CN106052197A - Flat plate type evaporator and manufacturing method thereof - Google Patents

Abstract

The invention relates to a flat plate type evaporator. The flat plate type evaporator comprises a coil and metal wires. The coil is formed by connecting a plurality of elbows, and the multiple elbows are formed by bending a straight pipe multiple times in a plane. The two ends of the coil are connected with an inlet pipe and an outlet pipe correspondingly. The metal wires are fixedly connected to the front face and the back face of the coil. Each elbow comprises a first arc pipe, a second arc pipe, a first straight pipe, a second straight pipe and an oblique pipe; the lower end of the first straight pipe is connected with one end of the first arc pipe, and the upper end of the first straight pipe is connected with one end of the oblique pipe; the other end of the oblique pipe is connected with one end of the second arc pipe, and the other end of the second arc pipe is connected with the upper end of the second straight pipe; the lower end of the second straight pipe is connected with the first arc pipe of the adjacent elbow; the first straight pipe is parallel to the second straight pipe; and the first straight pipe, the second arc pipe and the second straight pipe are connected to form a 9-shaped structure. The flat plate type evaporator has the characteristics of being compact in structure, low in production cost, high in heat exchange efficiency and the like.

Description

Plate evaporator and preparation method thereof

Technical field

The present invention relates to vaporizer technology field, be specifically related to plate evaporator and preparation method thereof.

Background technology

Vaporizer is the parts of refrigerator system, and the heat in pipe can pass to the air of pipe accessories.In the market Most of evaporator of refrigerator volumes relatively big, production cost is high, and the installing space of needs is big, operationally can produce vibration, make an uproar Sound is relatively big, affects the service life of refrigerator, and rate of heat exchange is low, and can affect evaporation structure during vibration Compactedness, thus cause heat-conducting effect and radiating effect undesirable.

Summary of the invention

For above-mentioned technical problem, the present invention provides a kind of volume moderate, and production cost is low, compact conformation, and heat exchange is imitated Plate evaporator that rate is high and the manufacture method of this plate evaporator.

Realize technical scheme as follows:

The manufacture method of plate evaporator, comprises the following steps,

The first step: blanking, chooses a Bundy tube and a steel wire and by automatic blanking machine blanking, and steel wire is again by blanker Cut into the little steel wire that many root lengths degree is consistent；

Second step: enlarging, carrys out enlarging by any one port of Bundy tube in the first step by pipe-expanding machine, and another port is by justifying Mouth machine carries out round mouth；

3rd step: bend pipe, is bent into the coil pipe of " 9 " font on bending machine by the Bundy tube in second step；

4th step: clean, uses ultrasonic equipment to be carried out the little steel wire in the first step；

5th step: welding resistance, use row silk frock by the little steel wire weld in the 4th step on the coil pipe of the 3rd step, it is ensured that phase Spacing between adjacent little steel wire is consistent；

6th step: rush limit point, exceeds the little steel wire of coil pipe outermost pipe, little steel wire two ends and dish by punch press excision The center alignment of pipe；

7th step: silver soldering, is respectively welded copper pipe at the two ends of coil pipe, welding when ensure coil pipe be upright state also Use nitrogen is protected；

8th step: leak detection, is placed on the coil pipe in the 7th step at least 10s in pond of hunting leak, coil pipe two ends after having hunted leak Put dirt-proof boot, form vaporizer semi-finished product；

9th step: surface pretreatment, cleans vaporizer surface of semi-finished greasy dirt and impurity and is passivated shape at evaporator surface Become protecting film；

Tenth step: electrophoretic enamelling, drying, is carried out on surface in the vaporizer semi-finished product in the 9th step are placed on electrophoresis liquid Paint, after electrophoresis completes, is being placed on drying in oven after being blown off by the solidifying globule air gun on vaporizer semi-finished product, the product after drying Product will carry out managing interior nitrogen flushing and deposit；

Vaporizer tow sides in tenth step are carried out dusting and be placed on curing oven solidification by the 11st step: spraying solidification, Form flat evaporation tube finished product,

12nd step: finished product energising test, puts into test trough by the finished product in the 11st step, on vaporizer the most again Steel wire is totally immersed in solution, and is not sprayed onto at powder and can not immerse in solution, is switched on power by tester, by tester Terminal clamp clamping, on the copper pipe joint of vaporizer, stands reading numerical values after 5s, numerical value less than standard value for certified products.

