JPH1086631A - Air conditioner for bus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a bus capable of keeping excellent condition in a cabin and inexpensive. SOLUTION: A first air inlet 14a to be communicated with the inside of cabin side and a second air inlet 14b to be communicated with the outside of cabin are formed in a first blower unit 13a and a second blower unit 13b arranged on a bus ceiling, and dampers 16a, 16b, actuators 17a, 17b, and a controller 24 capable of opening/closing either of the air inlets are provided. First and second temperature sensors 18a, 18b are arranged on right and left sides in the cabin, the first and second actuators 17a, 17b are set to switch the first and second dampers 16a, 16b in the first mode where the first air inlet 14a is opened and the second air inlet 14b is closed, or the second mode where the first air inlet 14a is closed and the second air inlet 14b is opened. The controller 24 controls to alternatively switch the first and second modes when the difference in temperatures to be detected by the first and second temperature sensors 18a, 18b exceeds the prescribed value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus air conditioner having a pair of blower units on the left and right sides of a bus ceiling.

[0002]

2. Description of the Related Art Conventionally, a bus is provided with an air conditioner, and air taken in from inside or outside of the vehicle from blower units disposed on the left and right sides of the ceiling of the bus is used to control the temperature and humidity by the air conditioning means. It is known that the air is blown out from a plurality of air vents provided in the passenger seat of a bus after the adjustment of the air conditioner. The air conditioning control in this air conditioner controls the air taken in by the blower unit from the vehicle interior and the exterior of the vehicle in order to prevent the cooling performance from lowering or to ventilate the air in the vehicle interior. Particularly in recent years, the ventilation of the air in the cabin has often been dependent on the ventilation capacity of the air conditioner due to the improvement of the airtightness of the cabin, and the ventilation by the blower unit has been regarded as important with the increase of the cooling capacity. In order to remove odors caused by cigarettes, alcohol, and body odor of passengers, it has become important to appropriately take in air from inside and outside the vehicle.

As shown in FIG. 4, the introduction of inside air and outside air in a conventional air conditioner is performed by first air inlets 3a, 3a communicating with the left side of the ceiling of the bus and the blower units 2a, 2b arranged in the vehicle interior. Second air intake 3 communicating with the outside of the cabin
b, 3b are formed, and the first or second air intake 3
a, a damper 4 formed to be able to open and close any of the
4 and actuators 6, 6 for driving the dampers 4, 4
Are performed by controlling the actuators 6 and 6 by the controller 7. Servo motors are usually used for the actuators 6 and 6,
It is possible to select any one of three modes of outside air introduction and inside and outside air introduction.

In the case of introducing inside air, each motor 6,
6 rotates the respective dampers 4 and 4,
As shown by the solid line in the figure, this is performed by opening the first air intakes 3a, 3a and closing the second air intakes 3b, 3b. The air intakes 3a, 3b are closed and the second air intake 3b,
This is done by opening 3b. When the inside air and the outside air are simultaneously introduced to introduce the inside air and the outside air, the respective motors 6, 6 connect the respective dampers 4a, 4b to the first air inlets 3a, 3a and the second air intake, as shown by the dashed line in the figure. This is performed by positioning the inlets 3b, 3b at intermediate positions where they are opened, and the introduction ratio of the inside air and the outside air can be changed depending on the position angle. The position change can be controlled by the controller 7 so that the air-conditioning state in the vicinity of the customer seat can be changed to a desired state while appropriately maintaining the air-conditioning of the customer seat.

[0005]

However, in the conventional bus air conditioner, the dampers 4 and 4 are connected to the first air inlet 3.
a, 3a and the second air inlets 3b, 3b need to be located at intermediate positions to be opened, respectively. Therefore, since the servo motors are used for the actuators 6, 6, the servo motors are very expensive. Since an amplifier for driving the servomotor is also required at the same time, there is a problem that the unit price of the air conditioner is increased. An object of the present invention is to provide an inexpensive bus air conditioner that maintains a favorable condition in a vehicle cabin when introducing inside and outside air.

