JPH04103428A - Air conditioner for bus - Google Patents

Abstract

PURPOSE:To prevent suction of dust from an open air introducing port to reduce fouling of respective parts and improve reliability of them by arranging an open air introducing port on a position over the floor face so as to be hard to suck dust, and communicating the open air introducing port to an air conditioning unit through a suction duct. CONSTITUTION:When a bus 9 is run, dust is rolled up with front wheels 90, but the dust is hardly sucked into an open air introducing port 1, because it is arranged over the floor face. Namely, clean open air A sucked through the open air introducing port 1 is introduced to an air conditioning unit 8 through a suction duct 2 and a through hole 3. The open air is, after conditioning temperature in the air conditioning unit 8, fed into a vehicle room through the blowoff grille 730 of a cooler duct 73. Inner air B in the vehicle room is circulated with the air conditioning unit 8. Thus, because dust is hardly sucked, fouling of an air filter 85 is reduced. Further, an open air filter can be removed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sub-engine type air conditioner in a 7-bus vehicle, and specifically relates to an arrangement structure of an outside air intake port for introducing outside air into an air conditioner unit. Regarding.

[Prior art] In the conventional sub-engine air conditioner for bus vehicles,
Figures 5 and 6 are used due to vehicle loading space, rear wheel load, etc.
As shown in the figure, the air conditioner unit 8 is located behind the front wheels 90 of the lotus vehicle 9 and is disposed below the floor surface 94.

An outside air introduction lower 0 for introducing outside air into the air conditioner unit 8 is disposed on the vehicle outer panel 91 below a floor surface 94. A ventilation damper 75 is disposed on the front surface of the cooling case 81 of the air conditioner unit 8 in correspondence with the outside air introduction lower 0. In addition, the cooling case 8
1, an inside air gas sensor 8B and an outside air gas sensor 89 are attached. Although not shown, the internal air gas sensor 8
An inside temperature sensor is disposed near 8. Further, an outside temperature sensor is disposed near the outside gas sensor 89.

In FIG. 5, reference numeral 72 indicates a heater duct having an outlet grille 720, and reference numeral 73 indicates a tara duct having an outlet grille 730, which are connected to the air conditioner unit 8. Further, in the figure, 95 indicates a side window. In Fig. 6, 82 is a blower, 83 is a heater core, 84 is an evaporator, 85 is an internal air filter,
86 indicates a ventilation fan, these are air conditioner unit 8
It consists of Further, in the figure, 71 indicates an outside air filter, 92 indicates a vehicle inner plate, and 93 indicates a heat insulating material.

In the air conditioner unit 8, when automatically controlling ventilation, an inside air gas sensor 88 and an outside air gas sensor 89 detect the gas concentration of inside and outside air and determine the ventilation mode.

That is, the gas concentration inside the vehicle is detected by the inside air gas sensor 88, and ventilation is controlled in four modes from ventilation OFF mode (REC) to ventilation H1 mode (FRESH) depending on the gas concentration.

In the ventilation OFF mode (REC), the ventilation damper 75 is in a closed state and the ventilation fan 86 is in a stopped (OFF) state. In addition, in the ventilation Lo mode, the ventilation damper 75 is in an open state, the ventilation fan 86 is in a stopped (OFF) state, and the blower 82 is in an open state.
Ventilate only with negative pressure.

In addition, in the ventilation Me mode, the ventilation damper 75 is in an open state,
The ventilation fan 86 is in the Lo mode (for example, the voltage applied to the drive motor is 12V).

In addition, in the ventilation Hi mode, the ventilation dumbbag 5 is in the open state,
The ventilation fan 86 is in a Hi mode (for example, the voltage applied to the drive motor is 24 cm).

At this time, the outside air gas sensor 89 detects that the outside air introduction lower
Detects the concentration of gases such as automobile exhaust gas in the air outside the vehicle introduced from the vehicle. 1. For example, if the outside air is dirty, such as inside a tunnel, the ventilation damper 75 is closed,
The ventilation fan 86 is turned off (OFF). Additionally, when the outside air becomes clean, the system is controlled to return to its original state.

