KR100350947B1 - Heat exchanger - Google Patents

Abstract

An object of the present invention is to provide a heat exchanger capable of improving heat exchange performance and improving productivity by excluding a connection process of a refrigerant pipe.

The present invention, the front and rear extruded tube rows (1,2) sharing the heat transfer fins (3), both side plates (41, 42) reinforcing both of them, and the header of the top of the extruded tube row is inserted (51) and an upper header pipe (5) consisting of a tank (52) joined to the header, and a header (61) into which the lower end of the row of extruded tubes is inserted, and a lower header consisting of a tank (62) joined to the header. It comprises a pipe (6). The center of the upper header pipe 5 is blocked by a baffle 55, and the lower tank 62 is divided into upper and lower flow paths 621 and 622. The upper flow path is divided into front and rear flow paths 624 and 625, and the center of the rear flow path is blocked by a baffle 65. On the left side of the lower tank, a refrigerant inlet 631 and a refrigerant discharge port 632 communicating with the rear flow path and the lower flow path are formed in turn, and the refrigerant discharge hole 633 and the refrigerant communicating with the lower flow path communicated with the rear flow path on the right side of the lower tank. Inlet holes 634 are formed in sequence. The right side of the lower tank is joined to the side connection tank 66 including the refrigerant discharge hole and the refrigerant inlet hole.

Description

Heat exchanger {HEAT EXCHANGER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger constituting an air conditioner for an automobile, and more particularly, to a heat exchanger capable of not only reducing aeration resistance but also improving heat exchange performance and making it compact.

In general, the heat exchanger may be divided into two types: a laminated plate and a fin type heat exchanger and a serpentine type heat exchanger.

The former heat exchanger is formed by alternately stacking flat tubes and heating fins in which two plates formed at the top or the bottom of which an embossing bead for turbulent flow is formed on the inner surface and a hole cup forming a refrigerant flow path are joined to each other. It is done. The heat exchanger has a low pressure resistance at the junction of the plates, and the heat exchange efficiency decreases due to heat exchange between the refrigerants because the initial inflow refrigerant and the discharge refrigerant flow through the same flat tube. In addition, in the tank part, a refrigerant inlet and a refrigerant outlet are formed at the front side of the heat exchanger for inflow and outflow of the refrigerant, and a refrigerant inlet pipe and a refrigerant discharge pipe must be connected to the refrigerant inlet and the refrigerant outlet so that the pipe connection process is added and expanded. Connecting valves is also complicated. In addition, since the space of the pipes must be secured in the air conditioning case, the size of the air conditioning case is enlarged, and there is also a problem that the air volume loss is caused by the resistance of the air caused by the pipes.

The latter heat exchanger is made by stacking aluminum extruded tubes and heating fins in turn, and combining header pipes at the upper and lower ends of the extruded tubes. By brazing afterwards, there is a problem that the passage resistance of the refrigerant is increased by the bending part and the heat transfer effect is lowered.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a heat exchanger capable of improving heat exchange performance and improving productivity by excluding a connection process of a refrigerant pipe.

1 is a perspective view showing a refrigerant flow structure of a heat exchanger according to Embodiment 1 of the present invention.

2 is a schematic longitudinal sectional view of a heat exchanger according to Embodiment 1 of the present invention.

3 is a left side view of a heat exchanger according to Embodiment 1 of the present invention.

4 is a cross-sectional view taken along the line IV-IV of FIG. 2 of the present invention.

5 is a schematic longitudinal sectional view showing a modification of the heat exchanger according to the first embodiment of the present invention.

6 is a perspective view illustrating a refrigerant flow structure of yet another modification of the heat exchanger according to Embodiment 1 of the present invention.

FIG. 7 is a side cross-sectional view of a lower tank constituting the heat exchanger of FIG. 6.

8 is a perspective view illustrating a refrigerant flow structure of a heat exchanger according to Embodiment 2 of the present invention.