[0006]

The invention according to claim 1 is
As shown in FIG. 1, a first blower unit 13a and a second blower unit 13b for blowing air into the vehicle interior are disposed on the left side and the right side of the ceiling of the bus 10, and the interior of the vehicle is provided in both the blower units 13a and 13b. 1st air inlet 1 communicating with
4a, 14a and the 2nd air intake 14 which communicates outside a vehicle interior
b and 14b, respectively, and a first damper 16a formed on the first blower unit 13a so as to open or close either the first or second air inlet 14a or 14b, and a first actuator 17a for driving the damper 16a. A second damper 16b formed in the second blower unit 13b so as to open or close either the first or second air intake 14a, 14b and a second damper 16 for driving the second damper 16b.
This is an improvement of a bus air conditioner provided with an actuator 17b and a controller 24 for controlling the first and second actuators 17a and 17b to drive the first and second dampers 16a and 16b.

[0007] The characteristic configuration is that a first temperature sensor 18a and a second temperature sensor 18a are provided on the left and right sides of the vehicle interior.
b, and the first and second actuators 17a, 17a, 1
7b opens the first and second dampers 16a, 16b through the first air inlets 14a, 14a and opens the second air inlets 14b, 1b.
4b for closing the first mode or the first air intake 14a,
The controller 24 is set so as to be switched to one of a second mode in which the first air sensor 14a is closed and the second air intake ports 14b, 14b are opened, and the controller 24 controls the first and second temperature sensors 18a, 18
The first and second actuators 17a and 17b are controlled so that the first mode and the second mode are alternately switched when the difference between the temperatures detected by b is equal to or greater than a predetermined value.

In the bus air conditioner constructed as described above, by setting the actuator operation in two modes, it is not necessary to use an expensive servo motor or the like, and an inexpensive electromagnetic solenoid or a pneumatic or hydraulic cylinder is used. Enables the use of actuators. The controller 24 controls the first and second dampers 16a and 16b to alternately switch between the first mode and the second mode.
By controlling the actuators 17a and 17b, air inside and outside the vehicle compartment is alternately taken in, and when the difference between the temperatures detected by the first and second temperature sensors 18a and 18b is equal to or greater than a predetermined value, the first mode and the second mode The temperature distribution in the vehicle cabin is made uniform by controlling so that the temperature is alternately switched.

According to a second aspect of the present invention, as shown in FIG. 3, a first blower unit 13a and a second blower unit 13b for blowing air into a vehicle cabin are provided on the left and right sides of the ceiling of the bus 10. And both blower units 13a, 13
b, a first air inlet 14a, 14a communicating with the interior of the vehicle and a second air inlet 14b, 14b communicating with the exterior of the vehicle, respectively, are formed, and the first or second air inlet 14a is formed in the first blower unit 13a. , 14b, and a first actuator 17a for driving the damper 16a. The first or second air inlets 14a, 14b are provided in the second blower unit 13b.
And a second actuator 1 for driving the second damper 16b.
7b and the first and second actuators 17
a, 17b to control the first and second dampers 16a, 16a.
This is an improvement of a bus air conditioner provided with a controller 24 for driving b.

