultaneously.

For overcoming above-mentioned defective, study through flue gas flow direction, and the structure of condensing heat exchanger is carried out new research and development, design condensed type combustion gas water heater.

The utility model content

Common condensed type combustion gas water heater exhaust gas temperature is higher relatively in order to overcome, main heat exchanger be prone to produce condensed water, manufacturing process is complicated, cost is higher and perishable, problem such as the overall structure volume is bigger, the utility model provides the new technical scheme that addresses these problems.

A kind of inverted V-shaped structure condensing heat exchanger that is used for gas heater is characterized in that: comprise an exhaust fume collecting hood, the condenser box is arranged on the exhaust fume collecting hood top through condenser brackets, does not directly contact at the bottom of the condenser box with between the exhaust fume collecting hood; Advance mouth and be arranged on centre position at the bottom of the condenser box, link to each other with the opening coupling on exhaust fume collecting hood top; Above the bellows array that bellows is formed is arranged at the bottom of the condenser box; The inverted V-shaped deflection plate is arranged on bellows array top; Condenser cover is arranged on condenser box top, and bellows array and inverted V-shaped deflection plate are covered in the condenser box, and exhaust opening is arranged on the condenser cover; Condensation-water drain is provided with lower at the bottom of the condenser box.

Further improvement as the utility model; The both sides of said inverted V-shaped deflection plate form the angle of certain angle; And two edges bend downwards with certain length and angle, and are upwards straight-through to stop flue gas, force flue gas changed course both sides adverse current; Promote that the condensing heat exchanger heat exchange is more even, heat exchange efficiency is higher; Leave the passage of dying between the inwall of bending part and condenser box, let the flue gas behind the secondary heat exchange pass through.

As the further improvement of the utility model, the inverted V-shaped deflection plate is preferably stainless steel material and processes, and strengthens antiseptic property.

As the further improvement of the utility model, both sides and inverted V-shaped deflection plate corresponding sides laterally arrange at the bottom of the said condenser box, and the flue gas in the favourable dimple array area under control evenly distributes, and also helps the collection of condensed water.

Further improvement as the utility model; Said exhaust fume collecting hood is low wide and up narrow " eight " font hatch frame; The angle that its top forms is during less than the angle of inverted V-shaped deflection plate; The flue gas that more helps the main heat exchanger top evenly distributes, and improves each heat exchange efficiency of fins, avoids sensible heat exchanger top condensed water to produce; Make that also to exist air layer to carry out at the bottom of exhaust fume collecting hood top and the condensation box heat insulation, prevent that exhaust fume collecting hood exhaust fume collecting hood top from producing condensed water owing to temperature is lower.Its open top width is preferably by the multiple of bellows diameter to be chosen, and bottom opening and main heat exchanger opening are complementary.The exhaust fume collecting hood two edges are provided with the bending of level, and condenser brackets is arranged at the bottom of bending part and the condenser box between the two edges, in order to support the condenser box; The main part of condenser brackets is less relatively, in order to avoid heat insulation between influencing at the bottom of exhaust fume collecting hood top and the condensation box.

As the further improvement of the utility model, the bellows array that said bellows is formed is arranged on into mouth areas at both sides for pressing certain vertical tube in the heart apart from the parallelly connected bellows fork row formula array pipe of arranging, and is that axial symmetry is arranged with respect to advancing mouth.One of its structure is: advancing mouth one side, below two parallelly connected water inlet pipes, from advance the mouth front side through snakelike around to advancing the mouth rear side; By certain level die spacing again wraparound enter the mouth front side; Unroll so repeatedly, in advancing mouth axisymmetric areas at both sides each symmetrically continuously around three row, and advancing the mouth opposite side; After distance is carried out parallel connection in the heart by vertical tube with the two parallelly connected outlet pipes that are positioned at its top; Two parallelly connected outlet pipes oppositely rap around to along two parallelly connected water inlet pipes above the starting point of two parallelly connected water inlet pipes, and the parallelly connected bellows that has formed four layers of three symmetrical row in condenser box areas at both sides is pitched row's formula array pipe, and each layer pipe line of centres in each zone is parallel to each other; And parallel with the inverted V-shaped deflection plate corresponding sides of top, parallelly connected bellows fork row formula array pipe is evenly distributed between condenser both sides and the inverted V-shaped deflection plate.Current get into along following two parallelly connected water inlet pipes, after snakelike parallel heat exchanging mixes, continue behind snakelike parallel heat exchanging through two top parallelly connected outlet pipes again, flow out to get into main heat exchanger, have realized parallel heat exchanging, have increased heat exchange area; Current repeatedly by the front side to rear side again to the front side, evenly distribution of cigarette temperature before and after having realized.This structure cooperates with the inverted V-shaped deflection plate, also helps to reduce overall volume, reduces production technology and reduces cost.