9 is a side cross-sectional view of a lower tank constituting a heat exchanger according to Embodiment 2 of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: front extrusion tube row 2: rear extrusion tube row,

3: heating fin, 5: upper header pipe,

6: lower header pipe, 7: support block,

41, 42: side plate, 51: upper header,

52: upper tank, 61: lower header,

62: lower tank, 55, 65, 68: baffle,

63, 64, 67: dividing wall, 66: side connection tank,

71: refrigerant inlet hole, 72: refrigerant outlet hole,

621, 671: upper flow path, 622, 672: lower flow path,

624: front flow path, 625: rear flow path,

631: refrigerant inlet, 632: refrigerant outlet,

633: refrigerant discharge hole, 634: refrigerant inlet hole

In order to achieve the above object, the heat exchanger according to the present invention, the front and rear extrusion tube row sharing the heat transfer fin, and the header and the upper end of each of the extrusion tube forming the extrusion tube row is bonded to the header A heat exchanger comprising an upper header pipe of a tank, and a header into which a lower end of each extrusion tube forming the extruded tube rows is inserted, and a lower header pipe of a tank joined to the header, wherein the center of the upper header pipe is formed. Is blocked with a baffle, the lower tank is partitioned into an upper flow path and a lower flow path, and the upper flow path is partitioned into a front flow path and a rear flow path, and a center of the rear flow path is blocked with a baffle. A refrigerant inlet and a refrigerant outlet communicating with the flow path and the lower flow path are sequentially formed, and the rear side of the lower tank has a rear side. Formed through the ball and into the exhaust as well as a ball inlet is formed communicating with the lower flow path in order, the discharge hole is characterized in that is adapted to the inlet ball and tube.

According to the heat exchanger of the present invention configured as described above, when the refrigerant flows into the rear channel of the lower header pipe through the refrigerant inlet, the introduced refrigerant flows to the left half of the rear channel because a baffle is installed in the center of the rear channel. And from the flow zone to the left half of the upper header pipe through the extruded tubes making up the left half of the rear row of extruded tubes. In this way, the refrigerant flowing to the left half of the upper header pipe flows through the front extruded tubes to the left half of the front flow path of the lower header pipe because the rear extruded tubes and the front extruded tubes communicate with each other. And flows from the flow zone to the right half of the upper header pipe through the extruded tubes constituting the right half of the front row of extruded tubes. Thus, the refrigerant flowing to the right half of the upper header pipe flows to the right half of the rear flow path of the lower header pipe through the rear extruded tubes, so that the rear extruded tube and the front extruded tubes communicate with each other, and then are discharged through the discharge hole again. After flowing into the lower passage through the inlet hole flows to the left along the lower passage can be finally discharged through the refrigerant outlet.

In addition, the heat exchanger according to the present invention, the front and rear extrusion tube row sharing the heat transfer fin, the header of the upper end of each of the extrusion tube forming the extrusion tube row is inserted and the upper header consisting of a tank bonded to the header A heat exchanger comprising a pipe and a lower header pipe comprising a header into which a lower end of each extruded tube forming the extruded tube rows is inserted and a tank joined to the header, wherein the lower tank is divided into an upper flow path and a lower flow path. The center of the upper flow path is blocked with a baffle, and the coolant inlet and the coolant discharge port communicating with the upper flow path and the lower flow path are sequentially formed on the left side of the lower tank, and the discharge hole communicating with the upper flow path is formed on the right side of the lower tank. In addition, the inlet hole is formed in turn to communicate with the lower passage, the outlet hole is to communicate with the inlet hole It is characterized by.

According to the heat exchanger, when the refrigerant flows into the upper flow path of the lower header pipe through the refrigerant inlet, the introduced refrigerant flows to the left half of the upper flow path because the baffle is installed at the center of the upper flow path, Flows through the extruded tubes constituting the left half of the rear extruded tube row to the left half of the upper header pipe and then to the right half of the upper header pipe, and from this region through the extruded tubes constituting the right half of the front and rear extruded tube rows. After flowing to the upper flow path of the lower header pipe and then discharged through the discharge hole again flows into the lower flow path through the inlet hole and flows to the left along the lower flow path can be finally discharged through the refrigerant outlet.

Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings.

<Example 1>

A heat exchanger according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 7.

1 and 2, reference numeral 1 denotes a front row of extruded tubes in which a plurality of aluminum extruded tubes 11 are arranged at equal intervals, and reference numeral 2 denotes a plurality of aluminum extruded tubes 21. It shows the rear extruded tube rows arranged at equal intervals. It is preferable that the front extrusion tube row 1 and the rear extrusion tube row 2 are arranged at a predetermined interval.

The front extruded tubes 11 constituting the front extruded tube row 1 and the rear extruded tubes 21 constituting the rear extruded tube row 2 are preferably arranged to correspond to each other, and thus the front extruded tube 11. Field and rear extruded tubes 21 are arranged to correspond to each other so that the heat transfer fins 3 can be inserted between the rear extruded tubes 21 when the heat transfer fins 3 are inserted through the front extrusion tubes 11. The front extrusion tube row 1 and the rear extrusion tube row 2 may share the heat transfer fins 3.

It is preferable that both sides of the front extruded tube row 1, the rear extruded tube row 2, and the heat transfer fins 3 are sequentially reinforced with side plates 41 and 42 on both sides thereof.

The upper header pipe 5 is installed at the upper ends of the two extruded tube rows 1 and 2, and the lower header pipe 6 is installed at the lower ends of the two extruded tube rows 1 and 2. The rows 1 and 2 share the upper header pipe 5 and the lower header pipe 6 and are supported by a stacking state of the extruded tubes 11 and 21 and the heat transfer fins 3.

The upper header pipe 5 is joined to the upper header 51 and the upper header 51 to which the upper ends of each of the extruded tubes 11 and 21 forming the two extruded tube rows 1 and 2 are inserted and joined. Is composed of an upper tank 52 communicating with the extruded tubes (11, 21), the baffle (55) is installed in the center of the upper tank (52). Therefore, the inside of the left half portion and the right half portion of the upper header pipe 5 are blocked so as not to communicate with each other by the baffle 55.

The lower header pipe 6 is joined to the lower header 61 and the lower header 61 to which the lower ends of the extruded tubes 11 and 21 forming the two extruded tube rows 1 and 2 are inserted and joined. As a result, the inside is composed of a lower tank 62 communicating with the extruded tubes 11 and 21. As shown in FIG. 4, the lower tank 62 is divided into an upper flow path 621 and a lower flow path 622 by a horizontal separation wall 63, and the upper flow path 621 is a vertical separation wall 64. ) Is partitioned into a front flow path 624 and a rear flow path 625. The baffle 65 is installed at the center of the rear flow path 625, that is, at a position corresponding to the baffle 55 provided in the upper header pipe 5, so that the inside of the left half of the rear flow path 625 of the upper flow path 621. The inside of the right half and the right half are blocked so that they do not communicate with each other. 1, a coolant inlet 631 communicating with the rear flow path 625 and a coolant discharge port 632 communicating with the lower flow path 622 are formed on a left side surface of the lower tank 62. A coolant discharge hole 633 communicating with the rear flow path 625 and a coolant inflow hole 634 communicating with the lower flow path 622 are formed on the right side of the 62. In addition, the right side surface of the lower side tank 62 is joined to the side connection tank 66 (see FIG. 2) including the refrigerant discharge hole 633 and the refrigerant inlet hole 634. The lower passage 622 may communicate with each other through the refrigerant discharge hole 633, the inside of the side connection tank 66, and the refrigerant inlet hole 634.

In addition, according to the first embodiment, as shown in FIG. 4, when the stage is formed such that the width of the lower passage 622 is smaller than the width of the upper passage 621 around the inner circumferential surface of the lower tank 62, the horizontal It is easy to install the dividing wall 63 at an appropriate height. In addition, the horizontal dividing wall 63 and the vertical dividing wall 64 may be integrally formed by extrusion.

