JPH0454002Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an air conditioner for an automobile, and particularly to the structure of a heater unit that constitutes a main part of the device.

(Prior Art) Generally, an air conditioner installed in a car uses a heater unit to adjust the temperature of the air supplied from a blower unit, and then sends the air from air outlets arranged in various parts of the car according to the selected air blowing mode. The heater unit is configured to blow air into the interior of the vehicle, and the heater unit has a configuration as shown in, for example, Japanese Utility Model Application Publication No. 60-49008.

That is, this type of heater unit is provided with a cold air passage and a hot air passage, and the air supplied from the blower unit is distributed and introduced into both passages according to the position of the distribution door (air mix shutter). At the same time, the air introduced into the hot air passage is heated by a heater core installed in the passage, and after that, the air that has passed through both passages is combined and then sent from each air outlet through a duct to each part of the car. The air is configured to be delivered to an air outlet. In that case, the air outlets include a heater outlet, a defroster outlet, a vent outlet, etc., and doors are provided to open and close these outlets, respectively. The air blowing mode is set by selectively opening and closing these doors through operations by the occupant, and the blowing temperature is adjusted by the position of the distribution door.

(Problem to be Solved by the Invention) By the way, this type of heater unit has a method of arranging the hot air passage and the cold air passage or a plurality of doors in a compact manner, while ensuring that each air outlet is connected from the confluence of the two passages. It must be constructed so that air can be guided therethrough, and therefore it may be necessary to provide a duct integrally in the heater unit case that directly communicates the above-mentioned confluence with a specific air outlet (for example, an air outlet for a defroster). . In this case, the duct is formed by attaching a member having a U-shaped cross section to the outside of the side surface of the case, and
It is generally considered to have one end communicated with the inside of the case and the other end as an air outlet, but such a configuration may cause the following problems. In other words, when installing a U-shaped duct component on the outside of the case, if the sealing performance at the joint between the member and the outside of the case is incomplete, air will leak from the duct and enter the car from the air outlet. Not only does the amount of air flow decrease, but noise is also generated when air leaks, and if you try to perfect the sealing of the joints to prevent such problems, productivity will deteriorate and costs will increase. That's what I do. Furthermore, since the above-mentioned duct components are installed on the outside of the case where they can be seen by the public, it is necessary to apply the same paint as the case to avoid deterioration in appearance, which also increases costs. .

(Means for Solving the Problems) The present invention deals with the above-mentioned actual situation regarding air conditioners for automobiles. The first purpose is to prevent air leakage to the outside from the joint with the member and the generation of noise caused by this, and to enable the above-mentioned duct to be formed at a low cost.In addition, the above-mentioned case A second purpose is to improve the mixing of air at the confluence of the hot air passage and the cold air passage in the interior. In order to achieve this purpose, the present invention is characterized by the following configuration.

That is, the automobile air conditioner according to the present invention has the following features:
After the air introduced into the heater unit case from the air inlet is distributed by the distribution door into a hot air passage that passes through the heater core and a cold air passage that does not pass through the core, the air is merged again at the convergence part and is sent from the air outlet into the vehicle interior. In a configuration in which the heater unit case is configured to be sent to each part, and the heater unit case is divided in the width direction, a duct is provided on the cold air passage side of the distribution door in the heater unit case, and the duct is connected from the confluence part to the air outlet; This duct is composed of an outer wall of the heater unit case and an inner wall member attached to the outer wall from the inside of the case, and this inner wall member bulges into the cold air passage from the air inlet to the confluence part to narrow the passage. It is characterized by being arranged so that it can be compressed.

(Function) According to the above configuration, the duct provided integrally with the heater unit case reliably guides air from the confluence of the hot air passage and the cold air passage in the case to the defroster air outlet, for example. In particular, since the duct is composed of an outer wall of the case and an inner wall member attached to the outer wall from the inside of the case, even if air leaks from the joint between the two, this air will not leak to the outside of the case. It disappears. Therefore, even if the amount of air delivered from the air outlet decreases, there is no loss in the amount of air delivered from the heater unit as a whole, and noise caused by air leaking to the outside is prevented. Furthermore, since the inner wall member is mounted inside the case and is out of sight, painting is not necessary.

