JP2001174191A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat exchanger wherein dies for molding various kinds of tanks for the rear seat for the use in cold districts are reduced, and solve a problem in the conventional tank that a heat exchanging medium bypasses from the gap between the inside surface of the tank and the partition. SOLUTION: A block 2 in which a heat exchange medium circulates is composed of a pair of tanks 3, a great number of tubes 4 having paths 5 for heat exchanging medium communicating between the tanks 3 and fins 6 interposed between the tubes 4. The amount of heat exchange between the air passing between the tubes 4 and the heat exchange medium is made adjustable by selecting the number of the blocks 2 to be arranged in the ventilation direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used for a vehicle, for example, and more particularly to a structure of a heater core as a heating means for air passing through a duct.

[0002]

2. Description of the Related Art As a heater core of this type of air conditioner, there is a heat exchanger disclosed in Japanese Patent Application Laid-Open No. Hei 5-196388. The configuration of this heat exchanger will be described with reference to the above publication.
The first is divided into two compartments by a partition plate extending in the ventilation direction, and each compartment has an inlet pipe or an outlet pipe.
A core portion including a tank, a plurality of tubes arranged in parallel, one end of which communicates with the first tank, and a plurality of fins arranged between the tubes; and a communication portion with the other end of the tube And a second tank. According to this configuration, the heat exchange medium that has flowed into the one compartment of the first tank from the inlet pipe flows through the tube to the second tank, and flows through the second tank in the direction in which the tubes are juxtaposed. This time, the tube rises and flows out of the other compartment of the first tank through the outlet pipe to the outside of the heat exchanger.

On the other hand, in a heater core mounted on a vehicle for a cold region, the width of a tube constituting the heater core for a cold region in the ventilation direction may be made larger than that of a normal tube in order to improve the heat radiation capability. Not a few. In addition, the heater core used for heating the rear seats of a one-box car or the heater core mounted on a vehicle for the tropical or subtropical region may have a low heat radiation capability. Can also be reduced.

[0004]

However, in the structure of the heat exchanger disclosed in the above publication, the width of the tube in the ventilation direction is changed to change the width of the first tank and the second tank communicating with the tube in the ventilation direction. Therefore, when forming the tank by plastic working such as press working or roll homing, a mold corresponding to the width of the tank in the ventilation direction is required, and there is a problem that various molds must be prepared. there were.

Further, in the configuration of the heat exchanger disclosed in the above publication, a dimensional error or the like occurs between the width of the first tank and the width of the partition in the width direction, and the gap between the inner surface of the first tank and the partition is formed. When there is a gap, the heat exchange medium bypasses from one gap to the other compartment of the first tank from the gap, and the heat exchange capacity of the heat exchanger may be reduced.

Accordingly, the present invention reduces the number of molds for forming various types of tanks for use in cold regions and for rear seats, and eliminates the conventional situation in which a heat exchange medium bypasses a gap between an inner surface of a tank and a partition. It is an object of the present invention to provide a heat exchanger.

[0007]

SUMMARY OF THE INVENTION A heat exchanger according to the present invention comprises a pair of tanks, a number of tubes having a heat exchange medium passage communicating between the tanks, and a plurality of tubes interposed between the tubes. With the fins, a block through which the heat exchange medium flows is formed, and the amount of heat exchange between the air passing through the tubes and the heat exchange medium can be adjusted by selecting the number of blocks arranged in the ventilation direction. (Claim 1). For example, when installed in a tropical or subtropical vehicle or when used as a heater core for a rear seat, the number of blocks arranged in the ventilation direction is one. When used as a heater core mounted on a vehicle in a normal area, the number of blocks to be arranged in the ventilation direction is two. Further, when used as a heater core mounted on a vehicle for a cold region, the number of blocks to be arranged in the ventilation direction is set to three.

As described above, by setting the number of blocks to be arranged in the ventilation direction to be one or two or more, the width of the heat exchanger in the ventilation direction can be changed freely, and a heat radiation performance corresponding to each regional characteristic is provided. Heat exchanger can be provided. In addition, since the width of the tank itself constituting each block in the ventilation direction does not fluctuate, the molds forming the tanks can be shared, and the tanks constituting the heat exchangers for each region are shared by an automatic process using a common line. Can be manufactured. In addition, since the tank and the tank that face each other in the ventilation direction of each block are separate members, by treating one tank in the same manner as the conventional tank compartment, the heat exchange medium flows through the gap between the partition wall and the tank inner surface. No leakage occurs.

