KR100539821B1 - Heat diffusion structure of core portion in refrigerator cabinet forming system and a method thereof - Google Patents

Abstract

The present invention relates to a core heat dissipation structure and a core heat dissipation method of a foam molding machine of a refrigerator cabinet, a support part supporting an outer surface of a refrigerator cabinet, a core part supporting an inner surface of a refrigerator cabinet, and an inner surface of the high temperature refrigerator cabinet. And a heat dissipation through-hole formed in the core portion to prevent the core portion from overheating by contacting with the resin, thereby preventing the temperature of the core portion of the foam molding machine of the refrigerator cabinet from becoming excessively high and efficiently dissipating heat from the core portion. Provided are a core heat dissipation structure and a core heat dissipation method of a foam molding machine of a refrigerator cabinet.

Foam molding machine, core part, heat radiation penetration hole, urethane pad of refrigerator cabinet

Description

Core heat dissipation structure and foam heat dissipation method of foam molding machine of refrigerator cabinet {HEAT DIFFUSION STRUCTURE OF CORE PORTION IN REFRIGERATOR CABINET FORMING SYSTEM AND A METHOD THEREOF}

1 is a perspective view showing the configuration of a foam molding machine of a refrigerator cabinet

2 is a temperature distribution diagram of the core part of FIG. 1 calculated by simulation;

Figure 3 is a perspective view of the core portion of Figure 1

Figure 4 is a schematic diagram of the heat dissipation structure of the core portion of the foam molding machine of the refrigerator cabinet according to an embodiment of the present invention

5 is a process flowchart of the foam molding machine of the refrigerator cabinet of FIG.

6 is a schematic diagram showing a heating state in the heating mechanism of FIG.

Figure 7 is a schematic view of the heat dissipation structure of the core portion of the foam molding machine of the refrigerator cabinet according to another embodiment of the present invention

** Description of symbols for the main parts of the drawing **

1: foam molding machine 10 of the refrigerator cabinet: base plate

20: support 21: front support plate

22: rear support plate 23: right support plate

24: seat support plate 25: top support plate

26: bottom support plate 30: core part

31: freezer compartment core 32: refrigerator compartment core

40: blower 41, 42: blower duct

50: oven insulation wall 100: urethane pad

200: heat dissipation through hole

The present invention relates to a core heat dissipation structure and a core heat dissipation method of a foam molding machine of a refrigerator cabinet, and more particularly, to a core part of a foam molding machine of a refrigerator cabinet that prevents the temperature of the core of the foam molding machine of the refrigerator cabinet from being excessively high. A heat dissipation structure and a core part heat dissipation method.

The refrigerator is for storing food at low temperature, and includes a cabinet for forming a storage space such as a refrigerator compartment or a freezer compartment for storing food, a door for opening and closing the refrigerator compartment and the freezer compartment, and a machine for keeping the stored food at a low temperature state. It consists of wealth.

Here, the cabinet is filled with a heat insulating material between the outer surface forming the outer shape and the inner surface forming the storage space to increase the cold effect. In recent years, light and excellent insulation polyurethane is used as the material of the heat insulating material, the polyurethane foam liquid is injected between the inner surface and the outer surface of the cabinet in the assembled state by heating and foaming to fill the insulation inside the cabinet.

In order for the polyurethane foam to be foamed by a chemical reaction, the temperature around the polyurethane foam must be maintained at a range of 45 ° C. ± 5 ° C., which is higher than room temperature. Therefore, the heating process for heating the foam molding machine equipped with a cabinet is accompanied. do. However, the heating process is generally performed by heating the foam molding machine from the outside, and during the heating process, the core portion that supports the inside of the foam molding machine, that is, the inner surface of the refrigerator cabinet, is closed compared to the outer surface of the refrigerator cabinet during the heating process. Therefore, when the foam cabinet of the refrigerator cabinet is operated for a long time to produce the refrigerator cabinet, relatively more heat is accumulated, so that the polyurethane foam is not evenly filled inside the refrigerator cabinet during the foaming process or the filling density is uneven. Therefore, a problem occurs that the refrigeration and freezing efficiency of the refrigerator decreases.

