CN2088674U - Tube plate welding type heat exchanger for refrigerator (freezer) - Google Patents

Abstract

The utility model relates to a tube plate welding type heat exchanger for a refrigerator (a freezer), which makes a metallic pipe fixedly welded on a metallic plate by the modes of spot welding, glue type spot welding and brazing, and spot welding or brazing. The tube plate welding of the utility model is firm in property, tight in contact, good in heat conductibility, few in consumption of raw material and lower in product cost and equipment investment. The utility model can ensure the tube to not uncouple in transportation, processing and assembly.

Description

Tube plate welding type heat exchanger for refrigerator (freezer)

The utility model relates to a kind of refrigerator (refrigerator) heat exchanger.

Refrigerator in refrigeration industry (refrigerator) heat exchanger is the general designation of evaporimeter and condenser.The course of work of the two is reciprocal.The utility model is just with evaporator of refrigerator technology as a comparison.Existing evaporator of refrigerator is more common printing pipeline type aluminum evaporation device, be on two aluminium sheet composition surfaces, to stamp the pipeline that interconnects with " exempting from solder flux ", by heating and pressurization two aluminium sheet seam are in the same place, and the end, printing pipeline place that is printed on " exempting from solder flux " is by seam, when feeding high-pressure fluid, all not risen by seam printing pipeline together sticks out, and forms the pipeline that interconnects.Rinse well exempting from solder flux in the pipeline, be welded into refrigeration system with special copper-aluminium tube joint.Printing pipeline place is for the thinnest in the evaporator of refrigerator of making, and two aluminium sheet seam place are the thickest again.And effect as the fin and the refrigerator inside panel face of evaporation tube is only played in two aluminium sheet seam place in actual use.Gross thickness according to its role two aluminium sheet seam place has 0.5 millimeter, just can reach requirement.In order to guarantee to print the leakage that pipeline has certain intensity and prevents cold-producing medium, require thinnest part that 0.5 to 0.7 millimeter should be arranged, two aluminium sheets are needed 4 to 5 times thickness by seam place so, so gross thickness is generally in 3 millimeter.So just increased the weight of evaporator of refrigerator, raw materials consumption is also more, has correspondingly strengthened cost.In addition, because of the printing pipeline (evaporation tube) of this evaporimeter directly contacts with food, be subject to acid and alkali corrosion in the food.Owing to could be connected with the copper capillary in the refrigeration system and the inlet pipe connection soldering of compressor after must welding with the printing pipeline on two special copper-aluminium tube joints and the evaporimeter, thereby increase the welding point number, promptly increase unreliable factor.In case after a period of time is used in joint dry joint (being difficult to find for the moment), the cold-producing medium leakage phenomenon may occur.In production in enormous quantities, often be difficult for to guarantee the high qualification rate of product, and it is complicated to make the technology and the special equipment of this evaporator of refrigerator.

The another kind of tube sheet veneer type evaporimeter of employing is also arranged, the metal coil pipe is bonded on the metallic plate with heat-conducting glue.In order to increase the bonding strength of the two, the press strip that two narrow aluminium sheets of the usefulness that has are made laterally compresses two of metal tube, uses the heat-conducting glue cementation again.Or with two metallic plates with the metal dish pipe clamp in the centre, two metallic plates and coil pipe are bonded together.Because bonding intensity is lower, when transportation, processing bend to the inner wall shape of refrigerating chamber and in use the metal coil pipe get loose easily or the tube sheet contact not tight, refrigeration relatively also is affected.So general refrigerator producer is self manufacture at the scene all, is unsuitable for carrying out specialized large-scale production.Equally, internal-mounted condenser also exists tube sheet to connect illusive problem.

The purpose of this utility model provides that a kind of cost is low, the raw material loss is few, and heat-conductive characteristic is good, and tube sheet connects reliable, can not get loose in transportation, processing are installed or used, and contacts the formula of tube sheet seam closely refrigerator (refrigerator) heat exchanger.

Solution of the present utility model is: employing spot welding and gummed or spot welding and soldering or spot welding or soldering on metallic plate, make it to become integral body with the metal tube solid welding, make different shape as required, tube sheet seam formula refrigerator (refrigerator) heat exchanger that size differs.

