JP2000180087A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating heat exchanger, e.g. a heater core, in which routing of cooling water piping can be facilitated by taking out first and second inlet pipes and an outlet pipe from same direction while suppressing increase of dead space, e.g. dimensional increase a top capsule in the height direction, as much as possible. SOLUTION: A car air conditioner comprises an air conditioning unit where the air conditioning zones of left and right seats in a cabin can be subjected to independent temperature control, and a heating heat exchanger 5, e.g. a heater core, disposed in the air conditioning unit. The heating heat exchanger 5 can take out first and second inlet pipes 17, 18 and an outlet pipe 19 not from the depth direction of a top capsule 23 but from the side wall at one end thereof in the breadthwise direction, i.e., from same circumferential direction of the top capsule 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger suitable for a heating heat exchanger such as a heater core for heating air flowing into a vehicle cabin, and more particularly to an air conditioning zone for a right seat in a vehicle cabin. The present invention relates to a heat exchanger installed in an air conditioning unit of a left and right independent temperature control type capable of independently controlling the temperature of an air conditioning zone of a left seat and an air conditioning zone of a left seat.

[0002]

2. Description of the Related Art In recent years, air conditioning units of right and left independent temperature control systems for independently controlling the temperature of an air conditioning zone of a right seat and an air conditioning zone of a left seat in a vehicle cabin have been widely used. Inside the air-conditioning duct of such an air-conditioning unit, there is a right-seat ventilation path for blowing out conditioned air toward the occupants of the right seat in the passenger compartment and a conditioned air for blowing the conditioned air toward the left-seat passengers in the passenger compartment. A partition plate for partitioning the left seat ventilation path is provided.

[0003] An evaporator as a cooling heat exchanger for cooling air and a heater core as a heating heat exchanger for heating air are provided with air flowing in a right seat ventilation channel and a left seat ventilation channel. It is arranged so as to penetrate the above-mentioned partition plate so that it can exchange heat with flowing air.

Here, the temperature of the air blown into the passenger compartment is controlled by using one or more flow control valves provided in a cooling water circuit of the hot water type heating device, and is exposed in the ventilation passage for the right seat. By independently adjusting the flow rate of the cooling water flowing in the one core portion and the flow rate of the cooling water flowing in the second core portion exposed in the ventilation passage for the left seat, left and right independent temperature control is realized.

[0005] In the right and left independent temperature control type heater core, both end faces in the front-rear (depth) direction and both end faces in the width direction with respect to the ceiling face facing the flow direction of the cooling water in the plurality of tube groups are substantially formed. A box-shaped container-shaped capsule bent at a right angle is joined to an inlet end of a first core unit composed of a plurality of tube groups and an inlet end of a second core unit composed of a plurality of tube groups.

In the left and right independent temperature control type heater core, a plurality of partitioning plates are provided in the capsule so that the inner space of the capsule is connected to a first inlet tank communicating with the inlet of the first core. It is divided into a second inlet tank part communicating with the inlet side of the second core part and an outlet tank part communicating with the outlet sides of the first and second core parts.

The increase in dead space in the heater core which does not contribute to the heat exchange between the cooling water and the air, specifically, the suppression of the increase in the height of the capsule, the right seat for the air conditioning unit, the left seat, By keeping the pipes from being exposed in the ventilation passage for seats, the first and second cores are cooled in the first inlet tank for the purpose of maintaining the ease of sealing. The first inlet pipe through which water flows in is taken out from one end face in the width direction of the capsule, and the second inlet pipe through which cooling water flows into the second inlet tank is connected to the other end face in the width direction of the capsule ( From the opposite end face).

[0008]

However, in the heater core of the right and left independent temperature control type, since the first inlet pipe and the second inlet pipe are taken out from the box-shaped container-shaped capsule in exactly opposite directions. In addition, the arrangement of the cooling water piping becomes complicated, the workability of the piping arrangement work becomes poor, and the problem that the assembling cost of the entire hot water heating apparatus for a vehicle increases remarkably.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to minimize the increase in dead space such as an increase in the height dimension of a tank,
An object of the present invention is to provide a heat exchanger capable of facilitating the routing of a heat medium pipe by taking out first and second inlet pipes and outlet pipes from substantially the same direction.

[0010]

According to the first aspect of the present invention, the first core portion communicates with the plurality of tube groups.
A heat medium flows into the first inlet tank from one end in the width direction of the box-shaped container-shaped tank in which the inlet tank and the second inlet tank communicating with the plurality of tube groups of the second core are formed. The first inlet pipe to be discharged and the second inlet pipe through which the heat medium flows into the second inlet tank are taken out.

Thus, the first inlet pipe from one end in the width direction of the tank, that is, from substantially the same direction in the circumferential direction of the tank, while minimizing an increase in dead space such as an increase in the height dimension of the tank. And the second inlet pipe can be easily taken out. This makes it easy to arrange the heat medium pipes, so that the workability of the work of arranging the heat medium pipes can be improved, and the assembly cost of the entire system can be reduced. Further, when repairing the heater core, the heater core can be easily removed from the unit, and the serviceability of the heater core is improved.