In particular, the inner wall member constituting the duct bulges out into the cold air passage from the air inlet to the confluence section,
Since the cold air passage is provided so as to be constricted, the flow velocity of the air passing through the cold air passage is increased, and the air is mixed well with the air from the hot air passage at the merging portion.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, the heater unit 1 has an outer shell formed by joining a pair of cases 2, 2 which are divided into two parts at the center in the width direction. An air inlet 3 is provided which has a substantially fan-shaped opening and into which air sent from a blower unit (not shown) is introduced.
Further, a vent air outlet 4 is provided in the upper part of the unit 1, spanning both cases 2, 2, and heater air outlets 5, 5 are provided in the side surfaces of both cases 2, 2, respectively. Further, a heater core mounting portion 6 is provided below the air inlet 3. Further, outward bulging portions 7, 7 are provided on the side surfaces of both cases 2, 2, and defroster ducts 8, 8 extend upward from these bulging portions 7, 7.
are integrally provided in the cases 2, 2, and the upper ends of these ducts 8, 8 are connected to defroster air outlets 9, 9.
It is said that

Next, the internal structure of this heater unit 1 will be explained with reference to FIGS.
Inside, a heater core 10 is installed to which engine cooling water is supplied and heats the air passing around the air inlet 3, and a distribution door 11 is provided inside the inlet 3. ing. This distribution door 11 is centered around a support shaft 11a supported at the top corner of the air inlet 3 having a substantially fan shape.
It swings between a first position along the upper side of the air inlet 3, indicated by a chain line A, and a second position, along the lower side of the air inlet 3, indicated by a chain line B, and when in the first position A, air from the inlet 3 The total amount of air introduced into the heater core 1
When the air is in the second position B, the entire amount of air is guided to the cold air passage B that does not pass through the heater core 10, and the solid line H between the first and second positions A and B When in the position shown,
Air is distributed to both passages A and B at a ratio according to their positions. The hot air passage A is guided from below the heater core 10 to the cold air passage B side along the lower circumferential surface 2a of the case 2, and both passages A and B are provided in a defroster on the side of the air inlet 3. The ducts 8 are configured to merge at a merging portion C near the entrance portion 8a. Here, the distribution door 11 has an auxiliary door 11' on the opposite side of the support shaft 11a.
is integrally provided, and when the distribution door 11 is in the second position B and blocks the air inlet 3 and the upstream part of the hot air passage A, the auxiliary door 11' is connected to the downstream part of the passage A. The confluence section C is cut off, thereby preventing the air introduced into the cold air passage B from flowing back through the hot air passage A toward the heater core 10.

Further, the confluence C of the hot air passage A and the cold air passage B communicates with the vent air outlet 4 and the heater air outlet 5 via the space D, and the vent air outlet 4 has a support shaft. A door 12 is provided which opens and closes the outlet 4 by swinging around the heater outlet 5, and a support shaft 13a is provided immediately upstream of the heater outlet 5.
A door 1 that opens and closes the outlet 5 by swinging around the
3 are provided.

Further, the merging portion C is provided with a defroster door 14 that opens and closes the inlet portion 8a of the defroster duct 8. This door 14 has a common support shaft 1 installed across the sides of the pair of cases 2, 2.
4a, and are housed in the bulges 7, 7 on the side surfaces of the case shown in FIG. The opening portions 8a, 8a of the defroster ducts 8, 8 in the two cases 2, 2 are opened and closed, respectively, by swinging between the two cases 2, 2.

Each of the defroster ducts 8 is constructed by bulging the outer wall of the case 2 to have a U-shaped cross section as shown in FIG. one end of which is connected to the above-mentioned confluence section C inside the case.
The defroster door 14 opens at one end and is opened and closed by the defroster door 14, and the other end passes through the upper circumferential wall of the case 2 and opens upward to serve as the defroster air outlet 9 described above. Here, before the pair of cases 2, 2 are joined, the inner wall member 15 is
Concave grooves 15b, 15b formed along the edges of both side portions 15a, 15a are replaced with protrusions 2c, 2c provided on both sides of the bulged portion 2b on the inner surface of the case 2.
It is attached to the inside of the case 2 by engaging with the case 2.

In particular, the inner wall members 15 are provided on the cold air passage B side of the distribution door 11 inside the pair of cases 2, 2, and protrude in opposite directions into the cold air passage B to provide an air inlet. 3 to the confluence section C is constricted from both sides.

The distribution door 11 is swung by operating a temperature control lever provided in the driver's seat of the vehicle, and the other doors 12, 13, and 14 are opened and closed by operating a ventilation mode switching lever. ing. Further, seal members made of urethane or the like are attached to both sides of each door 11 to 14 to prevent air leakage when the doors are closed.

