CN104001803A - Evaporator molding equipment and method thereof - Google Patents

Abstract

Evaporator molding equipment comprises an upper mould and a lower mould, and the upper mould is driven by an air cylinder or an oil hydraulic cylinder; the lower mould comprises a lower mould fixed plate, a lower mould movable plate, a plurality of modules and an oblique block. The lower mould movable plate is located above the lower mould fixed plate, an elastic element is further arranged between the lower mould fixed plate and the lower mould movable plate, the elastic element jacks the lower mould movable plate up, the modules are arranged above the lower mould movable plate, the lower mould fixed plate and the lower mould movable plate are respectively provided with a vertically through strip-shaped slot, the lower end of the oblique block is fixed to the strip-shaped slot of the lower mould fixed plate, the upper end of the oblique block penetrates through the strip-shaped slot of the lower mould movable plate and is located between the adjacent modules, each module comprises a left module and a right module, the single side of each left module and the single side of the corresponding right module are respectively provided with an oblique plane matched with the upper end of the oblique block, a sharp corner is arranged inwards at the top end on the inner side of each pair of left module and right module, and a spring is further arranged between each left module and the corresponding right module. By means of the evaporator molding equipment, an evaporating pipe and a heat transfer plate can be assembled in place rapidly and conveniently, and most of the pipe wall of the evaporating pipe is tightly wrapped in a slot of the heat transfer plate.

Description

Evaporator forming equipment and forming method thereof

technical field

The invention relates to a mold, in particular to an evaporator forming device and a forming method thereof.

Background technique

The evaporator is an essential heat exchange component in the refrigeration system of the refrigerator, and it mainly plays the role of heat exchange. The heat exchange efficiency of the evaporator directly affects the refrigeration efficiency of the refrigerator. Therefore, the industry has been looking for a solution to improve the heat exchange efficiency of the evaporator. For the existing plate-tube refrigerator evaporator, viscose or glued aluminum foil is often used to fix the serpentine evaporation tube on the heat transfer plate. Since the evaporator tube is a circular tube, its contact with the heat transfer plate is linear. Although the aluminum foil with adhesive covers part of the tube wall and the surface of the heat transfer plate, it still cannot effectively improve the contact between the circular evaporator tube and the heat transfer plate. A small problem. In order to increase the contact area between the heat transfer plate and the evaporator tube, some heat exchanger manufacturers punch out S-shaped tube grooves on the heat transfer plate, and then put the evaporator tube into the groove. The hot plate mold is expensive, and the contact area between the evaporation tube and the tank is only about 50%, so the heat exchange effect is still difficult to achieve an ideal state.

Contents of the invention

The object of the present invention is to provide an evaporator molding device and its molding method that can conveniently and quickly assemble the evaporation tube and the heat transfer plate in place, so that most of the tube wall of the evaporation tube is tightly wrapped in the groove of the heat transfer plate , to overcome the deficiencies of the prior art.

The object of the present invention is achieved in the following way: an evaporator molding device, comprising an upper die and a lower die, characterized in that the lower die includes a lower die fixed plate, a lower die movable plate, a module set and an inclined block, and the lower die movable plate is located at Above the fixed plate of the lower die, there is an elastic element between the fixed plate of the lower die and the movable plate of the lower die. The elastic element lifts the movable plate of the lower die to separate the movable plate of the lower die from the fixed plate of the lower die. On the top of the plate, there is a strip groove running through the upper and lower mold fixed plate and the lower mold movable plate, the lower end of the inclined block is fixed in the strip groove of the lower mold fixed plate, and the upper end of the inclined block passes through the strip groove of the lower mold movable plate And between adjacent modules, the modules are divided into a left module and a right module, both sides of the left module and the right module have slopes that match the inclined blocks, and the relative positions of the top of the left module and the right module form an inward Sharp corner, also be provided with spring between described left module and right module. When using the mould, put the evaporating tube on the heat transfer plate with round ribs, and then place it on the lower mold plate, start the equipment, the upper mold moves downward, and the lower mold movable plate also moves downward under the action of the upper mold pressure. Moving down, under the action of the inclined block, the left module and the right module are close to each other, and the opening of the round rib of the heat transfer plate is compressed inward, so that the heat transfer plate wraps the evaporation tube and completes the processing.

Preferably, pads can also be provided under the lower mold frame, so as to adapt to pressure equipment of different heights.

In particular, the upper mold includes an upper mold frame and a plate-shaped upper template.

In particular, the moving plate of the lower die includes a stripper plate and a lower template, and the lower template is fixed above the stripper plate.

In particular, the lower mold fixed plate includes a lower mold frame and a fixed plate, and the fixed plate is fixed on the lower mold frame.

In particular, an arc surface is provided below the sharp corner, and the curvature of the arc surface matches the outer circle of the evaporation tube.

Preferably, the elastic element is a return spring.

