JP2001294029A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a heat exchanger capable of facilitating an arrangement of heating medium piping by practicing extensions of first and second inlet pipes and an outlet pipe from substantially the same direction while minimizing an increase of dead space such as an increase of size of a tank in a height direction. SOLUTION: This heat exchanger is featured by that a first separator 34 partitioning an inlet tank part and an outlet tank part 33 and a second separator 35 partitioning the inlet tank part into a first inlet tank part 31 and a second inlet tank part 32 are provided in an internal space of a first tank 15, and the first inlet pipe 17 allowing cooling water to flow inside the first inlet tank part 31, and in substantially the same direction as the first inlet pipe 17, the second inlet pipe 18 allowing the cooling water to flow inside the second inlet tank part 32 and the outlet pipe 19 allowing the cooling water from inside the outlet tank part 33 to escape are arranged facing outward in one end of a width direction of the first tank 15.

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 blown 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 system capable of independently controlling the temperature of an air conditioner and a left seat air conditioning zone.

[0002]

2. Description of the Related Art In recent years, 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 right seat and an air conditioning zone of a left seat in a vehicle compartment has been found. Have been. Inside the air-conditioning duct of such an air-conditioning unit, there is an air passage for the right seat for blowing out the conditioned air toward the occupant of the right seat in the passenger compartment and an air passage for blowing the conditioned air toward the occupant of the left seat in the passenger compartment. A partition plate for partitioning the air passage for the left seat is provided.

The evaporator, which is a cooling heat exchanger for cooling air, and the heater core, which is a heating heat exchanger for heating air, comprise air flowing through an air passage for the right seat and an air passage for the left seat. It is arranged so as to penetrate the above-mentioned partition plate so that heat exchange with flowing air is possible.

Here, the temperature of the air blown into the passenger compartment is controlled by using one or more flow control valves installed in a cooling water circuit of a hot water type heating apparatus, by using one or more flow control valves exposed in a right seat air passage. By controlling 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 air passage for the left seat independently of each other, 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. The box-shaped container-shaped capsule bent at a right angle is connected to the upper end portion of a first core portion including a plurality of first going tube groups and a plurality of first returning tube groups, a plurality of second going tube groups, and a plurality of second going tube groups. It is joined to the upper end of the second core portion composed of the return tube group.

Here, in the heater core of the right and left independent temperature control type, a plurality of partition plates are installed in the capsule, so that the inner space of the capsule communicates with the inlet side of the plurality of first going tube groups. It is divided into a second inlet tank section communicating with the tank section and the inlet sides of the plurality of second going tube groups, and an outlet tank section communicating with the outlet sides of the plurality of first and second return tube groups.

In the heater core, an increase in dead space which does not contribute to the heat exchange between the cooling water and the air, specifically, an increase in the dimension in the height direction of the capsule is suppressed. By configuring the pipes so as not to be exposed in the air passage and the air passage for the left seat, the first and second core portions are also provided with a point that the airtightness is easily maintained.
A first inlet pipe through which cooling water flows into the first inlet tank portion is taken out from one end face in the width direction of the capsule, and
A second inlet pipe through which the cooling water flows into the second inlet tank is taken out from the other end face (opposite end face) in the width direction of the capsule.

[0008]

However, in the heater core of the left and right independent temperature control type, since the directions of taking out the first inlet pipe and the second inlet pipe from the box-shaped container-shaped capsule are completely opposite directions, the cooling water There is a problem that the piping arrangement becomes complicated, the workability of the piping arrangement work is poor, and the assembling cost of the entire vehicle hot water heating apparatus is significantly increased.

Accordingly, an object of the present invention has been made in view of the above-mentioned problems, and while suppressing an increase in the dead space such as an increase in the size of the tank in the height direction as much as possible, it is also possible to reduce the first space from the substantially same direction. It is another object of the present invention to provide a heat exchanger that can easily manage a heat medium pipe by taking out a second inlet pipe and a second outlet pipe.

[0010]

In order to achieve the above object, the technical means described in claims 1 to 5 are adopted.

