JPS59137208A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To prevent an automatic-temperature-control air conditioner from giving a feeling of uncomfortableness when a door or a window is opened for a short time in midsummer and in midwinter, by detecting the opening of the door or the window so that the quantity of a wind and its temperature just before the opening are maintained for a prescribed time since the opening. CONSTITUTION:When a door is opened for a short time during cooling against a high outside air temperature in midsummer, a switch 60 is turned on so that a timer 50 supplies an L-level output for a prescribed time. For that reason, a transistor 40 is turned off for said time to cut off the electricity supply to a cooling and a warming solenoids 25, 35 to keep an air conditioner in a fixed state in which the quantity of a wind and its blowoff temperature do not change. After the prescribed time, the timer 50 supplies an H-level output to return the air conditioner to the original state. Similar control is also effected during warming. Sharp changes in the wind temperature etc. at the time of the opening of the door or the like for a short time are thus prevented to improve comfortableness.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner for an automobile with automatic temperature control V211.

The main circuit diagram of a conventional automatic temperature control automobile air conditioner is shown in FIG. In this conventional example, d3 first includes an internal air sensor 10, such as a thermistor, which detects the temperature inside the vehicle, a JL (resistance 12° 13, and a variable resistor 1).
4-C, the bridge circuit is constructed at 1%.

The connection point between the internal air drain 10 and the resistor 11 is Pl, the connection point between the resistors 12 and 13 is P2, and the connection point between the resistors 13 and 14 is P3. The comparator 21 outputs one point one point.
.

1 to transistor 22 control the energization of the C00L solenoid 23, and 1 to transistor 332 control the energization of the C00L solenoid 23.
This controls the energization of the 0T solenoid 33.

Here, the C00L solenoid 23 is energized 7-
Then, negative pressure can be supplied to the power revolver via a transducer (not shown).

A power servo controls the amount of air that passes through the heater core and the amount of air that bypasses it through a mix door (not shown) installed in front of the heater core, mixes both of these, and then blows out the mixture. When negative pressure is supplied to this power servo, the mix door shown in the figure moves in the direction of blocking the front of the heater core, which causes air to flow from the air outlet in the passenger compartment.
In this case, the temperature of the wind discharged from the outlet is C0.
The longer the 0L solenoid 23 is energized, the smaller the front surface of the heater core is to reduce the amount of air passing through the heater core, so the temperature of the air coming out of the outlet becomes lower.

On the other hand, when the l-10T solenoid 33 is energized, it supplies atmospheric pressure to the power servo via the transducer. When atmospheric pressure is supplied to the power servo, the mix door moves in the direction of opening the front surface of the heater core, allowing a stream of higher temperature to be discharged from the air outlet in the vehicle interior.

In addition, in this case, the temperature of the air discharged from the outlet is l
-The longer the energization time of the solenoid 33 for 10T, the more the mix door moves so that the front surface of the heater core can be heard more widely, so the amount of air passing through the heater core increases and the air blows out.
The true temperature of J emitted from becomes higher. In addition, the variable resistor 14 is linked to the rod of the above-mentioned B)-1 Norvo,
Its resistance area changes η, and it is a feedback resistance.

Further, as the mix door moves further away from the intermediate position, the rotational speed of the fan motor (not shown) becomes higher, and the air volume increases.

Next, the operation of the above conventional example will be explained. First, when the W+A degree inside the vehicle interior detected by the inside air sensor 10 is almost the same as the set temperature, the entire circuit shown in Fig. 1 is balanced, so both the comparators 21 and 31 do not output. , no current flows through the solenoid 23.33. Therefore, since the transducer and power servo do not change, the mix door also does not move, and the temperature of the air exiting from the outlet increases.
There is no change.