According to the second aspect of the present invention, at least the first core portion and the second core portion are hermetically partitioned by the seal member, and the plurality of tubes constituting the first core portion by the flow rate adjusting means. By adjusting the flow rate of the heat medium flowing in the group and the flow rate of the heat medium flowing in the plurality of tube groups constituting the second core part independently of each other, heat exchange with the heat medium flowing in the first core part is achieved. Air blowing temperature and second
The temperature of the heat medium flowing through the core and the temperature of the blown air for heat exchange can be adjusted independently of each other.

Further, by taking out the first inlet pipe and the second inlet pipe from one end in the width direction of the tank, the ventilation of the air conditioning unit formed in the depth direction substantially perpendicular to the width direction of the heat exchanger main body. The first inlet pipe or the second in the road
The inlet pipe is not exposed. Accordingly, when the heat exchanger is mounted in the ventilation path of the air conditioning unit, the first core portion and the second core portion can be easily airtightly separated by the seal member. The easiness of sealing with the part can be maintained.

According to the third aspect of the present invention, the first inlet pipe and the second inlet pipe are overlapped in the height direction of the tank, so that an increase in the depth dimension of the tank can be suppressed. According to the fourth aspect of the present invention, the first inlet tank is provided at one end in the width direction of the tank, and the second inlet tank is provided at the other end in the width direction of the tank. The inlet pipe and the second inlet pipe are both connected to one end in the width direction of the first inlet tank portion of the tank.

According to the fifth and sixth aspects of the present invention, the distal end of the second inlet pipe is formed in a non-circular pipe shape having a concave portion in a part of the circular pipe portion, and the second inlet pipe is formed in a non-circular shape. The third inlet pipe insertion hole is formed in a shape corresponding to the outer shape of the tip of the second inlet pipe, so that the second inlet pipe is inserted into the first inlet tank portion from the second inlet pipe insertion hole of the tank. The second inlet pipe can be easily positioned in the tank when assembling so as to fit into the third inlet pipe insertion hole of the partition plate, and the second inlet pipe is prevented from rotating in the tank. Can be.
This makes it very easy to assemble the second inlet pipe into the tank.

According to the seventh aspect of the present invention, the first tank and the second tank constitute a tank, and the height of the second tank is smaller than that of the first tank. Because the diameter is increased by the diameter, it is possible to take out the first inlet pipe and the second inlet pipe from substantially the same direction in the circumferential direction of the tank without inserting the second pipe into the first inlet tank portion. it can.

According to the eighth aspect of the present invention, the cylindrical body having the heat medium passage formed therein and communicating with the second inlet tank is formed such that the cylindrical direction is substantially the same as the width direction of the tank. At the top of the tank and superimposed in the height direction of the tank,
Even without inserting the second pipe into the first inlet tank portion, the first inlet pipe and the second inlet pipe can be taken out from substantially the same direction in the circumferential direction of the tank. Also, the second
The width dimension of the inlet pipe can be shortened by the dimension of the cylindrical body in the cylinder direction.

According to the ninth aspect of the present invention, the heat medium flowing into the first core portion passes from the first core portion to the other end portion in the height direction of the first core portion through the plurality of first going tube groups. And flows from the other end in the height direction of the first core portion to one end portion through the plurality of first return tube groups. The heat medium flowing into the second core portion flows from one end in the height direction of the second core portion to the other end through a plurality of second going tube groups,
It flows from the other end in the height direction of the second core portion to one end portion through the plurality of second return tube groups. Thereby, the heat medium flows so as to make a U-turn in the first core portion, and the heat medium flows so as to make a U-turn in the second core portion.

According to the tenth aspect of the present invention, the outlet pipe through which the heat medium flows out from the inside of the outlet tank portion is taken out from one end in the width direction of the tank, so that both the first pipes from substantially the same direction are taken out. , The second inlet pipe and the outlet pipe can be taken out. Further, by arranging the first and second inlet pipes and the outlet pipe so as to be overlapped in the depth direction of the tank, the first and second inlet pipes and the outlet pipe are overlapped in the height direction of the tank. As compared with the case, the height dimension of the tank can be reduced.

According to the eleventh aspect of the present invention, the distal end of the outlet pipe is formed in a flat tubular shape, and the outlet pipe insertion hole is formed in a shape corresponding to the outer shape of the distal end of the outlet pipe. Even if the first inlet pipe, the second inlet pipe, and the outlet pipe are overlapped in the depth direction of the tank, it is possible to suppress an increase in the depth dimension of the tank.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of First Embodiment] An embodiment of the present invention will be described with reference to the drawings based on an embodiment. Here, FIG. 1 is a diagram showing a circuit diagram illustrating a cooling water circuit of a vehicle air conditioner, and FIGS. 2 and 3A and 3B are diagrams showing a main structure of a heating heat exchanger. It is.