Further, parallelly connected bellows fork row formula array pipe at transversely arranged each layer horizontal tube in each zone in the heart apart from choosing by the multiple of bellows diameter.

The heat transfer process of said inverted V-shaped structure condensing heat exchanger is:

High-temperature flue gas is after the main heat exchanger heat exchange, and flue gas evenly distributes above main heat exchanger, in exhaust fume collecting hood, compiles, and gets into condensing heat exchanger; In condensing heat exchanger; Flue gas after advance mouth and get into condensing heat exchanger since exhaust fume collecting hood with advance mouth and form low wide and up narrow structure, air pressure increases; It is up to make that flue gas quickens; Stopped by the inverted V-shaped deflection plate because flue gas is upwards straight-through, the flue gas changed course divides the two-way adverse current to get into territory, parallelly connected dimple array area under control, forms the forced-convection heat transfer of inverted V-shaped; Because parallelly connected dimple array area under control domain space is relatively large, and the both sides shunting, after flue gas had arrived this zone, air pressure reduced, and flow velocity weakens; Because downward turning back arranged; Change the flue gas path, cause that gas approach place and smoke evacuation place pressure reduction are bigger, make flue gas evenly pass through bellows; Improve the bellows surface heat exchange area indirectly; Make flue gas and bellows heat exchange more abundant, thereby improve heat exchange efficiency, also strengthened the wind loading rating of water heater complete machine.

Fully after the heat exchange, flue-gas temperature reduces fast, and the steam in the flue gas is condensed into water after being reduced to dew point in condensing heat exchanger, drop on the condenser box at the bottom of lower position discharge from condensation-water drain, do not go in the main heat exchanger and can not be back to; At the bottom of the condenser box and between the exhaust fume collecting hood air heat-insulation layer is arranged, not directly contact each other, cold generation condensed water can not met in the main heat exchanger top yet; After low-temperature flue gas is collected from V-arrangement deflection plate both sides, flow out from the edge and the gap of the inward flange of housing of inverted V-shaped deflection plate, rise along inverted V-shaped deflection plate superjacent air space, collect in the discharge of exhaust opening place at last, the smooth and easy resistance of discharging fume is little.

In the whole process, the flue gas circulation path is symmetrical diclinic Z type curve, makes flue gas in limited space, prolong the discharging distance effectively.And, because the barrier effect of inverted V-shaped deflection plate, in territory, parallelly connected dimple array area under control; Flue gas flows from top to bottom, and the low tendency of turning back in this preceding high back helps the layering of flue gas; Make the flue gas of higher temperatures in the higher position heat exchange; The heat exchange in the lower of the flue gas of lower temperature makes water vapour reach dew point as much as possible in the lower, rear end and forms condensed water, avoided condensed water drop on temperature higher on bellows; Form moisture film and hinder the higher flue gas heat exchange of temperature, make heat transfer process carry out more fully.

In sum, the beneficial effect that brings of the utility model is:

1, the utility model compact overall structure, volume are little, simple and practical, and the inverted V-shaped deflection plate only needs plate stamping and welding just can accomplish production and installation, and technology is simple.With respect to the tubular type condensing heat exchanger, structure optimization is remarkable, helps entire machine design, under same energy-saving effect, avoids the consumption of a large amount of copper materials, greatly reduces cost.