The characteristic configuration is that the controller 24 has a timer 24a, and the first and second actuators 17
a, 17b connect the first and second dampers 16a, 16b to the first
The air inlets 14a, 14a are opened and the second air inlet 14 is opened.
1st mode or 1st air intake 1 which closes b and 14b
4a, 14a is closed and the second air inlets 14b, 14b are set to be switched to one of the second modes, and the controller 24 switches between the first mode and the second mode every time the set time of the timer 24a elapses. The first and second actuators 17a and 17b are controlled so as to alternately switch between. In the bus air conditioner thus configured, the controller 24 controls the first and second actuators 17a and 17b so that the first mode and the second mode are alternately switched every time the set time of the timer 24a elapses. This eliminates the need for a device such as a temperature sensor, simplifies the control of the first and second actuators 17a and 17b of the controller 24, and further reduces the cost of the air conditioner.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG.
The first that blows cold air into the cabin on the left and right sides of the ceiling
A cooling unit 11a and a second cooling unit 11b are provided, and a pair of first and second blowouts provided above the side windows of the passenger compartment are provided continuously with the first and second cooling units 11a and 11b. Ducts 12a, 1
2b is provided extending in the vehicle traveling direction. As shown in FIG. 1, air inside or outside the vehicle compartment is taken into the cooling units 11a, 11b into the cooling units 11a, 11b, respectively.
a and 12b to send to the first and second blower units 13a,
An evaporator 13b and an unillustrated evaporator are provided, and the evaporator cools the air blown into the vehicle compartment by evaporating the liquefied refrigerant. The air cooled by the evaporator is supplied to the first and second blower units 13a and 13b by the first and second blower ducts 12a and 12b.
Are provided, respectively. The cool air blown from the first and second cooling units 11a and 11b by the blowers 15a and 15b is supplied to the first and second cooling units.
The duct outlets 12c, 12d are guided by the outlet ducts 12a, 12b and directed to each seat at a predetermined interval.
From the vehicle interior. Note that manual air dampers 12e and 12f are provided at the air outlets 12c and 12d, respectively, so that the blowing amount can be adjusted according to passenger's preference.

The first air inlets 14a, 14a communicating with the vehicle interior are connected to the air inlets of the blower units 13a, 13b.
And second air intakes 14b, 14b communicating with the outside of the vehicle compartment. Second air intakes 14b, 14b
Is a hole formed through the ceiling of the bus 10 and communicating with the outside. The roof panel of the bus 10 is provided with outdoor covers 10a and 10a for preventing rainwater from entering. The first blower unit 13a has a first damper 16a formed to be able to open and close either the first or second air intake 14a, 14b, and a first damper 16a for driving the damper 16a.
An actuator 17a is provided. The second blower unit 13b has first or second air intakes 14a, 14b.
Damper 16b formed to be able to open or close any one of
And a second actuator 1 for driving the damper 16b.
7b. The first and second actuators 17a and 17b in the present embodiment are rotary solenoids, respectively, and the first and second dampers 16a and 1
6b is rotatably driven, and the first and second actuators 17a and 17b are connected to the first and second dampers 16a and 16a.
6b is a first mode in which the first air intakes 14a, 14a are opened and the second air intakes 14b, 14b are closed, or the first air intakes 14a, 14a are closed and the second air intake 14 is closed.
It is set so as to switch to one of the second modes in which b and 14b are opened.

Temperature sensors 18a, 1 for detecting the air temperature in the passenger compartment of the bus are provided on the first and second outlet ducts 12a, 12b.
8b are provided, and a switch for an air conditioner is provided in the driver's seat. The switch includes a main switch (not shown) of the air conditioner itself and a blower unit 13a, 1
3b is an inside air switch 2 for taking in air from the vehicle interior
1 and an outside air switch 2 for taking in air from outside the cabin
2, and an inside / outside air switch 23 for taking in air from both inside and outside the vehicle. The above sensors 18a, 1
8b and the outputs of the switches 21 to 23 are connected to the controller 2
4 and a control output of the controller 24 via a drive circuit (not shown) to the first and second actuators 17a and 17b and the blowers 15a and 15b.
15b.

The operation of the bus air conditioner thus configured will be described. When it is hot and humid during the operation of the bus 10, the driver turns on a main switch (not shown) of the air conditioner to operate the blowers 15a and 15b, and changes the air taken in by the respective blower units 13a and 13b from the air conditioning state of the passenger seat into the vehicle interior. Alternatively, select from outside the vehicle compartment or both. Here, a switch 21 for taking in air from the vehicle interior
Is selected, the controller 24 drives the first and second actuators 17a and 17b to rotate the first and second dampers 16a and 16b to the positions shown by solid lines in FIG. 2nd air intake 14 to take in
b and 14b are respectively set to the first mode in which they are closed. When the switch 22 for taking in air from outside the vehicle compartment is selected, the controller 24 drives the first and second actuators 17a and 17b to operate the first and second dampers 1 and 17b.
The first air intakes 14a, 14a for rotating air 6a, 16b to the position shown by the broken line in FIG.
Are set to the second mode in which each is closed.

