JPH05278445A - Air conditioner - Google Patents

Abstract

PURPOSE:To fluctuate the air capacity given directly to a user of air conditioner immediately after the starting of fluctuation of the air capacity, and after that, to carry out the fluctuation of the air capacity which has an awakening effect or a resting effect, by carrying out the fluctuation of the air capacity systematically timingly depending on the input of a fluctuation starting signal. CONSTITUTION:A fluctuation width DELTAV is output to a blower controller 4 continuously at the same time when a fluctuation switch 22 is turned ON, and the blower voltage applied to a blower motor 11 is fluctuated continuously making the medium level as the base. And after two minutes pass, for example, the fluctuation width DELTAV is output to the blower controller 4 irregularly timingly. By controlling to flucutuate the blower voltage irregularly after two minutes pass, for example, in such a way, 8 resting effect or an awakening effect to the rider can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for varying the amount of air blown into a room.

[0002]

2. Description of the Related Art As disclosed in Japanese Unexamined Patent Publication No. 1-229716, an M-sequence pseudo-random signal is servo-controlled.
2. Description of the Related Art Conventionally, there has been known a vehicle air conditioner that outputs a power to a vehicle and repeatedly changes an air distribution damper connected to the servo motor, and as a result, repeatedly changes the amount of air blown into the vehicle interior.

[0003]

When the amount of air blown into the vehicle is repeatedly changed by outputting an M-sequence pseudo-random signal as in the conventional device, the amount of air blown may or may not change. A condition occurs. The change or non-change of the blown air volume is very effective for a vehicle occupant in terms of, for example, the awakening effect or the rest effect, but on the other hand, the occupant starts changing the blown air volume. It is conceivable that even if a switch or the like is operated in an attempt to cause it, a state in which the blown air volume does not change for a while thereafter occurs. In this case, there arises a problem that an occupant feels a sense of discomfort when he / she wants the air volume variation to be performed, but not.

Therefore, the present invention has been made in view of the above problems, in which the air volume of the air which directly hits the air conditioning user is changed immediately after the start of the air volume change, and thereafter, for example, a wake-up effect or a rest effect is given to the driver. It is an object of the present invention to provide an air conditioner capable of changing a certain air volume.

[0005]

In order to achieve the above object, the present invention provides a ventilation passage for introducing air into a room, a ventilation means for blowing air into the room through the ventilation passage, and an air passage in the ventilation passage. A heat exchange means arranged to cool or heat the air;
An air volume adjusting means for adjusting the air volume of the air blown by the air blowing means through the ventilation passage and directly hitting an air conditioning user in the room; a variation start means for outputting a variation start signal for repeatedly varying the air volume; A fluctuation start signal is input, and based on the input of this fluctuation start signal, a fixed regular fluctuation signal for causing the fluctuation of the air flow to be regularly performed in time is output to the air flow adjustment means, The gist of the present invention is an air conditioner provided with an air volume changing means for outputting to the air volume adjusting means an irregular variation signal for causing the air volume to be varied irregularly in time after a lapse of a predetermined time.

[0006]

In the present invention, the air blowing means blows air toward the driver in the room through the ventilation passage, and the air is cooled or heated by the heat exchange means. Further, the air volume of the air that directly hits the air-conditioning user is adjusted by an air volume adjusting means such as a blower motor, a swing louver, and a wind distribution damper.

When the fluctuation start signal is output by the fluctuation start means to repeatedly change the air quantity, the fluctuation start signal is input to the air quantity fluctuation means, and the air quantity fluctuation means adjusts the constant regulation fluctuation signal based on the input. Output to the means. As a result, as soon as the fluctuation start signal is output by the fluctuation start means, the fluctuation of the air volume occurs, and the air quantity directly hitting the air conditioning user fluctuates regularly in time. And the driver does not feel uncomfortable due to this.

Further, after the air volume regularly fluctuates with time and a predetermined time elapses, the air volume variation means outputs an irregular variation signal to the air volume regulation means. As a result, the air volume fluctuates irregularly with time. That is, the air conditioning user feels refreshed due to irregular fluctuations having a high awakening effect or a resting effect, for example, and can comfortably perform work such as vehicle driving and factory machine driving.

[0009]

As described above, according to the present invention, the air volume variation is performed immediately after the air volume variation is started, and the air volume variation with a high awakening effect or a resting effect can be performed after a predetermined time. The air conditioning user can feel the air volume fluctuation of the air conditioner of the present invention without feeling uncomfortable, and can obtain the comfortable feeling by the air volume fluctuation.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an automobile will be described below with reference to the drawings. First, the overall configuration of one embodiment will be described with reference to FIG.

