JPS5946806B2 - Air control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air control device for controlling indoor air temperature in a vehicle such as an automobile.

Conventionally, in automobiles, etc., the operation of heaters and air conditioners is controlled by the detection output of an indoor temperature sensor installed indoors.
The vehicle is equipped with an air control device that maintains a comfortable interior temperature.

However, in the conventional air control device, the operation of the air conditioner and the heater is controlled based only on the detection output of the indoor temperature sensor, resulting in the following energy waste.

In other words, if you close the windows or ventilator and run the air conditioner without knowing that the outside temperature is lower,
Or, you may close the windows or ventilator and turn on the heater without realizing that the temperature outside is higher.

The present invention was made in order to eliminate such energy waste, and an object of the present invention is to provide an air control device that enables efficient operation of air conditioners and heaters.

In order to achieve such an object, the present invention provides an air control device for controlling the indoor temperature of a vehicle by controlling a heater and an air conditioner based on the detection output of an indoor temperature sensor installed inside the vehicle. an outside air temperature sensor that detects the outside air temperature outside the room; an opening/closing control device that opens and closes the outside air intake window based on command signals to open and close the outside air intake window; a first circuit that compares the temperature with a set signal indicating the temperature; and a first circuit that issues a command signal to close the outside air intake window when the indoor temperature exceeds the upper limit temperature based on the comparison output of the first circuit; and a third circuit that issues a command signal to close the outside air intake window when the indoor temperature falls below the lower limit temperature based on the comparative output of the first circuit, and operates the heater. a fourth circuit that compares the detection output of the outside air temperature sensor and the setting signal ♂; and based on the comparison output of the fourth circuit, the outside air temperature is within the range of the upper limit temperature and the lower limit temperature. The present invention is characterized by comprising a fifth circuit that issues a command signal to open the outside air intake window and stops the operation of the air conditioner and the heater.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.

Note that in this specification, a window and a ventilator are defined as an outside air intake window unless one or the other is specified.

FIG. 1 is a circuit diagram showing one embodiment of the present invention, which can be roughly divided into an indoor temperature sensor 1, an outside temperature sensor 2, a vehicle speed sensor 3, a comparison side rear circuit 4, a window opening/closing sensor 5, and a window opening/closing sensor 5. It is composed of an opening/closing control device 6, an air conditioner 7, and a heater 8.

The vehicle speed sensor 3 includes a disk 30 having N-pole and S-pole magnet pieces.
is attached to the axle or wheel, and a reed switch Sw1 is attached close to the disc 30, so that the disc 3 changes as the vehicle speed changes.
A pulse signal SP having a frequency corresponding to the vehicle speed is obtained from the reed switch SWI by the rotational change of 0. This vehicle speed sensor 3 is provided to perform air control taking into account the vehicle speed.

The comparison control circuit 4 compares the detection outputs of the indoor temperature sensor 1, the outside air temperature sensor 2, and the vehicle speed sensor 3 with setting signals indicating the upper and lower limits of the indoor temperature, and controls the opening/closing of the windows based on the comparison result. Control command and air conditioner 7, heater 8
The first comparison circuit 41 determines whether the vehicle speed has been below 80 km/h for more than 3 minutes: When the indoor temperature Ti exceeds the upper limit temperature TH (T i > emit a window close command signal at TH), and issue an operation command signal for the air conditioner 7, and when the indoor temperature Tj falls below the lower limit temperature TL (Ti<T4.), issue a window close command signal; and a second comparison circuit 42 that issues an operation command signal for the heater 8, and an outside air temperature T.

is within the range between upper limit temperature TH and lower limit temperature TL (TL≦Jo
≦TH), a third comparison circuit 43 generates a window open command signal.

In this case, when performing window opening/closing control, the comparison control circuit 4 performs the above-described control by also taking into account the window open state detection signal and the window closed state detection signal output from the window open/close sensor 5. .