That is, according to the first aspect of the present invention, the first box-shaped container connected to the inlet end of the plurality of going tube groups and the outlet end of the plurality of returning tube groups of the heat exchanger body (10). In the tank (15) and the internal space of the first tank (15), an inlet tank portion communicating with the inlet end of the plurality of going tube groups and an outlet tank portion communicating with the outlet end of the plurality of returning tube groups. (33), a first partition plate (34), and a first inlet tank portion (31) communicating the inlet tank portion with the inlet ends of the plurality of outgoing tube groups of the first core portion (11). A second inlet tank (32) communicating with the inlet ends of the plurality of outgoing tube groups of the second core (12).
A second partition plate (35) is provided in the internal space, and one end of the first tank (15) in the width direction is provided with:
The first for allowing the heat medium to flow into the first inlet tank (31)
An inlet pipe (17), a second inlet pipe (18) for allowing a heat medium to flow into the second inlet tank portion (32) so as to be substantially in the same direction as the first inlet pipe (17), and an outlet tank An outlet pipe (19) through which the heat medium flows out of the portion (33) is provided facing outward.

According to the first aspect of the present invention, the first tank (1
5) In one direction from one end of the entrance / exit pipe (17, 1).
8, 19), the heating medium piping can be unified in one direction and can be easily performed, so that the workability of the heating medium piping can be improved and the assembly cost of the entire system can be reduced. Further, when the heater core is repaired, the heater core can be easily removed from the air conditioning unit, thereby improving serviceability.

The first inlet pipe (17) and the second inlet pipe (17)
By taking out the inlet pipe (18) in substantially the same direction, the first inlet pipe (1) is inserted into the air passage of the air conditioning unit.
7) or the second inlet pipe (18) is not exposed, so that when the heat exchanger is mounted in the air passage of the air conditioning unit, the first core part (11)
The arrangement of the seal member for partitioning the airtight and the second core portion (12) can be achieved with a simple structure, and the dead space in the air passage can be eliminated.

According to the second aspect of the present invention, the first inlet pipe (1
7) and the second inlet pipe (18) are connected to the heat exchanger body (1).
The first tank (15) is disposed at one end in the width direction so as to be overlapped in a direction orthogonal to the air flow of (0).

According to the second aspect of the present invention, the first and second inlet pipes (17, 18) are disposed so as to overlap in a direction substantially perpendicular to the air flow in substantially the same direction, thereby exchanging heat with air. An increase in the size (dead space) of the first tank (15) that is not performed can be suppressed as much as possible.

According to the third and fourth aspects of the present invention, the first tank (1
5) A first air vent passage (39) for communicating the inside of the first inlet tank portion (31) with the outlet tank portion (33).
And the inside of the second inlet tank (32) and the outlet tank (3
3) A second air vent passage (40) communicating with the inside is provided in the first partition plate (34).

According to the third and fourth aspects of the present invention, the heat medium in the first inlet tank portion (31) and the second inlet tank portion (32) has an extremely low heat flow velocity in the upper portion on the tank inner side. Bubbles contained in the medium are separated and the bubbles tend to accumulate. Therefore, the present invention provides a first air vent passage (39) that connects the inside of the first inlet tank section (31) and the outlet tank section (33), and the inside of the second inlet tank section (32) and the outlet tank section (33). ) And the second air vent passage (4).
0), the first and second air vent passages (39, 40) are made to have a negative pressure due to a pressure difference (ejector effect) with the flow velocity of the heat medium flowing in the outlet tank portion (33). Then, air bubbles generated in the first inlet tank portion (31) and the second inlet tank portion (32) are removed by the first and second inlet tank portions.
Flows into the outlet tank portion (33) through the air vent passages (39, 40), and is discharged from the outlet pipe (19) together with the heat medium. As a result, it becomes difficult for the air bubbles accumulated in the inlet tank to flow into the plurality of going tube groups constituting the heat exchanger body (10), so that the heat medium flows into the plurality of going tube groups from the inlet tank portion. The generation of noise during the operation can be suppressed.

Further, in the heat exchanger manufactured by temporarily assembling the component parts at normal temperature and then performing brazing in a furnace, the first and second air vent passages (39, 40) described above.
Is provided on the first partition plate (34), the first and second air vent passages (39, 40) are assembled in advance to the first partition plate (34), and the first partition plate (34) is It can be configured to be temporarily assembled to the first tank (15). Thus, an air vent passage having a simple structure can be formed.

