JPH0676005B2 - Automotive air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automobile air conditioner, and more particularly to an automobile air conditioner of the type described above that can reduce operating noise.

<Prior Art> Conventionally, a vehicle air conditioner is disposed between an instrument panel and a dashboard, and includes a blower unit, a cooling unit, a heating unit, a cool air / warm air mixing unit, and a regulated air. The respective devices of the distribution unit were arranged in series in the width direction of the vehicle body, and the duct was routed to the air outlet provided in the instrument panel.

According to such a conventional structure, the ventilation passage is long and inevitably bent in a complicated manner, and the cross-sectional area of the ventilation passage cannot be made large. Therefore, in order to obtain a predetermined heat exchange capacity, a heat exchanger is required. It must be long along the streamline of the ventilation. Therefore, since the ventilation resistance of the entire ventilation passage increases, it is necessary to provide a blower that generates a high wind pressure in order to obtain a predetermined air volume, and therefore the operating noise of the blower tends to be excessive.

<Problems to be Solved by the Invention> In view of the above-mentioned drawbacks of the conventional technology, a main object of the present invention is to provide an air conditioning apparatus for a vehicle capable of obtaining a predetermined blowout air amount at a relatively low temperature amount. To do.

<Means for Solving Problems> According to the present invention, such an object is to provide a ventilation duct that defines an ventilation passage between an air intake port and an air outlet port, and a ventilation flow in the ventilation duct. An air conditioner for an automobile, comprising: a blower for generating a heat exchanger; and an air-cooling heat exchanger and an air-heating heat exchanger that are arranged in series in the ventilation duct with respect to an air stream line of the blower. Then, the blower
The air-cooling heat exchanger has a rotating shaft extending in the width direction of the vehicle body, and has a blowing width extending at least between the front-rear direction center line of the vehicle body and the passenger seat side center line. Also, for a vehicle characterized in that the air receiving surface of the air heating heat exchanger has a width substantially equal to the air blowing width and is arranged orthogonal to the air blowing direction of the air blower. This is accomplished by providing an air conditioner.

<Operation> In this way, since the blower width of the blower becomes laterally long in the vehicle body width direction, it is possible to open some of the air outlets at predetermined positions in the vehicle interior without interposing ducts, A reduction in ventilation resistance can be achieved. Furthermore, by making both heat exchangers laterally long in the width direction of the vehicle body according to the length of the blower, the dimension of the airflow in the streamline direction can be shortened. A low wind speed is possible.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the structure of an air conditioner 1 according to the present invention, in which each device is housed in an integral housing 2. Outside air inlets are opened at the lower portions of both ends of the housing 2, and an intake duct 3 erected from the inlets allows
It is designed to allow the introduction of the atmosphere.

An inside air introduction port 4 for introducing the air in the vehicle compartment is provided on the lower side of the housing 2, and the opening and the outside air introduction port are appropriately selected by a damper 5 (only the inside air introduction port side is shown). It can be opened or closed.

Immediately downstream of the airflows of both of the above-mentioned inlets, a core 6 of an evaporator as a heat exchanger for cooling which disperses a refrigerant such as Freon gas into the intestine is arranged. The core 6 includes a flat tube through which the refrigerant flows, and a corrugated fin that connects the tubes adjacent to each other.
It is formed horizontally long and thin along the width direction of the vehicle.

On the downstream side of the core 6 of the evaporator, a cross flow fan 7 having a horizontally long blade whose rotation axis extends along the width direction of the vehicle is arranged. The fan 7 has a width substantially equal to that of the core 6 of the evaporator, and can generate an air flow evenly over the entire width of the blade.

On the discharge side of the cross flow fan 7, a heater core 8 as a heat exchanger for heating having a width substantially equal to that of the core 6 of the evaporator is arranged. The heater core 8 includes a tube through which engine cooling water flows, a heat medium flow portion 8a formed by connecting adjacent ones of the tubes with corrugated fins, and a space portion 8b in which heat is not exchanged. They are stacked alternately at intervals. Both these parts 8a, 8b
The shutter device 9 that moves up and down allows the opening areas of the two to be adjusted appropriately. By mixing hot air and cold air, it is possible to adjust the air temperature to an arbitrary value. Has been done.

On the wall surface of the housing 2 facing the front surface of the heater core 8, a first blowout port 10 on the center front face, a second blowout port 11 on the lower face of the center, and a third blowout port 12 on the front side surface (see FIG. 2). )
, And a defroster duct 13 on the upper surface immediately downstream of the heater core 8, and a fourth outlet 14 for the driver's seat side on the right side surface of the housing 2 in FIG. A duct 15 for blowing air is provided.
A damper is provided at each of these outlets so that the outlet can be appropriately selected by operating a lever or switch provided on an instrument panel (not shown).

