JPH01141115A - Car air conditioner - Google Patents

Abstract

PURPOSE:To give riders confortable wind velocity feeling and improve, further, air conditioning effect by compensating the blow-off temperature of air conditioned wind so as to lower it by predetermined value according to the increase in air conditioned wind velocity toward riders. CONSTITUTION:An air conditioner body 20 comprises a blower unit 21, cooling unit 22 and heeter unit 23 connected to each other. The heating unit 23 is arranged with an air mixed door 33 that is a temperature adjusting means in front of a heater core, and the spit hole 34 of a ventilator is also arranged with a wind direction setting devices 8 and 9 equipped with a plurality of deflection plates 6 and 7 that are means capable of varying a wind direction. In this constitution, the air mix door 33 performs controlling by means of a controller 41 through an actuator 32 based on each of the signals from various sensors 42 through 45 for detecting the operation state of an air conditioner and lowers the blow-off temperature air conditioned wind according to the increase in the wind velocity toward riders.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to an air conditioner for an automobile that allows a more comfortable wind speed to be obtained.

BACKGROUND OF THE INVENTION As a conventional air conditioner for automobiles, the structure shown in Fig. 7 has been proposed (Japanese Patent Laid-Open No. 15008/1983).
. That is, an instrument panel 3 is disposed in front of the front seat 1.2, and air outlet ports 4.5 of an air conditioner are provided on both sides of the instrument panel 3, respectively. The air outlet 4.5 has a plurality of deflection plates 6...,
A louver-type wind direction setting device 8.9 having a wind direction setting device 8.9 is provided. It is configured so that it can be deflected between a first setting position where the air is blown toward the occupant seated on the vehicle, and a second setting position where the air is blown away from the occupant as shown by the broken line. . Each of the wind direction setting devices 8.9 is also provided with an actuating lever 10.2, which actuating lever 10.11 is connected to the actuating lever 1 of the actuating device 13 by means of connecting rods 12a, 12b, respectively.
It is linked to 4. 'The operation of the drive device 13 is controlled based on a control signal output by a control device 15, and the control device 15 receives an input signal from a room temperature setting device 16 provided on the instrument panel 3. The control signal is output in accordance with the difference between the set temperature and the vehicle interior temperature detected by the room temperature sensor 17.

In such a configuration, the control device 15 reads the room temperature setting value inputted into the room temperature setting device 16 by the setting operation by the occupant and the room temperature detected by the room temperature sensor 17, compares the temperature difference between the two with a predetermined value, and determines the temperature difference. is larger than the predetermined value, the drive bag W113 drives the drive lever 14 to the position shown by the solid line. As a result, the set wind direction values 8°9 are each changed to the first set position, and the conditioned air supplied from the air outlet 4.5 is concentrated and blown toward the occupant seated on the seat 1.2. becomes. Therefore, when cooling down after parking in the hot sun, the occupants can quickly feel cooled down by the cold air that is directly blown onto them. If the temperature difference is smaller than the predetermined value, the drive device 13 drives the drive lever 14 to the position indicated by the broken line, and as a result, the wind direction set value 8.9 is set to the second set position. change the angle to Therefore, the air outlet 4.
The conditioned air supplied from the air conditioner 1.5 deviates from the occupant seated on the seat 1.2 and spreads over the entire interior of the vehicle, making it possible to obtain a diffused blowout suitable for steady air conditioning.

Problems to be Solved by the Invention However, in such a conventional automobile air conditioner, the temperature inside the vehicle is detected as described above, and when the thermal environment state inside the vehicle reaches a set condition, the concentrated blowing is changed to the diffused blowing. It is configured to switch to

For this reason, once the state of diffused air blows, the initial discomfort of being directly blown by the cold air is eliminated and a comfortable feeling is obtained. However, if the diffused air continues for a long time, the wind speed does not change because there is no change in the blowing airflow. However, the comfort level was impaired.

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 a passenger seated in a vehicle interior, and air supplied from the air outlet. a blowout variable means for temporally varying the condition of the harmonized air, and a temperature adjustment means for controlling the temperature of the harmonized air according to a target blowout temperature calculated based on the heat load conditions in the vehicle interior. The air conditioner for an automobile includes a correction signal generating means for lowering the target air outlet temperature by a predetermined value in accordance with an increase in wind speed toward the passenger due to the operation of the air outlet variable means.

Operation In the above configuration, the temperature adjusting means controls the temperature of the regulated air according to the target blowing temperature based on the heat load conditions. Therefore, harmonized air whose temperature is controlled by the temperature adjusting means is supplied from the air outlet, and the blowing state of the harmonized air is temporally varied by the blowing variable means. At this time, when the wind speed in the direction of the occupant seated in the vehicle compartment increases due to the operation of the blowout variable means, the correction signal generating means generates a signal that lowers the blowout temperature by a predetermined value. Therefore, the temperature adjusting means lowers the temperature of the harmonized air based on the target blowout temperature, the wind speed increases, and the low-temperature harmonized air is blown out toward the passenger from the air outlet.