According to the fifth aspect of the present invention, the heat exchanger installed in the air conditioning unit capable of controlling the temperature of the air conditioning zone of the right seat and the air conditioning zone of the left seat in the passenger compartment of the vehicle independently of each other. The air conditioning unit includes a first air passage that blows conditioned air to an air conditioning zone of a right seat, and a second air passage that is airtightly partitioned from the first air passage and blows conditioned air to an air conditioning zone of a left seat. The heat exchanger body (10) has a first core part (11) for exchanging heat between the air passing through the first air passage and the heat medium, and is hermetically partitioned from the first core part (11). , Second air passage (12)
Core part (1) for exchanging heat between air passing through
2).

According to the fifth aspect of the present invention, the air passing through the first air passage and the air passing through the second air passage of the air conditioning unit are separated by the first core portion (11) and the second core portion (12). By performing heat exchange independently of each other, the temperature of the conditioned air blown out from the first air passage into the air conditioning zone of the right seat and the second
Since the temperature of the conditioned air blown out from the air passage into the air conditioning zone of the left seat can be adjusted independently of each other, independent left and right temperature control can be achieved.

The reference numerals in the parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiment described later.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a case where the present invention is applied to a heating heater core (heating heat exchanger) of an air conditioner for a vehicle, and FIG. 1 shows a cooling water circuit of the air conditioner for a vehicle, which is a reheat type. An air conditioning unit (not shown) employing a temperature control is provided with a cooling water circuit 2 that uses cooling water that has cooled a water-cooled engine 1 as a heat source for heating. The air conditioning unit is configured such that a first air passage that blows out conditioned air toward the air conditioning zone of the right seat in the vehicle compartment and a second air passage that blows conditioned air toward the air conditioning zone of the left seat in the vehicle interior are formed by an intermediate partition plate or the like. Equipped with partitioned air conditioning duct.

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

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 thereby heat the vehicle interior. Configure the hot water circuit of the heating device.

As shown in FIGS. 2 and 3, 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 in a direction substantially horizontal to the vehicle. , The heat exchanger body 10 including the first core portion 11 and the second core portion 12 and the flow rate of the cooling water flowing in the first core portion 11 and the flow rate of the cooling water flowing in the second core portion 12 are independent of each other. First and second flow control valves 13 and 14 for adjusting
And a substantially rectangular cylindrical first tank 1 joined to a front side of the heat exchanger body 10 in a depth direction (a front-back direction with respect to the vehicle).
5, a substantially rectangular cylindrical second tank 16 joined to the rear side of the heat exchanger body 10 in the depth direction (the front-back direction with respect to the vehicle), and a first tank 15 for flowing cooling water into the first tank 15. ,
It comprises second inlet pipes 17, 18 and an outlet pipe 19 through which cooling water flows out of the first tank 15. The heating heat exchanger 5 is arranged so as to exchange heat with air flowing in the direction of arrow a shown in FIG. (On the upper side with respect to the vehicle) The first core portion 11 is disposed in the first air passage of the air conditioning duct, and the first core portion 11 is arranged in a plurality of rows in the width direction of the heating heat exchanger 5.
The air is heated by exchanging heat between the cooling water flowing in the first tube group and the air passing outside. Further, the second core portion 12 is disposed in the second air passage 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
Height direction of heating heat exchanger 5 (vertical direction with respect to vehicle)
Are arranged in two columns. The plurality of first tube groups include a plurality of first going tube groups through which cooling water flows from the front side to the rear side in the depth direction (the front-back direction with respect to the vehicle) of the first core portion 11, and A plurality of first return tubes that are arranged on the air upstream side of the first going tube group and through which the cooling water flows from the rear side in the depth direction (the front-back direction with respect to the vehicle) of the first core portion 11 toward the front side. Consists of groups.

The plurality of second tube groups include a plurality of second going tube groups through which cooling water flows from the front side to the rear side in the depth direction (the front-back direction with respect to the vehicle) of the second core portion 12. And a plurality of cooling water flowing from the rear side in the depth direction (the front-back direction with respect to the vehicle) of the second core portion 12 toward the front side is disposed on the upstream side of the second going tube group. It consists of two return tube groups.

Each of the tubes 6 forming the plurality of first and second going tube groups and the first and second returning tube groups is made of an aluminum alloy material (Clat 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 are installed in the middle of cooling water pipes (branch pipes) 21 and 22 connected to the first and second inlet pipes 17 and 18, respectively. These first and second flow rate control valves 13 and 14 are flow rate control means for controlling the flow rate of the cooling water flowing into the first and second core parts 11 and 12. Is controlled by controlling the amount of heating of the air passing therethrough so that the blowing temperatures can be changed independently of each other.