The vehicle air conditioner of this embodiment includes an air conditioning unit employing a reheat type temperature control system, and a cooling water circuit 2 using cooling water for cooling a water-cooled engine 1 as a heat source for heating. I have. The air conditioning unit
An air-conditioning duct in which a first ventilation path that blows air-conditioning air toward the air-conditioning zone of the right seat in the vehicle compartment and a second ventilation path that blows air-conditioning air toward the air-conditioning zone of the left seat in the vehicle interior are partitioned by a partition plate or the like. It has.

Here, first air outlets such as a driver side face air outlet and a driver side foot air outlet are open at an air downstream end of the first air passage, and at an air downstream end of the second air passage. First air outlets such as a passenger side face air outlet and a passenger side foot air outlet are open. The air conditioning unit constitutes an air conditioning unit of a left-right independent temperature control system capable of independently controlling the temperature of the air conditioning zone of the right seat in the vehicle compartment and the air conditioning zone of the left seat in the vehicle compartment.

A water jacket 3 is provided between the cylinder block and the cylinder head of the engine 1. The cooling water circuit 2 forcibly circulates the cooling water warmed in the water jacket 3 to a heating heat exchanger 5 such as a heater core by the operation of a water pump 4 to heat the vehicle hot water for heating the vehicle interior. Constructs a hot water circuit for a heating system.

The heating heat exchanger 5 is a front-rear U-turn type heat exchanger installed in an air conditioning duct of an air conditioning unit, and comprises a first core portion 11 and a second core portion 12. Heat exchange between the first and second flow control valves 13 and 14 for independently adjusting the flow rate of the cooling water flowing in the first core section 11 and the flow rate of the heat medium flowing in the second core section 12; A substantially rectangular cylindrical upper tank 15 connected to the upper end of the heat exchanger body in the height direction, a substantially rectangular cylindrical lower tank 16 connected to the lower end of the heat exchanger body in the height direction, and a heat exchanger. It is composed of first and second inlet pipes 17 and 18 through which cooling water flows into the main body, and an outlet pipe 19 through which cooling water flows out of the heat exchanger body.

The first core portion 11 is disposed in a first ventilation path of the air conditioning duct, and is composed of a first tube group arranged in a plurality of rows in a width direction of the heating heat exchanger 5. The air is heated by exchanging heat between the cooling water flowing inside and the air passing outside. Further, the second core portion 12 is disposed in a second ventilation path of the air conditioning duct, and is composed of a plurality of second tube groups arranged in the width direction of the heating heat exchanger 5. The air is heated by exchanging heat between the cooling water flowing through the air and the air passing through the outside.

The plurality of first and second tube groups are
The heating heat exchangers 5 are arranged in two columns in the depth direction (front-back direction). And a plurality of 1st tube groups are a plurality of 1st going tube groups by which cooling water flows from the upper end of the height direction of the 1st core part 11 to the lower end,
And a plurality of first return tube groups that are arranged downstream of the first going tube group in the air and through which the cooling water flows from the lower end to the upper end in the height direction of the first core portion 11.

The plurality of second tube groups include a plurality of second going tube groups through which the cooling water flows from the upper end in the height direction of the second core portion 12 to the other end thereof, and the second tube group.
A plurality of second return tube groups are disposed on the downstream side of the air from the outgoing tube group and through which the heat medium flows from the other end in the height direction of the second core portion 12 toward one end.

Each of the tubes 6 constituting the plurality of first and second going tube groups and the plurality of first and second returning tube groups is made of an aluminum alloy material (cladding material) whose surface is coated with a brazing material. , Formed in a flat tubular shape. A corrugated fin 7 made of an aluminum alloy for improving heat exchange (radiation) performance is joined between the adjacent tubes 6 by brazing. Further, side plates 8 and 9 for holding the first and second core portions 11 and 12 are joined to both ends in the width direction of the first and second core portions 11 and 12 by brazing.

The first and second flow control valves 13 and 14 correspond to flow control means of the present invention, and include a cooling water pipe (branch pipe) 21 connected to the first and second inlet pipes 17 and 18.
Each of them is installed in the middle of 22. The first of these,
The second flow control valves 13 and 14 include first and second core portions 11 and
By adjusting the flow rate of the cooling water flowing into the inside 12, the amount of heating of the air passing through the first and second core portions 11 and 12 is controlled so that the blowout temperatures can be changed independently of each other.

The upper tank 15 is formed by bending and brazing a substantially cross-shaped plate material, and is formed into a bottomed box-shaped container having a top capsule (a so-called folded capsule) 23, and an opening side of the top capsule 23. And a sheet metal 24 formed with a plurality of flat holes (not shown) for inserting the upper end in the height direction of the two-row column tube 6. The size of the top capsule 23 in the height direction is 4 mm for a normal heater core of 17 mm because two inlet pipes are arranged and connected in the height direction of the upper tank 15.
It is about 0.4 mm. And the top capsule 23
The sheet metal 24 is made of an aluminum alloy material (cladding material) whose surface is coated with a brazing material.