In particular, in the foaming process of the refrigerator cabinet divided into a freezer compartment and a refrigerating compartment, the space between the freezer compartment and the refrigerating compartment is narrow and located at a corner where external cold air is hard to enter. As shown in FIG. 2, the temperature rises up to 61.37 ° C. Done. In addition, the ABS resin used as a material of the inner surface of the refrigerator cabinet also causes a problem that shrinkage deformation occurs when the temperature rises excessively. Therefore, the necessity of effectively releasing heat accumulated in the core portion in order to perform smooth foaming is urgently required in view of the performance and reliability of the foam molding machine of the refrigerator cabinet.

The present invention has been made to solve the problems of the prior art as described above, in order to prevent the temperature of the core portion of the foam molding machine of the refrigerator cabinet from excessively high, bypassing the heat transfer path to the core portion or efficient heat from the core portion. An object of the present invention is to provide a core heat dissipation structure and a core heat dissipation method of a foam molding machine of a refrigerator cabinet that can be discharged to the refrigerator.

In order to achieve the above object, the present invention provides a foam molding machine for a refrigerator cabinet having a support part for supporting an outer surface of a refrigerator cabinet, and a core part for supporting an inner surface of a refrigerator cabinet, the inner surface of the refrigerator cabinet having a high temperature. It provides a heat dissipation structure of the core portion of the foam molding machine of the refrigerator cabinet, comprising a heat dissipation through-hole formed in the core portion to prevent the core portion from overheating by contact.

This is to allow heat to be efficiently discharged from the core part in order to prevent the temperature of the core part of the foam molding machine of the refrigerator cabinet from being excessively high.

Here, the heat dissipation through-hole is formed in plurality, the diameter is 5mm to 10mm, the interval between the heat dissipation through-hole is preferably 30mm to 50mm.

And, it is effective that the core portion is formed in plural, and the heat dissipation through hole is formed only between adjacent core portions.

On the other hand, the present invention is a foam molding machine of a refrigerator cabinet having a support portion for supporting the outer surface of the refrigerator cabinet and a core portion for supporting the inner surface of the refrigerator cabinet, wherein the core portion is overheated by contacting the inner surface of the refrigerator cabinet at a high temperature. It provides a heat dissipation structure of the core portion of the foam molding machine of the refrigerator cabinet comprising a heat insulating material formed on the contact surface between the core portion and the inner surface of the cabinet to prevent.

In order to prevent the temperature of the core portion of the foam molding machine of the refrigerator cabinet from becoming excessively high, the heat accumulated in a specific portion of the refrigerator cabinet is diverted to an area where heat exchange is actively performed, thereby efficiently dissipating heat and preventing the core portion from overheating. For sake.

In addition, the heat insulating material may be formed of urethane, and may be formed by laminating to increase heat transfer resistance between layers of the urethane pad.

In addition, the heat insulating material is effective that the thickness is formed from 2mm to 8mm. This is to effectively block heat between adjacent core portions and to prevent deformation due to foaming pressure.

The core part may be formed in plural, and the heat insulating material may be formed only between adjacent core parts.

On the other hand, according to another field of the invention, in the method of heat dissipating the core portion of the foam molding machine of the refrigerator cabinet having a core portion for supporting the inner surface of the refrigerator cabinet, the core portion is prevented from overheating in contact with the inner surface of the high-temperature refrigerator cabinet It provides a heat dissipation through-hole penetrating the core portion to discharge the heat from the refrigerator cabinet to the outside to provide a heat dissipation method of the core portion of the foam molding machine of the refrigerator cabinet.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the configuration of a foam molding machine of a refrigerator cabinet, FIG. 3 is a perspective view of the core part of FIG. 1, and FIG. 4 is a schematic view of a heat dissipation structure of a core part of the foam molding machine of a refrigerator cabinet according to an embodiment of the present invention. .