Next, the first tank 15 is
And a sheet metal 24 joined to the opening side of the capsule 23 by brazing and having a flat hole for inserting a front end in the depth direction (front-back direction with respect to the vehicle) of the two-row tandem tube 6. I have.

The capsule 23 is a bent capsule formed into a box-shaped bottomed container shape by bending and brazing a substantially cross-shaped plate material. The depth dimension (dimension in the front-rear direction with respect to the vehicle) of the capsule 23 is determined by the first and second inlet pipes 17 and 18 in which the pipe diameter of the joint portion joined to the capsule 23 is formed in a reduced pipe.
Are arranged side-by-side and are joined to each other, so that the length is about 34 mm with respect to about 17 mm of a normal heater core. The capsule 23 and the sheet metal 24 are made of an aluminum alloy material (cladding material) whose surface is covered with a brazing material.

Next, the above-mentioned first tank 15 is provided with a first separator 34 for partitioning the internal space of the capsule 23 into an inlet tank portion and an outlet tank portion 33 which will be described later. Also, the inner space of the inlet tank is
A substantially L-shaped second separator 35 is provided which is divided into an inlet tank 31 and a second inlet tank 32.

The first separator 34 and the second separator 35 which define the internal space of the capsule 23 are made of an aluminum alloy material (cladding material) whose surface is covered with a brazing material.
As shown in FIG. 4, the temporary fixing protrusions 34a,
35a and the fitting holes 34b and 34c are formed, and the temporarily fixed protrusion 34a of the first separator 34 is
3 and a sheet metal 24 provided at the bottom of
Is fitted in a fitting hole (not shown) provided in the horn. Further, the temporary fixing projection 35a of the second separator 35 is provided with the fitting hole 34b provided in the first separator 34 and the sheet metal 2.
4 is fitted in a fitting hole (not shown) provided in 4. These temporary fixing projections 34a, 35a and the fitting holes 23b, 34
b is a fitting for temporary fixing in the brazing step described later.

The first inlet tank section 31 is connected to the inlet-side ends of a 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 portion 31 and the second inlet tank portion 32 are installed adjacent to each other in the width direction of the heat exchanger body 10. And the outlet tank part 33 is connected to the outlet side end of the plurality of first and second return tube groups.

Next, by installing the heating heat exchanger 5 in a substantially horizontal direction, the first inlet tank section 31 and the second
In the upper part on the far side where the flow velocity of the cooling water in the inlet tank part 32 is extremely slow, bubbles contained in the cooling water are separated, and air reservoirs 31a and 32a are likely to be generated in the part shown in FIG. Therefore, in the present invention, the first air reservoir 31a of the first inlet tank 31 and the first air reservoir 31 communicating with the outlet tank 33 are connected to each other.
An air vent pipe 39 and a second air vent pipe 40 communicating the air reservoir 32 a of the second inlet tank 32 and the outlet tank 33 are provided.

The outlets of the first air vent pipe 39 and the second air vent pipe 40 discharged into the outlet tank 33 are directed in the flow direction of the cooling water flowing into the outlet tank 33, and Fitting hole 3 of separator 34
4c, is formed of a circular aluminum tube having an air vent passage, and has an outlet tank portion 33.
Pressure difference with the flow velocity of the cooling water flowing inside (ejector effect)
Thus, the inside of the first air vent pipe 39 and the second air vent pipe 40 is made to have a negative pressure to cause the first air vent pipe 39 and the second air vent pipe 40 to have a suction action. Thus, the air bubbles in the air reservoirs 31a and 32a are sucked into the outlet tank 33.

Next, the second tank 16 is connected to a bottomed box-shaped container 25 by brazing to the opening of the capsule 25, and is provided in the depth direction of the two-row tandem tube 6 (front and rear with respect to the vehicle). And the sheet metal 26 having a flat hole for inserting the rear end of the sheet metal 26 in the direction (1). The capsule 25 and the sheet metal 26 are made of an aluminum alloy material (cladding material) whose surface is covered with a brazing material.

