JP3452169B2 - Bus air conditioner - Google Patents

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 the ceiling of a bus.

[0002]

2. Description of the Related Art Conventionally, an air conditioner is installed in a bus, and air taken in from inside or outside the vehicle from blower units arranged on the left side and the right side of the ceiling of the bus is controlled by the air conditioning means. It is known that air is blown out from a plurality of air outlets arranged in the passenger seats of a bus after adjusting the above. The air conditioning control in this air conditioner appropriately controls the air taken in by the blower unit from the inside and outside of the vehicle in order to prevent the cooling capacity from deteriorating or to ventilate the air in the vehicle. Especially in recent years, as the air-tightness of the passenger compartment has become more dependent on the ventilation capacity of the air conditioner, the ventilation by the blower unit has become more important as the cooling capacity increases. It has become important to properly take in air from inside and outside the vehicle in order to remove the smell of cigarettes, alcohol, and body odor of passengers.

As shown in FIG. 4, the introduction of the inside air and the outside air in the conventional air conditioner is such that the first air intake ports 3a, 3a communicating with the left side of the ceiling of the bus and the installed blower units 2a, 2b in the passenger compartment. Second air intake 3 that communicates with the outside of the vehicle
b, 3b are formed, and the first or second air intake 3
The damper 4, which is formed so as to be able to open and close either a or 3b
4 and the actuators 6, 6 for driving the dampers 4, 4
Are provided, and this is performed by the controller 7 controlling the actuators 6 and 6. Servomotors are usually used for the actuators 6 and 6 to introduce internal air,
It is possible to select one of the three modes of outside air introduction and inside / outside air introduction.

In the case of introducing the inside air, each motor 6,
6 rotates each damper 4, 4,
As shown by the solid line in the figure, it is performed by opening the first air intake ports 3a, 3a and closing the second air intake ports 3b, 3b. The air intakes 3a, 3b are closed to close the second air intakes 3b,
This is done by opening 3b. Further, when introducing the inside air and the outside air that simultaneously take in the inside air and the outside air, the respective motors 6 and 6 connect the respective dampers 4a and 4b to the first air intake ports 3a and 3a and the second air intake port as shown by the chain line in the figure. This is performed by arranging the inlets 3b and 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 angle of the position. This position change can be controlled by the controller 7 so that the air conditioning state near the passenger seat can be set to a desired state while the air conditioning of the passenger seat is appropriately maintained.

[0005]

However, in the above conventional air conditioner for a bus, the dampers 4 and 4 are connected to the first air intake port 3.
Since the servo motors are used for the actuators 6 and 6 because it is necessary to position a, 3a and the second air intake ports 3b, 3b at intermediate positions for opening, respectively, the servo motors are very expensive. Since an amplifier for driving the servo motor is also required at the same time, the unit price of the air conditioner is raised. An object of the present invention is to provide an inexpensive air conditioner for a bus that keeps the condition inside the vehicle in good condition when introducing the 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 compartment are arranged on the left and right sides of the ceiling of the bus 10, and both the blower units 13a and 13b are provided in the vehicle compartment. First air intake 1 communicating with
Second air intake 14 communicating with 4a, 14a and the outside of the vehicle
b and 14b, respectively, and a first damper 16a formed to open and close either the first or second air inlets 14a and 14b in the first blower unit 13a and a first actuator 17a for driving the damper 16a. And a second damper 16b which is formed in the second blower unit 13b so as to be capable of opening and closing either the first or second air intake ports 14a, 14b, and a second damper 16b for driving the second damper 16b.
It is an improvement of a bus air conditioner provided with an actuator 17b and a controller 24 that drives the first and second dampers 16a and 16b by controlling the first and second actuators 17a and 17b.