The upper tank 15 is provided with a separator (corresponding to a partition plate of the present invention) 34 for partitioning the internal space of the top capsule 23 into an inlet tank portion and an outlet tank portion 33 described later. . In addition, the internal space of the inlet tank is divided into the first inlet tank 31 and the second
A separator (corresponding to a partition plate of the present invention) 35 that is partitioned from the inlet tank 32 is provided.

The first inlet tank section 31 is connected to the inlet side end of the plurality of first going tube groups. The second inlet tank 32 is connected to the inlet-side ends of the plurality of second going tube groups. The first inlet tank part 31 and the second inlet tank part 32 are installed adjacent to each other in the width direction of the heat exchanger body. And the outlet tank part 33 is provided with a plurality of first,
It is connected to the outlet side end of the second return tube group.

The lower tank 16 is connected to the bottom capsule 25 in the form of a box with a bottom by brazing to the opening side of the bottom capsule 25, and is used to insert the lower end of the two-row column tube 6 in the height direction. And a sheet metal 26 formed with a plurality of flat holes (not shown). Bottom capsule 25 and sheet metal 26
Is made of an aluminum alloy material (cladding material) whose surface is coated with a brazing material.

The lower tank 16 has a first intermediate tank portion 36 connecting the internal space of the bottom capsule 25 to the outlet side end of the plurality of first going tube groups and the inlet side end of the plurality of first returning tube groups. A separator 38 is provided for partitioning into the second intermediate tank portion 37 connected to the outlet side ends of the plurality of second going tube groups and the inlet side ends of the plurality of second returning tube groups.

The first and second inlet pipes 17 and 18 are made of an aluminum alloy material (cladding material) whose surface is coated with a brazing material.
And is formed in a circular tube shape. And the first,
The upstream ends of the second inlet pipes 17 and 18 are connected to the cooling water pipe 2.
1, 22 and 27, and communicates with the outlet of the water jacket 3 of the engine 1;
5 and the first and second inlet tank portions 31 and 32.

As shown in FIGS. 2 and 3A, the opening direction (downward in the height direction) of the upstream end of the first inlet pipe 17 is the opening direction (downward in the width direction) of the downstream end. On the other hand, it is located in a direction substantially perpendicular to (i). The downstream end of the first inlet pipe 17 is fitted into a circular first inlet pipe insertion hole 41 formed on one side wall in the width direction of the top capsule 23.

The opening direction of the upstream end of the second inlet pipe 18 (forward in the front-rear direction) is shown in FIGS.
As shown in (a), it is located in a direction substantially perpendicular to the opening direction (the other in the width direction) of the downstream end. And
The second inlet pipe 18 has a circular pipe-shaped penetrating portion (not shown) that is fitted into a circular second inlet pipe insertion hole 42 formed on one side wall in the width direction of the top capsule 23.
Is provided.

The downstream end of the second inlet pipe 18 is fitted into a third inlet pipe insertion hole 43 formed in the separator 35. As shown in FIG. 3B, the downstream end of the second inlet pipe 18 is formed in a non-circular pipe shape having a concave portion 44 in a part of the circular pipe portion. Then, the third inlet pipe insertion hole 4 of the separator 35
3 is formed in a non-circular shape corresponding to the outer shape of the downstream end of the second inlet pipe 18.

In the second inlet pipe 18, an intermediate portion (a pipe inserted into the tank) 45 from the penetrating portion to the downstream end is inserted into the first inlet tank portion 31 of the top capsule 23. That is, the second inlet pipe 18 has a length corresponding to the pipe-direction dimension of the insertion pipe 45 in the tank.
It is formed longer than 7.

The outlet pipe 19 is made of an aluminum alloy material (cladding material) whose surface is coated with a brazing material. The upstream end of the outlet pipe 19 is connected to the upper tank 15.
And a downstream end thereof communicates with a suction port of the water pump 4 through a cooling water pipe 29.

The opening direction of the upstream end of the outlet pipe 19 (the other side in the width direction) is, as shown in FIGS. 2 and 3A, the opening direction of the downstream end (one side in the width direction). ) Are located on the same plane. The upstream end of the outlet pipe 19 is fitted into an oval outlet pipe insertion hole 47 formed on one side wall in the width direction of the top capsule 23. The other part of the outlet pipe 19 is formed in a circular pipe shape.

Therefore, the first and second inlet pipes 17,
The outlet pipe 19 and the outlet pipe 19 are taken out from one end side wall (one end face) in the width direction of the top capsule 23, that is, from the same direction as the top capsule 23. Further, in order to take out the first and second inlet pipes 17 and 18 and the outlet pipe 19 from one end face of the limited top capsule 23, the first inlet pipe 17 and the second inlet pipe 18 are connected to the height of the top capsule 23. While overlapping in the direction,
The outlet pipe 19 and the first and second inlet pipes 17 and 18 are overlapped in the depth direction of the top capsule 23, and the upstream end of the outlet pipe 19 is formed into a flat elliptic pipe shape.

