CN100458353C

CN100458353C - Braze welded plate heat exchanger in novel shape

Info

Publication number: CN100458353C
Application number: CNB031195083A
Authority: CN
Inventors: 缪志先
Original assignee: Individual
Current assignee: HONGSHENG HEAT EXCHANGER MANUFACTURING Co Ltd
Priority date: 2003-03-07
Filing date: 2003-03-07
Publication date: 2009-02-04
Anticipated expiration: 2023-03-07
Also published as: CN1527018A

Abstract

The braze welded plate heat exchanger in novel shape has angle hole in petal shape and intact peripheral foam. When several corrugated plates are assembled together, there is no blind hole in the passages comprising angle holes. The present invention has less eddy flow and burr stagnation, and thus lowered fluid resistance of medium in the angle hole. In addition, the angle hole in petal shape may serve as liquid phase separator with less ice jamming possibility. The present invention is especially suitable for braze welded aluminum plate heat exchanger.

Description

Brazing plate type heat exchanger with novel angular aperture shape and angular aperture side foam shape

Technical field

The present invention relates to a kind of heat exchanger, relate in particular to a kind of brazing plate type heat exchanger.

Background technology

The hole, angle of general brazing plate type heat exchanger all is circular, for the reliable sealed with brazing of hole, angle faying face and in order between two heat exchanger fins, to leave the MEDIA FLOW road junction, periphery in the hole, angle generally is provided with the limit bubble, for the limit bubble of this periphery of angled hole of circulation diameter in hole, widening angle as far as possible generally is half of existence form, this weak point that has the plate groups of half of limit bubble to dress up brazing plate type heat exchanger at angle Kong Chu is; These half of limit bubbles that exist will form blind hole hole and MEDIA FLOW road junction one by one on the conduit wall of being made of the hole, angle after the plate assembling, the existence in this blind hole hole can make medium each place, blind hole hole in the hole, angle produce local eddy currents, thereby the real fluid sectional area that this eddy current can make the runner mouth less than the manufacturing sectional area of runner mouth add the fluid resistance at place, orifice flow road junction, big angle, hole, punching out angle is certain to leave the punching burr in addition, this burr can spread over blind hole hole and the runner mouth place that faces mutually owing to the half of bubble of compacting, these burrs itself will be detained the material in some heat transferring mediums, because the eddy current that the blind hole hole produces just in time acts on the burr place of runner mouth, more aggravated to be detained the ability of material in the heat transferring medium and accelerated formation at runner mouth place deposit, more strengthened the fluid resistance at place, orifice flow road junction, angle thus, the hole, angle of brazing plate type heat exchanger is less than normal in addition, the ripple height is lower, the pitch of waves is less, can not take various factors such as cleaning apart, the service life of brazing plate type heat exchanger and range of application are restricted.

Brazing plate type heat exchanger often is used to the lower refrigerating evaporator of operating temperature at present, and under the eddy current and burr acting in conjunction of the refrigerating medium in the refrigerating evaporator in angular hole path, each runner mouth place is easy to be detained the material in the refrigerating medium medium and forms and piles up between plate, cause the flow area of local certain runner mouth tiny gradually, flow and flow velocity reduce gradually, it is stifled that this refrigerating medium is easy to form local ice at certain runner mouth place of being obstructed under the effect of refrigerating evaporator opposite side cold-producing medium, stifled its volume meeting of material of this part ice is constantly expanded and will finally be caused stifled hole, the angle faying face of locating of this part ice to be iced stifled material spreading and makes heat transferring medium string chamber, will produce very serious consequence thus.

Summary of the invention

The purpose of this invention is to provide a kind of vortex phenomenon that in angular hole path, can reduce, reduce the brazing plate type heat exchanger with novel angular aperture shape and angular aperture side foam shape of burr delay effect.

The object of the present invention is achieved like this: the brazing plate type heat exchanger with novel angular aperture shape and angular aperture side foam shape includes corrugated cardboard sheet and hole, angle, and the shape in hole, angle is petal, and the limit bubble of periphery of angled hole is complete.

The present invention has following advantage and good effect: 1, because the limit of periphery of angled hole bubble is complete, therefore cancelled the blind hole hole in the angular hole path and avoided consequent vortex phenomenon, the fluid resistance of heat transferring medium will reduce and can reduce the delay effect of burr and avoid the accumulation of retentate.2, because the limit of periphery of angled hole bubble is complete, the medium that can make the hole, angle of flowing through has good fluid properties and less flow resistance when entering between plate heat exchange.3, petal angular aperture shape can play the effect of liquid phase divider; It can make the liquid phase-change medium of low discharge be evenly distributed on after entering the passage of being made up of the hole, angle in each runner of being made up of corrugated cardboard sheet, make this liquid phase-change medium can be in each runner fully and phase transformation vaporization equably.4, petal its peripheral line length of angular aperture shape can strengthen medium than length and enter actual internal area between each plate.5, petal angular aperture shape can make during obstruction that heat transferring medium avoids the limit bubble flows into heat exchange zone between each plate from the circular arc at petal top, can greatly reduce the fluid resistance of heat transferring medium at place, hole, angle thus.6, after this brazing plate type heat exchanger was stopped using emptying, petal angular aperture shape can make the heat transferring medium that is trapped in this brazing plate type heat exchanger minimize.7, petal angular aperture shape can make brazing plate type heat exchanger reduce the stifled probability of its generation ice when being applied to refrigerating evaporator.

