KR20010057326A - Laminate type heat exchanger for vehicle - Google Patents

Abstract

PURPOSE: A laminated heat exchanger is provided to decrease the number of necessary elements and to simplify an assembling process by connecting refrigerant inlet/discharge ports of a first end plate directly to each refrigerant inlet/discharge path of a support block as well as connecting an expansion valve or a refrigerant pipe directly to the support block. CONSTITUTION: In a laminate heat exchanger, plural flat tubes(1) having bonded two plates(2) and plural heat transfer fins(3) are layered alternately. A first end plate(4) is bonded to the left plate(2L) while a second end plate(5) is layered on the right plat(2R). The two plates are divided into a first and a second heat exchanger by each partition rib. The first heat exchanger has a first hole cup(211) while a second and a third hole cup(223) are formed before and after the lower end of the second heat exchanger. A partition rib is formed to the upper end of the second heat exchanger from a clearance between the second and the third hole cup. A reverse U-turn path is formed in the second heat exchanger to communicate the second hole cup with the third one. The left plate is a no tank plate and the second hole cup is clogged. The first hole cup is communicated with a refrigerant discharge port(42) of the first end plate. A refrigerant inlet port(41) of the first end plate is communicated with the third hole cup of the left no tank plate. The right plate is a no tank plate and the second hole cup is clogged. The third hole cup is communicated with the first hole cup of the right no tank plate. The third hole cup of a central plate(2C) is closed.

Description

Multilayer Heat Exchanger {LAMINATE TYPE HEAT EXCHANGER FOR VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger constituting an air conditioner for automobiles, and more particularly to a laminated heat exchanger capable of increasing heat exchange performance and compacting the heat exchanger.

In general, a laminated heat exchanger is formed by alternately stacking flat tubes consisting of two plates joined to each other and heating fins, and double tank type having a tank part on both sides of the top and bottom, and a single tank type having a tank part on one of the upper and lower sides. do. In addition, the tank portion is connected to the refrigerant inlet pipe and the refrigerant discharge pipe for the inlet and discharge of the refrigerant toward the front of the heat exchanger. In such a general multilayer heat exchanger, the process of connecting the pipes is not only added, but the space of the pipes must be secured in the air conditioning case, so the size of the air conditioning case is increased, and the air flow loss is generated by the pipes. Will result.

Therefore, in order to make the heat exchanger and the air conditioning case compact, a laminated heat exchanger as disclosed in Japanese Patent Laid-Open No. 11-63881 has been proposed.

This heat exchanger is provided with many intermediate plates of parallel shape, and two pair of end plates arrange | positioned one by one on the outside of a left side as shown. A fluid introduction flow path and a fluid discharge flow path separated therefrom are formed between the left end plates. In addition, the volume of the upper tank portion is approximately half the volume of the lower tank portion. According to the heat exchanger, since the inlet pipe of the refrigerant is connected to the left end plate and arranged on the side of the heat exchanger, the assembling process of the inlet pipe is omitted, while the inlet pipe is placed outside of the air conditioning case. It can be made compact.

However, in the laminated heat exchanger of Japanese Patent Application Laid-Open No. 11-63881, the refrigerant is introduced and flows through the upper tank portion, which is about half the volume of the lower tank portion, and flows out through the plates and the lower tank portion. There is a problem that the heat exchange efficiency is lowered as a result of falling and non-uniform refrigerant flow distribution. In addition, there is a problem that the passage resistance increases because there is a welding surface in the center of the upper tank portion.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a laminated heat exchanger capable of compacting a heat exchanger and an air conditioning case and improving heat exchange performance.

1 is an exploded perspective view showing two plates constituting a stacked heat exchanger according to Embodiment 1 of the present invention.

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

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

4 is a schematic left side view showing a stacked heat exchanger according to Embodiment 1 of the present invention.

5 is a schematic longitudinal cross-sectional view showing a stacked heat exchanger according to Embodiment 2 of the present invention.

6 is a schematic left side view showing a stacked heat exchanger according to Embodiment 2 of the present invention.

7 is an exploded perspective view showing two plates constituting the stacked heat exchanger according to Embodiment 3 of the present invention.

FIG. 8 is a schematic perspective view illustrating a refrigerant flow structure of a stacked heat exchanger according to Embodiment 3 of the present invention.