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 an outside air inlet 24 and an internal inlet 25, and a proa fan 28 whose driving source is a proa fan motor 27. - Actuator 29 is linked. The cooling unit 22
There is an evaporator 30 inside, and the heater unit 23
A heater core 31 that uses engine cooling water as a heat source is installed inside the heater core 31, and an air mix door 33, which is a temperature control means linked to an air mix door actuator 32, is pivotally installed in front of the heater core 31. . Further, the heater unit 23 is provided with a ventilator outlet 34, a defroster outlet 35, and a foot outlet 36. A vent door 38 is connected to a vent door actuator 37.
, and a defroster/foot switching door 40 linked to the defroster/foot switching door actuator 39 are pivotally supported.

A plurality of ventilator outlets 34 are formed in the instrument panel 3 disposed in front of the front seat 1.2 on which a passenger (not shown) sits. deflection plate 6...,
A louver-type wind direction setting device 8.9 having 7... is provided. The wind direction setting device 8.9 has a structure similar to that shown in FIG. 7, for example, and has actuation levers io, z. It has a structure linked to the drive lever 14.

On the other hand, the input section of the controller 41 equipped with a correction signal generating means includes an outside temperature sensor 42, a room temperature sensor 43, a room temperature setter 44, a solar radiation sensor 45, and a ventilator outlet 34.
A blower that detects the air outlet temperature.

A detection signal from the outlet temperature sensor 46 is inputted, and from the output section of the controller 41, signals are sent to the actuators 29, 32, 37, 39, the proafan motors 2, 7, and the drive device 13. (FIG. 6) is configured to output a control signal.

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, the outside temperature Tas, room temperature Tic, room temperature set value T set, solar radiation S, etc. are read from each sensor 42, 43, 45 and room temperature setter 44 (step 102), and the room temperature TiC and room temperature set value Tset are read. Difference Tie
-Tset, the applied voltage setting value Vfan of the pro-afan motor 27 is determined (step 103). Subsequently, the target blowout temperature Tof' becomes TOf'=A・T&
+B-Ti c+, C-T, set+D-8+E(A-
(step 104), and this T
Using o f', X=F-Tof' ”+G-T o
The air mix door opening degree X is calculated as f + H (F - H = constant) (step 105), and then the next step 1
At 0B, the target blowout temperature T.

Depending on f', the following motor, pie level, and vent outlet modes are selected.

Heater mode: 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 target outlet temperature To f'
is processed as the outlet temperature Tof necessary to asymptotically maintain the room temperature set value Tsat (step 112). Furthermore, in step 113, the pre-calculated proafan applied voltage set value Vfan is applied to the proafan motor 27, and in step 114, the air outlet is opened or the air mix door 33 is opened according to each mode of the heater and pie level. A control signal is output to each door actuator 32, 37, 39 to set the opening degree X.

On the other hand, if the determination in step 107 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-Tsat is greater than 2°C, it means that the temperature in the vehicle interior has not reached a temperature close to the room temperature set value Tset set by the occupant.
Similar to the cooldown, steps 112, 113, 1
14 processes are performed.

On the other hand, if the determination in step 108 is YES and the temperature in the vehicle interior has fallen to within 2°C of the room temperature set value Tsat, the process of step 1°09 is performed.
At 09, pulsating air control is performed to vary the blowing state of the harmonized air fed from the ventilator outlet 34. In this pulsating air control, diffused blowing and concentrated blowing are performed alternately for 15 seconds each with a change time of 5 seconds, for example, and during diffused blowing, the airflow is forward as shown by the broken line in Figure 7. The airflow is blown away from the passenger seated in the front seat 1.2, and in the case of concentrated airflow, the airflow is blown out in the direction of the passenger seated in the front seat 1.2, as shown by the solid line in the figure. . Step 11 is a correction signal generating means.
0, it is determined whether or not the pulsating wind control being executed in step 109 is in the concentrated blow mode at that point in time. If this determination is NO, that is, if it is the diffusion blowing mode, the processes from step 112 described above are performed. On the other hand, if step 110 is No, it is determined that the wind speed in the direction of the occupants seated in the front seats 1 and 2 in the concentrated blow mode is higher than that in the diffuse blow mode, and in step 111, which is a correction signal generating means, To f=To f'-
2 ('C), the outlet temperature Tof is the target outlet temperature Tof'
The value is set to 2°C lower than the actual temperature. Therefore step 1
When a control signal is output to the air mix door actuator 32 in step 14, the air mix door 33 reduces the amount of air passing through the heater core 31 in order to lower the temperature of the harmonized air supplied from the ventilator outlet 34 by 2°C. rotate in the direction. Therefore, from the ventilator outlet 34, harmonized air whose wind speed is increased by the concentrated blowing mode and whose temperature is 2° C. lower than that in the diffused mode is blown toward the occupant seated in the front seat 1.2. Therefore, the occupants seated in the front seats 1.2 are stimulated by the harmonized wind, which is high in wind speed during concentrated blowing that is repeated intermittently, but at a lower temperature than during diffused blowing, and can feel the wind speed and feel comfortable. can be maintained.