[Manufacturing Method of First Embodiment] Next, a brazing method of the heating heat exchanger 5 of the present embodiment will be briefly described with reference to FIGS.

The top capsule 2 of the upper tank 15
First, a flat plate material made of an aluminum alloy is formed into a substantially cross shape by punching out a press, leaving a brazing margin, and four corners of the ceiling wall are bent in a substantially right angle direction.
A box-shaped bottomed container is formed by overlapping two side walls (side walls at both ends in the width direction and front and rear walls in the depth direction) with respective brazing margins.

Subsequently, the first and second inlet pipes 17, 18
The first and second inlet pipe insertion holes 41 and 42 and the outlet pipe insertion hole 47 to which the outlet pipe 19 is connected are formed in one end surface in the width direction of the box-shaped bottomed container by press punching. At this time, the first and second inlet pipe insertion holes 41 and 42 are formed in a circular shape, and the outlet pipe insertion hole 47 is formed in a flat (elliptical) shape.

The upper ends of the plurality of tubes 6 are inserted into the flat holes formed in the sheet metal 24 of the upper tank 15, and the lower ends of the plurality of tubes 6 are similarly formed in the sheet metal 26 of the lower tank 16. Into the flat hole. Then, the side plates 8 and 9 are attached to both ends of the first and second core portions 11 and 12 configured by sandwiching the corrugated fins 7 between the adjacent tubes 6.

Next, after assembling the separators 34 and 35 at predetermined positions of the sheet metal 24, the separators 3
The top capsule 23 is assembled so that the sheets 4 and 35 are sandwiched between the sheet metal 24. Similarly, after assembling the separator 38 at a predetermined position of the sheet metal 26, the bottom capsule 25 is assembled so that the separator 38 is sandwiched between the separator 38 and the sheet metal 26.

Next, the downstream end of the first inlet pipe 17 is inserted into a circular first inlet pipe insertion hole 41 formed on one side wall in the width direction of the top capsule 23, and the tip is inserted into the first inlet pipe 41. It faces inside the inlet tank 31. Similarly, the upstream end of the outlet pipe 19 is inserted into an oval-shaped outlet pipe insertion hole 47 formed on one side wall in the width direction of the top capsule 23, and the leading end faces the outlet tank 33. I do.

Then, the insertion pipe 45 of the second inlet pipe 18 into the tank is passed through the circular second inlet pipe insertion hole 42 formed on one side wall in the width direction of the top capsule 23, and the first inlet tank portion 31 is formed. And inserted into the non-circular third inlet pipe insertion hole 43 formed in the separator 35 so that the end faces the second inlet tank portion 32.
In addition, the third inlet pipe insertion hole 43 is provided with the second inlet pipe 1.
Since the shape is adjusted to the outer shape of the downstream end portion of 8, the tank insertion pipe 45 does not turn around in the top capsule 23, and the tank insertion pipe 45 is accurately positioned.

Next, the brazing material is melted in a furnace while supporting the assembled heating heat exchanger 5 with a jig, so that each joint of the components of the heating heat exchanger 5 is brazed. Attached. Then, the heating heat exchanger 5 is taken out of the furnace, and the heating heat exchanger 5 is cooled at room temperature, whereby the brazing operation of the heating heat exchanger 5 is completed.

[Operation of First Embodiment] Next, the operation of the air conditioner of this embodiment will be briefly described with reference to FIGS.

When the engine 1 is started, the cooling water warmed in the water jacket 3 circulates in the cooling water circuit 2 by the operation of the water pump 4. The cooling water flowing out of the water jacket 3 flows into the cooling water pipes 21 and 22 through the cooling water pipe 27, respectively. At this time, the opening degrees (openings) of the first and second flow control valves 13 and 14 are adjusted in accordance with the set temperature of the air conditioning zone of the right seat and the set temperature of the air conditioning zone of the left seat. Cooling water having a flow rate corresponding to the set temperature of each air conditioning zone flows into the cooling water pipes 21 and 22, respectively.

The cooling water flowing into the cooling water pipe 21 is supplied to the first inlet pipe 17 → the first inlet tank 31 → the plurality of first
Outgoing tube group → first intermediate tank section 36 → a plurality of first return tube groups → flow into the outlet tank section 33. on the other hand,
The cooling water flowing into the cooling water pipe 22 is supplied to the second inlet pipe 18 → the second inlet tank 32 → the plurality of second going tube groups → the second intermediate tank 37 → the plurality of second returning tube groups → the outlet tank. The coolant flows into the portion 33 and merges with the cooling water flowing from the first core portion 11 into the outlet tank portion 33. Then, the cooling water that has joined in the outlet tank section 33 passes through the outlet pipe 19 and the cooling water pipe 29 to the water jacket 3 of the engine 1.