According to the above configuration, the air introduced into the cases 2, 2 of the heater unit 1 from the air inlet 3 is
When the distribution door 11 is in the first position A, the air is guided to the hot air passage A, when the door 11 is in the second position B, the air is guided to the cold air passage B, and when the door 11 is in the intermediate position C, the air is guided to the hot air passage A. It is divided into passages A and B, and in both cases, from the confluence C to the doors 12 and 1.
The air flows through the open doors 3 and 14 toward the corresponding air outlets 4, 5, and 9, and is further sent out from the outlets to the air outlets in various parts of the vehicle. In that case, since the air passing through the warm air passage A is heated by the heater core 10, the amount of air blown into the car depends on the amount of air passing through the passage A, that is, the position of the distribution door 11. The temperature will be regulated.

Of the air outlets 4, 5, and 9, the defroster air outlet 9 is located relatively far from the confluence C, but a defroster duct 8 is provided between the outlet 9 and the confluence C. Therefore, defroster air is reliably delivered when the defroster door 14 is opened.

In particular, since the defroster duct 8 is formed by mounting the inner wall member 15 on the inside of the outer wall of the case, both sides 15 of the member 15
a, the edge of 15a and the bulge 2b in case 2
Even if air leaks from the joints with the inside sides of the
This air does not flow out to the outside, but is introduced into the duct 8 again from the inlet 8a and sent out as defroster air, or if another air outlet is open, it is sent from that outlet to the air outlets in various parts of the car. It will be sent out. In other words, the air introduced from the blower unit into the heater unit 1 will not leak out unnecessarily, preventing the loss of blowing air, and also reducing noise caused by air leaking outside the case. There is no occurrence of

Furthermore, since the inner wall members 15, 15 constituting the defroster ducts 8, 8 are mounted inside the cases 2, 2 and are not visible from the outside, painting or coloring is not necessary.

Moreover, since the inner wall members 15, 15 having a U-shaped cross section and forming the defroster ducts 8, 8 are provided so as to constrict the cold air passage B extending from the air inlet 3 to the confluence part C, the cold air passage B The flow velocity of the air passing through the hot air passage A at the confluence section C is increased.
As a result, air of uniform temperature is sent out from the heater unit 1.

(Effect of the invention) According to the air conditioner for a vehicle according to the invention as described above, when a duct for a defroster or the like is integrally provided in the heater unit case, this duct is connected to the outer wall of the case and the inside of the case. Since the case is configured with an inner wall member that is attached to the inner wall member, even if air leaks from the joint between the case and the inner wall member, the blown air will not flow outside. As a result, problems such as an insufficient amount of air being blown to various parts of the vehicle can be prevented, and noise caused by air leaking outside can be avoided. Therefore, there is no need to unnecessarily increase the sealing performance of the joint, and productivity is improved and costs are reduced accordingly. Furthermore, since the inner wall members are not visible to the public, there is no need to paint them, which also reduces costs. In particular, according to the present invention, the flow velocity of the air passing through the cold air passage is increased and mixing with the air from the hot air passage is performed well, so that air with a uniform temperature is sent into the vehicle interior. Become.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall perspective view of a heater unit, FIG. 2 is a sectional view showing the internal structure of the unit, and FIG. 3 is a cross-sectional view of the heater unit.
FIG. 3 is a sectional view of a main part taken along a line. 1... Heater unit, 2... Case, 3...
Air inlet, 8...Duct, 9...Air outlet, 10
...Heater core, 11...Distribution door, 15...Inner wall member, A...Hot air passage, B...Cold air passage, C...
...merging section.

Claims (1)

[Scope of utility model registration request] After the air introduced into the heater unit case from the air inlet is distributed by the distribution door into a hot air passage that passes through the heater core and a cold air passage that does not pass through the core, the air is merged again at the convergence part and is sent from the air outlet into the vehicle interior. The air conditioner for an automobile is configured to send air to each part, and the heater unit case is divided in the width direction, and the air conditioner is configured such that the heater unit case is divided in the width direction, from the confluence part to the air outlet on the cold air passage side of the distribution door in the heater unit case. A duct is provided which communicates with the heater unit case, and this duct is composed of an outer wall of the heater unit case and an inner wall member attached to the outer wall from the inside of the case, and this inner wall member is connected to the inside of the cold air passage from the air inlet to the confluence section. 1. An air conditioner for an automobile, characterized in that the air conditioner is provided so as to bulge out to constrict the passage.