Next, the operation of the heat exchanger according to the first embodiment of the present invention configured as described above will be described.

When the refrigerant flows into the rear flow path through the refrigerant inlet 631 of the lower header pipe 6 during the operation of the cooling system, the introduced refrigerant flows into the rear flow path because the baffle 65 is installed at the center of the rear flow path 625. 625) to the left half. The refrigerant flowing into the left half region of the rear flow passage 625 flows from the left half portion of the upper header pipe 5 through the extruded tubes 21 constituting the left half of the rear extruded tube row 2. Since the inside of the left half portion and the right half portion of the upper header pipe 5 are blocked from passing through each other by the baffle 55, the refrigerant flowing to the left half of the upper header pipe 5 is the right half of the upper header pipe 5. Do not flow negatively. Therefore, the refrigerant flowing to the left half of the upper header pipe 5 passes through the inside of the left half of the upper header pipe 5 and the extruded tubes 11 and the rear extruded tube rows 2 of the front extruded tube rows 1. Since the extruded tubes 21 communicate with each other, they flow through the extruded tubes 11 of the front extruded tube row 1 to the left half of the front flow path 624 of the lower header pipe 6. That is, the refrigerant first introduced into the heat exchanger has an inverted U-turn at the left half of the heat exchanger.

As described above, the coolant flowing to the left half of the front flow path 624 flows to the right half of the front flow path 624 because no baffle is provided in the front flow path 624, and the right half area of the front flow path 624. From the flow through the extrusion tube 11 constituting the right half of the front extrusion tube row 1 to the right half of the upper header pipe (5). The coolant flowing to the right half of the upper header pipe 5 as described above is extruded tubes 11 constituting the right half of the front extruded tube row 1 and extruded tubes 21 constituting the right half of the rear extruded tube row 2. ) Are in communication with each other and flow through the rear extrusion tubes 21 to the right half of the rear flow path 625 of the lower header pipe (6). In other words, in the right half of the heat exchanger, the refrigerant has another U turn. Since the baffle 65 is provided at the center of the rear flow passage 625, the refrigerant flowing to the right half of the rear flow passage 625 does not flow to the left half of the rear flow passage 625, but communicates with the right half of the rear flow passage 625. The refrigerant is discharged into the side connection tank 66 through the discharge hole 633, and the inside of the side connection tank 66 communicates with the right half of the lower passage 622 through the refrigerant inlet hole 634. The refrigerant introduced into the connection tank 66 flows into the right half of the lower passage 622 through the refrigerant inlet 634 and immediately flows to the right half of the lower passage 622, and finally through the refrigerant outlet 632. May be discharged.

According to the first embodiment, as shown in Figures 2 and 3, in order to facilitate the connection of the refrigerant inlet pipe and the refrigerant discharge pipe or the connection of the expansion valve, the refrigerant inlet flow path ( 71 and the support block 7 having the refrigerant discharge passage 72 are preferably installed and supported. The refrigerant inflow passage 71 and the refrigerant discharge passage 72 of the support block 7 are connected to the refrigerant inlet 631 and the refrigerant outlet 632 formed in the lower header pipe 6.

In addition, according to the first embodiment, when the support block 7 is not employed, as shown in FIG. 5, the refrigerant inlet pipe 76 and the refrigerant discharge pipe 77 are connected to the lower header pipe 6. It is preferable to directly connect the refrigerant inlet 631 and the refrigerant outlet 632.