Fig. 1, brazing plate type heat exchanger hole, petal angle and A-A cross-sectional schematic;

Fig. 2, hole, the petal angle of brazing plate type heat exchanger B-B cutaway view;

Describe the present invention in detail below in conjunction with drawings and Examples:

Fig. 1 has represented to have hole, petal angle 6 and the brazing plate type heat exchanger with complete edge bubble 5, for corrugated cardboard sheet 10, intensity and the shock resistance of hole 6, petal angle when media flow on 11, the hole, angle of same position on front apron 9 and the backboard 12 is made and corrugated cardboard sheet 10, same petal shape in hole, angle 6 and soldering are together on 11, before also can making, backboard 9, angle bore dia on 12 is less than or equal to corrugated cardboard sheet 10, the minimum latus rectum 3 in hole, petal angle 6 on 11, if heat transferring medium and heat exchange character allow, and is preceding, backboard 9, angle bore dia on 12 can be less than or equal to corrugated cardboard sheet 10, the maximum diameter 4 in hole, petal angle 6 on 11.Can leave ring limit 2 in the bottom of limit bubble 5, corrugated cardboard sheet 10,11 and forward and backward plate washer 9,12 mutually on the assembling back following bubble 5 offset and the soldering ring limit 2 that 5 bottoms are steeped on the limit together the time also closely contact also soldering together mutually, hole, angle 6 on corrugated cardboard sheet 10,11 also can be circular and other various suitable shapes, with the petal quantity in hour angle hole 6 also without limits.

Wherein a kind of assembling of brazing plate type heat exchanger and soldering form have only been represented in the existence of represented type bar 13 and grommet 1 and plate flange 8 signal among Fig. 2, X among Fig. 2 has represented a kind of heat transferring medium and passage and runner, Y has represented another kind of heat transferring medium and passage and runner, Z represented product in this zone without any heat transferring medium.Ozzle 7,14 on this brazing plate type heat exchanger can adopt any suitable assembling mode to be connected with forward and backward plate washer 9,12, sealing means between ozzle 7,14 and the forward and backward plate washer 9,12 can adopt any suitable sealed-for-life technology to be connected and sealed, and the implication of sealed-for-life comprises; Can adopt the mode integral braze-welded with heat exchanger, can adopt the mode of argon arc welding and various meltings, before assurance, back plate washer 9,12 with corrugated cardboard sheet 10, under the prerequisite of 11 integral braze-welded quality, and guaranteeing ozzle 7,14 with before, back plate washer 9, under the prerequisite of 12 positiver sealings, even can adopt pressure butt welding, glued joint, the mode that riveted joint waits other to be tightly connected, under the condition that if the operating pressure of this brazing plate type heat exchanger is less demanding and heat exchange requires to allow, before can cancelling, back plate washer 9,12, with ozzle 7,14 direct and corrugated cardboard sheets 10, hole, angle 6 on 11 comprises that grommet 1 sealed-for-life links together.Represented corrugated cardboard sheet 10,11 can be considered to be used for the effluent brazing plate type heat exchanger among Fig. 2, but rigging position difference, maybe can be considered to be used for to the angular flux brazing plate type heat exchanger, can also be considered to simultaneously to be used to have the signal of corrugated cardboard sheet of the brazing plate type heat exchanger of three kinds of common heat exchange of heat transferring medium, whether the existence that utilizes hole, angle 6 on the corrugated cardboard sheet 10,11 makes each internal channel of this brazing plate type heat exchanger all can form the heat exchange form of multipaths.

Claims

1, the brazing plate type heat exchanger that has novel angular aperture shape and angular aperture side foam shape, assemble by some corrugated cardboard sheets (10,11) that have hole, angle (6), it is characterized in that: the shape in the hole, angle (6) on the described corrugated cardboard sheet (10,11) is petal, and the limit bubble (5) of hole, described angle (6) periphery is complete.

2, brazing plate type heat exchanger according to claim 1, it is characterized in that: the front end at described heat exchanger is provided with front apron (9), be provided with backboard (12) in the rear end of described heat exchanger, the shape in the hole, angle (6) on the hole, angle on front apron (9) and the backboard (12) and the described corrugated cardboard sheet (10,11) is identical, and with adjacent described corrugated cardboard sheet (10,11) on hole, angle (6) soldering together.

3, brazing plate type heat exchanger according to claim 1 is characterized in that: the bottom of described limit bubble (5) is provided with ring limit (2).

4, brazing plate type heat exchanger according to claim 1 is characterized in that: described brazing plate type heat exchanger is with the effluent heat exchanger.

5, brazing plate type heat exchanger according to claim 1 is characterized in that: described brazing plate type heat exchanger is to the angular flux heat exchanger.

6, brazing plate type heat exchanger according to claim 1 is characterized in that: described brazing plate type heat exchanger is the heat exchanger with three kinds of common heat exchange of heat transferring medium.

7, brazing plate type heat exchanger according to claim 1 is characterized in that: the periphery of described limit bubble (5) is provided with grommet (1).

8, brazing plate type heat exchanger according to claim 2 is characterized in that: the diameter in the hole, angle on the described forward and backward baffle plate (9,12) equals the minimum latus rectum (3) that described corrugated cardboard sheet (10,11) is gone up hole, petal angle (6).

9, brazing plate type heat exchanger according to claim 2 is characterized in that: the diameter in the hole, angle on the described forward and backward baffle plate (9,12) equals the maximum diameter (4) that described corrugated cardboard sheet (10,11) is gone up hole, petal angle (6).