The concrete method cleaned in 4th step is as follows, and steel wire often cleans 10 times, and that is washed by first discards, by second The first of pouring into washed washes use, and the second of pouring into crossed in the 3rd road washes interior use, and ultrasonic the 3rd road of pouring into washed is crossed and made With, in ultrasonic equipment, pour new cleanout fluid into.

11st step is dusted and comprises the following steps,

First being once to dust, first blow in surface positive and negative to vaporizer, remove evaporator surface adhesive dust, Grain, one side gassing time is not less than 5s, then vaporizer is sent into electrostatic dusting room dusts, electrostatic high-pressure 70-90KV, powder delivery Rate >=80%；

B. the vaporizer after above-mentioned electrostatic spraying is sent into curing oven solidification, solidification temperature: 185 ± 10 DEG C, linear speed 18- 26HZ (hardening time 23～28min)；

C. step a and step b, evaporator surface coating layer thickness ＜ 500 μm it are repeated once；

Being the most finally that secondary dusts, the straight tube on vaporizer will dried in step c puts and adds heat pipe and protect, then makes Carrying out secondary with spray gun to dust, only spray steel wire weld region during spraying, connecting tube, monolithic elbow do not dust；

The solution detected in groove in described 12nd step is made up of water, deionized water, sodium chloride and ethanolic phenolphthalein solution, and And the tank liquor conductance scope of any three diverse locations is 200 ± 30PPM in groove.

After described 12nd step further comprising the steps of,

13rd step: dress auxiliary, pressurize, overlaps thermal shrinkable sleeve at enlarging and at reducing, and at the outer plug of necking end set, at enlarging Put interior plug, vaporizer two ends set rubber stopper, be filled with drying nitrogen, then dress temperature-sensitive support and temperature detector on an evaporator, finally Pressurize in 24 hours is placed in being inserted in bubble bags.

Have employed said method, the plate evaporator of " 9 " font, the evaporation of this structure can be made easily and fast Device arrangement is compact, the length adding evaporation tube effectively but do not make its volume increase, i.e. add the bending of pipe Quantity, saves space and also substantially increases its heat exchange efficiency, and ruggedness is high, and the method materials are few, and product qualified rate height reduces Production cost, every operation is clear and definite, thus producers distribute rationally, are effectively improved production efficiency.

Plate evaporator, including coil pipe and tinsel, coil pipe is connected and composed by multiple bend pipes, and multiple bend pipe is by one Root straight tube is formed by repeatedly plain bending, is connected to inlet tube and outlet at the two ends of coil pipe, and tinsel is fixed Being connected to the tow sides of coil pipe, described bend pipe includes the first arc tube, the second arc tube, the first straight tube, the second straight tube and tiltedly Pipe, the lower end of the first straight tube is connected with one end of the first arc tube, and upper end is connected with one end of inclined tube, the other end of inclined tube and the One end of two arc tubes is connected, and the other end of the second arc tube and the upper end of the second straight tube are connected, the lower end of the second straight tube and phase The first arc tube on adjacent bend pipe is connected, and the first straight tube and the second straight tube are parallel, described first straight tube, the second arc tube and the Two straight tubes connect formation " 9 " character form structure.

Further, described tinsel is provided with many and formation wire surface arranged in parallel, in the middle part of wire surface Two ends are provided with breach, constitute installing space between this breach and coil pipe.

Further, it is provided with, in described installing space, the temperature detector being connected on coil pipe.

Further, described outlet is roundabout bottom the first arc tube, and outlet and the first arc tube parallel.

Further, stating and be arranged with reducing copper pipe on outlet, inlet tube is arranged with straight tube copper pipe, reducing copper pipe is with straight Pipe copper pipe is parallel.

Have employed such scheme, present configuration is the compactest, will not produce vibration during use, and noise is little, stable performance, In the case of ensureing vaporizer constancy of volume, effectively increase the length of evaporation tube simultaneously, significantly increase changing of vaporizer Thermal effect, it is ensured that it can be provided for a long term good refrigeration, setting wiry can strengthen the rigidity of vaporizer so that it is Structure is more firm, convenient during dismounting, also can increase heat conduction and heat radiation effect simultaneously.

