JPS619323A - Vehicle ventilating device - Google Patents

Abstract

PURPOSE:To appropriately control the amount of ventilation to aim at saving energy and purifying air in the passenger's compartment in a vehicle, by detecting contamination in air inside and outside of the passenger's compartment with the use of inside and outside air sensors to control a member for opening and closing an air inlet port for air outside of the passenger's compartment, a device for introducing air into the passenger's compartment and a device for venting air. CONSTITUTION:When the contamination of air outside of the passenger's compartment, which is detected by an outside air sensor 8, is above a predetermined degree, a first control means 14A delivers its output signal to a drive circuit 15 to close an opening and closing member 9 while when the detected contamination of air outside of the component, is below the predetermined degree, a second control means 14B delivers its output signals for controlling the operations of drive circuits 15 through 17 for the opening and closing member 9, an air introduction member 1 and an air venting member 6 in accordance with the detected contamination. Further, when the selected mode is the Hi mode, an opening and closing member 10 is opened to operate the air introduction member 1 at a large air introducing capacity and as well to operate the air venting member 6. Upon Me mode the opening and closing member 10 is opened to operate the air introduction member 1 at a small air introducing capacity and as well to operate the air venting member 6. Upon Lo mode the member 10 is opened but the devices 1, 6 are rested.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a ventilation system for a vehicle that automatically controls the amount of ventilation according to the degree of pollution of the air inside and outside the vehicle interior, thereby reducing air pollution inside the vehicle interior. Regarding.

[Conventional technology]

A device for switching between intake of air inside the vehicle and air outside the vehicle, which selects the intake of air from outside the vehicle interior, is exemplified in Japanese Patent Publication No. 5'l-20165. This known technique mainly describes selective intake of inside air and outside air.

[Problem that the invention seeks to solve]

In the known technology, there is no explanation of controlling the amount of ventilation by providing an exhaust device for blowing air inside the vehicle to the outside of the vehicle, such as in a bus vehicle, for example.

Therefore, the present invention provides a ventilation control device for a vehicle that is equipped with an air guide device and an air exhaust device, and that appropriately controls the amount of ventilation and has the functions of energy saving and purifying the air inside the vehicle. The purpose is to provide.

[Means for Solving the Problem 1] Therefore, the present invention has the configuration described in the claims 2) to detect dirt in the air outside the vehicle and to open the outside air intake. When the air outside the vehicle is clean and the air inside the vehicle is detected to be contaminated, the air guide device and the exhaust device are activated in stages, thereby reliably preventing the entry of dirty air from outside the vehicle. In addition, when the air inside the vehicle becomes dirty, the amount of air taken in from outside the vehicle and the amount sent out to the outside of the vehicle can be adjusted depending on the degree of contamination. To reduce pollution in the air inside a vehicle by reducing the escape rate as much as possible.

〔Example〕

1 and 2 show the arrangement of the components excluding the electrical circuits. Reference numeral 10 denotes an outside air intake port provided on the side of the bus vehicle, and an opening/closing member 9 is provided on the intake port 10 so as to open and close it by an actuator 9A. Note that the opening/closing member 9 may not be able to completely block the intake of outside air when the opening/closing member 9 is closed. Intake port 10 is ventilation duct 0.
This is one of the open ends on the second flow side, and the ventilation duct O is also provided with an open end that takes in the air inside the vehicle. Intake port 1
Air guide device 1 is provided adjacent to 0. The air guide device 1 is made up of a combination of an electric motor and a fan, and by adjusting the rotational speed of the electric motor 1, the amount of air guided can be adjusted, for example, in steps.

Inside the ventilation duct 1, a cooling heat exchanger 2, a heating heat exchanger 3, and an indoor circulation fan 4, which are known as temperature control units, are arranged. The fan 4 adjusts the amount of air blown by a known electric motor and an air amount adjustment circuit (not shown). The downstream opening end of the ventilation duct O is extended to the ceiling of the vehicle interior, and a ventilation system indicated by several white arrows is formed in the ventilation duct 0.