[Problem to be solved] However, in conventional bus air conditioning systems,
Since the outside air introduction lower 0 is located immediately behind the front wheel 90,
When the vehicle is running, air contaminated with dust, dirt, etc. may enter the cooling case 81.

However, the inside air gas sensor 88 and the outside air gas sensor 89 used in the above-mentioned air conditioner are of a type that detects the concentration of gas such as exhaust gas through oxidation and reduction reactions, and hardly react to dust and the like. Therefore,
As described above, the ventilation damper 75 of the outside air introduction lower 0 cannot be controlled to open or close depending on how dirty the outside air is.

Therefore, the air conditioner unit 8 sucks dust such as dust kicked up by the front wheels 90 from the outside air introduction lower 0. Therefore, the outside air filter 71 becomes dirty, the detection section of the outside air gas sensor 89 is clogged, the ventilation fan 86 becomes dirty, and the air filter 85 becomes dirty.

As a result, the air volume decreases, the frequency of maintenance of the filters 71.85 increases, the ventilation mode malfunctions due to worsening of the responsiveness of the outside air gas sensor 89, the reliability of the drive motor of the ventilation fan 86 decreases (the life span decreases), the heater core 83 and the evaporator 84 cause clogging. In addition, the in-car air outlet grill 7
Dirt occurs near 20,730.

In view of such conventional problems, the present invention can prevent dust from being sucked in from the outside air inlet, thereby reducing contamination of each component and improving its reliability. The purpose is to provide an air conditioning system for buses.

(1 [Means for solving 1!]) The first invention of the present application is a bus vehicle in which an air conditioner unit is disposed below the floor surface and an outside air inlet for introducing outside air into the air conditioner unit is provided on the outer panel of the vehicle. In the above, the outside air inlet is located above the floor surface so that it is difficult to inhale dust, and the outside air inlet and the air conditioner unit are located between the outer panel of the vehicle and the inner panel of the vehicle. The present invention provides an air conditioner for a lotus vehicle, characterized in that the air conditioners communicate with each other through a suction duct.

What is most noteworthy about the first invention is as follows.

To prevent dust from being sucked in by winding up the front wheels,
The reason is that the outside air inlet is arranged on the outer panel of the vehicle at a position above the floor surface where it is difficult to inhale dust. Another advantage is that the outside air inlet and the air conditioner unit are communicated with each other by means of an intake duct that is provided by utilizing the space between the outer panel and the inner panel of the vehicle.

The above-mentioned suction duct may be disposed from the outside air inlet to the floor (see FIG. 1), or may extend further below the floor (see FIG. 3).

Further, the second invention of the present application is such that an air conditioner unit is disposed below the floor surface, an intake duct for introducing outside air is connected to the air conditioner unit, and the intake duct is attached to the outside of the vehicle and has two or more The air conditioner for a lotus vehicle is characterized in that the outside air inlet is provided above the floor surface at a position where it is difficult to suck in dust.

The most noteworthy feature of the second invention is that an intake duct is provided on the outside of the vehicle in communication with the air conditioner unit, and its outside air inlet is located above the floor surface so that it is difficult to inhale dust. That's true. This allows the intake duct to be easily attached to the HAS vehicle currently in use.

In the first and second inventions, the "position above the floor surface where dust is difficult to be sucked in" includes, for example, a height position near the side window.

[For production]

In the first invention, since the outside air inlet is disposed above the floor surface in a position where it is difficult to suck in dust, hardly any dust kicked up by the front wheels is sucked in when the vehicle is running.

Further, the clean outside air sucked in from the outside air inlet is introduced into the air conditioner unit through an intake duct provided between the vehicle outer panel and the vehicle inner panel, and is further blown into the vehicle interior from the air conditioner unit.

At this time, the outside air passes through an outside air filter, each component of the outside air gas sensor air conditioner unit, an outlet grill, and the like. Also,
Air inside the car is circulated through the air conditioning unit. °
As mentioned above, since the outside air is clean, each part is free from dirt and clean air can be blown.

In the second invention, outside air is introduced into the air conditioner unit from the outside air inlet through the intake duct attached to the outside of the vehicle. Further, it exhibits the same effect as the first invention.

