JPS607208Y2 - Automatic air conditioner temperature setting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a temperature setting device for an automatic near conditioner device used in vehicles and the like.

Conventionally, in order to maintain the vehicle interior temperature at the set temperature specified by the driver, there has been a control circuit that compares the above two temperatures and generates an electrical signal, and a control circuit that is activated by the electrical signal and passes through a heating heat exchanger. An automatic near conditioner device has already been proposed that has a solenoid valve type fluid switching valve device that controls the transmission of working fluid pressure to an actuator that operates a door for controlling the door.

However, in this type of conventional device, when holding the set temperature, in other words, it cannot be determined in advance whether the set temperature is appropriate for the driver, etc., so the -throw set temperature is instructed and the above-mentioned After adjusting the vehicle interior temperature through a series of operations of the automatic near conditioner device, if the set temperature is not comfortable for the driver or the like, it is necessary to re-instruct the desired set temperature.

Therefore, an object of the present invention is to make it easier for the driver to set a comfortable temperature.

The configuration of the present invention, which is related to the above object, is that the temperature setting circuit includes means for changing a set potential corresponding to the set temperature in a waveform with a predetermined amplitude and period in response to the temperature setting operation, and and a means for fixing the potential at an arbitrary potential during the change.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 10 is a temperature setting circuit, and 11 is a vehicle interior temperature detection circuit. By applying their respective output signals to a comparator circuit 12, the comparator circuit 12 determines the vehicle interior temperature relative to the set temperature. The difference controls the operation of the electromagnetic valve means 13 for switching the working fluid.

The solenoid valve means 13 has a pair of switching solenoid valves 14.15, each solenoid valve 14.15 being moved to its closed position against a spring 18.19 by the attractive force when the coil 16.17 is energized. It has valve bodies 20 and 21 that move from the open position to the open position.

The valve body 20 operates to open and close communication between an inlet 22 connected to a negative pressure source such as an intake manifold of the vehicle and an output 23, and the valve body 21 operates to open and close communication between an inlet 24 and an output 23 connected to an atmospheric source such as an air cleaner. It operates to open and close the communication between the two.

When the valve body 20 opens in this manner, operating negative pressure is allowed to be introduced into the passage 27 leading to the actuator 26, and when the valve body 21 opens, the atmosphere is allowed to be introduced into the passage 27.

When the temperature inside the vehicle is higher than the set temperature, the coil 17 of the solenoid valve 15 is energized and the valve body 21 is opened, and when the temperature inside the vehicle is lower than the set temperature, the coil 16 of the solenoid valve 14 is energized and the valve body 20 is opened. It is configured to open.

The actuator 26 has a displacement member 30 made of a diaphragm or the like whose outer periphery is sandwiched between the bodies 28 and 29, thereby defining an operating chamber 31 connected to the passage 27 and an atmospheric pressure chamber 32 within the body.

A spring 33 is disposed within the working chamber 31 to bias the displacement member 30 to the right in the figure.

An operating rod 34 is fixed to the displacement member 30 and extends to the outside through the body 29, and the rod 34 further extends into a ventilation passage 35 through which air is blown through a cooling heat exchanger by a blower drive motor or the like. There is.

The other end of the rod 34 is connected to a so-called door 37 for adjusting the mixing ratio of cold air and warm air, which controls air blowing to a heating heat exchanger 36 in which a passage 35 is provided.

One end 38 of the door 37 is pivoted at a suitable location on the exchanger 36 or the passage 35, and the door 37 is rotated in accordance with the actuation of the rod 34 in response to the displacement of the displacement member 30. Controls air blowing through exchanger 36.

As described above, when atmospheric pressure is introduced into the chamber 31 of the actuator 26 by the operation of the solenoid valve means 13, the spring 3
3, the displacement member 30, and therefore the rod 34, moves to the right in the figure, and the door 37 rotates clockwise to reduce the airflow through the heating heat exchanger 36, thereby lowering the temperature inside the vehicle. On the other hand, the chamber 3 is opened by actuation of the solenoid valve means 13.
1, the displacement member 30 and the rod 34 move to the left against the spring 33, and the door 37 rotates counterclockwise to increase the air flow through the heating heat exchanger 36. The function is to raise the temperature inside the vehicle.

When the temperature inside the vehicle is maintained at the set temperature, both electromagnetic valve means 14 and 15 are in the non-operating position shown, and the fluid pressure that has been introduced into the chamber 31 of the actuator 26 is maintained. As a result, the desired temperature inside the vehicle is maintained.

Here, the configuration and operation of the set temperature circuit 10 will be described in detail with reference to FIG.