2, adopt symmetrical diclinic Z type curve smoke evacuation, make fume emission smooth, strengthen degeneration-resistant wind energy power.And the layered effect of flue gas is good; Make parallelly connected bellows fork row formula array pipe can fully absorb the latent heat in the flue gas, improve heat exchange efficiency, through measuring; The flue-gas temperature of discharging is reduced to about 48 ℃; Far below 75 ℃ of common condensed type combustion gas water heater, the thermal efficiency reaches more than 103%, and energy-saving effect significantly improves.

3, main heat exchanger can not produce condensed water; And being condensed into water and can not being back to main heat exchanger in the condensing heat exchanger; Thereby protected the water heater internals can not receive the damage of water, and the inverted V-shaped deflection plate adopts stainless steel, further improved corrosion resistance.

In view of this, this inverted V-shaped structure condensing heat exchanger of the utility model can also be used for the gas-fired equipment or the device of similar structures, has promotional value.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment, the utility model and useful technique effect thereof are further elaborated, wherein:

Fig. 1 is the symmetrical diclinic Z type curvilinear flow path sketch map of flue gas in the inverted V-shaped structure condensing heat exchanger, and the arrow among the figure is represented the flow direction of flue gas.

Fig. 2 is the sectional drawing of inverted V-shaped structure condensing heat exchanger.

Fig. 3 is the parallelly connected bellows fork row formula array tubular construction stereogram of inverted V-shaped structure condensing heat exchanger, and arrow is represented water (flow) direction among the figure.

Fig. 4 is the main structure parameters sketch map of inverted V-shaped structure condensing heat exchanger.

Description of reference numerals:

10 be main heat exchanger, 11 at the bottom of the condenser box, 12 be condensing heat exchanger, 13 for condenser brackets, 21 for exhaust fume collecting hood, 180 for parallelly connected water inlet pipe, 181 are parallelly connected outlet pipe for condensation-water drain, 20 for advancing mouth, 18 for bellows, 19 for inverted V-shaped deflection plate, 17 for exhaust opening, 16 for condenser cover, 15 for condenser box, 14.

The specific embodiment

Referring to Fig. 1～Fig. 2; Condensing heat exchanger 12 is arranged on main heat exchanger 10 tops; It is characterized in that: comprise an exhaust fume collecting hood 21, condenser box 13 is arranged on exhaust fume collecting hood 21 tops through condenser brackets 20, at the bottom of the bottom condenser box of condenser box 13 11 with exhaust fume collecting hood 21 between directly do not contact; Advance mouth 17 and be arranged on 11 centre positions at the bottom of the condenser box, link to each other with the opening coupling on exhaust fume collecting hood 21 tops; The bellows array that bellows 18 is formed is arranged on 11 tops at the bottom of the condenser box; Inverted V-shaped deflection plate 16 is arranged on bellows array top; Condenser cover 14 is arranged on condenser box 13 tops; Bellows array and inverted V-shaped deflection plate 16 are covered in condenser box 13, and exhaust opening 15 is arranged on the condenser cover 14; Condensation-water drain 19 is provided with 11 lowers at the bottom of the condenser box.

Referring to Fig. 4; The angle that the both sides of said inverted V-shaped deflection plate 16 form is 120 °～170 °; Each bends downwards with certain angle and length with respect to inverted V-shaped deflection plate 16 in the two edges of inverted V-shaped deflection plate 16, with near bellows 18 semi-surroundings at inverted V-shaped deflection plate 16 edges.

Further, leave the passage of dying between the two edges bending part of inverted V-shaped deflection plate 16 and the inwall of condenser box 13, let the flue gas behind the secondary heat exchange pass through.

