JPH11245651A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optimum cooling space taking into consideration solar radiation, load and the like. SOLUTION: A first diffuser 19 is provided at the bottom part of a cooling duct 13 provided at the ceiling part of a vehicle openable/closable by a shutter, and a second diffuser 23 is provided for the side surface of the cooling duct 13 openable/closable a shutter. In this case, a load rate detection means detecting the load rate of an air conditioner, and a solar radiation sensor detecting the direction of solar radiation to the vehicle are provided, and the opening of the first and second shutters is controlled based on the detection result of the detecting means and the solar radiation sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air conditioner for a large vehicle such as a bus.

[0002]

2. Description of the Related Art FIG. 7 shows a partial outline of an example of a conventional air conditioner installed in a bus. As shown in this figure, a cooling duct 101 is disposed along the front-rear direction at a corner (above the window) of the ceiling of the bus. An outlet 103 is formed on the lower surface of the cooling duct 101 so as to correspond to each seat 102. The outlet 103 is provided with a knob that can manually adjust the wind direction and air volume. Cooling air is supplied to the cooling duct 101 from a cooling device (not shown) installed under the floor or the like.

[0003] The outlet 103 is a nozzle type.
The cold air is blown out in a spot to some extent. In FIG.
Here, the arrow a indicates the direction of blowing cold air, and a₁, A
_Two, A _Three, A_FourIndicates the spread of the flow of cold air.

[0004]

In the conventional air conditioner as described above, since cool air is blown out in a spot manner, a temperature distribution occurs in the vehicle interior space. Therefore, seat 1
Even if the passenger on 02 desires a cooling air of a light breeze, such a cooling air cannot be obtained, which may impair comfort. further,
The draft sensation caused by the spot cold air blowing for a long time may cause discomfort.

[0005] Further, in a vehicle, there may be a case where there is a side on which solar radiation is applied and a side on which no sunlight is applied. However, it is too cold or not enough for the other passenger. In particular, when the load of cooling is large, such influence is apt to occur.

The invention according to the present invention has been made in view of the above situation, and has as its object to provide a vehicle air conditioner capable of supplying cool air in consideration of the situation and improving comfort. .

[0007]

Means for Solving the Problems According to the invention of claim 1 of the present application for solving the above-mentioned problems, a first air outlet is provided at the bottom of a cooling duct provided on both right and left sides of a vehicle ceiling, The first outlet can be opened and closed by a first shutter, and a second outlet that opens in the vehicle width direction is provided on a side surface of the cooling duct. A shutter for detecting the degree of load of a cooling device for supplying cooling air to the cooling duct, a solar radiation sensor for detecting the direction of solar radiation to the vehicle, and a control unit for air conditioning. Equipped, the load degree detecting means determines that the load is high and the first and second shutters of the cooling duct on the side where the solar radiation is detected by the solar radiation sensor are opened, and the solar radiation is detected. Sa Cooling duct without side is a vehicle air-conditioning system, characterized by controlling so as to be open only the second shutter.

In the air conditioner for a vehicle according to the present invention, at the time of cooling and high load in which a sense of draft is easily felt, the insolation side is detected by the insolation sensor, and the first and second shutters are opened on that side. Crew (passenger)
Is supplied with cold air in a spot. On the side where there is no solar radiation, only the second shutter is opened, and cool air is supplied entirely from above the occupant.

The invention according to a second aspect of the present invention provides a guide on the vehicle ceiling for diverting the air distribution from the second outlet into a plurality in the vehicle width direction and for diverting the air distribution toward the occupant. It is a vehicle air conditioner characterized by being provided. According to the vehicle air conditioner according to the present invention, since the cool air blown out in the vehicle width direction is divided and guided by the guide, the temperature around the occupant is more uniform.

The control by the control means can be performed not only for the left and right sides of the vehicle but also for each seat. In this case, an optimal air-conditioned space can be obtained for each passenger.

[0011]

FIG. 1 schematically shows a vehicle air conditioner according to an embodiment of the present invention. This is an application of the present invention to a large bus. 2 shows an enlarged cross section of the cooling duct in FIG. 1, and FIG. 3 shows a perspective external view of a part of the guide vane at the ceiling in FIG.

