KR100585863B1 - Evap0rator for refrigerator - Google Patents

Abstract

The present invention relates to a heat exchanger for a refrigerator, and the present invention has a plurality of fin plates stacked between the end plates on both sides of the cooling tube, and the fin plates are formed to have different lengths of the fin plates and end portions of the neighboring fin plates and the inlet side. Is arranged so as to be different on the horizontal line, and by forming a plurality of flow guides provided with a hole and a slit portion in each pin plate, it is easy to assemble differently the introduction pitch and the pull-out pitch of the pin plate The productivity is improved.

In addition, the inlet side pitch is relatively wider than the induction side pitch, so that the air flows smoothly, and as the slit portions of the flow guide portions are formed on each pin plate, the air hits the slit portion and becomes turbulent to contact the pin plate. As well as the area is widened, even if the flow direction of the air is changed by the implantation of the adjacent pin plate, the hole portion of the flow guide portion forms a flow passage, thereby smoothing the flow of air, thereby improving heat exchange efficiency.

Description

Heat exchanger for refrigerators {EVAP0RATOR FOR REFRIGERATOR}

1 is a perspective view schematically showing an example of a conventional refrigerator.

Figure 2 is a front view showing an example of a conventional evaporator for a refrigerator.

Figure 3 is a perspective view showing an example of the evaporator for a refrigerator of the present invention.

4 and 5 is a front view showing the arrangement of the pin plate in the refrigerator evaporator of the present invention.

Figure 6 is a schematic diagram showing the air flow for an example of the evaporator for a refrigerator of the present invention.

Figure 7 is a perspective view showing a modification of the pin plate in the refrigerator evaporator of the present invention.

8 and 9 is a schematic view showing the air flow for each modification of the pin plate of the evaporator for a refrigerator of the present invention.

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

11: end plate 12: pin plate

12a: flow guide 12a-1: hole

12a-2: Slit part 13: Refrigerant pipe

I: Implantation Clump

The present invention relates to a heat exchanger for a refrigerator, and more particularly, to a heat exchanger for a refrigerator, which is easy to assemble a fin plate and can widen the contact area between air and the fin plate.

Generally, a refrigeration cycle apparatus includes a compressor for compressing a refrigerant, a condensation heat exchanger for condensing the gas refrigerant compressed by the compressor into a liquid phase, an expansion mechanism for expanding the liquid refrigerant having passed through the condensation heat exchanger at low temperature and low pressure, and an expansion mechanism. It is composed of a heat exchanger for evaporating the liquid refrigerant back to the gas refrigerant.

Among these, the evaporation heat exchanger is installed in the indoor unit of the air conditioner or the cooling chamber of the refrigerator to generate cold air as it exchanges heat with the surrounding hot air, and when the evaporation heat exchanger is used in a refrigerator having a sub-zero operating condition, A large amount of moisture contained in the circulating air is formed on the surface of the evaporating heat exchanger to interfere with the flow of air. For this reason, the refrigerator is usually provided with a defrost heater for removing frost formed on the heat exchanger for evaporation.

1 is a schematic view showing a refrigerator equipped with a conventional heat exchanger for evaporation.

As shown in the drawing, a conventional refrigerator has a cooling chamber (unsigned) in communication with the cold air return flow path (unsigned) of the freezing chamber F and the refrigerating chamber R at the rear wall thereof, The evaporative heat exchanger (1) and the evaporative heat exchanger (1), which pass the hot air brought in through the cold air return passage and make it cool, draw the hot air and return the cold air to the freezer compartment (F) and the refrigerating compartment. The blowing fan 2 which discharges to (R) is provided.

The heat exchanger for evaporation, as shown in Figure 2, a plurality of fin plates stacked at equal intervals between a pair of end plates (1a) standing up at both ends and the end plate (1a) (fin plate) 1b and a refrigerant pipe 1c coupled through the end plate 1a and the plurality of fin plates 1b.

The end plate 1a is formed in the shape of a rectangular plate that is vertically long and vertical, and is thicker than the thickness of the fin plate 1b so that several through holes (not shown) are formed so that the refrigerant pipe 1c is inserted therethrough.

The pin plate 1b is formed in the shape of a rectangular plate with a long rectangular shape left and right to have the same width as that of the end plate 1a, and has a pitch different from that of the inlet side and the outlet side relative to the air flow direction. It is coupled to each of the refrigerant pipe (1c) so as to have a piece, and is coupled so that the pitch of the introduction side is formed wider than the pitch of the lead-out side.

The coolant tubes 1c are formed to have the same diameter and are arranged to have the same spacing from the inlet side to the outlet side of the air.

The process of circulating cold air in the refrigerator equipped with a conventional heat exchanger for evaporation as described above is as follows.

First, when the blower fan 2 is operated to discharge cold air into the freezing compartment F and the refrigerating compartment R, the cold air circulates through the respective chambers F and R to appropriately store the food stored therein. In this process, the heated air is brought into the cooling chamber through the cold air return passages provided in the chambers F and R, and is sucked into the blower fan 2, and the cold evaporation heat exchanger provided in the middle thereof. While passing through (1), it is changed back to cold air.