When the cooling water flows inside the plurality of first and second going tube groups and the plurality of first and second returning tube groups, the cooling water flows in the first and second ventilation passages of the air conditioning duct. Heats air by exchanging heat with air. As a result, air having an outlet temperature corresponding to the set temperature of the air conditioning zone of the right seat is blown out from the driver side face air outlet or the driver side foot air outlet at the air downstream end of the first ventilation path, and the air conditioning zone of the right seat air conditioning zone. The inside is air-conditioned. On the other hand, air having an outlet temperature corresponding to the set temperature of the left seat air conditioning zone is blown out from the passenger seat side face outlet or the passenger seat foot outlet at the downstream end of the air in the second ventilation path, and the air is discharged into the left seat air conditioning zone. Is air-conditioned.

[Effects of the First Embodiment] As described above, the heating heat exchanger 5 of the present embodiment is provided in the depth direction of the top capsule 23 (the front-back direction of the first and second ventilation passages of the air conditioning duct).
Instead, one end side wall in the width direction of the top capsule 23,
That is, from the same direction (the width direction of the first and second ventilation paths of the air conditioning duct) in the circumferential direction of the top capsule 23,
The second inlet pipes 17 and 18 and the outlet pipe 19 are taken out.

Accordingly, the first and second inlet pipes 17 and 18 are not exposed in the first and second ventilation passages of the air conditioning duct, and the upper tank 15 and the lower tank 16 are easily covered with the seal member. The gap between the first and second core portions 11 and 12 and the inner wall surface of the air conditioning duct can be easily closed by the seal member, and the partition plate and the first and second core portions can be sealed by the seal member. Since the first and second core portions 11 and 12 of the heating heat exchanger 5 can be easily sealed, the first and second core portions 11 and 12 can be easily maintained.

The first inlet pipe 17 and the second inlet pipe 18 are overlapped in the height direction of the top capsule 23, and the outlet pipe 19 and the first and second inlet pipes 17, 18 are connected to the top capsule 23. 23 in the depth direction. Furthermore, the first and second inlet pipes 1
7 and 18 are all in the shape of a circular tube from the upstream end to the downstream end, but the upstream end of the outlet pipe 19 is formed in the shape of an oblong tube, so that the first and the second ends of the top capsule 23 are the same. The second inlet pipes 17 and 18 and the outlet pipe 19 are taken out. Thereby, an increase in the dead space which does not contribute to the heat exchange between the cooling water and the air in the depth dimension and the height direction of the top capsule 23 can be suppressed as much as possible.

Therefore, in other words, the top capsule 23
The first and second inlet pipes 1 from the same direction in the circumferential direction of
By taking out the outlet pipes 7 and 18 and the outlet pipe 19 in the same direction, the cooling water pipe 21 of the cooling water circuit 2 is compared with the case where the taking-out directions of the first inlet pipe 17 and the second inlet pipe 18 are completely opposite. , 22 and 29 can be facilitated, so that the workability of the pipe routing work can be improved, and the cost of assembling the entire cooling water circuit 2 of the vehicle hot water heating device can be reduced.

A non-circular pipe insertion hole formed in a partition plate that partitions the internal space of the capsule into a first inlet tank portion and a second inlet tank portion is provided at a tip end of the second inlet pipe. The second inlet pipe is positioned in the capsule by inserting the fitting part having a circular pipe shape. For this reason, workability at the time of integrally brazing the heat exchanger can be improved.

[Second Embodiment] FIG. 4 shows a second embodiment of the present invention, and FIG. 4 shows a main structure of a heating heat exchanger.

This embodiment has the following structure as a structure for taking out the first and second inlet pipes 17, 18 and the outlet pipe 19 from the same direction of the top capsule 23. Top Capsule 2 of Heating Heat Exchanger 5 of this Example
3 is a first top capsule 51 in which a first inlet tank portion 31 is formed, and a second inlet tank portion 3 inside.
2 are formed, and the first and second top capsules 51 and 52 are separately formed in a box shape with a bottom.

The second top capsule 52 is formed to have a height dimension larger than the first top capsule 51 by at least the diameter of the second inlet pipe 18.
The first inlet pipe 17 was taken out from one end side wall in the width direction of the first top capsule 51, and a downstream end (tip) was formed on one end side wall in the width direction of the first top capsule 51. It is joined by brazing while being fitted into a first inlet pipe insertion hole (not shown).

The second inlet pipe 18 is connected to the first inlet pipe 1
7 so as to be in the same direction as the second top capsule 52.
A second inlet pipe insertion hole (not shown) which is taken out from one end side wall in the width direction of the second top capsule 52 and formed on the one end side wall in the width direction of the second top capsule 52.
It is joined by brazing while being fitted inside. Further, the second inlet pipe 18 is provided at a position above the ceiling wall of the first top capsule 51 so as to be parallel to the longitudinal direction of the ceiling wall (the width direction of the first top capsule 51). It is installed so as to be superimposed.

The outlet pipe 19 is taken out from one side wall in the width direction of the first top capsule 51 so as to be in the same direction as the first and second inlet pipes 17 and 18.
The downstream end (tip) is joined by brazing in a state of being fitted into an outlet pipe insertion hole (not shown) formed on one side wall in the width direction of the first top capsule 51. The outlet pipe 19 and the first inlet pipe 17 are overlapped in the depth direction of the first top capsule 51.