In addition, in the above example, the inside of the lower header pipe 6 is partitioned into the upper flow path 621 and the lower flow path 622 by the horizontal separation wall 63 and the upper flow path 621 by the vertical separation wall 64. ) Is partitioned into a front flow path 624 and a rear flow path 625, but for ease of assembly so as to accurately partition the areas of these flow paths, the horizontal dividing wall 63 as shown in Figs. And the vertical dividing wall 64 may be integrally formed in a cross shape by extrusion. As described above, when the horizontal partition wall 63 and the vertical partition wall 64 are formed crosswise, the lower flow path 622 is also divided back and forth, but as shown in FIG. 6, both sides of the lower tank 62 communicate with the lower flow path 622. Refrigerant discharge port 632 and the refrigerant inlet hole 634 formed in the can be communicated with the front and rear flow path of the lower flow path 622 including both ends of the vertical separation wall 64, it does not interfere with the discharge of the refrigerant. As such, when the horizontal partition wall 63 and the vertical partition wall 64 are formed in a cross shape, the horizontal partition wall 63 and the vertical partition wall 64 may be easily extruded and manufactured, and the process of joining the lower tank 62 may be easy, and the lower tank 62 may be cut. Not only do not need to form a, but also the height of the upper passage 621 and the lower passage 622 need not be matched.

<Example 2>

A heat exchanger according to Embodiment 2 of the present invention will be described with reference to FIGS. 8 and 9.

In Example 2, the same part as Example 1 mentioned above attaches | subjects the same code | symbol, and the detailed description here is abbreviate | omitted.

In the second embodiment, the inside of the lower header pipe 6, that is, the inside of the lower tank 62, is partitioned only by the upper flow path 671 and the lower flow path 672 by the horizontal dividing wall 67. In addition, a coolant inlet 631 communicating with the upper flow path 671 and a coolant discharge port 632 communicating with the lower flow path 672 are formed on the left side of the lower tank 62, and a right side of the lower tank 62 is provided. The coolant discharge hole 633 communicating with the upper flow path 671 and the coolant inlet hole 634 communicating with the lower flow path 672 are formed in this order. In addition, the left side of the lower tank 62 is provided with a side connection tank 66 as shown in Figure 5 including the refrigerant discharge hole 633 and the refrigerant inlet hole 634, the refrigerant discharge hole 633, The right end of the upper passage 671 and the right end of the lower passage 672 communicate with each other through the inside of the side connection tank 66 and the refrigerant inlet hole 634. In addition, the baffle 68 is provided at the center of the upper flow path 671 so that the inside of the left half and the right half of the upper flow path 671 are blocked from passing through each other.

In addition, unlike the first embodiment, the baffle is not installed inside the upper header pipe 5. Therefore, the inside of the left half and the right half of the upper header pipe 5 may communicate with each other.

Therefore, when the refrigerant flows into the upper passage 671 of the lower header pipe 6 through the refrigerant inlet 631, the introduced refrigerant has an upper passage (baffle 68) in the center of the upper passage 671. 671 flows to the left half and from this area to the left half of the upper header pipe 5 through the extruded tubes 11 and 21 constituting the left half of the front and rear rows of extruded tubes 1 and 2. And then flows to the right half of the upper header pipe 5 and from this region through the extruded tubes 11 and 21 forming the right half of the front and rear rows of extruded tubes 1, 2 After flowing into the flow path 671, the liquid is discharged into the side connection tank 66 through the refrigerant discharge hole 633, and then flows into the right half of the lower flow path 672 through the refrigerant inlet hole 634. The refrigerant introduced into the right half of the lower passage 672 may flow straight to the left along the lower passage 672 and finally be discharged through the refrigerant outlet 632.

According to the heat exchanger according to the present invention configured as described above, since the front extrusion tube row 1 and the rear extrusion tube row 2 are arranged at a predetermined interval, when exchanging heat with the outside air performed during the flow of the refrigerant Not only the heat transfer phenomenon between the refrigerants is blocked, but also the ventilation resistance is reduced, so that the heat exchange efficiency can be increased, thereby improving the cooling performance.

In addition, since it has a high heat exchange efficiency structure as described above, not only the heat exchanger can be compact but also the pressure resistance is improved by using an extruded tube.

In addition, a coolant inlet 631 and a coolant outlet 632 are provided on the side of the heat exchanger, and a support block 7 for easily connecting an expansion valve, a coolant inlet pipe, and a coolant discharge pipe to the side plate 41 is provided. Therefore, not only components such as connecting pipes and connecting flanges can be eliminated, but also the number of assembly operations can be reduced, thereby improving productivity and assembling performance of the heat exchanger.