FIG. 3 is a flowchart showing a second embodiment of the present invention, in which steps 201 to 208 perform the same processing and determination as steps 101 to 108 of the first embodiment, and steps 210 to 213 Step 111 of one embodiment
Processing similar to steps 114 to 114 is performed. But step 2
In step 209 following 08, during concentrated blowing, the blowing temperature Tof is set to Tof' -2 and the target blowing temperature To f'
The process of lowering the temperature by 2° C. is performed for Δt seconds prior to the concentrated blowing mode.

In such embodiments, the temperature change of the harmonized air usually lags a little after switching from diffused blowing to concentrated blowing, but by performing the process of lowering the blowing temperature Tof in advance of the start time of diffused blowing, , it is possible to substantially synchronize the start time of diffusion blowing and the start time of temperature drop of the conditioned air. Therefore, the occupants can receive comfortable stimulation from the harmonized wind, which is 2°C lower than the diffused wind waiting, without delay from the start of the diffused wind waiting.

FIG. 4 is a flowchart showing the third embodiment of the present invention, and the process 1 determination in steps aOt~308 and 310~313 is performed in steps 201~208 and 21 in the second embodiment.
Same as 0-213.

However, in this embodiment, the proa fan 28 is used as a variable blowing means, and by synchronously changing the air volume of the proa fan 28 from a low air volume to a high air volume as shown in step 309, the harmonic wind speed is is made to vary over time. Then, in synchronization with the high air volume when the harmonic wind speed increases, the outlet temperature Tof is lowered by 2°C, so that the passengers seated in the front seats 1 and 2 can enjoy the high wind speed and low airflow at the high air volume. You can experience a harmonious wind that is cooler than the airflow.

According to the third embodiment, the first. As in the case where the blowout variable means is the wind direction setting device 8.9 in the second embodiment, a feeling of wind speed can be obtained without the need for the wind direction setting device 8.9, and the device can be simplified and reduced. It can be implemented at low cost.

FIG. 5 is a flowchart showing a fourth embodiment of the present invention, in which steps 401 to 408 and 410413 are processed.
The determination is made in steps 2゜l to 208 and 210 of the second embodiment.
Process 1 determination similar to ~213 is performed. However, in step 409 following step 408, when the harmonic wind speed increases and the air volume is high, the process of setting the outlet temperature Tof to Tof'-2 and lowering it by 2 degrees Celsius from the target Suita temperature Tof' is carried out by Δ seconds in advance. That's how it is.

In this embodiment, by performing the process of lowering the outlet temperature Tof prior to the high air volume of the harmonized air, it is possible to synchronize the start of the temperature decrease with the start of the high air volume, as in the second embodiment, and the delay is reduced. It is possible to obtain comfortable stimulation by harmonizing the low temperature and high air volume.

As shown in Fig. 6, if the blowing temperature Tof is gradually changed from Tof' -2 to Tof' during concentrated blowing, it is possible to reduce the temperature caused by the rapid temperature rise when changing from diffused blowing to concentrated blowing. It is possible to prevent discomfort, and in this way, the blowing temperature To during diffused blowing or concentrated blowing can be reduced.
For the correction of f, it is possible to select one with appropriate change characteristics.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention temporally varies the blowing condition of the harmonized air supplied from the outlet, and changes the harmonic air according to the increase in the wind speed toward the passenger due to the variation in the blowing condition. The blowing temperature was lowered. Therefore, the occupants seated in the vehicle interior are stimulated by the temporally repeated high wind speed and low temperature harmonized wind, and are able to experience the sensation of wind speed, thereby maintaining comfort.

In addition, the second. In the fourth embodiment, by performing the process of lowering the blowing temperature prior to changing the blowing state,
It is possible to synchronize the time when the actual blowout temperature starts to decrease and the time when the change in the blowout condition starts. Also 3rd. In the fourth embodiment, since a proa-fan is used as a variable blowing means, a wind direction setting device is not required, and it can be put to practical use at low cost.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing a first embodiment of the present invention, FIG. 2 is an overall conceptual diagram of the same embodiment, and FIGS. Third. FIG. 6 is a flowchart showing the fourth embodiment, FIG. 6 is an outlet temperature control characteristic diagram of the fifth embodiment of the present invention, and FIG. 7 is an explanatory diagram showing a conventional automobile air conditioner. 1.2... Seat, 8.9... Wind direction setting device (outflow variable means), 33... Air mix door (temperature adjustment means)
, 28... Proafan (blowout variable means), 41...
・Controller (arithmetic control device).

Claims (1)

[Claims] (1) An air outlet provided in front of a passenger seated in the vehicle interior, an airflow variable means for temporally varying the blowing state of the harmonized air supplied from the air outlet, and heat load conditions in the vehicle interior. In the automobile air conditioner, the temperature adjusting means controls the temperature of the conditioned air in accordance with a target blowout temperature calculated based on the temperature control means. An air conditioner for an automobile, comprising a correction signal generating means for lowering a target outlet temperature by a predetermined value.