Here, in the heating heat exchanger 5 such as a heater core installed in the air conditioning unit of the right and left independent temperature control type, the first core unit 1 for the air conditioning zone of the right seat is provided.
1 and a second inlet tank 3 communicating with the second core 12 for the air conditioning zone of the left seat.
In general, a separator is assembled in the top capsule 23 in order to partition the liquid crystal 2 in a liquid-tight manner.

However, 100% (completely independent) left and right independent temperature control is extremely difficult due to the effect of the internal leak (cannot be reduced to 0) between the first inlet tank 31 and the second inlet tank 32. However, as in the above structure, the top capsule 23 is connected to the two first,
With the configuration using the second top capsules 51 and 52, the internal leak between the first inlet tank 31 and the second inlet tank 32 can be reduced to zero.

Third Embodiment FIG. 5 shows a third embodiment of the present invention, and FIG. 5 is a diagram showing a main structure of a heat exchanger for heating.

In this embodiment, the following structure is provided as a structure for taking out the first and second inlet pipes 17, 18 and the outlet pipe 19 from the same direction of the top capsule 23. Top Capsule 2 of Heating Heat Exchanger 5 of this Example
3 has a separator (corresponding to a partition plate of the present invention) 61 that partitions the internal space of the top capsule 23 into a first inlet tank 31 and a second inlet tank 32.

Further, on the ceiling wall at one end side in the width direction of the top capsule 23, the cylindrical direction is set so as to be in the same direction as the width direction of the capsule.
Height direction (height direction of first and second core portions 11 and 12)
The cylindrical body 62 superimposed on is joined by brazing. Inside the cylindrical body 62, the second inlet tank 32
A cooling water flow path (not shown) communicating with the cooling water passage is formed.
At the other end in the width direction of the cylindrical body 62, an inflow port 64 opened corresponding to the communication port 63 formed in the ceiling wall of the top capsule 23 is formed.

The first inlet pipe 17 is taken out from one side wall in the width direction of the top capsule 23 and has a downstream end (tip) formed on one side wall in the width direction of the top capsule 23. 1 inlet pipe insertion hole (not shown)
It is joined by brazing while being fitted inside.

The second inlet pipe 18 is connected to the first inlet pipe 1
7 is taken out from the one end side wall in the cylinder direction of the cylindrical body 62 so as to be in the same direction as 7, and the downstream end (tip) is formed on the one end side wall in the width direction of the top capsule 23. It is joined by brazing in a state of being fitted into a 2 inlet pipe insertion hole (not shown).

The outlet pipe 19 is taken out from one end side wall in the width direction of the top capsule 23 so as to be in the same direction as the first and second inlet pipes 17 and 18 and has a downstream end (a tip end). ) Are joined by brazing in a state of being fitted into an outlet pipe insertion hole (not shown) formed in one side wall in the width direction of the top capsule 23. Further, the outlet pipe 19 and the first inlet pipe 17 are overlapped in the depth direction of the top capsule 23.

[Modification] In this embodiment, the present invention is applied to a heating heat exchanger such as a heater core installed in an air conditioning unit of a vehicle air conditioner. The present invention may be applied to a heating heat exchanger such as a condenser installed in an air conditioning unit, or may be applied to a cooling heat exchanger such as an evaporator installed in an air conditioning unit of a vehicle air conditioner. In the present embodiment, cooling water for cooling the engine 1 is used as the heat medium, but a refrigerant may be used as the heat medium.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a cooling water circuit of a vehicle air conditioner (first embodiment).

FIG. 2 is a front view showing the entire structure of the heating heat exchanger (first embodiment).

3A is a side view showing the entire structure of the heating heat exchanger, and FIG. 3B is a cross-sectional view taken along line AA of FIG. 2 (first embodiment).

FIG. 4 is a front view showing a main structure of a heating heat exchanger (second embodiment).

FIG. 5 is a front view showing a main structure of a heating heat exchanger (third embodiment).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Cooling water circuit 5 Heat exchanger for heating (heat exchanger) 11 1st core part 12 2nd core part 13 1st flow control valve (flow control means) 14 2nd flow control valve (flow control means) 15 Upper tank 17 First inlet pipe 18 Second inlet pipe 19 Outlet pipe 23 Top capsule 31 First inlet tank 32 Second inlet tank 33 Outlet tank 34 Separator (partition plate) 35 Separator (partition plate) 41 First inlet Pipe insertion hole 42 Second inlet pipe insertion hole 43 Third inlet pipe insertion hole 44 Concave part 47 Exit pipe insertion hole

Claims (11)