At this time, the hot air introduced through the cold air return flow path to the fin plate (1b) and the refrigerant pipe of the heat exchanger (1) for cooling a large amount of moisture absorbed while contacting the food of each chamber (F, R) ( The layer is formed on 1c) and then melted in the liquid phase by radiant heat or conduction heat applied from the defrost heater (not shown) during the defrosting operation, and then the defrosting water receiver (not shown) along the fin plate 1b and the refrigerant pipe 1c. It was to flow down.

However, despite the defrosting operation as described above, in a so-called abnormal excessive condition in which the refrigerator door is frequently opened or opened for a long time, a large amount of water is introduced into the refrigerator to provide a large amount of the heat exchanger 1 for evaporation. The frosting occurred, and in particular, a considerable amount of frosting occurred in the inlet portion of the air, and when severe, there was a fear that the flow of the evaporation heat exchanger 1 was significantly reduced by completely blocking the flow of air.

In view of this, in the conventional evaporation heat exchanger 1, as described above, the fin plate 1b of the heat exchanger is mounted in a single sheet, and the spacing between the fins of the inlet fin plate 1b is arranged wide, and the fin plate on the drawer side. The spacing between pins of (1b) is arranged relatively densely to minimize the blockage of the flow path on the inlet side, but this is not only complicated by the manufacturing process but also a lot of time in assembling each pin plate (1b). As a result, there was a problem in that the productivity was lowered while the manufacturing cost increased.

The present invention has been made in view of the above problems of the conventional evaporative heat exchanger of the refrigerator, stacking a plurality of fin plates, but easy to manufacture and assemble, while the spacing side of the air is wide and the spacing side is arranged relatively narrow It is an object of the present invention to provide a heat exchanger for a refrigerator.

In order to achieve the object according to the present invention, a pair of end plates disposed at both ends, a plurality of pin plates stacked between the end plate, and the refrigerant communicated through each other through the end plate and the plurality of pin plates In the refrigerator heat exchanger consisting of a tube, the fin plate is provided with a heat exchanger for the refrigerator, characterized in that the length is formed to be different from each other.

In addition, each of the fin plate is provided with a heat exchanger for a refrigerator, characterized in that a plurality of flow guide portion provided with a hole portion and a slit portion is formed.

Hereinafter, the refrigerator heat exchanger according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 3 is a perspective view showing an example of the refrigerator evaporator of the present invention, Figures 4 and 5 is a front view showing the arrangement of the pin plate in the refrigerator evaporator of the present invention, Figure 6 is an air for an example of the refrigerator evaporator of the present invention 7 is a perspective view showing a modification of the pin plate in the refrigerator evaporator of the present invention, Figures 8 and 9 is a schematic view showing the air flow for each modification of the pin plate of the refrigerator evaporator of the present invention. to be.

As shown therein, the heat exchanger 10 for evaporation according to the present invention includes a pair of end plates 11 standing up at both ends and a plurality of fins stacked at equal intervals between the end plates 11. It consists of a plate 12 and a refrigerant pipe 13 which communicates with each other through the end plate 11 and the plurality of fin plates 12.

The end plate 11 is formed in a rectangular plate shape, which is vertically long and vertical, is thicker than the thickness of the fin plate 12, and several through holes (unsigned) are formed so that the refrigerant pipe 13 is inserted therethrough.

Like the end plate 11, the pin plate 12 is formed in the shape of a rectangular plate that is vertically long and vertical, and its length is adjacent so that the arrangement at the inlet side and the arrangement at the outlet side have different pitches based on the air flow direction. It is formed differently from the other pin plate 12.

The pin plates 12 are arranged such that their respective leading ends coincide with each other while their respective leading ends are inconsistent with each other, as shown in FIG. 4, repeating in order from the longest to the shortest Or the lengths are arranged in order from the longest to the shortest, and the lengths are arranged in order from the shortest to the longest.

In addition, as shown in FIGS. 7 to 9, each of the pin plates 12 is provided with a plurality of flow guides 12 having a hole part 12a-1 and a slit part 12a-2 together. Each of the flow guides 12 has holes 12a-1 and 12a-1 formed on both upper and lower sides of the slit portion 12a-2, so that the flow guides 12a of the adjacent pin plate 12 are formed. May be disposed on the same horizontal line or on a different horizontal line from the flow guide portion 12a of the neighboring pin plate 12 or on the same horizontal line as the fin edge of the neighboring pin plate 12. It may be.

The refrigerant pipe 13 is formed to have the same diameter so that the number of penetrations through the respective fin plates 12 is different for each length of each fin plate 12 so as to have the same distance from the inlet side to the outlet side of the air. Are arranged.

In the drawing, reference numeral I denotes a lump of implantation.

The process of assembling the heat exchanger for a refrigerator according to the present invention as described above is as follows.

That is, the end plates 11 are positioned at both ends, and the plurality of pin plates 12 are each spaced apart from each other so that the length of the introduction side is different from each other between the end plates 11. Laminating, the end plate 11 and the pin plate 12 through the refrigerant pipe 13 in order to complete the assembly of the refrigerator heat exchanger.