As shown in the figure, the foam molding machine 1 of the refrigerator cabinet seals the base plate 10 supporting the entire load and the top, bottom, left, right, front and back in a state where the refrigerator cabinet is inserted. And a support 20 formed to withstand a predetermined pressure, a core 30 formed of ABS resin in the shape of the inner surface of the cabinet, and an external cold wind to prevent the core 30 from being overheated. It is configured to include a blower 40 to.

The base plate 10 includes a reinforcing material 13 formed between the upper plate 11 and the lower plate 12 and the upper plate 11 and the lower plate 12 so as to support most supports of the foam molding machine 1 of the refrigerator cabinet. And the fork insertion hole 14 between the reinforcing material 13 into which the fork of the forklift truck is inserted so as to easily transport the foam molding machine 1 of the refrigerator cabinet to the forklift truck, and the support 20 is rotated by the hinge mechanism 15a. It is provided with a plurality of hinge portions 15 formed on the top plate 11 to be opened and closed.

The support part 20 is formed to seal the refrigerator cabinet so as to withstand the pressure that the foaming liquid is foamed in a state in which the refrigerator cabinet is installed to surround the core part 30, and is formed to have sufficient rigidity before, after, left and right support plates 21, 22, 23 and 24, a top support plate 25 formed to seal the top surface of the cabinet by the rear support plate 22 and the hinge mechanism, and a bottom support plate integrally formed with the core part 30 to form a bottom surface ( 26).

Here, the front, rear, left and right support plates (21, 22, 23, 24) is operated to open and fold so that the cabinet can be inserted, out by the hinge portion (15).

The core part 30 has a refrigerator compartment core 31 formed of an aluminum material having excellent thermal conductivity as the inner surface shape of the refrigerating compartment of the cabinet so as to seat the cabinet on the foam molding machine 1 of the refrigerator cabinet, and the inner surface shape of the freezer compartment of the cabinet. The freezer compartment core 32 formed of aluminum material serves to maintain the shape of the inner surface of the refrigerator cabinet from the foaming pressure generated when the foaming liquid of polyurethane is foamed.

Here, in the process of heating the polyurethane foam to the foaming reaction temperature range, a large amount of heat is accumulated between the refrigerating chamber core 31 and the freezing chamber core 32 having a sealed structure, so that the heat discharge is excessively high temperature. In order to prevent the retardation, the heat accumulated in the polyurethane foaming liquid by covering the urethane pad 100 having a low thermal conductivity and acting as a heat dissipating material on the outer surface between the refrigerating chamber core 31 and the freezing chamber core 32 By bypassing the core portion 30 around the urethane pad 100 to be quickly released to the outside. On the other hand, in order to increase the heat transfer resistance urethane pad 100 may be formed by laminating.

At this time, the thickness of the urethane pad 100 is preferably 5mm ± 3mm. If the thickness of the urethane pad 100 is too thin, it is difficult to effectively block heat between the refrigerating compartment core 31 and the freezer compartment core 32, and if the thickness of the urethane pad 100 is too thick, the urethane pad ( 100) is deformed.

The blower 40 blows cold air from the outside blower duct 41 to prevent the core unit 30 from overheating when the outside is heated to foam the foam liquid injected into the cabinet. It is formed to forcibly radiate the core portion 30 by injecting through the duct 42. At this time, it is preferable to arrange the position of the blower duct 42 inside the air injecting cold air in the center of the core part 30, but due to the limitation between the blow pressure and the interference between the structure of the bottom support plate 26. Blowing ducts 42 are positioned at both end portions 33 of the core portion 30.