Accompanying drawing explanation

Fig. 1 is the structural representation of coil pipe of the present invention；

Fig. 2 is the structural representation of little steel wire；

Fig. 3 is the structural representation of the present invention；

Fig. 4 is the structural representation of bend pipe in the present invention；

In accompanying drawing, 1 is tinsel, and 2 is coil pipe, and 3 is straight tube copper pipe, and 4 is reducing copper pipe, and 5 is thermal shrinkable sleeve, and 6 is bend pipe, 7 For inlet tube, 8 is outlet, and 9 is installing space, and 10 is temperature detector, and 61 is the first curved pipe, and 62 is the first straight tube, and 63 is oblique Pipe, 64 is the second curved pipe, and 65 is the second straight tube.

Detailed description of the invention

The present invention is further described with specific embodiment below in conjunction with the accompanying drawings.

The first step: blanking, the Bundy tube of material first Φ 8 × 0.7 in the present invention, it two is steel wire, under automatically Material machine cuts out Bundy tube and steel wire；Then steel wire is cut into, by blanker, the little steel wire that many root lengths degree is consistent again, such as Fig. 2 institute Showing, little steel wire here is divided into the length of two kinds of sizes A and B, B less than A, and the two ends of little steel wire are polished into spherical again by polisher Face, grinding angle is 60 ± 5 °, it is ensured that without sharp edge, without corner angle, after being the most first ready to by the material having, it is possible to accelerate follow-up more Production work, improves work efficiency；

Second step: enlarging, first by any one port dip-coating ethanol of the mouth of pipe, comes enlarging, enlarging by pipe-expanding machine the most again Size be Φ 8.2mm, it is ensured that flared surfaces without significantly crushing, flat wound, coarse draw bead, the defect such as scuffing, and another port Carried out round mouth, the most again nitrogen flushing in pipe, nitrogen flushing pressure >=1.5MPa, time 5S by circular opening machine, be effectively guaranteed table in pipe Face is cleaned, without greasy dirt, No oxidation discoloration；

3rd step: such as Fig. 1, bend pipe, multiple bending point, then bending on bending machine will be taken in the Bundy tube in second step Becoming the coil pipe 2 that multiple " 9 " font is constituted, the radius bend at the upper and lower two ends of coil pipe is R18mm, so can ensure that the work after bending Part is straight, prevents workpiece warpage, allows the caliber deformation≤20% of coil pipe bending part here, it is ensured that the feelings of the performance of workpiece Under condition, reduce work difficulty and product rejection rate；

4th step: clean, uses ultrasonic equipment to be carried out the little steel wire in the first step, and scavenging period is 3 minutes, In the present invention, trichloro ethylene selected by cleanout fluid, and cleaning process is " one clear, two wash, three cross ", and concrete, steel wire often cleans 10 Secondary, that is washed by first is discarded, and the first of pouring into washed by second washes use, and pouring in second is washed of being crossed in the 3rd road makes With, use is crossed in ultrasonic the 3rd road of pouring into washed, in ultrasonic equipment, pours new cleanout fluid into, so can be possible not only to protect The cleannes of card steel wire, and can also economize on resources, cost-effective, meet the strategy of sustainable development of country；

5th step: welding resistance, employing arranges silk frock by the little steel wire weld in the 4th step on the coil pipe of the 3rd step, adjacent little Spacing between steel wire is 114mm, little steel wire be specifically ordered as A-B-A, as shown in Figure 3；

6th step: rush limit point, exceeds the little steel wire of coil pipe outermost pipe, little steel wire two ends and dish by punch press excision The center alignment of pipe, it is ensured that the aesthetic property of product structure；

7th step: silver soldering, is respectively welded straight tube copper pipe 3 and reducing copper pipe 4 at the two ends of coil pipe, ensures welding when Coil pipe is upright state and uses nitrogen to protect, and nitrogen pressure is 0.03Mpa, the length of penetration >=6mm of solder, this kind of method Welding ensure that the flatness of product, it is possible to prevents local from tilting；

8th step: leak detection, is placed on the coil pipe in the 7th step at least 10s in pond of hunting leak, observes and have No leakage, if there being gas Bubble, remedies again according to air leakage point, after having hunted leak, coil pipe two ends is put dirt-proof boot, forms vaporizer semi-finished product；