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

1: flat tube, 2: plate,

2C: center plate, 2L: leftmost furnace tank plate,

2R: rightmost furnace tank plate, 3: heat transfer fin,

4: first end plate, 5: second end plate,

6: support block, 21: first heat exchanger,

22: second heat exchanger, 23, 27: compartment rib,

24: reverse U-turn euro, 41: refrigerant inlet,

42: refrigerant outlet, 61: refrigerant inlet,

62: refrigerant discharge flow path, 63, 64: connecting pipe,

211: first hole cup, 222: second hole cup,

223: 3rd hole cup

In order to achieve the above object, the laminated heat exchanger according to the present invention, a plurality of flat tubes and a plurality of heat transfer fins are laminated alternately, the leftmost plate is bonded to the first end plate and the rightmost plate In the stacked heat exchanger is formed by stacking a second end plate, each plate is divided into a first heat exchange part at the top and a second heat exchange part at the bottom thereof by partition ribs, and a first hole cup is formed at the first heat exchange part. In addition, a second hole cup and a third hole cup are formed at a lower end of the second heat exchange part before and after, and a partition rib is formed from the second hole cup and the third hole cup to the upper end of the second heat exchange part so that a second hole cup is formed on the inner surface of the second heat exchange part. And an inverted U turn portion communicating with the third hole cup; The leftmost plate of the plates is a no tank plate and the second hole cup is clogged while the first hole cup of the leftmost furnace tank plate communicates with the refrigerant outlet of the first end plate; The refrigerant inlet of the first end plate communicates with the third hole cup of the leftmost furnace tank plate; The rightmost plate of the plates is a furnace tank plate and the second hole cup is clogged while the third hole cup communicates with the first hole cup of the rightmost furnace tank plate through an internal flow path of the second end plate; Among the plates, the third hole cup of the center plate is closed.

According to the present invention, a support block having a refrigerant inflow passage and a refrigerant discharge passage may be installed on an outer surface of the first end plate, and the refrigerant inlet passage and the refrigerant discharge passage of the support block may include a refrigerant inlet port of the first end plate, It is connected to the refrigerant outlet.

According to the multilayer heat exchanger of the present invention configured as described above, when the refrigerant flows between the first end plate and the leftmost furnace tank plate through the refrigerant inlet flow path of the support block and the refrigerant inlet port of the first end plate, the refrigerant is left. Refrigerant flows toward the central plate through the third hole cups of the half plates (i.e., the plates to the leftmost furnace tank plate and the central plate), and at the same time the refrigerant flowing into the third hole cups Flow toward the second hole cups of the half plates. And the refrigerant flowing into the second hole cups of the plates is the second hole cups of the right half plates (ie, the plates up to the center plate and the rightmost furnace tank plate) since the second hole cup of the leftmost furnace tank plate is blocked. Flow to the side. Thus, the refrigerant flowing in the second hole cups flows toward the third hole cups of the right half plates through the reverse U turn part because the second hole cup of the rightmost furnace tank plate is blocked. Thus, the refrigerant flowing toward the third hole cups flows into the inner flow path of the second end plate through the third hole cup of the rightmost furnace tank plate and is connected to the leftmost furnace tank from the first hole cup of the rightmost furnace tank plate. After flowing to the first hole cup of the plate may be discharged through the refrigerant discharge port of the refrigerant block and the support block of the first end plate.

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>

1 to 4, a stacked heat exchanger according to Embodiment 1 of the present invention will be described.

In the stacked heat exchanger according to the first embodiment, a plurality of flat tubes 1 and two heating fins 3 to which two plates 2 and 2 are joined are alternately stacked, and the leftmost plate (inside plate 2 The first end plate 4 is bonded to the right end plate 2R, and the second end plate 5 is stacked on the rightmost plate 2R, and the outer surface of the first end plate 4 is indicated. Support block 6 is installed on the.

According to the first embodiment, the plate 2 is formed by the partition ribs 27 in which the first heat exchange part 21 at the upper end and the second heat exchange part 22 thereunder are recessed. Therefore, the inner surfaces of the first heat exchange part 21 and the second heat exchange part 22 do not communicate with each other. In addition, a first hole cup 211 is formed in the first heat exchange part 21, and a second hole cup 222 and a third hole cup 223 are formed at the lower end of the second heat exchange part 22. Also, in order to prevent the second hole cup 222 and the third hole cup 223 from immediately communicating with each other, the second hole cup 222 and the third hole cup 223 are partitioned from the upper end of the second heat exchange part 22. As the ribs 23 are formed, the reverse U turn path 24 may be formed on the inner surface of the second heat exchange part 22. Therefore, when the refrigerant flows into the second heat exchange part 22 through the second hole cup 222 (or the third hole cup 223), the third hole cup 223 (or the second hole cup through the reverse U turn path 24). Refrigerant can flow to (222).

By joining the two plates 2 and 2 formed as described above, the edges (ie flanges) corresponding to each other of the two plates 2 and 2, the partition ribs 23 and 27 of the two plates 2 and 2, and the two plates are The flat tube 1 may be formed by bonding the edges of the hole cups 211 and 211 and 222 and 222 and 223 and 223 corresponding to each other in (2, 2).

Therefore, a flow space is formed by the reverse U-turn flow paths 24 and 24 inside each flat tube 1, that is, between the second heat exchange portions 22 and 22 of the two plates 2 and 2. The silver communicates with the hole cups 222 and 222 and 223 and 223 corresponding to each other of each plate 2, so that the refrigerant can flow.

In addition, a plurality of embossing beads 25 may be formed in a predetermined arrangement on the inner surface of the second heat exchange part 22 of each plate 2. As such, when the embossed beads 25 are formed, the two embossed beads 25 and 25 corresponding to each other of the two plates 2 and 2 are joined to each other, thereby increasing the strength of the flat tube 1 and causing the refrigerant to vortex. While flowing, the heat transfer property of the refrigerant may be improved.

According to the first embodiment, the passage area of the first hole cup 211 is preferably larger than the passage area of the second hole cup 222 or the third hole cup 223. To this end, the first hole cup 211 is formed to occupy most of the area of the first heat exchange part 21 to maximize the front and rear width of the plate, and the height of the first heat exchange part 21 is 6 mm or less. In this case, the passage area of the first hole cup 211 and the heat transfer area of the refrigerant can be secured to the maximum, and the dual effect of compacting the size of the heat exchanger can be achieved.

Further, according to Embodiment 1, the leftmost plate 2L and the rightmost plate 2R have a no tank plate structure without cups, but correspond to hole cups of other plates. Are formed in the first hole to third hole cups with the same reference numerals corresponding to the hole cups of the other plates, and the leftmost plate 2L is referred to as the leftmost furnace tank plate, The plate 2R is called the rightmost furnace tank plate.

Meanwhile, according to Embodiment 1, as shown in FIG. 2, the second hole cup 222 of the leftmost furnace tank plate 2L of the plates 2 is blocked, and as shown in FIG. The first hole cup 211 of the furnace tank plate 2L communicates with the refrigerant outlet 42 of the first end plate 4, and the third hole cup 223 of the leftmost furnace tank plate 2L is made of It communicates with the refrigerant inlet 41 of the one-end plate 4.

The refrigerant inlet 41 of the first end plate 4 is directly connected to the refrigerant inlet passage 61 of the support block 6, and the refrigerant outlet 42 of the first end plate is the refrigerant of the support block 6. It is directly connected to the discharge passage 62. In addition, although not shown in the support block 6, an expansion valve or a refrigerant pipe may be directly connected.

Therefore, the refrigerant flowing through the refrigerant inlet flow passage 61 of the support block 6 passes through the refrigerant inlet 41 of the first end plate 4 and the left end tank tank 2L. The first hole cup 211 of the leftmost furnace tank plate 2L may flow into the third hole cup 223 of the leftmost furnace tank plate 2L and flow toward each plate 2 through the flow path therebetween. Refrigerant discharged through the through the flow path between the leftmost furnace tank plate (2L) and the first end plate (4) through the refrigerant discharge port 42 of the first end plate (4) of the support block (6) It may be discharged toward the refrigerant discharge passage (62).

As shown in FIG. 3, the coolant inlet 41 and the coolant outlet 42 of the first end plate 4 protrude outwardly so that the coolant inlet 61 and the coolant outlet 62 of the support block 6 are located. In the case of being inserted and joined in sequence, the process of joining and combining the refrigerant pipes separately can be omitted.

Further, according to the first embodiment, as shown in FIG. 2, the second hole cup 222 of the rightmost furnace tank plate 2R of the plates 2 is clogged, as shown in FIGS. 2 and 3. Likewise, the third hole cup 223 of the rightmost furnace tank plate 2R is connected to the rightmost furnace tank plate 2R through an internal flow path formed by the rightmost furnace tank plate 2R and the second end plate 5. The first hole cup 211 communicates with the third hole cup 223 of the center plate 2C of the plates 2.

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

When the refrigerant flows into the refrigerant inlet 41 of the first end plate 4 through the refrigerant inlet passage 61 of the support block 6 supporting the expansion valve, the refrigerant of the first end plate 4 The refrigerant flows into the third hole cup 223 of the leftmost furnace tank plate 2L communicating with the inlet 41. In this way, when the refrigerant flows into the third hole cup 223 of the leftmost furnace tank plate 2L, the third hole cup 223 of the center plate 2C is blocked, so the refrigerant is removed from the leftmost furnace tank plate 2L. It flows from the 3 hole cup 223 to the 3rd hole cup 223 of the center plate 2C, and at the same time the plate from these left half plates 2 (leftmost tank plate 2L to center plate 2C) Refrigerant flowing into the third hole cup 223 flows toward the second hole cups 222 of the plates 2 through the reverse U turn channel 24 of the plates 2. As such, the refrigerant flowing into the second hole cups 222 of the left half plates 2 is blocked by the second hole cup 222 of the leftmost furnace tank plate 2L, and the second hole cup of the center plate 2C ( Since the 222 is open, it flows through the second hole cup 222 of the center plate 2C to the second hole cup 222 of the rightmost furnace tank plate 2R, and at the same time, the rightmost furnace tank plate 2R. Coolant flows toward the second hole cups 222 of the right half plate 2 (plates from the middle plate 2C to the rightmost furnace tank plate 2R) because the second hole cup 222 of the container is blocked. Flows toward the third hole cups 223 of the right half plates 2 through the reverse U turn channel 24 of the right half plates 2. As such, the coolant flowing toward the third hole cups 223 of the right half plate 2 is blocked by the third hole cup 223 of the center plate 2C, while the third hole cup of the rightmost furnace tank plate 2R is blocked. Since 223 is open, it flows into the inner flow path formed by the rightmost furnace tank plate 2R and the second end plate 5 through the third hole cup 223 of the rightmost furnace tank plate 2R. It flows into the 1st hole cup 211 of 2R of rightmost furnace tank plates which communicate with this. Since the first hole cups 211 of the plates 2 from the rightmost furnace tank plate 2R to the leftmost furnace tank plate 2L communicate with each other, the first of the rightmost furnace tank plate 2R The refrigerant flowing into the one-hole cup 211 flows straight into the first hole cup 211 of the leftmost furnace tank plate 2L in a straight line, and then the refrigerant outlet 42 of the first end plate 4 communicating therewith. , And may be discharged toward the expansion valve via the refrigerant discharge passage 62 of the support block 6.

<Example 2>

5 and 6, a stacked heat exchanger according to Embodiment 2 of the present invention will be described.

In the stacked heat exchanger according to the second embodiment, the support block 6 is disposed at a predetermined distance from the outer surface of the first end plate 4 in the above-described first embodiment, and the refrigerant inlet flow path of the support block 6 ( 61 is connected to the refrigerant inlet 41 of the first end plate 4 through the connecting tube 63, the refrigerant discharge passage 62 of the support block 6 is the first end through the connecting tube (64). Except that it is connected to the refrigerant outlet 42 of the plate 4, the rest of the configuration and operation is the same as in the first embodiment described above, the same parts as in the first embodiment described above are denoted by the same reference numerals The detailed description is omitted.

<Example 3>

7 and 8, a stacked heat exchanger according to Embodiment 3 of the present invention will be described.

The multi-layered heat exchanger according to the third embodiment has a substantially triangular shape in which the first heat exchange unit 21 gradually decreases from the center of the upper end to the lower side in the first and second embodiments, and the first hole cup 211. ) Is the same shape as that of the second hole cup 222 or the third hole cup 223 of the first heat exchange unit 21 in any one form selected from the group comprising a circular or other elliptical, trapezoidal or square as shown. The rest of the configuration and operation are the same as in the above-described Embodiments 1 and 2, except that they are formed in arbitrary positions, and therefore, the same parts as in Embodiments 1 and 2 are denoted by the same reference numerals and the detailed description thereof Description is omitted.

In the stacked heat exchanger according to the present invention configured as described above, the refrigerant evaporates while the refrigerant flows through the second heat exchange part 22 having a large heat transfer area at the initial stage of refrigerant introduction, and is finally partitioned off from the second heat exchange part 22. Since the first heat exchange part 21 is discharged, the initial evaporation effect of the refrigerant is excellent, and heat transfer between the first heat exchange part 21 and the second heat exchange part 22 is blocked, and thus the heat exchange efficiency is excellent.

In addition, since the refrigerant completely evaporated through the second heat exchange unit 22 is discharged in a straight line, it is possible to reduce the discharge resistance of the refrigerant.

In addition, since the passage area of the first hole cup 211 is made larger than the passage area of the second hole cup 222 or the third hole cup 223, the height of the second heat exchange part 22 can be lowered, thereby making the heat exchanger compact. Can be planned.

In addition, the refrigerant inlet 41 and the refrigerant outlet 42 of the first end plate 4 may be directly connected to the refrigerant inlet 61 and the refrigerant outlet 62 of the support block 6 as well as the support block. Since the expansion valve or the refrigerant pipe can be directly connected to (6), not only the component can be reduced but also the assembly is simple, thereby improving productivity.

Claims (7)

A plurality of flat tubes (1) and a plurality of heat transfer fins (3) in which two plates (2, 2) are joined are alternately stacked, and the first end plate (4) is joined to the leftmost plate (2L), and the most In the stacked heat exchanger in which the second end plate 5 is stacked on the right plate 2R, Each of the plates 2 is divided into a first heat exchanger 21 at an upper portion and a second heat exchanger 22 at a lower portion thereof by a partition rib 27, and a first hole cup 211 at the first heat exchanger. In addition, a second hole cup 222 and a third hole cup 223 are formed at the lower end of the second heat exchange part before and after, and are partitioned from between the second hole cup and the third hole cup to the upper end of the second heat exchange part 22. By forming the ribs 23, an inverted U-turn flow passage 24 is formed on the inner surface of the second heat exchange part 22 to communicate the second hole cup and the third hole cup; Among the plates, the leftmost plate 2L is the furnace tank plate, and the second hole cup 222 is clogged, and the first hole cup 211 of the leftmost furnace tank plate 2L is the first end plate 4. In communication with the refrigerant discharge port 42; The refrigerant inlet (41) of the first end plate (4) communicates with the third hole cup (223) of the leftmost furnace tank plate (2L); Among the plates, the rightmost plate 2R is the furnace tank plate, the second hole cup 222 is clogged, and the third hole cup 223 is the rightmost furnace tank plate through the inner channel of the second end plate 5. Communicates with the first hole cup 211 of 2R; Stacked heat exchanger, characterized in that the third hole cup (223) of the center plate (2C) of the plates are blocked. According to claim 1, wherein the outer surface of the first end plate (4) is provided with a support block (6) having a refrigerant inlet passage (61) and a refrigerant discharge passage (62), the refrigerant inlet passage (61) Stacked heat exchanger, characterized in that connected to the refrigerant inlet (41) of the first end plate and the refrigerant discharge passage (62) is connected to the refrigerant outlet (42) of the first end plate. According to claim 1, wherein the support block (6) having a refrigerant inlet passage (61) and a refrigerant discharge passage (62) on the outer surface of the first end plate (4) is arranged at a predetermined interval, the refrigerant inlet passage 61 is connected to the refrigerant inlet 41 of the first end plate and the connecting tube 63, and the refrigerant discharge passage 62 connects the refrigerant outlet 42 and the connecting tube 64 of the first end plate. Stacked heat exchanger, characterized in that connected through. The first hole cup 211 according to any one of claims 1 to 3, wherein the first hole cup 211 formed in the first heat exchange part 21 is formed to occupy most of the area of the first heat exchange part 21. 211, the passage area is larger than the passage area of the second hole cup (222) or the third hole cup (223) formed in the second heat exchange unit (22). 5. The stack type heat exchanger according to claim 4, wherein the height of the first heat exchange part is 6 mm or less. The method according to any one of claims 1 to 3, wherein the first heat exchange part 21 is formed in a substantially triangular shape in the form of gradually decreasing from the center of the upper end to the lower both sides, the first hole cup 211 is the second hole cup 222 or the laminated heat exchanger, characterized in that made of the same size as the third hole cup (223). The method of claim 6, wherein the first hole cup 211 is formed in any position of the first heat exchange unit 21 in any one form selected from the group consisting of circular, elliptical, trapezoidal or square. Stacked heat exchanger.