JPH1067221A - Air-conditioning device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a maximum uniform diffusing temperature distribution for a heater core of a unidirectional type. SOLUTION: A pair of side plates 7 and 8 are provided on a flat tube 5 and a corrugated fin 6 at their both ends in the lamination direction. An entrance tank 3 is provided at a heat exchanging part 2 on the upstream side of the warm water flow direction of the flat tube 5. An exit tank 4 is provided at a heat exchanging part 2 on the downstream side of the warm water flow direction of the flat tube 5. And, a corrugated fin 6a is between the side plate 7 and the flat tube 5. Packings 13c and 13d are provided on the corrugated fin 6a covering it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly to a heater core which is a heat exchanger for heating the air conditioner for a vehicle.

[0002]

2. Description of the Related Art Conventionally, as a heater core of an air conditioner for a vehicle, a plurality of flat tubes through which hot water flows and corrugated fins for improving heat exchange efficiency are laminated to form a plate-shaped core portion. A one-way type in which hot water flows linearly in the same direction is known. Further, at both ends of the flat tube and the corrugated fin in the laminating direction, a pair of side plates for reinforcing and holding the flat tube and the corrugated fin are provided.

The core portions at both ends are configured such that the corrugated fin is sandwiched between the side plate and the flat tube, such as a side plate, a corrugated fin, and a flat tube. An inlet tank for distributing hot water to a plurality of tubes is provided on the hot water inlet side of the core portion, and an outlet tank for merging hot water after heat exchange flowing out of the plurality of tubes is provided on the hot water outlet side of the core portion. ing. Further, the inlet tank and the outlet tank in the laminating direction are provided with an inlet pipe for supplying hot water into the inlet tank and an outlet pipe for discharging hot water from the outlet tank.

[0004]

As a result of studying the above-mentioned heater core by the present inventors, the following has been found out. That is, in the above-described heater core, when hot water was supplied to the inlet tank, it was found that the flow rate of the hot water flowing through the flat tube located on the inlet pipe side was smaller than the flow rate of the hot water flowing through the flat tube located behind the inlet tank. As a result, the temperature of the air passing through the heater core becomes
There is a problem that the temperature is lower on the inlet pipe side with respect to the stacking direction of the core portion, and the blowout temperature distribution of the heater core becomes non-uniform. You.

Further, as a result of further studies by the inventors,
Of the air passing through the corrugated fins on the most inlet pipe side of the heater core, compared to the corrugated fins located between the flat tubes, as described above, since it is sandwiched between the side plate and the flat tubes, one flat tube Therefore, there is a problem that the temperature is extremely lowered and the temperature distribution of the blowout of the heater core becomes non-uniform.

Accordingly, an object of the present invention is to make the blowout temperature distribution of the one-way type heater core as uniform as possible.

[0007]

According to the present invention, in order to achieve the above object, according to the first and second aspects of the present invention, of the fins (6, 6a), the inlet pipe (6, 6a) is most disposed in the stacking direction. A side plate member (7) provided on the outer fin (6a) located on the outermost side of the heat exchange section (2) on the 9) side, for reinforcing and holding the heat exchange section (2);
At least one of the air upstream side and the air downstream side of the outer fin (6a) has the outer fin (6a) when the heating heat exchanger (1) is housed in the air conditioning unit (11).
a) a blocking member (1) for blocking the heat exchange flow path constituted by (a);
3c, 13d) are provided.

[0008] This prevents air from flowing through the blocking member around the outer fin located between the tube and the side plate member on the inlet pipe side in the stacking direction. The blowing temperature of the passed air can be made closer to be uniform. In particular, in the invention according to claim 2, the heating heat exchanger inserts a portion opposite to the inlet pipe (9) side in the stacking direction into the insertion opening (12) formed in the air conditioning unit (11). The heating heat exchanger (1) is configured to be housed and arranged in the air conditioning unit (11) through the insertion port (12). , A sealing member (13c, 13d) for sealing between the insertion port (12) and the heat exchanger (1) for heating, and the blocking member (13c, 13d) is provided with a sealing member (13c, 13d).
It is characterized by comprising.

Thus, it is possible to prevent the air in the air-conditioning case from leaking out from between the heating heat exchanger and the insertion port by the seal member, and since the blocking member is constituted by the seal member, There is no need to provide a special blocking member.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration diagram of a heating heat exchanger (heater core 1) of a vehicle air conditioner. FIG. 2 is a top view as viewed from above in FIG. FIG. 3 shows a perspective view of the heater core 1. FIG. 4 shows a state in which the heater core 1 is housed and arranged in the air conditioning unit case 11.

The heater core 1 is provided with engine cooling water (hereinafter, referred to as engine cooling water).
Heat exchange section 2 (also referred to as a core section), which heats air passing therethrough using hot water as a heat source, and heat exchanges the air passing therethrough with hot water, and is provided at both ends of the heat exchange section 2. And an outlet tank 4. The heat exchanging part 2 is made of aluminum metal, and a flat tube 5 in which warm water flows and a corrugated fin 6 made of aluminum for increasing heat exchange efficiency are laminated vertically in FIG. It is configured to be.