A natural exhaust port (and/or ventilation port) 5 is provided at an appropriate location that separates the interior of the vehicle from the outside of the vehicle, and an exhaust device that includes an electric sweater and a fan and forcibly sends the air inside the vehicle to the outside of the vehicle. 6 is a provision. The amount of air discharged by this air exhaust device is adjusted according to the rotational speed of the electric motor.

Furthermore, an inside air sensor 7, which may be a known type, is disposed in the vehicle interior to detect dirt in the air inside the vehicle and generate an electric signal according to the dirt. An outside air sensor 8, which may be a known type, is provided to detect dirt on the air and generate an electric signal in accordance with the dirt.

FIG. 3 shows the electrical circuit for ventilation control. Electric signals generated by the inside air sensor 7 and the outside air sensor 8 are applied to the microcomputer 14 via amplifier circuits 11.12 and A/D converter 13, respectively.

The microcomputer 14 processes the data provided from the two sensors according to a ventilation control program stored in advance, and sends an output signal based on the processing result to a drive circuit 15 for the actuator 9A and a drive circuit for the air guide device 1. 16, and a drive circuit 17 for the exhaust device 6. Note that the drive circuit 15 operates as a switch so that the opening/closing member 9 selects a position between an open position and a closed position, and the drive circuit 16 operates, for example, as a switch for selecting the position of the opening/closing member 9 between the open position and the closed position.
The drive circuit 17 operates a switch so that the width of the ventilation device 6 is selected from three levels: large, small, and none. It is something to do.

To briefly explain the control function of the microcomputer 14 using FIG. 3, the drive circuit 15 is configured to close the opening/closing member 9 when the pollution of the air outside the vehicle cabin detected by the outside air sensor 8 exceeds a predetermined level. The first control means 14A that provides an output signal and the open/close operation according to the degree of contamination of the air inside the vehicle detected by the inside air sensor 7 when the degree of contamination of the air outside the vehicle interior detected by the outside air sensor 8 is below a predetermined degree. It includes a second control means 14B that provides output signals to control the respective operations of the drive circuits 15, 16, 17 of the member 9, the air guide member 1, and the air exhaust member 6.

Note that the microcomputer 14 has a data memory that temporarily stores detection data and data used in the calculation process.
(RAM).

A control program for realizing the above control functions of the microcomputer 14 is shown in FIG. The computer 14 executes step 101 when approximately 15 seconds have elapsed since the main switch (not shown) is turned on.

In step 101, the reference value VIMIN of the inside air data and the reference value VOMIN of the outside air data are set to the maximum value FF, which is not normally detected.

In step 102, based on the clock counter processing (not shown),
Branches to average calculation processing 103 to 111 at timings of 250 ms and 750 ms in 1 second, and calculates 0 and 500.
The process branches to control processes 201 to 205 at a timing of ms.

In the average calculation process, in step 103, the average value VOMU is calculated for the outside air data VO input during 4 seconds, and in step 104, the outside air data reference value VOMU is calculated.
Find the difference Δ from N. The difference Δ is determined to be positive or negative in step 105, and if the average value ■C is smaller than the outside air data standard value ■OMIN, the outside air data standard value VOM is determined in step 107.
Rewrite to IN average. This means that the outside air data standard value
Means to match OMIN to the lowest detected outside air data. Note that the reason for performing the average calculation is to remove noise from the detected data and stabilize it.

Regarding the inside air data, similar average value calculation and updating of the inside air data reference value VIM engineering are performed in steps 108 to 11 (2). However, if the average shyness data 7 is smaller than the reference value VIMIN, the reference value V is set in step 110.
I M r N is modified in response to the difference Δ in the outside air data. The purpose of this modification is to bring the determination level of the degree of contamination of the inside air closer to the degree of contamination of the outside air, thereby suppressing the change in the feeling of the occupants between the city and the suburbs.