The process of foaming using the foam molding machine 1 of the refrigerator cabinet configured as described above, as shown in Figure 5, the foam molding machine 1 of the refrigerator cabinet rides along the conveyor belt 51 in the direction of the arrow The refrigerator cabinet is foamed through the heating zone. In more detail, in the step indicated by the reference P1, the upper support plate 25 is rotated and opened by the hinge portion 27 with respect to the rear support plate 22, and again before, after, left and right support plates 21, 22. , 23 and 24 are rotated with the hinge portion 15 with respect to the base plate 10 to be opened. Then, the refrigerator cabinet in which the foaming is completed in the refrigerator cabinet by one rotation in the direction of the arrow of FIG. 5 is separated in step P2, and the core part 30 formed in the shape of the inner surface of the refrigerator cabinet not foamed in step P3. ), And close each of the supporting plates (21, 22, 23, 24, 25) again to seal the refrigerator cabinet.

Then, after the foaming liquid is injected through the foaming liquid inlet 25a of the foaming molding machine 1 of the refrigerator cabinet, the foaming molding machine 1 of the refrigerator cabinet enters the hatched B and C heating regions as heating regions. As shown in Fig. 6, the foam molding machine 1 of the refrigerator cabinet in the heat insulating wall 50 of the oven, which is a heating mechanism, is allowed to pass through the heating zone while heat is applied to each support 20 by an external heater. do. In this process, the air is blown to the inner surface of the core part 30 by the blower 40 to promote heat dissipation of the core part 30, and between the refrigerator compartment core 31 and the freezer compartment core 32 having a sealed structure. By forming the urethane pad 100 having a heat dissipating agent, the heat accumulated in the polyurethane foam liquid bypasses the core portion 30 around the urethane pad 100 so as to be released to the portion 33 where heat exchange is actively performed. Allow heat release to occur quickly. This is because the blowing duct 42 through the blower 40 injects cold air around both ends 33 of the core portion 30. Therefore, the urethane pad 100 of the core part 30 induces heat flow to the portion 33 where heat exchange is actively performed, so that heat is not accumulated between the refrigerating chamber core 31 and the freezing chamber core 32.

Therefore, the core part 30 supporting the inner surface of the refrigerator cabinet is closed compared to the outer surface of the refrigerator cabinet, and thus, the urethane pad 100 operates the foam molding machine of the refrigerator cabinet for a long time to produce the refrigerator cabinet. Even if the temperature between the core portion 30 and the support portion 20 is kept similar, the polyurethane foam can be evenly filled in the inside of the refrigerator cabinet.

Figure 7 is a schematic diagram of the heat dissipation structure of the core of the foam molding machine of the refrigerator cabinet according to another embodiment of the present invention, another embodiment of the present invention is particularly sealed in the process of heating the polyurethane foam to the foaming reaction temperature range The heat dissipation through hole 200 allows the cold wind through the blow duct 42 to directly contact the refrigerator cabinet in the region between the refrigerator compartment core 31 and the freezer compartment core 32, where heat is accumulated and thus becomes excessively high due to heat accumulation. ) To form.

That is, the heat accumulated between the refrigerating chamber core 31 and the freezing chamber core 32 is provided through the heat dissipation through-hole 200 having the heat dissipation through-hole 200 having a diameter of 10 mm at intervals d1 and d2 of 30 mm. In direct contact with the cold wind, it is released to the outside by convective heat transfer between the refrigerator cabinet and the external cold air. At this time, the blower duct 42 for injecting cold air into the back surface of the core part 30 injects cold wind only at both ends 33 of the core part 30 and between the refrigerating chamber core 31 and the freezer compartment core 32. In spite of not injecting enough cold air into the refrigerator, heat exchange with the cold air occurs directly through the heat dissipation through hole 200 to heat the refrigerator cabinet, thereby dissipating heat between the refrigerator compartment core 31 and the freezer compartment core 32. The through hole 200 is discharged to the outside more effectively than when it is not formed.