The other end of the power source 40, which is connected to ground at one end, is connected to ground via a first normally open switch 41, through resistors 42 and 43, and to an astable multivibrator type oscillation circuit 44 at the other end.

The oscillation circuit 44 has first and second FETs 45 and 46. Assuming that the first FET 45 is on and the second FET 46 is off, the source potential of the first FET via the resistor 49 is the minimum, and the source potential of the second FET is expensive.

Therefore, the first capacitor 47 is being charged through the resistor 50 and its potential gradually increases, and when the gate potential of the second FET 46 increases, the second FET 46 turns on, and the base potential of the second FET 46 via the resistor 51 becomes minimum.

This potential change is transferred to the first F through the second capacitor 48.
It is transmitted to the gate potential of ET45 and turns off the first FET45.

Next, the electric charge of the second capacitor 48 is charged through the resistor 52, and the gate potential of the first FET 45 becomes high.
FET 45 is turned on and second FET 46 is turned off.

In this way, the first and second FETs 45 and 46 are alternately turned on and off, thereby causing the output potential 53 of the oscillation circuit 44 to have the well-known effect of repeatedly increasing and decreasing at a predetermined period.

The output potential is waveform-modified by a resistor 59 via the second normally open switch 54 and is applied to the third FET 55.

Note that, as shown in the figure, a third capacitor 56 is provided that extends to the gate side of the third FET 55.

From the above, when both switches 41.54 are closed, the 3rd FE
Waveform high potential and low potential of a predetermined period are alternately applied to the gate side of T55, whereby the third FET 55 functions as a variable resistor that changes the resistance.

On the drain side of the third FET 55, a variable resistor 60 whose resistance value is changed according to a temperature setting instruction from the driver is disposed, and the source side thereof is connected to a power source via a resistor 61.

When both switches 41 and 54 are closed by the driver who desires the action of the automatic near conditioner device and the variable resistor 60 is set to the desired resistance value, the third FET 55 is applied to its gate side by the action described above. Its resistance value changes depending on the waveform potential of a predetermined period.

In other words, the higher the waveform potential is applied to the gate side of the third FET 55, the greater its resistance value becomes.

Therefore, the output potential 62 on the source side of the third FET 55 is a waveform potential with a predetermined period, which is superimposed on the potential determined by the resistance value set in the variable resistor 60 by the resistance of the third FET 55, which changes with a predetermined period. becomes.

As a result of applying such a waveform potential to the comparison circuit 12 described above, the near conditioner device described in detail with reference to FIG. to periodically adjust the waveform.

When the driver or the like opens the switch 54 during the periodic wave-like adjustment of the vehicle interior temperature, when the driver or the like feels that the temperature is comfortable, a potential corresponding to the temperature is applied to the gate side of the third FET 55.
In other words, the memory is stored in the capacitor 56, and the third FET5
The current flowing between the source and drain of No. 5 is fixed at a constant value.

That is, the output potential 62 that reaches the comparator circuit 12 is fixed at a value corresponding to the comfortable temperature.

Therefore, from then on, the temperature inside the vehicle is maintained at a temperature that the driver feels is comfortable.

As detailed above, in the automatic near conditioner device according to the present invention, when setting the temperature inside the car for the driver, the temperature inside the car is first changed in a waveform with a predetermined amplitude and period, and during the waveform change, the temperature inside the car is set by the driver, etc. It is possible to set the temperature at which the user feels comfortable.

Therefore, there is an advantage that it is not necessary for the driver or the like to repeat the operation several times in order to set the comfortable temperature as in the conventional case.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an automatic near conditioner device according to the present invention, and FIG. 2 is a detailed diagram of the temperature setting circuit of FIG. 1. 10... Temperature setting circuit, 11... Vehicle interior temperature detection circuit, 12... Comparison circuit, 13. Solenoid valve means, 14, 15...・Switching valve, 26
...Actuator, 36 ... Heat exchanger, 37 ... Door, 41.54 ... Switch, 44 ... Oscillation circuit, 55・・・・・・
3rd FET, 56... Capacitor, 60.
- Curved variable resistor.

Claims (1)

[Scope of utility model registration request] A comparison circuit that compares output signals from a temperature setting circuit and a vehicle interior temperature detection circuit, a switching valve operated by the output signal from the comparison circuit, an actuator operated by a working fluid switched and controlled by the switching valve, and In an automatic near conditioner device having a door that controls the amount of air blown through a heat exchanger in conjunction with the operation of the actuator, the temperature setting circuit sets a predetermined set potential corresponding to the set temperature in accordance with the temperature setting operation. 1. An automatic near conditioner device comprising: means for periodically changing the amplitude of the voltage in a wave-like manner; and means for fixing the potential at an arbitrary potential during the change to the set potential.