The second comparison circuit 42 also includes a circuit including comparators 421 and 422 that compares the detection output of the indoor temperature sensor 1 with setting signals indicating the upper limit temperature TH and lower limit temperature TL of the indoor temperature Ti, and a comparison between this circuit. an or gate O that issues a command signal to close the outside air intake window and operates the air conditioner when the indoor temperature Ti exceeds the upper limit temperature TH based on the output;
G1. AND date AG3, a circuit consisting of a transistor Q6, and an OR gate OG1 which issues a command signal to close the outside air intake window and operates the heater when the indoor temperature Ti falls below the lower limit temperature TL based on the comparison output.
, AND gate AG2° transistor Q.

The third comparison circuit 43 includes a circuit including comparators 431 and 432 that compare the detection output of the outside air temperature sensor 2 with setting signals indicating the upper limit temperature TH and lower limit temperature TL of the indoor temperature Ti, and the comparison output of this circuit. Based on outside temperature ET.

an OR gate OG that issues a command signal to open the outside air intake window when the temperature is within the range of the upper limit temperature TH and the lower limit temperature TL;
4. It is composed of OG5 and a circuit consisting of AND gates AG6 to AG8.

The window open/close sensor 5 outputs a signal (open state detection signal, closed state detection signal) according to the open/close state of the window.
Magnets m attached to the upper and lower ends of 91. m
Reed switch SW2, which is turned on and off by g2. S
Equipped with W3.

The window opening/closing control device 6 includes a motor M, a transistor Q
When the window opening command signal DO is given, only the transistors Q2 and Qs become conductive, and the motor M rotates in the direction in which the window W opens, and when the window closing command signal DC is given, the transistors Q1 and Q4 The structure is such that the motor M rotates in the direction in which only the window W is closed and the window W is closed.

The outside air temperature sensor 2 is installed, for example, near the front end of the vehicle, as shown in FIG. 2, in a place that is well ventilated and is not easily affected by direct sunlight or reflected heat from the road.

Next, the operation of the above configuration will be explained with reference to the flowchart shown in FIG.

First, the second comparison circuit 42 converts the detection output of the indoor temperature sensor 1 into a corresponding digital signal in the AD transformer 420, and converts this into a signal STi indicating the current indoor temperature Ti.
is given to comparator 421 and comparator 422 as follows.

A setting signal STL (digital signal) indicating the lower limit temperature TL of the indoor temperature and a setting signal STH (digital signal) indicating the upper limit temperature TH of the room temperature are provided as comparison reference inputs to each of the comparators 421 and 422.

Therefore, the comparator 421 determines that the indoor temperature Ti is the lower limit temperature TL.
Outputs three signals: higher, equal, and lower compared to .

Further, the comparator 422 outputs three signals indicating that the indoor temperature Ti is higher than, equal to, and lower than the upper limit temperature TH.

Of the output signals of the comparators 421 and 422, a signal indicating that the temperature is lower than the lower limit temperature and a signal indicating that the temperature is higher than the upper limit temperature are input to the AND gate AG via the OR gate OG1.

Here, an AND is performed with a signal indicating the open state of the window given from the inverter INV, and the AND signal is supplied to the opening/closing control device 6 as a window close command signal DC.

That is, in the AND gate AG, the window is open and the indoor temperature Ti is Ti<T4. Alternatively, the window close command signal DC is output when the condition is Ti>TH.

As a result, the motor M in the opening/closing control device 6 is activated, and the window W is closed.

When the window W closes, the reed switch SW2 is turned on, and a signal indicating the closed state of the window is output from the reed switch SW2.

The closed state signal of this window is the AND gate AG2 and AG3.
However, at this time, the indoor temperature Ti becomes T i < T
L, and if a signal indicating this is output from the comparator 421, the AND gate AG2 supplies a command signal for operating the heater 8 to the heater 8 via the transistor Q.

Conversely, if the indoor temperature Ti is T i > T H and a signal indicating this is output from the comparator 422, then
AND gate AG3 supplies a command signal for operating air conditioner 7 to air conditioner 7 via transistor Q6.

In other words, when the indoor temperature Ti is
When <TH, an operation command signal for the heater 8 is generated on the condition that the window W is closed.

Also, the AND gate AG3 indicates that the indoor temperature Ti is Ti>TH
At this time, an operation command signal for the air conditioner 7 is generated on the condition that the window W is closed.