Further, the heat exchanging section 2 is made of iron at both ends of the flat tube 5 and the corrugated fin 6 in the laminating direction (vertical direction in FIG. 1) for reinforcing and holding the flat tube 5 and the corrugated fin 6. A pair of side plates 7 and 8 are provided. In addition, as shown in FIG. 1, the side plates 7 and 8 are stacked on the corrugated fin 6 located at the outermost position in the stacking direction of the heat exchange unit 2.

The side plate 7 is formed in a rectangular shape as shown in FIG. 3, and both ends of the side plate 7 in a direction orthogonal to the longitudinal direction (the direction of air flow passing through the heater core 1) are bent to form a bent portion 7a. Is formed. Thus, the side plate 7 is formed in a U-shaped cross section. The side plate 8 is also formed in a U-shape in cross section similarly to the side plate 7. Further, the reason why the side plates 7 and 8 have a U-shaped cross section is to improve the strength of the side plates 7 and 8, that is, the strength of the heater core 1.

The inlet tank 3 is formed of aluminum in the shape of a capsule having a square cross section. The inlet tank 3 is provided on the upstream side (one end) of the flat tube 5 of the heat exchange section 2 in the hot water flow direction (from left to right in FIG. 1). Further, the inlet tank 3 is provided along the laminating direction of the heat exchange unit 2 as shown in FIG. That is, the inlet tank 3
As shown in FIG. 1, is connected to one end side (warm water inlet) of the plurality of flat tubes 3 in the longitudinal direction.

An inlet pipe 9 for supplying hot water into the inlet tank 3 is provided at one end of the heat exchange section 2 of the inlet tank 3 in the stacking direction (upper side in FIG. 1). Similarly to the inlet tank 3, the outlet tank 4 is formed of aluminum in a capsule shape having a square cross section. The outlet tank 4 is provided downstream (the other end) of the flat tube 5 of the heat exchanger 2 in the hot water flow direction (from left to right in FIG. 1). Further, the outlet tank 4 is provided along the stacking direction of the heat exchange unit 2 as shown in FIG. That is, as shown in FIG.
Is communicated with the other end (warm water outlet) in the longitudinal direction. One end of the heat exchange section 2 of the outlet tank 4 in the stacking direction (upper side in FIG. 1) is provided with the outlet tank 4.
An outlet pipe 10 for supplying hot water therein is provided.

As shown in FIG. 1, the flow of the hot water in the heater core 1 is such that the hot water supplied from the inlet pipe 9 into the inlet tank 3 is distributed by the inlet tank 3 to all the flat tubes 5 and thereafter. The hot water that has flowed straight through the plurality of flat tubes 5 in the same direction merges in the outlet tank 4 and returns from the outlet pipe 10 to the engine side.

Such a heater core 1 is housed and arranged in an air-conditioning unit case 11 forming a flow path in a vehicle compartment as shown in FIG. The air conditioning unit case 11 is formed of a resin material such as polypropylene. Usually, the air conditioning unit case 11 includes a plurality of case units (not shown).
Is assembled into a duct shape. As shown in FIG. 4, the air conditioning unit case 11
Is formed in the air conditioning unit 11. The method of storing the heater core 1 in the air-conditioning unit case is as follows: a portion (lower portion) opposite to the inlet pipe 9 side in the stacking direction of the heat exchange portions 2 of the heater core 1.
Is inserted into the air-conditioning unit 11 through the insertion port 12, and the heater core 11 is held in the air-conditioning unit case 11. The heater core 11 may be held by forming a holding portion or the like for holding the heater core 11 in the air conditioning unit case 11.

By the way, the heater core 1 is inserted from an insertion port 12 formed in the air conditioning unit case 11, and as shown in FIG.
The heater core 1 is disposed so as to face the inlet pipe 9 side. Since there is a slight gap between the heater core 1 and the insertion port 12, there is a problem that the air in the air conditioning unit case 11 leaks from this gap as it is.

Therefore, in this embodiment, as shown in FIG. 4, a seal 13 made of, for example, urethane foam is interposed between the heater core 1 and the insertion hole 12 so as to seal. In FIG. 4, the packing 13 and the insertion port 12 are shown for easy understanding.
It is shown with an open space. And the packing 13
As shown in FIGS. 3 and 4, the inlet pipe 9 of the heater core 1
At the end on the side, the entire circumference of the heater core 1 is adhered with an adhesive. The packing 13 in the present embodiment includes:
It is composed of four packings 13a to 13d, and the packings 13a and 13b are attached along the outer peripheries of the inlet tank 9 and the outlet tank 10 as shown in FIG.

The packing 13c is attached to the surface of the heater core 1 on the upstream side of the air at the bent portion 7a of the side plate 7. Packing 13d is packing c
And is attached to the surface of the heater core 1 on the downstream side of the air at the bent portion 7 a of the side plate 7. The packing 13c and the packing 13
d is the same shape, so that the molding cost is lower than forming packings of different shapes.
This is for facilitating the sticking operation of the 13d.

