JPS5942250Y2 - Heater unit in automotive air conditioner - Google Patents

Description

[Detailed description of the invention] This invention is an air conditioner for automobiles. Regarding improvements to hot water piping.

An example of an automobile air conditioner is shown in FIG. 1, and the automobile air conditioner includes an intake unit 1, a cooler unit 2, and a heater unit 3.

The intake unit 1 has a built-in fan 5 driven by a motor 4, and is further provided with an inside air inlet 6 through which a circulation flow into the vehicle interior flows and an outside air intake I through which outside air flows.

An intake door 9 is installed within the intake unit in order to switch and control the air flowing into the intake unit 1 through the inside air inlet 6 and the air flowing through the outside air intake I.

This intake door 9 is in the A position where the inside air inlet 6 is closed;
Position C, which closes the outside air intake T, and B, which is in between these positions.
Move to position.

The cooler unit 2 into which the air from the intake unit 1 flows has a built-in evaporator 12 through which refrigerant circulates through a refrigerant conduit 11rc, and after the air introduced from the intake unit 1 is cooled in the cooler unit 2, it is sent to the heater. Flows into unit 3.

A heater core 16 through which engine cooling water is circulated through a conduit 15Vc is assembled in the heater unit 3 to heat the air that has passed through the cooler unit 2.

Front surface K11j of heater core 16: Mix door 17 is attached, and by setting mix door 17 to any position between position F and position D (for example, position E),
All of the air that has passed through the cooler unit 2 is sent into the vehicle interior from the rear of the heater unit 3 while avoiding the heater core 16, all of the air that has passed through the heater core 16 is sent into the vehicle interior, or some of the air from the cooler unit 2 is sent to the vehicle interior through the heater core 16. 16, other air avoids the heater core, and is mixed with the mix passage to make air at an appropriate temperature.

Heater unit 3rctj: a defrost duct 19 for blowing out air from inside this heater unit 3 along the inner surface of the windshield, and a floor duct 20 for blowing air out toward the feet of the passenger in the vehicle interior 9.
and an instrument duct 21 for blowing air into the single room 9 from the vent outlet 10 of the instrument panel.

Furthermore, a room door 22 and an instrument duct 2 are provided for controlling air distribution between the defrost duct 19 and the floor duct 20.
Vent door 23 for controlling the distribution of air flowing to 1
is attached to the heater unit 3.

As shown in FIG.
4.25, a pipe 26 connecting these, and a fin 27 fixed to the pipe 26.One tank 24 is equipped with a supply pipe 15a through which engine cooling water is sent, and the other tank 25 is attached with an outflow conduit 15b.

Therefore, the engine cooling water that has flowed into the tank 24 from the supply conduit 15a passes through the pipe 26, reaches the tank 25, and flows out from the outflow conduit 15b.
6 and the inflowing air.

The structure of the case body B of the conventional heater core 16 and heater unit 3 is shown in FIGS. 3 and 4. As shown in FIGS.
．． It is soldered to a burring part 28 having a 25Vc shape, and when the heater core 16 is assembled to the case body BK, the conduits 15a and 15b protrude from the notch 29 formed in the case body BE, and the conduit 15a.

A rubber hose 30 is fastened to 15b using a clamp fitting 31.

The engine cooling water supplied to this heater core 16 is approximately 8
The temperature is 0°C, and the supply conduit 15a and the outflow conduit 1
Both 5b and 5b become quite high temperature.

In particular, since the heater core 16 is installed near the foot of the front seat, it was covered with VC insulation material to prevent the passenger's feet from touching it.

However, even if this is done, the insulation material may tear due to aging and the pipes may be directly exposed, or cracks may develop at the soldered joints between the pipes 15a and 15b and the tanks 24 and 25. or even conduits 15a, 15
If b and the rubber hose 30 were to come off, there was a risk that hot water would be exposed inside the vehicle even if the conduit etc. were covered with a heat insulating material.

Further, since the clamp joints between the conduits 15a, 15b and the rubber hose 30 are located at the feet of the front seat occupant, the joints may be thrown off due to the occupant's carelessness.

The purpose of this invention is to protect the outflow pipe and inlet pipe attached to the heater core, and at the same time to prevent any inconvenience to passengers even if high-temperature water leaks from the heater core. In an automobile air conditioner having a heater unit to which a door, a vent door, and a room door are attached, guide grooves for accommodating the heater core supply conduit and outflow conduit are formed from the side of the case body in the case body that constitutes the heater unit. Back 1
By bulging the case body itself outward,
The present invention is characterized in that the supply conduit and the outflow conduit are installed within the guide groove with a gap between them and the inner peripheral surface of the guide groove.