[0015] When it is selected to take in air from both the inside and outside of the vehicle, the controller 24 controls the first.
The first actuator 17a of the blower unit 13a is driven to rotate the first damper 16a to a position shown by a solid line,
In the first mode in which the second air intake 14b is closed,
By driving the second actuator 17b of the blower unit 13b to rotate the second damper 16b to the position shown by the broken line,
A second mode is set in which the first air inlet 14a for taking in air from the vehicle interior is closed. As a result, the air in the passenger compartment is taken in from the first blower unit 13a, and the outside air is taken in from the second blower unit 13b, and these airs are mixed in the passenger compartment and consequently from both the passenger compartment and the outside of the passenger compartment. Air will be taken in. The air thus taken in is blown into the vehicle interior after being air-conditioned by an evaporator (not shown).

Next, the first and second temperature sensors 18a, 18
When the difference between the temperatures detected by b reaches a predetermined value or more, the controller 24 controls the first and second actuators so as to alternately switch between the first mode and the second mode. That is,
When the temperature difference exceeds a predetermined value, the controller 24
Is the first actuator 17 of the first blower unit 13a
is driven to rotate the first damper 16a to the position shown by the broken line to set the second mode in which the first air intake 14b is closed, and the second actuator 1 of the second blower unit 13b
7b to rotate the second damper 16b to the position shown by the solid line, and to take in air from outside the vehicle cabin.
4a is set to the first mode for closing. As a result, air in the vehicle compartment is taken in from the second blower unit 13a, and outside air is taken in from the first blower unit 13b, and these airs are mixed in the vehicle compartment.

FIG. 3 shows another embodiment of the present invention. In the drawings, the same reference numerals as those of the above-described embodiment denote the same components, and a repeated description will be omitted. A characteristic configuration of the present embodiment is that a timer 24a is provided in the controller 24, and the controller 24 switches the first and second dampers 16a and 16b between the first mode and the second mode every time the timer 24a elapses.
The first and second actuators 17a and 17b are controlled so that the mode and the mode are alternately switched. That is,
The controller 24 operates the first blower unit 1 every predetermined time.
The configuration is such that air outside the vehicle compartment is alternately taken in from both the 3a and the second blower unit 13b.

In the bus air conditioner thus constructed, the controller 24 drives the first actuator 17a of the first blower unit 13a to rotate the first damper 16a to the position shown by the solid line, and the second air inlet The first air inlet 14a for taking in air from the passenger compartment by driving the second actuator 17b of the second blower unit 13b to rotate the second damper 16b to the position shown by the broken line by setting the first mode to close the first mode 14b. Is set to the second mode of closing.
Thereafter, the controller 24 controls the first and second actuators 17a and 17b so that the first mode and the second mode are alternately switched every predetermined time. The other operations are the same as those of the above-described embodiment, and thus the description thereof will not be repeated.

[0019]

As described above, according to the present invention, the temperature sensor is disposed in the vehicle interior, and the actuator opens the first air inlet or the second mode in which the damper opens the first air inlet. Since the mode is set to be switched to any one of the second modes, it is not necessary to use an expensive servo motor or the like, and it is possible to use an inexpensive actuator such as an electromagnetic solenoid or a pneumatic or hydraulic cylinder. Further, since the controller controls the actuator so that the first mode and the second mode are alternately switched when the difference between the temperatures detected by the temperature sensors is equal to or more than a predetermined value, the temperature distribution in the vehicle compartment can be made uniform. it can. As a result, it is possible to obtain an inexpensive bus air conditioner that maintains a favorable condition in the cabin when introducing inside and outside air. If the controller is provided with a timer, and the controller is configured to control the first and second actuators so as to alternately switch between the first mode and the second mode each time the set time of the timer elapses, the temperature sensor And the like can be further eliminated, the control of the first and second actuators by the controller can be simplified, and the cost of the air conditioner can be further reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a bus air conditioner of the present invention.