A method for forming an evaporator, comprising the steps of:

S1) Put the heat transfer plate with the groove on the moving plate of the lower mold, and place the groove between the left module and the right module of each pair of modules, and put the middle straight pipe section of the evaporation tube into the heat transfer plate 21 in the groove and organize;

S2) The air cylinder or hydraulic cylinder drives the upper die downward, and the upper die presses against the heat transfer plate;

S3) The upper mold continues to move downward, the heat transfer plate and the movable plate of the lower mold press the fixed plate of the lower mold, the inclined block rises relative to the left and right modules, and pushes the left and right modules outward. The corners on both sides of the groove are squeezed and deformed to the evaporation tube, and the groove is clamped on the outer wall of the evaporation tube;

S4) The air cylinder or hydraulic cylinder drives the upper mold upward, the elastic element holds up the moving plate of the lower mold, and the spring between the left module and the right module pushes the left and right modules toward the inclined block, so that the left and right modules of each pair of modules separate; evaporator processing is complete.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

The evaporator molding die of the present invention can clamp the installation groove of the heat transfer plate to the outer wall of the evaporation tube, make the evaporation tube fully contact with the heat transfer plate, and form an “Ω”-shaped installation groove cross-sectional structure, so that the evaporation tube and the heat transfer plate The contact area is greater than 70% of the outer wall area of the heat exchange tube. Thus, the heat dissipation area is greatly increased, and the heat exchange efficiency is significantly improved.

The mold is equipped with multiple sets of modules, and each set of modules is equipped with a straight section of the S-shaped evaporation tube on the left and right sides, and the left and right modules are squeezed toward the direction of the evaporation tube by using the inclined block, so that the installation groove of the heat transfer plate is pressed against on the circular evaporation tube. The mold structure is scientific and reasonable, the molding process quality is high, the molding speed is fast, and the production efficiency is high.

Description of drawings

Figure 1 is a top view of the lower mold of the evaporator molding equipment.

Figure 2 is a schematic diagram of the structure of the upper and lower molds of the evaporator molding equipment.

FIG. 3 is an enlarged view of part A of FIG. 2 .

Figure 4 is a schematic diagram of the structure of the evaporator.

FIG. 5 is a side view of FIG. 4 .

FIG. 6 is an enlarged view of part B of FIG. 5 .

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Referring to Fig. 1 to Fig. 3, the present invention provides an evaporator forming equipment, which includes an upper mold 1 and a lower mold 2, the lower mold includes a lower mold fixed plate, a lower mold movable plate, a module and an inclined block, and the lower mold movable plate is located at Above the fixed plate of the lower die, there is an elastic element between the fixed plate of the lower die and the movable plate of the lower die. The elastic element lifts the movable plate of the lower die to separate the movable plate of the lower die from the fixed plate of the lower die. The movable plate of the lower die can be pushed down to press against the fixed plate of the lower die. Upper die 1 includes upper die frame 11 and a plate-shaped upper template 12, lower die 2 includes lower die frame 16, fixed plate 15, stripper plate 14, inclined block 51 and lower template 13, and lower die frame 16 is at the lowest position of the mould. Below, the top of the lower mold frame 16 is fixed with a fixed plate 15, and the stripper plate 14 is installed above the fixed plate 15, and a return spring 52 is also provided between the fixed plate 15 and the stripped plate 14, the fixed plate 15 and the stripped plate 14 There are strip-shaped grooves 53 running through the top and bottom, and the lower end of the inclined block 51 penetrates into the fixed plate 15 through the strip-shaped groove 53 of the stripper plate 14 and is fixed on the fixed plate 15. The lower formwork 13 is installed above the stripper plate 14. The lower formwork 13 is composed of side frames 38 and several groups of modules 31. The upper end of the inclined block 51 is between two adjacent groups of modules 31. Each group of modules 31 is divided into A left module 34 and a right module 33, left module 34 and right module 33 opposite sides all have the inclined-plane 36 that cooperates with oblique bar, be provided with spring 32 between left module 34 and right module 33, left module 34 and right module The opposite positions of the tops of the modules 33 form inward sharp corners 35 , and an arc surface 39 is provided below the sharp corners 35 , the arc of the arc surface 39 matches the outer circle of the evaporation tube.

Referring to Figures 4-6, an evaporator molded by the evaporator molding die of the present invention includes a heat transfer plate 21 and an S-shaped winding evaporation tube 22, the heat transfer plate is provided with a mounting groove, and the Part of the tube section of the evaporation tube is embedded in the installation groove of the heat transfer plate. The depth of the installation groove is suitable for the diameter of the evaporation tube. The cross-sectional shape of the installation groove is "Ω" shape, so that the evaporation tube is The arc length wrapped by the inner wall is more than 270°. As shown in the figure, the evaporating tube of the refrigerator is an S-shaped coil, the middle part of which is combined with the heat transfer plate. There are installation grooves on the heat transfer plate. The bottom of the groove is semicircular, the width of the upper opening of the groove is about the diameter of the evaporation tube, and the depth of the groove is slightly larger than the diameter of the evaporation tube. After the heat transfer plate is preliminarily processed, the evaporator tube is inserted into the installation groove, and then processed by the evaporator molding die of the present invention, the installation groove of the heat transfer plate is clamped to the outer wall of the evaporator tube, and the upper opening of the groove is narrowed toward the middle to form a For the acute angle 23, the cross-section structure of the "Ω" shape of the installation groove is formed, so that the evaporation tube and the heat transfer plate are in close contact and the contact area is much higher than that of the existing refrigerator tube-plate heat exchanger, thereby greatly increasing the heat dissipation area and significantly improving heat transfer efficiency.