Furthermore, 1 the intake duct can be easily attached to the vehicle outer panel of a bus vehicle in use.

〔effect〕

Therefore, according to the first aspect of the invention, it is possible to prevent dust from being sucked in from the outside air inlet, thereby reducing dirt on each component and improving reliability thereof. An air conditioner for a bus can be provided.

Further, according to the second invention, in addition to the effects of the first invention, it is possible to provide an air conditioner for a bus vehicle in which an intake duct can be easily attached.

[Example] First Example Regarding the air conditioner for a lotus vehicle according to the example of the first invention,
This will be explained using FIGS. 1 and 2.

In the device of this example, the air conditioner unit 8 is disposed below the floor surface 94. Further, the vehicle outer panel 91 is provided with an outside air introduction port 1 for introducing outside air into the air conditioner unit 8. The outside air inlet 1 is arranged above the floor surface 94 at a position where it is difficult to suck in dust. In addition, 1 outside air inlet 1
The air conditioner unit 8 and the air conditioner unit 8 are communicated through an intake duct 2 provided between a vehicle outer panel 91 and a vehicle inner panel 92.

The outside air inlet 1 is as shown in FIGS. 1 and 2,
It is provided on the vehicle outer panel 91 at the front and rear positions of the vehicle corresponding to the air conditioner unit 8. Further, the outside air inlet 1 is provided at a position above the floor surface 94 and near the side window 95.

The intake duct 2 also includes a vehicle outer panel 91 and a vehicle inner panel 9.
Insulating material 93 filled between 2 and 2.

A notch is formed extending from the outside air inlet 1 to the floor surface 94. At this time, in order to maintain the heat insulation effect, a slightly thick heat insulating material 93 is left on the vehicle inner plate 92 side.

Furthermore, a through hole 3 is bored in the floor surface 94 to allow communication between the suction duct 2 and the air conditioner unit 8. In addition, in the suction duct 2, one is made to correspond to the outside air introduction port 1,
The outside air gas sensor 89 and the ventilation damper 75 are provided.

The rest is the same as the conventional example.

Since the device of this example is configured as described above, it exhibits the following effects.

That is, when the bus vehicle 9 is running, dust is kicked up by the front wheels 9 degrees, but in this example, the outside air inlet 1 is located at a high place above the floor surface, so hardly any dust is sucked in. That is, as shown by arrow A in FIG. 1, clean outside air sucked in from the outside air inlet 1 is introduced into the air conditioner unit 8 via the intake duct 2 and the through hole 3. After the outside air is temperature-adjusted by the air conditioner unit 8, it is sent into the vehicle from the outlet grille 730 of the Tara duct 73.

At this time, the inside air gas sensor 88 detects the concentration of gas such as carbon dioxide gas inside the vehicle, and ventilation control is performed in four modes from ventilation REC to F RE S H depending on the gas concentration. Further, an outside air gas sensor 89 detects the concentration of gases such as automobile exhaust gas outside the vehicle, and controls the ventilation damper 75 to be closed when the outside air is dirty and to open the ventilation damper 75 when the outside air is clean.

In addition, the inside air inside the car is as shown by arrow B.
It is circulated by the air conditioner unit 8.

In this example, as described above, since hardly any dust is sucked in, the air filter 85 becomes less dirty. This improves maintainability.

Furthermore, it is possible to eliminate the seven outside air filters.

This makes it possible to reduce costs.

Further, mud and dust do not adhere to the outside air temperature sensor 1 and the outside air gas sensor 89. This allows for accurate temperature control ventilation control.

Furthermore, since the number of times the outside air gas sensor 89 detects dirty air decreases, the number of times the ventilation damper 75 is activated correspondingly decreases. This improves the reliability of the servo motor linkage for operating the ventilation damper 75.

Also, the two ventilation fans 86 and their drive motors become less dirty. This improves the reliability of the drive motor.

In addition, the heater core 83. The evaporator 84 will not be clogged. This improves the reliability of the air conditioner unit 8. Further, no dirt is generated near the outlet grilles 720 and 730 inside the vehicle. In addition, the air volume also increases significantly.

Second Embodiment An air conditioner for a bus according to this embodiment will be explained with reference to FIG.