As shown in FIG. 2, an inside air introduction port 8 and an outside air introduction port 9 are formed on the upstream side of the ventilation duct 20 as a ventilation passage. The inside air introduction port 8 and the outside air introduction port 9 are opened and closed by an inside air / outside air switching damper 6 driven by an inside air / outside air servo motor 5.

A blower for introducing air from the inside air introduction port 8 or the outside air introduction port 9 by rotating itself to the downstream of the inside / outside air switching damper 6 and blowing the air into the vehicle interior through the ventilation duct 20. 19 are provided. The blower 19 is driven by a blower motor 11 driven by a voltage applied from the outside. In addition,
In one embodiment, the blower 19 and the blower motor 11
Constitutes the blowing means.

An evaporator 12, which is a heat exchange means, is arranged downstream of the blower 19. This evaporator 1
Reference numeral 2 denotes a heat exchanger that cools and dehumidifies the air by absorbing heat from the surrounding air by the refrigerant flowing inside itself, and forms a refrigeration cycle together with a compressor, a condenser, and a pressure reducer (not shown). An evaporator blow-out temperature sensor 23 that detects the air temperature immediately after passing through the evaporator 12 is arranged immediately downstream of the evaporator 12.

A heater core 13, which is a heat exchange means, is disposed downstream of the evaporator 12. The heater core 13 is a heat exchanger that heats air by using engine cooling water flowing through a pipe (not shown) as a heat source. The inflow of the engine cooling water into the heater core 13 is interrupted by opening and closing a water valve (not shown). Further, a water temperature sensor (not shown) for detecting the engine cooling water temperature is provided in the pipe.

An air mix damper 21 is disposed upstream of the heater core 13 for adjusting the ratio of the air cooled and dehumidified by the evaporator 12 through the heater core 13 and the ratio of bypassing the heater core 13. Also,
The air mix damper 21 is the air mix servo motor 1.
Driven by four.

The air whose temperature is controlled by the air mix damper 21 is blown from the face outlet 15 toward the upper body of the passenger in the passenger compartment, from the foot outlet 16 toward the feet of the passenger, and a defroster (not shown). It is blown out from the outlet toward the windshield. Opening and closing of the face air outlet, the foot air outlet, and the defroster air outlet are performed by an air outlet switching damper 17 arranged downstream of the heater core 13. The outlet switching damper 17 is driven by the outlet switching servomotor 18.

Further, 1 is an inside air temperature sensor for detecting the air temperature in the vehicle compartment, 2 is an outside air temperature sensor for detecting the outside air temperature,
Reference numeral 3 is a solar radiation sensor that detects the amount of solar radiation that enters the vehicle interior. The signals detected by these sensors are EC
Input to U7.

In addition to the signals from the sensors 1 to 3, a signal from the temperature setting device 10 is input to the ECU 7. Further, the fluctuation start signal from the fluctuation switch 22 is input to the ECU 7. In one embodiment, the fluctuation starting means is composed of the fluctuation switch 22.

A predetermined calculation is performed on the basis of these signals, and based on the calculation result, the inside / outside air servomotor 5, the blower controller 4, which will be described later, and the air mix server.
A control signal is output to the motor 14, the outlet switching servo motor 18, and a water valve (not shown).

Next, driving of the blower 19 will be described with reference to FIG. The ECU 7 performs feedback control of the voltage applied to the blower 19 according to the above-described calculation process.
The blower voltage VM is detected at the terminal 4. ECU
Reference numeral 7 gives a control input from the terminal 3 to the blower controller 4 to control the output voltage BLW. Terminal 2 is blower motor 1
There is a terminal 1 for driving a bypass relay 4a that short-circuits the output terminal of the blower controller 4 in order to drive 1 with the battery voltage (+ B), and the terminal 1 drives a main relay 4b for supplying power to the blower motor 11. Is. Further, 4c is a power transistor, and 4d is a thermal fuse. In one embodiment, the blower controller 4 constitutes the air volume adjusting means.

Next, the operation of the embodiment will be described with reference to FIG. Here, FIG. 4 is a flowchart showing the control processing of the microcomputer in the ECU 7. First, in step 110, the inside air temperature (T
R), the outside air temperature (TAM) from the outside air temperature sensor 2, the amount of solar radiation (TS) from the solar radiation sensor 3, the evaporator outlet temperature (TE) from the evaporator outlet temperature sensor 23, the engine cooling water temperature (not shown) from a water temperature sensor (not shown). TW),
The vehicle interior set temperature (TSET) from the temperature setter 10 and the fluctuation start signal from the fluctuation switch 22 are read.