Before using the mould, first stamp multiple parallel grooves on the heat transfer plate 21, the bottom of the grooves is suitable for the outer diameter of the evaporation tube, the depth of the groove is slightly higher than the diameter of the evaporation tube, and then the middle of the evaporation tube 22 is straight Put the pipe section into the groove of the heat transfer plate 21, and then place it on the lower template 13 (see Figure 3), start the equipment, the upper mold 1 presses down on the heat transfer plate, and continues to move downward, the lower template 13 And the stripper plate 14 also moves downward under the action of the pressure of the upper mold 1. Since the slanting bar 51 is fixed and stationary, the inclined surfaces 36 on the left module 34 and the right module 33 on both sides of the slanting bar 51 are moved along the peak of the slanting bar 51. The inclined plane moves downward, and the left module 34 and the right module 33 overcome the active force of the spring 32 and slide in opposite directions respectively. The sharp corner 35 of the right module 33 is evenly pressed towards the direction of the evaporating tube, and the opening of the groove of the heat transfer plate 21 is compressed inward, so that the heat transfer plate wraps the evaporating tube 22, the installation groove clamps the outer wall of the evaporating tube, and the upper part of the groove opens Narrow toward the middle to form a pair of acute angles 23, forming an "Ω"-shaped cross-sectional structure of the installation groove (see Figure 6 for the shape). After the evaporator finishes processing, the upper die moves upwards, and the stripping plate 14 returns to its original position under the action of the return spring 52 . The left module 34 and the right module 33 return to their original positions outwards under the action of the spring 32, and then the processed evaporator is taken out, that is, the whole operation movement is completed.

Claims (8)

1. A kind of evaporator forming equipment, comprising upper mold and lower mold, it is characterized in that: described upper mold is driven by air cylinder or hydraulic cylinder; Described lower mold comprises lower mold fixed plate, lower mold moving plate, several modules And the inclined block, the movable plate of the lower die is located above the fixed plate of the lower die, and there is an elastic element between the fixed plate of the lower die and the movable plate of the lower die. The elastic element supports the movable plate of the lower die, and several modules are arranged on the movable plate of the lower die. Above, the fixed plate of the lower die and the moving plate of the lower die are also provided with a strip-shaped groove that runs through the upper and lower sides. The lower end of the inclined block is fixed in the strip-shaped groove of the fixed plate of the lower die. Located between adjacent modules, the modules are divided into left modules and right modules, and the single side of the left module and the right module is provided with a slope that matches the upper end of the inclined block, and each pair of left modules and right modules Sharp corners are arranged inwardly at the top of the inner side, and a spring is also arranged between the left module and the right module. 2. The evaporator forming equipment according to claim 1, characterized in that: a cushion block can be provided under the lower mold frame. 3. The evaporator molding device according to claim 1, wherein the upper mold comprises an upper mold base and a plate-shaped upper template. 4. The evaporator molding device according to claim 1, wherein the moving plate of the lower die includes a stripper plate and a lower mold plate, and the lower mold plate is fixed above the stripper plate. 5. The evaporator molding device according to claim 1, wherein the fixed plate of the lower mold comprises a lower mold frame and a fixed plate, and the fixed plate is fixed on the lower mold frame. 6. The evaporator forming device according to claim 1, characterized in that: an arc surface is provided below the sharp corner, and the arc of the arc surface matches the outer circle of the evaporation tube. 7. The evaporator molding device according to claim 1, wherein the elastic element is a return spring. 8. The molding method of evaporator molding equipment according to claim 1, characterized in that it comprises the following steps: S1) Put the heat transfer plate with the groove on the moving plate of the lower mold, and place the groove between the left module and the right module of each pair of modules, and put the middle straight pipe section of the evaporation tube into the heat transfer plate 21 in the groove and organize; S2) The air cylinder or hydraulic cylinder drives the upper die downward, and the upper die presses against the heat transfer plate; S3) The upper mold continues to move downward, the heat transfer plate and the movable plate of the lower mold press the fixed plate of the lower mold, the inclined block rises relative to the left and right modules, and pushes the left and right modules outward, and the inner top corners of the left and right modules push the heat transfer plate The corners on both sides of the groove are squeezed and deformed to the evaporation tube, and the groove is clamped on the outer wall of the evaporation tube; S4) The air cylinder or hydraulic cylinder drives the upper mold upward, the elastic element holds up the moving plate of the lower mold, and the spring between the left module and the right module pushes the left and right modules toward the inclined block, so that the left and right modules of each pair of modules separate; evaporator processing is complete.