FIG. 2 is a perspective view of a main part of a bus including the air conditioner.

FIG. 3 is a view corresponding to FIG. 1 and showing another example of the present invention.

FIG. 4 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

 10 Bus 13a 1st blower unit 13b 2nd blower unit 14a 1st air intake 14b 2nd air intake 16a 1st damper 16b 2nd damper 17a 1st actuator 17b 2nd actuator 18a 1st temperature sensor 18b 2nd temperature sensor 24 Controller 24a Timer

Claims (2)

[Claims] 1. A first blower unit (13a) for blowing air into a vehicle interior at a left side and a right side of a ceiling of a bus (10) and a second blower unit.
A blower unit (13b) is provided, and a first air inlet (14a, 14b) communicating with the two blower units (13a, 13b) in the vehicle interior.
a) and second air intakes (14b, 14b) communicating with the outside of the vehicle cabin, respectively, and the first blower unit (13a) is provided with one of the first and second air intakes (14a, 14b). A first damper (16a) formed so as to be able to open and close and a first actuator (17a) for driving the damper (16a) are provided, and the first or second air intake is provided to the second blower unit (13b). entrance
(14a, 14b), a second damper (16b) formed to be openable and closable, and a second actuator (17b) for driving the second damper (16b) are provided, and the first and second actuators are provided. (17a, 17b) to control the first and second dampers (16
a, 16b) a bus air conditioner provided with a controller (24), wherein a first temperature sensor (18a) and a second temperature sensor (18b) are disposed on the left side and the right side in the vehicle interior, The first and second actuators (17a, 17b) are connected to the first
And the second damper (16a, 16b) is connected to the first air inlet (14a, 14b).
a) is opened and the second air intake (14b, 14b) is closed in the first mode or the first air intake (14a, 14a) is closed and the second air intake (14b, 14b) is opened The controller (24) is set so as to switch to one of the first and second temperature sensors (1) and (2).
8a, 18b) controlling the first and second actuators (17a, 17b) so as to alternately switch between the first mode and the second mode when the difference between the temperatures detected by the sensors is equal to or more than a predetermined value. Bus air conditioner characterized by the following. 2. A first blower unit (13a) for blowing air into a vehicle cabin at a left side portion and a right side portion of a ceiling of a bus (10) and a second blower unit.
A blower unit (13b) is provided, and a first air inlet (14a, 14b) communicating with the two blower units (13a, 13b) in the vehicle interior.
a) and second air intakes (14b, 14b) communicating with the outside of the vehicle cabin, respectively, and the first blower unit (13a) is provided with one of the first and second air intakes (14a, 14b). A first damper (16a) formed so as to be able to open and close and a first actuator (17a) for driving the damper (16a) are provided, and the first or second air intake is provided to the second blower unit (13b). entrance
(14a, 14b), a second damper (16b) formed to be openable and closable, and a second actuator (17b) for driving the second damper (16b) are provided, and the first and second actuators are provided. (17a, 17b) to control the first and second dampers (16
a, 16b), a bus air conditioner provided with a controller (24), wherein the controller (24) has a timer (24a), and the first and second actuators (17a, 17b) are 1
And the second damper (16a, 16b) is connected to the first air inlet (14a, 14b).
a) is opened and the second air intake (14b, 14b) is closed in the first mode or the first air intake (14a, 14a) is closed and the second air intake (14b, 14b) is opened The controller (24) switches between the first mode and the second mode every time the set time of the timer (24a) elapses. First and second actuators (17a, 17b)
A bus air conditioner characterized by controlling the following.