Next, at step 120, the target outlet air temperature (TAO) as the target value of the outlet air into the vehicle compartment is calculated according to the following mathematical formula 1.

[0023]

## EQU1 ## TAO = KSET.times.TSET-KR.times.TR-KAM.times.TAM-KS.times.TS + C (KSET, KR, KAM, and KS are coefficients,
(C is a constant) Next, in step 130, the target opening degree (SW) of the air mix damper 21 is calculated according to the following formula 2 so that the temperature of the air blown into the vehicle interior becomes the TAO obtained in step 120.

[0024]

## EQU00002 ## SW = (TAO-TE) .times.100 / (TW-TE) (%) Next, at step 140, the blower voltage determined from the correlation shown in FIG. The reference blower voltage V1 is determined from the blower voltage determined by the air flow rate setting device (not shown). Note that FIG.
The correlation shown in FIG.
Remembered in.

Next, in step 150, step 120
The blowout mode corresponding to the TAO obtained in step 1 is determined from the correlation shown in FIG. The correlation shown in FIG. 6 is stored in the ROM in the microcomputer.

Next, at step 160, it is judged if the fluctuation switch 22 (FIG. 2) is turned on. That is, it is determined whether or not the fluctuation start signal is output from the fluctuation switch 22.

When the fluctuation switch 22 is not turned on (NO), that is, when the fluctuation start signal is not output, in step 170, the final blower voltage V to be output to the blower controller 4 is obtained in step 140. The reference blower voltage V1 is determined.

When it is determined in step 160 that the fluctuation switch 22 is turned on (YES), that is, when the fluctuation start signal is output, in step 180, the reference blower voltage V1 obtained in step 140 is determined. The fluctuation width ΔV to be given to the is determined from the correlation shown in FIG.
That is, when the reference blower voltage V1 is low (Lo), the fluctuation width ΔV of 4 volts is applied in the direction (+ direction) in which the blower voltage increases. The reference blower voltage V1 is high (H
In the case of i), 4 in the direction (-direction) in which the blower voltage decreases.
The fluctuation width ΔV of the bolt is given. The correlation shown in FIG. 7 is stored in the ROM in the microcomputer.

Then, in the next step 190, the final blower voltage V to be output to the blower controller 4 is determined to be a value (V1 + ΔV) obtained by adding the above ΔV to the reference blower voltage V1.

In the next step 200, a signal for operating a timer (not shown) is output. The timer is configured to return to 0 when the output state of the fluctuation start signal from the fluctuation switch 22 is released.

In the next step 210, it is determined whether or not 2 minutes or more have elapsed since the timer started operating. If it is determined that 2 minutes or more have not elapsed (NO), the routine proceeds to step 220, where a constant regular fluctuation signal is output so that the blower voltage regularly changes in time. That is, the constant regular fluctuation signal is output so that V (= V1 + ΔV) obtained in step 190 is regularly output to the blower controller 4 in time.

If YES in step 210, an irregular fluctuation signal is output in step 230 so that the blower voltage fluctuates irregularly with time.
That is, V obtained in step 190 (= V1 + ΔV)
Is output to the blower controller 4 irregularly with respect to time, and an irregular fluctuation signal is output.

The fluctuation width ΔV given to the reference blower voltage V1 after the constant regular fluctuation signal or the irregular fluctuation signal is output in steps 220 and 230.
Will be described later with reference to FIG. 1.

In step 240, a control signal is output to the air mix servomotor 14 so that the opening of the air mix damper 21 becomes the SW obtained in step 130. In Step 250, the blower voltage is changed to Step 170.
Alternatively, a control signal is output to the blower controller 4 so that it becomes V obtained in step 190.

In step 260, a control signal is output to the outlet switching servo motor 18 so that the blowout mode becomes the blowout mode determined in step 150. Then return.

Next, what kind of signal is output to the blower controller 4 when the fluctuation switch 22 is turned on when the reference blower voltage V1 is medium (Me) will be described with reference to FIG.

As can be seen from FIG. 1, the fluctuation switch 2
At the same time that 2 is turned on, the fluctuation width ΔV whose upper limit value is +2 volts and whose lower limit value is −2 volts is continuously output to the blower controller 4. As a result, the blower voltage applied to the blower motor 11 continuously fluctuates with the upper limit of Me + 2 volts and the lower limit of Me-2 volts based on the medium (Me) level.