Further, the angle of the both sides of inverted V-shaped deflection plate formation is preferably 150 °; The bending length L is preferably identical with the bellows diameter d, and β is preferably 30 ° with respect to inverted V-shaped deflection plate bending angle.This moment, the condensing heat exchanger heat exchange was more even, and heat exchange efficiency is higher.

Preferably, said inverted V-shaped deflection plate 16 is processed by stainless steel material.

Referring to Fig. 4, preferably, 11 both sides and inverted V-shaped deflection plate 16 corresponding sides laterally arrange at the bottom of the said condenser box.

Referring to Fig. 2 and Fig. 4, preferably, said exhaust fume collecting hood 21 is low wide and up narrow " eight " font hatch frame, and the angle γ that its top forms is less than the angle of the both sides formation of inverted V-shaped deflection plate 16, and further angle γ is preferably 120 °.Its open top width W is preferably 2 times of diameter d of bellows 18, and bottom opening and main heat exchanger 10 openings are complementary.Exhaust fume collecting hood 21 two edges are provided with the bending of level, and condenser brackets 20 is arranged on bending part, exhaust fume collecting hood 21 through condenser brackets 20 with 11 be fixedly connected at the bottom of the condenser box.Because the main part of condenser brackets 20 is less relatively, can not influence at the bottom of exhaust fume collecting hood 21 tops and the condensation box heat insulation between 11.

Preferably, the parallelly connected bellows fork row formula array pipe of the bellows array that said bellows 18 is formed for arranging apart from H in the heart by certain vertical tube is arranged on into mouth 17 areas at both sides, arranges for axial symmetry with respect to advancing mouth 17.

Further, as shown in Figure 3, the structure optimization of said parallelly connected bellows fork row formula array pipe is: advancing mouth 17 1 sides; Below two parallelly connected water inlet pipes 180; From advance mouth 17 front sides through snakelike around to advancing mouth 17 rear sides, by certain level die space D again wraparound enter mouth 17 front sides, unroll so repeatedly; Axisymmetric areas at both sides is respectively symmetrically continuously around three row in advancing mouth 17; And advancing mouth 17 opposite sides, after the two parallelly connected outlet pipes 181 that are positioned at its top carried out parallel connection apart from H in the heart by vertical tube, two parallelly connected outlet pipes 181 oppositely rapped around to the starting point top of two parallelly connected water inlet pipes 180 along two parallelly connected water inlet pipes 180; Formed the parallelly connected bellows fork row formula array pipe of four layers of three symmetrical row in condenser box 13 areas at both sides; Each layer bellows 18 lines of centres in each zone are parallel to each other, and parallel with the inverted V-shaped deflection plate corresponding sides of top, make parallelly connected bellows fork row formula array pipe be evenly distributed on condenser 11 both sides.Current get into along following two parallelly connected water inlet pipes 180, after snakelike parallel heat exchanging mixes, continue behind snakelike parallel heat exchanging through two top parallelly connected outlet pipes 181 again, flow out to get into main heat exchanger 10, have realized parallel heat exchanging, have increased heat exchange area; Current repeatedly by the front side to rear side again to the front side, evenly distribution of cigarette temperature before and after having realized.

Further, as shown in Figure 4, said parallelly connected bellows fork row formula array pipe is 2 times of bellows diameter d apart from D at transversely arranged each layer horizontal tube in each zone in the heart; Vertical tube is preferably 1.5 times of bellows diameter d apart from H in the heart between each layer.

The utility model is not constituted any restriction according to above-mentioned specification and specific embodiment; The specific embodiment that discloses and describe above the utility model is not limited to; Some modifications and distortion to the utility model; Such as being replaced as shape such as semicircle, replacing measures such as bellows of inverted V-shaped deflection plate, also should fall in the protection domain of claim of the utility model with the pipe of other form.