In the first embodiment, the suction duct 2 is provided from the outside air inlet I to the floor surface 94, but in this example, the lower part of the suction duct 4 is provided to extend further below the floor surface 94. be.

Further, the suction duct 2 shown in the first embodiment has a heat insulating material 9
3 is formed by cutting out the intake duct 3, whereas the intake duct 4 in this example is defined by a frame 40 provided between a vehicle outer panel 91 and a vehicle inner panel 92.

The lower part of the intake duct 4 communicates with an air conditioner unit 5. The air conditioner unit 5 is formed so that its length in the vehicle width direction is reduced by the thickness t of the suction duct 4.

The rest is the same as the first embodiment.

Note that if the vehicle width dimension is increased by the thickness dimension t of the intake duct 4, it is possible to use the same air conditioner unit 8 as in the first embodiment.

The device of this example is configured as described above.

The same effects as in the first embodiment can be obtained.

Third Embodiment Regarding the bus vehicle air conditioner according to the embodiment of the second invention,
This will be explained using FIG.

In this example device, an air conditioner unit 8 is disposed below the floor surface 94, and an intake duct 6 for introducing outside air is connected to the air conditioner unit 8.
is attached to the outside of the vehicle. Further, the outside air inlet 60 of the suction duct 6 is provided above the floor surface 94 at a position where it is difficult to suck in dust.

In the first and second embodiments, the space between the vehicle outer panel 91 and the vehicle inner panel 92 was used as the intake duct, whereas in this example, the intake duct 6 was placed on the vehicle outer panel 91. It is installed protrudingly.

The suction duct 6 is arranged in the vertical direction from a position near the two side windows 95 to the air conditioner unit 8.

An outside air inlet 60 that opens laterally is provided at the upper part of the suction duct 6. Further, the lower part of the suction duct 6 communicates with the air conditioner unit 8. The ventilation damper 75 is provided on the air conditioner unit 8 side.

The rest is the same as the first embodiment.

The device of this example is configured as described above.

It exhibits the same effects as the first embodiment of the front rudder.

Furthermore, the intake duct 6 can be easily attached to a lotus vehicle currently in use. Furthermore, since the thickness of the heat insulating material 93 is not reduced, there is no risk of impairing the heat insulating effect.

In other words, since the ventilation damper 75 is arranged on the side of the air conditioner unit 8, the position of the two outside air introduction holes 60 can be easily changed in the vertical direction without changing the installation position of the air conditioner unit 8. I can do it.

[Brief explanation of the drawing]

1 and 2 show an air conditioner for a bus vehicle according to a first embodiment of the first invention, FIG. 1 is a sectional view of the main part thereof, and FIG.
The figure is a side view of essential parts of a bus vehicle, FIG. 3 is a sectional view of essential parts of an air conditioner for a lotus vehicle according to the second embodiment of the first invention, and FIG. 5 and 6 show a conventional example, FIG. 5 is a front perspective view of a lotus vehicle, and FIG. 6 is a sectional view of the main part of the air conditioner. 111. Outside air inlet 201. Suction duct 410. suction duct. 50. , air conditioner unit 600. suction duct. 6'0. , , outside air inlet 5 890. Air conditioner unit 91, , vehicle outer panel 92, , vehicle inner panel

Claims (2)

[Claims] (1) In a bus vehicle in which the air conditioner unit is installed below the floor surface and an outside air inlet is provided on the outer panel of the vehicle to introduce outside air into the air conditioner unit, the outside air inlet is located above the floor surface. A bus characterized in that the outside air inlet and the air conditioner unit are arranged in a position where it is difficult to inhale dust, and the outside air inlet and the air conditioner unit are communicated with each other by an intake duct provided between the outer panel of the vehicle and the inner panel of the vehicle. Vehicle air conditioning system. (2) An air conditioner unit is installed below the floor surface, and an intake duct for introducing outside air is connected to the air conditioner unit, and the intake duct is attached to the outside of the vehicle, and the outside air intake port is connected to the air conditioner unit. An air conditioning system for a bus vehicle, characterized in that it is installed in a position above the floor surface where it is difficult to suck in dust.