9th step: surface pretreatment, detects and cleans vaporizer surface of semi-finished greasy dirt and impurity and at evaporator surface Passivation forms moisture film, in order to ensure that the enamelled coating on next step vaporizer will not peel off, the cleanout fluid standard such as following table of detection,

When carrying out above-mentioned detection, need to prevent solution from entering in pipe the mouth of pipe rubber plug sleeve plug of vaporizer semi-finished product, And need to detect at any time the total acidity of degreasing and rust removal solution and passivator solution during detection, and do at any time according to testing result Adjusting, the method can process large batch of product, obvious for product surface treatment effect, and production efficiency is high, it is possible to reduces Production cost；

Tenth step: electrophoretic enamelling is dried, and carries out table in vaporizer semi-finished product qualified in the 9th step are placed on electrophoresis liquid Face japanning, electrophoretic enamelling liquid and drying standard such as following table,

After electrophoresis completes, after being blown off by the solidifying globule air gun on vaporizer semi-finished product, it is being placed on drying in oven, is drying After product will carry out managing interior nitrogen flushing, nitrogen flushing air pressure: >=1.5MPa, time 5s, use bubble mould to protect when depositing, this The paint layer from surface that electrophoresis method is formed is firm, will not peel off, and electrophoresis efficiency is high, it should be noted that in the 9th step and the tenth step Linear speed be the moment rate-of flow through evaporator surface, its frequency can be measured by instrumentation；

11st step: spraying solidification, forms flat evaporation tube finished product, and this step includes twice dusting,

First being once to dust, this step is equipment spraying, the product in the tenth step is sent into electrostatic dusting room and sprays Powder, electrostatic high-pressure 70-90KV, flour extraction >=80%, and first to blow on surface positive and negative to product before this, one side is blown Time is not less than 5s, prevents the impurity such as product surface adhesive dust, granule, and the product after electrostatic spraying enters curing oven solidification, Solidification temperature: 185 ± 10 DEG C, linear speed 18-26HZ (hardening time 23～28min), this step is carried out twice, it is ensured that coating layer thickness ＜ 500 μm；The method can ensure that dusted completely in the surface of product and powder curing is on product, simultaneously powder spray Thickness is guaranteed；

Next to that secondary dusts, this step is hand spray, after the said goods is dried completely, is used by the straight tube on product Adding heat pipe to protect, re-use spray gun and carry out secondary and dust, only spray steel wire weld region during spraying, connecting tube, monolithic are curved Head does not dusts；This weld being primarily directed to evaporation tube with little steel wire that dusts, owing to being in junction, powder spraying apparatus cannot Spraying to, it is possible to by manually realizing, so combination by once dusting and secondary dusts makes product everywhere Can be sprayed-on, it is ensured that without dead angle,

12nd step: finished product energising test, make certified products, first allocate solution, according to solution tank size add go from Sub-water and sodium chloride are eventually adding a small amount of ethanolic phenolphthalein solution, detect tank liquor conductance scope 200 ± 30PPM, with 200PPM for Good, with TDS detection pen detection, in groove three diverse locations need to be detected by examination criteria respectively, and numerical value all meets above wanting Asking and can use, the most again the finished product in the 11st step is put into test trough, steel wire is totally immersed in solution, is not sprayed onto powder Place can not immerse in solution, is switched on power by tester, and out-put supply is set to 9V, is existed by the terminal clamp clamping on tester Joint one end of finished product, stands reading numerical values after 5s, and numerical value is certified products less than 1V, and certified products need, in drying in oven, to dry Dry temperature 100 ± 10 °, so can play a protective role to vaporizer itself in the refrigerator that humidity is bigger, strengthen it simultaneously Corrosion resistance, considerably increases service life；

13rd step: dress auxiliary, pressurize, uses nitrogen flushing rifle use >=1.5MPa drying nitrogen that qualified vaporizer is rushed nitrogen and removes Dirt 5s, is cleaned pipeline, overlaps 30mm white thermal shrinkable sleeve 5, to ensure that connecing direction length at solder joint to copper reaches at enlarging 10mm, overlaps 60mm white thermal shrinkable sleeve 5 at reducing, to ensure that connecing direction length at solder joint to copper reaches 10mm and band must be pricked On thermal shrinkable sleeve, and using heat gun to blow boiling hot fastening, thermal shrinkable sleeve ensures to reach 10mm about at solder joint, at the outer plug of necking end set, Put interior plug, workpiece two ends set rubber stopper at enlarging, be filled with the drying nitrogen of 0.2+0.02MPa, then fill temperature-sensitive on an evaporator Support and temperature detector, place pressurize in 24 hours, dwell pressure 0.2+0.02MPa in being finally inserted in bubble bags.