In this way, while the end plate 11 and the pin plate 12 are assembled at one time, the interval between the pitches on the introduction side and the interval between the pitches on the lead-out side can be arranged differently from each other. Compared to the one-by-one assembly, the productivity is remarkably improved, and high manufacturing costs can be expected.

On the other hand, when the refrigerator heat exchanger of the present invention is equipped with a heat exchanger for evaporation in the refrigerator, the effects are as follows.

That is, the air returning after circulating through the freezer compartment F (shown in FIG. 1) and the refrigerating compartment (shown in FIG. 1) R of the refrigerator flows into the cooling chamber and passes through the evaporation heat exchanger 10 of the present invention. This cool air is distributed evenly to the freezer compartment (F) and the refrigerating chamber (R) again, so that the food stored in each compartment (F) (R) can be kept fresh.

At this time, the air returning to the cooling chamber contains a large amount of moisture, but this moisture may form on the surface of the heat exchanger 10 for evaporation, but may hinder the flow of air, as shown in FIG. 6. In the case where the lengths of) are different from each other, in particular, when the pitch between the fins of the portion corresponding to the introduction side is wide when the air flow is used, the contact area between the air at the introduction side and the evaporation heat exchanger 10 is narrow. Even if water is implanted on each pin plate 12, it is possible to prevent the air passage from being completely blocked, and as the air is evenly contacted from the inlet side to the outlet side, the degree of implantation is uniformly formed to a certain degree, so that the air is smooth. Can be flowed.

In addition, as shown in Figures 7 to 9, as the plurality of flow guides (12a) are formed in each of the pin plate 12, the air flows from the introduction side to the discharge side, each of the flow guide portion The turbulence is formed by hitting the incision surface of the slit portion 12a-2 of (12), and this air flows in a wide contact with the fin plate 12 while complexly flowing between the fin plates 12, so that heat exchange efficiency is improved. Is improved.

In addition, even though moisture in the air contacts and condenses on each of the pin plates 12 and melts down during defrosting operation, a plurality of small portions of the air guide 12a in the hole portions 12a-1 and the slit portions 12a-1 in advance. As the droplets are implanted, the size of the implant at the final edge is reduced, thereby preventing the pin-to-pin flow path from being completely blocked.

In addition, even if the flow direction of the air is distorted by the idea generated in the neighboring pin plate 12 so that the air can escape to the flow guide portion 12a of the neighboring pin plate 12 in the flow direction of the twisted air Since the hole portion 12a-1 is provided in advance, air flows smoothly from the introduction side to the lead-out side through the hole portion 12a-1.

The heat exchanger for a refrigerator according to the present invention forms a length of each fin plate differently, and arranges adjacent fin plates and end portions of the introduction side to be different on a horizontal line, and a plurality of pin plates are provided with holes and slits. By forming two flow guide parts, it is easy to assemble the introduction side pitch and the extraction side pitch of the pin plate differently from each other, thereby improving productivity.

In addition, the inlet side pitch is relatively wider than the induction side pitch so that the air flows smoothly, and as the slit portions of the flow guide portions are formed on each pin plate, the air collides with the slit portion and becomes turbulent to contact the pin plate. As well as the area is widened, even if the flow direction of the air is changed by the implantation of the adjacent pin plate, the hole portion of the flow guide portion forms a flow passage, thereby smoothing the flow of air, thereby improving heat exchange efficiency.

Claims (11)

In a heat exchanger for refrigerators comprising a pair of end plates disposed at both ends, a plurality of fin plates stacked between the end plates, and refrigerant pipes communicating with each other through the end plates and the plurality of fin plates, The fin plate is a heat exchanger for a refrigerator, characterized in that a plurality of flow guides are provided with a hole and a slit. The heat exchanger of claim 1, wherein the fin plates are arranged in different lengths from neighboring fin plates. The heat exchanger according to claim 1, wherein the fin plate is arranged such that one of the one ends thereof coincides with the other one neighboring tip while the other end thereof is arranged to be inconsistent with the other neighboring other leading end. . The refrigerator of claim 1, wherein the fin plate is arranged such that the number of refrigerant tubes passing through any one of the fin plates is inconsistent with the number of refrigerant tubes passing through the other fin plates adjacent to the fin plates. heat transmitter. 2. The heat exchanger of claim 1, wherein the fin plates are arranged repeatedly in order from the longest to the shortest. The refrigerator of claim 1, wherein the pin plates are arranged in order from the longest to the shortest, and are arranged repeatedly from the shortest to the longest. heat transmitter. delete The heat exchanger for a refrigerator according to claim 1, wherein the hole parts are formed to have a predetermined width on both upper and lower sides of the slit part. The heat exchanger of claim 1, wherein the flow guide part is disposed on the same horizontal line as the flow guide part of a neighboring fin plate. The heat exchanger of claim 1, wherein the flow guide part is disposed on a horizontal line different from the flow guide part of a neighboring fin plate. The heat exchanger of claim 1, wherein the flow guide part is disposed on the same horizontal line as a fin edge of a neighboring fin plate.

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