Here, it should be noted that the packings 13c and 13d are attached to the bent portion 7a of the side plate 7 as shown in FIG. It is stuck so as to cover the corrugated fin 6a located. In other words, the periphery of the corrugated fin 6a is a heat exchange flow path that exchanges heat with the air that originally passes, but the packing 13
The heat exchange passage is completely closed by c and 13d.

That is, since the corrugated fins 6a are located between the side plate 7 and the flat tubes 5, heat is less transmitted than the corrugated fins 6 arranged between the flat tubes 5, and the air passing around the corrugated fins 6a is hardly transferred. Is extremely lower in temperature than air passing through the other corrugated fins 6. As a result, the temperature distribution of the blown air that has passed through the heater core 1 becomes uneven.

Further, as described above, the hot water supplied into the inlet tank 3 flows through the flat tube 5 located on the inlet pipe 9 side, and the hot water flows through the flat tube 5 located at the back of the inlet tank 3. Since the flow rate is smaller than the flow rate, the temperature of the air blown out of the heater core 1 is lower on the inlet pipe 9 side than on the inner side of the inlet tank 3.

Therefore, the temperature of the air passing around the corrugated fins 6a becomes lower than the temperature of the air passing through the other corrugated fins 6. As a result, the temperature distribution of the blown air that has passed through the heater core 1 becomes more uneven.
Therefore, in the present invention, since the packings 13c and 13d are pasted around the corrugated fin 6a as described above, air does not flow around the corrugated fin 6a. Thereby, it is possible to prevent the air in the air conditioning unit case 11 from leaking out from between the heater core 1 and the insertion port 12 and to prevent the air from flowing through the heater core 1.
Temperature distribution of the air that has passed through can be made uniform.

Further, in the present embodiment, the space between the heater core 1 and the insertion opening 12 is sealed by using the packing 13, but for this sealing, the sealing may be performed only on the bent portion 7a of the side plate 7. However, the width of the bent portion 7a (the width of the heat exchange portion 2 in the stacking direction) in the present embodiment is
When the packing 13 is formed in accordance with this width, the width of the packing 13 is so small that it becomes difficult to attach the packings 13c and 13d.

However, in the present embodiment, the widths of the packings 13c and 13d are increased because they cover the corrugated fins 6a in addition to the bent portions 7a.
The blowout temperature distribution of the heater core 1 can be made nearly uniform, and the work of attaching the packings 13c and 13d can be improved. The embodiments of the present invention have been described above, but the present invention can be applied to the following modifications.

In the above embodiment, the packing 13 covers the corrugated fin 6a. However, for example, a member that covers the corrugated fin 6a integrally may be formed in the air conditioning unit case 11. This member may be formed on either the upstream side or the downstream side of the corrugated fin 6a.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a heater core 1 according to an embodiment of the present invention.

FIG. 2 is a top view of the heater core 1 in the embodiment.

FIG. 3 is a perspective view of a heater core 1 in the embodiment.

FIG. 4 is a diagram illustrating a state in which the heater core 1 in the embodiment is housed and arranged in an air conditioning unit case 11.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heater core, 2 ... Heat exchange part, 3 ... Inlet tank, 4 ...
Outlet tank, 5: Flat tube, 6, 6a: Flat tube, 7, 8: Side plate, 11: Air conditioning unit case, 13: Seal member

Claims (2)

[Claims] A heating heat exchanger (1) is housed and arranged in an air conditioning unit (11), and air in the air conditioning unit (11) is heated by the heating heat exchanger (1). The heating heat exchanger (1) includes a plurality of tubes (5) through which hot water flows, and the air and the hot water when air passes therethrough. Fins (6,
6a) is provided on the heat exchange unit (2) on the upstream side of the tube (5) in the direction of hot water flow, and the hot water is supplied to the tube (5). And an outlet tank provided in the heat exchange section (2) downstream of the tube (5) in the direction of hot water flow, where the hot water flowing through the tube (5) merges. (4) an inlet pipe provided at one end side of the inlet tank (3) in the stacking direction of the tube (5) and the fins (6, 6a), and for supplying hot water into the inlet tank (3); (9) Out of the fins (6, 6a), on the outermost fin (6a) located at the outermost side of the heat exchange part (2) on the side of the inlet pipe (9) in the laminating direction. The heat exchange part (2) Side plate member to hold (7)
When the heat exchanger for heating (1) is housed and arranged in the air conditioning unit (11) on at least one of the air upstream side and the air downstream side of the outermost row fins (6a). To
An air conditioner for a vehicle, comprising a blocking member (13c, 13d) for blocking a heat exchange flow path formed by the outer fin (6a). 2. An insertion opening (1) formed in the air-conditioning unit (11) from a portion opposite to the inlet pipe (9) side in the laminating direction, the heating heat exchanger (1).
2) to be inserted into the air conditioning unit (11)
The heating heat exchanger (1) is configured so as to be housed in the air conditioning unit (11) from the insertion opening (12). Seal members (13c, 13d) are provided for sealing between (12) and the heat exchanger for heating (1), and the blocking members (13c, 13d) are provided by the seal members (13c, 13d). The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is configured.