The characteristic configuration is that the first temperature sensor 18a and the second temperature sensor 18 are provided on the left and right sides in the vehicle compartment.
b is provided, and the first and second actuators 17a, 1
7b opens the first and second dampers 16a, 16b to open the first air intake ports 14a, 14a and opens the second air intake ports 14b, 1
A first mode for closing 4b or a first air intake 14a,
It is set to switch to either of the second modes in which 14a is closed and the second air inlets 14b and 14b are opened, and the difference between the temperatures detected by the first and second temperature sensors 18a and 18b is a predetermined value or more. When the controller 24 is the first damper 1
So that 6a alternates between the first mode and the second mode
To control the first actuator 17a to control the second damper 16b.
Is different from the first damper 16a in the second mode and the first mode.
The second actuator 1 so that the mode and the mode are alternately switched.
It is about to control 7b .

In the bus air conditioner thus constructed, the use of an expensive servo motor or the like is unnecessary by setting the actuator operation in two modes, and an inexpensive electromagnetic solenoid or an air pressure or hydraulic cylinder or the like is used. Allows the use of actuators. The controller 24 controls the first and second dampers 16a and 16b so as to alternately switch between the first mode and the second mode.
By controlling the actuators 17a and 17b, the air inside and outside the cabin is alternately taken in, and when the difference between the temperatures detected by the first and second temperature sensors 18a and 18b is a predetermined value or more, the first mode and the second mode. The temperature distribution in the vehicle compartment is made uniform by controlling so as to alternate between and.

According to the second aspect of the invention, as shown in FIG. 3, a first blower unit 13a and a second blower unit 13b for blowing air into the passenger compartment are provided on the left and right sides of the ceiling of the bus 10. Both blower units 13a, 13
b is formed with first air inlets 14a, 14a communicating with the interior of the vehicle and second air inlets 14b, 14b communicating with the outside of the vehicle, and the first blower unit 13a is provided with the first or second air inlet 14a. , 14b is provided so as to be capable of opening and closing either the first or second air blower unit 13b, and a first actuator 17a for driving the damper 16a is provided.
A second damper 16b formed to be capable of opening and closing any one of them, and a second actuator 1 for driving the second damper 16b.
7b and the first and second actuators 17 are provided.
a and 17b to control the first and second dampers 16a and 16
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 are provided.
a, 17b makes the first and second dampers 16a, 16b the first
The second air intake port 14 is opened by opening the air intake ports 14a, 14a.
b, 14b closed first mode or first air intake 1
4a and 14a are closed and the second air inlets 14b and 14b are opened to be switched to any 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 be switched alternately. In the bus air conditioner thus configured, the controller 24 controls the first and second actuators 17a and 17b so as to alternately switch between the first mode and the second mode each time the set time of the timer 24a elapses. As a result, a device such as a temperature sensor is not required, the control of the first and second actuators 17a and 17b of the controller 24 can be simplified, and the cost of the air conditioner can be further reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG.
First, blows cold air into the passenger compartment on the left and right side of the ceiling
A cooling unit 11a and a second cooling unit 11b are provided, and a pair of first and second blowouts provided continuously to the first and second cooling units 11a and 11b above the side window of the vehicle compartment. Duct 12a, 1
2b is provided so as to extend in the vehicle traveling direction. As shown in FIG. 1, inside the cooling units 11a and 11b, the air inside or outside the passenger compartment is taken into the cooling units 11a and 11b, and the first and second outlet ducts 12 are introduced.
a and 12b, the first and second blower units 13a,
13b and an evaporator (not shown) are provided, and the evaporator cools the air blown into the vehicle compartment by vaporizing the liquefied refrigerant. Air cooled by the evaporator is supplied to the first and second blower units 13a and 13b by the first and second blow ducts 12a and 12b.
Blowers 15a and 15b for sending to the respective units are provided. The cold air blown out from the first and second cooling units 11a and 11b by the blowers 15a and 15b is the first and second cooling air.
The duct outlets 12c and 12d guided by the outlet ducts 12a and 12b and directed to the respective seats at predetermined intervals.
It is supposed to be blown out into the passenger compartment. The blower outlets 12c and 12d are provided with manual dampers 12e and 12f, so that the blowing amount can be adjusted according to the passenger's preference.