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

Next, the first and second inlet pipes 17 and 18 and the outlet pipe 19 are taken out from one end face in the width direction of the capsule 23, that is, from the substantially same direction of the capsule 23 to the outside. Moreover, the first inlet pipe 17 and the second
The inlet pipe 18 is arranged side by side in the depth direction of the capsule 23 (the front-back direction with respect to the vehicle), and the outlet pipe 19 is arranged in the height direction of the capsule 23 of the first and second inlet pipes 17 and 18 (with respect to the vehicle). (Vertical direction).

The first and second inlet pipes 17, 18 and the outlet pipe 19 are made of an aluminum alloy material (cladding material) whose surface is covered with a brazing material, and are formed in a cylindrical shape. And the first and second inlet pipes 17, 18
The upstream end of the first tank 15 communicates with the outlet of the water jacket 3 of the engine 1 through the cooling water pipes 21, 22, 27, and the downstream end of the first tank 15 and the second inlet tank 3 of the first tank 15.
1, 32. The upstream end of the outlet pipe 19 communicates with the outlet tank 33 of the first tank 15, and the downstream end communicates with the suction port of the water pump 4 via the cooling water pipe 29.

The downstream end of the first inlet pipe 17 is
The cap 23 is fitted into a circular first inlet pipe insertion hole 41 formed on one end side wall in the width direction. The downstream end of the second inlet pipe 18 is
Is inserted into a circular second inlet pipe insertion hole 42 formed on one end side wall in the width direction of the second inlet pipe. The upstream end of the outlet pipe 19 is fitted into a circular outlet pipe insertion hole (not shown) formed on one side wall in the width direction of the capsule 23.

Note that the first inlet pipe insertion hole 41 is
The second inlet pipe insertion hole 42 communicates with the inlet tank portion 31.
Communicates with the second inlet tank 32, and an outlet pipe insertion hole (not shown) communicates with the outlet tank 33.

Next, the heating heat exchanger 5 having the above configuration
Will be described. First, the capsule 23 of the first tank 15 is formed by stamping out a press to form a flat plate material made of an aluminum alloy into a substantially cross shape, leaving a brazing margin, and bending four corners of the bottom wall in a substantially right angle direction. A box-shaped bottomed container is formed by superimposing the two side walls (both end surfaces in the width direction and the depth direction) and each brazing margin.

Subsequently, the first and second inlet pipes 17, 18
The first and second inlet pipe insertion holes 41 and 42 to which the outlet pipe 19 is connected and the outlet pipe insertion hole (not shown) are formed in one end surface of the box-shaped bottomed container in the width direction by pressing. Open by. At the same time, a one-character fitting hole 23b is formed in the bottom surface by press punching. In the same manner, the capsule 25 of the second tank 16 is
A box-shaped bottomed container is formed by punching, bending, and punching.

On the other hand, the first separator 34 and the first separator 35 having a predetermined shape are formed by subjecting a flat plate material made of an aluminum alloy to stamping and bending of a press. Here, the first air release pipe 39 and the second air release pipe 40 are connected to the first separator 34 at a predetermined mounting position by welding or the like in advance in the fitting hole 34c of the first separator 34.

On the other hand, one end of the plurality of tubes 6 is inserted into a plurality of flat holes formed in the sheet metal 24 of the first tank 15, and the other ends of the plurality of tubes 6 are similarly connected to the sheet metal of the second tank 16. 26 are inserted into a plurality of flat holes. Then, the first and the second configured by sandwiching the corrugated fins 7 between the adjacent tubes 6.
The side plates 8 and 9 are attached to both end portions of the core portions 11 and 12.

Next, the temporarily fixed projections 3 of the second separator 35
5a is fitted into the fitting hole 34b of the first separator 34, and the temporary fixing projection 35a of the first separator 34 is fitted into the fitting hole 23b of the
Third, the first and second separators 34 and 35 are temporarily fixed.

Next, the first and second separators 34 and 35 are assembled so as to be sandwiched between the capsule 23 and the sheet metal 24. Similarly, after assembling the separator 38 at a predetermined position of the capsule 25 of the second tank 16,
By assembling the separator 38 so as to be sandwiched between the capsule 25 and the sheet metal 26, the first and second
A first tank 15 is temporarily attached to one end of a heat exchanger body 10 composed of core portions 11 and 12, and the heat exchanger body 1
The second tank 16 is temporarily attached to the other end of the “0”.

