CN201000295Y

CN201000295Y - Heat exchanging piece with reinforced heat absorption performance

Info

Publication number: CN201000295Y
Application number: CNU2007200478907U
Authority: CN
Inventors: 黄启均; 杨湧涛; 易洪斌
Original assignee: Zhongshan Vatti Gas Appliance Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2007-01-26
Filing date: 2007-01-26
Publication date: 2008-01-02
Anticipated expiration: 2017-01-26

Abstract

The utility model relates to the water heater field, with the purpose to override the disadvantage of the prior art, and provides a heat exchange fin with enhanced heat absorptivity. The utility model comprises a flaky heat exchange main body and an assembly hole for assembling the heat exchange fin on the heat absorption pipe, and the improved structure is to make mechanical treatment on the existing heat exchange fine structure and forms a dummy club structure which has an opening along the air flow direction. By the structure design of the structure, the area heat exchange fin is not increased too much, but the contact probability of the heat exchange fin and the heat absorption pipe and the fever heat air flow form by combustion is relatively increased. The boundary layer forms a turbulent flow because of the salience when the fever heat air flow is flowing along the dummy club, and the heat exchange is more sufficient. The arrangement of the dummy clubs reduces the flow speed of the fever high air flow at the same time, and the heat transfer conductance is more sufficient. Moreover, when the fever high air flow is flowing along the dummy clubs with special shapes, the flowing direction of the fever high air flow is changed, and the heat exchange effect of the alee area of the existing heat absorption pipe is enhanced, therefore, the utility model has the advantages of high efficiency and energy saving.

Description

A kind of heat exchanger fin with enhancing heat absorption capacity

Technical field

The utility model relates to water heater accessory field, the heat exchanger fin on a kind of heat exchanger that is used for gas heater of saying so more specifically.

Technical background

At present, general heat exchanger all is the dull and stereotyped heat exchanger fin that adopts the suit number of plate-shaped that is parallel to each other on endothermic tube on the water heater, fixedly forms with clamping plate at two ends.The time having most high thermal current in work and directly flowing away without heat exchange of the heat exchanger of this structure cause the loss of energy, and heat exchanger fin is the key components and parts of heat exchange; New gas heater efficiency standard is about to put into effect, and new standard has higher requirement to the thermal efficiency; Energy-saving product is to produce the problem that family pays close attention to always, and how raising the efficiency under the prerequisite that does not increase the product material cost, saving energy and reduce the cost is an important counterweight of competition among enterprises.

The utility model content

The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, and the structure of existing heat exchanger fin is improved, and a kind of heat exchanger fin that strengthens heat absorption capacity that has is provided, thereby improves the thermal efficiency of gas heater.

The utility model is achieved through the following technical solutions its technical problem to be solved.

The utility model provides has the heat exchanger fin that strengthens heat absorption capacity, comprises sheet heat exchanger fin main body and is used for heat exchanger fin is assemblied in pilot hole on the endothermic tube, and its structure-improved is to carry out machining to form some boss structures on existing heat exchanger fin structure.

Described boss is included in the plane upper shed of heat exchanger fin main body and is shaped as the rectangular boss of rectangle and/or is shaped as trapezoidal trapezoid boss in the plane upper shed of heat exchanger fin main body.The cross sectional shape of boss is that trapezoidal, trapezoidal base angle scope is 30 degree～60 degree.Described boss is arranged on the heat exchanger fin main body a corresponding endothermic tube pilot hole side of air-flow dorsad.The projection direction of these boss on heat exchanger fin main body plane is same direction, and boss has the opening of perforation along airflow direction.

That is to say, around the pilot hole of heat exchanger fin main body, process the trapezoidal boss structure that combines with rectangle, its moulding angle is followed the flow direction of high thermal current substantially, heat exchanger fin forms double-decker like this, heat exchanger fin after will processing then is installed on the endothermic tube by normal operation, like this, though on the theoretical area of heat exchanger fin do not increase too many, relative the increasing of contact probability of heat exchanger fin and endothermic tube and high thermal current; And the boundary layer formed turbulent flow because of projection when high thermal current was flowed through boss, made heat exchange more abundant; The setting of these boss has slowed down the flow velocity of high thermal current simultaneously, makes heat exchange more abundant; Simultaneously, high thermal current is flowed through, and these have the boss of special shape, and the flow direction of high thermal current is understood some change, and this has also strengthened heat exchanger fin by the heat exchange effect of endothermic tube barrier zones (being to be positioned at the side of former endothermic tube back to air-flow on the heat exchanger fin).

Hence one can see that, and the utility model has following substantive distinguishing features and progress with respect to prior art:

1. the heat absorption capacity of heat exchanger fin has very big lifting, has directly improved the thermal efficiency of water heater;

2. the boss on the heat exchanger fin sheerly in the moulding processing to metal, does not increase the heat exchanger fin material;

3. the mould of processing boss is simple, and not increasing how many expenses can realize.