By the way, among the output signals of the comparators 421 and 422, Ti>TL, Ti=TL, and Ti=TH.

A signal indicating T i <T H is output from the OR gate OG2. O.G.
3 and is logically summed, then AND gate A
It is input to G4.

Therefore, from AG4, the indoor temperature Ti is TL
A signal indicating that the condition ≦Ti≦TH is satisfied is obtained.

The output signal of this AND date AG4 is the third comparison circuit 43.
is input to the AND gate AG5, where the outside air temperature To obtained from the AND gate AG6 is TL≦T.
A logical AND is performed with a signal indicating that o≦TH.

That is, the third comparison circuit 43 first converts the detection output of the outside air temperature sensor 2 into a corresponding digital signal using the AD converter 430, and supplies the digital signal to the comparators 431 and 432.

A setting signal STL indicating the lower limit temperature TL and a setting signal STH indicating the upper limit temperature TH are provided as comparison reference inputs to the comparators 431 and 432, respectively.

Therefore, from the comparators 431 and 432, the outside air temperature T
.

Signals are obtained that represent three states: higher, equal, and lower than the lower limit temperature TL and the upper limit temperature TH, respectively.

Among the signals obtained in this way, the signals indicating To>TL and To−TL, and the signals indicating To2TH and To<TH
The signals indicating 1 and 2 are logically summed at OR gates OG4 and OG, respectively, and then logically ANDed at AND gate AG6.

Therefore, from the AND gate AG6, the outside temperature To is TL
A signal indicating that ≦To≦TH is obtained.

The output signal of this AND gate AG6 is inputted to the AND gate AG5 as described above, where the indoor temperature T
i is ANDed with a signal indicating that TL≦Ti≦TH.

Therefore, from AND gate AG5, indoor temperature Ti and outside temperature To are TL≦Ti≦TH, and TL≦To≦
A signal indicating TH is obtained.

The output signal of this AND gate AG5 is
7, where it is ANDed with a signal indicating that the vehicle speed has been below 80/crrL/h for three minutes or more.

The signal indicating that the vehicle speed is 80/cm/h or less for three minutes or more is generated from the first comparison circuit 41 based on the detection output of the vehicle speed sensor 3.

That is, the first comparison circuit 41
A pulse signal having a frequency corresponding to the vehicle speed obtained from the pulse signal is converted into a corresponding voltage signal in an FV converter 410, and then further converted into a corresponding digital signal in an AD converter 411 and provided to a comparator 412.

A comparison reference signal corresponding to a vehicle speed of 80/a/h is input to the comparator 412.

Therefore, the comparator 412 indicates that the current vehicle speed SPi is 80.
Three signals are obtained: slower than, equal to, and faster than IaIL/h.

Among these, 5Pi=801aIyh and SPi<80
After the signals indicating b and 'h are logically summed at the OR gate OG6, they are outputted as a reset signal for the frequency divider 413 with a built-in oscillator.

After receiving a reset signal from OR gate OG6, frequency divider 413 counts clock pulses of a predetermined frequency, and outputs a timer signal indicating this after three minutes have elapsed.

This timer signal is provided as a set output of flip-flop 414, thereby causing flip-flop 414
is set.

In this case, the flip-flop 414 is given a signal from the comparator 412 as a reset signal indicating that S P i >80kn and 'h.

Therefore, the flip-flop 414 indicates that the vehicle speed SPi is 80b.
/h or less for more than 3 minutes, set it to 80
It is reset when it exceeds kIn/h.

The signal indicating that the vehicle speed SPi obtained in this manner has been maintained at 80/a'h or less for more than 3 minutes is the third signal.
At the AND gate AG7 of the comparator circuit 43, TL≦Ti
It is logically ANDed with a signal indicating that ≦TH and TL≦'ro≦TH.

As a result, from the AND gate AG7, TL≦Ti≦
TH, and TL≦To≦TH, and SPi≦
A signal indicating that the 80b/h state has continued for 3 minutes or more is output.