As shown in Figure 1, Figure 3 and Figure 4, plate evaporator, including coil pipe 2 and tinsel 1, coil pipe 2 is connected structure by multiple bend pipes 6 Become, and multiple bend pipe 6 is formed by repeatedly plain bending by a straight tube, is connected to import at the two ends of coil pipe 2 Pipe 7 and outlet 8, tinsel is fixedly connected on the tow sides of coil pipe, and described bend pipe includes first arc tube the 61, second circular arc Pipe the 64, first straight tube the 62, second straight tube 65 and inclined tube 63, the lower end of the first straight tube 62 is connected with one end of the first arc tube 61, Upper end is connected with one end of inclined tube 63, and the other end of inclined tube 63 and one end of the second arc tube 64 are connected, the second arc tube 64 The upper end of the other end and the second straight tube 65 is connected, and the lower end of the second straight tube is connected with the first arc tube on adjacent bend pipe, and first Straight tube and the second straight tube are parallel, and described first straight tube, the second arc tube and the second straight tube connect formation " 9 " character form structure.

In order to increase heat exchange area and improve heat exchange efficiency, tinsel 1 is provided with many and formation arranged in parallel Wire surface, takes up room in order to reduce and can install other workpiece, and the two ends in the middle part of wire surface are provided with breach, and this lacks Constitute installing space 9 between mouth and coil pipe, be provided with the temperature detector 10 being connected on coil pipe in installing space, can detect in real time The operative temperature of vaporizer.

In order to make product with compact structure, volume is moderate, by roundabout for outlet bottom the first arc tube, and goes out Mouth pipe is paralleled with the first arc tube, so more convenient when installing and maintenance changes, and saves much troubles.In order to protect Protect the connection end of product and be conveniently connected with other pipe fittings in refrigerator, outlet being arranged with reducing copper pipe 4, inlet tube overlaps It is provided with straight tube copper pipe 3, reducing copper pipe and straight tube copper pipe parallel.

Claims (10)

1. the manufacture method of plate evaporator, it is characterised in that: comprise the following steps,

The first step: blanking, chooses a Bundy tube and a steel wire and by automatic blanking machine blanking, and steel wire is cut by blanker again Become the little steel wire that many root lengths degree is consistent；

Second step: enlarging, carrys out enlarging by any one port of Bundy tube in the first step by pipe-expanding machine, and another port is by circular opening machine Carry out round mouth；

3rd step: bend pipe, is bent into the coil pipe of " 9 " font on bending machine by the Bundy tube in second step；

4th step: clean, uses ultrasonic equipment to be carried out the little steel wire in the first step；

5th step: welding resistance, use row silk frock by the little steel wire weld in the 4th step on the coil pipe of the 3rd step, it is ensured that adjacent little Spacing between steel wire is consistent；

6th step: rush limit point, exceeds the little steel wire of coil pipe outermost pipe, little steel wire two ends and coil pipe by punch press excision Center alignment；

7th step: silver soldering, is respectively welded copper pipe at the two ends of coil pipe, ensures that coil pipe is upright state and uses welding when Nitrogen is protected；

8th step: leak detection, is placed on the coil pipe in the 7th step at least 10s in pond of hunting leak, after having hunted leak, coil pipe two ends is put Dirt-proof boot, forms vaporizer semi-finished product；

9th step: surface pretreatment, detects and cleans vaporizer surface of semi-finished greasy dirt and impurity and be passivated at evaporator surface Form protecting film；

Tenth step: electrophoretic enamelling, drying, carries out painting on surface in the vaporizer semi-finished product in the 9th step are placed on electrophoresis liquid, After electrophoresis completes, it is being placed on drying in oven after being blown off by the solidifying globule air gun on vaporizer semi-finished product, the product after drying Will carry out managing interior nitrogen flushing to deposit；

Vaporizer tow sides in tenth step are carried out dusting and be placed on curing oven solidification, are formed by the 11st step: spraying solidification Flat evaporation tube finished product,

12nd step: finished product energising test, puts into test trough by the finished product in the 11st step, the steel on vaporizer the most again Silk is totally immersed in solution, and is not sprayed onto at powder and can not immerse in solution, is switched on power by tester, by the electricity on tester Pole chuck clamping, on the copper pipe joint of vaporizer, stands reading numerical values after 5s, numerical value less than standard value for certified products.