Next, the downstream end of the first inlet pipe 17 is inserted into a first inlet pipe insertion hole 41 formed on one end surface in the width direction of the capsule 23, and the front end faces the inside of the first inlet tank 31. I do. Similarly, the downstream end of the second inlet pipe 18 is inserted into the second inlet pipe insertion hole 42 formed on one end surface in the width direction of the capsule 23, and the front end faces the inside of the second inlet tank 32. And the exit pipe 1
9 is inserted into an outlet pipe insertion hole (not shown) formed on one end surface of the capsule 23 in the width direction.
The tip is made to face inside the second inlet tank 32.

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.

Next, the heating heat exchanger 5 having the above configuration
The operation of the air conditioner to which the present invention is applied will be described.

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 first and second flow control valves 1 correspond to 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.
Since the opening degree (opening degree) of 3 and 14 is adjusted, cooling water flows at a flow rate corresponding to the set temperature of each air conditioning zone into 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 → a plurality of second going tube groups → the second intermediate tank 37 → a plurality of second return pipes. Tube group → flows into the outlet tank 33,
The coolant merges with the cooling water flowing into the outlet tank 33 from the first core portion 11.

The cooling water joined in the outlet tank 33 passes through the outlet pipe 19 and the cooling water pipe 29,
It goes into 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 air passages of the air conditioning duct. Heats air by exchanging heat with air. As a result, air having a blowing 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 downstream end of the first air passage, and the air conditioning zone of the right seat air conditioning zone. The inside is air-conditioned. On the other hand, air having a blowing temperature corresponding to the set temperature of the air conditioning zone of the left seat is blown out from the passenger seat side face outlet or the passenger seat foot outlet at the downstream end of the second air passage, and the air in the left seat air conditioning zone is discharged. Is air-conditioned.

Here, in the heating heat exchanger 5 such as a right and left independent temperature control type heater core, the first tank 1
5, two first and second inlet pipes 17 and 18 are arranged in a depth direction (a front-back direction with respect to the vehicle).
The size of the tank 15 in the depth direction (the front-back direction with respect to the vehicle) is about 34 mm larger than that of the normal (about 17 mm).

Therefore, when a box-shaped closed-bottomed capsule (bent capsule) 23 is used as the first tank 15 of the heat exchanger 5 for heating, the depth direction of the first tank 15 (with respect to the vehicle) When the cooling water flows from the first and second inlet pipes 17 and 18 into the first and second inlet tank portions 31 and 32,
In the upper part on the far side where the flow rate of the cooling water in the first and second inlet tank parts 31 and 32 is extremely low, bubbles contained in the cooling water are separated, and the air reservoir 31 shown in FIG.
Air bubbles easily accumulate in a and 32a.

For this reason, air bubbles existing in the vicinity of the air reservoirs 31a and 32a are provided with a first air vent pipe 39 and a second air vent pipe 40 which communicate the air reservoirs 31a and 32a and the outlet tank 33, respectively. By making the pressure inside the first air vent pipe 39 and the second air vent pipe 40 negative by the pressure difference (ejector effect) with the flow rate of the cooling water flowing in the outlet tank part 33, the first inlet tank part 31 and the second The bubbles generated in the second inlet tank 32 flow into the outlet tank 33 through the first air vent pipe 39 and the second air vent pipe 40, and are discharged from the outlet pipe 19 together with the cooling water. Thereby, the air bubbles in the air reservoirs 31a and 32a are removed from the outlet tank 3
Air bubbles are less likely to accumulate in the first and second inlet tank portions 31 and 32 after flowing out to the third side.

According to the heat exchanger according to the above embodiment,
The air passing through the first air passage and the air passing through the second air passage of the air conditioning unit are divided into a first core portion 11 and a second core portion 12.
By performing heat exchange independently of each other, the temperature of the conditioned air blown out from the first air passage into the air conditioning zone of the right seat and the temperature of the conditioned air blown out from the second air passage into the air conditioning zone of the left seat are Can be adjusted independently of each other, so that left and right independent temperature control can be realized.

Also, by taking out the inlet / outlet pipes 17, 18, and 19 from one end of the first tank 15 in substantially the same direction, the heating medium piping can be unified in one direction and can be easily performed. Operability can be improved, and the assembly cost of the entire system can be reduced. Further, when the heater core is repaired, the heater core can be easily removed from the air conditioning unit, thereby improving serviceability.

