JPH01141117A - Automobile air conditioner - Google Patents

Abstract

PURPOSE:To make a passenger feel a sufficient wind speed sense with a relatively small amount of ventilation, so as to reduce a ventilation noise and improve an air conditioning effect by controlling the discharge range of air-conditioned wind in a concentrated discharge state according to an increase in the amount of ventilation. CONSTITUTION:A blower unit 21, a cooling unit 22, and a heater unit 23 are connected together so as to form an air conditioner body 20. In this structure, the blower unit 21 is provided with a blower fan 28 as a ventilation means. And also, a ventilator discharge opening 34 which is formed in the heater unit 23, is provided with a wind direction setting instrument 4 as a discharge range setting means. Then the wind direction setting instrument 4 is controlled by a controller 41 according to each signal from each type of sensors 42-45 and the like for detecting the operating condition of the air conditioner. In this case, the wind direction setting instrument 4 is controlled in a concentrated discharge state according to an increase in the amount of ventilation from the blower fan 28.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vehicle air conditioner that makes it possible to obtain a more comfortable feeling of wind speed without increasing air blowing noise.

BACKGROUND OF THE INVENTION As a conventional automobile air conditioner, one that performs control with the characteristics shown in FIG. 7 has been proposed (Japanese Patent Laid-Open No. 57
(Refer to Publication No.-140216). That is, this device adjusts the pro-armotor applied voltage Vout based on the vehicle interior temperature Tr.
The vehicle interior temperature Tr is set to the set temperature T.
As the blower motor applied voltage Vo approaches set, the blower motor applied voltage Vo
Change ut from large to small and gradually decrease the air volume.

When the difference between the vehicle interior temperature Tr and the set temperature Tset becomes within 2°C, the blower motor applied voltage V out is 6 (v
), and the harmonized air volume fed into the vehicle interior increases and decreases. This gives the occupants seated in the vehicle interior a sense of wind speed that varies over time, thereby preventing a phenomenon in which the sense of comfort deteriorates over time, thereby maintaining the sense of comfort for the occupants.

Problems to be Solved by the Invention However, in such a conventional device, the feeling of wind speed is given to the occupants only by increasing the amount of air blown as the rotation of the proa fan increases. As shown above, the wind speed in front of the passenger always has a corresponding relationship with the applied voltage of the proafan. Therefore, when the wind speed increases, the rotation sound of the proar motor and fan also increases as the proar fan rotates at high speed, and the increased wind speed stimulates the occupants to feel a comfortable wind speed. The noise also causes unpleasant auditory stimulation. For this reason, although a tactilely comfortable feeling of wind speed can be obtained, this comfortable feeling of wind speed is impaired by unpleasant auditory stimulation, and it is not necessarily possible to improve the comfort of the interior environment of the vehicle.

Means for Solving the Problems The present invention has been made in view of such conventional problems, and includes an air outlet provided in front of an occupant seated in a vehicle interior, and air flow through the air outlet to the vehicle. A blowing means for supplying harmonized air into the cabin and controlling the amount of air blown over time; and a Suita range setting means for variably regulating the harmonic air into concentrated air that directs the air to the occupants and diffused air that diffuses the air into the cabin. and a control means for controlling the Suita range setting means to perform concentrated blowing in response to an increase in the amount of air blown by a predetermined amount or more.

Effect: In the configuration described above, the air blowing means increases or decreases over time the amount of harmonized air supplied into the vehicle interior through the air outlet, thereby giving the occupants seated in the vehicle interior a sense of wind speed that changes over time. It will be done. At this time, when the amount of air blown by the air blowing means exceeds a predetermined value, the blowing range setting means is driven and controlled from diffused blowing to concentrated blowing, so that the harmonized air that has been blown over a wide area in the vehicle interior is directed toward the occupants and is centrally supplied. It will be sent.

Therefore, even if the air blowing means produces a smaller change in air volume, the occupants can obtain a large change in the sense of wind speed due to the harmonized air that is supplied intensively, and therefore the air blowing means is used to obtain the desired sense of wind speed. There is no need to use a high air volume that is noisy, and the air blowing noise can be kept to a minimum while providing a sufficient feeling of wind speed.