After 2 minutes, the fluctuation width ΔV is irregularly output in time to the blower controller 4. That is, the time t from the output of the fluctuation signal for one cycle to the output of the next fluctuation signal is irregularly output. That is, the time t is controlled to be irregularly output by the irregular fluctuation signal output at step 230 (FIG. 4).

As in the above-mentioned embodiment, the fluctuation switch 2
By controlling the blower voltage so that it fluctuates irregularly with time after 2 minutes have passed since the 2 was turned on,
The resting effect or the awakening effect of the vehicle occupant can be enhanced. This can be proved from the data shown in FIG.

The data shown in FIG. 8 shows that humans initially feel comfortable when given regular fluctuations in time,
It shows that as time goes by, it gradually becomes blind. This also applies to air volume fluctuations. In other words, when the amount of air blown into the passenger compartment is regularly changed with time, the occupant initially feels comfortable, but becomes blunt over time. However, as in one embodiment, by controlling the blower voltage so that it fluctuates irregularly with time, it is possible to continue to give the occupant the resting effect or awakening effect that the fluctuation of the air flow has.

Further, as in the above-described embodiment, by controlling the blower voltage so that it fluctuates regularly over the first 2 minutes after the fluctuation switch 22 is turned on,
Immediately after the occupant turns on the fluctuation switch 22, the air volume fluctuation can be started. As a result, the occupant can obtain the effect of the change in the air volume immediately after turning on the fluctuation switch 22.

In the above embodiment, step 110, step 180, step 190, step 2
00, step 210, step 220, step 23
At 0, the air flow rate varying means was configured.

Although one embodiment in which the present invention is applied to an automobile has been described above, the present invention is not limited to this and can be applied to other air conditioners. Further, in one embodiment, the fluctuation starting means is composed of the fluctuation switch 22. However, for example, a means for automatically starting the fluctuation of the air volume when the difference between the air temperature inside the passenger compartment and the set temperature becomes equal to or lower than a predetermined temperature. It may be configured with.

In one embodiment, the blower controller 4 constitutes the air volume adjusting means. For example, a swing louver,
It may be configured by a ventilation damper in the ventilation duct.

[Brief description of drawings]

FIG. 1 is a time chart explaining the operation of an embodiment of an air conditioner of the present invention.

FIG. 2 is an overall configuration diagram schematically showing an overall configuration of the above-described embodiment.

FIG. 3 is a drive circuit diagram of a blower used in the one embodiment.

FIG. 4 is a flowchart showing a control process of a microcomputer used in the one embodiment.

FIG. 5 is a correlation diagram between TAO and a reference blower voltage in the one embodiment.

FIG. 6 is a correlation diagram between TAO and a blowing mode in the above-described embodiment.

FIG. 7 is a correlation diagram between the reference blower voltage and the fluctuation width in the above embodiment.

FIG. 8 is data showing a general human comfort feeling with respect to temporally regular fluctuations.

[Explanation of symbols]

 4 Blower Controller as Air Flow Control Means 11 Blower Motor as Blower Means 12 Evaporator as Heat Exchange Means 13 Heater Core as Heat Exchange Means 19 Blowers as Blower Means 20 Ventilation Ducts as Ventilation Paths 22 Fluctuation Switch Steps as Fluctuation Starting Steps 110 air volume changing means step 180 air volume changing means step 190 air volume changing means step 200 air volume changing means step 210 air volume changing means step 220 air volume changing means step 230 air volume changing means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takamasa Kawai 1-1, Showa-cho, Kariya city, Aichi Prefecture Nihon Denso Co., Ltd. (72) Inventor Yuji Ito 1-1-cho, Showa-machi, Kariya city, Aichi prefecture Incorporated (72) Inventor Katsuhiko Samukawa 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd.

Claims (1)

[Claims] 1. An air passage for guiding air into the room, an air blower for blowing air into the room through the air passage, and a heat exchange means for cooling or heating the air arranged in the air passage. An air volume adjusting means for adjusting the air volume of the air blown by the air blowing means through the ventilation passage and directly hitting an indoor air conditioning user; a variation start means for outputting a variation start signal for repeatedly varying the air volume; A fluctuation start signal is input, and based on the input of the fluctuation start signal, outputs a constant regular fluctuation signal for causing the fluctuation of the air flow to be regular in time, to the air flow adjusting means,
After a lapse of a predetermined time after the output of the constant regular fluctuation signal, an air volume fluctuation means for outputting an irregular fluctuation signal for causing the fluctuation of the air volume to be irregular in time is provided. A characteristic air conditioner.