Next, regarding an embodiment of the present invention shown in FIGS. 5 to 10,
Components that are the same as those in FIGS. 1 to 3 will be described with the same reference numerals.

FIG. 5 is a perspective view showing the appearance of the heater unit 3,
FIG. 6 is a side view.

Inside the case body B, as mentioned above, there is a mix door 1.
7. A room door 22 and a vent door 23 are installed,
Furthermore, openings for a differential duct 19 and a floor duct 20 are provided.

The connection structure between the tank 24.25 and the conduits 15a, 15b is shown in FIGS. 1 and 8. A metal fitting 35 is welded to the tank 24.25, while the conduit 15a is connected to the tank 24.25.

A flange portion 36 is welded to 15b, and an O-ring 37 is sandwiched between the receiving metal fitting 35 and the flange portion 36.
The receiving fitting 35 and the flange portion 36 are fastened together.

The case body B of the heater unit 3 is an injection molded body of synthetic resin, and as shown in FIGS. 9 and 10, the case body B includes a housing portion for the heater core 16 and a suction conduit 15a1 connected to the heater core 16. Outflow conduit 15
In the accommodating portion b, a step portion 32 for accommodating the heater core 16 and a guide groove 33 for accommodating both the conduits 15a and 15b, which are formed by expanding the case body itself outward, are integrally molded. There is.

This guide groove 33 is formed from one side to the back of the case body B so that both the conduits 15a and isb are not exposed in the vehicle interior.
It is formed over a wide area.

The gap 34 formed between these conduits 15a, 15b and the inner peripheral surface of the guide groove 33 may be filled with a heat insulating material or the like.

A core packing 39 is installed between the heater core 16 and the case body B to provide heat insulation and prevent rattling between them.

Since the guide groove 33 for accommodating the conduits 15a and 15b is formed in the case body B itself up to the back of the heater unit 3, there is no need to attach a cover for heat insulation to these conduits 15a and 15b, and even if the conduits are welded. Even if there is a crack in any part, the hot water is first guided into the case, so there is no chance of hot water leaking into the passenger compartment.

Further, when the heater core 16 is assembled into the case body B, the conduits 15a and 15b themselves can also be covered at the same time.

Incidentally, a hot water cock may be provided inside the case body B.

As described above, according to the present invention, a guide groove for accommodating the supply conduit and the outflow conduit of the heater core is formed in the case body constituting the heater unit, and these conduits are inserted into the guide groove. Since it is installed with a gap between it and the inner peripheral surface of the guide groove, the high-temperature conduit will not be exposed to the bottom of the vehicle interior, and even if a crack occurs in the welded part of the conduit, high-temperature water will not leak out. It is guided inside the case body and does not leak directly into the passenger compartment.

Further, since the conduit is covered by the case body, the conduit is protected by the case body.

Since the connection between the conduit and the rubber hose is made at the back of the case body of the unit, there is no longer any inconvenience such as the rubber hose coming off due to the carelessness of the occupant.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view showing an example of an automotive air conditioner, Fig. 2 is a perspective view showing an example of a heater core, Fig. 3 is a perspective view showing a conventional heater unit case body, and Fig. 4 is a conventional tank. FIG. 5 is a cross-sectional view showing the connection structure between the pipe and the conduit, FIG. 5 is a perspective view showing the case body of the heater unit of the present invention, and FIG.
The figures are a side view of Fig. 5, Fig. 7 is an exploded perspective view showing the connection structure between the tank and the conduit according to the present invention, Fig. 8 is a sectional view of Fig. 7 in the assembled state, and Fig. 9 is the 6th Figure IX -IX
FIG. 10 is a sectional view taken along line X--X in FIG. 9 K>. 1... Intake unit, 2... Cooler unit, 3... Heater unit, 15a
...Inlet conduit, 15b...Outflow conduit, 33...Guide groove, 34...Gap.

Claims (1)

[Scope of utility model registration request] In an automotive air conditioner having a heater unit to which a heater core, mix door, vent door, and room door are attached, a heater core suction device is installed in the case body that constitutes the heater unit, extending from the side to the back of the case body. A guide groove for accommodating the conduit and the outflow conduit is formed from the side surface to the back side of the case body by bulging the case body itself outward, and the guide groove 1IIVc for accommodating the inhalation conduit and the outflow conduit is connected to these and the above. 1. Hot water piping for a heater unit in an automotive air conditioner, characterized in that it is installed with a gap between it and the inner peripheral surface of a guide groove.