Further, by taking out the first inlet pipe 17 and the second inlet pipe 18 in substantially the same direction, either the first inlet pipe 17 or the second inlet pipe 18 is exposed in the air passage of the air conditioning unit. Accordingly, when the heat exchanger is mounted in the air passage of the air conditioning unit, the arrangement of the seal member for partitioning the first core portion 11 and the second core portion 12 in an airtight manner is simple. It is possible to cope with the problem and to eliminate the dead space in the air passage.

Further, by arranging the first and second inlet pipes 17 and 18 so as to overlap each other in a direction substantially perpendicular to the air flow, a depth direction of the first tank 15 which does not exchange heat with air (vehicle). In this case, an increase in the dimension (dead space) can be suppressed as much as possible.

Further, in the upper part on the tank inner side where the flow rate of the cooling water in the first inlet tank part 31 and the second inlet tank part 32 is extremely slow, the bubbles contained in the cooling water are separated and the bubbles are likely to accumulate. . Therefore, the present invention provides the first
A first air vent pipe 39 communicating the inside of the inlet tank part 31 with the outlet tank part 33 and a second air vent pipe 40 communicating the inside of the second inlet tank part 32 with the outlet tank part 33
By providing a pressure difference (ejector effect) with the flow rate of the cooling water flowing in the outlet tank portion 33, the pressure in the first air vent pipe 39 and the second air vent pipe 40 is set to a negative pressure, whereby the first inlet tank In part 31 and second
Bubbles generated in the inlet tank 32 flow into the outlet tank 33 via the first air vent pipe 39 and the second air vent pipe 40, and are discharged from the outlet pipe 19 together with the cooling water.

As a result, it becomes difficult for the air bubbles accumulated in the inlet tank to flow into the plurality of outgoing tubes constituting the heat exchanger body 10, so that the heat medium flows from the inlet tank into the plurality of outgoing tubes. Generation of noise at the time of inflow can be suppressed.

In a heat exchanger manufactured by temporarily assembling components at normal temperature and then performing brazing in a furnace, the first and second air vent pipes 39 and 40 described above are provided in the first separator 34. By the first and second
The air vent pipes 39 and 40 may be assembled to the first separator 34, and the first separator 34 may be temporarily assembled to the first tank 15. Thus, an air vent passage having a simple structure can be formed.

(Other Embodiments) In the above embodiment,
After the first and second air vent pipes 39 and 40 are previously connected to the first separator 34 at a predetermined mounting position by welding or the like in the fitting hole 34c of the first separator 34, the first separator 34 is brazed in a furnace. Although it has been described that they are joined, the present invention is not limited to this, and as shown in FIG.
And a support plate 43 having a fitting hole 43c formed on the other end side. A one-character fitting hole 34d is formed in the first separator 34, and the fitting hole 43c of the support plate 43 and the first
It is preferable that the third and fourth air vent pipes 39a and 40a are temporarily assembled in the fitting holes 34c of the separator 34 and then brazed in the furnace. Thereby, since the manufacture of the components of the heat exchanger for heating 5 can be unified to brazing in a furnace, the joining quality can be stabilized. The positions of the outlets in the outlet tank 33 of the third and fourth air vent pipes 39a and 40a are directed in the direction in which the cooling water flows toward the outlet pipe 19.

In the above embodiment, the heating heat exchanger 5 is mounted horizontally on the air-conditioning unit with the first tank 15 facing the front side of the vehicle in the front-rear direction. One tank 15 may be installed facing the rear side. At this time, the air reservoirs 31a, 32a
Are inside the first inlet tank 31 and the second inlet tank 3
2 is located above.

In the above embodiment, the heating heat exchanger 5 is installed horizontally in the air-conditioning unit.
Is turned upward. At this time, as shown in FIG.
Since the positions of the air reservoirs 31a and 32a are the top ends of the first tank 15, the air outlets are connected to the air reservoirs 31a and 31a.
The fifth and sixth air vent pipes 39b and 40b are preferably formed so that they can be sucked from the outlet tank 32a and communicate with the outlet tank 33. Thus, the difference in the position of the air reservoirs 31a and 32a depending on the installation direction of the heating heat exchanger 5 is changed only in the mounting direction of the fifth and sixth air vent pipes 39b and 40b that are coupled to the first separator 34. This has the effect of not increasing the number of parts.