However, when the temperature inside the vehicle cabin detected by the inside air sensor 10 becomes higher than the set temperature, the voltage at the point P1 rises and becomes higher than the voltage at the 12 points.
is output, and transistors 1 to 22 are turned on. As a result, the Cool solenoid 23 is turned upright, and as explained above, air with a temperature lower than J2 is discharged from the outlet. Also, the amount of J lice increases. Conversely, when the temperature inside the vehicle cabin detected by the inside air sensor 10 becomes lower than the set temperature, the voltage at point P1 decreases and becomes lower than the voltage at point 23, so that the comparator 31 The transistor 32 outputs A>Z. By this, l-10T
The solenoid 33 is energized, and as explained above, higher temperature air is discharged from the outlet. In conjunction with the above operation, the voltage of the variable resistor 14 changes and eventually reaches an equilibrium state. These operations are repeated to ensure that the temperature inside the vehicle is always close to the set temperature.

But 1. In the conventional example described above, there is a problem in that when the door or window is opened for a short time, the temperature and volume of the blown air change significantly, which may give an unfavorable feeling.

For example, when a person opens the door for a short time to get on and off the air conditioner in the middle of summer, or when the window is opened for a short period of time to give or receive a toll at an expressway toll gate, the i0i When thirsty air enters the middle room and the high-temperature air touches the inside air sensor 10, the inside air sensor 10 reacts sensitively. In this case, from the perspective of the circuit shown in FIG. 1, this means that the temperature inside the vehicle has increased. Therefore, a large amount of extremely low-temperature wind is discharged from the outlet. However, since only a small amount of outside air has entered the train, the average thirst mark inside the conductor has not actually decreased that much. Because of this, FI members suddenly become more
This means that U1 will be exposed to cold wind.
``Feeling'' 2. Good J. Not good.

Even if you open the door or window for a short period of time in the middle of winter when the indoor temperature is almost the same as the set temperature, you will suddenly be exposed to a large amount of warm air, so the It is the same as above in that it is unfavorable in terms of the ring.

On the other hand, if the responsiveness of the C1 internal air sensor 10 is reduced, the above problem can be solved to some extent. However, this approach causes another problem in that the response of the entire air conditioner becomes slow, and when the humidity inside the vehicle is very high or low, it takes a long time to reach the set temperature. Therefore, this measure cannot be adopted.

The present invention has been made by focusing on the above-mentioned conventional problems, and is an air conditioner for an automobile that prevents occupants from feeling uncomfortable when a door or window is opened for a short period of time in midsummer or midwinter. The purpose is to provide the following.

In order to achieve this objective, the present invention detects the temperature inside the vehicle with an inside air sensor, and automatically controls the air volume and air temperature so that the temperature detected by the inside air sensor approaches the set temperature. In an automobile air conditioner that discharges air into the vehicle interior, there is a switch that detects the open state of the door or window, and a predetermined period of time from when the door or window starts to open.
As soon as the timer is activated and this timer is activated, the wind fJ! The device is also characterized by having air volume and air temperature fixing means for fixing the air temperature to the state immediately before the timer operation.

Hereinafter, the present invention will be described in detail based on embodiments not shown in the accompanying drawings. Incidentally, the same members as those shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. FIG. 2 is a circuit diagram of an embodiment of the present invention.

In this figure, a switch 60 is turned on when a door or window (not shown) of an automobile is opened. Further, the timer 50 outputs the 1-level for a predetermined time period T from when the switch GO is turned off, and outputs the 14-level at other times. It is something that has been done. Transistors 25 and 35 correspond to transistors 22 and 32 in FIG. However, the emitters of I transistors 25 and 35 are connected to each other, and they are connected to the collectors of transistors 1 to 40.

Further, the emitter of the transistor 40 is grounded, and the base of the transistor 40 is connected to the output terminal of the timer 50.

Next, −[d(clarification) regarding the operation of the above embodiment.

FIG. 3 is a time chart A1 of the above embodiment, and the explanation will be given along this diagram. First, assume that the season is midsummer, the outside temperature is very high, and the air conditioner is in the cooling state. Here, when the door is closed, the switch 60 is on and the timer 550 is outputting an H level. At this time, the transistor 40 is turned on, and the air conditioner operates in the same manner as the conventional example shown in FIG.