This AND gate AG7 output signal is
Here, the logical product with the signal indicating the closed state of the window given from the inverter IN2 is taken, and the logical product signal is sent to the opening/closing control device 6 as the window opening command signal Do.
supplied to

That is, the window of AND gate AG8 is closed, the indoor temperature Ti and the outside temperature To are within the range of the upper limit temperature TH and the lower limit temperature TL, and the rate of 80 Ian/h is
Window W under the condition that the following vehicle speeds continue for more than 3 minutes
The opening command signal DO is generated.

This causes the motor M to operate and the window W to open.

When the window W opens, the reed switch SW3 closes and a signal indicating that the window W is opened is output from the reed switch SW3.

As a result, the logical product condition in AND gate AG8 is not satisfied, and generation of the window opening command signal is stopped.

By the way, when opening and closing windows automatically, it is dangerous to do so without prior notice.

In this embodiment, an OR gate OG7 generates a logical sum signal of the window open command signal DO and window close command signal DC, and this logical sum signal is amplified by a transistor Q7 and then given to the alarm AL as a drive signal. An alarm sounds when the door is opened or closed.

To summarize the above operations, the flowchart 1 in FIG. 3 is as shown.

Therefore, according to this embodiment, the window is closed and the air conditioner is used even though the outside temperature is low, or the window is closed and the heater is used even though the outside temperature is high. This eliminates the need to leave the windows open and use the air conditioner or heater.
It allows efficient use of heaters and is extremely effective in measuring energy consumption.

Especially when opening the windows to let in outside air, the vehicle speed is 80 I.
The condition that ar1/h or less is taken into consideration.

This is a measure to avoid the vehicle speed becoming too high and opening the windows at such high speeds causing discomfort.

This allows passengers to always drive the car at a comfortable temperature.

Note that this vehicle speed condition may be added as necessary in order to eliminate wasteful usage of the air conditioner and heater and from the viewpoint of energy saving.

Further, in the embodiment, various comparison operations are performed using random logic, but they may also be performed using a microcomputer element or the like.

In addition, the intake of outside air may be performed by controlling the opening and closing of a ventilator.

As is clear from the above explanation, the air control device of the present invention includes an outside air temperature sensor that detects the outdoor air temperature, and an opening/closing operation that opens and closes the outside air intake window in response to an outside air intake window opening and closing command signal. A control device is installed to compare the detected outputs of the indoor temperature sensor and the outside air temperature sensor with setting signals indicating the upper and lower limit temperatures of the indoor temperature, respectively, and to adjust the temperature of the outside air intake window so that the indoor temperature is comfortable based on the comparison output. Since the opening/closing control of the air conditioner and the operation of the air conditioner and the heater are controlled, the main air control in the vehicle can be performed extremely efficiently, resulting in an extremely excellent effect in terms of energy saving.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of the mounting position of an outside temperature sensor, and FIG. 3 is a flowchart summarizing the operation of the embodiment. 1...Indoor temperature sense, 2...Outside temperature sensor, 3...Vehicle speed sensor, 4...
Comparison control circuit, 5...Window opening/closing sensor, 6...
...Window opening/closing control device, 7...Air conditioner, 8
······heater.

Claims (1)

[Claims] 1. An air control device that controls the indoor temperature of a vehicle by controlling a heater and a cooler based on the detection output of an indoor temperature sensor installed inside the vehicle; an opening/closing control device that opens and closes the outside air intake window in response to command signals to open and close the outside air intake window; and a first circuit that compares the detection output of the indoor temperature sensor with a setting signal indicating an upper limit temperature and a lower limit temperature of the indoor temperature. a second circuit that issues a command signal to close the outside air intake window and operates the air conditioner when the indoor temperature exceeds the upper limit temperature based on the comparison output of the first circuit; A third circuit that issues a command signal to close the outside air intake window when the indoor temperature falls below the lower limit temperature based on the comparative output of the circuit, and operates the heater.
a fourth circuit that compares the detection output of the outside air temperature sensor with the setting signal; and based on the comparison output of the fourth circuit, the outside air temperature is within the range of the upper limit temperature and the lower limit temperature. an air control device comprising: a fifth circuit that issues a command signal to open an outside air intake window and stops the operation of the air conditioner and the heater;