As shown in FIG. 1, cooling ducts 13 of a cooling / cooling air conditioner are arranged on both left and right sides of a ceiling portion 12 in a passenger compartment of a bus 11 along a front-rear direction. The cooling duct 13 is disposed diagonally above the seat 14 and the window 1
5 above. Cooling air is supplied to the cooling duct 13 from a cooling / cooling air conditioner. Floor 16 below seat 14
A heating duct 18 extending in the front-rear direction along the side wall 17 is disposed on the upper side. The heating duct 18 is connected to a cooling / heating air conditioner, and is supplied with hot air. FIG. 1 shows only the left half as viewed from the front of the bus 11.

A first outlet 19 is provided at the bottom of the cooling duct 13 and opens downward. The first outlet 19 is located, for example, corresponding to each seat 14. Each first outlet 19 has a nozzle shape,
A louver 20 for guiding the wind is provided at the exit portion. The louver 20 is angled so that when two seats 14 are arranged, the wind can be guided to both. In other words, all louvers 20
Is not the same, but the wind is sent evenly to both adjacent seats 14. Of course, the angle of the louver 20 can be freely changed.

Inside the first outlet 19 of the cooling duct 13, a first shutter (shutter A) 21 for opening and closing the first outlet 19 is rotatably provided. The shaft provided at the base of the first shutter 21 is connected to a driving motor 22 as driving means via a driving force transmission mechanism. That is, the driving motor 2
By the drive of 2, the first shutter 21 rotates, and the first outlet 19 is opened and closed. First shutter 2
By changing the opening position of 1, the opening amount of the first outlet 19 is changed, and the amount of air blown from the first outlet 19 is changed. In FIG. 2, the first line is indicated by a solid line.
An open position of the shutter 21 is shown, and a closed position is shown by a two-dot chain line.

A second air outlet 23 which opens in the vehicle direction is provided at an upper portion of the side surface of the cooling duct 13. The second outlet 23 is, for example, the first outlet 1
9 are provided. Each of the second outlets 23 has a nozzle shape, and a louver 24 for guiding cool air toward the ceiling 12 in the vehicle width direction is provided at an outlet portion thereof. The angle of the louver 24 may be fixed or freely changeable.

Inside the second outlet 23 in the cooling duct 13, a second shutter (shutter B) 25 for opening and closing the second outlet 23 is rotatably provided. The shaft provided at the base of the second shutter 25 is connected to a driving motor 26 as driving means via a driving force transmission mechanism. That is, the driving motor 2
By the drive of 6, the second shutter 25 rotates, and the second outlet 23 is opened and closed. Second shutter 2
By changing the open position of 5, the opening amount of the second outlet 23 is changed, and the amount of cool air blown from the second outlet 23 in the vehicle width direction is changed. In FIG. 2, a solid line indicates an open position of the second shutter 25, and a two-dot chain line indicates a closed position.

On the ceiling 12 of the bus 1, a plurality of guide vanes 27a, 27b, 27c, 27d are supported as guides. The guide vanes 27a to 27d are supported at different positions in the vehicle width direction.
Ends a to 27d on the inner side in the vehicle width direction are curved downward to guide cool air. The cool air blown out from the second blowout port 23 is supplied to the ceiling 12 and each guide vane 2.
7a to 27d, and is guided above both adjacent seats 14. Guide vanes 27a to 27
For example, d is provided by being divided into a plurality in the front-rear direction of the vehicle. The guide vanes 27a to 27d are supported on the ceiling 12 by stays (not shown) or the like. Of course, the guide vanes 27a to 27d are provided on the right and left sides of the ceiling portion 12, respectively.

Although not shown, the bus 11 is equipped with a solar radiation sensor. The solar radiation sensor detects the solar radiation and thereby determines from which direction the sun is coming. As the solar radiation sensor, there are a type provided on each of the left and right sides of the bus, and a type capable of detecting the direction of the solar radiation with one sensor.

Although not shown, a cooling / heating air conditioner for sending cool air to the cooling duct 13 and sending warm air to the heating duct 23 is provided below the floor. Also,
The vehicle is equipped with an automatic air conditioner control device (control means) for controlling the air conditioner, and air conditioning is controlled by the automatic air conditioner control device. The drive motor 2
The operation commands 2 and 26 are also issued from this control device.