Further, in the heat exchanger according to the present invention, when a plurality of the blocks are arranged in the ventilation direction, the blocks are communicated with each other, the heat exchange medium is circulated, and the tanks at locations where communication is required are communicated with each other. A hole may be formed (claim 2). By adopting this configuration, when the flow of the heat exchange medium in one block is configured as one path, and the most downstream tank of one block communicates with the most upstream tank of the other block, Thus, it is possible to obtain a heat exchanger having a flow of a heat exchange medium similar to that of a normal counterflow type heat exchanger. When only a single block is used, the communication hole is not formed in the tank, but, for example, an inlet pipe is connected to one tank and an outlet pipe is connected to the other tank.

Here, when the communication hole formed between the tanks is a long hole extending in the longitudinal direction of the tank, the communication hole is formed according to the resistance of the heat exchange medium flowing from the one tank to the other tank. The width of the hole may be variable (claim 3). Thus, when the inlet pipe or the outlet pipe connected to the tank is located at the end side in the direction in which the tubes of the tank are arranged, the width of the elongated hole is increased at the other end side where the flow path resistance is greatest, and the inlet pipe or the outlet pipe is Is located closer to the center in the direction in which the tubes of the tank are arranged, it is possible to increase the width of the slot at both sides where the flow resistance is greatest, so that the temperature distribution can be equalized and heat exchange can be achieved. Vessel performance can be improved.

Further, when a plurality of communication holes formed in the tanks are arranged along the longitudinal direction of the tank, the holes are formed in accordance with the resistance of the heat exchange medium flowing from the one tank to the other tank. May be varied (claim 4). When the inlet pipe or the outlet pipe connected to the tank is located at the end in the direction in which the tubes are arranged in the tank, the communication hole at the other end having the largest flow path resistance is increased, and the inlet pipe or the outlet pipe is connected to the tank. If it is near the center of the tube juxtaposition direction, it is possible to enlarge the communication holes on both sides where the flow resistance is largest, so that the temperature distribution can be equalized and the performance of the heat exchanger can be improved. Can be improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show the structure of heat exchangers 1a and 1b used in an air conditioner for a vehicle. The heat exchanger 1a shown in FIG. 1 is used as a heater core for a warm region, and the heat exchanger 1b shown in FIG. 2 is used as a heater core for a cold region.

The heat exchanger 1a shown in FIG.
The heat exchanger 1b shown in FIG. 2 is configured by connecting the three blocks 2a, 2b ', 2c in the ventilation direction by connecting the two blocks 2a, 2b in the ventilation direction. The overall width in the ventilation direction of the heat exchanger 1b shown in FIG. 2 is larger by one block than the heat exchanger 1a shown in FIG. These blocks 2a, 2b, 2b 'and 2c have substantially the same basic form.

2 which constitutes the heat exchanger 1a shown in FIG.
The two blocks 2a and 2b are vertically arranged in a pair of elongated, substantially rectangular parallelepiped tanks 3a, and a plurality of tubes 4 are arranged side by side along the longitudinal direction of the tank 3b and have a heat exchange medium passage 5 therein (see FIG. 10). And formed by roll homing or pressing.) And corrugated fins 6 interposed between the tubes 4 and 4. And tank 3
The inlet / outlet pipes 7 and 8 are connected to a, and the tank 3b is formed with a communication hole 15 communicating with the adjacent tank 3b as described below.

As shown in FIG. 3 (a), the tank 3a is not in communication with an adjacent tank, and has an elongated cylindrical portion 9 open on both sides in the longitudinal direction, and an opening of the cylindrical portion 9. The tubular portion 9 is surrounded by four side peripheral surfaces 11, and an inlet pipe 7 or an outlet is provided near one longitudinal end of the upper surface of the tubular portion 9. A connection hole 13 for connecting the pipe 8 is formed, and a tube connection hole (not shown) similar to the upper surface of FIG.

As shown in FIG. 3 (b), the tank 3b communicates with an adjacent tank, and its basic form is common to the tank 3a. The same reference numerals are given and the description is omitted, and only different points will be described below. In the tank 3b, an elongated tube connection hole 14 is provided on the upper surface thereof in parallel with the longitudinal direction of the tubular portion 9, and a communication hole 15 is formed on a side surface thereof. With such a configuration, when the tanks 3b are joined to each other, the tanks 3b and the tanks 3b communicate with each other through the communication holes 15 as shown in FIG.