Description of drawings

Be described further the utlity model has the heat exchanger fin that strengthens heat absorption capacity below in conjunction with the drawings and specific embodiments.

Fig. 1 is the front view of the utility model heat exchanger fin;

Fig. 2 is an A-A sectional view among Fig. 1;

Fig. 3 is a B-B sectional view among Fig. 1;

Fig. 4 is a C-C sectional view among Fig. 1;

Fig. 5 is the stereogram of the heat exchanger of application the utility model heat exchanger fin;

The specific embodiment

Shown in Fig. 1 to 5, heat exchanger fin main body 1 is assemblied on the endothermic tube 6 by specification requirement, is processed with the pilot hole 2 of equally distributed several endothermic tubes 6 on the sheet heat exchanger fin main body 1 of flat board, and these pilot holes divide two rows, and the mutual dislocation setting.Rectangular boss 3 be arranged on down row's endothermic tube pilot hole 2 directly over, isosceles trapezoid boss 4 is arranged in the middle of two row's of going up endothermic tube pilot holes 2, right-angled trapezium boss 5 is arranged on the outside of endothermic tube pilot hole 2 at two ends or the side top of two endothermic tube pilot holes 2 and the hypotenuse of isosceles trapezoid boss 4 and right-angled trapezium boss and tilts to the center position of endothermic tube pilot hole 2, and each boss mainly works the function that strengthens heat absorption and change airflow direction.Shown in accompanying drawing 2 to 4, the cross sectional shape of these

boss

3,4,5 is trapezoidal, and the base angle scope of this trapezoid cross section is about 30 degree～60 degree.And the projection direction (bearing of trend that promptly add man-hour) of these

boss

3,4,5 on heat exchanger fin main body 1 plane is all towards the same side of heat exchanger fin main body 1, simultaneously, the opening G that has perforation at

boss

3,4,5 upper edge airflow directions, so that air-flow flows through, thereby increase heat exchange area from the formed interlayer in heat exchanger fin main body 1 plane and boss bottom surface.

For satisfying the materials processing demand, require the outer ledge of all

boss

3,4,5 and the distance of pilot hole 2 to be not less than 3mm; Require the outer ledge of all

boss

3,4,5 and the outer ledge distance of heat exchanger fin main body 1 to be not less than 2mm; Require 3,4,5 beelines of any adjacent lands to be not less than 3mm; The height of

boss

3,4,5 is not more than 2/3 of two heat exchange distance between commutator segments.

As shown in Figure 5, heat exchanger fin of the present utility model is sleeved on the endothermic tube 6 by pilot hole 2, is installed on the top, combustion chamber.Why this heat exchanger fin can realize strengthening effect, be that mainly high

thermal current

3,4, the 5 o'clock boundary layers of boss of flowing through form turbulent flow because of the projection of boss, increased the heat exchange probability of endothermic tube and high thermal current, heat exchange is abundant, some change of part air flow direction when flowing through isosceles trapezoid boss 4 and right-angled trapezium boss 5 simultaneously, thereby flow to the top (with respect to the back side of air-flow directly perceived) of endothermic tube along trapezoidal hypotenuse, strengthened effective heat absorption of heat exchanger fin.When burner operation, the heat exchanger of using the utility model heat exchanger fin just can realize strengthening the effect of heat exchange.

Claims

1. one kind has the heat exchanger fin that strengthens heat absorption capacity, comprises sheet heat exchanger fin main body (1), and heat exchanger fin main body (1) is provided with endothermic tube pilot hole (2), it is characterized in that: described heat exchanger fin main body (1) is provided with some boss.

2. according to the described heat exchanger fin with enhancing heat absorption capacity of claim 1, it is characterized in that: described boss is included in the plane upper shed of heat exchanger fin main body and is shaped as the rectangular boss (3) of rectangle and/or is shaped as trapezoidal trapezoid boss (4,5) in the plane upper shed of heat exchanger fin main body.

3. according to the described heat exchanger fin with enhancing heat absorption capacity of claim 1, it is characterized in that: the cross sectional shape of described boss is that trapezoidal, trapezoidal base angle scope is 30 degree～60 degree.

4. have a heat exchanger fin that strengthens heat absorption capacity according to claim 1 is described, it is characterized in that: described boss is arranged on the heat exchanger fin main body a corresponding endothermic tube pilot hole side of air-flow dorsad.

5. according to the described heat exchanger fin with enhancing heat absorption capacity of claim 4, it is characterized in that: endothermic tube pilot hole (2) divides two rows and mutual dislocation setting; Described boss (3) be separately positioned on down row's endothermic tube pilot hole directly over and the side top of last row's endothermic tube pilot hole.

6. according to the described heat exchanger fin with enhancing heat absorption capacity of claim 1, it is characterized in that: the projection direction of described boss on heat exchanger fin main body plane is same direction.

7. according to each described heat exchanger fin with enhancing heat absorption capacity of claim 1 to 6, it is characterized in that: described boss has the opening of perforation along airflow direction.