Here, the distance (d1, d2) between the possible heat dissipation through-hole 200 is small, the diameter of the heat dissipation through-hole 200 is preferably larger in terms of heat transfer, but the diameter of the heat dissipation through-hole 200 exceeds 10mm In this case, since there is a possibility that the heat dissipation through-hole 200 is formed on the inner surface of the refrigerator cabinet, the diameter of the heat dissipation through-hole 200 is preferably 5 mm to 10 mm, and the interval d1, If the d2) is too small, the mechanical strength of the core part 30 may be a problem, and thus, it may not be able to support the foaming pressure. Therefore, the spaces d1 and d2 between the heat dissipation through holes 200 may be 30 mm to 50 mm. .

Meanwhile, as an embodiment of the present invention, a refrigerator cabinet having a single door and a freezer compartment and a refrigerating compartment has been described as an example. However, the present invention is not limited thereto, and the core unit 30 may be formed according to the shape of various refrigerator cabinets. Is to cover all categories used as means to prevent excessive accumulation of heat between adjacent and adjacent to increase the defective rate of the foaming process.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

As described above, according to the present invention, the support portion for supporting the outer surface of the refrigerator cabinet, the core portion for supporting the inner surface of the refrigerator cabinet, the contact with the inner surface of the hot refrigerator cabinet to prevent the core portion from overheating By including heat dissipation through-holes formed in the core portion, the core portion heat dissipation structure of the foam molding machine of the refrigerator cabinet which can prevent the temperature of the core portion of the foam molding machine of the refrigerator cabinet from being excessively increased and efficiently discharge heat from the core portion. And a core heat dissipation method.

The present invention can maintain the temperature of the core portion of the foam molding machine of the refrigerator cabinet within a certain range, by forming a foaming agent evenly and uniformly in the interior of the refrigerator cabinet, it is possible to manufacture a refrigerator having reliability and high refrigeration, freezing efficiency Will be.

Claims (10)

In the foam molding machine of the refrigerator cabinet having a support portion for supporting the outer surface of the refrigerator cabinet, and a core portion for supporting the inner surface of the refrigerator cabinet, And a heat dissipation through-hole formed in the core portion to prevent the core portion from being overheated by contacting an inner surface of the refrigerator cabinet at a high temperature. The method of claim 1, The heat dissipation through-hole is a heat dissipation structure of the core of the foam molding machine of the refrigerator cabinet, characterized in that formed in plurality. The method of claim 2, The heat dissipation through-hole has a diameter of 5mm to 10mm core part heat dissipation structure of the foam molding machine of the refrigerator cabinet. The method of claim 2, The heat dissipation structure of the core part of the foam molding machine of the refrigerator cabinet is characterized in that the interval between the heat dissipation through hole is 30mm to 50mm. The method of claim 1, The core portion is formed in plurality, The heat dissipation through-hole is a heat dissipation structure of the core portion of the foam molding machine of the refrigerator cabinet, characterized in that formed only between the adjacent core portion. In the foam molding machine of the refrigerator cabinet having a support portion for supporting the outer surface of the refrigerator cabinet, and a core portion for supporting the inner surface of the refrigerator cabinet, The heat dissipation structure of the core part of the foam molding machine of the refrigerator cabinet, comprising a heat insulating material formed on the contact surface between the core part and the inner surface of the cabinet to prevent the core part from overheating by contacting the inner surface of the refrigerator cabinet of high temperature. . The method of claim 6, The heat insulating material is a heat dissipation structure of the core part of the foam molding machine of the refrigerator cabinet, characterized in that formed of urethane. The method according to claim 6 or 7, The heat insulation structure of the core portion of the foam molding machine of the refrigerator cabinet, characterized in that the insulating material is formed by laminating. The method of claim 8, The heat insulating material is a heat dissipation structure of the core part of the foam molding machine of the refrigerator cabinet, characterized in that formed in a thickness of 2mm to 8mm. The method of claim 6, The core portion is formed in plurality, The heat insulation of the core portion of the foam molding machine of the refrigerator cabinet, characterized in that the insulation is formed only between the adjacent core portion.

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