Now, assume that the door is opened for a short time (for example, within 10 seconds). As a result, the switch 60 is turned off, and the timer outputs an L level output for a predetermined period of time (for example, 10 seconds). At this time, the transistor 40 is turned off for 10 seconds, and during this 10 seconds, the C00I- a3 and the I-10'T' solenoid H' 25.35 are not energized. For this purpose, the air conditioner is held in a fixed state for those 10 seconds. During these 10 seconds, the humidity of the air coming out of the outlet does not change, nor does the air volume.

10 seconds after the door is heard, the door is closed and the timer 50 outputs an output of level 1, so 1.
- The transistor 40 is turned on, and the air conditioner of the suitable person i is activated. At this time, the ambient humidity around the inside air sensor 10 is averaged, and its temperature is not much different from the average temperature inside the room 717. Therefore, in that case, even if the air conditioner is operated normally, very low temperature air will not come out from the outlet.

For this reason, the occupants do not feel the 3a sense of harmony.

On the other hand, if the door is left open for a predetermined period of time (more than 10 seconds in the above example) after hearing the door, the timer 50 outputs an output of 1-level. The air conditioner is activated.At this time, the temperature inside the vehicle has risen considerably, so the JA value of the inside air sensor 10 becomes very small.

Therefore, one voltage at 11 points rises and the comparator 21 outputs, so the transistor 25 turns on, the C00L node r is energized, the mix door lowers, and cold air comes out from the outlet. As the mix door descends, the value of the C1 resistor 14 gradually increases, and when the pressure at point 1 and the voltage at point 2 become equal, the mix door is fixed. This allows the temperature to quickly approach the set temperature when the temperature inside the vehicle changes significantly.

The present invention includes a limit switch that detects the open state of a door or window, a timer that operates for a predetermined period of time from when the door or window starts to open, and when the timer is operating, the air volume and 1! It is sufficient if there is an air volume and air temperature fixing means for fixing the @temperature to the state immediately before the timer operation.

In the embodiment of FIG. 2, the switch 60
The timer 50 corresponds to the above-mentioned timer, and the transistor 40 corresponds to the above-mentioned wind temperature fixing means. Therefore, in addition to the above embodiments, modifications thereof are included in the present invention.

Further, the timer period may be set arbitrarily as necessary, and the timer period may be set to be different for doors and windows. Furthermore, when the door opens, the room lamp lights up, and at this point, the switch that detects the open state of the door is used as the limit 1 switch (Shioi 3°). Although it is possible to operate the power 1f-bore by output alone, sensors are installed to detect indoor and outdoor humidity, solar radiation on the conductor, etc., and depending on the output from these sensors, the -C power-bore is activated. It may be possible to avoid activation.

As described above, the present invention is designed to prevent passengers from feeling uncomfortable when a large amount of low- or high-temperature wind suddenly comes out from the platform with the door or window open for a short time before midsummer or midwinter. It has the effect of never happening.

[Brief explanation of drawings]

Figure 1 is a circuit diagram of a conventional automatic lj air conditioner;
The figure does not show a circuit diagram of an embodiment of the present invention, and FIG. 3 shows a time chart 1 of the embodiment described above. 10... Inside air sensor, 21.31... Comparator, 23
...Solenoid for COOL, 33...Solenoid for H01-, 50...Timer, 50...Limits 1~
switch,. 1, Ii:'l Departure (person [1 radiator stock meeting 6C Fig. 1 23 60th 1 Gukai Y Fig. 2 Fig. 3 of Kuima 50

Claims (1)

[Claims] Automotive air that detects the temperature inside the vehicle with an inside air sensor and automatically controls the air volume and temperature so that the temperature detected by the inside air sensor approaches the set temperature and discharges it into the passenger compartment. The conditioner includes a switch that detects the open state of a door or window, a timer that operates for a predetermined period of time when the door or window begins to open, and a timer that operates to monitor the air volume and temperature. It is fixed to the state immediately before the timer activated. 1. An air conditioner for an automobile, characterized in that the air conditioner and the layer temperature fixing means are arranged on the right side.