The present invention is not limited to the heating heater core, but may be applied to a heating heat exchanger such as a radiator of a vehicle air conditioner, and may be applied to a cooling heat exchanger such as an evaporator of a vehicle air conditioner. May be applied. In addition, although the cooling water which cooled the engine 1 was used as a heat medium, you may use a refrigerant | coolant as a heat medium.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a cooling water circuit of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a plan view showing a main structure of a heating heat exchanger according to an embodiment of the present invention.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2 showing a configuration inside a first tank of the heating heat exchanger according to the embodiment of the present invention.

FIG. 4 is a perspective view showing a first separator, a second separator, a first air release pipe, and a main part of the first air release pipe.

FIG. 5 is a side view illustrating a configuration of a first separator according to another embodiment.

FIG. 6 is a plan view showing a configuration inside a first tank according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Heat exchanger main body 11 ... 1st core part 12 ... 2nd core part 15 ... 1st tank 17 ... 1st inlet pipe 18 ... 2nd inlet pipe 19 ... outlet pipe 31 ... 1st inlet tank part 32 ... 2nd Inlet tank part 33 Outlet tank part 34 First separator (first partition plate) 35 Second separator (second partition plate) 39 First air vent pipe (first air vent passage) 40 Second air vent pipe ( Second air vent passage)

Claims (5)

[Claims] 1. A plurality of outgoing tube groups through which a heat medium flows, and a plurality of outgoing tube groups disposed before and after these outgoing tube groups in an air flow direction, and in which a heat medium flows in a direction opposite to the plurality of outgoing tube groups. A first core portion (11) in which a group of return tubes are arranged in the width direction, and the first core portion (1
1) a plurality of going tube groups installed in parallel in the width direction and through which a heat medium flows, and a plurality of going tube groups arranged before and after these going tube groups in the air flow direction; A heat exchanger body (10) having a second core portion (12) in which a plurality of return tubes through which a heat medium flows in the opposite direction are arranged in the width direction; A box-shaped container-like first tank (15) connected to an inlet end of the plurality of going tube groups and an outlet end of the plurality of returning tube groups, and an internal space of the first tank (15) A first partition plate (34) partitioned into an inlet tank portion communicating with the inlet ends of the plurality of going tube groups and an outlet tank portion (33) communicating with the outlet ends of the plurality of returning tube groups. And the inlet tank portion is connected to the first core portion ( 1) a first inlet tank portion (31) communicating with an inlet end of the plurality of going tube groups; and a second inlet communicating with the inlet end of the plurality of going tube groups of the second core portion (12). A second partition plate (35) for partitioning the first tank (31) from the first tank (15);
A first inlet pipe (17) through which the heat medium flows into the inlet tank section (31), and the second inlet tank section (32) is set so as to be substantially in the same direction as the first inlet pipe (17). A heat exchanger characterized in that a second inlet pipe (18) through which the heat medium flows and an outlet pipe (19) through which the heat medium flows out of the outlet tank portion (33) are provided outward. . 2. The first inlet pipe (17) and the second inlet pipe (17).
The inlet pipe (18) is provided at one end in the width direction of the first tank (15) so as to overlap in a direction orthogonal to the air flow of the heat exchanger body (10). The heat exchanger according to claim 1. 3. The first tank (15) includes a first inlet tank (31) and an outlet tank (33).
A first air vent passage (39) that communicates with the inside of the second inlet tank (32) and the outlet tank (3).
3) The heat exchanger according to claim 1 or 2, further comprising a second air vent passage (40) that communicates with the inside. 4. The first and second air vent passages (39,
The heat exchanger according to claim 3, characterized in that (40) is provided on the first partition plate (34). 5. A heat exchanger installed in an air conditioning unit capable of 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, The unit has a first air passage that blows out conditioned air to the air conditioning zone of the right seat, and a second air passage that is airtightly partitioned from the first air passage and blows out conditioned air to the air conditioning zone of the left seat. The heat exchanger body (10) is configured to exchange heat between air and a heat medium passing through the first air passage.
1) and the second core portion (12) which is air-tightly partitioned from the first core portion (11) and exchanges heat between air passing through the second air passage (12) and a heat medium. The heat exchanger according to any one of claims 1 to 4, characterized in that: