JP3355512B2 - Heat exchange unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange unit for a vehicle air conditioner, for example, and more particularly to a structure in which a heat exchanger can be fixed to a heat exchange case at the same time by connecting a pipe to an inlet / outlet of the heat exchanger.

[0002]

2. Description of the Related Art As a structure for connecting a pipe to an inlet / outlet portion of a heater core, the structure shown in FIG. 1 of Japanese Utility Model Laid-Open No. 4-73781 is known. A structure for connecting the inflow / outflow pipes 23 and 24 to the entrance and exit of the heater core 20 described in this publication will be outlined below.

[0003] Flange-shaped tank mounts 25 and 26 are formed on the periphery of the opening of the entrance and exit, and four bolt holes 25B and 2 are formed in each of the tank mounts 25 and 26.
6B are provided. In addition, flange-like pipe mounts 27, 28 are formed in the periphery of one opening of the inflow-side pipe 23 and the outflow-side pipe 24, and four bolt holes 27B are also formed in each of the pipe mounts 27, 28. , 28B
Is provided.

Accordingly, the tank mount 25 and the pipe mount 27 and the tank mount 26 and the pipe mount 28 are joined so that the bolt holes 25B and 27B and 26B and 28B communicate with each other. By inserting a plurality of bolts into the bolt holes of the inlet and outlet and the inflow / outflow pipe 2
3 and 24 are connected.

[0005]

However, in the structure of the prior art described above, since the inflow pipe and the outflow pipe must be separately connected to the entrance and exit, the connection work of the inflow and outflow pipes is complicated. There was an inconvenience.

Further, in order to prevent rattling of the heat exchanger, it is necessary to fix the heat exchanger to the heat exchange case. For example, as shown in Japanese Utility Model Laid-Open Publication No. 52-36445, the heat exchanger 9 is not provided. The stay 27 is fixed to the dashboard 24. Further, as shown in Japanese Utility Model Laid-Open No. 61-122107, a fixing portion (hook 24) is provided on the rear end surface of the tank 15 of the heater core 10, and is fixed by engaging with a groove 25 formed in the rear wall 16. I have. Furthermore, 62-167713
In the publication, a locking piece 2 is provided in the opening 16 of the air duct 1, and the tank of the heater core 5 is locked and fixed by the locking piece 2.

As described above, in the conventional example, the joining of the port and the pipe and the fixing of the heat exchanger are performed separately.

Accordingly, an object of the present invention is to provide a heat exchange unit capable of fixing a heat exchanger to a heat exchange case at the same time as attaching a pipe to an entrance and exit of the heat exchanger in order to reduce the number of work steps.

[0009]

SUMMARY OF THE INVENTION A heat exchange unit according to the present invention is provided at a junction between an entrance and an exit of a heat exchanger housed in a heat exchange case and a pipe connected to the entrance and exit. A plate is arranged on the heat exchanger side of the flange formed at the entrance and exit, and a plate is arranged on the anti-heat exchanger side of the flange formed on the pipe, and a part of the heat exchange case is interposed between the two plates. The plate at the doorway and the plate at the pipe are fastened by a fixture to clamp a part of the heat exchange case.

[0010]

Therefore, the plate disposed on the heat exchanger side of the flange of the entrance and exit and the plate disposed on the side opposite to the heat exchanger of the flange of the pipe are tightened by the fixture, so that the entrance and exit are connected to the pipe. At the same time, the heat exchanger is partly held between the two plates, and the heat exchanger is fixed to the heat exchanger case.

[0011]

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

FIG. 1 shows a heater unit 1 (a part thereof) as an example of a heat exchange unit.
The heater unit 1 is connected to a blower unit and a cooling unit (not shown) to constitute an air conditioner used for a vehicle, for example. The heater unit 1 includes a box-shaped heater case 2 and a heater core 10 and an air mix door (not shown) disposed upstream of the heater core 10.

The heater case 2 is shown in FIGS.
As shown in (a), the following two pipes 15, 15
Are formed on the upper surface so that they can be inserted side by side. As shown in FIG. 1, a pinched portion 6 extends from the side of the heater case 2 in the peripheral portion of the opening 5.

The heater core 10 heats the air passing through the heater core 10 and sends it to the downstream side.
The portion facing the opening 5 of the heater case 2 has entrances 11, 11. This entrance 11
The through hole 12 is attached to the heater core body 10a by brazing or the like, and has a communication hole 12 through which a pipe 15 described below can be inserted. A flange 13 is provided along the periphery of the opening of the entrance 11 on the pipe insertion side. Since the configuration of the heater core 10 itself is known, the description thereof is omitted.

The pipe 15 is connected to the communication hole 12 of the entrance 11.
The flange 16 and the O-ring insertion portion 17 are formed by press working as particularly shown in FIG.

Therefore, when the pipe 15 is inserted into the entrance 11 of the heater core 10, the flange 13 of the entrance 11 and the flange 16 of the pipe 15, as shown in FIG.
And will come into contact. When the flange 13 and the flange 16 are joined, the thickness of the heater case 2
Is substantially equal to the thickness of the held portion 6.

As shown in FIG. 1, a plate 20 is externally inserted into the entrances 11 on the heater core 10 side of the flange 13 as shown in FIG. Such a plate 20
As shown in FIG. 4 (b), is a thin plate having a substantially elliptical shape, which can be extrapolated to the entrances and exits 11 and has communication holes 21 and 21 having a diameter smaller than that of the flange 13. I have. In addition, the plate 20 has a size that allows the plate 20 to come into contact with the held portion 6 of the heater case 2. Further, between the communication holes 21 and 21, a locking hole 22 into which a fixing tool 35 described later is inserted is provided.

Further, as shown in FIG. 1, a plate 30 is externally inserted in the pipes 15, 15 on the side of the flange 16 opposite to the heater core. Such a plate 30 is shown in FIG.
A substantially oval thin plate as particularly shown in (c),
Notch grooves 31, 31 each having a U-shaped notch having a width substantially equal to the diameter of the pipe 15 are formed. Thereby, the pipe 1
The plate 30 can be externally fitted to 5, 5 from the side. Further, the plate 30 has a size such that a part thereof can abut on the held portion 6 of the heater case 2.
A locking hole 32 into which a fixing tool 35 described below is inserted is provided between the notches 31. In addition, instead of the notch grooves 31, 31, the plate 2
It is a matter of course that a hole into which the pipes 15 and 15 can be inserted may be provided as in the case of 0.

The fixing tool 35 uses, for example, bolts, screws, etc., and includes a head 35a and an insertion portion 35b. Of these, the head 35a is of course the locking hole 2
It is larger than 2,32. In addition, the insertion portion 35b connects the plate 20 and the plate 30 with the flange 1.
Even when the engagement is made with the interposition of the locking holes 2 and 3,
2. It has a length that allows it to be inserted into the locking hole 32. still,
The locking hole 22 is a screw hole.

Based on the above configuration, the entrances 11, 11
The connection between the heater core 10 and the pipes 15 and the fixing of the heater core 10 to the heater case 2 will be described with reference to FIGS.

The plate 20 is extrapolated to the entrances 11 of the heater core 10 in advance. That is,
Before assembling the doorway section 11 to the heater core 10,
After the plate 20 is extrapolated to the entrances and exits 11 and 11 until the plate 20 comes into contact with the flange 13 from the side of attachment to the heater core 10, the entrances and exits 11 and 11 are assembled to the heater core 10 by brazing or the like.

Next, the pipes 15, 15 with the O-ring 18 externally inserted into the O-ring insertion portion 17, are inserted into the entrances 11, 11, respectively.
The flanges 16 and 16 are inserted into the communication holes 12 and 12 until the flanges 13 and 13 come into contact with each other.

Further, the plate 30 is externally fitted to the pipes 15, 15 from the radial direction such that the cutout grooves 31, 31 are fitted to the side faces of the pipes 15, 15 from the radial direction of the pipes 15, 15. Thereby, between the plates 20 and 30,
Flange 13 of doorway 11 and flange 1 of pipe 15
6 and the held portion 6 of the heater case 2 are interposed.

Finally, a fixture (bolt) 35 is inserted into the engagement hole 22 of the plate 20 and the engagement hole 32 of the plate 30. Thereby, the flange 13 of the entrance / exit portion 11 and the flange 16 of the pipe 15 are tightened.
1 and the pipe 15 are pressed and connected. At the same time, the held portion 6 of the heater case 2 is
0 and 30 so that the heater core 1
0 is fixed to the heater case 2.

The plates 20 and 30 are connected to the entrance 1
1, a separate member from the pipe 15 has been described so far, but the present invention is not necessarily limited to this. For example, the plate 20 may be formed integrally with the entrance 11 by deep drawing.

Although the engagement between the plate 20 and the plate 30 has been described above as being engaged with one fixture 35, the present invention is not necessarily limited to this. Is also good.

[0027]

As described above, according to the heat exchange unit according to the present invention, the plate provided on the heat exchanger side of the flange at the entrance and the entrance and the plate provided on the counter heat exchanger side of the pipe flange. By engaging and tightening with a fixture, the inlet / outlet portion and the pipe can be connected and the heat exchanger can be fixed to the heat exchange case, so that the assembling work can be simplified.

Further, if the plate provided on the heat exchanger side of the flange of the entrance and the entrance and the plate provided on the opposite side of the pipe flange on the heat exchanger side can be engaged with one fixture, each of them can be engaged. The doorway and the pipe can be connected at a time, which also simplifies the assembly work.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a heater unit.

FIG. 2 is a process diagram showing a procedure for connecting an inlet / outlet portion of a heater core to a pipe and fixing the heater core to a heater case.

FIG. 3 is a perspective view showing a state in which an inlet / outlet portion of a heater core is connected to a pipe and the heater core is fixed to a heater case.

4 (a) is a plan view showing an opening of a heater case, FIG. 4 (b) is a plan view showing a plate externally inserted in an entrance and exit, and FIG. 4 (c) is an external view of a pipe. FIG. 4 is a plan view showing a plate to be used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heater unit (heat exchange unit) 2 Heater case (heat exchange case) 5 Opening 6 Holding part 10 Heater core (heat exchanger) 11 Doorway 13 Flange 15 Pipe 16 Flange 20 Plate 21 Communication hole 22 Locking hole 30 Plate 31 communication hole 32 locking hole 35 fixture

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60H 1/08 F28F 9/02 301 F28F 9/00 321

Claims (1)

(57) [Claims] At the junction of an inlet / outlet portion of a heat exchanger housed in a heat exchange case and a pipe connected to the inlet / outlet portion, a plate is arranged on a side of the heat exchanger side of a flange formed at the inlet / outlet portion. At the same time, a plate is arranged on the side opposite to the heat exchanger of the flange formed on the pipe, a part of the heat exchange case is interposed between the two plates, and the plate at the entrance and the plate of the pipe are fixed with a fixture. A heat exchange unit, wherein a part of the heat exchange case is clamped and clamped.