[Claims] (A) a first core portion formed by arranging a plurality of tube groups in a width direction, and a plurality of tube groups arranged in parallel in a width direction of the first core portion;
A heat exchanger body having a second core portion formed by arranging a plurality of tube groups in the width direction; and (b) a plurality of the first core portions on an inlet side of the plurality of tube groups and a plurality of the second core portions. A first inlet tank portion connected to the inlet side end of the tube group of the first core portion and communicating with the plurality of tube groups of the first core portion; A box-shaped container-shaped tank having a second inlet tank portion communicating with the plurality of tube groups of the two-core portion; and (c) being taken out from one end in the width direction of the tank and inserted into the first inlet tank portion. The first to flow the heat medium
(D) so as to be substantially in the same direction as the first inlet pipe,
A heat exchanger comprising: a second inlet pipe that is taken out from one end in the width direction of the tank and allows a heat medium to flow into the second inlet tank portion. 2. The heat exchanger according to claim 1, wherein a flow rate of a heat medium flowing through a plurality of tube groups forming the first core portion and a plurality of tube groups forming the second core portion are controlled. Heat exchange comprising: flow rate adjusting means for adjusting the flow rate of a flowing heat medium independently of each other; and a seal member for airtightly partitioning at least the first core portion and the second core portion. vessel. 3. The heat exchanger according to claim 1, wherein the first inlet pipe and the second inlet pipe are overlapped with each other in a height direction of the tank. Heat exchanger. 4. The heat exchanger according to claim 1, wherein the first inlet tank is provided at one end in a width direction of the tank, and the second inlet tank is provided. Is provided on the other end side in the width direction of the tank. 5. The heat exchanger according to claim 4, wherein the tank has a partition plate for dividing an internal space of the tank into the first inlet tank and the second inlet tank. The first inlet pipe is joined to the tank while being fitted into a first inlet pipe insertion hole formed on one end surface of the tank in the width direction, and the second inlet pipe is connected to the tank in a width direction of the tank. It is inserted into the first inlet tank portion from the second inlet pipe insertion hole formed on one end surface, and is joined to the tank while being fitted into the third inlet pipe insertion hole formed on the partition plate. Characterized heat exchanger. 6. The heat exchanger according to claim 5, wherein a tip portion of the second inlet pipe is formed in a non-circular pipe shape having a concave portion in a part of a circular pipe portion, and the third inlet pipe. The heat exchanger according to claim 1, wherein the insertion hole is formed in a shape corresponding to an outer shape of a tip portion of the second inlet pipe. 7. The heat exchanger according to claim 1, wherein the first tank is formed with the first inlet tank.
A second tank having a tank, and a height dimension larger than the first tank by the diameter of the second inlet pipe, and the second inlet tank portion being formed; It is taken out from one end in the width direction of the first tank, and the second inlet pipe is outward from one end in the width direction of the second tank so as to be substantially in the same direction as the first inlet pipe. A heat exchanger characterized by being taken out. 8. The heat exchanger according to claim 1, wherein the tank divides an internal space of the tank into the first inlet tank and the second inlet tank. A partitioning plate for partitioning, and a heat medium installed such that the cylinder direction is substantially the same as the width direction of the tank and overlapped in the height direction of the tank, and communicated with the second inlet tank portion inside A tubular body having a flow path formed therein, wherein the first inlet pipe is taken out from one end in the width direction of the tank, and the second inlet pipe is substantially in the same direction as the first inlet pipe. The heat exchanger is taken out from one end of the cylindrical body in the tube direction so as to be as follows. 9. The heat exchanger according to claim 1, wherein the plurality of tube groups of the first core portion are separated from one end in the height direction of the first core portion. A plurality of first-going tube groups through which the heat medium flows toward the end portion, and one downstream end portion of the first core portion which is arranged downstream of the first-going tube group in the air. A plurality of first return tube groups through which a heat medium flows toward the portion, and the plurality of tube groups of the second core portion are arranged from one end in the height direction of the second core portion to the other end. A plurality of second-going tube groups through which the heat medium flows, and a plurality of second-going tube groups, which are arranged downstream of the second-going tube groups on the downstream side of the air so that the heat flows from the other end in the height direction of the second core portion to one end. Heat exchange having a plurality of second return tube groups through which a medium flows . 10. The heat exchanger according to claim 9, wherein the tank communicates an internal space of the tank with the plurality of first going tube groups and the plurality of second going tube groups. A partition plate for partitioning an outlet of the plurality of first return tube groups and an outlet tank portion communicating with the outlets of the plurality of second return tube groups; and an outlet pipe for allowing a heat medium to flow out of the outlet tank portion. And the outlet pipe includes the first inlet pipe and the second
So as to be substantially in the same direction as the inlet pipe,
A heat exchanger taken out from one end in the width direction of the tank so as to overlap the inlet pipe and the second inlet pipe in the depth direction of the tank. 11. The heat exchanger according to claim 10, wherein the outlet pipe is joined to the tank while being fitted into an outlet pipe insertion hole formed in one end surface of the tank in the width direction, The heat exchanger according to claim 1, wherein a tip of the outlet pipe is formed in a flat tube shape, and the outlet pipe insertion hole is formed in a shape corresponding to an outer shape of the tip of the outlet pipe.