However, as shown in FIG.
In this heat exchanger 1, a two-pass structure is formed. That is, the heat exchange medium flowing into the tank 3a of the block 2a from the inlet pipe 7 reaches the tank 3b through the tube 4, and then passes through the communication hole 15 to the tank 3b of the block 2b.
Move to And the heat exchange medium is the block 2b
From the tank 3b through the tube 4 to the tank 3a, and then flows out of the outlet pipe 8 provided in the tank 3a.

The shape of the communication hole 15 may be a rectangular shape having a uniform width in the transverse direction of the tank.
When the pipes 7 and 8 are arranged near the longitudinal ends of the tank 3a, the width in the tank short direction is minimized at the side end where the pipes 7 and 8 are arranged as shown in FIG. ,
The width may gradually increase as it advances to the end opposite to the side where 8 is arranged. As shown in FIG. 5, the communication hole 15 is constituted by a plurality of circular holes 15a, and the diameter of the hole 15a is minimized at the side end where the pipes 7, 8 are arranged. May be gradually increased as it proceeds to the end opposite to the side where the is arranged.

When the pipes 7 and 8 are arranged near the center in the longitudinal direction of the tank 3a, not shown,
When the communication hole 15 formed in the tank 3b is formed of a series of holes, the width in the tank short direction is minimized at the center portion, and the width is gradually increased toward both sides. When the communication hole 15 is composed of a plurality of holes, the diameter of the hole located at the central portion is minimized, and the diameter is gradually increased toward both ends.

As described above, by making the communication hole 15 larger on the side remote from the inlet pipe 7 than near the side near the inlet pipe 7, the communication hole 15 passes through the heat exchange medium passage 5 of the tank 3 a and the tube 4 from the inlet pipe 7. When the heat exchange medium flowing into the tank 3b moves to the tank 3b of the adjacent block, the passage resistance on the side remote from the inlet pipe 7 can be reduced, so that the heat exchange medium is evenly distributed to the adjacent tank 3b. And the performance of the heat exchanger can be improved.

The tank 3 to which the inlet pipe 7 is connected
As shown in FIG. 6, as shown in FIG. 6, if the bulging portion 12 is formed on the side peripheral surface 11 of the cylindrical portion 9, the step 16 extending in the longitudinal direction of the cylindrical portion 9 faces the inside thereof. Alternatively, the baffle plate 17 may be placed using the step portion 16. In FIG. 6, the baffle plate 17 is formed by forming a plurality of elongated slit holes 19 in parallel in the flat plate 18 and inclining guides for guiding the heat exchange medium to one peripheral edge in the longitudinal direction in the slit holes 19. Although it is configured by forming the piece 20, any configuration may be used as long as the heat exchange medium flowing from the inlet pipe 7 can be prevented from flowing directly to the tube 4 directly below due to inertia.

Further, the cylindrical portion 9 of each of the tanks 3a, 3b
As shown in FIG. 10, a thin aluminum bracing sheet may be formed by folding in a multi-stage by roll homing or pressing. In this case, it is desirable in the manufacturing process that the connection hole 13 and the communication hole 15 are formed in advance before the bending process. Then, the joining between the ends of the plate is as shown in FIG.
As shown in FIG. 3, an engaging portion 21 which is curved in an inwardly arc shape is formed in an end portion of a portion 9a forming an upper surface in a bending step, and a circular outer portion is formed on an end portion of a portion 9b forming a side surface. There is a method in which the engaging portion 22 curved in an arc shape is formed in a bending process, and the engaging portion 21 and the engaging portion 22 are engaged with each other on the upper surface side of the tubular portion 9. . Then, as shown in FIG. 8, there is a method in which the process is performed by overlapping the end of the portion 9b forming the side surface with the end of the portion 9a forming the upper surface. As shown in FIG. 9, a substantially L-shaped claw 2 is provided at an end of a portion 9a forming an upper surface.
3 is formed in the bending step, and a U-shaped claw 24 is formed in the end of the portion 9b forming the side face in the bending step, and the claw 23 and the claw 24 There is also a method of performing this by engaging on the side.

As described above, the heat exchanger 1b shown in FIG. 2 uses three blocks 2a, 2b 'and 2c. Therefore, the width of the heat exchanger 1b in the ventilation direction is the same as that shown in FIG. It is 1.5 times larger than the width in the ventilation direction.

The blocks 2b 'and 2c are basically the same as the blocks 2a and 2c described above.
2b, the same components such as the tube 4, the fins 6, and the tube insertion holes 14 are denoted by the same reference numerals, and description thereof will be omitted. Only different configurations will be described below.

The block 2b constituting the heat exchanger 1b
And the tank 3a of the block 2c, like the tank 3a shown in FIG. 3 (a), is composed of a tubular portion 9 and a closed portion 10, while one side surface of the tubular portion 9 on the ventilation direction side. A communication hole 26 is formed in the tank 2a, so that when the tank 3a of the block 2b 'and the tank 3a of the block 2c are in contact with each other, the two tanks 3a communicate with each other. An outlet pipe 8 is formed in the tank 3b of the block 2c.

However, as shown in FIG.
In this heat exchanger 1b, a three-pass structure is formed. That is, the heat exchange medium that has entered the tank 3a of the block 2a from the inlet pipe 7 reaches the tank 3b through the tube 4, and moves from the tank 3b to the tank 3b of the block 2b 'through the communication hole 15, and further. It reaches the tank 3a through the tube 4. And the heat exchange medium is
After passing from a to the tank 3a of the block 2c via the communication hole 26, the tank 3a passes through the tube 4 to the tank 3b, and flows out of the outlet pipe 8 provided in the tank 3b.

However, the heat exchanger 1b using three blocks is not necessarily limited to a three-pass structure, and may be a two-pass structure. Less than,
FIG. 1 shows an example of the heat exchanger 1b having the two-pass structure.
1 and FIG. The heat exchanger 1 described above, such as the tube 4, the fins 6, the baffle plate 17, etc.
The same components as those of a and 1b are denoted by the same reference numerals, and description thereof is omitted.

The heat exchanger 1b shown in FIG. 11 has three blocks 2a like the heat exchanger 1b shown in FIG.
, 2b '' and 2c 'are used, and therefore the width of the heat exchanger 1b in the ventilation direction is 1.5 times larger than that of the heat exchanger 1a shown in FIG. .

The most characteristic block among the blocks 2a ', 2b'', and 2c' constituting the heat exchanger 1b is 2b ''. The block 2b '' is composed of the tank 3a shown in FIG. ), The inside is partitioned into two compartments 28 and 29 by a partition wall 27 extending in the ventilation direction at substantially the center in the stacking direction, and the communication hole 26 is formed.
However, it is formed so as to be alternate with the upstream side in the ventilation direction in the image room 28 and the downstream side in the ventilation direction in the image room 29. Although not shown, the tank 3b of the block 2b '' has a through hole 15 having the same shape as the communication hole 15 shown in FIG.

In the block 2c ', a communication hole 15 is formed at a position corresponding to the communication hole 15 of the tank 3a of the block 2b "on the upstream side in the ventilation direction of the tank 3a. The tank 3a communicates only with the image chamber 29 side of the tank 3a of the block 2b ''. The tank 3b of the block 2c 'has a communication hole 1 having the same shape as the communication hole 15 shown in FIG.
5 are formed and communicate with the tank 3b of the block 2b ''.

The block 2a 'has a communication hole 15 formed at a position corresponding to the communication hole 15 formed in the tank 3a of the block 2b''on the downstream side in the ventilation direction of the tank 3a. 2a 'tank 3
“a” communicates only with the image room 28 side of the tank 3a of the block 2b ″.

However, as shown in FIG. 12, the heat exchanger 1b forms a two-pass structure with different paths on the inlet pipe 7 side in the stacking direction and on the outlet pipe 8 side in the stacking direction. That is, on the inlet pipe 7 side in the stacking direction, as shown in FIG. 12A, the heat exchange medium that has entered the tank 3a of the block 2a 'from this inlet pipe is:
After reaching from the tube 4 to the tank 3b, a flow of shifting to the tank 3b of the block 2b '' via the communication hole 15;
After the transfer to the tank 3a of the block 2b '' via the communication hole 26, a flow from the tube 4 of the block 2b '' to the tank 3b is formed. Then, the heat exchange medium is transferred from the tank 3b of the block 2b '' to the block 3c.
After passing through the communication holes 15 and 15 into the tank 3b, the tank 3b passes through the tube 4 from the tank 3b.
And flows out from the outlet pipe 8 provided in the tank 3a. On the other hand, on the outlet pipe 8 side in the stacking direction, as shown in FIG. 12 (b), the heat exchange medium that has entered the tank 3a of the block 2a 'from this inlet pipe is
After reaching the tank 3b from the tube 4, the flow shifts to the tank 3b of the block 2b '' via the communication hole 15. Then, after the heat exchange medium reaches the tank 3a from the tank 3b of the block 2b '' through the tube 4, the communication holes 26
Through the outlet pipe 8 provided in the tank 3a and the communication hole 15 from the tank 3b of the block 2b ''.
After passing through the tank 3a of the block 2c 'through the tube 4, it reaches the tank 3a through the tube 4, and forms a flow flowing out of the outlet pipe 8 provided in the tank 3a.

However, by adopting such a structure of the heat exchanger 1b, the inlet pipe 7 and the outlet pipe 8 are on the same side, so that the piping becomes easy, and the heat exchanger 1b shown in FIG.
Exchanger 1b using two blocks 2a, 2b ', 2c
The flow path resistance is reduced because the total passage area is larger than that of the heat exchanger 1a, and the heat radiation area is increased 1.5 times and the heat radiation amount is larger than that of the heat exchanger 1a using the two blocks 2a and 2b shown in FIG. The size can be surely increased.

On the other hand, the heat exchanger 1c shown in FIG.
It is used as a heater core for a region having a high temperature or for a rear seat, and only one block 2a '' is selected. For this reason, the width in the ventilation direction of the heat exchanger 1c is smaller than the width in the ventilation direction of the heat exchanger 1a shown in FIG. The basic configuration of the block 2a ″ is substantially the same as that of the block 2a described above. Therefore, the same reference numerals are given to the same components such as the tank 3a, the tubes 4, the fins 6, and the baffle plate 17. A description thereof will be omitted, and only different configurations will be described below.

The block 2a constituting the heat exchanger 1c
The “tank 3b” has the basic form shown in FIG.
Similarly to the tank 3b shown in FIG.
The tube connection hole 14 is formed on the upper surface of the cylindrical portion 9, but the communication hole 15 is not formed on the side surface, and the outlet pipe 8 is connected to the bottom surface. A connection hole (not shown) is formed.

Therefore, as shown in FIG. 13 (b), the heat exchanger 1c is connected to the tank 3a through the inlet pipe 7.
The heat exchange medium entering the tank 3b passes through the tube 4
, And flows out from the outlet pipe 8 provided in the tank 3b, thus forming a one-pass structure. However, if necessary, the tank 3a may be further divided into two compartments, and an entrance / exit pipe communicating with each compartment may be provided to form a two-pass structure.

As described above, the heat exchangers 1a, 1a ', 1
The width in the ventilation direction of a '', 1b, 1b ', 1b'', 1c, 1c' can be freely varied by appropriately selecting the number of blocks, and the tanks 3a, 3b constituting each block Since the width in the ventilation direction does not fluctuate, a mold for forming the tanks 3a and 3b is not required according to the width in the ventilation direction when forming the tanks 3a and 3b. This eliminates the necessity and can reduce the manufacturing cost. Further, the formation of the entire shape of the tank can be performed on a common production line.

In addition, the heat exchanger 1 shown in FIGS.
Since the completely common tanks 3a and 3b, tubes 4 and fins 6 are used in a and 1b, the entire production line for the heat exchangers 1a and 1b having two or more blocks can be shared. Further, the heat exchanger 1 shown in FIG.
a and the heat exchanger 1b shown in FIG. 11, a common member is used for the tube 4 and the fin 6, and the tank has the same overall shape.
Since there is only a difference between the presence or absence of 5, 26, the shape thereof, and the presence or absence of the connection hole 13, the production line of the heat exchanger is made common to all and most of the production lines of the heat exchanger having two or more blocks. be able to. Therefore, when manufacturing heat exchangers having different ventilation direction widths according to the local environment, it is not necessary to form a heat exchanger production line for each ventilation direction width of the heat exchanger.

[0040]

As described above, according to the invention described in any one of the claims, the width of the heat exchanger in the ventilation direction can be freely changed by selecting one or two or more blocks arranged in the ventilation direction. In addition, it is possible to provide a heat exchanger having a heat radiation amount corresponding to each regional characteristic. Moreover, since the width of the tank itself constituting each block in the ventilation direction does not fluctuate, the mold that forms the tank can be used in common, and the manufacturing cost of the heat exchanger can be reduced. Also,
By making it possible to mold with a common mold in this way, the tanks constituting the heat exchangers for each region can be manufactured on a common line by an automatic process.

Furthermore, since the tank of each block and the tank are separate members, the heat exchange medium leaks from the gap between the partition wall and the tank inner surface by treating one tank in the same manner as the conventional tank compartment. Can be reliably prevented.

[Brief description of the drawings]

FIG. 1A is a perspective view of a heat exchanger in a case where the number of blocks is set to two, and FIG.
It is the schematic of the flow of the heat exchange medium which flows in the said heat exchanger.

FIG. 2A is a perspective view of a heat exchanger in a case where the number of blocks is set to three, and FIG.
It is the schematic of the flow of the heat exchange medium which flows in the said heat exchanger.

3 (a) is a perspective view of a tank to which an inlet / outlet pipe of the heat exchanger is attached, and FIG. 3 (b)
It is a perspective view of a tank which has a communication hole for communicating with a tank adjacent to the heat exchanger.

FIG. 4 is a cross-sectional view showing a state in which tanks of the heat exchanger communicate with each other.

FIG. 5 is a perspective view of a tank having a communication hole having a different form from the communication hole of the tank shown in FIG. 3 (b).

FIG. 6A is a partially cutaway view showing a state in which a baffle plate is arranged in a tank to which an inlet pipe is attached, and FIG. 5B is a sectional view of the tank.

FIG. 7 is a cross-sectional view illustrating a joint structure between ends of the plate when the side peripheral surface of the tank is formed by a single plate.

FIG. 8 is a cross-sectional view showing a joining structure different from that of FIG. 6 in a case where the side peripheral surface of the tank is formed by one plate.

FIG. 9 is a cross-sectional view showing a joint structure different from FIGS. 6 and 7 when the side peripheral surface of the tank is formed of one plate.

FIG. 10 is an enlarged view of an end portion of a tube formed by bending in multiple stages by roll homing or pressing.

FIG. 11 (a) is a perspective view of a heat exchanger having a two-pass structure while selecting three blocks, and FIG.
FIG. 1 (b) is a side view showing a structure of a tank used for a central block of the heat exchanger.

FIG. 12 (a) is a schematic diagram of a flow of a heat exchange medium in a laminating direction on an inlet pipe side of the heat exchanger, and FIG. 12 (b) is a schematic diagram of an outlet pipe side of the heat exchanger. It is a schematic diagram of a flow of a heat exchange medium in a lamination direction.

FIG. 13 (a) is a perspective view of the heat exchanger when the number of blocks is selected as one, and FIG.
(B) is a schematic diagram of a flow of a heat exchange medium flowing in the heat exchanger.

[Explanation of symbols]

1a, 1b, 1c Heat exchangers 2a, 2a ', 2a ", 2b, 2b', 2b", 2
c, 2c 'Block 3a, 3b Tank 4 Tube 5 Heat exchange medium passage 6 Fin 7 Inlet pipe 8 Outlet pipe 9 Cylindrical part 10 Blocking part 11 Side peripheral surface 12 Swelling part 13 Connection hole 14 Tube connection hole 15 Communication hole 16 Step 17 Baffle plate 18 Flat plate 19 Slit hole 20 Guide piece 21 Engagement part 22 Engagement part 23 Claw 24 Claw 26 Communication hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shin Kurihara 39, Higashihara, Chiyo-ji, Odai-gun, Osato-gun, Saitama Prefecture Inside of Zexel Gangnam Plant (72) Katsuji Akiyama 39, Higashihara, Chiyo-ji, Konan-cho, Osato-gun, Saitama Address F-term in Zexel Gangnam Plant (reference) 3L065 DA13 FA19 3L103 AA01 AA06 AA13 BB38 CC23 DD18 DD32 DD34 DD42

Claims (4)

[Claims] 1. A block through which a heat exchange medium flows is formed by a pair of tanks, a number of tubes provided with a heat exchange medium passage communicating between the tanks, and fins interposed between the tubes. A heat exchanger characterized in that the number of heat exchanges between the air passing through the tubes and the heat exchange medium can be adjusted by selecting the number of blocks arranged in the ventilation direction. 2. When a plurality of the blocks are arranged in the ventilation direction, the blocks are communicated with each other to allow a heat exchange medium to flow therethrough, and communication holes are formed in tanks where communication is required. The heat exchanger according to claim 1, wherein 3. When the communicating hole formed between the tanks is a long hole extending in the longitudinal direction of the tank, the long hole is formed according to the resistance of the heat exchange medium flowing from the one tank to the other tank. The heat exchanger according to claim 2, wherein the width of the heat exchanger is variable. 4. When a plurality of communication holes formed in the tanks are arranged along the longitudinal direction of the tank, the holes are formed according to the resistance of the heat exchange medium flowing from the one tank to the other tank. The heat exchanger according to claim 2, wherein the size of the heat exchanger is varied.