Claims

1. An inverted V-shaped structure condensing heat exchanger for gas water heaters, characterized in that: it includes a smoke collection hood, the condenser box is arranged above the smoke collection hood through the condenser bracket, the bottom of the condenser box and the smoke collection hood There is no direct contact between them; the smoke inlet is set in the middle of the bottom of the condenser box, and is matched with the opening on the top of the smoke collection hood; the bellows array composed of bellows is set above the bottom of the condenser box, and the inverted V-shaped baffle is set Above the bellows array, the condenser cover is set on the top of the condenser box, the bellows array and the inverted V-shaped baffle are covered in the condenser box, and the smoke exhaust port is set on the condenser cover; the condensate outlet is set with a condenser bottom of the box.

2. The inverted V-shaped condensing heat exchanger for gas water heater according to claim 1, characterized in that: the angle formed by the two sides of the inverted V-shaped baffle is 120°-170°; the inverted V The two edges of the V-shaped baffle are bent downwards at a certain angle and length relative to the inverted V-shaped baffle, half-surrounding the bellows closest to the edge of the inverted V-shaped baffle.

3. The inverted V-shaped condensing heat exchanger for gas water heaters according to claim 2, characterized in that: the angle formed by the two sides of the inverted V-shaped baffle is 150°; The tubes have the same diameter and are bent at an angle of 30° relative to the inverted V-shaped baffles.

4. The inverted V-shaped condensing heat exchanger for gas water heaters according to any one of claims 1 to 3, characterized in that: the bent parts of the two edges of the inverted V-shaped baffle are connected to the condenser box There is a cut-off channel between the inner walls.

5. The inverted V-shaped condensing heat exchanger for gas water heaters according to claim 1, wherein the two sides of the bottom of the condenser box are parallel to the corresponding sides of the inverted V-shaped baffles.

6. The inverted V-shaped condensing heat exchanger for gas water heaters according to claim 1, characterized in that: the smoke collecting hood is a "eight"-shaped opening structure with a wide bottom and a narrow top, and the clip formed at the top is The angle is smaller than the included angle formed by the two sides of the inverted V-shaped baffle. the

7. The inverted V-shaped condensing heat exchanger for gas water heater according to claim 1 or 6, characterized in that: the angle formed by the top of the smoke collection hood is 120°, and the top of the smoke collection hood is open The width is preferably twice the diameter of the bellows, and the opening at the bottom matches the opening of the main heat exchanger; horizontal bends are provided on both edges of the smoke collection hood, and the condenser bracket is set at the bending position, and the smoke collection hood is connected to the condenser bracket through the The bottom of the condenser box is fixedly connected.

8. The inverted V-shaped condensing heat exchanger for gas water heaters according to claim 1, characterized in that: the bellows array composed of the bellows is a parallel bellows fork array arranged at a certain vertical tube center distance The array tubes are arranged in the areas on both sides of the smoke inlet, and are arranged axially symmetrically with respect to the smoke inlet.

9. The inverted V-shaped structure condensing heat exchanger for gas water heaters according to claim 8, characterized in that: the structure of the parallel corrugated tubes fork row array tubes is: on the side of the smoke inlet, the lower two The water inlet pipes are connected in parallel, winding from the front side of the smoke inlet to the back side of the smoke inlet in a serpentine shape, and then winding back to the front side of the smoke inlet according to a certain horizontal distance between the pipe cores. Evenly and symmetrically wound three rows continuously; and on the other side of the smoke inlet, after parallel connection with the two parallel outlet pipes located above it at a certain vertical distance from the tube center, the two parallel outlet pipes are reversely wound back along the two parallel inlet pipes Above the starting point of the two parallel water inlet pipes, a symmetrical three-column and four-layer parallel corrugated tube cross-bar array tube is formed on both sides of the condenser box. The corresponding sides of the inverted V-shaped baffles are parallel, so that the parallel corrugated tubes are evenly distributed on both sides of the condenser.

10. The inverted V-shaped condensing heat exchanger for gas water heaters according to claim 8 or 9, characterized in that: the parallel corrugated tubes are horizontally arranged in each layer of horizontal array tubes in each area The tube core spacing is twice the bellows diameter; the vertical tube core spacing between layers is 1.5 times the bellows diameter. the