The air inlets of the blower units 13a and 13b have first air inlets 14a and 14a communicating with the interior of the vehicle.
And second air intakes 14b, 14b that communicate with the outside of the vehicle. 2nd air intake 14b, 14b
Is a hole penetrating the ceiling of the bus 10 and communicating with the outside, and 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 open and close either the first or second air intake ports 14a and 14b, and a first damper 16a for driving the damper 16a.
An actuator 17a is provided. The second blower unit 13b has a first or second air intake port 14a, 14b.
Second damper 16b formed to be able to open or close any of
And the second actuator 1 that drives this damper 16b
7b are provided. The first and second actuators 17a and 17b in this embodiment are rotary solenoids, respectively, and each of the first and second dampers 16a and 1
6b is configured to be rotationally driven, and the first and second actuators 17a and 17b include the first and second dampers 16a and 1a.
6b is a first mode in which the first air intake ports 14a, 14a are opened and the second air intake ports 14b, 14b are closed, or the first air intake ports 14a, 14a are closed and the second air intake port 14 is closed.
It is set to switch to either of the second modes in which b and 14b are opened.

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

The operation of the bus air conditioner thus configured will be described. When the bus 10 is hot and humid, the driver turns on the main switch (not shown) of the air conditioner to operate the blowers 15a and 15b, and the air taken in by the respective blower units 13a and 13b from the air-conditioned state of the passenger seats is taken into the passenger compartment. Or, select from outside the vehicle or both. Switch 21 that takes in air from the passenger compartment
When 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 the solid lines in FIG. Second air intake 14 for taking in
The first mode in which b and 14b are closed is set. When the switch 22 that takes in air from the outside of the vehicle compartment is selected, the controller 24 drives the first and second actuators 17a and 17b to drive the first and second dampers 1.
The first air intake ports 14a, 14a for rotating the 6a, 16b to the positions shown by the broken lines in FIG.
To the second mode to close each.

If it is selected to take in air from both inside and outside the vehicle, the controller 24 will
Drive the first actuator 17a of the blower unit 13a to rotate the first damper 16a to the position shown by the 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,
The second mode in which the first air intake port 14a for taking in air from the vehicle interior is closed is set. As a result, the air inside the vehicle 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 air are mixed in the vehicle compartment, resulting in both inside and outside the vehicle compartment. Air will be taken in. The air thus taken in is blown out 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 or exceeds a predetermined value, 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.
a to rotate the first damper 16a to the position shown by the broken line to enter the second mode in which the first air intake port 14b is closed, and the second actuator 1 of the second blower unit 13b is operated.
The second air intake 1 for taking in air from outside the vehicle by driving 7b to rotate the second damper 16b to the position shown by the solid line.
The first mode is to close 4a. As a result, the air inside the vehicle compartment is taken in from the second blower unit 13a and the outside air is taken in from the first blower unit 13b, and these air are mixed in the vehicle compartment.

FIG. 3 shows another embodiment of the present invention. In the figure, the same reference numerals as those used in the above-described embodiment denote the same parts, and the repeated description will be omitted. In the characteristic configuration of the present embodiment, the controller 24 is provided with the timer 24a, and the controller 24 causes the first and second dampers 16a and 16b to operate in the first mode and the second mode each time the timer 24a is set.
The first and second actuators 17a and 17b are controlled so that the modes are switched alternately. That is,
The controller 24 sets the first blower unit 1 at predetermined intervals.
3a and the second blower unit 13b are alternately arranged to take in air outside the vehicle compartment.

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 intake port. The first air intake port 14a for taking in air from the vehicle interior is set to the first mode in which 14b is closed, and the second actuator 17b of the second blower unit 13b is driven to rotate the second damper 16b to the position shown by the broken line. To the second mode to close.
Thereafter, the controller 24 controls the first and second actuators 17a and 17b so as to alternately switch between the first mode and the second mode each time a predetermined time elapses. The other operations are the same as those in the above-described embodiment, and thus the repeated description will be omitted.