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

That is, as shown in FIG. 2, the air conditioner main body 20 includes a proa unit 21. It is constructed by connecting a cooling unit 22 and a heater unit 23. The proar unit 21 is provided with an intake door 26 that opens and closes the outside air inlet 24 and the internal inlet 25, and a proa fan 28, which is a blowing means and is driven by a proa fan motor 27. , intake door
An actuator 29 is linked. An evaporator 30 is installed in the cooling unit 22, and a heater core 31 that uses engine cooling water as a heat source is installed in the heater unit 23. On the front side of the heater core 31, an air mix door actuator 32 is connected. An air mix door 33 is pivotally installed. Further, the heater unit 23 is formed with a ventilator outlet 34, a defroster outlet 35, and a foot outlet 36, and the base end of each outlet 34, 35, 36 is connected to a vent door actuator 37. A defroster/foot switching door 40 linked to the vent door 38 and the defroster/foot switching door actuator 39 is pivotally supported. The ventilator outlet 34 is connected to the front seat 1.2.
A plurality of wind direction setting devices 4 are provided in the instrument panel 3 disposed in front of a passenger (not shown) seated in the air ventilator, and within the ventilator outlet 34 there is provided a wind direction setting device 4 as a Suita range setting means as shown in FIG. is provided. The wind direction setting device 4 is provided with a plurality of horizontally rotatable loopers 5 located within the ventilator outlet 34, and the loopers 5 are connected to upper and lower links 6.7.
are interconnected by. A guide pin 8 is provided protrudingly from the lower link 7, and the end of the guide pin 8 is loosely inserted into a bent guide groove 1O carved on the surface of the roller 9. The roller 9 has a shaft 1 protruding from both ends.
1 and 12, and a gear 13 fixed to one shaft 12 is meshed with a gear 15 fixed to the rotating shaft of a drive motor 14. The wind direction setting device 4 is connected to the roller 9 via the drive motor 14.
By rotating the guide pin 8 in the guide groove IO, the guide pin 8 in the guide groove IO is moved from side to side.
. . are directed toward the occupant seated on the seat 1.2, and a diffused blowout mode in which the loopers 5 are directed over a wide area within the vehicle interior.

On the other hand, the input section of the controller 41, which is a control device, includes detection signals from an outside temperature sensor 42, a room temperature sensor 43, a room temperature setter 44, a solar radiation sensor 45, and an outlet temperature sensor 46 that detects the outlet temperature of the ventilator outlet 34. The output section of the controller 4I outputs control signals to the actuators 29, 32, 37, 39, the fan motor 27, and the wind direction setting device 4. It is configured.

Next, the operation of this embodiment according to the above configuration will be explained according to the flowchart shown in FIG.

That is, when an air conditioner switch (not shown) is turned on, the controller 41 as well as the air conditioner main body 20 are activated, and constants A to H used for subsequent process determination are set (step 101). Next, outside temperature Ta, room temperature Tie, room temperature set value Tset, solar radiation amount S, etc. are read from each sensor 42, 43, 45 and room temperature setting device 44 (step 102).
, the difference between room temperature TiC and room temperature set value Tset Tie-Tse
The applied voltage setting value V of the proa fan motor 27 according to t
fan is determined (step 103). Subsequently, the target blowout temperature Tof becomes TOf-A-Ta+B-TIc+
It is calculated as C-Tset+D-9+E (A~E=constant) (step 104), and using this To f',
The air mix door opening degree X is calculated as =F-Tof''+G-Tof+H (F-H constant number) (step 105
), and further in the next step +06, the target blowing temperature Tof
The motor, pie level, and vent outlet modes shown below are selected according to the following.

Heater mode two foot outlet 36 and defroster outlet 35
and open it.

Pie level mode: Open the ventilator outlet 34 and the foot outlet.

Vent mode: Only the ventilator outlet 34 is opened.

Then, in the next step 107, it is determined whether or not the outlet mode selected in the previous step is the vent mode, and if this determination is NO, the proafan applied voltage setting value Vfan calculated in the previous step is A control signal is applied to the pro-aperture motor 27 (step 110), and a control signal is output to the corresponding actuator 37, 39 to open the air outlet according to each mode of heater and pie level.

Step on the other hand! If the determination in step 07 is YES, the room temperature T
The difference between ic and room temperature set value Tset is 2
It is determined whether or not it is smaller than °C.

If this determination is NOl, that is, Tic-Tset is greater than 2°C, the temperature in the vehicle interior has not reached a temperature close to the desired room temperature set value Tset set by the occupant, so it is the same as during normal cool-down. In step 1,
10. Ill processing is performed.