In the control process, in step 201, outside air data V
Calculate the difference S between O and the outside air data reference value ■OMIN. The difference S is the reference difference E set in advance in step 202.
, D. The reference differences E and D are determined to close the intake port 10 when the degree of contamination of the outside air is greater than expected, and to open the intake port 10 when it is less than expected, and are provided with hysteresis. The comparison result of step 202 is
3, and if the degree of pollution of the outside air is greater than expected, step 204 is executed. In step 204, a command is given to the drive circuit 15 to first operate the actuator 9A to close the opening/closing member 10. Second, a command to stop the air guide device 1 is given to the drive circuit 16, and thirdly, a command to stop the wind exhaust device 6 is given to the drive circuit 17.

Thus, the interior of the bus vehicle is not ventilated other than natural ventilation.

When the determination result in step 203 indicates that the degree of contamination of the outside air is smaller than expected, step 2.5 is executed. In step 205, four ventilation modes Hi, Me, and Lo are set corresponding to the difference T between the internal air data Vl and the internal air reference data VIMIN.

One of the S HUT is selected and the drive circuit 15.16.17 is configured to implement the selected respective mode.
A control output signal is given to the

The mode selection is based on the difference T and the preset reference difference At, A.
2. B1. B2. This is realized by comparing C1 and C2. Each selected mode is implemented as follows.

(11Hi mode - A control output signal is given to each of the drive circuits 15 to 17 so as to open the opening/closing member 1o, operate the air guide device 1 with a large air guide capacity, and further operate the air exhaust device 6.

+21Me mode - A control output signal is provided to each of the drive circuits 15 to 19 so as to open the opening/closing member 1o, operate the air guide device 1 at a low air guide capacity, and further operate the air exhaust device 6.

(31Lo mode - A control output signal is attached to each of the drive circuits 15 to 17 so as to open the opening/closing member 1o, stop the air guide device 1, and further stop the air exhaust device 6.

In each of the above Hi, Me, and Lo modes, when the ventilation fan 4 is operating in the low speed mode, for example, 3
: Different ventilation volumes can be obtained with a ratio of 2:1.

(41S HOT mode - As described above.

By executing the above control program in this device, the intrusion of dirty outside air is prevented as mentioned above, and if the outside air is less dirty, the ventilation amount increases according to the dirtiness of the inside air. This reduces the amount of pollution in the air inside the vehicle while preventing temperature-controlled air from being released outside the vehicle.

In carrying out the present invention, the structure and function (whether or not the capacity is continuously changed) of the opening/closing member air guide device and the air exhaust device are not limited.

〔Effect of the invention〕

As described above, the present invention can also satisfy the energy saving effect when preventing pollution of the air inside the vehicle.

[Brief explanation of drawings]

FIGS. 1 and 2 are a schematic longitudinal sectional view and a cross sectional view of a bus vehicle to which the present invention is applied. FIG. 3 is a block diagram of the electric circuit, and FIG. 4 is a flow chart of the control program executed by the computer. ■... Air guide device, 6... Exhaust device, 7... Inside air sensor, 8... Outside air sensor, 9'... Opening/closing member, 10
...Vehicle outdoor air intake port, 14...Microcomputer, 14A...First control means, 14B...Second
means of control.

Claims (1)

[Scope of Claims] An opening/closing member that opens and closes a vehicle exterior air intake; a semiconductor device that is provided adjacent to the front vehicle exterior air intake to intake air into the vehicle interior; and a semiconductor device that sends air from the vehicle interior to the outside of the vehicle interior. an air exhaust device, an outside air sensor that detects dirt in the air outside the vehicle, an inside air sensor that detects dirt in the air inside the vehicle, and the opening/closing member when the dirt in the air outside the vehicle detected by the outside air sensor exceeds a predetermined level. a first control means for closing the opening/closing member according to the degree of contamination of the air inside the vehicle detected by the inside air sensor when the degree of contamination of the air outside the vehicle interior detected by the outside air sensor is below the predetermined degree; A ventilation system for a vehicle, comprising: second control means for controlling opening/closing and operation of the air guide device and the air exhaust device.