[0019]

As described above, according to the present invention, the temperature sensor is arranged in the passenger compartment, and the actuator opens the first air intake opening in the damper or the first mode or the second air intake opening. Since it is set to switch to any 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 electromagnetic solenoid or an actuator such as a pneumatic or hydraulic cylinder. Further, the controller controls the actuator so as to switch between the first mode and the second mode alternately when the difference in temperature detected by the temperature sensor is equal to or more than a predetermined value, so that the temperature distribution in the vehicle compartment can be made uniform. it can. As a result, it is possible to obtain an inexpensive air conditioner for a bus that keeps the condition in the passenger compartment good when introducing the outside air. Further, if the controller is provided with a timer and the controller is configured to control the first and second actuators so that the first mode and the second mode are alternately switched each time the set time of the timer elapses, the temperature sensor It is possible to further eliminate the need for such devices, simplify the control of the first and second actuators by the controller, and further reduce the cost of the air conditioner.

[Brief description of 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 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 First air intake 14b Second air intake 16a First damper 16b Second damper 17a First actuator 17b Second actuator 18a First temperature sensor 18b Second temperature sensor 24 controller 24a timer

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60H 1/00-3/06

Claims (2)

(57) [Claims] 1. A first blower unit (13a) and a second blower unit (13a) for blowing air into a passenger compartment on a left side portion and a right side portion of a ceiling of a bus (10).
A blower unit (13b) is provided, and the first air intake ports (14a, 14a) communicating with the both blower units (13a, 13b) in the vehicle interior are provided.
a) and second air inlets (14b, 14b) communicating with the outside of the vehicle are formed, and either the first or second air inlets (14a, 14b) are formed in the first blower unit (13a). And a first actuator (17a) for driving the damper (16a). The first blower unit (13b) is provided with a first damper (16a) formed to be openable and closable. entrance
A second damper (16b) formed to be able to open and close any one of (14a, 14b) 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
In a bus air conditioner provided with a controller (24) for driving a, 16b), a first temperature sensor (18a) and a second temperature sensor (18b) are arranged on the left side and the right side inside the vehicle, The first and second actuators (17a, 17b) are the first
And the second damper (16a, 16b) to the first air intake (14a, 14
a) to open the second air inlet (14b, 14b) in the first mode or to close the first air inlet (14a, 14a) and open the second air inlet (14b, 14b) When the difference between the temperatures detected by the first and second temperature sensors (18a, 18b) is equal to or greater than a predetermined value, the controller (24) causes the controller (24) to operate in the second mode .
1 damper (16a) switches between the first mode and the second mode.
Switch the first actuator (17a) so as to switch alternately.
The second damper (16b) is controlled to be different from the first damper (16a).
Alternate between the second mode and the first mode
Control the second actuator (17b) to switch to
An air conditioner for a bus characterized by: 2. A first blower unit (13a) and a second blower unit (13a) for blowing air into the passenger compartment on the left and right sides of the ceiling of the bus (10).
A blower unit (13b) is provided, and the first air intake ports (14a, 14a) communicating with the both blower units (13a, 13b) in the vehicle interior are provided.
a) and second air inlets (14b, 14b) communicating with the outside of the vehicle are formed, and either the first or second air inlets (14a, 14b) are formed in the first blower unit (13a). And a first actuator (17a) for driving the damper (16a). The first blower unit (13b) is provided with a first damper (16a) formed to be openable and closable. entrance
A second damper (16b) formed to be able to open and close any one of (14a, 14b) 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
In a bus air conditioner provided with a controller (24) for driving a, 16b), the controller (24) includes a timer (24a), and the first and second actuators (17a, 17b) include the first and second actuators (17a, 17b). 1
And the second damper (16a, 16b) to the first air intake (14a, 14
a) to open the second air inlet (14b, 14b) in the first mode or to close the first air inlet (14a, 14a) and open the second air inlet (14b, 14b) The second mode is set so that 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)
An air conditioner for a bus, which controls the air conditioner.