Next, a control pattern according to the embodiment will be described with reference to FIG. This control pattern is an example of the case where the left and right sides of the bus passage are separately controlled. When the auto air conditioner is turned on, it is determined whether it is during cooling or heating.If it is during cooling, it is determined whether it is under high load or low load. Is determined, and in some cases,
It is determined whether the air conditioner is at the start of cooling or in a steady state. If the air conditioner is at the start of cooling, the pattern (1) is taken. If the air conditioner is in the steady state, the pattern (2) is taken.

When the load is high and there is no solar radiation, pattern (3) is taken. When the load is low during cooling, pattern (4) is taken. If it is determined that heating is being performed when the automatic air conditioner switch is turned on, a pattern (5) that is a heating pattern is taken. In FIG. 5, an arrow a indicates a flow of cool air from the first outlet 19, and an arrow b indicates a flow of cool air from the second outlet 23.

The process of taking such a pattern will be described with reference to the flowchart of FIG. When the auto air conditioner switch is turned on, it is determined from the temperature control command value in the control device whether the cooling load is high, the cooling load is low, or the heating is performed (step S1). The temperature control command value is a value calculated by a driver's temperature command value, outside air temperature, vehicle interior temperature (suction temperature), solar radiation, and the like, and switching between cooling and heating and switching between air mix dampers are performed according to the values. And the control value such as the fan level. Whether the load is high or low is determined according to the level of the temperature control command value as shown in FIG. 4 (load degree detecting means). Note that the load level detecting means may simply detect and judge the fan level during cooling.

When it is determined that the cooling load is high (step S2), data (solar direction, amount of solar radiation, etc.) from the solar radiation sensor is read (step S3). Thereby, it is determined whether or not there is solar radiation. There are cases where a running vehicle has a side where solar radiation is inserted and a side where solar radiation is not inserted. In such a case, it is desirable to change the degree of air conditioning between the left and right sides. Therefore, the control is performed separately on the side with the sunshine and on the side without the sunshine.

If it is determined that there is solar radiation (step S4), it is next determined whether the vehicle is standing up or stationary (step S5). This determination is made by detecting the time from the start of the engine, the water temperature, and the like.

If it is determined that the time is a rising time (step S6), the pattern (1) shown in FIG. 5 is taken (step S7). That is, the first shutter 21 is fully opened, and the second shutter 25 is fully closed. At the time of start-up, it is considered that the passenger wants a lot of cool air, so that a large amount of cool air a is supplied directly to the passenger from the first outlet 19 as shown in the pattern (1) of FIG.

If it is determined that there is a solar radiation and it is normal (step S8), the pattern (2) shown in FIG. 5 is taken (step S9). That is, both the first shutter 21 and the second shutter 25 are half-open. When the first shutter 21 is opened halfway,
From the first outlet 19, moderate cold air a is supplied to the passenger. When the second shutter 25 is half-opened, a part b of the cool air passes through the ceiling 12 and the guide vanes 27.
a to 27d (in FIG. 5, guide vanes 27a to 2d).
7b is represented by the representative number "27") and supplied from above the passenger. Since the spot-like cold wind is softened and the whole cold wind is obtained, a comfortable cooling state for the passenger can be obtained.

When the solar radiation sensor is read (step 3), if it is determined that there is no solar radiation (step 10), the first shutter 23 is fully closed and the second shutter 25 is fully opened. Pattern (3) is taken (step S11). That is, the cool air in the cooling duct is blown out only from the second blowout port 23.
The cool air blown out from the second blowout port 23 is guided by the guide vanes 27a to 27d (in FIG. 1, the cool air b
_{1, b 2, b 3,} b 4), is supplied from the upper side of passengers only. The cool air is not supplied in a spot manner, but is supplied so as to enclose the passengers over a wide space, so that a cooling state that is comfortable for the passengers is achieved. In FIG. 1, c ₁ , c ₂ , c
₃ shows the flow of cold air. Such control of "no insolation" is performed on the side without insolation when there is a side with insolation and on the side without, but when the vehicle itself is not receiving insolation, it is controlled on both sides. Will be controlled in the same manner.

When it is determined that the load is low in the cooling state (step S12), a pattern (4) is taken (step S13). That is, the first shutter 23 is fully closed, and the second shutter 25 is fully opened. The cool air in the cooling duct is blown out only from the second blowout port 23, and the cool air b blown out from the second blowout port 23 is guided by the guide vanes 27a to 27d and is supplied only from above the passenger. . Since the cool air is supplied over a wide space, the air condition is comfortable for the passengers.
This state is the same as the pattern (3), but at this time, the temperature of the cool air itself supplied to the cooling duct is adjusted to be higher by the air conditioner control device. At this time, it is also possible to control the opening amount of the second shutter 25 to be half-open to reduce the blowing amount.