The evaporator core 6, the crossflow fan 7 and the heater core 8 are arranged in parallel with each other, and the evaporator core 6 part and the heater core 8 part are separated by the partition wall 16 with the crossflow fan 7 in the middle. There is. Therefore, when the cross flow fan 7 is operated, the air sucked from below the air conditioner 1 via the intake duct 3 or the inside air inlet 4 is cooled when passing through the core 6 of the evaporator.
The cross flow fan 7 can change the flow direction toward the rear of the vehicle. When passing through the heater core 8, the shutter device 9 works to mix the air that is still cold and the heated air, and the conditioned air is blown out from the outlets toward the inside of the vehicle. In addition, in the case of the present embodiment, since the core 6 of the evaporator is arranged at the lower side position of the cross flow fan 7, there is no fear that the condensed water is scattered by the fan.

As shown in FIG. 2, the entire air conditioner 1 including both heat exchange cores 6 and 8 and the cross flow fan 7 extends from the passenger seat side to the driver seat side with respect to the longitudinal centerline C of the vehicle. It is arranged horizontally. Therefore, the first to third outlets
10 to 12 can be formed integrally with the housing 2, and the structure can be simplified. In particular, the width of the entire air conditioner 1 including the close flow fan 7 may be wide so as to exceed the range between the center line on the passenger seat side and the center line of the vehicle body.

FIG. 3 shows a modified embodiment according to the present invention.
Portions corresponding to those in the figure are designated by the same reference numerals, and description thereof will be omitted.

In the first embodiment, the cross flow fan 7 is arranged above, whereas in this embodiment, the cross flow fan 7 is arranged below. By doing so, the outside air can be taken in directly from the dashboard upper (not shown) of the vehicle body through the opening 17, and the intake duct 3 can be omitted.

In the above embodiment, the blower and the cross flow fan are used. However, as shown in FIGS. 4 and 5, a plurality of sirocco fans 22 each having an independent scroll casing 21 are coaxially arranged. May be connected to each other and operated by a common motor 23.

Further, as the heater core, the heat medium circulating portion and the space portion are alternately laminated, but as in the conventional type, a cold air passage bypassing the heat exchanger is provided and a butterfly type damper is operated to cool the heat medium. You may make it mix warm air.

<Effects of the Invention> As described above, according to the present invention, since the heat exchanger area can be increased and the ventilation resistance can be reduced, it is possible to reduce the speed of the blast air, and it is extremely effective in quieting the passenger compartment. Can be played.

In addition, since the duct structure can be simplified and the core of the heat exchanger can be made thin, the structure is compact, and there is no inconvenience that water droplets from the cooling heat exchanger are scattered into the passenger compartment due to the low wind speed. The effect of improving comfort and usability is also great.

[Brief description of drawings]

FIG. 1 is a schematic structural diagram of an air conditioner according to the present invention. FIG. 2 is a layout view of essential parts showing the relationship between the vehicle and the air conditioner shown in FIG. FIG. 3 is a structural diagram similar to FIG. 1 showing a modified embodiment of the present invention. 4 and 5 are explanatory views showing another embodiment. 1 ... Air conditioner, 2 ... Housing 3 ... Intake duct, 4 ... Inside air inlet port 5 ... Damper, 6 ... Evaporator core 7 ... Cross flow fan 8 ... Heater core, 8a ... Heat Medium 8b ... Space portion, 9 ... Shutter device 10 ... First outlet, 11 ... Second outlet 12 ... Third outlet, 13 ... Defroster duct 14 ... Fourth outlet Mouth, 15 …… Blower duct 16 …… Baffle, 17 …… Opening 21 …… Scroll casing 22 …… Sirocco fan, 23 …… Motor

Claims (1)

[Claims] 1. A ventilation duct that defines a ventilation path between an air intake port and an air outlet, a blower that generates an airflow in the ventilation duct, and an air flow by the blower in the ventilation duct. An air conditioner for an automobile having an air cooling heat exchanger and an air heating heat exchanger arranged in series with respect to a wire, wherein the blower has a rotating shaft extending in a width direction of a vehicle body. Have,
And at least has a blowing width over a range between the front-rear direction center line of the vehicle body and the passenger seat side center line, the air-cooling heat exchanger and the air-receiving surface of the air heating heat exchanger, An air conditioner for a vehicle, which has a width substantially equal to the blowing width and is arranged orthogonal to the blowing direction of the blower.