The manufacture method of plate evaporator the most according to claim 1, it is characterised in that: that cleans in the 4th step is concrete Method as follows, steel wire often cleans 10 times, and that is washed by first is discarded, and the first of pouring into washed by second washes use, by the What three roads were crossed pour second into washes interior use, ultrasonic the 3rd road of pouring into washed is crossed use, pours into new in ultrasonic equipment Cleanout fluid.

The manufacture method of plate evaporator the most according to claim 1, it is characterised in that: the 11st step is dusted and includes Following steps,

First being once to dust, first blow in surface positive and negative to vaporizer, removes evaporator surface adhesive dust, granule, One side gassing time is not less than 5s, then vaporizer is sent into electrostatic dusting room dusts, electrostatic high-pressure 70-90KV, flour extraction >=80%；

B. the vaporizer after above-mentioned electrostatic spraying is sent into curing oven solidification, solidification temperature: 185 ± 10 DEG C, linear speed 18-26HZ (hardening time 23～28min)；

C. step a and step b, evaporator surface coating layer thickness ＜ 500 μm it are repeated once；

Being the most finally that secondary dusts, the straight tube on vaporizer will dried in step c puts and adds heat pipe and protect, and re-uses spray Rifle carries out secondary and dusts, and only sprays steel wire weld region during spraying, and connecting tube, monolithic elbow do not dust.

The manufacture method of plate evaporator the most according to claim 1, it is characterised in that: described 12nd step detects Solution in groove is made up of water, deionized water, sodium chloride and ethanolic phenolphthalein solution, and the groove of any three diverse locations in groove Liquid conductance scope is 200 ± 30PPM.

The manufacture method of plate evaporator the most according to claim 1, it is characterised in that: after described 12nd step also Comprise the following steps,

13rd step: dress auxiliary, pressurize, overlaps thermal shrinkable sleeve, and at the outer plug of necking end set, puts at enlarging at enlarging and at reducing Interior plug, vaporizer two ends set rubber stopper, it is filled with drying nitrogen, then dress temperature-sensitive support and temperature detector on an evaporator, is finally inserted in Pressurize in 24 hours is placed in bubble bags.

6. plate evaporator, it is characterised in that: including coil pipe and tinsel, coil pipe is connected and composed by multiple bend pipes, and multiple Bend pipe is formed by repeatedly plain bending by a straight tube, is connected to inlet tube and outlet at the two ends of coil pipe, Tinsel is fixedly connected on the tow sides of coil pipe, described bend pipe include the first arc tube, the second arc tube, the first straight tube, Two straight tubes and inclined tube, the lower end of the first straight tube is connected with one end of the first arc tube, and upper end is connected with one end of inclined tube, inclined tube One end of the other end and the second arc tube is connected, and the other end of the second arc tube and the upper end of the second straight tube are connected, the second straight tube Lower end and the first arc tube on adjacent bend pipe be connected, the first straight tube and the second straight tube are parallel, described first straight tube, second Arc tube and the second straight tube connect formation " 9 " character form structure.

Plate evaporator the most according to claim 6, it is characterised in that: described tinsel is provided with many and is parallel to each other Arranging formation wire surface, the two ends in the middle part of wire surface are provided with breach, constitute installing space between this breach and coil pipe.

Plate evaporator the most according to claim 7, it is characterised in that: it is provided with in described installing space and is connected to coil pipe On temperature detector.

Plate evaporator the most according to claim 6, it is characterised in that: described outlet is roundabout at the bottom of the first arc tube Portion, and outlet and the first arc tube parallel.

Plate evaporator the most according to claim 9, it is characterised in that: it is arranged with reducing copper pipe on described outlet, Straight tube copper pipe, reducing copper pipe and straight tube copper pipe it is arranged with parallel on inlet tube.