When the automatic air conditioner control device determines that heating is performed based on the temperature control command value (step S14),
The pattern (5) is taken (step S15), the first shutter 19 is fully closed, and the second shutter 25 is fully opened. The warm air d is supplied from the heating duct 18 obliquely below the seat, while the cool air a is blown from the second outlet 23. In other words, during heating, a state of head cold foot heat that is comfortable for the passenger is formed.

Although the above embodiment is an example in which control is performed separately on the left and right sides of the vehicle, control may be performed independently for each seat. When the individual control is employed as described above, the individual control has priority over the overall control. Each seat is equipped with a control panel for individual control.

[0031]

According to the first aspect of the present invention, the first outlet is provided at the bottom of the cooling duct provided on the right and left sides of the ceiling of the vehicle, and the first outlet is provided. Can be opened and closed by a first shutter, and a second outlet opening in the vehicle width direction is provided on a side surface of the cooling duct, and the second outlet can be opened and closed by a second shutter. On the other hand, the air conditioner is equipped with a load degree detecting means for detecting a load degree of a cooling device for supplying cool air to the cooling duct, a solar radiation sensor for detecting a direction of solar radiation to the vehicle, and a control means for air conditioning. The means is controlled so that the first and second shutters of the cooling duct on the side where the solar radiation is detected by the solar radiation sensor are high load and the solar radiation sensor is not detected, and the cooling duct on the side where the solar radiation is not detected is , Because only two of the shutter is controlled so as to be opened, the day the first on the side which is hit by the spot to cold air supplied from the second outlet,
A strong cooling state can be obtained, and on the side where the sun is not shining, the cooling air is supplied only from the second outlet, so that the cooling is performed entirely from above and the comfort is improved.

According to the invention of claim 2 of the present application, the guide for diverting the air distribution from the second outlet into the vehicle ceiling in the vehicle width direction and diverting the air distribution toward the occupant is provided. Is provided, the cool air blown out in the vehicle width direction is diverted and guided by the guide, so that the temperature around the occupant is uniform, and the cooling is not spot-like and the comfort is improved.

[Brief description of the drawings]

FIG. 1 is a partial schematic diagram of a vehicle air conditioner according to one embodiment.

FIG. 2 is a cross-sectional view of the cooling duct in FIG.

FIG. 3 is an external view of a guide vane.

FIG. 4 is a diagram showing a load state in the air conditioner.

FIG. 5 is a control pattern diagram of air distribution.

FIG. 6 is a flowchart illustrating an example of control by a control unit.

FIG. 7 is a schematic view of an example of a conventional vehicle air conditioner.

[Explanation of symbols]

 13 cooling duct 14 seat 19 first outlet 21 first shutter 22 drive motor 23 second outlet 25 second shutter 26 drive motor 27a to 27d guide vane

Claims (2)

[Claims] A first outlet disposed on the left and right sides of the vehicle ceiling, extending in the front-rear direction, and opening substantially downward at a bottom of a cooling duct through which cool air from the cooling device is sent; A first shutter provided at the outlet of the first air conditioner and capable of opening and closing the outlet, a second air outlet opening in the vehicle width direction on the upper side surface of the cooling duct, A second shutter that is provided at the outlet of the airbag, and that opens and closes the outlet, a driving unit that opens and closes the first and second shutters, a solar sensor that detects the direction of solar radiation, Load level detecting means for determining the load level of the apparatus; and control means for controlling the driving of the driving means in accordance with the output of the load level detecting means and the output of the solar radiation sensor. Is highly negative The driving means is controlled such that the first and second shutters of the cooling duct on the side where the solar radiation is detected by the load and the solar radiation sensor are respectively opened, and the cooling duct on the side where the solar radiation is not detected is the second cooling duct. A driving unit is controlled so that only the shutter is opened. 2. A vehicle air conditioner, wherein a guide for diverting air distribution from the second outlet into a plurality of parts in a vehicle width direction and diverting the air distribution toward an occupant is provided on the vehicle ceiling part. apparatus.