On the other hand, if the determination in step 108 is YES and the temperature in the vehicle interior drops to within 2°C of the room temperature set value Tset,
The process of step 109 is performed, and in this step 109, pulsating wind control that periodically changes the applied voltage of the proa fan, and concentration/diffusion control that changes the wind direction setting device 4 between the concentrated blowing mode and the diffused blowing mode are performed. It will be done. In the pulsating wind control, the voltage applied to the proafan motor 27 is varied over time from 4V, which corresponds to a low wind mL, to 8V, which corresponds to a medium wind ff1M.
In addition, 6.5V is set as the setting switching point C between medium wind ff1M and low air volume. In synchronization with this, in the concentration and diffusion control, the diffusion Suita mode is executed in response to the low air volume of the pulsating wind control, and at the applied voltage of 6.5V, which is the setting switching point C. When the reverse air volume is set to a predetermined value and the applied voltage is higher than the above-mentioned medium wind ff1M, the concentrated blowing mode is executed.

Therefore, the harmonized wind that is blown out over a wide area when the airflow is low is blown in a concentrated manner toward the occupants when the airflow is medium ff1M. For this reason, the proa fan 28 is changed from low wind ff1L (applied voltage 4 to 6.5 V) to medium wind ffiM (
By simply changing the applied voltage to 6.5 to SV), the occupants can experience a large change in wind speed due to the harmonized wind that is centrally supplied. This has become objectively clear from the results of experiments conducted by the authors. In other words, in Fig. 4, the dotted line indicates the applied voltage of the pro-afan and the wind speed in front of the passenger in the conventional example, and the solid line indicates the applied voltage of the pro-afan and the wind speed in front of the passenger in the present example. In this example, the diffused Suita mode is switched to the concentrated blow mode when the proafan applied voltage is around 10.5V, and the applied voltage in parentheses around 10.5V is the maximum voltage value of this example. did.

As a result, it was confirmed that the present example can reduce the voltage reduction of 1.5 V from the maximum pro-a-fan applied voltage of 12 V in the conventional example, while obtaining substantially the same wind speed in front of the occupant as in the conventional example. The rotational noise of the Proa fan motor 27 and the rotational wind noise of the Proa fan 28 are reduced by the number of revolutions corresponding to the voltage reduction of 1.5V of the Shikaya lever, and the noise associated with the increase in air volume is minimized while obtaining the desired feeling of wind speed. It can be stopped to a limited extent.

In addition, the wind direction setting device 4 is not fixed to the concentrated blow mode and changes to the diffuse Suita mode when the proa fan 28 changes from the medium air volume M to the low wind mL. It can supply almost uniform harmonic wind to the entire upper body. Therefore, the difference in the feeling of wind speed between the diffused blowing mode and the concentrated blowing mode becomes even clearer, and as shown as the wind speed difference ΔS in FIG. As a result, it is even possible to increase the wind speed.

Regarding this embodiment, the following aspects are further possible.

(1) In this embodiment, as shown in step 109, the applied voltage of the proafan is changed between 8v and 4v like a sine curve during pulsating wind control, but the applied voltage is changed with an appropriate waveform. The configuration may be such that the

(2) In the above embodiment, 6.5■ was set as the setting switching point C between the medium air volume M and the low air volume. It is possible to use an appropriate value depending on the situation.

(3) Due to the difference between the proafan applied voltage set value Vf an calculated in step 103 and the average value of the applied voltage when performing pulsating air control calculated in step 109, the stability of the blowing air is severely impaired. In some cases, by making the average value coincide with or close to Vf an, the blowing air can be made appropriately stable.

(4) If the average value cannot be brought close enough to Vfan, the stability of the vehicle interior temperature can be ensured by controlling the air mix door 33 that adjusts the blowout temperature.

(5) If the interior of the vehicle is excessively cooled by intermittently setting the proa fan 28 to a medium air volume M, and the room temperature TiC falls below the room temperature set value Tset, the air mix door 3
Excessive cooling can be prevented by appropriately increasing the temperature of the blown air by correcting and controlling 3.

FIG. 5 is a flowchart showing a second embodiment of the present invention, in which steps 301 to 308 and steps 310 and 31
1 performs the same processing and discrimination as in the first embodiment. However, in step 309, which corresponds to step 109 in the first embodiment, the rise and fall when changing the wind direction setting device 4 between the diffused Suita mode and the concentrated blow mode are made oblique, so that the rate of change is slow. be.

According to this embodiment, since a high-speed device is not required as an actuator for driving the looper 5 of the wind direction setting device 4, the wind direction setting device 4 as the blowing range setting means is not required.
can be realized at low cost.

Also, at a slow speed, the mode changes from diffused blowing mode to concentrated blowing mode.
Alternatively, since the concentrated blowing mode changes to the diffused blowing mode, a rapid change in wind speed when changing the blowing mode is prevented. Therefore, the changes in the wind speed perception of the passengers will be slow,
It is also possible to prevent discomfort caused by sudden changes in wind speed.