In addition, by allowing various pipes for the flow of refrigerant to be connected to the side of the heat exchanger, the installation space of the air conditioning case can be reduced, making the air conditioning case compact and securing the flexibility of the layout design of the heat exchanger. can do.

Claims (6)

A front side extruded tube row 1 and a rear side extruded tube row 2 sharing the heat transfer fins 3, and both side plates 41 and 42 installed on and reinforcing the heat transfer fins and the extrusion tube rows; An upper header pipe 5 comprising a header 51 having an upper end of each extruded tube forming the extruded tube rows and a tank 52 bonded to the header, and a lower end of each extruded tube forming the extruded tube rows. A heat exchanger comprising the inserted header 61 and a lower header pipe 6 composed of a tank 62 joined to the header, The center of the upper header pipe 5 is blocked by a baffle 55, The lower tank 62 is partitioned into an upper passage 621 and a lower passage 622 and the upper passage is divided into a front passage 624 and a rear passage 625. The center of the rear channel is blocked by a baffle (65), On the left side of the lower tank, a coolant inlet 631 and a coolant outlet 632 communicating with the rear channel and the lower channel are sequentially formed. On the right side of the lower tank, a coolant discharge hole 633 is formed in communication with the rear channel, and a coolant inlet hole 634 is formed in order to communicate with the lower channel. Heat exchanger, characterized in that the right side of the lower tank is joined to the side connection tank (66) including the refrigerant discharge hole and the refrigerant inlet hole. (1 time correction) The support block 7 according to claim 1, wherein a coolant inflow channel 71 and a coolant discharge channel 72 are formed in the left side plate 41, and the coolant inflow channel of the support block is provided. And a refrigerant discharge passage communicating with the refrigerant inlet 631 and the refrigerant outlet 632 of the lower header pipe 6. According to claim 1 or 2, wherein the upper passage 621 and the lower passage 622 is partitioned by a horizontal separation wall 63 is installed in the lower tank 62, the front passage 624 and The rear channel (625) is a heat exchanger, characterized in that partitioned by a vertical partition wall (64) which is integrally installed above the horizontal partition wall (63). 4. The stage of claim 3, wherein the height of the horizontal dividing wall 63 is fixed by making the width of the lower passage 622 smaller than the width of the upper passage 621 around the inner circumferential surface of the lower tank 62. A heat exchanger, characterized in that formed. A front side extruded tube row 1 and a rear side extruded tube row 2 sharing the heat transfer fins 3, and both side plates 41 and 42 installed on and reinforcing the heat transfer fins and the extrusion tube rows; An upper header pipe 5 comprising a header 51 having an upper end of each extruded tube forming the extruded tube rows and a tank 52 bonded to the header, and a lower end of each extruded tube forming the extruded tube rows. A heat exchanger comprising the inserted header 61 and a lower header pipe 6 composed of a tank 62 joined to the header, The lower tank 62 is divided into an upper passage 671 and a lower passage 672, The center of the upper passage is blocked by a baffle 68, On the left side of the lower tank, a coolant inlet 631 and a coolant outlet 632 communicating with the upper flow path and the lower flow path are sequentially formed. The right side surface of the lower tank is formed with a refrigerant discharge hole 633 communicating with the upper flow path and a refrigerant inlet hole 634 communicating with the lower flow path in turn, Heat exchanger, characterized in that the right side of the lower tank is joined to the side connection tank (66) including the refrigerant discharge hole and the refrigerant inlet hole. (Single correction) The support block 7 according to claim 5, wherein a coolant inflow channel 71 and a coolant discharge channel 72 are formed in the left side plate 41, and the coolant inlet hole of the support block is provided. And a refrigerant discharge hole communicate with the refrigerant inlet 631 and the refrigerant discharge port 632 of the lower header pipe 6.