Can clearly demonstrate the utility model from following embodiment and accompanying drawing:

Fig. 1-be the structural representation of freezer evaporator

Fig. 2-be the structural representation of refrigerator evaporator

As shown in the figure, making pancake with the bottom of metallic plate 1 contacted metal coil pipe 2, i.e. its cross section semicircular in shape, to increase the contact area of metal coil pipe 2 and metallic plate 1, help spot welding, soldering or gummed, and reduce the thermal resistance at both jointing places as far as possible, be convenient to the conduction of heat.And the cross section of metal coil pipe two ends 3 still is circular, helps soldering and inserts in the refrigerator refrigeration piping system.Be separated by on the metal coil pipe 2 segment distance with resistance spot weld or more powerful ultrasonic spot welder with its solid welding on metallic plate 1, metallic plate 1 and metal coil pipe 2 contact positions heat-conducting glue cementation beyond the solder joint, the upper and lower flanging 4 that booster action has been arranged of freezer evaporator among Fig. 1, and all there is flanging 4 on refrigerator evaporator four limits among Fig. 2.The utility model can be welded in 2 in metal coil pipe on the metallic plate 1 according to actual conditions and different requirements, carries out the soldering connection with resistance solderer or ultrasonic brazing machine again beyond the solder joint.Also can only the two be welded with spot welding or soldering.When using spot welding and soldering or spot welding or brazing mode weld metal pipe and metallic plate; for avoiding external liquid to immerse spot welding or soldered fitting place; form the contact corrosion and the electrochemical corrosion of dissimilar metal; should be after thoroughly cleaning and drying the welding point place; make the waterproofing protection film with paint film or viscose glue at the joint outer surface; in the present embodiment raw-material optimal selection be with composite steel tube as the evaporation tube solid welding on aluminium sheet; can save special copper-aluminium tube joint like this; just can be directly with refrigeration system in copper capillary soldering is connected with inlet pipe connection; reduced the number of soldered fitting; increased the reliability that connects, cost is also lower.Secondly can adopt being connected of composite steel tube and corrosion resistant plate.Also can select for use aluminum pipe to be connected, could be connected with the pipe-line system soldering in the refrigeration system but must be equipped with special copper-aluminium tube joint with aluminium sheet.Also can adopt the welding of copper pipe and aluminium sheet.Also available steel plate replaces aluminium sheet.The utility model should carry out surface treatments such as oxidation, passivation or paint film according to different needs to it, to increase its barrier propterty and to satisfy the requirement of incrustation, freezer evaporator among Fig. 1 is made strip, mainly be to be convenient to packing and transportation, refrigerator manufacturer can bend to the shape of freezer indoor wall with it according to the shape and the size of freezer compartment of refrigerator before assembling.

The utlity model has following advantage, owing to adopt spot welding and gummed, the mode of soldering etc. welding with the metal tube solid welding on metallic plate, therefore it connects reliably, and contact is tight, and heat-conductive characteristic is good, raw materials consumption is few, cost is low, is difficult for getting loose in transportation, processing are installed or used, and is convenient to extensive specialized production.If adopt the mode of spot welding and gummed that tube sheet is connected together, its plate face is more smooth attractive in appearance.

The utility model is not limited to above several embodiment, and some refrigerators, freezer factory all can adopt this structure when making the evaporimeter of built-in metal inner surface or internal-mounted condenser at the scene, equally also can obtain good effect.

Claims (3)

1, a kind of tube sheet seam formula refrigerator (refrigerator) heat exchanger that metal tube and metallic plate are linked into an integrated entity, the mode that it is characterized in that adopting spot welding and gummed or spot welding and soldering or spot welding or soldering with metal tube (2) solid welding on metallic plate (1).

2, refrigerator according to claim 1 (refrigerator) heat exchanger is characterized in that metal tube (2) is composite steel tube or aluminum pipe or copper pipe.

3, refrigerator according to claim 1 and 2 (refrigerator) heat exchanger is characterized in that metallic plate (1) is aluminium sheet or corrosion resistant plate or copper coin or aludip.