FIG. 6 is a flowchart showing a third embodiment of the present invention, in which steps 401 to 408 and steps 410 and 41
1 performs the same processing and discrimination as in the first embodiment, but step 4 corresponds to step 109 in the first embodiment.
In 09, different processing is performed. That is, in step 409, the time differential values of the ProAfan applied voltage shown by the solid line and the ProAfan applied voltage shown by the dotted line are calculated, and the ProAfan applied voltage determination line L and the time differential value judgment for both are calculated. Line L is set. and the proafan applied voltage determination line L,
By determining whether the ProAfan applied voltage is equal to or higher than a predetermined value based on the reference value, and determining the magnitude of the time differential value of the ProAfan applied voltage using the time differential value determination line as a reference, the ProAfan applied voltage can be determined. Determine whether or not the number is rapidly increasing. Based on the results of both determinations, if the applied voltage of the proafan is higher than the predetermined value (Ll) and is increasing rapidly than the predetermined value (L,), the wind direction setting device is activated rapidly to blow out the diffused air. mode to concentrated blowing mode.

On the other hand, when the proafan applied voltage is below the predetermined value (L□), and even if it is above the predetermined value (Ll), if the change is not more rapid than the predetermined value (L,), the air direction setting device 4 is activated. It operates at low speed to switch between the blowout modes.

According to the third embodiment, the change from the diffused blowing mode to the concentrated blowing mode is performed only when the change in the applied voltage of the pro-afan increases rapidly and the actual air volume from the pro-afan motor 27 cannot follow this. can be done rapidly. Therefore, it is possible to compensate for the time delay in changing the air volume by rapidly switching from the diffused blowing mode to the concentrated blowing mode. On the other hand, if the voltage applied to the proa fan is low and the air volume is small, even if the actual change in the proa fan's air volume is delayed from the set value, there will be no large change in the air volume to the occupants, and there will be no significant change in the air volume between the set voltage and the actual voltage. Since there is almost no time delay, there is no problem in the user's experience even if the blowing mode is switched to a low speed. Therefore, in cases where no hindrance to the sense of sensation occurs, by operating the wind direction setting device 4 at a low speed, it is possible to extend the life of the actuator of the wind direction setting device 4, that is, the drive motor 14, etc. It is.

As described in detail, in the present invention, when the amount of air blown by the air blowing means that increases or decreases the amount of air blown over time exceeds a predetermined value, the blowing range setting means is controlled to perform concentrated blowing. Therefore, even if the air blowing means changes the air volume by a smaller amount, the occupant can obtain a large change in the feeling of wind speed due to the harmonized air that is centrally supplied. There is no need to use high airflow volume, which can be noisy, and the airflow noise can be kept to a minimum while still providing a sufficient feeling of wind speed.
It becomes possible to improve comfort.

In addition, in the second embodiment, since the speed of change of the wind direction setting device is made slow, a high-speed device is not required as an actuator for driving the wind direction setting device, and costs can be reduced. Furthermore, in the fourth embodiment, the wind direction setting device is driven at high speed only when the predetermined conditions are met, and is driven at low speed in other cases, so that the life of the wind direction setting device can be extended. It also makes it possible.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing the first embodiment of the present invention, Fig. 2 is an overall conceptual diagram of the embodiment, Fig. 3 is a front explanatory view showing the wind direction setting device of the embodiment, and Fig. 4 is the same implementation. Explanatory diagrams showing the experimental results of the example, Figures 5 and 6 are the second example of the present invention. FIG. 7 is a flowchart showing the third embodiment, FIG. 7 is a control characteristic diagram of a conventional automobile air conditioner, and FIG. 8 is an explanatory diagram showing the relationship between the applied voltage of the pro-a-fan of the same device and the wind speed in front of the passenger. 1.2... Seat, 4... Wind direction setting device (air blowing range setting means), 28... Proa fan (air blowing means), 34...
... Ventilator outlet, 41... Controller (control device).

Claims (1)

[Claims] (1) An air outlet provided in front of a passenger seated in the vehicle interior, and a blowing means for supplying harmonized air into the vehicle interior through the outlet and controlling the amount of air blown to be increased or decreased over time; a blowout range setting means for variably restricting the harmonized air to a concentrated blowout that directs the harmonized air toward the occupants and a diffused blowout that diffuses the harmonized air into the passenger compartment; and a blowout range setting means that controls the blowout range setting means to the concentrated blowout in response to an increase in the airflow amount beyond a predetermined value. An air conditioner for an automobile, comprising a control means.